From e14455579a7ff3e3d17c79bb5aa62c13d3c4a8ed Mon Sep 17 00:00:00 2001 From: Michel Pollet Date: Wed, 6 Jun 2012 08:45:16 +0100 Subject: [PATCH] shared: Removed mongoose It was never needed in the end Signed-off-by: Michel Pollet --- examples/board_reprap/Makefile | 2 +- examples/shared/mongoose.c | 4254 -------------------------------- examples/shared/mongoose.h | 238 -- 3 files changed, 1 insertion(+), 4493 deletions(-) delete mode 100644 examples/shared/mongoose.c delete mode 100644 examples/shared/mongoose.h diff --git a/examples/board_reprap/Makefile b/examples/board_reprap/Makefile index 704aab7..8fbfc0e 100644 --- a/examples/board_reprap/Makefile +++ b/examples/board_reprap/Makefile @@ -56,7 +56,7 @@ include ${simavr}/Makefile.common board = ${OBJ}/${target}.elf -${board} : ${OBJ}/mongoose.o +${board} : ${OBJ}/arduidiot_pins.o ${board} : ${OBJ}/button.o ${board} : ${OBJ}/uart_pty.o ${board} : ${OBJ}/thermistor.o diff --git a/examples/shared/mongoose.c b/examples/shared/mongoose.c deleted file mode 100644 index d504b19..0000000 --- a/examples/shared/mongoose.c +++ /dev/null @@ -1,4254 +0,0 @@ -// Copyright (c) 2004-2011 Sergey Lyubka -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -// THE SOFTWARE. - -#if defined(_WIN32) -#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005 -#else -#define _XOPEN_SOURCE 600 // For flockfile() on Linux -#define _LARGEFILE_SOURCE // Enable 64-bit file offsets -#define __STDC_FORMAT_MACROS // wants this for C++ -#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX -#endif - -#if defined(__SYMBIAN32__) -#define NO_SSL // SSL is not supported -#define NO_CGI // CGI is not supported -#define PATH_MAX FILENAME_MAX -#endif // __SYMBIAN32__ - -#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE -#include -#include -#include -#include -#include -#endif // !_WIN32_WCE - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific -#define _WIN32_WINNT 0x0400 // To make it link in VS2005 -#include - -#ifndef PATH_MAX -#define PATH_MAX MAX_PATH -#endif - -#ifndef _WIN32_WCE -#include -#include -#include -#else // _WIN32_WCE -#include -#include -#define NO_CGI // WinCE has no pipes - -typedef long off_t; -#define BUFSIZ 4096 - -#define errno GetLastError() -#define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) -#endif // _WIN32_WCE - -#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ - ((uint64_t)((uint32_t)(hi))) << 32)) -#define RATE_DIFF 10000000 // 100 nsecs -#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de) -#define SYS2UNIX_TIME(lo, hi) \ - (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) - -// Visual Studio 6 does not know __func__ or __FUNCTION__ -// The rest of MS compilers use __FUNCTION__, not C99 __func__ -// Also use _strtoui64 on modern M$ compilers -#if defined(_MSC_VER) && _MSC_VER < 1300 -#define STRX(x) #x -#define STR(x) STRX(x) -#define __func__ "line " STR(__LINE__) -#define strtoull(x, y, z) strtoul(x, y, z) -#define strtoll(x, y, z) strtol(x, y, z) -#else -#define __func__ __FUNCTION__ -#define strtoull(x, y, z) _strtoui64(x, y, z) -#define strtoll(x, y, z) _strtoi64(x, y, z) -#endif // _MSC_VER - -#define ERRNO GetLastError() -#define NO_SOCKLEN_T -#define SSL_LIB "ssleay32.dll" -#define CRYPTO_LIB "libeay32.dll" -#define DIRSEP '\\' -#define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\') -#define O_NONBLOCK 0 -#if !defined(EWOULDBLOCK) -#define EWOULDBLOCK WSAEWOULDBLOCK -#endif // !EWOULDBLOCK -#define _POSIX_ -#define INT64_FMT "I64d" - -#define WINCDECL __cdecl -#define SHUT_WR 1 -#define snprintf _snprintf -#define vsnprintf _vsnprintf -#define mg_sleep(x) Sleep(x) - -#define pipe(x) _pipe(x, BUFSIZ, _O_BINARY) -#define popen(x, y) _popen(x, y) -#define pclose(x) _pclose(x) -#define close(x) _close(x) -#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) -#define RTLD_LAZY 0 -#define fseeko(x, y, z) fseek((x), (y), (z)) -#define fdopen(x, y) _fdopen((x), (y)) -#define write(x, y, z) _write((x), (y), (unsigned) z) -#define read(x, y, z) _read((x), (y), (unsigned) z) -#define flockfile(x) EnterCriticalSection(&global_log_file_lock) -#define funlockfile(x) LeaveCriticalSection(&global_log_file_lock) - -#if !defined(fileno) -#define fileno(x) _fileno(x) -#endif // !fileno MINGW #defines fileno - -typedef HANDLE pthread_mutex_t; -typedef struct {HANDLE signal, broadcast;} pthread_cond_t; -typedef DWORD pthread_t; -#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here. - -struct timespec { - long tv_nsec; - long tv_sec; -}; - -static int pthread_mutex_lock(pthread_mutex_t *); -static int pthread_mutex_unlock(pthread_mutex_t *); -static FILE *mg_fopen(const char *path, const char *mode); - -#if defined(HAVE_STDINT) -#include -#else -typedef unsigned int uint32_t; -typedef unsigned short uint16_t; -typedef unsigned __int64 uint64_t; -typedef __int64 int64_t; -#define INT64_MAX 9223372036854775807 -#endif // HAVE_STDINT - -// POSIX dirent interface -struct dirent { - char d_name[PATH_MAX]; -}; - -typedef struct DIR { - HANDLE handle; - WIN32_FIND_DATAW info; - struct dirent result; -} DIR; - -#else // UNIX specific -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#if !defined(NO_SSL_DL) && !defined(NO_SSL) -#include -#endif -#include -#if defined(__MACH__) -#define SSL_LIB "libssl.dylib" -#define CRYPTO_LIB "libcrypto.dylib" -#else -#if !defined(SSL_LIB) -#define SSL_LIB "libssl.so" -#endif -#if !defined(CRYPTO_LIB) -#define CRYPTO_LIB "libcrypto.so" -#endif -#endif -#define DIRSEP '/' -#define IS_DIRSEP_CHAR(c) ((c) == '/') -#ifndef O_BINARY -#define O_BINARY 0 -#endif // O_BINARY -#define closesocket(a) close(a) -#define mg_fopen(x, y) fopen(x, y) -#define mg_mkdir(x, y) mkdir(x, y) -#define mg_remove(x) remove(x) -#define mg_rename(x, y) rename(x, y) -#define mg_sleep(x) usleep((x) * 1000) -#define ERRNO errno -#define INVALID_SOCKET (-1) -#define INT64_FMT PRId64 -typedef int SOCKET; -#define WINCDECL - -#endif // End of Windows and UNIX specific includes - -#include "mongoose.h" - -#define MONGOOSE_VERSION "3.2" -#define PASSWORDS_FILE_NAME ".htpasswd" -#define CGI_ENVIRONMENT_SIZE 4096 -#define MAX_CGI_ENVIR_VARS 64 -#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) - -#ifdef _WIN32 -static CRITICAL_SECTION global_log_file_lock; -static pthread_t pthread_self(void) { - return GetCurrentThreadId(); -} -#endif // _WIN32 - -#if defined(DEBUG) -#define DEBUG_TRACE(x) do { \ - flockfile(stdout); \ - printf("*** %lu.%p.%s.%d: ", \ - (unsigned long) time(NULL), (void *) pthread_self(), \ - __func__, __LINE__); \ - printf x; \ - putchar('\n'); \ - fflush(stdout); \ - funlockfile(stdout); \ -} while (0) -#else -#define DEBUG_TRACE(x) -#endif // DEBUG - -// Darwin prior to 7.0 and Win32 do not have socklen_t -#ifdef NO_SOCKLEN_T -typedef int socklen_t; -#endif // NO_SOCKLEN_T - -#if !defined(MSG_NOSIGNAL) -#define MSG_NOSIGNAL 0 -#endif - -typedef void * (*mg_thread_func_t)(void *); - -static const char *http_500_error = "Internal Server Error"; - -// Snatched from OpenSSL includes. I put the prototypes here to be independent -// from the OpenSSL source installation. Having this, mongoose + SSL can be -// built on any system with binary SSL libraries installed. -typedef struct ssl_st SSL; -typedef struct ssl_method_st SSL_METHOD; -typedef struct ssl_ctx_st SSL_CTX; - -#define SSL_ERROR_WANT_READ 2 -#define SSL_ERROR_WANT_WRITE 3 -#define SSL_FILETYPE_PEM 1 -#define CRYPTO_LOCK 1 - -#if defined(NO_SSL_DL) -extern void SSL_free(SSL *); -extern int SSL_accept(SSL *); -extern int SSL_connect(SSL *); -extern int SSL_read(SSL *, void *, int); -extern int SSL_write(SSL *, const void *, int); -extern int SSL_get_error(const SSL *, int); -extern int SSL_set_fd(SSL *, int); -extern SSL *SSL_new(SSL_CTX *); -extern SSL_CTX *SSL_CTX_new(SSL_METHOD *); -extern SSL_METHOD *SSLv23_server_method(void); -extern int SSL_library_init(void); -extern void SSL_load_error_strings(void); -extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int); -extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int); -extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *); -extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t); -extern void SSL_CTX_free(SSL_CTX *); -extern unsigned long ERR_get_error(void); -extern char *ERR_error_string(unsigned long, char *); -extern int CRYPTO_num_locks(void); -extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int)); -extern void CRYPTO_set_id_callback(unsigned long (*)(void)); -#else -// Dynamically loaded SSL functionality -struct ssl_func { - const char *name; // SSL function name - void (*ptr)(void); // Function pointer -}; - -#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr) -#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr) -#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr) -#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr) -#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr) -#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr) -#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr) -#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr) -#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr) -#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr) -#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr) -#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \ - const char *, int)) ssl_sw[11].ptr) -#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \ - const char *, int)) ssl_sw[12].ptr) -#define SSL_CTX_set_default_passwd_cb \ - (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr) -#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr) -#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr) -#define SSL_CTX_use_certificate_chain_file \ - (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr) - -#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr) -#define CRYPTO_set_locking_callback \ - (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr) -#define CRYPTO_set_id_callback \ - (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr) -#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr) -#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr) - -// set_ssl_option() function updates this array. -// It loads SSL library dynamically and changes NULLs to the actual addresses -// of respective functions. The macros above (like SSL_connect()) are really -// just calling these functions indirectly via the pointer. -static struct ssl_func ssl_sw[] = { - {"SSL_free", NULL}, - {"SSL_accept", NULL}, - {"SSL_connect", NULL}, - {"SSL_read", NULL}, - {"SSL_write", NULL}, - {"SSL_get_error", NULL}, - {"SSL_set_fd", NULL}, - {"SSL_new", NULL}, - {"SSL_CTX_new", NULL}, - {"SSLv23_server_method", NULL}, - {"SSL_library_init", NULL}, - {"SSL_CTX_use_PrivateKey_file", NULL}, - {"SSL_CTX_use_certificate_file",NULL}, - {"SSL_CTX_set_default_passwd_cb",NULL}, - {"SSL_CTX_free", NULL}, - {"SSL_load_error_strings", NULL}, - {"SSL_CTX_use_certificate_chain_file", NULL}, - {NULL, NULL} -}; - -// Similar array as ssl_sw. These functions could be located in different lib. -static struct ssl_func crypto_sw[] = { - {"CRYPTO_num_locks", NULL}, - {"CRYPTO_set_locking_callback", NULL}, - {"CRYPTO_set_id_callback", NULL}, - {"ERR_get_error", NULL}, - {"ERR_error_string", NULL}, - {NULL, NULL} -}; -#endif // NO_SSL_DL - -static const char *month_names[] = { - "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" -}; - -// Unified socket address. For IPv6 support, add IPv6 address structure -// in the union u. -union usa { - struct sockaddr sa; - struct sockaddr_in sin; -#if defined(USE_IPV6) - struct sockaddr_in6 sin6; -#endif -}; - -// Describes a string (chunk of memory). -struct vec { - const char *ptr; - size_t len; -}; - -// Structure used by mg_stat() function. Uses 64 bit file length. -struct mgstat { - int is_directory; // Directory marker - int64_t size; // File size - time_t mtime; // Modification time -}; - -// Describes listening socket, or socket which was accept()-ed by the master -// thread and queued for future handling by the worker thread. -struct socket { - struct socket *next; // Linkage - SOCKET sock; // Listening socket - union usa lsa; // Local socket address - union usa rsa; // Remote socket address - int is_ssl; // Is socket SSL-ed -}; - -enum { - CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER, - PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE, - SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE, - GLOBAL_PASSWORDS_FILE, INDEX_FILES, - ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE, - EXTRA_MIME_TYPES, LISTENING_PORTS, - DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER, REWRITE, - NUM_OPTIONS -}; - -static const char *config_options[] = { - "C", "cgi_pattern", "**.cgi$|**.pl$|**.php$", - "E", "cgi_environment", NULL, - "G", "put_delete_passwords_file", NULL, - "I", "cgi_interpreter", NULL, - "P", "protect_uri", NULL, - "R", "authentication_domain", "mydomain.com", - "S", "ssi_pattern", "**.shtml$|**.shtm$", - "a", "access_log_file", NULL, - "c", "ssl_chain_file", NULL, - "d", "enable_directory_listing", "yes", - "e", "error_log_file", NULL, - "g", "global_passwords_file", NULL, - "i", "index_files", "index.html,index.htm,index.cgi", - "k", "enable_keep_alive", "no", - "l", "access_control_list", NULL, - "M", "max_request_size", "16384", - "m", "extra_mime_types", NULL, - "p", "listening_ports", "8080", - "r", "document_root", ".", - "s", "ssl_certificate", NULL, - "t", "num_threads", "10", - "u", "run_as_user", NULL, - "w", "url_rewrite_patterns", NULL, - NULL -}; -#define ENTRIES_PER_CONFIG_OPTION 3 - -struct mg_context { - volatile int stop_flag; // Should we stop event loop - SSL_CTX *ssl_ctx; // SSL context - char *config[NUM_OPTIONS]; // Mongoose configuration parameters - mg_callback_t user_callback; // User-defined callback function - void *user_data; // User-defined data - - struct socket *listening_sockets; - - volatile int num_threads; // Number of threads - pthread_mutex_t mutex; // Protects (max|num)_threads - pthread_cond_t cond; // Condvar for tracking workers terminations - - struct socket queue[20]; // Accepted sockets - volatile int sq_head; // Head of the socket queue - volatile int sq_tail; // Tail of the socket queue - pthread_cond_t sq_full; // Singaled when socket is produced - pthread_cond_t sq_empty; // Signaled when socket is consumed -}; - -struct mg_connection { - struct mg_request_info request_info; - struct mg_context *ctx; - SSL *ssl; // SSL descriptor - struct socket client; // Connected client - time_t birth_time; // Time connection was accepted - int64_t num_bytes_sent; // Total bytes sent to client - int64_t content_len; // Content-Length header value - int64_t consumed_content; // How many bytes of content is already read - char *buf; // Buffer for received data - char *path_info; // PATH_INFO part of the URL - int must_close; // 1 if connection must be closed - int buf_size; // Buffer size - int request_len; // Size of the request + headers in a buffer - int data_len; // Total size of data in a buffer -}; - -const char **mg_get_valid_option_names(void) { - return config_options; -} - -static void *call_user(struct mg_connection *conn, enum mg_event event) { - conn->request_info.user_data = conn->ctx->user_data; - return conn->ctx->user_callback == NULL ? NULL : - conn->ctx->user_callback(event, conn, &conn->request_info); -} - -static int get_option_index(const char *name) { - int i; - - for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) { - if (strcmp(config_options[i], name) == 0 || - strcmp(config_options[i + 1], name) == 0) { - return i / ENTRIES_PER_CONFIG_OPTION; - } - } - return -1; -} - -const char *mg_get_option(const struct mg_context *ctx, const char *name) { - int i; - if ((i = get_option_index(name)) == -1) { - return NULL; - } else if (ctx->config[i] == NULL) { - return ""; - } else { - return ctx->config[i]; - } -} - -static void sockaddr_to_string(char *buf, size_t len, - const union usa *usa) { - buf[0] = '\0'; -#if defined(USE_IPV6) - inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? - (void *) &usa->sin.sin_addr : - (void *) &usa->sin6.sin6_addr, buf, len); -#elif defined(_WIN32) - // Only Windoze Vista (and newer) have inet_ntop() - strncpy(buf, inet_ntoa(usa->sin.sin_addr), len); -#else - inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); -#endif -} - -// Print error message to the opened error log stream. -static void cry(struct mg_connection *conn, const char *fmt, ...) { - char buf[BUFSIZ], src_addr[20]; - va_list ap; - FILE *fp; - time_t timestamp; - - va_start(ap, fmt); - (void) vsnprintf(buf, sizeof(buf), fmt, ap); - va_end(ap); - - // Do not lock when getting the callback value, here and below. - // I suppose this is fine, since function cannot disappear in the - // same way string option can. - conn->request_info.log_message = buf; - if (call_user(conn, MG_EVENT_LOG) == NULL) { - fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL : - mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+"); - - if (fp != NULL) { - flockfile(fp); - timestamp = time(NULL); - - sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); - fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp, - src_addr); - - if (conn->request_info.request_method != NULL) { - fprintf(fp, "%s %s: ", conn->request_info.request_method, - conn->request_info.uri); - } - - (void) fprintf(fp, "%s", buf); - fputc('\n', fp); - funlockfile(fp); - if (fp != stderr) { - fclose(fp); - } - } - } - conn->request_info.log_message = NULL; -} - -// Return OpenSSL error message -static const char *ssl_error(void) { - unsigned long err; - err = ERR_get_error(); - return err == 0 ? "" : ERR_error_string(err, NULL); -} - -// Return fake connection structure. Used for logging, if connection -// is not applicable at the moment of logging. -static struct mg_connection *fc(struct mg_context *ctx) { - static struct mg_connection fake_connection; - fake_connection.ctx = ctx; - return &fake_connection; -} - -const char *mg_version(void) { - return MONGOOSE_VERSION; -} - -static void mg_strlcpy(register char *dst, register const char *src, size_t n) { - for (; *src != '\0' && n > 1; n--) { - *dst++ = *src++; - } - *dst = '\0'; -} - -static int lowercase(const char *s) { - return tolower(* (const unsigned char *) s); -} - -static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { - int diff = 0; - - if (len > 0) - do { - diff = lowercase(s1++) - lowercase(s2++); - } while (diff == 0 && s1[-1] != '\0' && --len > 0); - - return diff; -} - -static int mg_strcasecmp(const char *s1, const char *s2) { - int diff; - - do { - diff = lowercase(s1++) - lowercase(s2++); - } while (diff == 0 && s1[-1] != '\0'); - - return diff; -} - -static char * mg_strndup(const char *ptr, size_t len) { - char *p; - - if ((p = (char *) malloc(len + 1)) != NULL) { - mg_strlcpy(p, ptr, len + 1); - } - - return p; -} - -static char * mg_strdup(const char *str) { - return mg_strndup(str, strlen(str)); -} - -// Like snprintf(), but never returns negative value, or the value -// that is larger than a supplied buffer. -// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability -// in his audit report. -static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen, - const char *fmt, va_list ap) { - int n; - - if (buflen == 0) - return 0; - - n = vsnprintf(buf, buflen, fmt, ap); - - if (n < 0) { - cry(conn, "vsnprintf error"); - n = 0; - } else if (n >= (int) buflen) { - cry(conn, "truncating vsnprintf buffer: [%.*s]", - n > 200 ? 200 : n, buf); - n = (int) buflen - 1; - } - buf[n] = '\0'; - - return n; -} - -static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, - const char *fmt, ...) { - va_list ap; - int n; - - va_start(ap, fmt); - n = mg_vsnprintf(conn, buf, buflen, fmt, ap); - va_end(ap); - - return n; -} - -// Skip the characters until one of the delimiters characters found. -// 0-terminate resulting word. Skip the delimiter and following whitespaces if any. -// Advance pointer to buffer to the next word. Return found 0-terminated word. -// Delimiters can be quoted with quotechar. -static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) { - char *p, *begin_word, *end_word, *end_whitespace; - - begin_word = *buf; - end_word = begin_word + strcspn(begin_word, delimiters); - - // Check for quotechar - if (end_word > begin_word) { - p = end_word - 1; - while (*p == quotechar) { - // If there is anything beyond end_word, copy it - if (*end_word == '\0') { - *p = '\0'; - break; - } else { - size_t end_off = strcspn(end_word + 1, delimiters); - memmove (p, end_word, end_off + 1); - p += end_off; // p must correspond to end_word - 1 - end_word += end_off + 1; - } - } - for (p++; p < end_word; p++) { - *p = '\0'; - } - } - - if (*end_word == '\0') { - *buf = end_word; - } else { - end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace); - - for (p = end_word; p < end_whitespace; p++) { - *p = '\0'; - } - - *buf = end_whitespace; - } - - return begin_word; -} - -// Simplified version of skip_quoted without quote char -// and whitespace == delimiters -static char *skip(char **buf, const char *delimiters) { - return skip_quoted(buf, delimiters, delimiters, 0); -} - - -// Return HTTP header value, or NULL if not found. -static const char *get_header(const struct mg_request_info *ri, - const char *name) { - int i; - - for (i = 0; i < ri->num_headers; i++) - if (!mg_strcasecmp(name, ri->http_headers[i].name)) - return ri->http_headers[i].value; - - return NULL; -} - -const char *mg_get_header(const struct mg_connection *conn, const char *name) { - return get_header(&conn->request_info, name); -} - -// A helper function for traversing comma separated list of values. -// It returns a list pointer shifted to the next value, of NULL if the end -// of the list found. -// Value is stored in val vector. If value has form "x=y", then eq_val -// vector is initialized to point to the "y" part, and val vector length -// is adjusted to point only to "x". -static const char *next_option(const char *list, struct vec *val, - struct vec *eq_val) { - if (list == NULL || *list == '\0') { - // End of the list - list = NULL; - } else { - val->ptr = list; - if ((list = strchr(val->ptr, ',')) != NULL) { - // Comma found. Store length and shift the list ptr - val->len = list - val->ptr; - list++; - } else { - // This value is the last one - list = val->ptr + strlen(val->ptr); - val->len = list - val->ptr; - } - - if (eq_val != NULL) { - // Value has form "x=y", adjust pointers and lengths - // so that val points to "x", and eq_val points to "y". - eq_val->len = 0; - eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); - if (eq_val->ptr != NULL) { - eq_val->ptr++; // Skip over '=' character - eq_val->len = val->ptr + val->len - eq_val->ptr; - val->len = (eq_val->ptr - val->ptr) - 1; - } - } - } - - return list; -} - -static int match_prefix(const char *pattern, int pattern_len, const char *str) { - const char *or_str; - int i, j, len, res; - - if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { - res = match_prefix(pattern, or_str - pattern, str); - return res > 0 ? res : - match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); - } - - i = j = 0; - res = -1; - for (; i < pattern_len; i++, j++) { - if (pattern[i] == '?' && str[j] != '\0') { - continue; - } else if (pattern[i] == '$') { - return str[j] == '\0' ? j : -1; - } else if (pattern[i] == '*') { - i++; - if (pattern[i] == '*') { - i++; - len = strlen(str + j); - } else { - len = strcspn(str + j, "/"); - } - if (i == pattern_len) { - return j + len; - } - do { - res = match_prefix(pattern + i, pattern_len - i, str + j + len); - } while (res == -1 && len-- > 0); - return res == -1 ? -1 : j + res + len; - } else if (pattern[i] != str[j]) { - return -1; - } - } - return j; -} - -// HTTP 1.1 assumes keep alive if "Connection:" header is not set -// This function must tolerate situations when connection info is not -// set up, for example if request parsing failed. -static int should_keep_alive(const struct mg_connection *conn) { - const char *http_version = conn->request_info.http_version; - const char *header = mg_get_header(conn, "Connection"); - return (!conn->must_close && - !conn->request_info.status_code != 401 && - !mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") && - (header == NULL && http_version && !strcmp(http_version, "1.1"))) || - (header != NULL && !mg_strcasecmp(header, "keep-alive")); -} - -static const char *suggest_connection_header(const struct mg_connection *conn) { - return should_keep_alive(conn) ? "keep-alive" : "close"; -} - -static void send_http_error(struct mg_connection *conn, int status, - const char *reason, const char *fmt, ...) { - char buf[BUFSIZ]; - va_list ap; - int len; - - conn->request_info.status_code = status; - - if (call_user(conn, MG_HTTP_ERROR) == NULL) { - buf[0] = '\0'; - len = 0; - - // Errors 1xx, 204 and 304 MUST NOT send a body - if (status > 199 && status != 204 && status != 304) { - len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason); - cry(conn, "%s", buf); - buf[len++] = '\n'; - - va_start(ap, fmt); - len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); - va_end(ap); - } - DEBUG_TRACE(("[%s]", buf)); - - mg_printf(conn, "HTTP/1.1 %d %s\r\n" - "Content-Type: text/plain\r\n" - "Content-Length: %d\r\n" - "Connection: %s\r\n\r\n", status, reason, len, - suggest_connection_header(conn)); - conn->num_bytes_sent += mg_printf(conn, "%s", buf); - } -} - -#if defined(_WIN32) && !defined(__SYMBIAN32__) -static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) { - unused = NULL; - *mutex = CreateMutex(NULL, FALSE, NULL); - return *mutex == NULL ? -1 : 0; -} - -static int pthread_mutex_destroy(pthread_mutex_t *mutex) { - return CloseHandle(*mutex) == 0 ? -1 : 0; -} - -static int pthread_mutex_lock(pthread_mutex_t *mutex) { - return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; -} - -static int pthread_mutex_unlock(pthread_mutex_t *mutex) { - return ReleaseMutex(*mutex) == 0 ? -1 : 0; -} - -static int pthread_cond_init(pthread_cond_t *cv, const void *unused) { - unused = NULL; - cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL); - cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL); - return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1; -} - -static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) { - HANDLE handles[] = {cv->signal, cv->broadcast}; - ReleaseMutex(*mutex); - WaitForMultipleObjects(2, handles, FALSE, INFINITE); - return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; -} - -static int pthread_cond_signal(pthread_cond_t *cv) { - return SetEvent(cv->signal) == 0 ? -1 : 0; -} - -static int pthread_cond_broadcast(pthread_cond_t *cv) { - // Implementation with PulseEvent() has race condition, see - // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html - return PulseEvent(cv->broadcast) == 0 ? -1 : 0; -} - -static int pthread_cond_destroy(pthread_cond_t *cv) { - return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1; -} - -// For Windows, change all slashes to backslashes in path names. -static void change_slashes_to_backslashes(char *path) { - int i; - - for (i = 0; path[i] != '\0'; i++) { - if (path[i] == '/') - path[i] = '\\'; - // i > 0 check is to preserve UNC paths, like \\server\file.txt - if (path[i] == '\\' && i > 0) - while (path[i + 1] == '\\' || path[i + 1] == '/') - (void) memmove(path + i + 1, - path + i + 2, strlen(path + i + 1)); - } -} - -// Encode 'path' which is assumed UTF-8 string, into UNICODE string. -// wbuf and wbuf_len is a target buffer and its length. -static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) { - char buf[PATH_MAX], buf2[PATH_MAX], *p; - - mg_strlcpy(buf, path, sizeof(buf)); - change_slashes_to_backslashes(buf); - - // Point p to the end of the file name - p = buf + strlen(buf) - 1; - - // Trim trailing backslash character - while (p > buf && *p == '\\' && p[-1] != ':') { - *p-- = '\0'; - } - - // Protect from CGI code disclosure. - // This is very nasty hole. Windows happily opens files with - // some garbage in the end of file name. So fopen("a.cgi ", "r") - // actually opens "a.cgi", and does not return an error! - if (*p == 0x20 || // No space at the end - (*p == 0x2e && p > buf) || // No '.' but allow '.' as full path - *p == 0x2b || // No '+' - (*p & ~0x7f)) { // And generally no non-ascii chars - (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf); - wbuf[0] = L'\0'; - } else { - // Convert to Unicode and back. If doubly-converted string does not - // match the original, something is fishy, reject. - memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); - MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); - WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), - NULL, NULL); - if (strcmp(buf, buf2) != 0) { - wbuf[0] = L'\0'; - } - } -} - -#if defined(_WIN32_WCE) -static time_t time(time_t *ptime) { - time_t t; - SYSTEMTIME st; - FILETIME ft; - - GetSystemTime(&st); - SystemTimeToFileTime(&st, &ft); - t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); - - if (ptime != NULL) { - *ptime = t; - } - - return t; -} - -static struct tm *localtime(const time_t *ptime, struct tm *ptm) { - int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF; - FILETIME ft, lft; - SYSTEMTIME st; - TIME_ZONE_INFORMATION tzinfo; - - if (ptm == NULL) { - return NULL; - } - - * (int64_t *) &ft = t; - FileTimeToLocalFileTime(&ft, &lft); - FileTimeToSystemTime(&lft, &st); - ptm->tm_year = st.wYear - 1900; - ptm->tm_mon = st.wMonth - 1; - ptm->tm_wday = st.wDayOfWeek; - ptm->tm_mday = st.wDay; - ptm->tm_hour = st.wHour; - ptm->tm_min = st.wMinute; - ptm->tm_sec = st.wSecond; - ptm->tm_yday = 0; // hope nobody uses this - ptm->tm_isdst = - GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0; - - return ptm; -} - -static struct tm *gmtime(const time_t *ptime, struct tm *ptm) { - // FIXME(lsm): fix this. - return localtime(ptime, ptm); -} - -static size_t strftime(char *dst, size_t dst_size, const char *fmt, - const struct tm *tm) { - (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); - return 0; -} -#endif - -static int mg_rename(const char* oldname, const char* newname) { - wchar_t woldbuf[PATH_MAX]; - wchar_t wnewbuf[PATH_MAX]; - - to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf)); - to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf)); - - return MoveFileW(woldbuf, wnewbuf) ? 0 : -1; -} - - -static FILE *mg_fopen(const char *path, const char *mode) { - wchar_t wbuf[PATH_MAX], wmode[20]; - - to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); - MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); - - return _wfopen(wbuf, wmode); -} - -static int mg_stat(const char *path, struct mgstat *stp) { - int ok = -1; // Error - wchar_t wbuf[PATH_MAX]; - WIN32_FILE_ATTRIBUTE_DATA info; - - to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); - - if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { - stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); - stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime, - info.ftLastWriteTime.dwHighDateTime); - stp->is_directory = - info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; - ok = 0; // Success - } - - return ok; -} - -static int mg_remove(const char *path) { - wchar_t wbuf[PATH_MAX]; - to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); - return DeleteFileW(wbuf) ? 0 : -1; -} - -static int mg_mkdir(const char *path, int mode) { - char buf[PATH_MAX]; - wchar_t wbuf[PATH_MAX]; - - mode = 0; // Unused - mg_strlcpy(buf, path, sizeof(buf)); - change_slashes_to_backslashes(buf); - - (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf)); - - return CreateDirectoryW(wbuf, NULL) ? 0 : -1; -} - -// Implementation of POSIX opendir/closedir/readdir for Windows. -static DIR * opendir(const char *name) { - DIR *dir = NULL; - wchar_t wpath[PATH_MAX]; - DWORD attrs; - - if (name == NULL) { - SetLastError(ERROR_BAD_ARGUMENTS); - } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { - SetLastError(ERROR_NOT_ENOUGH_MEMORY); - } else { - to_unicode(name, wpath, ARRAY_SIZE(wpath)); - attrs = GetFileAttributesW(wpath); - if (attrs != 0xFFFFFFFF && - ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { - (void) wcscat(wpath, L"\\*"); - dir->handle = FindFirstFileW(wpath, &dir->info); - dir->result.d_name[0] = '\0'; - } else { - free(dir); - dir = NULL; - } - } - - return dir; -} - -static int closedir(DIR *dir) { - int result = 0; - - if (dir != NULL) { - if (dir->handle != INVALID_HANDLE_VALUE) - result = FindClose(dir->handle) ? 0 : -1; - - free(dir); - } else { - result = -1; - SetLastError(ERROR_BAD_ARGUMENTS); - } - - return result; -} - -struct dirent * readdir(DIR *dir) { - struct dirent *result = 0; - - if (dir) { - if (dir->handle != INVALID_HANDLE_VALUE) { - result = &dir->result; - (void) WideCharToMultiByte(CP_UTF8, 0, - dir->info.cFileName, -1, result->d_name, - sizeof(result->d_name), NULL, NULL); - - if (!FindNextFileW(dir->handle, &dir->info)) { - (void) FindClose(dir->handle); - dir->handle = INVALID_HANDLE_VALUE; - } - - } else { - SetLastError(ERROR_FILE_NOT_FOUND); - } - } else { - SetLastError(ERROR_BAD_ARGUMENTS); - } - - return result; -} - -#define set_close_on_exec(fd) // No FD_CLOEXEC on Windows - -static int start_thread(struct mg_context *ctx, mg_thread_func_t f, void *p) { - return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0; -} - -static HANDLE dlopen(const char *dll_name, int flags) { - wchar_t wbuf[PATH_MAX]; - flags = 0; // Unused - to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); - return LoadLibraryW(wbuf); -} - -#if !defined(NO_CGI) -#define SIGKILL 0 -static int kill(pid_t pid, int sig_num) { - (void) TerminateProcess(pid, sig_num); - (void) CloseHandle(pid); - return 0; -} - -static pid_t spawn_process(struct mg_connection *conn, const char *prog, - char *envblk, char *envp[], int fd_stdin, - int fd_stdout, const char *dir) { - HANDLE me; - char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX]; - FILE *fp; - STARTUPINFOA si = { sizeof(si) }; - PROCESS_INFORMATION pi = { 0 }; - - envp = NULL; // Unused - - // TODO(lsm): redirect CGI errors to the error log file - si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; - si.wShowWindow = SW_HIDE; - - me = GetCurrentProcess(); - (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me, - &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); - (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me, - &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); - - // If CGI file is a script, try to read the interpreter line - interp = conn->ctx->config[CGI_INTERPRETER]; - if (interp == NULL) { - buf[2] = '\0'; - mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%c%s", dir, DIRSEP, prog); - if ((fp = fopen(cmdline, "r")) != NULL) { - (void) fgets(buf, sizeof(buf), fp); - if (buf[0] != '#' || buf[1] != '!') { - // First line does not start with "#!". Do not set interpreter. - buf[2] = '\0'; - } else { - // Trim whitespaces in interpreter name - for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) { - *p = '\0'; - } - } - (void) fclose(fp); - } - interp = buf + 2; - } - - (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s", - interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog); - - DEBUG_TRACE(("Running [%s]", cmdline)); - if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, - CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) { - cry(conn, "%s: CreateProcess(%s): %d", - __func__, cmdline, ERRNO); - pi.hProcess = (pid_t) -1; - } else { - (void) close(fd_stdin); - (void) close(fd_stdout); - } - - (void) CloseHandle(si.hStdOutput); - (void) CloseHandle(si.hStdInput); - (void) CloseHandle(pi.hThread); - - return (pid_t) pi.hProcess; -} -#endif // !NO_CGI - -static int set_non_blocking_mode(SOCKET sock) { - unsigned long on = 1; - return ioctlsocket(sock, FIONBIO, &on); -} - -#else -static int mg_stat(const char *path, struct mgstat *stp) { - struct stat st; - int ok; - - if (stat(path, &st) == 0) { - ok = 0; - stp->size = st.st_size; - stp->mtime = st.st_mtime; - stp->is_directory = S_ISDIR(st.st_mode); - } else { - ok = -1; - } - - return ok; -} - -static void set_close_on_exec(int fd) { - (void) fcntl(fd, F_SETFD, FD_CLOEXEC); -} - -static int start_thread(struct mg_context *ctx, mg_thread_func_t func, - void *param) { - pthread_t thread_id; - pthread_attr_t attr; - int retval; - - (void) pthread_attr_init(&attr); - (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); - // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled - // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5); - - if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) { - cry(fc(ctx), "%s: %s", __func__, strerror(retval)); - } - - return retval; -} - -#ifndef NO_CGI -static pid_t spawn_process(struct mg_connection *conn, const char *prog, - char *envblk, char *envp[], int fd_stdin, - int fd_stdout, const char *dir) { - pid_t pid; - const char *interp; - - envblk = NULL; // Unused - - if ((pid = fork()) == -1) { - // Parent - send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO)); - } else if (pid == 0) { - // Child - if (chdir(dir) != 0) { - cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); - } else if (dup2(fd_stdin, 0) == -1) { - cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO)); - } else if (dup2(fd_stdout, 1) == -1) { - cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO)); - } else { - (void) dup2(fd_stdout, 2); - (void) close(fd_stdin); - (void) close(fd_stdout); - - // Execute CGI program. No need to lock: new process - interp = conn->ctx->config[CGI_INTERPRETER]; - if (interp == NULL) { - (void) execle(prog, prog, NULL, envp); - cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); - } else { - (void) execle(interp, interp, prog, NULL, envp); - cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog, - strerror(ERRNO)); - } - } - exit(EXIT_FAILURE); - } else { - // Parent. Close stdio descriptors - (void) close(fd_stdin); - (void) close(fd_stdout); - } - - return pid; -} -#endif // !NO_CGI - -static int set_non_blocking_mode(SOCKET sock) { - int flags; - - flags = fcntl(sock, F_GETFL, 0); - (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK); - - return 0; -} -#endif // _WIN32 - -// Write data to the IO channel - opened file descriptor, socket or SSL -// descriptor. Return number of bytes written. -static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, - int64_t len) { - int64_t sent; - int n, k; - - sent = 0; - while (sent < len) { - - // How many bytes we send in this iteration - k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); - - if (ssl != NULL) { - n = SSL_write(ssl, buf + sent, k); - } else if (fp != NULL) { - n = fwrite(buf + sent, 1, (size_t) k, fp); - if (ferror(fp)) - n = -1; - } else { - n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL); - } - - if (n < 0) - break; - - sent += n; - } - - return sent; -} - -// Read from IO channel - opened file descriptor, socket, or SSL descriptor. -// Return number of bytes read. -static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) { - int nread; - - if (ssl != NULL) { - nread = SSL_read(ssl, buf, len); - } else if (fp != NULL) { - // Use read() instead of fread(), because if we're reading from the CGI - // pipe, fread() may block until IO buffer is filled up. We cannot afford - // to block and must pass all read bytes immediately to the client. - nread = read(fileno(fp), buf, (size_t) len); - if (ferror(fp)) - nread = -1; - } else { - nread = recv(sock, buf, (size_t) len, 0); - } - - return nread; -} - -int mg_read(struct mg_connection *conn, void *buf, size_t len) { - int n, buffered_len, nread; - const char *buffered; - - assert((conn->content_len == -1 && conn->consumed_content == 0) || - conn->consumed_content <= conn->content_len); - DEBUG_TRACE(("%p %zu %lld %lld", buf, len, - conn->content_len, conn->consumed_content)); - nread = 0; - if (conn->consumed_content < conn->content_len) { - - // Adjust number of bytes to read. - int64_t to_read = conn->content_len - conn->consumed_content; - if (to_read < (int64_t) len) { - len = (int) to_read; - } - - // How many bytes of data we have buffered in the request buffer? - buffered = conn->buf + conn->request_len + conn->consumed_content; - buffered_len = conn->data_len - conn->request_len; - assert(buffered_len >= 0); - - // Return buffered data back if we haven't done that yet. - if (conn->consumed_content < (int64_t) buffered_len) { - buffered_len -= (int) conn->consumed_content; - if (len < (size_t) buffered_len) { - buffered_len = len; - } - memcpy(buf, buffered, (size_t)buffered_len); - len -= buffered_len; - buf = (char *) buf + buffered_len; - conn->consumed_content += buffered_len; - nread = buffered_len; - } - - // We have returned all buffered data. Read new data from the remote socket. - while (len > 0) { - n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len); - if (n <= 0) { - break; - } - buf = (char *) buf + n; - conn->consumed_content += n; - nread += n; - len -= n; - } - } - return nread; -} - -int mg_write(struct mg_connection *conn, const void *buf, size_t len) { - return (int) push(NULL, conn->client.sock, conn->ssl, (const char *) buf, - (int64_t) len); -} - -int mg_printf(struct mg_connection *conn, const char *fmt, ...) { - char buf[BUFSIZ]; - int len; - va_list ap; - - va_start(ap, fmt); - len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap); - va_end(ap); - - return mg_write(conn, buf, (size_t)len); -} - -// URL-decode input buffer into destination buffer. -// 0-terminate the destination buffer. Return the length of decoded data. -// form-url-encoded data differs from URI encoding in a way that it -// uses '+' as character for space, see RFC 1866 section 8.2.1 -// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt -static size_t url_decode(const char *src, size_t src_len, char *dst, - size_t dst_len, int is_form_url_encoded) { - size_t i, j; - int a, b; -#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') - - for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { - if (src[i] == '%' && - isxdigit(* (const unsigned char *) (src + i + 1)) && - isxdigit(* (const unsigned char *) (src + i + 2))) { - a = tolower(* (const unsigned char *) (src + i + 1)); - b = tolower(* (const unsigned char *) (src + i + 2)); - dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); - i += 2; - } else if (is_form_url_encoded && src[i] == '+') { - dst[j] = ' '; - } else { - dst[j] = src[i]; - } - } - - dst[j] = '\0'; // Null-terminate the destination - - return j; -} - -// Scan given buffer and fetch the value of the given variable. -// It can be specified in query string, or in the POST data. -// Return NULL if the variable not found, or allocated 0-terminated value. -// It is caller's responsibility to free the returned value. -int mg_get_var(const char *buf, size_t buf_len, const char *name, - char *dst, size_t dst_len) { - const char *p, *e, *s; - size_t name_len, len; - - name_len = strlen(name); - e = buf + buf_len; - len = -1; - dst[0] = '\0'; - - // buf is "var1=val1&var2=val2...". Find variable first - for (p = buf; p != NULL && p + name_len < e; p++) { - if ((p == buf || p[-1] == '&') && p[name_len] == '=' && - !mg_strncasecmp(name, p, name_len)) { - - // Point p to variable value - p += name_len + 1; - - // Point s to the end of the value - s = (const char *) memchr(p, '&', (size_t)(e - p)); - if (s == NULL) { - s = e; - } - assert(s >= p); - - // Decode variable into destination buffer - if ((size_t) (s - p) < dst_len) { - len = url_decode(p, (size_t)(s - p), dst, dst_len, 1); - } - break; - } - } - - return len; -} - -int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name, - char *dst, size_t dst_size) { - const char *s, *p, *end; - int name_len, len = -1; - - dst[0] = '\0'; - if ((s = mg_get_header(conn, "Cookie")) == NULL) { - return 0; - } - - name_len = strlen(cookie_name); - end = s + strlen(s); - - for (; (s = strstr(s, cookie_name)) != NULL; s += name_len) - if (s[name_len] == '=') { - s += name_len + 1; - if ((p = strchr(s, ' ')) == NULL) - p = end; - if (p[-1] == ';') - p--; - if (*s == '"' && p[-1] == '"' && p > s + 1) { - s++; - p--; - } - if ((size_t) (p - s) < dst_size) { - len = (p - s) + 1; - mg_strlcpy(dst, s, (size_t)len); - } - break; - } - - return len; -} - -static int convert_uri_to_file_name(struct mg_connection *conn, char *buf, - size_t buf_len, struct mgstat *st) { - struct vec a, b; - const char *rewrite, *uri = conn->request_info.uri; - char *p; - int match_len, stat_result; - - buf_len--; // This is because memmove() for PATH_INFO may shift part - // of the path one byte on the right. - mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT], - uri); - - rewrite = conn->ctx->config[REWRITE]; - while ((rewrite = next_option(rewrite, &a, &b)) != NULL) { - if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) { - mg_snprintf(conn, buf, buf_len, "%.*s%s", b.len, b.ptr, uri + match_len); - break; - } - } - -#if defined(_WIN32) && !defined(__SYMBIAN32__) - //change_slashes_to_backslashes(buf); -#endif // _WIN32 - - if ((stat_result = mg_stat(buf, st)) != 0) { - // Support PATH_INFO for CGI scripts. - for (p = buf + strlen(buf); p > buf + 1; p--) { - if (*p == '/') { - *p = '\0'; - if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], - strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 && - (stat_result = mg_stat(buf, st)) == 0) { - // Shift PATH_INFO block one character right, e.g. - // "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00" - // conn->path_info is pointing to the local variable "path" declared - // in handle_request(), so PATH_INFO not valid after - // handle_request returns. - conn->path_info = p + 1; - memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0 - p[1] = '/'; - break; - } else { - *p = '/'; - stat_result = -1; - } - } - } - } - - return stat_result; -} - -static int sslize(struct mg_connection *conn, int (*func)(SSL *)) { - return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL && - SSL_set_fd(conn->ssl, conn->client.sock) == 1 && - func(conn->ssl) == 1; -} - -// Check whether full request is buffered. Return: -// -1 if request is malformed -// 0 if request is not yet fully buffered -// >0 actual request length, including last \r\n\r\n -static int get_request_len(const char *buf, int buflen) { - const char *s, *e; - int len = 0; - - DEBUG_TRACE(("buf: %p, len: %d", buf, buflen)); - for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) - // Control characters are not allowed but >=128 is. - if (!isprint(* (const unsigned char *) s) && *s != '\r' && - *s != '\n' && * (const unsigned char *) s < 128) { - len = -1; - } else if (s[0] == '\n' && s[1] == '\n') { - len = (int) (s - buf) + 2; - } else if (s[0] == '\n' && &s[1] < e && - s[1] == '\r' && s[2] == '\n') { - len = (int) (s - buf) + 3; - } - - return len; -} - -// Convert month to the month number. Return -1 on error, or month number -static int get_month_index(const char *s) { - size_t i; - - for (i = 0; i < ARRAY_SIZE(month_names); i++) - if (!strcmp(s, month_names[i])) - return (int) i; - - return -1; -} - -// Parse UTC date-time string, and return the corresponding time_t value. -static time_t parse_date_string(const char *datetime) { - static const unsigned short days_before_month[] = { - 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 - }; - char month_str[32]; - int second, minute, hour, day, month, year, leap_days, days; - time_t result = (time_t) 0; - - if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%d %3s %d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%d-%3s-%d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6)) && - year > 1970 && - (month = get_month_index(month_str)) != -1) { - year -= 1970; - leap_days = year / 4 - year / 100 + year / 400; - days = year * 365 + days_before_month[month] + (day - 1) + leap_days; - result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; - } - - return result; -} - -// Protect against directory disclosure attack by removing '..', -// excessive '/' and '\' characters -static void remove_double_dots_and_double_slashes(char *s) { - char *p = s; - - while (*s != '\0') { - *p++ = *s++; - if (IS_DIRSEP_CHAR(s[-1])) { - // Skip all following slashes and backslashes - while (IS_DIRSEP_CHAR(s[0])) { - s++; - } - - // Skip all double-dots - while (*s == '.' && s[1] == '.') { - s += 2; - } - } - } - *p = '\0'; -} - -static const struct { - const char *extension; - size_t ext_len; - const char *mime_type; - size_t mime_type_len; -} builtin_mime_types[] = { - {".html", 5, "text/html", 9}, - {".htm", 4, "text/html", 9}, - {".shtm", 5, "text/html", 9}, - {".shtml", 6, "text/html", 9}, - {".css", 4, "text/css", 8}, - {".js", 3, "application/x-javascript", 24}, - {".ico", 4, "image/x-icon", 12}, - {".gif", 4, "image/gif", 9}, - {".jpg", 4, "image/jpeg", 10}, - {".jpeg", 5, "image/jpeg", 10}, - {".png", 4, "image/png", 9}, - {".svg", 4, "image/svg+xml", 13}, - {".torrent", 8, "application/x-bittorrent", 24}, - {".wav", 4, "audio/x-wav", 11}, - {".mp3", 4, "audio/x-mp3", 11}, - {".mid", 4, "audio/mid", 9}, - {".m3u", 4, "audio/x-mpegurl", 15}, - {".ram", 4, "audio/x-pn-realaudio", 20}, - {".xml", 4, "text/xml", 8}, - {".xslt", 5, "application/xml", 15}, - {".ra", 3, "audio/x-pn-realaudio", 20}, - {".doc", 4, "application/msword", 19}, - {".exe", 4, "application/octet-stream", 24}, - {".zip", 4, "application/x-zip-compressed", 28}, - {".xls", 4, "application/excel", 17}, - {".tgz", 4, "application/x-tar-gz", 20}, - {".tar", 4, "application/x-tar", 17}, - {".gz", 3, "application/x-gunzip", 20}, - {".arj", 4, "application/x-arj-compressed", 28}, - {".rar", 4, "application/x-arj-compressed", 28}, - {".rtf", 4, "application/rtf", 15}, - {".pdf", 4, "application/pdf", 15}, - {".swf", 4, "application/x-shockwave-flash",29}, - {".mpg", 4, "video/mpeg", 10}, - {".mpeg", 5, "video/mpeg", 10}, - {".mp4", 4, "video/mp4", 9}, - {".m4v", 4, "video/x-m4v", 11}, - {".asf", 4, "video/x-ms-asf", 14}, - {".avi", 4, "video/x-msvideo", 15}, - {".bmp", 4, "image/bmp", 9}, - {NULL, 0, NULL, 0} -}; - -// Look at the "path" extension and figure what mime type it has. -// Store mime type in the vector. -static void get_mime_type(struct mg_context *ctx, const char *path, - struct vec *vec) { - struct vec ext_vec, mime_vec; - const char *list, *ext; - size_t i, path_len; - - path_len = strlen(path); - - // Scan user-defined mime types first, in case user wants to - // override default mime types. - list = ctx->config[EXTRA_MIME_TYPES]; - while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { - // ext now points to the path suffix - ext = path + path_len - ext_vec.len; - if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { - *vec = mime_vec; - return; - } - } - - // Now scan built-in mime types - for (i = 0; builtin_mime_types[i].extension != NULL; i++) { - ext = path + (path_len - builtin_mime_types[i].ext_len); - if (path_len > builtin_mime_types[i].ext_len && - mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) { - vec->ptr = builtin_mime_types[i].mime_type; - vec->len = builtin_mime_types[i].mime_type_len; - return; - } - } - - // Nothing found. Fall back to "text/plain" - vec->ptr = "text/plain"; - vec->len = 10; -} - -#ifndef HAVE_MD5 -typedef struct MD5Context { - uint32_t buf[4]; - uint32_t bits[2]; - unsigned char in[64]; -} MD5_CTX; - -#if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234) -#define byteReverse(buf, len) // Do nothing -#else -static void byteReverse(unsigned char *buf, unsigned longs) { - uint32_t t; - do { - t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | - ((unsigned) buf[1] << 8 | buf[0]); - *(uint32_t *) buf = t; - buf += 4; - } while (--longs); -} -#endif - -#define F1(x, y, z) (z ^ (x & (y ^ z))) -#define F2(x, y, z) F1(z, x, y) -#define F3(x, y, z) (x ^ y ^ z) -#define F4(x, y, z) (y ^ (x | ~z)) - -#define MD5STEP(f, w, x, y, z, data, s) \ - ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) - -// Start MD5 accumulation. Set bit count to 0 and buffer to mysterious -// initialization constants. -static void MD5Init(MD5_CTX *ctx) { - ctx->buf[0] = 0x67452301; - ctx->buf[1] = 0xefcdab89; - ctx->buf[2] = 0x98badcfe; - ctx->buf[3] = 0x10325476; - - ctx->bits[0] = 0; - ctx->bits[1] = 0; -} - -static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { - register uint32_t a, b, c, d; - - a = buf[0]; - b = buf[1]; - c = buf[2]; - d = buf[3]; - - MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); - MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); - MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); - MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); - MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); - MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); - MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); - MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); - MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); - MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); - MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); - MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); - MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); - MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); - MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); - MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); - - MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); - MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); - MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); - MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); - MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); - MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); - MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); - MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); - MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); - MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); - MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); - MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); - MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); - MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); - MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); - MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); - - MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); - MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); - MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); - MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); - MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); - MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); - MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); - MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); - MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); - MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); - MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); - MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); - MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); - MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); - MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); - MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); - - MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); - MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); - MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); - MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); - MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); - MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); - MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); - MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); - MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); - MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); - MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); - MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); - MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); - MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); - MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); - MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); - - buf[0] += a; - buf[1] += b; - buf[2] += c; - buf[3] += d; -} - -static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { - uint32_t t; - - t = ctx->bits[0]; - if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) - ctx->bits[1]++; - ctx->bits[1] += len >> 29; - - t = (t >> 3) & 0x3f; - - if (t) { - unsigned char *p = (unsigned char *) ctx->in + t; - - t = 64 - t; - if (len < t) { - memcpy(p, buf, len); - return; - } - memcpy(p, buf, t); - byteReverse(ctx->in, 16); - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - buf += t; - len -= t; - } - - while (len >= 64) { - memcpy(ctx->in, buf, 64); - byteReverse(ctx->in, 16); - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - buf += 64; - len -= 64; - } - - memcpy(ctx->in, buf, len); -} - -static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) { - unsigned count; - unsigned char *p; - - count = (ctx->bits[0] >> 3) & 0x3F; - - p = ctx->in + count; - *p++ = 0x80; - count = 64 - 1 - count; - if (count < 8) { - memset(p, 0, count); - byteReverse(ctx->in, 16); - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - memset(ctx->in, 0, 56); - } else { - memset(p, 0, count - 8); - } - byteReverse(ctx->in, 14); - - ((uint32_t *) ctx->in)[14] = ctx->bits[0]; - ((uint32_t *) ctx->in)[15] = ctx->bits[1]; - - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - byteReverse((unsigned char *) ctx->buf, 4); - memcpy(digest, ctx->buf, 16); - memset((char *) ctx, 0, sizeof(*ctx)); -} -#endif // !HAVE_MD5 - -// Stringify binary data. Output buffer must be twice as big as input, -// because each byte takes 2 bytes in string representation -static void bin2str(char *to, const unsigned char *p, size_t len) { - static const char *hex = "0123456789abcdef"; - - for (; len--; p++) { - *to++ = hex[p[0] >> 4]; - *to++ = hex[p[0] & 0x0f]; - } - *to = '\0'; -} - -// Return stringified MD5 hash for list of vectors. Buffer must be 33 bytes. -void mg_md5(char *buf, ...) { - unsigned char hash[16]; - const char *p; - va_list ap; - MD5_CTX ctx; - - MD5Init(&ctx); - - va_start(ap, buf); - while ((p = va_arg(ap, const char *)) != NULL) { - MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); - } - va_end(ap); - - MD5Final(hash, &ctx); - bin2str(buf, hash, sizeof(hash)); -} - -// Check the user's password, return 1 if OK -static int check_password(const char *method, const char *ha1, const char *uri, - const char *nonce, const char *nc, const char *cnonce, - const char *qop, const char *response) { - char ha2[32 + 1], expected_response[32 + 1]; - - // Some of the parameters may be NULL - if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL || - qop == NULL || response == NULL) { - return 0; - } - - // NOTE(lsm): due to a bug in MSIE, we do not compare the URI - // TODO(lsm): check for authentication timeout - if (// strcmp(dig->uri, c->ouri) != 0 || - strlen(response) != 32 - // || now - strtoul(dig->nonce, NULL, 10) > 3600 - ) { - return 0; - } - - mg_md5(ha2, method, ":", uri, NULL); - mg_md5(expected_response, ha1, ":", nonce, ":", nc, - ":", cnonce, ":", qop, ":", ha2, NULL); - - return mg_strcasecmp(response, expected_response) == 0; -} - -// Use the global passwords file, if specified by auth_gpass option, -// or search for .htpasswd in the requested directory. -static FILE *open_auth_file(struct mg_connection *conn, const char *path) { - struct mg_context *ctx = conn->ctx; - char name[PATH_MAX]; - const char *p, *e; - struct mgstat st; - FILE *fp; - - if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) { - // Use global passwords file - fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r"); - if (fp == NULL) - cry(fc(ctx), "fopen(%s): %s", - ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO)); - } else if (!mg_stat(path, &st) && st.is_directory) { - (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s", - path, DIRSEP, PASSWORDS_FILE_NAME); - fp = mg_fopen(name, "r"); - } else { - // Try to find .htpasswd in requested directory. - for (p = path, e = p + strlen(p) - 1; e > p; e--) - if (IS_DIRSEP_CHAR(*e)) - break; - (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", - (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME); - fp = mg_fopen(name, "r"); - } - - return fp; -} - -// Parsed Authorization header -struct ah { - char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; -}; - -static int parse_auth_header(struct mg_connection *conn, char *buf, - size_t buf_size, struct ah *ah) { - char *name, *value, *s; - const char *auth_header; - - if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || - mg_strncasecmp(auth_header, "Digest ", 7) != 0) { - return 0; - } - - // Make modifiable copy of the auth header - (void) mg_strlcpy(buf, auth_header + 7, buf_size); - - s = buf; - (void) memset(ah, 0, sizeof(*ah)); - - // Parse authorization header - for (;;) { - // Gobble initial spaces - while (isspace(* (unsigned char *) s)) { - s++; - } - name = skip_quoted(&s, "=", " ", 0); - // Value is either quote-delimited, or ends at first comma or space. - if (s[0] == '\"') { - s++; - value = skip_quoted(&s, "\"", " ", '\\'); - if (s[0] == ',') { - s++; - } - } else { - value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces - } - if (*name == '\0') { - break; - } - - if (!strcmp(name, "username")) { - ah->user = value; - } else if (!strcmp(name, "cnonce")) { - ah->cnonce = value; - } else if (!strcmp(name, "response")) { - ah->response = value; - } else if (!strcmp(name, "uri")) { - ah->uri = value; - } else if (!strcmp(name, "qop")) { - ah->qop = value; - } else if (!strcmp(name, "nc")) { - ah->nc = value; - } else if (!strcmp(name, "nonce")) { - ah->nonce = value; - } - } - - // CGI needs it as REMOTE_USER - if (ah->user != NULL) { - conn->request_info.remote_user = mg_strdup(ah->user); - } else { - return 0; - } - - return 1; -} - -// Authorize against the opened passwords file. Return 1 if authorized. -static int authorize(struct mg_connection *conn, FILE *fp) { - struct ah ah; - char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ]; - - if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) { - return 0; - } - - // Loop over passwords file - while (fgets(line, sizeof(line), fp) != NULL) { - if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) { - continue; - } - - if (!strcmp(ah.user, f_user) && - !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain)) - return check_password( - conn->request_info.request_method, - ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop, - ah.response); - } - - return 0; -} - -// Return 1 if request is authorised, 0 otherwise. -static int check_authorization(struct mg_connection *conn, const char *path) { - FILE *fp; - char fname[PATH_MAX]; - struct vec uri_vec, filename_vec; - const char *list; - int authorized; - - fp = NULL; - authorized = 1; - - list = conn->ctx->config[PROTECT_URI]; - while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { - if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { - (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s", - filename_vec.len, filename_vec.ptr); - if ((fp = mg_fopen(fname, "r")) == NULL) { - cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno)); - } - break; - } - } - - if (fp == NULL) { - fp = open_auth_file(conn, path); - } - - if (fp != NULL) { - authorized = authorize(conn, fp); - (void) fclose(fp); - } - - return authorized; -} - -static void send_authorization_request(struct mg_connection *conn) { - conn->request_info.status_code = 401; - (void) mg_printf(conn, - "HTTP/1.1 401 Unauthorized\r\n" - "Content-Length: 0\r\n" - "WWW-Authenticate: Digest qop=\"auth\", " - "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", - conn->ctx->config[AUTHENTICATION_DOMAIN], - (unsigned long) time(NULL)); -} - -static int is_authorized_for_put(struct mg_connection *conn) { - FILE *fp; - int ret = 0; - - fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL : - mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r"); - - if (fp != NULL) { - ret = authorize(conn, fp); - (void) fclose(fp); - } - - return ret; -} - -int mg_modify_passwords_file(const char *fname, const char *domain, - const char *user, const char *pass) { - int found; - char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX]; - FILE *fp, *fp2; - - found = 0; - fp = fp2 = NULL; - - // Regard empty password as no password - remove user record. - if (pass != NULL && pass[0] == '\0') { - pass = NULL; - } - - (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); - - // Create the file if does not exist - if ((fp = mg_fopen(fname, "a+")) != NULL) { - (void) fclose(fp); - } - - // Open the given file and temporary file - if ((fp = mg_fopen(fname, "r")) == NULL) { - return 0; - } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) { - fclose(fp); - return 0; - } - - // Copy the stuff to temporary file - while (fgets(line, sizeof(line), fp) != NULL) { - if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) { - continue; - } - - if (!strcmp(u, user) && !strcmp(d, domain)) { - found++; - if (pass != NULL) { - mg_md5(ha1, user, ":", domain, ":", pass, NULL); - fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); - } - } else { - (void) fprintf(fp2, "%s", line); - } - } - - // If new user, just add it - if (!found && pass != NULL) { - mg_md5(ha1, user, ":", domain, ":", pass, NULL); - (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); - } - - // Close files - (void) fclose(fp); - (void) fclose(fp2); - - // Put the temp file in place of real file - (void) mg_remove(fname); - (void) mg_rename(tmp, fname); - - return 1; -} - -struct de { - struct mg_connection *conn; - char *file_name; - struct mgstat st; -}; - -static void url_encode(const char *src, char *dst, size_t dst_len) { - static const char *dont_escape = "._-$,;~()"; - static const char *hex = "0123456789abcdef"; - const char *end = dst + dst_len - 1; - - for (; *src != '\0' && dst < end; src++, dst++) { - if (isalnum(*(const unsigned char *) src) || - strchr(dont_escape, * (const unsigned char *) src) != NULL) { - *dst = *src; - } else if (dst + 2 < end) { - dst[0] = '%'; - dst[1] = hex[(* (const unsigned char *) src) >> 4]; - dst[2] = hex[(* (const unsigned char *) src) & 0xf]; - dst += 2; - } - } - - *dst = '\0'; -} - -static void print_dir_entry(struct de *de) { - char size[64], mod[64], href[PATH_MAX]; - - if (de->st.is_directory) { - (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]"); - } else { - // We use (signed) cast below because MSVC 6 compiler cannot - // convert unsigned __int64 to double. Sigh. - if (de->st.size < 1024) { - (void) mg_snprintf(de->conn, size, sizeof(size), - "%lu", (unsigned long) de->st.size); - } else if (de->st.size < 1024 * 1024) { - (void) mg_snprintf(de->conn, size, sizeof(size), - "%.1fk", (double) de->st.size / 1024.0); - } else if (de->st.size < 1024 * 1024 * 1024) { - (void) mg_snprintf(de->conn, size, sizeof(size), - "%.1fM", (double) de->st.size / 1048576); - } else { - (void) mg_snprintf(de->conn, size, sizeof(size), - "%.1fG", (double) de->st.size / 1073741824); - } - } - (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime)); - url_encode(de->file_name, href, sizeof(href)); - de->conn->num_bytes_sent += mg_printf(de->conn, - "%s%s" - " %s  %s\n", - de->conn->request_info.uri, href, de->st.is_directory ? "/" : "", - de->file_name, de->st.is_directory ? "/" : "", mod, size); -} - -// This function is called from send_directory() and used for -// sorting directory entries by size, or name, or modification time. -// On windows, __cdecl specification is needed in case if project is built -// with __stdcall convention. qsort always requires __cdels callback. -static int WINCDECL compare_dir_entries(const void *p1, const void *p2) { - const struct de *a = (const struct de *) p1, *b = (const struct de *) p2; - const char *query_string = a->conn->request_info.query_string; - int cmp_result = 0; - - if (query_string == NULL) { - query_string = "na"; - } - - if (a->st.is_directory && !b->st.is_directory) { - return -1; // Always put directories on top - } else if (!a->st.is_directory && b->st.is_directory) { - return 1; // Always put directories on top - } else if (*query_string == 'n') { - cmp_result = strcmp(a->file_name, b->file_name); - } else if (*query_string == 's') { - cmp_result = a->st.size == b->st.size ? 0 : - a->st.size > b->st.size ? 1 : -1; - } else if (*query_string == 'd') { - cmp_result = a->st.mtime == b->st.mtime ? 0 : - a->st.mtime > b->st.mtime ? 1 : -1; - } - - return query_string[1] == 'd' ? -cmp_result : cmp_result; -} - -static int scan_directory(struct mg_connection *conn, const char *dir, - void *data, void (*cb)(struct de *, void *)) { - char path[PATH_MAX]; - struct dirent *dp; - DIR *dirp; - struct de de; - - if ((dirp = opendir(dir)) == NULL) { - return 0; - } else { - de.conn = conn; - - while ((dp = readdir(dirp)) != NULL) { - // Do not show current dir and passwords file - if (!strcmp(dp->d_name, ".") || - !strcmp(dp->d_name, "..") || - !strcmp(dp->d_name, PASSWORDS_FILE_NAME)) - continue; - - mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name); - - // If we don't memset stat structure to zero, mtime will have - // garbage and strftime() will segfault later on in - // print_dir_entry(). memset is required only if mg_stat() - // fails. For more details, see - // http://code.google.com/p/mongoose/issues/detail?id=79 - if (mg_stat(path, &de.st) != 0) { - memset(&de.st, 0, sizeof(de.st)); - } - de.file_name = dp->d_name; - - cb(&de, data); - } - (void) closedir(dirp); - } - return 1; -} - -struct dir_scan_data { - struct de *entries; - int num_entries; - int arr_size; -}; - -static void dir_scan_callback(struct de *de, void *data) { - struct dir_scan_data *dsd = (struct dir_scan_data *) data; - - if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) { - dsd->arr_size *= 2; - dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size * - sizeof(dsd->entries[0])); - } - if (dsd->entries == NULL) { - // TODO(lsm): propagate an error to the caller - dsd->num_entries = 0; - } else { - dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name); - dsd->entries[dsd->num_entries].st = de->st; - dsd->entries[dsd->num_entries].conn = de->conn; - dsd->num_entries++; - } -} - -static void handle_directory_request(struct mg_connection *conn, - const char *dir) { - int i, sort_direction; - struct dir_scan_data data = { NULL, 0, 128 }; - - if (!scan_directory(conn, dir, &data, dir_scan_callback)) { - send_http_error(conn, 500, "Cannot open directory", - "Error: opendir(%s): %s", dir, strerror(ERRNO)); - return; - } - - sort_direction = conn->request_info.query_string != NULL && - conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; - - conn->must_close = 1; - mg_printf(conn, "%s", - "HTTP/1.1 200 OK\r\n" - "Connection: close\r\n" - "Content-Type: text/html; charset=utf-8\r\n\r\n"); - - conn->num_bytes_sent += mg_printf(conn, - "Index of %s" - "" - "

Index of %s

"
-      ""
-      ""
-      ""
-      "",
-      conn->request_info.uri, conn->request_info.uri,
-      sort_direction, sort_direction, sort_direction);
-
-  // Print first entry - link to a parent directory
-  conn->num_bytes_sent += mg_printf(conn,
-      ""
-      "\n",
-      conn->request_info.uri, "..", "Parent directory", "-", "-");
-
-  // Sort and print directory entries
-  qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
-        compare_dir_entries);
-  for (i = 0; i < data.num_entries; i++) {
-    print_dir_entry(&data.entries[i]);
-    free(data.entries[i].file_name);
-  }
-  free(data.entries);
-
-  conn->num_bytes_sent += mg_printf(conn, "%s", "
NameModifiedSize
%s %s  %s
");
-  conn->request_info.status_code = 200;
-}
-
-// Send len bytes from the opened file to the client.
-static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
-  char buf[BUFSIZ];
-  int to_read, num_read, num_written;
-
-  while (len > 0) {
-    // Calculate how much to read from the file in the buffer
-    to_read = sizeof(buf);
-    if ((int64_t) to_read > len)
-      to_read = (int) len;
-
-    // Read from file, exit the loop on error
-    if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
-      break;
-
-    // Send read bytes to the client, exit the loop on error
-    if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
-      break;
-
-    // Both read and were successful, adjust counters
-    conn->num_bytes_sent += num_written;
-    len -= num_written;
-  }
-}
-
-static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
-  return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
-}
-
-static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
-  strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
-}
-
-static void handle_file_request(struct mg_connection *conn, const char *path,
-                                struct mgstat *stp) {
-  char date[64], lm[64], etag[64], range[64];
-  const char *msg = "OK", *hdr;
-  time_t curtime = time(NULL);
-  int64_t cl, r1, r2;
-  struct vec mime_vec;
-  FILE *fp;
-  int n;
-
-  get_mime_type(conn->ctx, path, &mime_vec);
-  cl = stp->size;
-  conn->request_info.status_code = 200;
-  range[0] = '\0';
-
-  if ((fp = mg_fopen(path, "rb")) == NULL) {
-    send_http_error(conn, 500, http_500_error,
-        "fopen(%s): %s", path, strerror(ERRNO));
-    return;
-  }
-  set_close_on_exec(fileno(fp));
-
-  // If Range: header specified, act accordingly
-  r1 = r2 = 0;
-  hdr = mg_get_header(conn, "Range");
-  if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
-    conn->request_info.status_code = 206;
-    (void) fseeko(fp, (off_t) r1, SEEK_SET);
-    cl = n == 2 ? r2 - r1 + 1: cl - r1;
-    (void) mg_snprintf(conn, range, sizeof(range),
-        "Content-Range: bytes "
-        "%" INT64_FMT "-%"
-        INT64_FMT "/%" INT64_FMT "\r\n",
-        r1, r1 + cl - 1, stp->size);
-    msg = "Partial Content";
-  }
-
-  // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
-  // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
-  gmt_time_string(date, sizeof(date), &curtime);
-  gmt_time_string(lm, sizeof(lm), &stp->mtime);
-  (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
-      (unsigned long) stp->mtime, (unsigned long) stp->size);
-
-  (void) mg_printf(conn,
-      "HTTP/1.1 %d %s\r\n"
-      "Date: %s\r\n"
-      "Last-Modified: %s\r\n"
-      "Etag: \"%s\"\r\n"
-      "Content-Type: %.*s\r\n"
-      "Content-Length: %" INT64_FMT "\r\n"
-      "Connection: %s\r\n"
-      "Accept-Ranges: bytes\r\n"
-      "%s\r\n",
-      conn->request_info.status_code, msg, date, lm, etag, (int) mime_vec.len,
-      mime_vec.ptr, cl, suggest_connection_header(conn), range);
-
-  if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
-    send_file_data(conn, fp, cl);
-  }
-  (void) fclose(fp);
-}
-
-void mg_send_file(struct mg_connection *conn, const char *path) {
-  struct mgstat st;
-  if (mg_stat(path, &st) == 0) {
-    handle_file_request(conn, path, &st);
-  } else {
-    send_http_error(conn, 404, "Not Found", "%s", "File not found");
-  }
-}
-
-
-// Parse HTTP headers from the given buffer, advance buffer to the point
-// where parsing stopped.
-static void parse_http_headers(char **buf, struct mg_request_info *ri) {
-  int i;
-
-  for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
-    ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
-    ri->http_headers[i].value = skip(buf, "\r\n");
-    if (ri->http_headers[i].name[0] == '\0')
-      break;
-    ri->num_headers = i + 1;
-  }
-}
-
-static int is_valid_http_method(const char *method) {
-  return !strcmp(method, "GET") || !strcmp(method, "POST") ||
-    !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
-    !strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
-    !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
-}
-
-// Parse HTTP request, fill in mg_request_info structure.
-static int parse_http_request(char *buf, struct mg_request_info *ri) {
-  int status = 0;
-
-  // RFC says that all initial whitespaces should be ingored
-  while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
-    buf++;
-  }
-
-  ri->request_method = skip(&buf, " ");
-  ri->uri = skip(&buf, " ");
-  ri->http_version = skip(&buf, "\r\n");
-
-  if (is_valid_http_method(ri->request_method) &&
-      strncmp(ri->http_version, "HTTP/", 5) == 0) {
-    ri->http_version += 5;   // Skip "HTTP/"
-    parse_http_headers(&buf, ri);
-    status = 1;
-  }
-
-  return status;
-}
-
-// Keep reading the input (either opened file descriptor fd, or socket sock,
-// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
-// buffer (which marks the end of HTTP request). Buffer buf may already
-// have some data. The length of the data is stored in nread.
-// Upon every read operation, increase nread by the number of bytes read.
-static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
-                        int *nread) {
-  int n, request_len;
-
-  request_len = 0;
-  while (*nread < bufsiz && request_len == 0) {
-    n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread);
-    if (n <= 0) {
-      break;
-    } else {
-      *nread += n;
-      request_len = get_request_len(buf, *nread);
-    }
-  }
-
-  return request_len;
-}
-
-// For given directory path, substitute it to valid index file.
-// Return 0 if index file has been found, -1 if not found.
-// If the file is found, it's stats is returned in stp.
-static int substitute_index_file(struct mg_connection *conn, char *path,
-                                 size_t path_len, struct mgstat *stp) {
-  const char *list = conn->ctx->config[INDEX_FILES];
-  struct mgstat st;
-  struct vec filename_vec;
-  size_t n = strlen(path);
-  int found = 0;
-
-  // The 'path' given to us points to the directory. Remove all trailing
-  // directory separator characters from the end of the path, and
-  // then append single directory separator character.
-  while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
-    n--;
-  }
-  path[n] = DIRSEP;
-
-  // Traverse index files list. For each entry, append it to the given
-  // path and see if the file exists. If it exists, break the loop
-  while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
-
-    // Ignore too long entries that may overflow path buffer
-    if (filename_vec.len > path_len - (n + 2))
-      continue;
-
-    // Prepare full path to the index file
-    (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
-
-    // Does it exist?
-    if (mg_stat(path, &st) == 0) {
-      // Yes it does, break the loop
-      *stp = st;
-      found = 1;
-      break;
-    }
-  }
-
-  // If no index file exists, restore directory path
-  if (!found) {
-    path[n] = '\0';
-  }
-
-  return found;
-}
-
-// Return True if we should reply 304 Not Modified.
-static int is_not_modified(const struct mg_connection *conn,
-                           const struct mgstat *stp) {
-  const char *ims = mg_get_header(conn, "If-Modified-Since");
-  return ims != NULL && stp->mtime <= parse_date_string(ims);
-}
-
-static int forward_body_data(struct mg_connection *conn, FILE *fp,
-                             SOCKET sock, SSL *ssl) {
-  const char *expect, *buffered;
-  char buf[BUFSIZ];
-  int to_read, nread, buffered_len, success = 0;
-
-  expect = mg_get_header(conn, "Expect");
-  assert(fp != NULL);
-
-  if (conn->content_len == -1) {
-    send_http_error(conn, 411, "Length Required", "");
-  } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
-    send_http_error(conn, 417, "Expectation Failed", "");
-  } else {
-    if (expect != NULL) {
-      (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
-    }
-
-    buffered = conn->buf + conn->request_len;
-    buffered_len = conn->data_len - conn->request_len;
-    assert(buffered_len >= 0);
-    assert(conn->consumed_content == 0);
-
-    if (buffered_len > 0) {
-      if ((int64_t) buffered_len > conn->content_len) {
-        buffered_len = (int) conn->content_len;
-      }
-      push(fp, sock, ssl, buffered, (int64_t) buffered_len);
-      conn->consumed_content += buffered_len;
-    }
-
-    while (conn->consumed_content < conn->content_len) {
-      to_read = sizeof(buf);
-      if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
-        to_read = (int) (conn->content_len - conn->consumed_content);
-      }
-      nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
-      if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
-        break;
-      }
-      conn->consumed_content += nread;
-    }
-
-    if (conn->consumed_content == conn->content_len) {
-      success = 1;
-    }
-
-    // Each error code path in this function must send an error
-    if (!success) {
-      send_http_error(conn, 577, http_500_error, "");
-    }
-  }
-
-  return success;
-}
-
-#if !defined(NO_CGI)
-// This structure helps to create an environment for the spawned CGI program.
-// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
-// last element must be NULL.
-// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
-// strings must reside in a contiguous buffer. The end of the buffer is
-// marked by two '\0' characters.
-// We satisfy both worlds: we create an envp array (which is vars), all
-// entries are actually pointers inside buf.
-struct cgi_env_block {
-  struct mg_connection *conn;
-  char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
-  int len; // Space taken
-  char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
-  int nvars; // Number of variables
-};
-
-// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
-// pointer into the vars array.
-static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
-  int n, space;
-  char *added;
-  va_list ap;
-
-  // Calculate how much space is left in the buffer
-  space = sizeof(block->buf) - block->len - 2;
-  assert(space >= 0);
-
-  // Make a pointer to the free space int the buffer
-  added = block->buf + block->len;
-
-  // Copy VARIABLE=VALUE\0 string into the free space
-  va_start(ap, fmt);
-  n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
-  va_end(ap);
-
-  // Make sure we do not overflow buffer and the envp array
-  if (n > 0 && n < space &&
-      block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
-    // Append a pointer to the added string into the envp array
-    block->vars[block->nvars++] = block->buf + block->len;
-    // Bump up used length counter. Include \0 terminator
-    block->len += n + 1;
-  }
-
-  return added;
-}
-
-static void prepare_cgi_environment(struct mg_connection *conn,
-                                    const char *prog,
-                                    struct cgi_env_block *blk) {
-  const char *s, *slash;
-  struct vec var_vec;
-  char *p, src_addr[20];
-  int  i;
-
-  blk->len = blk->nvars = 0;
-  blk->conn = conn;
-  sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
-
-  addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
-  addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
-  addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
-
-  // Prepare the environment block
-  addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
-  addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
-  addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
-
-  // TODO(lsm): fix this for IPv6 case
-  addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
-
-  addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
-  addenv(blk, "REMOTE_ADDR=%s", src_addr);
-  addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
-  addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
-
-  // SCRIPT_NAME
-  assert(conn->request_info.uri[0] == '/');
-  slash = strrchr(conn->request_info.uri, '/');
-  if ((s = strrchr(prog, '/')) == NULL)
-    s = prog;
-  addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
-         conn->request_info.uri, s);
-
-  addenv(blk, "SCRIPT_FILENAME=%s", prog);
-  addenv(blk, "PATH_TRANSLATED=%s", prog);
-  addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
-
-  if ((s = mg_get_header(conn, "Content-Type")) != NULL)
-    addenv(blk, "CONTENT_TYPE=%s", s);
-
-  if (conn->request_info.query_string != NULL)
-    addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
-
-  if ((s = mg_get_header(conn, "Content-Length")) != NULL)
-    addenv(blk, "CONTENT_LENGTH=%s", s);
-
-  if ((s = getenv("PATH")) != NULL)
-    addenv(blk, "PATH=%s", s);
-
-  if (conn->path_info != NULL) {
-    addenv(blk, "PATH_INFO=%s", conn->path_info);
-  }
-
-#if defined(_WIN32)
-  if ((s = getenv("COMSPEC")) != NULL) {
-    addenv(blk, "COMSPEC=%s", s);
-  }
-  if ((s = getenv("SYSTEMROOT")) != NULL) {
-    addenv(blk, "SYSTEMROOT=%s", s);
-  }
-  if ((s = getenv("SystemDrive")) != NULL) {
-    addenv(blk, "SystemDrive=%s", s);
-  }
-#else
-  if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
-    addenv(blk, "LD_LIBRARY_PATH=%s", s);
-#endif // _WIN32
-
-  if ((s = getenv("PERLLIB")) != NULL)
-    addenv(blk, "PERLLIB=%s", s);
-
-  if (conn->request_info.remote_user != NULL) {
-    addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
-    addenv(blk, "%s", "AUTH_TYPE=Digest");
-  }
-
-  // Add all headers as HTTP_* variables
-  for (i = 0; i < conn->request_info.num_headers; i++) {
-    p = addenv(blk, "HTTP_%s=%s",
-        conn->request_info.http_headers[i].name,
-        conn->request_info.http_headers[i].value);
-
-    // Convert variable name into uppercase, and change - to _
-    for (; *p != '=' && *p != '\0'; p++) {
-      if (*p == '-')
-        *p = '_';
-      *p = (char) toupper(* (unsigned char *) p);
-    }
-  }
-
-  // Add user-specified variables
-  s = conn->ctx->config[CGI_ENVIRONMENT];
-  while ((s = next_option(s, &var_vec, NULL)) != NULL) {
-    addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
-  }
-
-  blk->vars[blk->nvars++] = NULL;
-  blk->buf[blk->len++] = '\0';
-
-  assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
-  assert(blk->len > 0);
-  assert(blk->len < (int) sizeof(blk->buf));
-}
-
-static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
-  int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
-  const char *status, *status_text;
-  char buf[BUFSIZ], *pbuf, dir[PATH_MAX], *p;
-  struct mg_request_info ri;
-  struct cgi_env_block blk;
-  FILE *in, *out;
-  pid_t pid;
-
-  prepare_cgi_environment(conn, prog, &blk);
-
-  // CGI must be executed in its own directory. 'dir' must point to the
-  // directory containing executable program, 'p' must point to the
-  // executable program name relative to 'dir'.
-  (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
-  if ((p = strrchr(dir, DIRSEP)) != NULL) {
-    *p++ = '\0';
-  } else {
-    dir[0] = '.', dir[1] = '\0';
-    p = (char *) prog;
-  }
-
-  pid = (pid_t) -1;
-  fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
-  in = out = NULL;
-
-  if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
-    send_http_error(conn, 500, http_500_error,
-        "Cannot create CGI pipe: %s", strerror(ERRNO));
-    goto done;
-  } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
-          fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
-    goto done;
-  } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
-      (out = fdopen(fd_stdout[0], "rb")) == NULL) {
-    send_http_error(conn, 500, http_500_error,
-        "fopen: %s", strerror(ERRNO));
-    goto done;
-  }
-
-  setbuf(in, NULL);
-  setbuf(out, NULL);
-
-  // spawn_process() must close those!
-  // If we don't mark them as closed, close() attempt before
-  // return from this function throws an exception on Windows.
-  // Windows does not like when closed descriptor is closed again.
-  fd_stdin[0] = fd_stdout[1] = -1;
-
-  // Send POST data to the CGI process if needed
-  if (!strcmp(conn->request_info.request_method, "POST") &&
-      !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
-    goto done;
-  }
-
-  // Now read CGI reply into a buffer. We need to set correct
-  // status code, thus we need to see all HTTP headers first.
-  // Do not send anything back to client, until we buffer in all
-  // HTTP headers.
-  data_len = 0;
-  headers_len = read_request(out, INVALID_SOCKET, NULL,
-      buf, sizeof(buf), &data_len);
-  if (headers_len <= 0) {
-    send_http_error(conn, 500, http_500_error,
-                    "CGI program sent malformed HTTP headers: [%.*s]",
-                    data_len, buf);
-    goto done;
-  }
-  pbuf = buf;
-  buf[headers_len - 1] = '\0';
-  parse_http_headers(&pbuf, &ri);
-
-  // Make up and send the status line
-  status_text = "OK";
-  if ((status = get_header(&ri, "Status")) != NULL) {
-    conn->request_info.status_code = atoi(status);
-    status_text = status;
-    while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
-      status_text++;
-    }
-  } else if (get_header(&ri, "Location") != NULL) {
-    conn->request_info.status_code = 302;
-  } else {
-    conn->request_info.status_code = 200;
-  }
-  if (get_header(&ri, "Connection") != NULL &&
-      !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
-    conn->must_close = 1;
-  }
-  (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->request_info.status_code,
-                   status_text);
-
-  // Send headers
-  for (i = 0; i < ri.num_headers; i++) {
-    mg_printf(conn, "%s: %s\r\n",
-              ri.http_headers[i].name, ri.http_headers[i].value);
-  }
-  (void) mg_write(conn, "\r\n", 2);
-
-  // Send chunk of data that may be read after the headers
-  conn->num_bytes_sent += mg_write(conn, buf + headers_len,
-                                   (size_t)(data_len - headers_len));
-
-  // Read the rest of CGI output and send to the client
-  send_file_data(conn, out, INT64_MAX);
-
-done:
-  if (pid != (pid_t) -1) {
-    kill(pid, SIGKILL);
-  }
-  if (fd_stdin[0] != -1) {
-    (void) close(fd_stdin[0]);
-  }
-  if (fd_stdout[1] != -1) {
-    (void) close(fd_stdout[1]);
-  }
-
-  if (in != NULL) {
-    (void) fclose(in);
-  } else if (fd_stdin[1] != -1) {
-    (void) close(fd_stdin[1]);
-  }
-
-  if (out != NULL) {
-    (void) fclose(out);
-  } else if (fd_stdout[0] != -1) {
-    (void) close(fd_stdout[0]);
-  }
-}
-#endif // !NO_CGI
-
-// For a given PUT path, create all intermediate subdirectories
-// for given path. Return 0 if the path itself is a directory,
-// or -1 on error, 1 if OK.
-static int put_dir(const char *path) {
-  char buf[PATH_MAX];
-  const char *s, *p;
-  struct mgstat st;
-  int len, res = 1;
-
-  for (s = p = path + 2; (p = strchr(s, DIRSEP)) != NULL; s = ++p) {
-    len = p - path;
-    if (len >= (int) sizeof(buf)) {
-      res = -1;
-      break;
-    }
-    memcpy(buf, path, len);
-    buf[len] = '\0';
-
-    // Try to create intermediate directory
-    DEBUG_TRACE(("mkdir(%s)", buf));
-    if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
-      res = -1;
-      break;
-    }
-
-    // Is path itself a directory?
-    if (p[1] == '\0') {
-      res = 0;
-    }
-  }
-
-  return res;
-}
-
-static void put_file(struct mg_connection *conn, const char *path) {
-  struct mgstat st;
-  const char *range;
-  int64_t r1, r2;
-  FILE *fp;
-  int rc;
-
-  conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
-
-  if ((rc = put_dir(path)) == 0) {
-    mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
-  } else if (rc == -1) {
-    send_http_error(conn, 500, http_500_error,
-        "put_dir(%s): %s", path, strerror(ERRNO));
-  } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
-    send_http_error(conn, 500, http_500_error,
-        "fopen(%s): %s", path, strerror(ERRNO));
-  } else {
-    set_close_on_exec(fileno(fp));
-    range = mg_get_header(conn, "Content-Range");
-    r1 = r2 = 0;
-    if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
-      conn->request_info.status_code = 206;
-      // TODO(lsm): handle seek error
-      (void) fseeko(fp, (off_t) r1, SEEK_SET);
-    }
-    if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
-      (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
-          conn->request_info.status_code);
-    (void) fclose(fp);
-  }
-}
-
-static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
-
-static void do_ssi_include(struct mg_connection *conn, const char *ssi,
-                           char *tag, int include_level) {
-  char file_name[BUFSIZ], path[PATH_MAX], *p;
-  FILE *fp;
-
-  // sscanf() is safe here, since send_ssi_file() also uses buffer
-  // of size BUFSIZ to get the tag. So strlen(tag) is always < BUFSIZ.
-  if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the webserver root
-    (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
-        conn->ctx->config[DOCUMENT_ROOT], DIRSEP, file_name);
-  } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the webserver working directory
-    // or it is absolute system path
-    (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
-  } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
-    // File name is relative to the currect document
-    (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
-    if ((p = strrchr(path, DIRSEP)) != NULL) {
-      p[1] = '\0';
-    }
-    (void) mg_snprintf(conn, path + strlen(path),
-        sizeof(path) - strlen(path), "%s", file_name);
-  } else {
-    cry(conn, "Bad SSI #include: [%s]", tag);
-    return;
-  }
-
-  if ((fp = mg_fopen(path, "rb")) == NULL) {
-    cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
-        tag, path, strerror(ERRNO));
-  } else {
-    set_close_on_exec(fileno(fp));
-    if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
-                     strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
-      send_ssi_file(conn, path, fp, include_level + 1);
-    } else {
-      send_file_data(conn, fp, INT64_MAX);
-    }
-    (void) fclose(fp);
-  }
-}
-
-#if !defined(NO_POPEN)
-static void do_ssi_exec(struct mg_connection *conn, char *tag) {
-  char cmd[BUFSIZ];
-  FILE *fp;
-
-  if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
-    cry(conn, "Bad SSI #exec: [%s]", tag);
-  } else if ((fp = popen(cmd, "r")) == NULL) {
-    cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
-  } else {
-    send_file_data(conn, fp, INT64_MAX);
-    (void) pclose(fp);
-  }
-}
-#endif // !NO_POPEN
-
-static void send_ssi_file(struct mg_connection *conn, const char *path,
-                          FILE *fp, int include_level) {
-  char buf[BUFSIZ];
-  int ch, len, in_ssi_tag;
-
-  if (include_level > 10) {
-    cry(conn, "SSI #include level is too deep (%s)", path);
-    return;
-  }
-
-  in_ssi_tag = 0;
-  len = 0;
-
-  while ((ch = fgetc(fp)) != EOF) {
-    if (in_ssi_tag && ch == '>') {
-      in_ssi_tag = 0;
-      buf[len++] = (char) ch;
-      buf[len] = '\0';
-      assert(len <= (int) sizeof(buf));
-      if (len < 6 || memcmp(buf, "