X-Git-Url: http://www.privoxy.org/gitweb/?a=blobdiff_plain;f=cgi.c;h=7816c37aea2bc07f9841f747e9425020dfc658b6;hb=048db68f0449f4b4a10eb56ad6e07e55fb475b2c;hp=0fa5527917df19d1cc154c9d15ba7a1718ebad90;hpb=cc863cc1babbd736c55b2cc31f88f12fa5b74580;p=privoxy.git diff --git a/cgi.c b/cgi.c index 0fa55279..7816c37a 100644 --- a/cgi.c +++ b/cgi.c @@ -1,4 +1,4 @@ -const char cgi_rcs[] = "$Id: cgi.c,v 1.86 2007/01/09 11:54:26 fabiankeil Exp $"; +const char cgi_rcs[] = "$Id: cgi.c,v 1.92 2007/01/28 13:41:17 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/cgi.c,v $ @@ -38,6 +38,36 @@ const char cgi_rcs[] = "$Id: cgi.c,v 1.86 2007/01/09 11:54:26 fabiankeil Exp $"; * * Revisions : * $Log: cgi.c,v $ + * Revision 1.92 2007/01/28 13:41:17 fabiankeil + * - Add HEAD support to finish_http_response. + * - Add error favicon to internal HTML error messages. + * + * Revision 1.91 2007/01/27 13:09:16 fabiankeil + * Add new config option "templdir" to + * change the templates directory. + * + * Revision 1.90 2007/01/25 13:47:26 fabiankeil + * Added "forwarding-failed" template support for error_response(). + * + * Revision 1.89 2007/01/23 15:51:16 fabiankeil + * Add favicon delivery functions. + * + * Revision 1.88 2007/01/23 13:14:32 fabiankeil + * - Map variables that aren't guaranteed to be + * pure ASCII html_encoded. + * - Use CGI_PREFIX to generate URL for user manual + * CGI page to make sure CGI_SITE_2_PATH is included. + * + * Revision 1.87 2007/01/22 15:34:13 fabiankeil + * - "Protect" against a rather lame JavaScript-based + * Privoxy detection "attack" and check the referrer + * before delivering the CGI style sheet. + * - Move referrer check for unsafe CGI pages into + * referrer_is_safe() and log the result. + * - Map @url@ in cgi-error-disabled page. + * It's required for the "go there anyway" link. + * - Mark *csp as immutable for grep_cgi_referrer(). + * * Revision 1.86 2007/01/09 11:54:26 fabiankeil * Fix strdup() error handling in cgi_error_unknown() * and cgi_error_no_template(). Reported by Markus Elfring. @@ -546,6 +576,7 @@ const char cgi_rcs[] = "$Id: cgi.c,v 1.86 2007/01/09 11:54:26 fabiankeil Exp $"; #include "encode.h" #include "ssplit.h" #include "errlog.h" +#include "filters.h" #include "miscutil.h" #include "cgisimple.h" #ifdef FEATURE_CGI_EDIT_ACTIONS @@ -670,6 +701,12 @@ static const struct cgi_dispatcher cgi_dispatchers[] = { cgi_edit_actions_section_swap, NULL, FALSE /* Swap two sections in the actionsfile */ }, #endif /* def FEATURE_CGI_EDIT_ACTIONS */ + { "error-favicon.ico", + cgi_send_error_favicon, + NULL, TRUE /* Sends the favicon image for error pages. */ }, + { "favicon.ico", + cgi_send_default_favicon, + NULL, TRUE /* Sends the default favicon image. */ }, { "robots.txt", cgi_robots_txt, NULL, TRUE /* Sends a robots.txt file to tell robots to go away. */ }, @@ -984,10 +1021,6 @@ static struct http_response *dispatch_known_cgi(struct client_state * csp, return cgi_error_memory(); } - log_error(LOG_LEVEL_GPC, "%s%s cgi call", csp->http->hostport, csp->http->path); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", - csp->ip_addr_str, csp->http->cmd); - /* * Find and start the right CGI function */ @@ -1037,7 +1070,8 @@ static struct http_response *dispatch_known_cgi(struct client_state * csp, if (!err) { /* It worked */ - return finish_http_response(rsp); + rsp->reason = RSP_REASON_CGI_CALL; + return finish_http_response(csp, rsp); } else { @@ -1324,11 +1358,13 @@ struct http_response *error_response(struct client_state *csp, return cgi_error_memory(); } +#ifdef FEATURE_FORCE_LOAD if (csp->flags & CSP_FLAG_FORCED) { path = strdup(FORCE_PREFIX); } else +#endif /* def FEATURE_FORCE_LOAD */ { path = strdup(""); } @@ -1366,6 +1402,48 @@ struct http_response *error_response(struct client_state *csp, free_http_response(rsp); return cgi_error_memory(); } + rsp->reason = RSP_REASON_NO_SUCH_DOMAIN; + } + else if (!strcmp(templatename, "forwarding-failed")) + { + const struct forward_spec * fwd = forward_url(csp->http, csp); + if (fwd == NULL) + { + log_error(LOG_LEVEL_FATAL, "gateway spec is NULL. This shouldn't happen!"); + /* Never get here - LOG_LEVEL_FATAL causes program exit */ + } + + /* + * XXX: While the template is called forwarding-failed, + * it currently only handles socks forwarding failures. + */ + assert(fwd->type != SOCKS_NONE); + + /* + * Map failure reason, forwarding type and forwarder. + */ + if (NULL == csp->error_message) + { + /* + * Either we forgot to record the failure reason, + * or the memory allocation failed. + */ + log_error(LOG_LEVEL_ERROR, "Socks failure reason missing."); + csp->error_message = strdup("Failure reason missing. Check the log file for details."); + } + if (!err) err = map(exports, "gateway", 1, fwd->gateway_host, 1); + if (!err) map(exports, "forwarding-type", 1, (fwd->type == SOCKS_4) ? + "socks4-" : "socks4a-", 1); + if (!err) err = map(exports, "error-message", 1, html_encode(csp->error_message), 0); + + if (!err) rsp->status = strdup("503 Forwarding failure"); + if ((rsp->status == NULL) || (NULL == csp->error_message) || err) + { + free_map(exports); + free_http_response(rsp); + return cgi_error_memory(); + } + rsp->reason = RSP_REASON_FORWARDING_FAILED; } else if (!strcmp(templatename, "connect-failed")) { @@ -1376,6 +1454,7 @@ struct http_response *error_response(struct client_state *csp, free_http_response(rsp); return cgi_error_memory(); } + rsp->reason = RSP_REASON_CONNECT_FAILED; } err = template_fill_for_cgi(csp, templatename, exports, rsp); @@ -1385,7 +1464,7 @@ struct http_response *error_response(struct client_state *csp, return cgi_error_memory(); } - return finish_http_response(rsp); + return finish_http_response(csp, rsp); } @@ -1422,7 +1501,7 @@ jb_err cgi_error_disabled(struct client_state *csp, { return JB_ERR_MEMORY; } - if (map(exports, "url", 1, csp->http->url, 1)) + if (map(exports, "url", 1, html_encode(csp->http->url), 0)) { /* Not important enough to do anything */ log_error(LOG_LEVEL_ERROR, "Failed to fill in url."); @@ -1453,7 +1532,10 @@ void cgi_init_error_messages(void) "\r\n"; cgi_error_memory_response->body = "\r\n" - "500 Internal Privoxy Error\r\n" + "\r\n" + " 500 Internal Privoxy Error\r\n" + " " + "\r\n" "\r\n" "

500 Internal Privoxy Error

\r\n" "

Privoxy ran out of memory while processing your request.

\r\n" @@ -1465,6 +1547,7 @@ void cgi_init_error_messages(void) strlen(cgi_error_memory_response->head); cgi_error_memory_response->content_length = strlen(cgi_error_memory_response->body); + cgi_error_memory_response->reason = RSP_REASON_OUT_OF_MEMORY; } @@ -1517,7 +1600,10 @@ jb_err cgi_error_no_template(struct client_state *csp, "500 Internal Privoxy Error"; static const char body_prefix[] = "\r\n" - "500 Internal Privoxy Error\r\n" + "\r\n" + " 500 Internal Privoxy Error\r\n" + " " + "\r\n" "\r\n" "

500 Internal Privoxy Error

\r\n" "

Privoxy encountered an error while processing your request:

\r\n" @@ -1600,7 +1686,10 @@ jb_err cgi_error_unknown(struct client_state *csp, "500 Internal Privoxy Error"; static const char body_prefix[] = "\r\n" - "500 Internal Privoxy Error\r\n" + "\r\n" + " 500 Internal Privoxy Error\r\n" + " " + "\r\n" "\r\n" "

500 Internal Privoxy Error

\r\n" "

Privoxy encountered an error while processing your request:

\r\n" @@ -1608,7 +1697,7 @@ jb_err cgi_error_unknown(struct client_state *csp, static const char body_suffix[] = "

\r\n" "

Please " - "" + "" "file a bug report.

\r\n" "\r\n" "\r\n"; @@ -1623,6 +1712,7 @@ jb_err cgi_error_unknown(struct client_state *csp, rsp->content_length = 0; rsp->head_length = 0; rsp->is_static = 0; + rsp->reason = RSP_REASON_INTERNAL_ERROR; snprintf(errnumbuf, sizeof(errnumbuf), "%d", error_to_report); @@ -1843,6 +1933,8 @@ void get_http_time(int time_offset, char *buf) * * Description : Fill in the missing headers in an http response, * and flatten the headers to an http head. + * For HEAD requests the body is freed once + * the Content-Length header is set. * * Parameters : * 1 : rsp = pointer to http_response to be processed @@ -1851,7 +1943,7 @@ void get_http_time(int time_offset, char *buf) * On error, free()s rsp and returns cgi_error_memory() * *********************************************************************/ -struct http_response *finish_http_response(struct http_response *rsp) +struct http_response *finish_http_response(const struct client_state *csp, struct http_response *rsp) { char buf[BUFFER_SIZE]; jb_err err; @@ -1883,6 +1975,24 @@ struct http_response *finish_http_response(struct http_response *rsp) err = enlist(rsp->headers, buf); } + if (0 == strcmpic(csp->http->gpc, "head")) + { + /* + * The client only asked for the head. Dispose + * the body and log an offensive message. + * + * While it may seem to be a bit inefficient to + * prepare the body if it isn't needed, it's the + * only way to get the Content-Length right for + * dynamic pages. We could have disposed the body + * earlier, but not without duplicating the + * Content-Length setting code above. + */ + log_error(LOG_LEVEL_CGI, "Preparing to give head to %s.", csp->ip_addr_str); + freez(rsp->body); + rsp->content_length = 0; + } + if (strncmpic(rsp->status, "302", 3)) { /* @@ -1944,7 +2054,7 @@ struct http_response *finish_http_response(struct http_response *rsp) * is older than Privoxy's error message, the server would send status code * 304 and the browser would display the outdated error message again and again. * - * For documents delivered with status code 404 or 503 we set "Last-Modified" + * For documents delivered with status code 403, 404 and 503 we set "Last-Modified" * to Tim Berners-Lee's birthday, which predates the age of any page on the web * and can be safely used to "revalidate" without getting a status code 304. * @@ -1955,7 +2065,9 @@ struct http_response *finish_http_response(struct http_response *rsp) get_http_time(0, buf); if (!err) err = enlist_unique_header(rsp->headers, "Date", buf); - if (!strncmpic(rsp->status, "404", 3) || !strncmpic(rsp->status, "503", 3)) + if (!strncmpic(rsp->status, "403", 3) + || !strncmpic(rsp->status, "404", 3) + || !strncmpic(rsp->status, "503", 3)) { if (!err) err = enlist_unique_header(rsp->headers, "Last-Modified", "Wed, 08 Jun 1955 12:00:00 GMT"); } @@ -2043,9 +2155,8 @@ void free_http_response(struct http_response *rsp) * Function : template_load * * Description : CGI support function that loads a given HTML - * template from the confdir, ignoring comment - * lines and following #include statements up to - * a depth of 1. + * template, ignoring comment lines and following + * #include statements up to a depth of 1. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) @@ -2092,11 +2203,23 @@ jb_err template_load(struct client_state *csp, char **template_ptr, } } - /* Generate full path */ + /* + * Generate full path using either templdir + * or confdir/templates as base directory. + */ + if (NULL != csp->config->templdir) + { + templates_dir_path = strdup(csp->config->templdir); + } + else + { + templates_dir_path = make_path(csp->config->confdir, "templates"); + } - templates_dir_path = make_path(csp->config->confdir, "templates"); if (templates_dir_path == NULL) { + log_error(LOG_LEVEL_ERROR, "Out of memory while generating template path for %s.", + templatename); return JB_ERR_MEMORY; } @@ -2104,6 +2227,8 @@ jb_err template_load(struct client_state *csp, char **template_ptr, free(templates_dir_path); if (full_path == NULL) { + log_error(LOG_LEVEL_ERROR, "Out of memory while generating full template path for %s.", + templatename); return JB_ERR_MEMORY; } @@ -2112,6 +2237,7 @@ jb_err template_load(struct client_state *csp, char **template_ptr, file_buffer = strdup(""); if (file_buffer == NULL) { + log_error(LOG_LEVEL_ERROR, "Not enough free memory to buffer %s.", full_path); free(full_path); return JB_ERR_MEMORY; } @@ -2393,11 +2519,13 @@ struct map *default_exports(const struct client_state *csp, const char *caller) if (!strncmpic(csp->config->usermanual, "file://", 7) || !strncmpic(csp->config->usermanual, "http", 4)) { - if (!err) err = map(exports, "user-manual", 1, csp->config->usermanual ,1); + /* Manual is located somewhere else, just link to it. */ + if (!err) err = map(exports, "user-manual", 1, html_encode(csp->config->usermanual), 0); } else { - if (!err) err = map(exports, "user-manual", 1, "http://"CGI_SITE_2_HOST"/user-manual/" ,1); + /* Manual is delivered by Privoxy. */ + if (!err) err = map(exports, "user-manual", 1, html_encode(CGI_PREFIX"user-manual/"), 0); } if (!err) err = map(exports, "actions-help-prefix", 1, ACTIONS_HELP_PREFIX ,1); #ifdef FEATURE_TOGGLE @@ -2611,7 +2739,23 @@ char *make_menu(const char *self, const unsigned feature_flags) if (d->description && strcmp(d->name, self)) { - string_append(&result, "
  • name); string_append(&result, "\">"); string_append(&result, d->description);