/* * Copyright 2011 Vincent Sanders * * This file is part of NetSurf. * * NetSurf is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * NetSurf is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /** * \file * * URL handling for the "about" scheme. * * Based on the data fetcher by Rob Kendrick * This fetcher provides a simple scheme for the user to access * information from the browser from a known, fixed URL. */ #include #include #include #include #include "utils/log.h" #include "testament.h" #include "utils/corestrings.h" #include "utils/nsoption.h" #include "utils/utils.h" #include "utils/messages.h" #include "utils/ring.h" #include "content/fetch.h" #include "content/fetchers.h" #include "content/fetchers/about.h" #include "image/image_cache.h" struct fetch_about_context; typedef bool (*fetch_about_handler)(struct fetch_about_context *); /** * Context for an about fetch */ struct fetch_about_context { struct fetch_about_context *r_next, *r_prev; struct fetch *fetchh; /**< Handle for this fetch */ bool aborted; /**< Flag indicating fetch has been aborted */ bool locked; /**< Flag indicating entry is already entered */ nsurl *url; /**< The full url the fetch refers to */ const struct fetch_multipart_data *multipart; /**< post data */ fetch_about_handler handler; }; static struct fetch_about_context *ring = NULL; /** * handler info for about scheme */ struct about_handlers { const char *name; /**< name to match in url */ int name_len; lwc_string *lname; /**< Interned name */ fetch_about_handler handler; /**< handler for the url */ bool hidden; /**< If entry should be hidden in listing */ }; /** * authentication query description if messages fails to retrieve usable text */ static const char *authentication_description_fallback = "The site %s is requesting your username and password. The realm is \"%s\""; /** * privacy query description if messages fails to retrieve usable text */ static const char *privacy_description_fallback = "A privacy error occurred while communicating with %s this may be a site configuration error or an attempt to steal private information (passwords, messages or credit cards)"; /** * issue fetch callbacks with locking */ static inline bool fetch_about_send_callback(const fetch_msg *msg, struct fetch_about_context *ctx) { ctx->locked = true; fetch_send_callback(msg, ctx->fetchh); ctx->locked = false; return ctx->aborted; } static inline bool fetch_about_send_finished(struct fetch_about_context *ctx) { fetch_msg msg; msg.type = FETCH_FINISHED; return fetch_about_send_callback(&msg, ctx); } static bool fetch_about_send_header(struct fetch_about_context *ctx, const char *fmt, ...) { char header[64]; fetch_msg msg; va_list ap; va_start(ap, fmt); vsnprintf(header, sizeof header, fmt, ap); va_end(ap); msg.type = FETCH_HEADER; msg.data.header_or_data.buf = (const uint8_t *) header; msg.data.header_or_data.len = strlen(header); return fetch_about_send_callback(&msg, ctx); } /** * send formatted data on a fetch */ static nserror ssenddataf(struct fetch_about_context *ctx, const char *fmt, ...) { char buffer[1024]; fetch_msg msg; va_list ap; int slen; va_start(ap, fmt); slen = vsnprintf(buffer, sizeof(buffer), fmt, ap); va_end(ap); if (slen >= (int)sizeof(buffer)) { return NSERROR_NOSPACE; } msg.type = FETCH_DATA; msg.data.header_or_data.buf = (const uint8_t *) buffer; msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) { return NSERROR_INVALID; } return NSERROR_OK; } /** * Generate a 500 server error respnse * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_srverror(struct fetch_about_context *ctx) { nserror res; fetch_set_http_code(ctx->fetchh, 500); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/plain")) return false; res = ssenddataf(ctx, "Server error 500"); if (res != NSERROR_OK) { return false; } fetch_about_send_finished(ctx); return true; } /** * Handler to generate about scheme cache page. * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_blank_handler(struct fetch_about_context *ctx) { fetch_msg msg; const char buffer[2] = { ' ', '\0' }; /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, 200); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/html")) goto fetch_about_blank_handler_aborted; msg.type = FETCH_DATA; msg.data.header_or_data.buf = (const uint8_t *) buffer; msg.data.header_or_data.len = strlen(buffer); if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_blank_handler_aborted; msg.type = FETCH_FINISHED; fetch_about_send_callback(&msg, ctx); return true; fetch_about_blank_handler_aborted: return false; } /** * Handler to generate about scheme credits page. * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_credits_handler(struct fetch_about_context *ctx) { fetch_msg msg; /* content is going to return redirect */ fetch_set_http_code(ctx->fetchh, 302); msg.type = FETCH_REDIRECT; msg.data.redirect = "resource:credits.html"; fetch_about_send_callback(&msg, ctx); return true; } /** * Handler to generate about scheme licence page. * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_licence_handler(struct fetch_about_context *ctx) { fetch_msg msg; /* content is going to return redirect */ fetch_set_http_code(ctx->fetchh, 302); msg.type = FETCH_REDIRECT; msg.data.redirect = "resource:licence.html"; fetch_about_send_callback(&msg, ctx); return true; } /** * Handler to generate about:cache page. * * Shows details of current image cache. * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_imagecache_handler(struct fetch_about_context *ctx) { fetch_msg msg; char buffer[2048]; /* output buffer */ int code = 200; int slen; unsigned int cent_loop = 0; int elen = 0; /* entry length */ nserror res; /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, code); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/html")) goto fetch_about_imagecache_handler_aborted; /* page head */ res = ssenddataf(ctx, "\n\n" "NetSurf Browser Image Cache Status\n" "\n" "\n" "\n" "

" "" "\"NetSurf\"" "

\n" "

NetSurf Browser Image Cache Status

\n"); if (res != NSERROR_OK) { goto fetch_about_imagecache_handler_aborted; } /* image cache summary */ slen = image_cache_snsummaryf(buffer, sizeof(buffer), "

Configured limit of %a hysteresis of %b

\n" "

Total bitmap size in use %c (in %d)

\n" "

Age %es

\n" "

Peak size %f (in %g)

\n" "

Peak image count %h (size %i)

\n" "

Cache total/hit/miss/fail (counts) %j/%k/%l/%m " "(%pj%%/%pk%%/%pl%%/%pm%%)

\n" "

Cache total/hit/miss/fail (size) %n/%o/%q/%r " "(%pn%%/%po%%/%pq%%/%pr%%)

\n" "

Total images never rendered: %s " "(includes %t that were converted)

\n" "

Total number of excessive conversions: %u " "(from %v images converted more than once)" "

\n" "

Bitmap of size %w had most (%x) conversions

\n" "

Current image cache contents

\n"); if (slen >= (int) (sizeof(buffer))) { goto fetch_about_imagecache_handler_aborted; /* overflow */ } /* send image cache summary */ msg.type = FETCH_DATA; msg.data.header_or_data.buf = (const uint8_t *) buffer; msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) { goto fetch_about_imagecache_handler_aborted; } /* image cache entry table */ res = ssenddataf(ctx, "

\n" "" "Entry" "Content Key" "Redraw Count" "Conversion Count" "Last Redraw" "Bitmap Age" "Bitmap Size" "Source" "\n"); if (res != NSERROR_OK) { goto fetch_about_imagecache_handler_aborted; } slen = 0; do { elen = image_cache_snentryf(buffer + slen, sizeof buffer - slen, cent_loop, "" "%e" "%k" "%r" "%c" "%a" "%g" "%s" "%o" "\n"); if (elen <= 0) break; /* last option */ if (elen >= (int) (sizeof buffer - slen)) { /* last entry would not fit in buffer, submit buffer */ msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_imagecache_handler_aborted; slen = 0; } else { /* normal addition */ slen += elen; cent_loop++; } } while (elen > 0); slen += snprintf(buffer + slen, sizeof buffer - slen, "

\n\n\n"); msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_imagecache_handler_aborted; fetch_about_send_finished(ctx); return true; fetch_about_imagecache_handler_aborted: return false; } /** * Handler to generate about scheme config page * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_config_handler(struct fetch_about_context *ctx) { fetch_msg msg; char buffer[1024]; int slen = 0; unsigned int opt_loop = 0; int elen = 0; /* entry length */ nserror res; /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, 200); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/html")) { goto fetch_about_config_handler_aborted; } res = ssenddataf(ctx, "\n\n" "NetSurf Browser Config\n" "\n" "\n" "\n" "

" "" "\"NetSurf\"" "

\n" "

NetSurf Browser Config

\n" "\n" "" "" "" "\n"); if (res != NSERROR_OK) { goto fetch_about_config_handler_aborted; } msg.type = FETCH_DATA; msg.data.header_or_data.buf = (const uint8_t *) buffer; do { elen = nsoption_snoptionf(buffer + slen, sizeof buffer - slen, opt_loop, "\n"); if (elen <= 0) break; /* last option */ if (elen >= (int) (sizeof buffer - slen)) { /* last entry would not fit in buffer, submit buffer */ msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_config_handler_aborted; slen = 0; } else { /* normal addition */ slen += elen; opt_loop++; } } while (elen > 0); slen += snprintf(buffer + slen, sizeof buffer - slen, "
OptionTypeProvenanceSetting
%k%t%p%V
\n\n\n"); msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_config_handler_aborted; fetch_about_send_finished(ctx); return true; fetch_about_config_handler_aborted: return false; } /** * Generate the text of a Choices file which represents the current * in use options. * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_choices_handler(struct fetch_about_context *ctx) { fetch_msg msg; char buffer[1024]; int code = 200; int slen; unsigned int opt_loop = 0; int res = 0; /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, code); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/plain")) goto fetch_about_choices_handler_aborted; msg.type = FETCH_DATA; msg.data.header_or_data.buf = (const uint8_t *) buffer; slen = snprintf(buffer, sizeof buffer, "# Automatically generated current NetSurf browser Choices\n"); do { res = nsoption_snoptionf(buffer + slen, sizeof buffer - slen, opt_loop, "%k:%v\n"); if (res <= 0) break; /* last option */ if (res >= (int) (sizeof buffer - slen)) { /* last entry would not fit in buffer, submit buffer */ msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_choices_handler_aborted; slen = 0; } else { /* normal addition */ slen += res; opt_loop++; } } while (res > 0); msg.data.header_or_data.len = slen; if (fetch_about_send_callback(&msg, ctx)) goto fetch_about_choices_handler_aborted; fetch_about_send_finished(ctx); return true; fetch_about_choices_handler_aborted: return false; } typedef struct { const char *leaf; const char *modtype; } modification_t; /** * Generate the text of an svn testament which represents the current * build-tree status * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_testament_handler(struct fetch_about_context *ctx) { nserror res; static modification_t modifications[] = WT_MODIFICATIONS; int modidx; /* midification index */ /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, 200); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/plain")) goto fetch_about_testament_handler_aborted; res = ssenddataf(ctx, "# Automatically generated by NetSurf build system\n\n"); if (res != NSERROR_OK) { goto fetch_about_testament_handler_aborted; } res = ssenddataf(ctx, #if defined(WT_BRANCHISTRUNK) || defined(WT_BRANCHISMASTER) "# This is a *DEVELOPMENT* build from the main line.\n\n" #elif defined(WT_BRANCHISTAG) && (WT_MODIFIED == 0) "# This is a tagged build of NetSurf\n" #ifdef WT_TAGIS "# The tag used was '" WT_TAGIS "'\n\n" #else "\n" #endif #elif defined(WT_NO_SVN) || defined(WT_NO_GIT) "# This NetSurf was built outside of our revision " "control environment.\n" "# This testament is therefore not very useful.\n\n" #else "# This NetSurf was built from a branch (" WT_BRANCHPATH ").\n\n" #endif #if defined(CI_BUILD) "# This build carries the CI build number '" CI_BUILD "'\n\n" #endif ); if (res != NSERROR_OK) { goto fetch_about_testament_handler_aborted; } res = ssenddataf(ctx, "Built by %s (%s) from %s at revision %s on %s\n\n", GECOS, USERNAME, WT_BRANCHPATH, WT_REVID, WT_COMPILEDATE); if (res != NSERROR_OK) { goto fetch_about_testament_handler_aborted; } res = ssenddataf(ctx, "Built on %s in %s\n\n", WT_HOSTNAME, WT_ROOT); if (res != NSERROR_OK) { goto fetch_about_testament_handler_aborted; } if (WT_MODIFIED > 0) { res = ssenddataf(ctx, "Working tree has %d modification%s\n\n", WT_MODIFIED, WT_MODIFIED == 1 ? "" : "s"); } else { res = ssenddataf(ctx, "Working tree is not modified.\n"); } if (res != NSERROR_OK) { goto fetch_about_testament_handler_aborted; } for (modidx = 0; modidx < WT_MODIFIED; ++modidx) { res = ssenddataf(ctx, " %s %s\n", modifications[modidx].modtype, modifications[modidx].leaf); if (res != NSERROR_OK) { goto fetch_about_testament_handler_aborted; } } fetch_about_send_finished(ctx); return true; fetch_about_testament_handler_aborted: return false; } /** * Handler to generate about scheme logo page * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_logo_handler(struct fetch_about_context *ctx) { fetch_msg msg; /* content is going to return redirect */ fetch_set_http_code(ctx->fetchh, 302); msg.type = FETCH_REDIRECT; msg.data.redirect = "resource:netsurf.png"; fetch_about_send_callback(&msg, ctx); return true; } /** * Handler to generate about scheme welcome page * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_welcome_handler(struct fetch_about_context *ctx) { fetch_msg msg; /* content is going to return redirect */ fetch_set_http_code(ctx->fetchh, 302); msg.type = FETCH_REDIRECT; msg.data.redirect = "resource:welcome.html"; fetch_about_send_callback(&msg, ctx); return true; } /** * Handler to generate about scheme maps page * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_maps_handler(struct fetch_about_context *ctx) { fetch_msg msg; /* content is going to return redirect */ fetch_set_http_code(ctx->fetchh, 302); msg.type = FETCH_REDIRECT; msg.data.redirect = "resource:maps.html"; fetch_about_send_callback(&msg, ctx); return true; } /** * generate the description of the login query */ static nserror get_authentication_description(struct nsurl *url, const char *realm, const char *username, const char *password, char **out_str) { nserror res; char *url_s; size_t url_l; char *str = NULL; int slen; const char *key; res = nsurl_get(url, NSURL_HOST, &url_s, &url_l); if (res != NSERROR_OK) { return res; } if ((*username == 0) && (*password == 0)) { key = "LoginDescription"; } else { key = "LoginAgain"; } str = messages_get_buff(key, url_s, realm); NSLOG(netsurf, INFO, "key:%s url:%s realm:%s str:%s", key, url_s, realm, str); if ((str != NULL) && (strcmp(key, str) != 0)) { *out_str = str; } else { /* no message so fallback */ slen = snprintf(str, 0, authentication_description_fallback, url_s, realm) + 1; str = malloc(slen); if (str == NULL) { res = NSERROR_NOMEM; } else { snprintf(str, slen, authentication_description_fallback, url_s, realm); *out_str = str; } } free(url_s); return res; } /** * Handler to generate about scheme authentication query page * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_query_auth_handler(struct fetch_about_context *ctx) { nserror res; char *url_s; size_t url_l; const char *realm = ""; const char *username = ""; const char *password = ""; const char *title; char *description = NULL; struct nsurl *siteurl = NULL; const struct fetch_multipart_data *curmd; /* mutipart data iterator */ /* extract parameters from multipart post data */ curmd = ctx->multipart; while (curmd != NULL) { if (strcmp(curmd->name, "siteurl") == 0) { res = nsurl_create(curmd->value, &siteurl); if (res != NSERROR_OK) { return fetch_about_srverror(ctx); } } else if (strcmp(curmd->name, "realm") == 0) { realm = curmd->value; } else if (strcmp(curmd->name, "username") == 0) { username = curmd->value; } else if (strcmp(curmd->name, "password") == 0) { password = curmd->value; } curmd = curmd->next; } if (siteurl == NULL) { return fetch_about_srverror(ctx); } /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, 200); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/html; charset=utf-8")) { goto fetch_about_query_auth_handler_aborted; } title = messages_get("LoginTitle"); res = ssenddataf(ctx, "\n\n" "%s\n" "\n" "\n" "\n" "

%s

\n", title, title); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "
"); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = get_authentication_description(siteurl, realm, username, password, &description); if (res == NSERROR_OK) { res = ssenddataf(ctx, "

%s

", description); free(description); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } } res = ssenddataf(ctx, ""); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "" "" "" "", messages_get("Username"), username); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "" "" "" "", messages_get("Password"), password); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "
"); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "
" "" "" "
", messages_get("Login"), messages_get("Cancel")); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = nsurl_get(siteurl, NSURL_COMPLETE, &url_s, &url_l); if (res != NSERROR_OK) { url_s = strdup(""); } res = ssenddataf(ctx, "", url_s); free(url_s); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "", realm); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } res = ssenddataf(ctx, "
\n\n"); if (res != NSERROR_OK) { goto fetch_about_query_auth_handler_aborted; } fetch_about_send_finished(ctx); nsurl_unref(siteurl); return true; fetch_about_query_auth_handler_aborted: nsurl_unref(siteurl); return false; } /** * generate the description of the privacy query */ static nserror get_privacy_description(struct nsurl *url, char **out_str) { nserror res; char *url_s; size_t url_l; char *str = NULL; const char *key = "PrivacyDescription"; /* get the host in question */ res = nsurl_get(url, NSURL_HOST, &url_s, &url_l); if (res != NSERROR_OK) { return res; } /* obtain the description with the url substituted */ str = messages_get_buff(key, url_s); if ((str != NULL) && (strcmp(key, str) == 0)) { /* the returned string was simply the key */ free(str); str = NULL; } if (str == NULL) { /* failed to get suitable translated message text so * fall back to basic english. */ int slen; slen = snprintf(str, 0, privacy_description_fallback, url_s) + 1; str = malloc(slen); if (str != NULL) { snprintf(str, slen, privacy_description_fallback, url_s); } } if (str == NULL) { res = NSERROR_NOMEM; } else { *out_str = str; } free(url_s); return res; } /** * Handler to generate about scheme privacy query page * * \param ctx The fetcher context. * \return true if handled false if aborted. */ static bool fetch_about_query_privacy_handler(struct fetch_about_context *ctx) { nserror res; char *url_s; size_t url_l; const char *reason = ""; const char *title; struct nsurl *siteurl = NULL; char *description = NULL; const struct fetch_multipart_data *curmd; /* mutipart data iterator */ /* extract parameters from multipart post data */ curmd = ctx->multipart; while (curmd != NULL) { if (strcmp(curmd->name, "siteurl") == 0) { res = nsurl_create(curmd->value, &siteurl); if (res != NSERROR_OK) { return fetch_about_srverror(ctx); } } else if (strcmp(curmd->name, "reason") == 0) { reason = curmd->value; } curmd = curmd->next; } if (siteurl == NULL) { return fetch_about_srverror(ctx); } /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, 200); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/html; charset=utf-8")) { goto fetch_about_query_ssl_handler_aborted; } title = messages_get("PrivacyTitle"); res = ssenddataf(ctx, "\n\n" "%s\n" "\n" "\n" "\n" "

%s

\n", title, title); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } res = ssenddataf(ctx, "
"); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } res = get_privacy_description(siteurl, &description); if (res == NSERROR_OK) { res = ssenddataf(ctx, "

%s

", description); free(description); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } } res = ssenddataf(ctx, "

%s

", reason); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } res = ssenddataf(ctx, "
" "" "" "
", messages_get("Backtosafety"), messages_get("Proceed")); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } res = nsurl_get(siteurl, NSURL_COMPLETE, &url_s, &url_l); if (res != NSERROR_OK) { url_s = strdup(""); } res = ssenddataf(ctx, "", url_s); free(url_s); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } res = ssenddataf(ctx, "
\n\n"); if (res != NSERROR_OK) { goto fetch_about_query_ssl_handler_aborted; } fetch_about_send_finished(ctx); nsurl_unref(siteurl); return true; fetch_about_query_ssl_handler_aborted: nsurl_unref(siteurl); return false; } /* Forward declaration because this handler requires the handler table. */ static bool fetch_about_about_handler(struct fetch_about_context *ctx); /** * List of about paths and their handlers */ struct about_handlers about_handler_list[] = { { "credits", SLEN("credits"), NULL, fetch_about_credits_handler, false }, { "licence", SLEN("licence"), NULL, fetch_about_licence_handler, false }, { "license", SLEN("license"), NULL, fetch_about_licence_handler, true }, { "welcome", SLEN("welcome"), NULL, fetch_about_welcome_handler, false }, { "maps", SLEN("maps"), NULL, fetch_about_maps_handler, false }, { "config", SLEN("config"), NULL, fetch_about_config_handler, false }, { "Choices", SLEN("Choices"), NULL, fetch_about_choices_handler, false }, { "testament", SLEN("testament"), NULL, fetch_about_testament_handler, false }, { "about", SLEN("about"), NULL, fetch_about_about_handler, true }, { "logo", SLEN("logo"), NULL, fetch_about_logo_handler, true }, { /* details about the image cache */ "imagecache", SLEN("imagecache"), NULL, fetch_about_imagecache_handler, true }, { /* The default blank page */ "blank", SLEN("blank"), NULL, fetch_about_blank_handler, true }, { "query/auth", SLEN("query/auth"), NULL, fetch_about_query_auth_handler, true }, { "query/ssl", SLEN("query/ssl"), NULL, fetch_about_query_privacy_handler, true } }; #define about_handler_list_len \ (sizeof(about_handler_list) / sizeof(struct about_handlers)) /** * List all the valid about: paths available * * \param ctx The fetch context. * \return true for sucess or false to generate an error. */ static bool fetch_about_about_handler(struct fetch_about_context *ctx) { nserror res; unsigned int abt_loop = 0; /* content is going to return ok */ fetch_set_http_code(ctx->fetchh, 200); /* content type */ if (fetch_about_send_header(ctx, "Content-Type: text/html")) goto fetch_about_config_handler_aborted; res = ssenddataf(ctx, "\n\n" "NetSurf List of About pages\n" "\n" "\n" "\n" "

" "" "\"NetSurf\"" "

\n" "

NetSurf List of About pages

\n" "
    \n"); if (res != NSERROR_OK) { goto fetch_about_config_handler_aborted; } for (abt_loop = 0; abt_loop < about_handler_list_len; abt_loop++) { /* Skip over hidden entries */ if (about_handler_list[abt_loop].hidden) continue; res = ssenddataf(ctx, "
  • about:%s
  • \n", about_handler_list[abt_loop].name, about_handler_list[abt_loop].name); if (res != NSERROR_OK) { goto fetch_about_config_handler_aborted; } } res = ssenddataf(ctx, "
\n\n\n"); if (res != NSERROR_OK) { goto fetch_about_config_handler_aborted; } fetch_about_send_finished(ctx); return true; fetch_about_config_handler_aborted: return false; } /** * callback to initialise the about scheme fetcher. */ static bool fetch_about_initialise(lwc_string *scheme) { unsigned int abt_loop = 0; lwc_error error; for (abt_loop = 0; abt_loop < about_handler_list_len; abt_loop++) { error = lwc_intern_string(about_handler_list[abt_loop].name, about_handler_list[abt_loop].name_len, &about_handler_list[abt_loop].lname); if (error != lwc_error_ok) { while (abt_loop-- != 0) { lwc_string_unref(about_handler_list[abt_loop].lname); } return false; } } return true; } /** * callback to finalise the about scheme fetcher. */ static void fetch_about_finalise(lwc_string *scheme) { unsigned int abt_loop = 0; for (abt_loop = 0; abt_loop < about_handler_list_len; abt_loop++) { lwc_string_unref(about_handler_list[abt_loop].lname); } } static bool fetch_about_can_fetch(const nsurl *url) { return true; } /** * callback to set up a about scheme fetch. * * \param post_urlenc post data in urlenc format, owned by the llcache object * hence valid the entire lifetime of the fetch. * \param post_multipart post data in multipart format, owned by the llcache * object hence valid the entire lifetime of the fetch. */ static void * fetch_about_setup(struct fetch *fetchh, nsurl *url, bool only_2xx, bool downgrade_tls, const char *post_urlenc, const struct fetch_multipart_data *post_multipart, const char **headers) { struct fetch_about_context *ctx; unsigned int handler_loop; lwc_string *path; bool match; ctx = calloc(1, sizeof(*ctx)); if (ctx == NULL) return NULL; path = nsurl_get_component(url, NSURL_PATH); for (handler_loop = 0; handler_loop < about_handler_list_len; handler_loop++) { ctx->handler = about_handler_list[handler_loop].handler; if (lwc_string_isequal(path, about_handler_list[handler_loop].lname, &match) == lwc_error_ok && match) { break; } } if (path != NULL) lwc_string_unref(path); ctx->fetchh = fetchh; ctx->url = nsurl_ref(url); ctx->multipart = post_multipart; RING_INSERT(ring, ctx); return ctx; } /** * callback to free a about scheme fetch */ static void fetch_about_free(void *ctx) { struct fetch_about_context *c = ctx; nsurl_unref(c->url); RING_REMOVE(ring, c); free(ctx); } /** * callback to start an about scheme fetch */ static bool fetch_about_start(void *ctx) { return true; } /** * callback to abort a about fetch */ static void fetch_about_abort(void *ctx) { struct fetch_about_context *c = ctx; /* To avoid the poll loop having to deal with the fetch context * disappearing from under it, we simply flag the abort here. * The poll loop itself will perform the appropriate cleanup. */ c->aborted = true; } /** * callback to poll for additional about fetch contents */ static void fetch_about_poll(lwc_string *scheme) { struct fetch_about_context *c, *next; if (ring == NULL) return; /* Iterate over ring, processing each pending fetch */ c = ring; do { /* Ignore fetches that have been flagged as locked. * This allows safe re-entrant calls to this function. * Re-entrancy can occur if, as a result of a callback, * the interested party causes fetch_poll() to be called * again. */ if (c->locked == true) { next = c->r_next; continue; } /* Only process non-aborted fetches */ if (c->aborted == false) { /* about fetches can be processed in one go */ c->handler(c); } /* Compute next fetch item at the last possible moment * as processing this item may have added to the ring */ next = c->r_next; fetch_remove_from_queues(c->fetchh); fetch_free(c->fetchh); /* Advance to next ring entry, exiting if we've reached * the start of the ring or the ring has become empty */ } while ( (c = next) != ring && ring != NULL); } nserror fetch_about_register(void) { lwc_string *scheme = lwc_string_ref(corestring_lwc_about); const struct fetcher_operation_table fetcher_ops = { .initialise = fetch_about_initialise, .acceptable = fetch_about_can_fetch, .setup = fetch_about_setup, .start = fetch_about_start, .abort = fetch_about_abort, .free = fetch_about_free, .poll = fetch_about_poll, .finalise = fetch_about_finalise }; return fetcher_add(scheme, &fetcher_ops); }