📄 codes.c
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/* HTTP response codes *//* $Id: codes.c,v 1.34.6.3 2005/04/05 21:08:42 jonas Exp $ */#ifndef _GNU_SOURCE#define _GNU_SOURCE /* Needed for asprintf() */#endif#ifdef HAVE_CONFIG_H#include "config.h"#endif#include "elinks.h"#include "cache/cache.h"#include "intl/gettext/libintl.h"#include "protocol/http/codes.h"#include "protocol/uri.h"#include "sched/connection.h"#include "sched/session.h"#include "sched/task.h"#include "terminal/terminal.h"#include "terminal/window.h"#include "util/snprintf.h"#include "viewer/text/draw.h"struct http_code { int num; unsigned char *str;};/* Source: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html */static struct http_code http_code[] = { { 100, "Continue" }, { 101, "Switching Protocols" }, { 200, "OK" }, { 201, "Created" }, { 202, "Accepted" }, { 203, "Non-Authoritative Information" }, { 204, "No Content" }, { 205, "Reset Content" }, { 206, "Partial Content" }, { 300, "Multiple Choices" }, { 301, "Moved Permanently" }, { 302, "Found" }, { 303, "See Other" }, { 304, "Not Modified" }, { 305, "Use Proxy" }, { 306, "(Unused)" }, { 307, "Temporary Redirect" }, { 400, "Bad Request" }, { 401, "Unauthorized" }, { 402, "Payment Required" }, { 403, "Forbidden" }, { 404, "Not Found" }, { 405, "Method Not Allowed" }, { 406, "Not Acceptable" }, { 407, "Proxy Authentication Required" }, { 408, "Request Timeout" }, { 409, "Conflict" }, { 410, "Gone" }, { 411, "Length Required" }, { 412, "Precondition Failed" }, { 413, "Request Entity Too Large" }, { 414, "Request-URI Too Long" }, { 415, "Unsupported Media Type" }, { 416, "Requested Range Not Satisfiable" }, { 417, "Expectation Failed" }, { 500, "Internal Server Error" }, { 501, "Not Implemented" }, { 502, "Bad Gateway" }, { 503, "Service Unavailable" }, { 504, "Gateway Timeout" }, { 505, "HTTP Version Not Supported" },};#define count(T) (sizeof(T)/sizeof(*(T)))static intcompare_http_codes(const void *key, const void *element){ int first = (long) key; int second = ((struct http_code *) element)->num; return first - second;}static unsigned char *http_code_to_string(int code){ struct http_code *element = bsearch((void *) (long) code, http_code, count(http_code), sizeof(*element), compare_http_codes); if (element) return element->str; return NULL;}/* TODO: Some short intermediate document for the 3xx messages? --pasky */static unsigned char *get_http_error_document(struct terminal *term, struct uri *uri, int code){ unsigned char *codestr = http_code_to_string(code); unsigned char *title = asprintfa(_("HTTP error %03d", term), code); struct string string; if (!codestr) codestr = "Unknown error"; if (!init_string(&string)) { mem_free_if(title); return NULL; } add_format_to_string(&string, "<html>\n" " <head><title>%s</title></head>\n" " <body>\n" " <h1 align=\"left\">%s: %s</h1>\n"#ifndef CONFIG_SMALL " <hr />\n" " <p>\n"#endif , title, title, codestr);#ifndef CONFIG_SMALL add_format_to_string(&string, _( " An error occurred on the server while fetching the document you\n" " requested. However, the server did not send back any explanation of what\n" " happenned, so it is unknown what went wrong. Please contact the web\n" " server administrator about this, if you believe that this error should\n" " not occur since it is not a nice behaviour from the web server at all\n" " and indicates that there is some much deeper problem with the web server\n" " software.\n", term)); add_format_to_string(&string, " </p>\n" " <p>\n" " URI: <a href=\"%s\">%s</a>\n", struri(uri), struri(uri));#endif add_format_to_string(&string,#ifndef CONFIG_SMALL " </p>\n" " <hr />\n"#endif " </body>\n" "</html>\n"); mem_free_if(title); return string.source;}struct http_error_info { int code; struct uri *uri;};static voidshow_http_error_document(struct session *ses, void *data){ struct http_error_info *info = data; struct terminal *term = ses->tab->term; struct cache_entry *cached = find_in_cache(info->uri); struct cache_entry *cache = cached ? cached : get_cache_entry(info->uri); unsigned char *str = NULL; if (cache) str = get_http_error_document(term, info->uri, info->code); if (str) { if (cached) delete_entry_content(cache); mem_free_set(&cache->content_type, stracpy("text/html")); add_fragment(cache, 0, str, strlen(str)); mem_free(str); draw_formatted(ses, 1); } done_uri(info->uri); mem_free(info);}voidhttp_error_document(struct connection *conn, int code){ struct http_error_info *info; assert(conn && conn->uri); info = mem_calloc(1, sizeof(*info)); if (!info) return; info->code = code; info->uri = get_uri_reference(conn->uri); add_questions_entry(show_http_error_document, info);}⌨️ 快捷键说明
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