/* HTTP response codes */
#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 "network/connection.h"
#include "protocol/http/codes.h"
#include "protocol/uri.h"
#include "session/session.h"
#include "session/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" },
};
static int
compare_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,
sizeof_array(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,
"\n"
" %s\n"
" \n"
" %s: %s
\n"
#ifndef CONFIG_SMALL
"
\n"
" \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,
"
\n"
" \n"
" URI: %s\n", struri(uri), struri(uri));
#endif
add_format_to_string(&string,
#ifndef CONFIG_SMALL
"
\n"
"
\n"
#endif
" \n"
"\n");
mem_free_if(title);
return string.source;
}
struct http_error_info {
int code;
struct uri *uri;
};
static void
show_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);
}
void
http_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);
}