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netsurf/utils/useragent.c

96 lines
2.7 KiB

/*
* Copyright 2007 Daniel Silverstone <dsilvers@digital-scurf.org>
* Copyright 2007 Rob Kendrick <rjek@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "utils/config.h"
#include "utils/utsname.h"
#include "desktop/version.h"
#include "utils/log.h"
#include "utils/useragent.h"
static const char *core_user_agent_string = NULL;
#ifndef NETSURF_UA_FORMAT_STRING
#define NETSURF_UA_FORMAT_STRING "Mozilla/5.0 (%s) NetSurf/%d.%d"
#endif
/**
* Prepare core_user_agent_string with a string suitable for use as a
* user agent in HTTP requests.
*/
static void
user_agent_build_string(void)
{
struct utsname un;
const char *sysname = "Unknown";
char *ua_string;
int len;
if (uname(&un) >= 0) {
sysname = un.sysname;
if (strcmp(sysname, "Linux") == 0) {
/* Force desktop, not mobile */
sysname = "X11; Linux";
}
}
len = snprintf(NULL, 0, NETSURF_UA_FORMAT_STRING,
sysname,
netsurf_version_major,
netsurf_version_minor);
ua_string = malloc(len + 1);
if (!ua_string) {
/** \todo this needs handling better */
return;
}
snprintf(ua_string, len + 1,
NETSURF_UA_FORMAT_STRING,
sysname,
netsurf_version_major,
netsurf_version_minor);
core_user_agent_string = ua_string;
NSLOG(netsurf, INFO, "Built user agent \"%s\"",
core_user_agent_string);
}
/* This is a function so that later we can override it trivially */
const char *
user_agent_string(void)
{
if (core_user_agent_string == NULL)
user_agent_build_string();
return core_user_agent_string;
}
/* Public API documented in useragent.h */
void
free_user_agent_string(void)
{
if (core_user_agent_string != NULL) {
/* Nasty cast because we need to de-const it to free it */
free((void *)core_user_agent_string);
core_user_agent_string = NULL;
}
}