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/*
* URL utility functions
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "internal.h"
#include "config.h"
#include "url.h"
#if CONFIG_NETWORK
#include "network.h"
#endif
#include "libavutil/avstring.h"
/**
* @file
* URL utility functions.
*/
int ff_url_join(char *str, int size, const char *proto,
const char *authorization, const char *hostname,
int port, const char *fmt, ...)
{
#if CONFIG_NETWORK
struct addrinfo hints = { 0 }, *ai;
#endif
str[0] = '\0';
if (proto)
av_strlcatf(str, size, "%s://", proto);
if (authorization && authorization[0])
av_strlcatf(str, size, "%s@", authorization);
#if CONFIG_NETWORK && defined(AF_INET6)
/* Determine if hostname is a numerical IPv6 address,
* properly escape it within [] in that case. */
hints.ai_flags = AI_NUMERICHOST;
if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
if (ai->ai_family == AF_INET6) {
av_strlcat(str, "[", size);
av_strlcat(str, hostname, size);
av_strlcat(str, "]", size);
} else {
av_strlcat(str, hostname, size);
}
freeaddrinfo(ai);
} else
#endif
/* Not an IPv6 address, just output the plain string. */
av_strlcat(str, hostname, size);
if (port >= 0)
av_strlcatf(str, size, ":%d", port);
if (fmt) {
va_list vl;
size_t len = strlen(str);
va_start(vl, fmt);
vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
va_end(vl);
}
return strlen(str);
}
static void trim_double_dot_url(char *buf, const char *rel, int size)
{
const char *p = rel;
const char *root = rel;
char tmp_path[MAX_URL_SIZE] = {0, };
char *sep;
char *node;
/* Get the path root of the url which start by "://" */
if (p && (sep = strstr(p, "://"))) {
sep += 3;
root = strchr(sep, '/');
if (!root)
return;
}
/* set new current position if the root node is changed */
p = root;
while (p && (node = strstr(p, ".."))) {
av_strlcat(tmp_path, p, node - p + strlen(tmp_path));
p = node + 3;
sep = strrchr(tmp_path, '/');
if (sep)
sep[0] = '\0';
else
tmp_path[0] = '\0';
}
if (!av_stristart(p, "/", NULL) && root != rel)
av_strlcat(tmp_path, "/", size);
av_strlcat(tmp_path, p, size);
/* start set buf after temp path process. */
av_strlcpy(buf, rel, root - rel + 1);
if (!av_stristart(tmp_path, "/", NULL) && root != rel)
av_strlcat(buf, "/", size);
av_strlcat(buf, tmp_path, size);
}
void ff_make_absolute_url(char *buf, int size, const char *base,
const char *rel)
{
char *sep, *path_query;
char *root, *p;
char tmp_path[MAX_URL_SIZE];
memset(tmp_path, 0, sizeof(tmp_path));
/* Absolute path, relative to the current server */
if (base && strstr(base, "://") && rel[0] == '/') {
if (base != buf)
av_strlcpy(buf, base, size);
sep = strstr(buf, "://");
if (sep) {
/* Take scheme from base url */
if (rel[1] == '/') {
sep[1] = '\0';
} else {
/* Take scheme and host from base url */
sep += 3;
sep = strchr(sep, '/');
if (sep)
*sep = '\0';
}
}
av_strlcat(buf, rel, size);
trim_double_dot_url(tmp_path, buf, size);
memset(buf, 0, size);
av_strlcpy(buf, tmp_path, size);
return;
}
/* If rel actually is an absolute url, just copy it */
if (!base || strstr(rel, "://") || rel[0] == '/') {
memset(buf, 0, size);
trim_double_dot_url(buf, rel, size);
return;
}
if (base != buf)
av_strlcpy(buf, base, size);
/* Strip off any query string from base */
path_query = strchr(buf, '?');
if (path_query)
*path_query = '\0';
/* Is relative path just a new query part? */
if (rel[0] == '?') {
av_strlcat(buf, rel, size);
trim_double_dot_url(tmp_path, buf, size);
memset(buf, 0, size);
av_strlcpy(buf, tmp_path, size);
return;
}
root = p = buf;
/* Get the path root of the url which start by "://" */
if (p && strstr(p, "://")) {
sep = strstr(p, "://");
if (sep) {
sep += 3;
root = strchr(sep, '/');
if (!root)
return;
}
}
/* Remove the file name from the base url */
sep = strrchr(buf, '/');
if (sep && sep <= root)
sep = root;
if (sep)
sep[1] = '\0';
else
buf[0] = '\0';
while (av_strstart(rel, "..", NULL) && sep) {
/* Remove the path delimiter at the end */
if (sep > root) {
sep[0] = '\0';
sep = strrchr(buf, '/');
}
/* If the next directory name to pop off is "..", break here */
if (!strcmp(sep ? &sep[1] : buf, "..")) {
/* Readd the slash we just removed */
av_strlcat(buf, "/", size);
break;
}
/* Cut off the directory name */
if (sep)
sep[1] = '\0';
else
buf[0] = '\0';
rel += 3;
}
av_strlcat(buf, rel, size);
trim_double_dot_url(tmp_path, buf, size);
memset(buf, 0, size);
av_strlcpy(buf, tmp_path, size);
}
AVIODirEntry *ff_alloc_dir_entry(void)
{
AVIODirEntry *entry = av_mallocz(sizeof(AVIODirEntry));
if (entry) {
entry->type = AVIO_ENTRY_UNKNOWN;
entry->size = -1;
entry->modification_timestamp = -1;
entry->access_timestamp = -1;
entry->status_change_timestamp = -1;
entry->user_id = -1;
entry->group_id = -1;
entry->filemode = -1;
}
return entry;
}
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