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