mirror of https://github.com/FFmpeg/FFmpeg.git
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6 changed files with 186 additions and 150 deletions
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/*
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 "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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int 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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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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/* 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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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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av_strlcpy(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 != NULL) |
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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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return; |
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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) |
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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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sep[0] = '\0'; |
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sep = strrchr(buf, '/'); |
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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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} |
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