avf: move url utility functions in a separate file

1 files changed, 147 insertions, 0 deletions

diff --git a/libavformat/url.c b/libavformat/url.c
new file mode 100644
index 0000000000..eeda1f0297
--- /dev/null
+++ b/libavformat/url.c
@@ -0,0 +1,147 @@
+/*
+ * URL utility functions
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#include "avformat.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;
+        int len = strlen(str);
+
+        va_start(vl, fmt);
+        vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
+        va_end(vl);
+    }
+    return strlen(str);
+}
+
+void ff_make_absolute_url(char *buf, int size, const char *base,
+                          const char *rel)
+{
+    char *sep, *path_query;
+    /* 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);
+        return;
+    }
+    /* If rel actually is an absolute url, just copy it */
+    if (!base || strstr(rel, "://") || rel[0] == '/') {
+        av_strlcpy(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 != NULL)
+        *path_query = '\0';
+
+    /* Is relative path just a new query part? */
+    if (rel[0] == '?') {
+        av_strlcat(buf, rel, size);
+        return;
+    }
+
+    /* Remove the file name from the base url */
+    sep = strrchr(buf, '/');
+    if (sep)
+        sep[1] = '\0';
+    else
+        buf[0] = '\0';
+    while (av_strstart(rel, "../", NULL) && sep) {
+        /* Remove the path delimiter at the end */
+        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);
+}