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res_http_media_cache.c: Parse media URLs to find extensions.

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Use cURL's URL parsing API, falling back to the urlparser library, to
parse playback URLs in order to find their file extensions.

For backwards compatibility, we first look at the full URL, then at
any Content-Type header, and finally at just the path portion of the
URL.

ASTERISK-27871 #close

Change-Id: I16d0682f6d794be96539261b3e48f237909139cb
This commit is contained in:
Sean Bright
2021-07-02 11:15:05 -04:00
committed by Joshua Colp
parent 785e4afc20
commit d568326807
3 changed files with 276 additions and 51 deletions
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61
main/media_cache.c
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@@ -124,24 +124,6 @@ static void media_cache_item_del_from_astdb(struct ast_bucket_file *bucket_file)
ast_free(hash_value);
}
/*!
* \internal
* \brief Normalize the value of a Content-Type header
*
* This will trim off any optional parameters after the type/subtype.
*/
static void normalize_content_type_header(char *content_type)
{
char *params = strchr(content_type, ';');
if (params) {
*params-- = 0;
while (params > content_type && (*params == ' ' || *params == '\t')) {
*params-- = 0;
}
}
}
/*!
* \internal
* \brief Update the name of the file backing a \c bucket_file
@@ -150,47 +132,24 @@ static void normalize_content_type_header(char *content_type)
static void bucket_file_update_path(struct ast_bucket_file *bucket_file,
const char *preferred_file_name)
{
char *ext;
if (!ast_strlen_zero(preferred_file_name) && strcmp(bucket_file->path, preferred_file_name)) {
/* Use the preferred file name if available */
rename(bucket_file->path, preferred_file_name);
ast_copy_string(bucket_file->path, preferred_file_name,
sizeof(bucket_file->path));
} else if (!strchr(bucket_file->path, '.') && (ext = strrchr(ast_sorcery_object_get_id(bucket_file), '.'))) {
/* If we don't have a file extension and were provided one in the URI, use it */
char found_ext[32];
char new_path[PATH_MAX + sizeof(found_ext)];
} else if (!strchr(bucket_file->path, '.')) {
struct ast_bucket_metadata *ext =
ast_bucket_file_metadata_get(bucket_file, "ext");
ast_bucket_file_metadata_set(bucket_file, "ext", ext);
/* Don't pass '.' while checking for supported extension */
if (!ast_get_format_for_file_ext(ext + 1)) {
/* If the file extension passed in the URI isn't supported check for the
* extension based on the MIME type passed in the Content-Type header before
* giving up.
* If a match is found then retrieve the extension from the supported list
* corresponding to the mime-type and use that to rename the file */
struct ast_bucket_metadata *header = ast_bucket_file_metadata_get(bucket_file, "content-type");
if (header) {
char *mime_type = ast_strdup(header->value);
if (mime_type) {
normalize_content_type_header(mime_type);
if (!ast_strlen_zero(mime_type)) {
if (ast_get_extension_for_mime_type(mime_type, found_ext, sizeof(found_ext))) {
ext = found_ext;
}
}
ast_free(mime_type);
}
ao2_ref(header, -1);
if (ext) {
char *new_path;
if (ast_asprintf(&new_path, "%s%s", bucket_file->path, ext->value) != -1) {
rename(bucket_file->path, new_path);
ast_copy_string(bucket_file->path, new_path, sizeof(bucket_file->path));
ast_free(new_path);
}
ao2_ref(ext, -1);
}
snprintf(new_path, sizeof(new_path), "%s%s", bucket_file->path, ext);
rename(bucket_file->path, new_path);
ast_copy_string(bucket_file->path, new_path, sizeof(bucket_file->path));
}
}