chrome/browser/media/router/media_source_helper.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/media/router/media_source_helper.h"
   6
   7 #include "base/strings/string_util.h"
   8 #include "base/strings/stringprintf.h"
   9 #include "chrome/browser/media/router/media_source.h"
  10 #include "url/gurl.h"
  11
  12 namespace media_router {
  13
  14 // Prefixes used to format and detect various protocols' media source URNs.
  15 // See: https://www.ietf.org/rfc/rfc3406.txt
  16 const char kTabMediaUrnPrefix[] = "urn:x-org.chromium.media:source:tab";
  17 const char kDesktopMediaUrn[] = "urn:x-org.chromium.media:source:desktop";
  18 const char kCastUrnPrefix[] = "urn:x-com.google.cast:application:";
  19
  20 MediaSource ForTabMediaSource(int tab_id) {
  21   return MediaSource(base::StringPrintf("%s:%d", kTabMediaUrnPrefix, tab_id));
  22 }
  23
  24 MediaSource ForDesktopMediaSource() {
  25   return MediaSource(std::string(kDesktopMediaUrn));
  26 }
  27
  28 // TODO(mfoltz): Remove when the TODO in
  29 // MediaSourceManager::GetDefaultMediaSource is resolved.
  30 MediaSource ForCastAppMediaSource(const std::string& app_id) {
  31   return MediaSource(kCastUrnPrefix + app_id);
  32 }
  33
  34 MediaSource ForPresentationUrl(const std::string& presentation_url) {
  35   return MediaSource(presentation_url);
  36 }
  37
  38 bool IsMirroringMediaSource(const MediaSource& source) {
  39   return StartsWithASCII(source.id(), kDesktopMediaUrn, true) ||
  40     StartsWithASCII(source.id(), kTabMediaUrnPrefix, true);
  41 }
  42
  43 bool IsValidMediaSource(const MediaSource& source) {
  44   if (IsMirroringMediaSource(source) ||
  45       StartsWithASCII(source.id(), kCastUrnPrefix, true)) {
  46     return true;
  47   }
  48   GURL url(source.id());
  49   return url.is_valid() && url.SchemeIsHTTPOrHTTPS();
  50 }
  51
  52 }  // namespace media_router