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 MediaSourceForTab(int tab_id) {
  21   return MediaSource(base::StringPrintf("%s:%d", kTabMediaUrnPrefix, tab_id));
  22 }
  23
  24 MediaSource MediaSourceForDesktop() {
  25   return MediaSource(std::string(kDesktopMediaUrn));
  26 }
  27
  28 MediaSource MediaSourceForCastApp(const std::string& app_id) {
  29   return MediaSource(kCastUrnPrefix + app_id);
  30 }
  31
  32 MediaSource MediaSourceForPresentationUrl(const std::string& presentation_url) {
  33   return MediaSource(presentation_url);
  34 }
  35
  36 bool IsMirroringMediaSource(const MediaSource& source) {
  37   return base::StartsWith(source.id(), kDesktopMediaUrn,
  38                           base::CompareCase::SENSITIVE) ||
  39          base::StartsWith(source.id(), kTabMediaUrnPrefix,
  40                           base::CompareCase::SENSITIVE);
  41 }
  42
  43 bool IsValidMediaSource(const MediaSource& source) {
  44   if (IsMirroringMediaSource(source) ||
  45       base::StartsWith(source.id(), kCastUrnPrefix,
  46                        base::CompareCase::SENSITIVE)) {
  47     return true;
  48   }
  49   GURL url(source.id());
  50   return url.is_valid() && url.SchemeIsHTTPOrHTTPS();
  51 }
  52
  53 std::string PresentationUrlFromMediaSource(const MediaSource& source) {
  54   return IsValidPresentationUrl(source.id()) ? source.id() : "";
  55 }
  56
  57 bool IsValidPresentationUrl(const std::string& url) {
  58   GURL gurl(url);
  59   return gurl.is_valid() && gurl.SchemeIsHTTPOrHTTPS();
  60 }
  61
  62 }  // namespace media_router