mojo/fetcher/about_fetcher.cc - Issue 1563413002: Move fetchers into mojo/shell/fetcher

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Issue 1563413002: Move fetchers into mojo/shell/fetcher (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 4 years, 11 months ago

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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 "mojo/fetcher/about_fetcher.h"

6

7 #include <stdint.h>

8

9 #include <utility>

10

11 #include "base/bind.h"

12 #include "base/files/file_path.h"

13 #include "base/logging.h"

14 #include "base/memory/scoped_ptr.h"

15 #include "base/message_loop/message_loop.h"

16

17 namespace mojo {

18 namespace fetcher {

19 namespace {

20

21 void RunFetcherCallback(const shell::Fetcher::FetchCallback& callback,

22 scoped_ptr<shell::Fetcher> fetcher,

23 bool success) {

24 callback.Run(success ? std::move(fetcher) : nullptr);

25 }

26

27 } // namespace

28

29 const char AboutFetcher::kAboutScheme[] = "about";

30 const char AboutFetcher::kAboutBlankURL[] = "about:blank";

31

32 // static

33 void AboutFetcher::Start(const GURL& url,

34 const FetchCallback& loader_callback) {

35 // The object manages its own lifespan.

36 new AboutFetcher(url, loader_callback);

37 }

38

39 AboutFetcher::AboutFetcher(const GURL& url,

40 const FetchCallback& loader_callback)

41 : Fetcher(loader_callback), url_(url) {

42 BuildResponse();

43 }

44

45 AboutFetcher::~AboutFetcher() {}

46

47 void AboutFetcher::BuildResponse() {

48 response_ = URLResponse::New();

49 response_->url = url_.spec();

50

51 // about: URLs other than about:blank are not supported yet.

52 //

53 // TODO(yzshen): crbug.com/516494 Eventually we need a general solution to

54 // generate error page for network errors/unrecognized app format/etc.

55 response_->status_code = (url_ == GURL(kAboutBlankURL)) ? 200 : 404;

56

57 response_->mime_type = "text/html";

58 PostToRunCallback(true);

59 }

60

61 void AboutFetcher::PostToRunCallback(bool success) {

62 // Also pass \|this\| on failure, so that we won't destroy the object while the

63 // constructor is still on the call stack.

64 base::MessageLoop::current()->PostTask(

65 FROM_HERE,

66 base::Bind(RunFetcherCallback, loader_callback_,

67 base::Passed(make_scoped_ptr<Fetcher>(this)), success));

68 }

69

70 const GURL& AboutFetcher::GetURL() const {

71 return url_;

72 }

73

74 GURL AboutFetcher::GetRedirectURL() const {

75 return GURL::EmptyGURL();

76 }

77

78 GURL AboutFetcher::GetRedirectReferer() const {

79 return GURL::EmptyGURL();

80 }

81

82 URLResponsePtr AboutFetcher::AsURLResponse(base::TaskRunner* task_runner,

83 uint32_t skip) {

84 DCHECK(response_);

85

86 // Ignore \|skip\| because the only URL handled currently is "about:blank" which

87 // doesn't have a body.

88 DCHECK(!response_->body.is_valid());

89

90 return std::move(response_);

91 }

92

93 void AboutFetcher::AsPath(

94 base::TaskRunner* task_runner,

95 base::Callback<void(const base::FilePath&, bool)> callback) {

96 NOTIMPLEMENTED();

97 base::MessageLoop::current()->PostTask(

98 FROM_HERE, base::Bind(callback, base::FilePath(), false));

99 }

100

101 std::string AboutFetcher::MimeType() {

102 DCHECK(response_);

103 return response_->mime_type;

104 }

105

106 bool AboutFetcher::HasMojoMagic() {

107 return false;

108 }

109

110 bool AboutFetcher::PeekFirstLine(std::string* line) {

111 // The only URL handled currently is "about:blank" which doesn't have a body.

112 return false;

113 }

114

115 } // namespace fetcher

116 } // namespace mojo

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