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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/shell/application_manager/local_fetcher.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/files/file_util.h" |
| 9 #include "base/format_macros.h" |
| 10 #include "base/message_loop/message_loop.h" |
| 11 #include "base/strings/stringprintf.h" |
| 12 #include "base/strings/utf_string_conversions.h" |
| 13 #include "base/trace_event/trace_event.h" |
| 14 #include "mojo/common/common_type_converters.h" |
| 15 #include "mojo/common/data_pipe_utils.h" |
| 16 #include "mojo/common/url_type_converters.h" |
| 17 #include "url/url_util.h" |
| 18 |
| 19 namespace mojo { |
| 20 namespace shell { |
| 21 |
| 22 namespace { |
| 23 |
| 24 void IgnoreResult(bool result) { |
| 25 } |
| 26 |
| 27 } // namespace |
| 28 |
| 29 // A loader for local files. |
| 30 LocalFetcher::LocalFetcher(const GURL& url, |
| 31 const GURL& url_without_query, |
| 32 const FetchCallback& loader_callback) |
| 33 : Fetcher(loader_callback), url_(url), path_(UrlToFile(url_without_query)) { |
| 34 TRACE_EVENT1("mojo_shell", "LocalFetcher::LocalFetcher", "url", url.spec()); |
| 35 loader_callback_.Run(make_scoped_ptr(this)); |
| 36 } |
| 37 |
| 38 base::FilePath LocalFetcher::UrlToFile(const GURL& url) { |
| 39 DCHECK(url.SchemeIsFile()); |
| 40 url::RawCanonOutputW<1024> output; |
| 41 url::DecodeURLEscapeSequences(url.path().data(), |
| 42 static_cast<int>(url.path().length()), &output); |
| 43 base::string16 decoded_path = base::string16(output.data(), output.length()); |
| 44 #if defined(OS_WIN) |
| 45 base::TrimString(decoded_path, L"/", &decoded_path); |
| 46 base::FilePath path(decoded_path); |
| 47 #else |
| 48 base::FilePath path(base::UTF16ToUTF8(decoded_path)); |
| 49 #endif |
| 50 return path; |
| 51 } |
| 52 |
| 53 const GURL& LocalFetcher::GetURL() const { |
| 54 return url_; |
| 55 } |
| 56 |
| 57 GURL LocalFetcher::GetRedirectURL() const { |
| 58 return GURL::EmptyGURL(); |
| 59 } |
| 60 |
| 61 URLResponsePtr LocalFetcher::AsURLResponse(base::TaskRunner* task_runner, |
| 62 uint32_t skip) { |
| 63 URLResponsePtr response(URLResponse::New()); |
| 64 response->url = String::From(url_); |
| 65 DataPipe data_pipe; |
| 66 response->body = data_pipe.consumer_handle.Pass(); |
| 67 int64 file_size; |
| 68 if (base::GetFileSize(path_, &file_size)) { |
| 69 response->headers = Array<String>(1); |
| 70 response->headers[0] = |
| 71 base::StringPrintf("Content-Length: %" PRId64, file_size); |
| 72 } |
| 73 common::CopyFromFile(path_, data_pipe.producer_handle.Pass(), skip, |
| 74 task_runner, base::Bind(&IgnoreResult)); |
| 75 return response.Pass(); |
| 76 } |
| 77 |
| 78 void LocalFetcher::AsPath( |
| 79 base::TaskRunner* task_runner, |
| 80 base::Callback<void(const base::FilePath&, bool)> callback) { |
| 81 // Async for consistency with network case. |
| 82 base::MessageLoop::current()->PostTask( |
| 83 FROM_HERE, base::Bind(callback, path_, base::PathExists(path_))); |
| 84 } |
| 85 |
| 86 std::string LocalFetcher::MimeType() { |
| 87 return ""; |
| 88 } |
| 89 |
| 90 bool LocalFetcher::HasMojoMagic() { |
| 91 std::string magic; |
| 92 ReadFileToString(path_, &magic, strlen(kMojoMagic)); |
| 93 return magic == kMojoMagic; |
| 94 } |
| 95 |
| 96 bool LocalFetcher::PeekFirstLine(std::string* line) { |
| 97 std::string start_of_file; |
| 98 ReadFileToString(path_, &start_of_file, kMaxShebangLength); |
| 99 size_t return_position = start_of_file.find('\n'); |
| 100 if (return_position == std::string::npos) |
| 101 return false; |
| 102 *line = start_of_file.substr(0, return_position + 1); |
| 103 return true; |
| 104 } |
| 105 |
| 106 } // namespace shell |
| 107 } // namespace mojo |
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