mojo/shell/update_fetcher.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 "mojo/shell/update_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 "mojo/common/common_type_converters.h"
  13 #include "mojo/common/data_pipe_utils.h"
  14 #include "mojo/common/url_type_converters.h"
  15
  16 namespace mojo {
  17 namespace shell {
  18
  19 namespace {
  20
  21 void IgnoreResult(bool result) {
  22 }
  23
  24 }  // namespace
  25 UpdateFetcher::UpdateFetcher(const GURL& url,
  26                              updater::Updater* updater,
  27                              const FetchCallback& loader_callback)
  28     : Fetcher(loader_callback), url_(url), weak_ptr_factory_(this) {
  29   DVLOG(1) << "updating: " << url_;
  30   updater->GetPathForApp(
  31       url.spec(),
  32       base::Bind(&UpdateFetcher::OnGetAppPath, weak_ptr_factory_.GetWeakPtr()));
  33 }
  34
  35 UpdateFetcher::~UpdateFetcher() {
  36 }
  37
  38 const GURL& UpdateFetcher::GetURL() const {
  39   return url_;
  40 }
  41
  42 GURL UpdateFetcher::GetRedirectURL() const {
  43   return GURL::EmptyGURL();
  44 }
  45
  46 GURL UpdateFetcher::GetRedirectReferer() const {
  47   return GURL::EmptyGURL();
  48 }
  49 URLResponsePtr UpdateFetcher::AsURLResponse(base::TaskRunner* task_runner,
  50                                             uint32_t skip) {
  51   URLResponsePtr response(URLResponse::New());
  52   response->url = String::From(url_);
  53   DataPipe data_pipe;
  54   response->body = data_pipe.consumer_handle.Pass();
  55   int64 file_size;
  56   if (base::GetFileSize(path_, &file_size)) {
  57     response->headers = Array<HttpHeaderPtr>(1);
  58     HttpHeaderPtr header = HttpHeader::New();
  59     header->name = "Content-Length";
  60     header->value = base::StringPrintf("%" PRId64, file_size);
  61     response->headers[0] = header.Pass();
  62   }
  63   common::CopyFromFile(path_, data_pipe.producer_handle.Pass(), skip,
  64                        task_runner, base::Bind(&IgnoreResult));
  65   return response.Pass();
  66 }
  67
  68 void UpdateFetcher::AsPath(
  69     base::TaskRunner* task_runner,
  70     base::Callback<void(const base::FilePath&, bool)> callback) {
  71   base::MessageLoop::current()->PostTask(
  72       FROM_HERE, base::Bind(callback, path_, base::PathExists(path_)));
  73 }
  74
  75 std::string UpdateFetcher::MimeType() {
  76   return "";
  77 }
  78
  79 bool UpdateFetcher::HasMojoMagic() {
  80   std::string magic;
  81   ReadFileToString(path_, &magic, strlen(kMojoMagic));
  82   return magic == kMojoMagic;
  83 }
  84
  85 bool UpdateFetcher::PeekFirstLine(std::string* line) {
  86   std::string start_of_file;
  87   ReadFileToString(path_, &start_of_file, kMaxShebangLength);
  88   size_t return_position = start_of_file.find('\n');
  89   if (return_position == std::string::npos)
  90     return false;
  91   *line = start_of_file.substr(0, return_position + 1);
  92   return true;
  93 }
  94
  95 void UpdateFetcher::OnGetAppPath(const mojo::String& path) {
  96   path_ = base::FilePath::FromUTF8Unsafe(path);
  97   loader_callback_.Run(make_scoped_ptr(this));
  98 }
  99
 100 }  // namespace shell
 101 }  // namespace mojo