Revert of Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/shell/update_fetcher.cc

Index: mojo/shell/update_fetcher.cc
diff --git a/mojo/shell/update_fetcher.cc b/mojo/shell/update_fetcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5e1d434f261885b53418db926dddbe37d0315bd5
--- /dev/null
+++ b/mojo/shell/update_fetcher.cc
@@ -0,0 +1,101 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/shell/update_fetcher.h"
+
+#include "base/bind.h"
+#include "base/files/file_util.h"
+#include "base/format_macros.h"
+#include "base/message_loop/message_loop.h"
+#include "base/strings/stringprintf.h"
+#include "mojo/common/common_type_converters.h"
+#include "mojo/common/data_pipe_utils.h"
+#include "mojo/common/url_type_converters.h"
+
+namespace mojo {
+namespace shell {
+
+namespace {
+
+void IgnoreResult(bool result) {
+}
+
+}  // namespace
+UpdateFetcher::UpdateFetcher(const GURL& url,
+                             updater::Updater* updater,
+                             const FetchCallback& loader_callback)
+    : Fetcher(loader_callback), url_(url), weak_ptr_factory_(this) {
+  DVLOG(1) << "updating: " << url_;
+  updater->GetPathForApp(
+      url.spec(),
+      base::Bind(&UpdateFetcher::OnGetAppPath, weak_ptr_factory_.GetWeakPtr()));
+}
+
+UpdateFetcher::~UpdateFetcher() {
+}
+
+const GURL& UpdateFetcher::GetURL() const {
+  return url_;
+}
+
+GURL UpdateFetcher::GetRedirectURL() const {
+  return GURL::EmptyGURL();
+}
+
+GURL UpdateFetcher::GetRedirectReferer() const {
+  return GURL::EmptyGURL();
+}
+URLResponsePtr UpdateFetcher::AsURLResponse(base::TaskRunner* task_runner,
+                                            uint32_t skip) {
+  URLResponsePtr response(URLResponse::New());
+  response->url = String::From(url_);
+  DataPipe data_pipe;
+  response->body = data_pipe.consumer_handle.Pass();
+  int64 file_size;
+  if (base::GetFileSize(path_, &file_size)) {
+    response->headers = Array<HttpHeaderPtr>(1);
+    HttpHeaderPtr header = HttpHeader::New();
+    header->name = "Content-Length";
+    header->value = base::StringPrintf("%" PRId64, file_size);
+    response->headers[0] = header.Pass();
+  }
+  common::CopyFromFile(path_, data_pipe.producer_handle.Pass(), skip,
+                       task_runner, base::Bind(&IgnoreResult));
+  return response.Pass();
+}
+
+void UpdateFetcher::AsPath(
+    base::TaskRunner* task_runner,
+    base::Callback<void(const base::FilePath&, bool)> callback) {
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE, base::Bind(callback, path_, base::PathExists(path_)));
+}
+
+std::string UpdateFetcher::MimeType() {
+  return "";
+}
+
+bool UpdateFetcher::HasMojoMagic() {
+  std::string magic;
+  ReadFileToString(path_, &magic, strlen(kMojoMagic));
+  return magic == kMojoMagic;
+}
+
+bool UpdateFetcher::PeekFirstLine(std::string* line) {
+  std::string start_of_file;
+  ReadFileToString(path_, &start_of_file, kMaxShebangLength);
+  size_t return_position = start_of_file.find('\n');
+  if (return_position == std::string::npos)
+    return false;
+  *line = start_of_file.substr(0, return_position + 1);
+  return true;
+}
+
+void UpdateFetcher::OnGetAppPath(const mojo::String& path) {
+  path_ = base::FilePath::FromUTF8Unsafe(path);
+  loader_callback_.Run(make_scoped_ptr(this));
+}
+
+}  // namespace shell
+}  // namespace mojo