Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/fetcher/base_application_fetcher.cc

+// 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/fetcher/base_application_fetcher.h"
+
+#include "mojo/fetcher/about_fetcher.h"
+#include "mojo/fetcher/local_fetcher.h"
+#include "mojo/fetcher/network_fetcher.h"
+#include "mojo/fetcher/switches.h"
+#include "mojo/fetcher/update_fetcher.h"
+#include "mojo/shell/application_manager.h"
+#include "mojo/shell/query_util.h"
+#include "mojo/util/filename_util.h"
+#include "url/gurl.h"
+
+namespace mojo {
+namespace fetcher {
+
+BaseApplicationFetcher::BaseApplicationFetcher(
+    const base::FilePath& shell_file_root)
+    : disable_cache_(base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableCache)) {
+  GURL mojo_root_file_url =
+      util::FilePathToFileURL(shell_file_root).Resolve(std::string());
+  url_resolver_.reset(new URLResolver(mojo_root_file_url));
+}
+
+BaseApplicationFetcher::~BaseApplicationFetcher() {
+}
+
+void BaseApplicationFetcher::SetApplicationManager(
+    shell::ApplicationManager* manager) {
+  application_manager_ = manager;
+}
+
+GURL BaseApplicationFetcher::ResolveURL(const GURL& url) {
+  return url_resolver_->ResolveMojoURL(url);
+}
+
+void BaseApplicationFetcher::FetchRequest(
+    URLRequestPtr request,
+    const shell::Fetcher::FetchCallback& loader_callback) {
+  GURL url(request->url);
+  if (url.SchemeIs(AboutFetcher::kAboutScheme)) {
+    AboutFetcher::Start(url, loader_callback);
+    return;
+  }
+
+  GURL resolved_url = ResolveURL(url);
+
+  if (resolved_url.SchemeIsFile()) {
+    // LocalFetcher uses the network service to infer MIME types from URLs.
+    // Skip this for mojo URLs to avoid recursively loading the network service.
+    if (!network_service_ && !url.SchemeIs("mojo")) {
+      application_manager_->ConnectToService(GURL("mojo:network_service"),
+                                            &network_service_);
+    }
+    new LocalFetcher(

[sky, 2015/09/11 23:05:27]

It's worth a comment as to who owns the fetcher, same comment on 85.

+        network_service_.get(), resolved_url,
+        shell::GetBaseURLAndQuery(resolved_url, nullptr),
+        loader_callback);
+    return;
+  }
+
+#if 0
+  // TODO(beng): figure out how this should be integrated now that mapped_url
+  //             is toast.
+  // TODO(scottmg): to quote someone I know, if you liked this you shouldda put
+  //                a test on it.
+  if (url.SchemeIs("mojo") &&
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kUseUpdater)) {
+    application_manager_->ConnectToService(GURL("mojo:updater"), &updater_);
+    new UpdateFetcher(url, updater_.get(), loader_callback);
+    return;
+  }
+#endif
+
+  if (!url_loader_factory_) {
+    application_manager_->ConnectToService(GURL("mojo:network_service"),
+                                           &url_loader_factory_);
+  }
+
+  new NetworkFetcher(disable_cache_, request.Pass(), url_loader_factory_.get(),
+                     loader_callback);
+}
+
+}  // namespace fetcher
+}  // namespace mojo