Move fetching logic out of ApplicationManager, eliminate url mappings.

mojo/fetcher/url_resolver.cc

+// Copyright 2014 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/url_resolver.h"
+
+#include "base/base_paths.h"
+#include "base/logging.h"
+#include "base/strings/utf_string_conversions.h"
+#include "mojo/shell/query_util.h"
+#include "mojo/util/filename_util.h"
+#include "url/url_util.h"
+
+namespace mojo {
+namespace fetcher {
+
+URLResolver::URLResolver(const GURL& mojo_base_url)
+    : mojo_base_url_(util::AddTrailingSlashIfNeeded(mojo_base_url)) {
+  DCHECK(mojo_base_url_.is_valid());
+  // Needed to treat first component of mojo URLs as host, not path.
+  url::AddStandardScheme("mojo", url::SCHEME_WITHOUT_AUTHORITY);
+}
+
+URLResolver::~URLResolver() {
+}
+
+GURL URLResolver::ResolveMojoURL(const GURL& mojo_url) const {
+  if (mojo_url.scheme() != "mojo") {
+    // The mapping has produced some sort of non-mojo: URL - file:, http:, etc.
+    return mojo_url;
+  }
+
+  // It's still a mojo: URL, use the default mapping scheme.
+  std::string query;
+  GURL base_url = shell::GetBaseURLAndQuery(mojo_url, &query);
+  const std::string host = base_url.host();
+  return mojo_base_url_.Resolve(host + "/" + host + ".mojo" + query);
+}
+
+}  // namespace fetcher
+}  // namespace mojo