Move most of the component updater artifacts to update_client.

components/update_client/utils.h

+// 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.
+
+#ifndef COMPONENTS_UPDATE_CLIENT_UTILS_H_
+#define COMPONENTS_UPDATE_CLIENT_UTILS_H_
+
+#include <string>
+
+class GURL;
+
+namespace base {
+class FilePath;
+}
+
+namespace net {
+class URLFetcher;
+class URLFetcherDelegate;
+class URLRequestContextGetter;
+}
+
+namespace update_client {
+
+class Configurator;
+struct CrxComponent;
+struct CrxUpdateItem;
+
+// An update protocol request starts with a common preamble which includes
+// version and platform information for Chrome and the operating system,
+// followed by a request body, which is the actual payload of the request.
+// For example:
+//
+// <?xml version="1.0" encoding="UTF-8"?>
+// <request protocol="3.0" version="chrome-32.0.1.0"  prodversion="32.0.1.0"
+//        requestid="{7383396D-B4DD-46E1-9104-AAC6B918E792}"
+//        updaterchannel="canary" arch="x86" nacl_arch="x86-64"
+//        ADDITIONAL ATTRIBUTES>
+//   <hw physmemory="16"/>
+//   <os platform="win" version="6.1" arch="x86"/>
+//   ... REQUEST BODY ...
+// </request>
+
+// Builds a protocol request string by creating the outer envelope for
+// the request and including the request body specified as a parameter.
+// If specified, |additional_attributes| are appended as attributes of the
+// request element. The additional attributes have to be well-formed for
+// insertion in the request element.
+std::string BuildProtocolRequest(const std::string& browser_version,
+                                 const std::string& channel,
+                                 const std::string& lang,
+                                 const std::string& os_long_name,
+                                 const std::string& request_body,
+                                 const std::string& additional_attributes);
+
+// Sends a protocol request to the the service endpoint specified by |url|.
+// The body of the request is provided by |protocol_request| and it is
+// expected to contain XML data. The caller owns the returned object.
+net::URLFetcher* SendProtocolRequest(
+    const GURL& url,
+    const std::string& protocol_request,
+    net::URLFetcherDelegate* url_fetcher_delegate,
+    net::URLRequestContextGetter* url_request_context_getter);
+
+// Returns true if the url request of |fetcher| was succesful.
+bool FetchSuccess(const net::URLFetcher& fetcher);
+
+// Returns the error code which occured during the fetch. The function returns 0
+// if the fetch was successful. If errors happen, the function could return a
+// network error, an http response code, or the status of the fetch, if the
+// fetch is pending or canceled.
+int GetFetchError(const net::URLFetcher& fetcher);
+
+// Returns true if the |update_item| contains a valid differential update url.
+bool HasDiffUpdate(const CrxUpdateItem* update_item);
+
+// Returns true if the |status_code| represents a server error 5xx.
+bool IsHttpServerError(int status_code);
+
+// Deletes the file and its directory, if the directory is empty. If the
+// parent directory is not empty, the function ignores deleting the directory.
+// Returns true if the file and the empty directory are deleted.
+bool DeleteFileAndEmptyParentDirectory(const base::FilePath& filepath);
+
+// Returns the component id of the |component|. The component id is in a
+// format similar with the format of an extension id.
+std::string GetCrxComponentID(const CrxComponent& component);
+
+}  // namespace update_client
+
+#endif  // COMPONENTS_UPDATE_CLIENT_UTILS_H_