Added GetRequestData() method to simplify HTTP request handlers
Added a utility function libwebserv::GetRequestData() to read
the request body asynchronously into memory and invoke a callback
when all the data is read and available. This greatly simplifies
implementation of some of request handlers that don't work with large
requests and need to read and process the data immediately.
Change-Id: I48588449c77f4362db95fb77a89d382c5ddfaec7
diff --git a/libwebserv/request_utils.h b/libwebserv/request_utils.h
new file mode 100644
index 0000000..c825c3c
--- /dev/null
+++ b/libwebserv/request_utils.h
@@ -0,0 +1,53 @@
+// Copyright 2015 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef WEBSERVER_LIBWEBSERV_REQUEST_UTILS_H_
+#define WEBSERVER_LIBWEBSERV_REQUEST_UTILS_H_
+
+#include <memory>
+#include <vector>
+
+#include <base/callback_forward.h>
+#include <chromeos/errors/error.h>
+#include <libwebserv/export.h>
+
+namespace libwebserv {
+
+class Request;
+class Response;
+
+using GetRequestDataSuccessCallback =
+ base::Callback<void(std::unique_ptr<Request> request,
+ std::unique_ptr<Response> response,
+ std::vector<uint8_t> data)>;
+
+using GetRequestDataErrorCallback =
+ base::Callback<void(std::unique_ptr<Request> request,
+ std::unique_ptr<Response> response,
+ const chromeos::Error* error)>;
+
+// Reads the request data from |request| asynchronously and returns the data
+// by calling |success_callback|. If an error occurred, |error_callback| is
+// invoked with the error information passed into |error| parameter.
+// The function takes ownership of the request and response objects for the
+// duration of operation and returns them back via the callbacks.
+LIBWEBSERV_EXPORT void GetRequestData(
+ std::unique_ptr<Request> request,
+ std::unique_ptr<Response> response,
+ const GetRequestDataSuccessCallback& success_callback,
+ const GetRequestDataErrorCallback& error_callback);
+
+} // namespace libwebserv
+
+#endif // WEBSERVER_LIBWEBSERV_REQUEST_UTILS_H_