CLOUD: Add GetClientHandler

That ClientHandler is made for responding GET requests. It calculates
stream's length, it allows to specify response code and headers, it can
be used to transfer any ReadStream.

1 files changed, 94 insertions, 0 deletions

diff --git a/backends/networking/sdl_net/getclienthandler.cpp b/backends/networking/sdl_net/getclienthandler.cpp
new file mode 100644
index 0000000000..48a03e02f9
--- /dev/null
+++ b/backends/networking/sdl_net/getclienthandler.cpp
@@ -0,0 +1,94 @@
+/* ScummVM - Graphic Adventure Engine
+*
+* ScummVM is the legal property of its developers, whose names
+* are too numerous to list here. Please refer to the COPYRIGHT
+* file distributed with this source distribution.
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+*
+*/
+
+#include "backends/networking/sdl_net/getclienthandler.h"
+#include "common/textconsole.h"
+
+namespace Networking {
+
+GetClientHandler::GetClientHandler(Common::SeekableReadStream *stream): _responseCode(200), _headersPrepared(false), _stream(stream) {}
+
+GetClientHandler::~GetClientHandler() { delete _stream; }
+
+const char *GetClientHandler::responseMessage(long responseCode) {
+	switch (responseCode) {
+	case 200: return "OK";
+	case 400: return "Bad Request";
+	case 404: return "Not Found";
+	case 500: return "Internal Server Error";
+	}
+	return "Unknown";
+}
+
+void GetClientHandler::prepareHeaders() {
+	if (!_specialHeaders.contains("Content-Type"))
+		setHeader("Content-Type", "text/html");
+
+	if (!_specialHeaders.contains("Content-Length") && _stream)
+		setHeader("Content-Length", Common::String::format("%u", _stream->size()));
+
+	_headers = Common::String::format("HTTP/1.1 %d %s\r\n", _responseCode, responseMessage(_responseCode));
+	for (Common::HashMap<Common::String, Common::String>::iterator i = _specialHeaders.begin(); i != _specialHeaders.end(); ++i)
+		_headers += i->_key + ": " + i->_value + "\r\n";
+	_headers += "\r\n";
+
+	_headersPrepared = true;
+}
+
+void GetClientHandler::handle(Client *client) {
+	if (!client) return;
+	if (!_headersPrepared) prepareHeaders();
+	
+	const int kBufSize = 16 * 1024;
+	char buf[kBufSize];
+	uint32 readBytes;
+
+	// send headers first
+	if (_headers.size() > 0) {
+		readBytes = _headers.size();
+		if (readBytes > kBufSize) readBytes = kBufSize;
+		memcpy(buf, _headers.c_str(), readBytes);
+		_headers.erase(0, readBytes);
+	} else {
+		if (!_stream) {
+			client->close();
+			return;
+		}
+
+		readBytes = _stream->read(buf, kBufSize);
+	}
+
+	if (readBytes != 0)
+		if (client->send(buf, readBytes) != readBytes) {
+			warning("GetClientHandler: unable to send all bytes to the client");
+			client->close();
+			return;
+		}
+
+	// we're done here!
+	if (_stream->eos()) client->close();
+}
+
+void GetClientHandler::setHeader(Common::String name, Common::String value) { _specialHeaders[name] = value; }
+void GetClientHandler::setResponseCode(long code) { _responseCode = code; }
+
+} // End of namespace Networking