CLOUD: Add Reader sketch

That should be part of the Client, I guess. Reader is not ready to
continue reading from place it stopped, but it already works as it
should for the case when whole content is available.

3 files changed, 294 insertions, 0 deletions

diff --git a/backends/networking/sdl_net/localwebserver.cpp b/backends/networking/sdl_net/localwebserver.cpp
index 2880c67d2b..cac7dab8ac 100644
--- a/backends/networking/sdl_net/localwebserver.cpp
+++ b/backends/networking/sdl_net/localwebserver.cpp
@@ -30,6 +30,7 @@
 #include "common/timer.h"
 #include "common/textconsole.h"
 #include <SDL/SDL_net.h>
+#include "reader.h"
 
 namespace Common {
 class MemoryReadWriteStream;
@@ -47,6 +48,9 @@ LocalWebserver::LocalWebserver(): _set(nullptr), _serverSocket(nullptr), _timerS
 	addPathHandler("/create", _createDirectoryHandler.getHandler());
 	addPathHandler("/download", _downloadFileHandler.getHandler());
 	_defaultHandler = _resourceHandler.getHandler();
+
+	Reader reader;
+	reader.readResponse();
 }
 
 LocalWebserver::~LocalWebserver() {
diff --git a/backends/networking/sdl_net/reader.cpp b/backends/networking/sdl_net/reader.cpp
new file mode 100644
index 0000000000..edfaf81874
--- /dev/null
+++ b/backends/networking/sdl_net/reader.cpp
@@ -0,0 +1,220 @@
+/* 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.
+*
+*/
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/networking/sdl_net/reader.h"
+#include <common/debug.h>
+
+namespace Networking {
+
+Reader::Reader() {
+	_contentLength = 0;
+	_availableBytes = 0;
+
+	_window = nullptr;
+	_windowUsed = 0;
+	_windowSize = 0;
+
+	_content =
+		"POST /upload HTTP/1.1\r\n" \
+		"Host: 127.0.0.1:12345\r\n" \
+		"User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0\r\n" \
+		"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n" \
+		"Accept-Language: ru,en-US;q=0.7,en;q=0.3\r\n" \
+		"Accept-Encoding: gzip, deflate\r\n" \
+		"Referer: http://127.0.0.1:12345/files\r\n" \
+		"Connection: keep-alive\r\n" \
+		"Content-Type: multipart/form-data; boundary=---------------------------93411339527546\r\n" \
+		"Content-Length: 319\r\n" \
+		"\r\n" \
+		"-----------------------------93411339527546\r\n" \
+		"Content-Disposition: form-data; name=\"path\"\r\n" \
+		"\r\n" \
+		"/root\r\n" \
+		"-----------------------------93411339527546\r\n" \
+		"Content-Disposition: form-data; name=\"upload_file\"; filename=\"irc.txt\"\r\n" \
+		"Content-Type: text/plain\r\n" \
+		"\r\n" \
+		"shells.fnordserver.eu/1400\r\n" \
+		"-----------------------------93411339527546--";
+}
+
+Reader::~Reader() {}
+
+void Reader::readResponse() {
+	while (true) {
+		readHeaders(); //til "\r\n\r\n"
+		readContent(); //til "--" + _boundary
+		if (_availableBytes >= 2) {
+			Common::String bts;
+			bts += readOne();
+			bts += readOne();
+			if (bts == "--") break;
+			if (bts == "\r\n") continue;
+			warning("strange bytes: \"%s\"", bts);
+		} else {
+			warning("strange ending");
+			break;
+		}
+	}	
+	if (_availableBytes > 0) debug("STRANGE END: %llu bytes left", _availableBytes);
+	else debug("END");
+}
+
+void Reader::readHeaders() {
+	Common::String boundary = "\r\n\r\n";
+	makeWindow(boundary.size());
+
+	Common::String headers = "";
+	while (readOneByteInString(headers, boundary));
+	handleHeaders(headers);
+}
+
+namespace {
+void readFromThatUntilLineEnd(const char *cstr, Common::String needle, Common::String &result) {
+	const char *position = strstr(cstr, needle.c_str());
+
+	if (position) {
+		char c;
+		for (const char *i = position + needle.size(); c = *i, c != 0; ++i) {
+			if (c == '\n' || c == '\r') break;
+			result += c;
+		}
+	}
+}
+}
+
+void Reader::handleHeaders(Common::String headers) {
+	debug("\nHANDLE HEADERS:\n>>%s<<", headers.c_str());
+	if (_boundary.empty()) {
+		//TODO: parse method, path, query, fragment
+
+		//find boundary
+		_boundary = "";
+		readFromThatUntilLineEnd(headers.c_str(), "boundary=", _boundary);
+
+		//find content length
+		Common::String contentLength = "";
+		readFromThatUntilLineEnd(headers.c_str(), "Content-Length: ", contentLength);
+		_contentLength = contentLength.asUint64();
+		_availableBytes = _contentLength;
+		debug("BOUNDARY: %s", _boundary.c_str());
+		debug("LENGTH: %llu", _contentLength);
+	} else {
+		//find field name
+		_currentFieldName = "";
+		readFromThatUntilLineEnd(headers.c_str(), "name=\"", _currentFieldName);
+		for (uint32 i = 0; i < _currentFieldName.size(); ++i)
+			if (_currentFieldName[i] == '\"') {
+				_currentFieldName.erase(i);
+				break;
+			}
+		debug("FIELD NAME: >>%s<<", _currentFieldName.c_str());
+
+		//find out field type
+		//_fieldIsFile = true;
+	}
+}
+
+void Reader::readContent() {
+	Common::String boundary = "--" + _boundary;
+	makeWindow(boundary.size());
+
+	/*
+	if (_fieldIsFile) {
+		//create temporary file
+		tempFileName = generateTempFileName();
+		stream = openFileStream(tempFileName);
+		//read till "--" + _boundary
+		while (readOneByteInStream(stream));
+		handleFileContent(tempFileName);
+	} else {
+	*/
+		Common::String buffer = "";
+		while (readOneByteInString(buffer, boundary)) ;
+		handleValueContent(buffer);
+	//}
+}
+
+void Reader::handleFileContent(Common::String filename) {
+	_attachedFiles[_currentFieldName] = filename;
+}
+
+void Reader::handleValueContent(Common::String value) {
+	debug("\nHANDLE CONTENT:\n>>%s<<", value.c_str());
+	_fields[_currentFieldName] = value;
+}
+
+void Reader::makeWindow(uint32 size) {
+	delete[] _window;
+	_window = nullptr;
+
+	_window = new byte[size];
+	_windowUsed = 0;
+	_windowSize = size;
+}
+
+/*
+bool Reader::readOneByteInStream(stream) {
+	b = read(1);
+	_window[_windowUsed++] = b;
+	if (_windowUsed < _windowSize) return true;
+
+	//when window is filled, check whether that's the boundary
+	if (_window == "--" + _boundary)
+		return false;
+
+	//if not, write the first byte of the window to the stream
+	stream.write(_window[0]);
+	for (uint32 i = 1; i < _windowSize; ++i)
+		_window[i - 1] = _window[i];
+	--_windowUsed;
+	return true;
+}
+*/
+
+bool Reader::readOneByteInString(Common::String &buffer, const Common::String &boundary) {
+	byte b = readOne();
+	_window[_windowUsed++] = b;
+	if (_windowUsed < _windowSize) return true;
+
+	//when window is filled, check whether that's the boundary
+	if (Common::String((char *)_window, _windowSize) == boundary)
+		return false;
+
+	//if not, add the first byte of the window to the string
+	buffer += _window[0];
+	for (uint32 i = 1; i < _windowSize; ++i)
+		_window[i - 1] = _window[i];
+	--_windowUsed;
+	return true;
+}
+
+byte Reader::readOne() {
+	byte b = _content[0];
+	_content.deleteChar(0);
+	--_availableBytes;
+	return b;
+}
+
+} // End of namespace Networking
diff --git a/backends/networking/sdl_net/reader.h b/backends/networking/sdl_net/reader.h
new file mode 100644
index 0000000000..d4f9e11f0b
--- /dev/null
+++ b/backends/networking/sdl_net/reader.h
@@ -0,0 +1,70 @@
+/* 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.
+*
+*/
+
+#ifndef BACKENDS_NETWORKING_SDL_NET_READER_H
+#define BACKENDS_NETWORKING_SDL_NET_READER_H
+
+#include "common/scummsys.h"
+#include "common/str.h"
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+
+namespace Networking {
+
+class Reader {
+	///Common::String _headers;
+	///Common::String _method, _path, _query, _anchor;
+	Common::String _content;
+
+	Common::String _boundary;
+	uint32 _contentLength;
+	uint32 _availableBytes;
+
+	Common::String _currentFieldName;
+	Common::HashMap<Common::String, Common::String> _fields;
+	Common::HashMap<Common::String, Common::String> _attachedFiles;
+
+	byte *_window;
+	uint32 _windowUsed, _windowSize;
+
+	void readHeaders();
+	void readContent();
+	void handleHeaders(Common::String headers);
+	void handleFileContent(Common::String filename);
+	void handleValueContent(Common::String value);
+
+	void makeWindow(uint32 size);
+	///bool Reader::readOneByteInStream(stream);
+	bool Reader::readOneByteInString(Common::String &buffer, const Common::String &boundary);
+
+	byte readOne();
+
+public:
+	Reader();
+	~Reader();
+
+	void readResponse();
+};
+
+} // End of namespace Networking
+
+#endif