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/* 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/str.h"
#include "common/hashmap.h"
#include "common/hash-str.h"
namespace Common {
class MemoryReadWriteStream;
class WriteStream;
}
namespace Networking {
enum ReaderState {
RS_NONE,
RS_READING_HEADERS,
RS_READING_CONTENT
};
/**
* This is a helper class for Client.
*
* It parses HTTP request and finds headers
* and content. It also supports POST form/multipart.
*
* One might pass the request even byte by byte,
* Reader will always be able to continue from the
* state it stopped on.
*
* Main headers/content must be read with
* readFirstHeaders() and readFirstContent() methods.
* Further headers/content blocks (POST form/multipart)
* must be read with readBlockHeaders() and readBlockContent().
*
* Main headers and parsed URL components could be accessed
* with special methods after reading.
*
* To use the object, call setContent() and then one of those
* reading methods. It would return whether reading is over
* or not. If reading is over, content stream still could
* contain bytes to read with other methods.
*
* If reading is not over, Reader awaits you to call the
* same reading method when you'd get more content.
*
* If it's over, you should check whether Reader awaits
* more content with noMoreContent() and call the other
* reading method, if it is. When headers are read, one
* must read contents, and vice versa.
*/
class Reader {
ReaderState _state;
Common::MemoryReadWriteStream *_content;
uint32 _bytesLeft;
byte *_window;
uint32 _windowUsed, _windowSize;
Common::MemoryReadWriteStream *_headersStream;
Common::String _headers;
Common::String _method, _path, _query, _anchor;
Common::HashMap<Common::String, Common::String> _queryParameters;
uint32 _contentLength;
Common::String _boundary;
uint32 _availableBytes;
bool _firstBlock;
bool _isBadRequest;
bool _allContentRead;
void cleanup();
bool readAndHandleFirstHeaders(); //true when ended reading
bool readBlockHeadersIntoStream(Common::WriteStream *stream); //true when ended reading
bool readContentIntoStream(Common::WriteStream *stream); //true when ended reading
void handleFirstHeaders(Common::MemoryReadWriteStream *headers);
void parseFirstLine(const Common::String &headers);
void parsePathQueryAndAnchor(Common::String path);
void parseQueryParameters();
void makeWindow(uint32 size);
void freeWindow();
bool readOneByteInStream(Common::WriteStream *stream, const Common::String &boundary);
byte readOne();
uint32 bytesLeft() const;
public:
static const uint32 SUSPICIOUS_HEADERS_SIZE = 1024 * 1024; // 1 MB is really a lot
Reader();
~Reader();
Reader &operator=(Reader &r);
bool readFirstHeaders(); //true when ended reading
bool readFirstContent(Common::WriteStream *stream); //true when ended reading
bool readBlockHeaders(Common::WriteStream *stream); //true when ended reading
bool readBlockContent(Common::WriteStream *stream); //true when ended reading
void setContent(Common::MemoryReadWriteStream *stream);
bool badRequest() const;
bool noMoreContent() const;
Common::String headers() const;
Common::String method() const;
Common::String path() const;
Common::String query() const;
Common::String queryParameter(Common::String name) const;
Common::String anchor() const;
static Common::String readEverythingFromMemoryStream(Common::MemoryReadWriteStream *stream);
};
} // End of namespace Networking
#endif
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