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Diffstat (limited to 'backends/networking/sdl_net/reader.h')
| -rw-r--r-- | backends/networking/sdl_net/reader.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/backends/networking/sdl_net/reader.h b/backends/networking/sdl_net/reader.h new file mode 100644 index 0000000000..1a60e7a58d --- /dev/null +++ b/backends/networking/sdl_net/reader.h @@ -0,0 +1,143 @@ +/* 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 |