mirror of
https://github.com/libretro/scummvm.git
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144 lines
4.4 KiB
C++
144 lines
4.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef BACKENDS_NETWORKING_SDL_NET_READER_H
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#define BACKENDS_NETWORKING_SDL_NET_READER_H
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#include "common/str.h"
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#include "common/hashmap.h"
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#include "common/hash-str.h"
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namespace Common {
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class MemoryReadWriteStream;
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class WriteStream;
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}
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namespace Networking {
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enum ReaderState {
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RS_NONE,
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RS_READING_HEADERS,
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RS_READING_CONTENT
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};
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/**
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* This is a helper class for Client.
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*
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* It parses HTTP request and finds headers
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* and content. It also supports POST form/multipart.
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*
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* One might pass the request even byte by byte,
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* Reader will always be able to continue from the
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* state it stopped on.
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*
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* Main headers/content must be read with
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* readFirstHeaders() and readFirstContent() methods.
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* Further headers/content blocks (POST form/multipart)
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* must be read with readBlockHeaders() and readBlockContent().
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*
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* Main headers and parsed URL components could be accessed
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* with special methods after reading.
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*
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* To use the object, call setContent() and then one of those
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* reading methods. It would return whether reading is over
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* or not. If reading is over, content stream still could
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* contain bytes to read with other methods.
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*
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* If reading is not over, Reader awaits you to call the
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* same reading method when you'd get more content.
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*
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* If it's over, you should check whether Reader awaits
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* more content with noMoreContent() and call the other
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* reading method, if it is. When headers are read, one
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* must read contents, and vice versa.
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*/
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class Reader {
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ReaderState _state;
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Common::MemoryReadWriteStream *_content;
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uint32 _bytesLeft;
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byte *_window;
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uint32 _windowUsed, _windowSize, _windowReadPosition, _windowWritePosition;
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uint32 _windowHash;
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Common::MemoryReadWriteStream *_headersStream;
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Common::String _headers;
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Common::String _method, _path, _query, _anchor;
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Common::HashMap<Common::String, Common::String> _queryParameters;
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uint32 _contentLength;
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Common::String _boundary;
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uint32 _availableBytes;
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bool _firstBlock;
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bool _isBadRequest;
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bool _allContentRead;
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void cleanup();
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bool readAndHandleFirstHeaders(); //true when ended reading
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bool readBlockHeadersIntoStream(Common::WriteStream *stream); //true when ended reading
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bool readContentIntoStream(Common::WriteStream *stream); //true when ended reading
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void handleFirstHeaders(Common::MemoryReadWriteStream *headers);
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void parseFirstLine(const Common::String &headers);
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void parsePathQueryAndAnchor(Common::String pathToParse);
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void parseQueryParameters();
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void makeWindow(uint32 size);
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void freeWindow();
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bool readOneByteInStream(Common::WriteStream *stream, const Common::String &boundary, const uint32 boundaryHash);
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byte readOne();
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uint32 bytesLeft() const;
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public:
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static const int32 SUSPICIOUS_HEADERS_SIZE = 1024 * 1024; // 1 MB is really a lot
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Reader();
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~Reader();
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Reader &operator=(Reader &r);
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bool readFirstHeaders(); //true when ended reading
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bool readFirstContent(Common::WriteStream *stream); //true when ended reading
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bool readBlockHeaders(Common::WriteStream *stream); //true when ended reading
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bool readBlockContent(Common::WriteStream *stream); //true when ended reading
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void setContent(Common::MemoryReadWriteStream *stream);
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bool badRequest() const;
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bool noMoreContent() const;
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Common::String headers() const;
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Common::String method() const;
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Common::String path() const;
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Common::String query() const;
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Common::String queryParameter(Common::String name) const;
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Common::String anchor() const;
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static Common::String readEverythingFromMemoryStream(Common::MemoryReadWriteStream *stream);
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};
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} // End of namespace Networking
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#endif
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