HTTP

This is a library I wrote recently for interpreting HTML requests from browsers and constructing responses. If you use this, please credit me accordingly.

This is still a work in progress. Feedback is welcome.

Features

• Parsing of HTTP requests from a browser.
• Constructing HTTP responses for sending back to a browser.
• "Basic" authentication handling.
• URI parsing utilities.
• WebSocket support.

Compatibility

• This code doesn't handle the WebSocket handshake hashing; you'll need to provide your own. See below.
• This was written and tested on Windows 8 and Visual Studio 11 Beta, but there shouldn't be any issues with other compilers.
• Some munging may be required for Linux, but there's no code that can't be easily ported.
• It does depend on std::string and std::map.
• This uses C++11, but only for minor stuff.

Disclaimer

• I release this without any promises of functionality or warranty.
• This code is in no way affiliated with or endorsed by Microsoft.
• I'm happy to be contacted if you have problems with any of this code.

Copyright (C) 2013 Peter J. B. Lewis

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Credits

• The Base64 encoding and decoding was taken from http://www.adp-gmbh.ch/win/misc/webserver.html

WebSocket Handshake Hashing

Currently I'm using a third party hashing library that isn't mine to distribute, but I can recommend the smallsha1 code found at http://code.google.com/p/smallsha1/.

Integrate it with this library by using the following code to build your response to the Websocket handshake:

HTTP::HashFunc hashFunc = [] (LPCSTR pStrIn, LPUINT pHashOut)
{
	SHA1 hash;
	hash << pStrIn;
	hash.Result((unsigned*) pHashOut);
};

HTTP::BuildWebsocketRequestResponse(
	request,
	hashFunc,
	&responseHeader);