genesis-3d_engine/Engine/foundation/http/httpresponsereader.cc

/****************************************************************************
Copyright (c) 2009, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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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
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#ifdef __WIN32__


#include "stdneb.h"
#include "http/httpresponsereader.h"
#include "io/textreader.h"
#include "io/memorystream.h"

namespace Http
{
__ImplementClass(Http::HttpResponseReader, 'HTRR', IO::StreamReader);

using namespace Util;
using namespace IO;

//------------------------------------------------------------------------------
/**
*/
HttpResponseReader::HttpResponseReader() :
    isValidHttpResponse(false),
    httpStatus(HttpStatus::InvalidHttpStatus),
    contentLength(0)
{
    // empty
}

//------------------------------------------------------------------------------
/**
*/
bool
HttpResponseReader::ReadResponse()
{
    this->isValidHttpResponse = false;
    this->httpStatus = HttpStatus::InvalidHttpStatus;
    this->contentLength = 0;
    this->contentType.Clear();
    bool retval = false;
        
    // attach a text reader to our stream and parse the response header
    GPtr<TextReader> textReader = TextReader::Create();
    textReader->SetStream(this->stream);
    if (textReader->Open())
    {
        // read first line, should be "HTTP/x.x STATUSCODE STATUSSTRING"
        String headLine = textReader->ReadLine();
        Array<String> headTokens = headLine.Tokenize(" ");
        if (headTokens.Size() < 3)
        {
            // malformed response header
            return false;
        }

        // check if the HTTP version string looks alright
        if (!String::MatchPattern(headTokens[0], "HTTP/*"))
        {
            // malformed request header
            return false;
        }

        // decode the status code
        this->httpStatus = HttpStatus::FromString(headTokens[1]);
        if (HttpStatus::OK == this->httpStatus)
        {
            // decode the remaining request header lines
            bool endOfHeader = false;
            while (!textReader->Eof() && !endOfHeader)
            {
                String curLine = textReader->ReadLine();
                Array<String> tokens;
                curLine.TrimRight("\r");
                if (curLine.IsValid())
                {
                    if (String::MatchPattern(curLine, "Content-Length: *"))
                    {
                        // read content length
                        tokens = curLine.Tokenize(" :");
                        n_assert(tokens.Size() == 2);
                        this->contentLength = tokens[1].AsInt();
                    }
                    else if (String::MatchPattern(curLine, "Content-Type: *"))
                    {
                        // read content MIME type
                        tokens = curLine.Tokenize(" :");
                        n_assert(tokens.Size() == 2);
                        this->contentType.Set(tokens[1]);
                    }
                }
                else
                {
                    endOfHeader = true;
                }
            }
            retval = true;
        }
        this->isValidHttpResponse = true;
        textReader->Close();
    }
    return retval;
}

} // namespace Http

#endif