static int httpParserOnHeaderFieldCallback()

in source/core_http_client.c [701:754]

• 34 lines of code
• 3 McCabe index (conditional complexity)

static int httpParserOnHeaderFieldCallback( http_parser * pHttpParser,
                                            const char * pLoc,
                                            size_t length )
{
    HTTPParsingContext_t * pParsingContext = NULL;
    HTTPResponse_t * pResponse = NULL;

    assert( pHttpParser != NULL );
    assert( pHttpParser->data != NULL );
    assert( pLoc != NULL );

    pParsingContext = ( HTTPParsingContext_t * ) ( pHttpParser->data );
    pResponse = pParsingContext->pResponse;

    assert( pResponse != NULL );

    /* If this is the first time httpParserOnHeaderFieldCallback() has been
     * invoked on a response, then the start of the response headers is NULL. */
    if( pResponse->pHeaders == NULL )
    {
        pResponse->pHeaders = ( const uint8_t * ) pLoc;
    }

    /* Set the location of what to parse next. */
    pParsingContext->pBufferCur = pLoc + length;

    /* The httpParserOnHeaderFieldCallback() always follows the
     * httpParserOnHeaderValueCallback() if there is another header field. When
     * httpParserOnHeaderValueCallback() is not called in succession, then a
     * complete header has been found. */
    processCompleteHeader( pParsingContext );

    /* If httpParserOnHeaderFieldCallback() is invoked in succession, then the
     * last time http_parser_execute() was called only part of the header field
     * was parsed. The indication of successive invocations is a non-NULL
     * pParsingContext->pLastHeaderField. */
    if( pParsingContext->pLastHeaderField == NULL )
    {
        pParsingContext->pLastHeaderField = pLoc;
        pParsingContext->lastHeaderFieldLen = length;
    }
    else
    {
        assert( pParsingContext->lastHeaderFieldLen <= SIZE_MAX - length );
        pParsingContext->lastHeaderFieldLen += length;
    }

    LogDebug( ( "Response parsing: Found a header field: "
                "HeaderField=%.*s",
                ( int ) length,
                pLoc ) );

    return HTTP_PARSER_CONTINUE_PARSING;
}