//throws eHTTPNoMoreData and eHTTPOutOfBuffer
QTSS_Error RTSPRequest::ParseHeaders(StringParser& parser)
{
StrPtrLen theKeyWord;
Bool16 isStreamOK;
//Repeat until we get a \r\n\r\n, which signals the end of the headers
while ((parser.PeekFast() != '\r') && (parser.PeekFast() != '\n'))
{
//First get the header identifier
isStreamOK = parser.GetThru(&theKeyWord, ':');
if (!isStreamOK)
return QTSSModuleUtils::SendErrorResponse(this, qtssClientBadRequest, qtssMsgNoColonAfterHeader, this->GetValue(qtssRTSPReqFullRequest));
theKeyWord.TrimWhitespace();
//Look up the proper header enumeration based on the header string.
//Use the enumeration to look up the dictionary ID of this header,
//and set that dictionary attribute to be whatever is in the body of the header
UInt32 theHeader = RTSPProtocol::GetRequestHeader(theKeyWord);
StrPtrLen theHeaderVal;
parser.ConsumeUntil(&theHeaderVal, StringParser::sEOLMask);
StrPtrLen theEOL;
if ((parser.PeekFast() == '\r') || (parser.PeekFast() == '\n'))
{
isStreamOK = true;
parser.ConsumeEOL(&theEOL);
}
else
isStreamOK = false;
while((parser.PeekFast() == ' ') || (parser.PeekFast() == '\t'))
{
theHeaderVal.Len += theEOL.Len;
StrPtrLen temp;
parser.ConsumeUntil(&temp, StringParser::sEOLMask);
theHeaderVal.Len += temp.Len;
if ((parser.PeekFast() == '\r') || (parser.PeekFast() == '\n'))
{
isStreamOK = true;
parser.ConsumeEOL(&theEOL);
}
else
isStreamOK = false;
}
// If this is an unknown header, ignore it. Otherwise, set the proper
// dictionary attribute
if (theHeader != qtssIllegalHeader)
{
Assert(theHeader < qtssNumHeaders);
theHeaderVal.TrimWhitespace();
fHeaderDictionary.SetVal(theHeader, &theHeaderVal);
}
if (!isStreamOK)
return QTSSModuleUtils::SendErrorResponse(this, qtssClientBadRequest, qtssMsgNoEOLAfterHeader);
//some headers require some special processing. If this code begins
//to get out of control, we made need to come up with a function pointer table
switch (theHeader)
{
case qtssSessionHeader: ParseSessionHeader(); break;
case qtssTransportHeader: ParseTransportHeader(); break;
case qtssRangeHeader: ParseRangeHeader(); break;
case qtssIfModifiedSinceHeader: ParseIfModSinceHeader();break;
case qtssXRetransmitHeader: ParseRetransmitHeader();break;
case qtssContentLengthHeader: ParseContentLengthHeader();break;
case qtssSpeedHeader: ParseSpeedHeader(); break;
case qtssXTransportOptionsHeader: ParseTransportOptionsHeader();break;
case qtssXPreBufferHeader: ParsePrebufferHeader();break;
case qtssXDynamicRateHeader: ParseDynamicRateHeader(); break;
case qtssXRandomDataSizeHeader: ParseRandomDataSizeHeader(); break;
case qtss3GPPAdaptationHeader: fRequest3GPP.ParseAdpationHeader(&fHeaderDictionary); break;
case qtss3GPPLinkCharHeader: fRequest3GPP.ParseLinkCharHeader(&fHeaderDictionary); break;
case qtssBandwidthHeader: ParseBandwidthHeader(); break;
default: break;
}
}
// Tell the session what the request body length is for this request
// so that it can prevent people from reading past the end of the request.
StrPtrLen* theContentLengthBody = fHeaderDictionary.GetValue(qtssContentLengthHeader);
if (theContentLengthBody->Len > 0)
{
StringParser theHeaderParser(fHeaderDictionary.GetValue(qtssContentLengthHeader));
theHeaderParser.ConsumeWhitespace();
this->GetSession()->SetRequestBodyLength(theHeaderParser.ConsumeInteger(NULL));
}
isStreamOK = parser.ExpectEOL();
Assert(isStreamOK);
return QTSS_NoErr;
}
//returns: SyntaxError if there was an error in the uri. Or InternalServerError
QTSS_Error RTSPRequest::ParseURI(StringParser &parser)
{
//read in the complete URL, set it to be the qtssAbsoluteURLParam
StrPtrLen theAbsURL;
// RTSPRequestInterface::sPathURLStopConditions stop on ? as well as sURLStopConditions
parser.ConsumeUntil(&theAbsURL, sURLStopConditions );
// set qtssRTSPReqAbsoluteURL to the URL throught the path component; will be : <protocol>://<host-addr>/<path>
this->SetVal(qtssRTSPReqAbsoluteURL, &theAbsURL);
StringParser urlParser(&theAbsURL);
//we always should have a slash before the uri.
//If not, that indicates this is a full URI. Also, this could be a '*' OPTIONS request
if ((*theAbsURL.Ptr != '/') && (*theAbsURL.Ptr != '*'))
{
//if it is a full URL, store the host name off in a separate parameter
StrPtrLen theRTSPString;
urlParser.ConsumeLength(&theRTSPString, 7); //consume "rtsp://"
//assign the host field here to the proper QTSS param
StrPtrLen theHost;
urlParser.ConsumeUntil(&theHost, '/');
fHeaderDictionary.SetVal(qtssHostHeader, &theHost);
}
// don't allow non-aggregate operations indicated by a url/media track=id
// might need this for rate adapt if (qtssSetupMethod != fMethod && qtssOptionsMethod != fMethod && qtssSetParameterMethod != fMethod) // any method not a setup, options, or setparameter is not allowed to have a "/trackID=" in the url.
if (qtssSetupMethod != fMethod) // any method not a setup is not allowed to have a "/trackID=" in the url.
{
StrPtrLenDel tempCStr(theAbsURL.GetAsCString());
StrPtrLen nonaggregate(tempCStr.FindString("/trackID="));
if (nonaggregate.Len > 0) // check for non-aggregate method and return error
return QTSSModuleUtils::SendErrorResponse(this, qtssClientAggregateOptionAllowed, qtssMsgBadRTSPMethod, &theAbsURL);
}
// don't allow non-aggregate operations like a setup on a playing session
if (qtssSetupMethod == fMethod) // if it is a setup but we are playing don't allow it
{
RTSPSession* theSession = (RTSPSession*)this->GetSession();
if (theSession != NULL && theSession->IsPlaying())
return QTSSModuleUtils::SendErrorResponse(this, qtssClientAggregateOptionAllowed, qtssMsgBadRTSPMethod, &theAbsURL);
}
//
// In case there is no URI at all... we have to fake it.
static char* sSlashURI = "/";
//whatever is in this position in the URL must be the URI. Store that
//in the qtssURLParam. Confused?
UInt32 uriLen = urlParser.GetDataReceivedLen() - urlParser.GetDataParsedLen();
if (uriLen > 0)
this->SetVal(qtssRTSPReqURI, urlParser.GetCurrentPosition(), urlParser.GetDataReceivedLen() - urlParser.GetDataParsedLen());
else
//
// This might happen if there is nothing after the host at all, not even
// a '/'. This is legal (RFC 2326, Sec 3.2). If so, just pretend that there
// is a '/'
this->SetVal(qtssRTSPReqURI, sSlashURI, 1);
// parse the query string from the url if present.
// init qtssRTSPReqQueryString dictionary to an empty string
StrPtrLen queryString;
this->SetVal(qtssRTSPReqQueryString, queryString.Ptr, queryString.Len);
if ( parser.GetDataRemaining() > 0 )
{
if ( parser.PeekFast() == '?' )
{
// we've got some CGI param
parser.ConsumeLength(&queryString, 1); // toss '?'
// consume the rest of the line..
parser.ConsumeUntilWhitespace(&queryString);
this->SetVal(qtssRTSPReqQueryString, queryString.Ptr, queryString.Len);
}
}
//
// If the is a '*', return right now because '*' is not a path
// so the below functions don't make any sense.
if ((*theAbsURL.Ptr == '*') && (theAbsURL.Len == 1))
{
this->SetValue(qtssRTSPReqFilePath, 0, theAbsURL.Ptr, theAbsURL.Len, QTSSDictionary::kDontObeyReadOnly);
return QTSS_NoErr;
}
//path strings are statically allocated. Therefore, if they are longer than
//this length we won't be able to handle the request.
StrPtrLen* theURLParam = this->GetValue(qtssRTSPReqURI);
if (theURLParam->Len > RTSPRequestInterface::kMaxFilePathSizeInBytes)
return QTSSModuleUtils::SendErrorResponse(this, qtssClientBadRequest, qtssMsgURLTooLong, theURLParam);
//decode the URL, put the result in the separate buffer for the file path,
//set the file path StrPtrLen to the proper value
SInt32 theBytesWritten = StringTranslator::DecodeURL(theURLParam->Ptr, theURLParam->Len,
fFilePath, RTSPRequestInterface::kMaxFilePathSizeInBytes);
//if negative, an error occurred, reported as an QTSS_Error
//we also need to leave room for a terminator.
if ((theBytesWritten < 0) || (theBytesWritten == RTSPRequestInterface::kMaxFilePathSizeInBytes))
{
return QTSSModuleUtils::SendErrorResponse(this, qtssClientBadRequest, qtssMsgURLInBadFormat, theURLParam);
}
// Convert from a / delimited path to a local file system path
StringTranslator::DecodePath(fFilePath, theBytesWritten);
//setup the proper QTSS param
fFilePath[theBytesWritten] = '\0';
//this->SetVal(qtssRTSPReqFilePath, fFilePath, theBytesWritten);
this->SetValue(qtssRTSPReqFilePath, 0, fFilePath, theBytesWritten, QTSSDictionary::kDontObeyReadOnly);
return QTSS_NoErr;
}
