/// <summary>
/// Parses the request line of a batch operation request.
/// </summary>
/// <param name="requestLine">The request line as a string.</param>
/// <param name="httpMethod">The parsed HTTP method of the request.</param>
/// <param name="requestUri">The parsed <see cref="Uri"/> of the request.</param>
private void ParseRequestLine(string requestLine, out string httpMethod, out Uri requestUri)
{
Debug.Assert(!this.inputContext.ReadingResponse, "Must only be called for requests.");
// Batch Request: POST /Customers HTTP/1.1
// Since the uri can contain spaces, the only way to read the request url, is to
// check for first space character and last space character and anything between
// them.
int firstSpaceIndex = requestLine.IndexOf(' ');
// Check whether there are enough characters after the first space for the 2nd and 3rd segments
// (and a whitespace in between)
if (firstSpaceIndex <= 0 || requestLine.Length - 3 <= firstSpaceIndex)
{
// only 1 segment or empty first segment or not enough left for 2nd and 3rd segments
throw new ODataException(Strings.ODataBatchReaderStream_InvalidRequestLine(requestLine));
}
int lastSpaceIndex = requestLine.LastIndexOf(' ');
if (lastSpaceIndex < 0 || lastSpaceIndex - firstSpaceIndex - 1 <= 0 || requestLine.Length - 1 <= lastSpaceIndex)
{
// only 2 segments or empty 2nd or 3rd segments
// only 1 segment or empty first segment or not enough left for 2nd and 3rd segments
throw new ODataException(Strings.ODataBatchReaderStream_InvalidRequestLine(requestLine));
}
httpMethod = requestLine.Substring(0, firstSpaceIndex); // Request - Http method
string uriSegment = requestLine.Substring(firstSpaceIndex + 1, lastSpaceIndex - firstSpaceIndex - 1); // Request - Request uri
string httpVersionSegment = requestLine.Substring(lastSpaceIndex + 1); // Request - Http version
// Validate HttpVersion
if (string.CompareOrdinal(ODataConstants.HttpVersionInBatching, httpVersionSegment) != 0)
{
throw new ODataException(Strings.ODataBatchReaderStream_InvalidHttpVersionSpecified(httpVersionSegment, ODataConstants.HttpVersionInBatching));
}
// NOTE: this method will throw if the method is not recognized.
HttpUtils.ValidateHttpMethod(httpMethod);
// Validate the HTTP method when reading a request
if (this.batchStream.ChangeSetBoundary != null)
{
// allow all methods except for GET
if (HttpUtils.IsQueryMethod(httpMethod))
{
throw new ODataException(Strings.ODataBatch_InvalidHttpMethodForChangeSetRequest(httpMethod));
}
}
requestUri = new Uri(uriSegment, UriKind.RelativeOrAbsolute);
requestUri = ODataBatchUtils.CreateOperationRequestUri(requestUri, this.inputContext.MessageReaderSettings.BaseUri, this.payloadUriConverter);
}