private static HttpRequestMessage CreateHttpRequestMessage(
string uriScheme,
HttpUnsortedRequest httpRequest,
Stream contentStream,
int rewind
)
{
Contract.Assert(uriScheme != null, "URI scheme must be non null");
Contract.Assert(httpRequest != null, "httpRequest must be non null");
Contract.Assert(contentStream != null, "contentStream must be non null");
HttpRequestMessage httpRequestMessage = new HttpRequestMessage();
// Set method, requestURI, and version
httpRequestMessage.Method = httpRequest.Method;
httpRequestMessage.RequestUri = CreateRequestUri(uriScheme, httpRequest);
httpRequestMessage.Version = httpRequest.Version;
// Set the header fields and content if any
httpRequestMessage.Content = CreateHeaderFields(
httpRequest.HttpHeaders,
httpRequestMessage.Headers,
contentStream,
rewind
);
return(httpRequestMessage);
}
/// <summary>
/// Creates the request URI by combining scheme (provided) with parsed values of
/// host and path.
/// </summary>
/// <param name="uriScheme">The URI scheme to use for the request URI.</param>
/// <param name="httpRequest">The unsorted HTTP request.</param>
/// <returns>A fully qualified request URI.</returns>
private static Uri CreateRequestUri(string uriScheme, HttpUnsortedRequest httpRequest)
{
Contract.Assert(httpRequest != null, "httpRequest cannot be null.");
Contract.Assert(uriScheme != null, "uriScheme cannot be null");
IEnumerable <string> hostValues;
if (httpRequest.HttpHeaders.TryGetValues(FormattingUtilities.HttpHostHeader, out hostValues))
{
int hostCount = hostValues.Count();
if (hostCount != 1)
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserInvalidHostCount, FormattingUtilities.HttpHostHeader, hostCount);
}
}
else
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserInvalidHostCount, FormattingUtilities.HttpHostHeader, 0);
}
// We don't use UriBuilder as hostValues.ElementAt(0) contains 'host:port' and UriBuilder needs these split out into separate host and port.
string requestUri = String.Format(CultureInfo.InvariantCulture, "{0}://{1}{2}", uriScheme, hostValues.ElementAt(0), httpRequest.RequestUri);
return(new Uri(requestUri));
}
private static async Task <HttpRequestMessage> ReadAsHttpRequestMessageAsyncCore(this HttpContent content,
string uriScheme, int bufferSize, int maxHeaderSize, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
Stream stream = await content.ReadAsStreamAsync();
HttpUnsortedRequest httpRequest = new HttpUnsortedRequest();
HttpRequestHeaderParser parser = new HttpRequestHeaderParser(httpRequest,
HttpRequestHeaderParser.DefaultMaxRequestLineSize, maxHeaderSize);
ParserState parseStatus;
byte[] buffer = new byte[bufferSize];
int bytesRead = 0;
int headerConsumed = 0;
while (true)
{
try
{
bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length, cancellationToken);
}
catch (Exception e)
{
throw new IOException(Properties.Resources.HttpMessageErrorReading, e);
}
try
{
parseStatus = parser.ParseBuffer(buffer, bytesRead, ref headerConsumed);
}
catch (Exception)
{
parseStatus = ParserState.Invalid;
}
if (parseStatus == ParserState.Done)
{
return(CreateHttpRequestMessage(uriScheme, httpRequest, stream, bytesRead - headerConsumed));
}
else if (parseStatus != ParserState.NeedMoreData)
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserError, headerConsumed, buffer);
}
else if (bytesRead == 0)
{
throw new IOException(Properties.Resources.ReadAsHttpMessageUnexpectedTermination);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpRequestHeaderParser"/> class.
/// </summary>
/// <param name="httpRequest">The parsed HTTP request without any header sorting.</param>
/// <param name="maxRequestLineSize">The max length of the HTTP request line.</param>
/// <param name="maxHeaderSize">The max length of the HTTP header.</param>
public HttpRequestHeaderParser(HttpUnsortedRequest httpRequest, int maxRequestLineSize, int maxHeaderSize)
{
if (httpRequest == null)
{
throw Error.ArgumentNull("httpRequest");
}
this._httpRequest = httpRequest;
// Create request line parser
this._requestLineParser = new HttpRequestLineParser(this._httpRequest, maxRequestLineSize);
// Create header parser
this._headerParser = new InternetMessageFormatHeaderParser(this._httpRequest.HttpHeaders, maxHeaderSize);
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpRequestLineParser"/> class.
/// </summary>
/// <param name="httpRequest"><see cref="HttpUnsortedRequest"/> instance where the request line properties will be set as they are parsed.</param>
/// <param name="maxRequestLineSize">Maximum length of HTTP header.</param>
public HttpRequestLineParser(HttpUnsortedRequest httpRequest, int maxRequestLineSize)
{
// The minimum length which would be an empty header terminated by CRLF
if (maxRequestLineSize < MinRequestLineSize)
{
throw Error.ArgumentMustBeGreaterThanOrEqualTo("maxRequestLineSize", maxRequestLineSize, MinRequestLineSize);
}
if (httpRequest == null)
{
throw Error.ArgumentNull("httpRequest");
}
this._httpRequest = httpRequest;
this._maximumHeaderLength = maxRequestLineSize;
}
private static HttpRequestMessage CreateHttpRequestMessage(HttpUnsortedRequest httpRequest, Stream contentStream, int rewind)
{
Contract.Assert(httpRequest != null, "httpRequest must be non null");
Contract.Assert(contentStream != null, "contentStream must be non null");
HttpRequestMessage httpRequestMessage = new HttpRequestMessage();
// Set method, requestURI, and version
httpRequestMessage.Method = httpRequest.Method;
httpRequestMessage.RequestUri = CreateRequestUri(httpRequest);
httpRequestMessage.Version = httpRequest.Version;
// Set the header fields and content if any
httpRequestMessage.Content = CreateHeaderFields(httpRequest.HttpHeaders, httpRequestMessage.Headers, contentStream, rewind);
return httpRequestMessage;
}
public static async Task<HttpRequestMessage> ReadAsBatchHttpRequestMessageAsync(this HttpContent content)
{
Stream stream = await content.ReadAsStreamAsync();
HttpUnsortedRequest httpRequest = new HttpUnsortedRequest();
HttpRequestHeaderParser parser = new HttpRequestHeaderParser(httpRequest, HttpRequestHeaderParser.DefaultMaxRequestLineSize, HttpRequestHeaderParser.DefaultMaxHeaderSize);
ParserState parseStatus;
byte[] buffer = new byte[DefaultBufferSize];
int bytesRead = 0;
int headerConsumed = 0;
while (true)
{
try
{
bytesRead = stream.Read(buffer, 0, buffer.Length);
}
catch (Exception e)
{
throw new IOException(Properties.Resources.HttpMessageErrorReading, e);
}
try
{
parseStatus = parser.ParseBuffer(buffer, bytesRead, ref headerConsumed);
}
catch (Exception)
{
parseStatus = ParserState.Invalid;
}
if (parseStatus == ParserState.Done)
{
return CreateHttpRequestMessage(httpRequest, stream, bytesRead - headerConsumed);
}
else if (parseStatus != ParserState.NeedMoreData)
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserError, headerConsumed, buffer);
}
else if (bytesRead == 0)
{
throw new IOException(Properties.Resources.ReadAsHttpMessageUnexpectedTermination);
}
}
}
public static Task <HttpRequestMessage> ReadAsHttpRequestMessageAsync(this HttpContent content, string uriScheme, int bufferSize, int maxHeaderSize)
{
if (content == null)
{
throw Error.ArgumentNull("content");
}
if (uriScheme == null)
{
throw Error.ArgumentNull("uriScheme");
}
if (!Uri.CheckSchemeName(uriScheme))
{
throw Error.Argument("uriScheme", Properties.Resources.HttpMessageParserInvalidUriScheme, uriScheme, typeof(Uri).Name);
}
if (bufferSize < MinBufferSize)
{
throw Error.ArgumentMustBeGreaterThanOrEqualTo("bufferSize", bufferSize, MinBufferSize);
}
if (maxHeaderSize < InternetMessageFormatHeaderParser.MinHeaderSize)
{
throw Error.ArgumentMustBeGreaterThanOrEqualTo("maxHeaderSize", maxHeaderSize, InternetMessageFormatHeaderParser.MinHeaderSize);
}
HttpMessageContent.ValidateHttpMessageContent(content, true, true);
return(content.ReadAsStreamAsync().Then(stream =>
{
HttpUnsortedRequest httpRequest = new HttpUnsortedRequest();
HttpRequestHeaderParser parser = new HttpRequestHeaderParser(httpRequest, HttpRequestHeaderParser.DefaultMaxRequestLineSize, maxHeaderSize);
ParserState parseStatus;
byte[] buffer = new byte[bufferSize];
int bytesRead = 0;
int headerConsumed = 0;
while (true)
{
try
{
bytesRead = stream.Read(buffer, 0, buffer.Length);
}
catch (Exception e)
{
throw new IOException(Properties.Resources.HttpMessageErrorReading, e);
}
try
{
parseStatus = parser.ParseBuffer(buffer, bytesRead, ref headerConsumed);
}
catch (Exception)
{
parseStatus = ParserState.Invalid;
}
if (parseStatus == ParserState.Done)
{
return CreateHttpRequestMessage(uriScheme, httpRequest, stream, bytesRead - headerConsumed);
}
else if (parseStatus != ParserState.NeedMoreData)
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserError, headerConsumed, buffer);
}
}
}));
}
/// <summary>
/// Creates the request URI by combining scheme (provided) with parsed values of
/// host and path.
/// </summary>
/// <param name="uriScheme">The URI scheme to use for the request URI.</param>
/// <param name="httpRequest">The unsorted HTTP request.</param>
/// <returns>A fully qualified request URI.</returns>
private static Uri CreateRequestUri(string uriScheme, HttpUnsortedRequest httpRequest)
{
Contract.Assert(httpRequest != null, "httpRequest cannot be null.");
Contract.Assert(uriScheme != null, "uriScheme cannot be null");
IEnumerable<string> hostValues;
if (httpRequest.HttpHeaders.TryGetValues(FormattingUtilities.HttpHostHeader, out hostValues))
{
int hostCount = hostValues.Count();
if (hostCount != 1)
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserInvalidHostCount, FormattingUtilities.HttpHostHeader, hostCount);
}
}
else
{
throw Error.InvalidOperation(Properties.Resources.HttpMessageParserInvalidHostCount, FormattingUtilities.HttpHostHeader, 0);
}
// We don't use UriBuilder as hostValues.ElementAt(0) contains 'host:port' and UriBuilder needs these split out into separate host and port.
string requestUri = String.Format(CultureInfo.InvariantCulture, "{0}://{1}{2}", uriScheme, hostValues.ElementAt(0), httpRequest.RequestUri);
return new Uri(requestUri);
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpRequestHeaderParser"/> class.
/// </summary>
/// <param name="httpRequest">The parsed HTTP request without any header sorting.</param>
public HttpRequestHeaderParser(HttpUnsortedRequest httpRequest)
: this(httpRequest, DefaultMaxRequestLineSize, DefaultMaxHeaderSize)
{
}
public void Constructor_InitializesHeaders()
{
HttpUnsortedRequest request = new HttpUnsortedRequest();
Assert.IsType<HttpUnsortedHeaders>(request.HttpHeaders);
}
public void Constructor_InitializesHeaders()
{
HttpUnsortedRequest request = new HttpUnsortedRequest();
Assert.IsType <HttpUnsortedHeaders>(request.HttpHeaders);
}
public static Task<HttpRequestMessage> ReadAsHttpRequestMessageAsync(this HttpContent content, string uriScheme, int bufferSize)
{
if (content == null)
{
throw new ArgumentNullException("content");
}
if (uriScheme == null)
{
throw new ArgumentNullException("uriScheme");
}
if (!Uri.CheckSchemeName(uriScheme))
{
throw new ArgumentException(RS.Format(Properties.Resources.HttpMessageParserInvalidUriScheme, uriScheme, typeof(Uri).Name), "uriScheme");
}
if (bufferSize < MinBufferSize)
{
throw new ArgumentOutOfRangeException("bufferSize", bufferSize, RS.Format(Properties.Resources.ArgumentMustBeGreaterThanOrEqualTo, MinBufferSize));
}
HttpMessageContent.ValidateHttpMessageContent(content, true, true);
return content.ReadAsStreamAsync().Then(stream =>
{
HttpUnsortedRequest httpRequest = new HttpUnsortedRequest();
HttpRequestHeaderParser parser = new HttpRequestHeaderParser(httpRequest);
ParserState parseStatus;
byte[] buffer = new byte[bufferSize];
int bytesRead = 0;
int headerConsumed = 0;
while (true)
{
try
{
bytesRead = stream.Read(buffer, 0, buffer.Length);
}
catch (Exception e)
{
throw new IOException(Properties.Resources.HttpMessageErrorReading, e);
}
try
{
parseStatus = parser.ParseBuffer(buffer, bytesRead, ref headerConsumed);
}
catch (Exception)
{
parseStatus = ParserState.Invalid;
}
if (parseStatus == ParserState.Done)
{
return CreateHttpRequestMessage(uriScheme, httpRequest, stream, bytesRead - headerConsumed);
}
else if (parseStatus != ParserState.NeedMoreData)
{
throw new IOException(RS.Format(Properties.Resources.HttpMessageParserError, headerConsumed, buffer));
}
}
});
}
private static Uri CreateRequestUri(HttpUnsortedRequest httpRequest)
{
Contract.Assert(httpRequest != null, "httpRequest cannot be null.");
// We don't use UriBuilder as hostValues.ElementAt(0) contains 'host:port' and UriBuilder needs these split out into separate host and port.
string requestUri = String.Format(CultureInfo.InvariantCulture, "http://localhost{0}", httpRequest.RequestUri);
return new Uri(requestUri);
}
private static ParserState ParseRequestLine(
byte[] buffer,
int bytesReady,
ref int bytesConsumed,
ref HttpRequestLineState requestLineState,
int maximumHeaderLength,
ref int totalBytesConsumed,
StringBuilder currentToken,
HttpUnsortedRequest httpRequest)
{
Contract.Assert((bytesReady - bytesConsumed) >= 0, "ParseRequestLine()|(bytesReady - bytesConsumed) < 0");
Contract.Assert(maximumHeaderLength <= 0 || totalBytesConsumed <= maximumHeaderLength, "ParseRequestLine()|Headers already read exceeds limit.");
// Remember where we started.
int initialBytesParsed = bytesConsumed;
int segmentStart;
// Set up parsing status with what will happen if we exceed the buffer.
ParserState parseStatus = ParserState.DataTooBig;
int effectiveMax = maximumHeaderLength <= 0 ? Int32.MaxValue : (maximumHeaderLength - totalBytesConsumed + bytesConsumed);
if (bytesReady < effectiveMax)
{
parseStatus = ParserState.NeedMoreData;
effectiveMax = bytesReady;
}
Contract.Assert(bytesConsumed < effectiveMax, "We have already consumed more than the max header length.");
switch (requestLineState)
{
case HttpRequestLineState.RequestMethod:
segmentStart = bytesConsumed;
while (buffer[bytesConsumed] != ' ')
{
if (buffer[bytesConsumed] < 0x21 || buffer[bytesConsumed] > 0x7a)
{
parseStatus = ParserState.Invalid;
goto quit;
}
if (++bytesConsumed == effectiveMax)
{
string method = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(method);
goto quit;
}
}
if (bytesConsumed > segmentStart)
{
string method = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(method);
}
// Copy value out
httpRequest.Method = new HttpMethod(currentToken.ToString());
currentToken.Clear();
// Move past the SP
requestLineState = HttpRequestLineState.RequestUri;
if (++bytesConsumed == effectiveMax)
{
goto quit;
}
goto case HttpRequestLineState.RequestUri;
case HttpRequestLineState.RequestUri:
segmentStart = bytesConsumed;
while (buffer[bytesConsumed] != ' ')
{
if (buffer[bytesConsumed] == '\r')
{
parseStatus = ParserState.Invalid;
goto quit;
}
if (++bytesConsumed == effectiveMax)
{
string addr = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(addr);
goto quit;
}
}
if (bytesConsumed > segmentStart)
{
string addr = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(addr);
}
// URI validation happens when we create the URI later.
if (currentToken.Length == 0)
{
throw new FormatException(Resources.HttpMessageParserEmptyUri);
}
// Copy value out
httpRequest.RequestUri = currentToken.ToString();
currentToken.Clear();
// Move past the SP
requestLineState = HttpRequestLineState.BeforeVersionNumbers;
if (++bytesConsumed == effectiveMax)
{
goto quit;
}
goto case HttpRequestLineState.BeforeVersionNumbers;
case HttpRequestLineState.BeforeVersionNumbers:
segmentStart = bytesConsumed;
while (buffer[bytesConsumed] != '/')
{
if (buffer[bytesConsumed] < 0x21 || buffer[bytesConsumed] > 0x7a)
{
parseStatus = ParserState.Invalid;
goto quit;
}
if (++bytesConsumed == effectiveMax)
{
string token = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(token);
goto quit;
}
}
if (bytesConsumed > segmentStart)
{
string token = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(token);
}
// Validate value
string version = currentToken.ToString();
if (String.CompareOrdinal(FormattingUtilities.HttpVersionToken, version) != 0)
{
throw new FormatException(Error.Format(Resources.HttpInvalidVersion, version, FormattingUtilities.HttpVersionToken));
}
currentToken.Clear();
// Move past the '/'
requestLineState = HttpRequestLineState.MajorVersionNumber;
if (++bytesConsumed == effectiveMax)
{
goto quit;
}
goto case HttpRequestLineState.MajorVersionNumber;
case HttpRequestLineState.MajorVersionNumber:
segmentStart = bytesConsumed;
while (buffer[bytesConsumed] != '.')
{
if (buffer[bytesConsumed] < '0' || buffer[bytesConsumed] > '9')
{
parseStatus = ParserState.Invalid;
goto quit;
}
if (++bytesConsumed == effectiveMax)
{
string major = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(major);
goto quit;
}
}
if (bytesConsumed > segmentStart)
{
string major = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(major);
}
// Move past the "."
currentToken.Append('.');
requestLineState = HttpRequestLineState.MinorVersionNumber;
if (++bytesConsumed == effectiveMax)
{
goto quit;
}
goto case HttpRequestLineState.MinorVersionNumber;
case HttpRequestLineState.MinorVersionNumber:
segmentStart = bytesConsumed;
while (buffer[bytesConsumed] != '\r')
{
if (buffer[bytesConsumed] < '0' || buffer[bytesConsumed] > '9')
{
parseStatus = ParserState.Invalid;
goto quit;
}
if (++bytesConsumed == effectiveMax)
{
string minor = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(minor);
goto quit;
}
}
if (bytesConsumed > segmentStart)
{
string minor = Encoding.UTF8.GetString(buffer, segmentStart, bytesConsumed - segmentStart);
currentToken.Append(minor);
}
// Copy out value
httpRequest.Version = Version.Parse(currentToken.ToString());
currentToken.Clear();
// Move past the CR
requestLineState = HttpRequestLineState.AfterCarriageReturn;
if (++bytesConsumed == effectiveMax)
{
goto quit;
}
goto case HttpRequestLineState.AfterCarriageReturn;
case HttpRequestLineState.AfterCarriageReturn:
if (buffer[bytesConsumed] != '\n')
{
parseStatus = ParserState.Invalid;
goto quit;
}
parseStatus = ParserState.Done;
bytesConsumed++;
break;
}
quit:
totalBytesConsumed += bytesConsumed - initialBytesParsed;
return parseStatus;
}
