public void Trim_VariousInputs_ReturnsExpectedSubstring(string valueString, string expected)
{
char[] value = valueString.ToCharArray();
int startIndex = 0;
int length = value.Length;
CharArrayHelpers.Trim(value, ref startIndex, ref length);
Assert.Equal(expected, new string(value, startIndex, length));
}
/// <summary>
/// Reads a header line.
/// Empty header lines are skipped, as are malformed header lines that are missing a colon character.
/// </summary>
/// <returns>true if the next header was read successfully, or false if all characters have been read.</returns>
public bool ReadHeader([NotNullWhen(true)] out string?name, [NotNullWhen(true)] out string?value)
{
int startIndex;
int length;
while (ReadLine(out startIndex, out length))
{
// Skip empty lines.
if (length == 0)
{
continue;
}
int colonIndex = Array.IndexOf(_buffer, ':', startIndex, length);
// Skip malformed header lines that are missing the colon character.
if (colonIndex == -1)
{
continue;
}
int nameLength = colonIndex - startIndex;
// If it's a known header name, use the known name instead of allocating a new string.
if (!HttpKnownHeaderNames.TryGetHeaderName(_buffer, startIndex, nameLength, out name))
{
name = new string(_buffer, startIndex, nameLength);
}
// Normalize header value by trimming whitespace.
int valueStartIndex = colonIndex + 1;
int valueLength = startIndex + length - colonIndex - 1;
CharArrayHelpers.Trim(_buffer, ref valueStartIndex, ref valueLength);
value = HttpKnownHeaderNames.GetHeaderValue(name, _buffer, valueStartIndex, valueLength);
return(true);
}
name = null;
value = null;
return(false);
}
public static HttpResponseMessage CreateResponseMessage(
WinHttpRequestState state,
bool doManualDecompressionCheck)
{
HttpRequestMessage request = state.RequestMessage;
SafeWinHttpHandle requestHandle = state.RequestHandle;
CookieUsePolicy cookieUsePolicy = state.Handler.CookieUsePolicy;
CookieContainer cookieContainer = state.Handler.CookieContainer;
var response = new HttpResponseMessage();
bool stripEncodingHeaders = false;
// Create a single buffer to use for all subsequent WinHttpQueryHeaders string interop calls.
// This buffer is the length needed for WINHTTP_QUERY_RAW_HEADERS_CRLF, which includes the status line
// and all headers separated by CRLF, so it should be large enough for any individual status line or header queries.
int bufferLength = GetResponseHeaderCharBufferLength(requestHandle, Interop.WinHttp.WINHTTP_QUERY_RAW_HEADERS_CRLF);
char[] buffer = ArrayPool <char> .Shared.Rent(bufferLength);
try
{
// Get HTTP version, status code, reason phrase from the response headers.
if (IsResponseHttp2(requestHandle))
{
response.Version = WinHttpHandler.HttpVersion20;
}
else
{
int versionLength = GetResponseHeader(requestHandle, Interop.WinHttp.WINHTTP_QUERY_VERSION, buffer);
response.Version =
CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase("HTTP/1.1", buffer, 0, versionLength) ? HttpVersionInternal.Version11 :
CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase("HTTP/1.0", buffer, 0, versionLength) ? HttpVersionInternal.Version10 :
WinHttpHandler.HttpVersionUnknown;
}
response.StatusCode = (HttpStatusCode)GetResponseHeaderNumberInfo(
requestHandle,
Interop.WinHttp.WINHTTP_QUERY_STATUS_CODE);
int reasonPhraseLength = GetResponseHeader(requestHandle, Interop.WinHttp.WINHTTP_QUERY_STATUS_TEXT, buffer);
response.ReasonPhrase = reasonPhraseLength > 0 ?
GetReasonPhrase(response.StatusCode, buffer, reasonPhraseLength) :
string.Empty;
// Create response stream and wrap it in a StreamContent object.
var responseStream = new WinHttpResponseStream(requestHandle, state);
state.RequestHandle = null; // ownership successfully transfered to WinHttpResponseStram.
Stream decompressedStream = responseStream;
if (doManualDecompressionCheck)
{
int contentEncodingStartIndex = 0;
int contentEncodingLength = GetResponseHeader(
requestHandle,
Interop.WinHttp.WINHTTP_QUERY_CONTENT_ENCODING,
buffer);
CharArrayHelpers.Trim(buffer, ref contentEncodingStartIndex, ref contentEncodingLength);
if (contentEncodingLength > 0)
{
if (CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase(
EncodingNameGzip, buffer, contentEncodingStartIndex, contentEncodingLength))
{
decompressedStream = new GZipStream(responseStream, CompressionMode.Decompress);
stripEncodingHeaders = true;
}
else if (CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase(
EncodingNameDeflate, buffer, contentEncodingStartIndex, contentEncodingLength))
{
decompressedStream = new DeflateStream(responseStream, CompressionMode.Decompress);
stripEncodingHeaders = true;
}
}
}
response.Content = new NoWriteNoSeekStreamContent(decompressedStream);
response.RequestMessage = request;
// Parse raw response headers and place them into response message.
ParseResponseHeaders(requestHandle, response, buffer, stripEncodingHeaders);
if (response.RequestMessage.Method != HttpMethod.Head)
{
state.ExpectedBytesToRead = response.Content.Headers.ContentLength;
}
return(response);
}
finally
{
ArrayPool <char> .Shared.Return(buffer);
}
}
public static HttpResponseMessage CreateResponseMessage(
WinHttpRequestState state,
bool doManualDecompressionCheck)
{
HttpRequestMessage request = state.RequestMessage;
SafeWinHttpHandle requestHandle = state.RequestHandle;
CookieUsePolicy cookieUsePolicy = state.Handler.CookieUsePolicy;
CookieContainer cookieContainer = state.Handler.CookieContainer;
var response = new HttpResponseMessage();
bool stripEncodingHeaders = false;
// Create a single buffer to use for all subsequent WinHttpQueryHeaders string interop calls.
// This buffer is the length needed for WINHTTP_QUERY_RAW_HEADERS_CRLF, which includes the status line
// and all headers separated by CRLF, so it should be large enough for any individual status line or header queries.
int bufferLength = GetResponseHeaderCharBufferLength(requestHandle, Interop.WinHttp.WINHTTP_QUERY_RAW_HEADERS_CRLF);
char[] buffer = new char[bufferLength];
// Get HTTP version, status code, reason phrase from the response headers.
int versionLength = GetResponseHeader(requestHandle, Interop.WinHttp.WINHTTP_QUERY_VERSION, buffer);
response.Version =
CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase("HTTP/1.1", buffer, 0, versionLength) ? HttpVersion.Version11 :
CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase("HTTP/1.0", buffer, 0, versionLength) ? HttpVersion.Version10 :
HttpVersion.Unknown;
response.StatusCode = (HttpStatusCode)GetResponseHeaderNumberInfo(
requestHandle,
Interop.WinHttp.WINHTTP_QUERY_STATUS_CODE);
int reasonPhraseLength = GetResponseHeader(requestHandle, Interop.WinHttp.WINHTTP_QUERY_STATUS_TEXT, buffer);
response.ReasonPhrase = reasonPhraseLength > 0 ?
GetReasonPhrase(response.StatusCode, buffer, reasonPhraseLength) :
string.Empty;
// Create response stream and wrap it in a StreamContent object.
var responseStream = new WinHttpResponseStream(requestHandle, state);
state.RequestHandle = null; // ownership successfully transfered to WinHttpResponseStram.
Stream decompressedStream = responseStream;
if (doManualDecompressionCheck)
{
int contentEncodingStartIndex = 0;
int contentEncodingLength = GetResponseHeader(
requestHandle,
Interop.WinHttp.WINHTTP_QUERY_CONTENT_ENCODING,
buffer);
CharArrayHelpers.Trim(buffer, ref contentEncodingStartIndex, ref contentEncodingLength);
if (contentEncodingLength > 0)
{
if (CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase(
EncodingNameGzip, buffer, contentEncodingStartIndex, contentEncodingLength))
{
decompressedStream = new GZipStream(responseStream, CompressionMode.Decompress);
stripEncodingHeaders = true;
}
else if (CharArrayHelpers.EqualsOrdinalAsciiIgnoreCase(
EncodingNameDeflate, buffer, contentEncodingStartIndex, contentEncodingLength))
{
decompressedStream = new DeflateStream(responseStream, CompressionMode.Decompress);
stripEncodingHeaders = true;
}
}
}
#if HTTP_DLL
var content = new StreamContent(decompressedStream, state.CancellationToken);
#else
// TODO: Issue https://github.com/dotnet/corefx/issues/9071
// We'd like to be able to pass state.CancellationToken into the StreamContent so that its
// SerializeToStreamAsync method can use it, but that ctor isn't public, nor is there a
// SerializeToStreamAsync override that takes a CancellationToken.
var content = new StreamContent(decompressedStream);
#endif
response.Content = content;
response.RequestMessage = request;
// Parse raw response headers and place them into response message.
ParseResponseHeaders(requestHandle, response, buffer, stripEncodingHeaders);
if (response.RequestMessage.Method != HttpMethod.Head)
{
state.ExpectedBytesToRead = response.Content.Headers.ContentLength;
}
return(response);
}
