private static void ReadHeaderLines(AbstractHttpStream s, IDictionary <string, string> headers)
{
headers.Clear();
string lastHeader = string.Empty;
string hdrline;
while ((hdrline = s.ReadHeaderLine()).Length != 0)
{
if (hdrline.StartsWith(" "))
{
if (lastHeader.Length != 0)
{
headers[lastHeader] += hdrline.Trim();
}
}
else
{
string[] splits = hdrline.Split(new char[] { ':' }, 2);
if (splits.Length < 2)
{
throw new BadHttpResponseException();
}
lastHeader = splits[0].Trim().ToLowerInvariant();
if (headers.ContainsKey(lastHeader))
{
headers[lastHeader] += "\0" + splits[1].Trim();
}
else
{
headers[lastHeader] = splits[1].Trim();
}
}
}
}
public static Stream ExecuteStreamRequest(
this Request request)
{
byte[] postdata = request.RequestBody;
if (postdata != null)
{
request.RequestContentLength = 0;
if (request.IsCompressed || request.RequestContentType == "application/x-gzip")
{
using (var ms = new MemoryStream())
{
using (var comp = new GZipStream(ms, CompressionMode.Compress))
{
comp.Write(postdata, 0, postdata.Length);
/* The GZIP stream has a CRC-32 and a EOF marker, so we close it first to have it completed */
}
postdata = ms.ToArray();
}
}
request.RequestBodyDelegate = (Stream poststream) => poststream.Write(postdata, 0, postdata.Length);
/* append request POST data */
request.RequestContentLength = postdata.Length;
}
string url = request.Url;
if (request.GetValues != null)
{
url += "?" + BuildQueryString(request.GetValues);
}
var uri = new Uri(url);
if (request.ConnectionMode == ConnectionModeEnum.Http2PriorKnowledge)
{
return(DoStreamRequestHttp2(request, uri));
}
if (request.ConnectionMode == ConnectionModeEnum.UpgradeHttp2)
{
Http2Connection.Http2Stream h2stream = TryReuseStream(uri.Scheme, uri.Host, uri.Port);
if (h2stream != null)
{
return(DoStreamRequestHttp2(request, uri, h2stream));
}
}
byte[] outdata;
string method = request.Method;
redoafter401:
var reqdata = new StringBuilder(uri.IsDefaultPort ?
$"{method} {uri.PathAndQuery} HTTP/1.1\r\nHost: {uri.Host}\r\n" :
$"{method} {uri.PathAndQuery} HTTP/1.1\r\nHost: {uri.Host}:{uri.Port}\r\n");
bool doPost = false;
bool doChunked = false;
bool compressed = request.IsCompressed;
int content_length = request.RequestContentLength;
IDictionary <string, string> headers = request.Headers;
bool haveAccept = false;
if (headers != null)
{
var removal = new List <string>();
foreach (string k in headers.Keys)
{
if (string.Compare(k, "content-length", true) == 0 ||
string.Compare(k, "content-type", true) == 0 ||
string.Compare(k, "connection", true) == 0 ||
string.Compare(k, "expect", true) == 0 ||
string.Compare(k, "transfer-encoding", true) == 0)
{
removal.Add(k);
}
if (string.Compare(k, "accept", true) == 0)
{
haveAccept = true;
}
}
if (removal.Count != 0)
{
foreach (string k in removal)
{
headers.Remove(k);
}
}
}
if (request.Authorization != null)
{
if (headers == null)
{
headers = new Dictionary <string, string>();
}
if (request.Authorization.IsSchemeAllowed(uri.Scheme))
{
request.Authorization.GetRequestHeaders(headers, request.Method, uri.PathAndQuery);
}
}
if (headers != null)
{
foreach (KeyValuePair <string, string> kvp in headers)
{
reqdata.Append($"{kvp.Key}: {kvp.Value}\r\n");
}
}
if (request.UseChunkedEncoding)
{
reqdata.Append("Transfer-Encoding: chunked\r\n");
}
string content_type = request.RequestContentType;
bool expect100Continue = request.Expect100Continue;
if (request.RequestBodyDelegate != null)
{
if (content_type != null)
{
reqdata.Append($"Content-Type: {content_type}\r\n");
}
if (request.UseChunkedEncoding)
{
doPost = true;
doChunked = true;
reqdata.Append("Transfer-Encoding: chunked\r\n");
if (compressed && content_type != "application/x-gzip")
{
reqdata.Append("X-Content-Encoding: gzip\r\n");
}
if (expect100Continue)
{
reqdata.Append("Expect: 100-continue\r\n");
}
}
else
{
doPost = true;
if (content_length > request.Expect100ContinueMinSize)
{
expect100Continue = true;
request.Expect100Continue = true;
}
reqdata.Append($"Content-Length: {content_length}\r\n");
if (compressed && content_type != "application/x-gzip")
{
reqdata.Append("X-Content-Encoding: gzip\r\n");
}
if (expect100Continue)
{
reqdata.Append("Expect: 100-continue\r\n");
}
}
}
if (method != "HEAD")
{
reqdata.Append("Accept-Encoding: gzip, deflate\r\n");
}
if (!haveAccept)
{
reqdata.Append("Accept: */*\r\n");
}
int retrycnt = 1;
retry:
AbstractHttpStream s = OpenStream(uri.Scheme, uri.Host, uri.Port, request.ClientCertificates, request.EnabledSslProtocols, request.CheckCertificateRevocation, request.ConnectionMode, request.RemoteCertificateValidationCallback, request.EnableIPv6 && OSSupportsIPv6);
string finalreqdata = reqdata.ToString();
if (!s.IsReusable)
{
finalreqdata += "Connection: close\r\n";
}
bool h2cUpgrade = request.ConnectionMode == ConnectionModeEnum.UpgradeHttp2;
if (h2cUpgrade)
{
finalreqdata += "Upgrade: h2c\r\nHTTP2-Settings:\r\n";
}
finalreqdata += "\r\n";
outdata = Encoding.ASCII.GetBytes(finalreqdata);
try
{
s.Write(outdata, 0, outdata.Length);
s.Flush();
}
catch (ObjectDisposedException)
{
if (retrycnt-- > 0)
{
goto retry;
}
throw;
}
catch (SocketException)
{
if (retrycnt-- > 0)
{
goto retry;
}
throw;
}
catch (IOException)
{
if (retrycnt-- > 0)
{
goto retry;
}
throw;
}
s.ReadTimeout = 10000;
string resline;
string[] splits;
if (doPost)
{
if (expect100Continue)
{
try
{
resline = s.ReadHeaderLine();
splits = resline.Split(new char[] { ' ' }, 3);
if (splits.Length < 3)
{
throw new BadHttpResponseException("Not a HTTP response");
}
if (!splits[0].StartsWith("HTTP/"))
{
throw new BadHttpResponseException("Missing HTTP version info");
}
if (splits[1] == "101")
{
ReadHeaderLines(s, headers);
headers.Clear();
var conn = new Http2Connection(s, false);
Http2Connection.Http2Stream h2stream = conn.UpgradeClientStream();
AddH2Connection(conn, uri.Scheme, uri.Host, uri.Port);
return(DoStreamRequestHttp2Response(h2stream, request, uri, doPost));
}
if (splits[1] != "100")
{
int statusCode;
headers.Clear();
ReadHeaderLines(s, headers);
if (!int.TryParse(splits[1], out statusCode))
{
statusCode = 500;
}
request.StatusCode = (HttpStatusCode)statusCode;
if (statusCode == 401 && request.Authorization != null && request.Authorization.CanHandleUnauthorized(headers))
{
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
goto redoafter401;
}
if (statusCode == 401)
{
string data;
if (headers.TryGetValue("www-authenticate", out data))
{
string authtype;
Dictionary <string, string> authpara = ParseWWWAuthenticate(data, out authtype);
if (authpara == null)
{
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
throw new BadHttpResponseException("Invalid WWW-Authenticate");
}
else if (request.IsExceptionDisabled())
{
return(GetResponseBodyStream(headers, uri, splits, method, s));
}
else
{
string realm;
if (!authpara.TryGetValue("realm", out realm))
{
realm = string.Empty;
}
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
throw new HttpUnauthorizedException(authtype, realm, authpara);
}
}
}
if (request.IsExceptionDisabled())
{
return(GetResponseBodyStream(headers, uri, splits, method, s));
}
else
{
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
throw new HttpException(statusCode, statusCode == 404 ? splits[2] + " (" + url + ")" : splits[2]);
}
}
while (s.ReadHeaderLine().Length != 0)
{
/* ReadHeaderLine() is all we have to do */
}
}
catch (HttpStream.TimeoutException)
{
/* keep caller from being exceptioned */
}
catch (IOException)
{
/* keep caller from being exceptioned */
}
catch (SocketException)
{
/* keep caller from being exceptioned */
}
}
if (doChunked)
{
/* append request POST data */
using (var reqbody = new HttpWriteChunkedBodyStream(s))
{
request.RequestBodyDelegate(reqbody);
}
}
else
{
/* append request POST data */
using (var reqbody = new RequestBodyStream(s, content_length))
{
request.RequestBodyDelegate(reqbody);
}
}
s.Flush();
}
s.ReadTimeout = request.TimeoutMs;
resline = s.ReadHeaderLine();
splits = resline.Split(new char[] { ' ' }, 3);
if (splits.Length < 3)
{
throw new BadHttpResponseException("Not a HTTP response");
}
if (!splits[0].StartsWith("HTTP/"))
{
throw new BadHttpResponseException("Missing HTTP version info");
}
if (headers == null)
{
headers = new Dictionary <string, string>();
}
else
{
headers.Clear();
}
if (splits[1] == "101")
{
ReadHeaderLines(s, headers);
headers.Clear();
var conn = new Http2Connection(s, false);
Http2Connection.Http2Stream h2stream = conn.UpgradeClientStream();
AddH2Connection(conn, uri.Scheme, uri.Host, uri.Port);
return(DoStreamRequestHttp2Response(h2stream, request, uri, doPost));
}
if (!splits[1].StartsWith("2"))
{
ReadHeaderLines(s, headers);
int statusCode;
if (!int.TryParse(splits[1], out statusCode))
{
statusCode = 500;
}
request.StatusCode = (HttpStatusCode)statusCode;
if (statusCode == 401 && request.Authorization != null && request.Authorization.CanHandleUnauthorized(headers))
{
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
goto redoafter401;
}
if (statusCode == 401)
{
string data;
if (headers.TryGetValue("www-authenticate", out data))
{
string authtype;
Dictionary <string, string> authpara = ParseWWWAuthenticate(data, out authtype);
if (authpara == null)
{
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
throw new BadHttpResponseException("Invalid WWW-Authenticate");
}
else if (request.IsExceptionDisabled())
{
return(GetResponseBodyStream(headers, uri, splits, method, s));
}
else
{
string realm;
if (!authpara.TryGetValue("realm", out realm))
{
realm = string.Empty;
}
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
throw new HttpUnauthorizedException(authtype, realm, authpara);
}
}
}
else
{
request.Authorization?.ProcessResponseHeaders(headers);
}
if (request.IsExceptionDisabled())
{
return(GetResponseBodyStream(headers, uri, splits, method, s));
}
else
{
using (GetResponseBodyStream(headers, uri, splits, method, s))
{
/* just consume it */
}
throw new HttpException(statusCode, statusCode == 404 ? splits[2] + " (" + url + ")" : splits[2]);
}
}
else
{
request.StatusCode = (HttpStatusCode)int.Parse(splits[1]);
}
/* needs a little passthrough for not changing the API, this actually comes from HTTP/2 */
headers.Add(":status", splits[1]);
ReadHeaderLines(s, headers);
request.Authorization?.ProcessResponseHeaders(headers);
return(GetResponseBodyStream(headers, uri, splits, method, s));
}