public static CFHTTPAuthentication CreateFromResponse (CFHTTPMessage response)
{
if (response.IsRequest)
throw new InvalidOperationException ();
var handle = CFHTTPAuthenticationCreateFromResponse (IntPtr.Zero, response.Handle);
if (handle == IntPtr.Zero)
return null;
return new CFHTTPAuthentication (handle);
}
public static CFHTTPAuthentication CreateFromResponse(CFHTTPMessage response)
{
if (response.IsRequest)
{
throw new InvalidOperationException();
}
var handle = CFHTTPAuthenticationCreateFromResponse(IntPtr.Zero, response.Handle);
if (handle == IntPtr.Zero)
{
return(null);
}
return(new CFHTTPAuthentication(handle));
}
public CFHTTPMessage GetResponseHeader()
{
var handle = GetProperty(_ResponseHeader);
if (handle == IntPtr.Zero)
{
return(null);
}
if (CFType.GetTypeID(handle) != CFHTTPMessage.GetTypeID())
{
CFObject.CFRelease(handle);
throw new InvalidCastException();
}
return(new CFHTTPMessage(handle));
}
public static CFHTTPStream CreateForStreamedHTTPRequest(CFHTTPMessage request, CFReadStream body)
{
var handle = CFReadStreamCreateForStreamedHTTPRequest (IntPtr.Zero, request.Handle, body.Handle);
if (handle == IntPtr.Zero)
return null;
return new CFHTTPStream (handle);
}
void DecodeHeaders (CFHTTPMessage message, HttpResponseMessage response, Content content)
{
using (var dict = message.GetAllHeaderFields ()) {
foreach (var entry in dict) {
DecodeHeader (response, content, entry);
}
}
}
void FindAuthenticationObject (CFHTTPMessage response)
{
if (auth != null) {
if (auth.IsValid)
return;
auth.Dispose ();
auth = null;
}
if (auth == null) {
auth = CFHTTPAuthentication.CreateFromResponse (response);
if (auth == null)
throw new HttpRequestException ("Failed to create CFHTTPAuthentication");
}
if (!auth.IsValid)
throw new HttpRequestException ("Failed to validate CFHTTPAuthentication");
}
bool HandleAuthentication (CFHTTPMessage request, CFHTTPMessage response,
CFHTTPMessage.AuthenticationScheme scheme,
NetworkCredential credential)
{
bool forProxy = response.ResponseStatusCode == HttpStatusCode.ProxyAuthenticationRequired;
return request.AddAuthentication (
response, (NSString)credential.UserName, (NSString)credential.Password,
scheme, forProxy);
}
bool HandlePreAuthentication (Uri uri, CFHTTPMessage message)
{
var method = auth.GetMethod ();
var credential = Credentials.GetCredential (uri, method);
if (credential == null)
return false;
message.ApplyCredentials (auth, credential);
return true;
}
bool HandleAuthentication (Uri uri, CFHTTPMessage request, CFHTTPMessage response)
{
if (Credentials == null)
return false;
if (PreAuthenticate) {
FindAuthenticationObject (response);
return HandlePreAuthentication (uri, request);
}
var basic = Credentials.GetCredential (uri, "Basic");
var digest = Credentials.GetCredential (uri, "Digest");
bool ok = false;
if ((basic != null) && (digest == null))
ok = HandleAuthentication (
request, response, CFHTTPMessage.AuthenticationScheme.Basic, basic);
if ((digest != null) && (basic == null))
ok = HandleAuthentication (
request, response, CFHTTPMessage.AuthenticationScheme.Digest, digest);
if (ok)
return true;
FindAuthenticationObject (response);
return HandlePreAuthentication (uri, request);
}
string GetReasonPhrase (CFHTTPMessage response)
{
var line = response.ResponseStatusLine;
var match = Regex.Match (line, "HTTP/1.(0|1) (\\d+) (.*)");
if (!match.Success)
return line;
return match.Groups [3].Value;
}
async Task<HttpResponseMessage> ProcessRequest (HttpRequestMessage request,
CFHTTPMessage message,
WebRequestStream body,
bool retryWithCredentials,
CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested ();
WebResponseStream stream;
if (body != null)
stream = WebResponseStream.Create (message, body);
else
stream = WebResponseStream.Create (message);
if (stream == null)
throw new HttpRequestException (string.Format (
"Failed to create web request for '{0}'.",
request.RequestUri)
);
stream.Stream.ShouldAutoredirect = AllowAutoRedirect;
stream.Stream.AttemptPersistentConnection = GetKeepAlive (request);
var response = await stream.Open (
WorkerThread, cancellationToken).ConfigureAwait (false);
var status = (HttpStatusCode)response.ResponseStatusCode;
if (retryWithCredentials && (body == null) &&
(status == HttpStatusCode.Unauthorized) ||
(status == HttpStatusCode.ProxyAuthenticationRequired)) {
if (HandleAuthentication (request.RequestUri, message, response)) {
stream.Dispose ();
return await ProcessRequest (
request, message, null, false, cancellationToken);
}
}
// The Content object takes ownership of the stream, so we don't
// dispose it here.
var retval = new HttpResponseMessage ();
retval.StatusCode = response.ResponseStatusCode;
retval.ReasonPhrase = GetReasonPhrase (response);
retval.Version = response.Version;
var content = new Content (stream);
retval.Content = content;
DecodeHeaders (response, retval, content);
return retval;
}
async Task<WebRequestStream> CreateBody (HttpRequestMessage request, CFHTTPMessage message,
CancellationToken cancellationToken)
{
if (request.Content == null)
return null;
/*
* There are two ways of sending the body:
*
* - CFHTTPMessageSetBody() sets the full body contents
* We use this by default.
*
* - CFReadStreamCreateForStreamedHTTPRequest() should be used
* if the body is too large to fit in memory. It also uses
* chunked transfer encoding.
*
* We use this if the user either gave us a StreamContent, or we
* don't have any Content-Length, so we'll have to use chunked
* transfer anyways.
*
*/
var length = request.Content.Headers.ContentLength;
if ((request.Content is StreamContent) || (length == null)) {
var stream = await request.Content.ReadAsStreamAsync ().ConfigureAwait (false);
return new WebRequestStream (stream, cancellationToken);
}
var text = await request.Content.ReadAsByteArrayAsync ().ConfigureAwait (false);
message.SetBody (text);
return null;
}
void SetupRequest (HttpRequestMessage request, CFHTTPMessage message)
{
string accept_encoding = null;
if ((AutomaticDecompression & DecompressionMethods.GZip) != 0)
accept_encoding = "gzip";
if ((AutomaticDecompression & DecompressionMethods.Deflate) != 0)
accept_encoding = accept_encoding != null ? "gzip, deflate" : "deflate";
if (accept_encoding != null)
message.SetHeaderFieldValue ("Accept-Encoding", accept_encoding);
if (request.Content != null) {
foreach (var header in request.Content.Headers) {
var value = string.Join (",", header.Value);
message.SetHeaderFieldValue (header.Key, value);
}
}
foreach (var header in request.Headers) {
if ((accept_encoding != null) && header.Key.Equals ("Accept-Encoding"))
continue;
var value = string.Join (",", header.Value);
message.SetHeaderFieldValue (header.Key, value);
}
if (UseCookies && (CookieContainer != null)) {
string cookieHeader = CookieContainer.GetCookieHeader (request.RequestUri);
if (cookieHeader != "")
message.SetHeaderFieldValue ("Cookie", cookieHeader);
}
}
public bool AddAuthentication (CFHTTPMessage failureResponse, NSString username,
NSString password, AuthenticationScheme scheme,
bool forProxy)
{
return CFHTTPMessageAddAuthentication (
Handle, failureResponse.Handle, username.Handle,
password.Handle, GetAuthScheme (scheme), forProxy);
}
public bool AppliesToRequest (CFHTTPMessage request)
{
ThrowIfDisposed ();
if (!request.IsRequest)
throw new InvalidOperationException ();
return CFHTTPAuthenticationAppliesToRequest (Handle, request.Handle);
}
