/// <summary>
/// Method that process the url
/// </summary>
/// <param name="request">Information sent by the browser about the request</param>
/// <param name="response">Information that is being sent back to the client.</param>
/// <param name="session">Session used to </param>
public override bool Process(HttpRequest request, HttpResponse response, IHttpSession session)
{
if (!CanHandle(request.Uri))
return false;
bool handled = false;
foreach (HttpModule module in _modules)
{
if (module.Process(request, response, session))
handled = true;
}
if (!handled)
response.Status = HttpStatusCode.NotFound;
return true;
}
/// <summary>
/// Will request authentication.
/// </summary>
/// <remarks>
/// Sends respond to client, nothing else can be done with the response after this.
/// </remarks>
/// <param name="mod"></param>
/// <param name="request"></param>
/// <param name="response"></param>
protected virtual void RequestAuthentication(AuthenticationModule mod, HttpRequest request, HttpResponse response)
{
string theResponse = mod.CreateResponse(GetRealm(request));
response.AddHeader("www-authenticate", theResponse);
response.Reason = "Authentication required.";
response.Status = HttpStatusCode.Unauthorized;
}
/// <summary>
/// Handle authentication
/// </summary>
/// <param name="request"></param>
/// <param name="response"></param>
/// <param name="session"></param>
/// <returns>true if request can be handled; false if not.</returns>
/// <exception cref="BadRequestException">Invalid authorization header</exception>
protected virtual bool ProcessAuthentication(HttpRequest request, HttpResponse response, IHttpSession session)
{
if (_authModules.Count > 0)
{
bool authenticate = false;
object authTag = null;
if (request.Headers["authorization"] != null)
{
authenticate = true;
string authHeader = request.Headers["authorization"];
int pos = authHeader.IndexOf(' ');
if (pos == -1)
throw new BadRequestException("Invalid authorization header");
// first word identifies the type of authentication to use.
string word = authHeader.Substring(0, pos).ToLower();
// find the mod to use.
AuthenticationModule mod = null;
lock (_authModules)
{
foreach (AuthenticationModule aModule in _authModules)
{
if (aModule.Name != word)
continue;
mod = aModule;
break;
}
}
if (mod != null)
{
authTag = mod.Authenticate(authHeader, GetRealm(request), request.Method);
session[AuthenticationModule.AuthenticationTag] = authTag;
}
}
// Check if auth is needed.
if (authTag == null)
{
lock (_authModules)
{
foreach (AuthenticationModule module in _authModules)
{
if (!module.AuthenticationRequired(request))
continue;
RequestAuthentication(module, request, response);
return false;
}
// modules can have inited the authentication
// and then the module.AuthenticationRequired method will not have been used.
if (authenticate && _authModules.Count > 0)
{
RequestAuthentication(_authModules[0], request, response);
return false;
}
}
}
}
return true;
}
/// <summary>
/// Process an incoming request.
/// </summary>
/// <param name="context">connection to client</param>
/// <param name="request">request information</param>
/// <param name="response">response that should be filled</param>
/// <param name="session">session information</param>
protected virtual void HandleRequest(HttpClientContext context, HttpRequest request, HttpResponse response,
IHttpSession session)
{
_logWriter.Write(this, LogPrio.Trace, "Processing request....");
bool handled = false;
try
{
DecodeBody(request);
if (ProcessAuthentication(request, response, session))
{
foreach (HttpModule module in _modules)
{
if (!module.Process(request, response, session))
continue;
handled = true;
if (!module.AllowSecondaryProcessing)
break;
}
}
}
catch (HttpException err)
{
if (err.HttpStatusCode == HttpStatusCode.Unauthorized)
{
AuthenticationModule mod;
lock (_authModules)
mod = _authModules.Count > 0 ? _authModules[0] : null;
if (mod != null)
RequestAuthentication(mod, request, response);
}
else
ErrorPage(response, err);
}
if (!handled && response.Status == HttpStatusCode.OK)
ErrorPage(response, HttpStatusCode.NotFound, "Resource not found: " + request.Uri);
if (!response.HeadersSent)
{
// Dispose session if it was not used.
if (session.Count > 0)
{
_sessionStore.Save(session);
// only set session cookie if it have not been sent in the request.
if (request.Cookies[_sessionCookieName] == null)
response.Cookies.Add(new ResponseCookie(_sessionCookieName, session.Id, DateTime.MinValue));//DateTime.Now.AddMinutes(20).AddDays(1)));
}
else
_sessionStore.AddUnused(session);
}
if (!response.Sent)
response.Send();
_logWriter.Write(this, LogPrio.Trace, "....done.");
}
/// <summary>
/// Generate a HTTP error page (that will be added to the response body).
/// response status code is also set.
/// </summary>
/// <param name="response">Response that the page will be generated in.</param>
/// <param name="err">exception.</param>
protected virtual void ErrorPage(HttpResponse response, HttpException err)
{
response.Reason = err.GetType().Name;
response.Status = err.HttpStatusCode;
response.ContentType = "text/plain";
StreamWriter writer = new StreamWriter(response.Body);
#if DEBUG
writer.WriteLine(err);
#else
writer.WriteLine(err.Message);
#endif
writer.Flush();
}
/// <summary>
/// Generate a HTTP error page (that will be added to the response body).
/// response status code is also set.
/// </summary>
/// <param name="response">Response that the page will be generated in.</param>
/// <param name="error"><see cref="HttpStatusCode"/>.</param>
/// <param name="body">response body contents.</param>
protected virtual void ErrorPage(HttpResponse response, HttpStatusCode error, string body)
{
response.Reason = "Internal server error";
response.Status = error;
response.ContentType = "text/plain";
StreamWriter writer = new StreamWriter(response.Body);
writer.WriteLine(body);
writer.Flush();
}
public OSHttpResponse(HttpResponse resp, IHttpClientContext clientContext)
{
_httpResponse = resp;
_httpClientContext = clientContext;
}
void RequestHandler(IHttpClientContext client, IHttpRequest request)
{
HttpResponse response = new HttpResponse(client, request);
// Create a request signature
HttpRequestSignature signature = new HttpRequestSignature(request);
// Look for a signature match in our handlers
for (int i = 0; i < requestHandlers.Length; i++)
{
HttpRequestHandler handler = requestHandlers[i];
if (handler.Signature != null && signature == handler.Signature)
{
FireRequestCallback(client, request, response, handler.Callback);
return;
}
}
// No registered handler matched this request's signature
if (notFoundHandler != null)
{
FireRequestCallback(client, request, response, notFoundHandler);
}
else
{
// Send a default 404 response
try
{
response.Status = HttpStatusCode.NotFound;
response.Reason = String.Format("No request handler registered for Method=\"{0}\", Content-Type=\"{1}\", Path=\"{2}\"",
signature.Method, signature.ContentType, signature.Path);
string notFoundResponse = "<html><head><title>Page Not Found</title></head><body><h3>" + response.Reason + "</h3></body></html>";
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(notFoundResponse);
response.Body.Write(buffer, 0, buffer.Length);
response.Send();
}
catch (Exception) { }
}
}
public OSHttpResponse(HttpServerLib.HttpResponse resp, HttpServerLib.HttpClientContext clientContext)
{
_httpResponse = resp;
_httpClientContext = clientContext;
}
/// <summary>
/// Instantiate an OSHttpResponse object from an OSHttpRequest
/// object.
/// </summary
/// <param name="req">Incoming OSHttpRequest to which we are
/// replying</param>
public OSHttpResponse(OSHttpRequest req)
{
_httpResponse = new HttpServerLib.HttpResponse(req.HttpClientContext, req.HttpRequest);
_httpClientContext = req.HttpClientContext;
}
public OSHttpResponse(HttpServerLib.HttpResponse resp)
{
_httpResponse = resp;
}
/// <summary>
/// Method that process the url
/// </summary>
/// <param name="request">Information sent by the browser about the request</param>
/// <param name="response">Information that is being sent back to the client.</param>
/// <param name="session">Session used to </param>
public override bool Process(HttpRequest request, HttpResponse response, IHttpSession session)
{
if (!CanHandle(request.Uri))
return false;
int pos = request.Uri.OriginalString.IndexOf(_sourceUrl);
if (pos == -1)
throw new InternalServerException("Failed to find source url '" + _sourceUrl + "' for proxy.");
string sourceUrl = request.Uri.OriginalString.Substring(0, pos + _sourceUrl.Length);
string newUrl = request.Uri.OriginalString.Replace(sourceUrl, _destinationUrl);
Uri url = new Uri(newUrl);
WebClient client = new WebClient();
try
{
byte[] bytes = client.DownloadData(url);
string content = client.ResponseHeaders[HttpResponseHeader.ContentType];
response.ContentType = content;
string contentLengthStr = client.ResponseHeaders[HttpResponseHeader.ContentLength];
int contentLength;
int.TryParse(contentLengthStr, out contentLength);
response.ContentLength = contentLength;
if (content.StartsWith("text/html"))
{
string data = client.Encoding.GetString(bytes);
StreamWriter writer = new StreamWriter(response.Body, client.Encoding);
writer.Write(data.Replace(_destinationUrl, sourceUrl).Replace("href=\"/", "href=\"" + _sourceUrl));
writer.Write(data.Replace(_destinationUrl, sourceUrl).Replace("src=\"/", "src=\"" + _sourceUrl));
}
else
response.Body.Write(bytes, 0, bytes.Length);
}
catch (WebException err)
{
throw new InternalServerException("Failed to proxy " + url, err);
}
catch (NotSupportedException err)
{
throw new InternalServerException("Failed to proxy " + url, err);
}
catch (IOException err)
{
throw new InternalServerException("Failed to proxy " + url, err);
}
catch (FormatException err)
{
throw new InternalServerException("Failed to proxy " + url, err);
}
catch (ObjectDisposedException err)
{
throw new InternalServerException("Failed to proxy " + url, err);
}
catch (ArgumentNullException err)
{
throw new InternalServerException("Failed to proxy " + url, err);
}
return true;
}
void ev_headersdone()
{
_server.ev_debug("======================================================================");
_server.ev_debug(_firstline);
foreach (var headerline in _headerlines)
_server.ev_debug(headerline);
_server.ev_debug("--------------------------------------");
string[] splits = _firstline.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
if (splits.Length != 3) {
_Fail(HttpStatusCode.HttpVersionNotSupported);
return;
}
string httpversion = splits[2].Trim().ToUpper();
if (!httpversion.StartsWith("HTTP/")) {
_Fail(HttpStatusCode.HttpVersionNotSupported);
return;
}
if (httpversion.EndsWith("1.0")) {
_ishttp10 = true;
}
HttpMethod meth;
switch (splits[0].Trim().ToUpper()) {
case "HEAD": meth = HttpMethod.Head; break;
case "GET": meth = HttpMethod.Get; break;
case "PUT": meth = HttpMethod.Put; break;
case "DELETE": meth = HttpMethod.Delete; break;
case "POST": meth = HttpMethod.Post; break;
default: _Fail(HttpStatusCode.NotImplemented); return;
}
var request = new HttpRequest(this, meth, splits[1]);
var response = new HttpResponse(this, meth);
_tx = new HttpTransaction(_server, this, request, response);
bool needs100continue = false;
foreach (var line in _headerlines) {
int colon_index = line.IndexOf(':');
if (colon_index < 0) {
_Fail(HttpStatusCode.BadRequest);
return;
}
string key = line.Substring(0, colon_index).Trim();
string value = line.Substring(colon_index + 1).Trim();
request.Headers.SetHeader(key, value);
if (key == "Connection" && value.ToLower() == "close") {
_isconnectionclose = true;
}
if (key == "Expect" && value.ToLower() == "100-continue") {
needs100continue = true;
}
}
if (needs100continue) {
ev_need100continue();
} else {
ev_requestbodyready();
}
}
internal void _BeginResponse(HttpResponse response, HttpStatusCode status, Action<HttpBuffer> ev_buffer, Action/*?*/ ev_done = null)
{
lock (_server._lock) {
if (_isdisposed) return; // this is not the right place to throw
if (_state != _State.ResponseHeadersUserWait && _state != _State.RequestBodyUserWait)
throw new InvalidOperationException("invalid state for response body streaming (" + _state + ")");
if (_responsebody_streaming_started)
throw new InvalidOperationException("request body can only be streamed once");
if (_tx == null || _tx.Response != response)
throw new InvalidOperationException("this request object is not active");
_server.ev_debug("begin response");
_responsebody_buffer = new ResponseBodyBuffer(this);
_responsebody_user_cb = ev_buffer;
if (_responsebody_done_cb != null) throw new InvalidOperationException("resources may have leaked");
_responsebody_done_cb = ev_done;
if (!response.Headers.ContentLength.HasValue && !_ishttp10) {
response.Headers.SetChunkedEncoding();
}
StringBuilder sb = new StringBuilder();
sb.AppendFormat("HTTP/{0} {1} {2}\r\n", (_ishttp10?"1.0":"1.1"), (int)status, _Utils.Stringify(status));
response.Headers.Write(sb, response.Cookies.Values);
_server.ev_debug("{0}", sb.ToString());
_server.ev_debug("--------------------------------------");
_responsebody_left = response.Headers.ContentLength ?? -1;
_writebytes = Encoding.UTF8.GetBytes(sb.ToString());
_writecount = _writebytes.Length;
_writeoff = 0;
if (_state == _State.RequestBodyUserWait) { // if we are still waiting for the user to read the request body, dump it
_state = _State.RequestBodyDump;
} else {
_state = _State.SendResponseHeaders;
}
_HandleCurrentState();
}
}
internal HttpTransaction(HttpServer server, HttpServer._Connection connection, HttpRequest request, HttpResponse response)
{
_server = server;
_request = request;
_response = response;
_connection = connection;
}
