static HttpResponse RequestHandler(HttpRequest req)
{
DateTime startTime = DateTime.Now;
HttpResponse resp = null;
bool connAdded = false;
try
{
#region Unauthenticated-APIs
switch (req.Method)
{
case HttpMethod.GET:
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/loopback", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", "Hello from CryptoServer!", false);
return(resp);
}
break;
case HttpMethod.PUT:
case HttpMethod.POST:
case HttpMethod.DELETE:
default:
break;
}
#endregion
#region Add-to-Connection-List
_Connections.Add(Thread.CurrentThread.ManagedThreadId, req);
connAdded = true;
#endregion
#region APIs
if (!String.IsNullOrEmpty(req.RetrieveHeaderValue(_Settings.Auth.ApiKeyHeader)))
{
if (req.RetrieveHeaderValue(_Settings.Auth.ApiKeyHeader).Equals(_Settings.Auth.AdminApiKey))
{
#region Admin-API-Key
_Logging.Log(LoggingModule.Severity.Info, "RequestHandler use of admin API key detected for: " + req.RawUrlWithoutQuery);
switch (req.Method)
{
case HttpMethod.GET:
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/_cryptoserver/connections", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", _Connections.GetActiveConnections(), false);
return(resp);
}
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/_cryptoserver/config", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", _Settings, false);
return(resp);
}
break;
case HttpMethod.PUT:
case HttpMethod.POST:
case HttpMethod.DELETE:
default:
break;
}
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler unknown admin API endpoint: " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "Unknown API endpoint or verb", false);
return(resp);
#endregion
}
else if (req.RetrieveHeaderValue(_Settings.Auth.ApiKeyHeader).Equals(_Settings.Auth.CryptoApiKey))
{
#region Crypto-API-Key
string failureReason;
byte[] responseData;
Obj responseObj;
switch (req.Method)
{
case HttpMethod.POST:
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/decrypt", false))
{
Obj reqObj = Common.DeserializeJson <Obj>(req.Data);
if (!_Crypto.Decrypt(reqObj, out responseData, out failureReason))
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler unable to decrypt: " + failureReason);
resp = new HttpResponse(req, false, 500, null, "application/json", failureReason, false);
return(resp);
}
else
{
_Logging.Log(LoggingModule.Severity.Debug, "RequestHandler encrypt returning " + responseData.Length + " bytes");
resp = new HttpResponse(req, true, 200, null, "application/octet-stream", responseData, true);
return(resp);
}
}
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/encrypt", false))
{
if (!_Crypto.Encrypt(req.Data, out responseObj, out failureReason))
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler unable to encrypt: " + failureReason);
resp = new HttpResponse(req, false, 500, null, "application/json", failureReason, false);
return(resp);
}
else
{
resp = new HttpResponse(req, true, 200, null, "application/json", Common.SerializeJson(responseObj), true);
return(resp);
}
}
break;
case HttpMethod.GET:
case HttpMethod.PUT:
case HttpMethod.DELETE:
default:
break;
}
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler unknown crypto API endpoint: " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "Unknown API endpoint or verb", false);
return(resp);
#endregion
}
else
{
#region Invalid-Auth-Material
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler invalid API key supplied: " + req.RetrieveHeaderValue(_Settings.Auth.ApiKeyHeader));
resp = new HttpResponse(req, false, 401, null, "application/json", "Invalid API key", false);
return(resp);
#endregion
}
}
resp = new HttpResponse(req, false, 401, null, "application/json", "No authentication material", false);
return(resp);
#endregion
}
catch (Exception e)
{
_Logging.LogException("CryptoServer", "RequestHandler", e);
resp = new HttpResponse(req, false, 500, null, "application/json", "Internal server error", false);
return(resp);
}
finally
{
if (resp != null)
{
string message = "RequestHandler " + req.SourceIp + ":" + req.SourcePort + " " + req.Method + " " + req.RawUrlWithoutQuery;
message += " " + resp.StatusCode + " " + Common.TotalMsFrom(startTime) + "ms";
_Logging.Log(LoggingModule.Severity.Debug, message);
}
if (connAdded)
{
_Connections.Close(Thread.CurrentThread.ManagedThreadId);
}
}
}
static HttpResponse RequestHandler(HttpRequest req)
{
DateTime startTime = DateTime.Now;
HttpResponse resp = null;
Host currHost = null;
Node currNode = null;
string hostKey = null;
bool connAdded = false;
try
{
#region Unauthenticated-APIs
switch (req.Method)
{
case HttpMethod.GET:
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/_loadbalancer/loopback", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", "Hello from LoadBalancer!", false);
return(resp);
}
break;
case HttpMethod.PUT:
case HttpMethod.POST:
case HttpMethod.DELETE:
default:
break;
}
#endregion
#region Add-to-Connection-List
_Connections.Add(Thread.CurrentThread.ManagedThreadId, req);
connAdded = true;
#endregion
#region Authenticate-and-Admin-APIs
if (!String.IsNullOrEmpty(req.RetrieveHeaderValue(_Settings.Auth.AdminApiKeyHeader)))
{
if (req.RetrieveHeaderValue(_Settings.Auth.AdminApiKeyHeader).Equals(_Settings.Auth.AdminApiKey))
{
#region Admin-APIs
_Logging.Log(LoggingModule.Severity.Info, "RequestHandler use of admin API key detected for: " + req.RawUrlWithoutQuery);
switch (req.Method)
{
case HttpMethod.GET:
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/_loadbalancer/connections", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", _Connections.GetActiveConnections(), false);
return(resp);
}
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/_loadbalancer/config", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", _Settings, false);
return(resp);
}
if (WatsonCommon.UrlEqual(req.RawUrlWithoutQuery, "/_loadbalancer/hosts", false))
{
resp = new HttpResponse(req, true, 200, null, "application/json", _Hosts.Get(), false);
return(resp);
}
break;
case HttpMethod.PUT:
case HttpMethod.POST:
case HttpMethod.DELETE:
default:
break;
}
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler unknown admin API endpoint: " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "Unknown API endpoint or verb", false);
return(resp);
#endregion
}
else
{
#region Failed-Auth
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler invalid admin API key supplied: " + req.RetrieveHeaderValue(_Settings.Auth.AdminApiKeyHeader));
resp = new HttpResponse(req, false, 401, null, "application/json", "Authentication failed", false);
return(resp);
#endregion
}
}
#endregion
#region Find-Host-and-Node
if (req.Headers.ContainsKey("Host"))
{
hostKey = req.RetrieveHeaderValue("Host");
}
if (String.IsNullOrEmpty(hostKey))
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler no host header supplied for " + req.SourceIp + ":" + req.SourceIp + " " + req.Method + " " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "No host header supplied", false);
return(resp);
}
if (!_Hosts.SelectNodeForHost(hostKey, out currHost, out currNode))
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler host or node not found for " + req.SourceIp + ":" + req.SourceIp + " " + req.Method + " " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "Host or node not found", false);
return(resp);
}
else
{
if (currHost == null || currHost == default(Host))
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler host not found for " + req.SourceIp + ":" + req.SourceIp + " " + req.Method + " " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "Host not found", false);
return(resp);
}
if (currNode == null || currNode == default(Node))
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler node not found for " + req.SourceIp + ":" + req.SourceIp + " " + req.Method + " " + req.RawUrlWithoutQuery);
resp = new HttpResponse(req, false, 400, null, "application/json", "No node found for host", false);
return(resp);
}
_Connections.Update(Thread.CurrentThread.ManagedThreadId, hostKey, currHost.Name, currNode.Hostname);
}
#endregion
#region Process-Connection
if (currHost.HandlingMode == HandlingMode.Redirect)
{
#region Redirect
string redirectUrl = BuildProxyUrl(currNode, req);
// add host header
Dictionary <string, string> requestHeaders = new Dictionary <string, string>();
// add other headers
if (req.Headers != null && req.Headers.Count > 0)
{
List <string> matchHeaders = new List <string> {
"host", "connection", "user-agent"
};
foreach (KeyValuePair <string, string> currHeader in req.Headers)
{
if (matchHeaders.Contains(currHeader.Key.ToLower().Trim()))
{
continue;
}
else
{
requestHeaders.Add(currHeader.Key, currHeader.Value);
}
}
}
// process REST request
RestResponse restResp = RestRequest.SendRequestSafe(
redirectUrl,
req.ContentType,
req.Method.ToString(),
null, null, false,
Common.IsTrue(currHost.AcceptInvalidCerts),
requestHeaders,
req.Data);
if (restResp == null)
{
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler null proxy response from " + redirectUrl);
resp = new HttpResponse(req, false, 500, null, "application/json", "Unable to contact node", false);
return(resp);
}
else
{
resp = new HttpResponse(req, true, restResp.StatusCode, restResp.Headers, restResp.ContentType, restResp.Data, true);
return(resp);
}
#endregion
}
else if (currHost.HandlingMode == HandlingMode.Proxy)
{
#region Proxy
string redirectUrl = BuildProxyUrl(currNode, req);
Dictionary <string, string> redirectHeaders = new Dictionary <string, string>();
redirectHeaders.Add("location", redirectUrl);
resp = new HttpResponse(req, true, _Settings.RedirectStatusCode, redirectHeaders, "text/plain", _Settings.RedirectStatusString, true);
return(resp);
#endregion
}
else
{
#region Unknown-Handling-Mode
_Logging.Log(LoggingModule.Severity.Warn, "RequestHandler invalid handling mode " + currHost.HandlingMode + " for host " + currHost.Name);
resp = new HttpResponse(req, false, 500, null, "application/json", "Invalid handling mode '" + currHost.HandlingMode + "'", false);
return(resp);
#endregion
}
#endregion
}
catch (Exception e)
{
_Logging.LogException("LoadBalancer", "RequestHandler", e);
resp = new HttpResponse(req, false, 500, null, "application/json", "Internal server error", false);
return(resp);
}
finally
{
if (resp != null)
{
string message = "RequestHandler " + req.SourceIp + ":" + req.SourcePort + " " + req.Method + " " + req.RawUrlWithoutQuery;
if (currNode != null)
{
message += " " + hostKey + " to " + currNode.Hostname + ":" + currNode.Port + " " + currHost.HandlingMode;
}
message += " " + resp.StatusCode + " " + Common.TotalMsFrom(startTime) + "ms";
_Logging.Log(LoggingModule.Severity.Debug, message);
}
if (connAdded)
{
_Connections.Close(Thread.CurrentThread.ManagedThreadId);
}
}
}