I'm not positive my issue is entirely code or a network issue, though not likely as my site works otherwise. In a round-about description, I've created a website that is hosted in the DMZ of my employer. It's an MVC asp.net C# webform that submits test payment transaction data to a test production environment within the company. A user fills in some fields, and presses the submit button in IE and IE takes over from there and displays the response from the internal test production server. So far, so good. Now..., I'm changing it so the submission goes through a Controller I have, grabbing the data and sending it to the same internal test production server where I'm now getting an exception on the 'Stream datastream...' line.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(selectedServer); // Create a request using a URL that can receive a post.
request.Method = "POST"; // Set the Method property of the request to POST.
byte[] byteArray = Encoding.UTF8.GetBytes(TransactionData);
request.ContentType = "application/x-www-form-urlencoded"; // Set the ContentType property of the WebRequest.
request.ContentLength = byteArray.Length; // Set the ContentLength property of the WebRequest.
Stream dataStream = request.GetRequestStream(); // Get the request stream.
dataStream.Write(byteArray, 0, byteArray.Length); // Write the data to the request stream.
dataStream.Close(); // Close the Stream object.
WebResponse response = request.GetResponse(); // Get the response.
The exception is: System.Net.Sockets.SocketException
"A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 'some.ip.address.255:7969' at System.Net"
The TransactionData is a string.
Thanks in advance and let me know if more information is needed.
Solved. Turns out I needed to add a host entry pointing to the internal server!
Maybe someone in the future will find this just as useful?
Related
I have built wcf. it is working well
The issue is when I call it many times it displays the following error:
The server encountered an error processing the request. See server
logs for more details
I configured a WCF Tracing File but it remains always empty. what can be the reason of this sudden stop of the service and how to fix it?
Here is the code that I use at the client's side every 20 seconds:
string url = "http://host/Service.svc/method";
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);
webrequest.Method = "GET";
ASCIIEncoding encoding = new ASCIIEncoding();
HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();
Encoding enc = System.Text.Encoding.GetEncoding("utf-8");
StreamReader loResponseStream =
new StreamReader(webresponse.GetResponseStream(), enc);
string strResult = loResponseStream.ReadToEnd();
loResponseStream.Close();
webresponse.Close();
I fixed the issue. it was due to open database connections. I missed to close, at the server side, the database connections. Thank you for answer
It could be a working memory issue on the server/host. If there's less than 5% available you get no response.
I am new to .net and APIs and am currently using .Net 4.5 to connect to an API using rest. The problem I am having is I get an exception thrown back in the return xml that says "Cannot forward request to server with name", "Cannot read data from connection", Connection reset", full error below.
What is odd is this script works fine on smaller datasets but when the response is large enough, I get that exception from the server thrown back. What has helped setting the keep alive to true, using httpversion10, and specifying gzip and sendchunked. I am using advanced rest client to test the server in chrome addins and it returns data fine on there with these larger dataset. It will not with the script below. I am suspecting there is a difference in the way I am telling the server to handle my response verses the chrome add in. Any suggestions on how I improve the performance of this?
This is what the advanced rest client settings look like that work for the Chrome add in.
This is the code I have which appears to need changes to make it handle the request/response better.
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(#"magicalwebsite");
req.KeepAlive = true;
req.ProtocolVersion = HttpVersion.Version10;
req.ServicePoint.ConnectionLimit = 24;
req.Timeout = 2000000000;
req.Method = "Post";
req.Accept = "*/*";
req.SendChunked = true;
req.AutomaticDecompression = DecompressionMethods.GZip;
//Xml request file for data
string postData = System.IO.File.ReadAllText(#"C:\Users\yo\Desktop\testtest.txt");
//sending header and content
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
req.ContentType = "text/xml";
req.ContentLength = byteArray.Length;
req.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.Default.GetBytes("xxxx:xxxxx"));
Stream dataStream = req.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
//Requesting response of data
HttpWebResponse resp = req.GetResponse() as HttpWebResponse;
//Grabbing response
using (Stream stream = resp.GetResponseStream())
{
StreamReader reader = new StreamReader(stream, Encoding.UTF8);
String responseString = reader.ReadToEnd();
}
This is the exception I am getting in the xml being thrown back.
<?xml version="1.0" encoding="UTF-8"?>
<response success="false">
<messages>
<message key="exception-caught">Caught Exception: Caught Exception:
Cannot forward request to server with name=prod-euapp01
com.magicalpony.exception.APException: Cannot forward request to server with name=prod-euapp01
at com.magicalpony.webservices.APIForwarder.forward(APIForwarder.java:105)
at com.magicalpony.webservices.APIServlet.forwardRequest(APIServlet.java:270)
at com.magicalpony.webservices.APIServlet.wrongServer(APIServlet.java:253)
at com.magicalpony.webservices.APIServlet.service(APIServlet.java:124)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:210)
at com.magicalpony.system.WebServiceMonitor.doFilter(WebServiceMonitor.java:61)
at org.apache.catalina.core.
ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.magicalpony.system.HitTracer.doFilter(HitTracer.java:133)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:399)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:303)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:183)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:169)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:311)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: com.magicalpony.exception.APException:
Cannot read data from connection
at com.magicalpony.webservices.NetUtil.readData(NetUtil.java:61)
at com.magicalpony.webservices.APIForwarder.forward(APIForwarder.java:102)
... 26 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:196)
at
java.net.SocketInputStream.read(SocketInputStream.java:122)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1323)
at com.magicalpony.webservices.NetUtil.readData(NetUtil.java:58)
... 27 more</message>
</messages>
</response>
The problem is with DNS resolution.
Step 1: Enter your domain name in a browser and see if Server is available.
Step 2: If server is available with domain name then you got to fix the IP Address or DNS resolution.
You can fix this by updating the IP Address in your PC (Follow steps below)
Go to a folder: C:\Windows\System32\drivers\etc
Copy and paste "hosts" file to desktop.
Update your host file with your IP Address and domain name.
Step 3: Copy and Paste hosts file in original folder (C:\Windows\System32\drivers\etc).
Step 4: Test your API.
I'm trying to get data from the Microsoft Live API. However, when I try to get the access_token, I instead get a 415(Unsupported Media Type) error message. I have looked pretty much everywhere, but I can't find any answer (that worked for me).
Here is my (partial) code that tries to get the token (dataToWrite is cut-up for readability, it's one line in the actual code):
WebRequest request;
request = WebRequest.Create("https://login.live.com/oauth20_token.srf");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
var dataToWrite = "code=[code]&
client_id=[client_id]&
client_secret=[client_secret]&
redirect_uri=[redirect_uri]&
grant_type=authorization_code";
var buffer = Encoding.ASCII.GetBytes(dataToWrite);
request.ContentLength = buffer.Length;
var dataStream = request.GetRequestStream();
dataStream.Write(buffer, 0, buffer.Length);
dataStream.Close();
var response = request.GetResponse();
var responseStream = response.GetResponseStream();
Where the '[]' are:
[code] is a string, given by Microsoft after user logs in (this part of the code works);
[client_id] is a string, given by Microsoft, representing my client id;
[client_secret] is a string, given by Microsoft, representing my client secret;
[redirect_uri] is the URL of the site's return location (same as the URL used in the code for the user consent(see [code]))
According to the manual of Microsoft Live API(http://msdn.microsoft.com/en-us/library/live/hh243647.aspx) this should work. However, the documentation isn't very detailed.
Does anyone know why I keep getting the error?
Thanks!
Never mind, I'm an idiot...
It does work after all. I did another request after this one. And that one failed because I did not include the parameters there.
how would I be able to do something like http://myanimelist.net/modules.php?go=api#verifycred
aka "curl -u user:password http://myanimelist.net/api/account/verify_credentials.xml"
I wish to option the id
my code so far is
string url = "http://myanimelist.net/api/account/verify_credentials.xml";
WebRequest request = WebRequest.Create(url);
request.ContentType = "xml";
request.Method = "GET";
request.Credentials = new NetworkCredential(username, password);
byte[] buffer = Encoding.GetEncoding("UTF-8").GetBytes("xml/user/id"); // i think this line?
Stream reqstr = request.GetRequestStream();
reqstr.Write(buffer, 0, buffer.Length);
reqstr.Close();
but I get a error on "reqstr.Write(buffer, 0, buffer.Length)"
Cannot send a content-body with this verb-type, I have tried googling but with no prevail, I am using c#
Your snippet is trying to send a GET request with request data (you're calling GetRequestStream and then writing some data to the request stream). The HTTP protocol does not allow this - you can only send data with POST request.
However, the API that you are trying to call is actually doing something different - you do not need to send it the XML data. The XML data (with user ID and user name) is the response that you get when you successfully login.
So, instead of calling GetRequestStream and writing the XML data, you need to call GetResponse and then GetResponseStream to read the XML data!
I am working on a client that uses a webservice to get some events pushed its way - the webservice is designed so, that upon the client POST'ing a subscribe command, it will send back some events of interest and keep doing so as long as the client stay connected.
When POSTing the command, the service responds (immediately) with an initial answer with these headers
Keep-Alive: timeout=5, max=98
Connection: Keep-Alive
Transfer-Encoding: chunked
and then keeps the connection open until it times out (after 30s, if the client does not send some keep-alive data)
Since it is a mix of POST + having to read the response + keeping the connection open until endOFStream, it appears I have to use HttpWebRequest with BeginGetRequestStream (to POST) and BeginGetResponse to read and act on the response.
My problem is that the BeginGetResponse callback is not called until the input stream is actually closed by the server/service (after 30s), despite AllowReadStreamBuffering being set to false.
The doc have this to say on AllowReadStreamBuffering:
The AllowReadStreamBuffering property affects when the callback from BeginGetResponse method is called. When the AllowReadStreamBuffering property is true, the callback is raised once the entire stream has been downloaded into memory. When the AllowReadStreamBuffering property is false, the callback is raised as soon as the stream is available for reading which may be before all data has arrived.
I've seen a few suggestions that no matter what AllowReadStreamBuffering is set to, HttpWebRequest will not call BeginGetResponse until it's buffer is filled up - but I have not been able to find anything on that in the docs.
Does any one have an idea on how to control this buffering behaviour or maybe suggestion to another approach I should try when dealing with this kind of webservice?
The relevant snippets of the code I currently use, look like this:
public void open()
{
string url = "http://funplaceontheinternet/webservice";
HttpWebRequest request = WebRequest.CreateHttp(url);
request.Method = "POST";
request.Credentials = new NetworkCredential("username", "password");
request.CookieContainer = new CookieContainer();
request.AllowReadStreamBuffering = false;
request.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), request);
}
void GetRequestStreamCallback(IAsyncResult result)
{
Debug.WriteLine("open.GetRequestStreamCallback");
HttpWebRequest webRequest = (HttpWebRequest)result.AsyncState;
// End the stream request operation
Stream postStream = webRequest.EndGetRequestStream(result);
// Create the post data
byte[] byteArray = Encoding.UTF8.GetBytes(_xmlEncodedSubscribeCommand);
// Add the post data to the web request
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
// Start the web request
webRequest.BeginGetResponse(new AsyncCallback(BeginGetResponseCallback), webRequest);
}
void BeginGetResponseCallback(IAsyncResult result)
{
HttpWebRequest request = (HttpWebRequest)result.AsyncState;
HttpWebResponse response = null;
if (request != null)
response = (HttpWebResponse)request.EndGetResponse(result);
else
Debug.WriteLine("request==null :-(");
if (response != null)
{
using (var reader = new StreamReader(response.GetResponseStream()))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
Debug.WriteLine("BeginGetResponseCallback - received: " + line);
}
Debug.WriteLine("BeginGetResponseCallback - reader.EndOfStream");
}
}
else
Debug.WriteLine("response==null :-(");
}
You've mentioned that the service is a web service, but not which platform.
If this is a "normal" web service, then I assume that XML is the transport format.
If so, I suspect the problem may be that this style of communication does not really lend itself to streaming. The web service infrastructure at the server end might not be creating the SOAP envelope and payload until all the data is available. If you wanted to stream like this, you might be better using some custom service at the server end, rather than a web service.
Do you know for sure that the server is really streaming the response? (e.g confirmed with something like wireshark?)
If you really want to use a web service, then I would suggest you complete the request when the first event(s) are available, and don't wait for the timeout. This will still achieve the latency reduction that I assume you are trying to get.