I am trying to measure the response time of a server call (at Client Side) until the reply, but I am getting very small response times (ex 4ms, 5ms etc).
My code (written in java) creates a bunch of requests.
I can measure the response time with adding the Timestamp before http request with the one after server response.
Reply Timestamp - Call Timestamp = Response Time
CallStamp = System.currentTimeMillis(); // Http call stamp
lastHTMLReply = callHTTPServer(lastURL); // Http call
ReplyStamp = System.currentTimeMillis(); // Http reply stamp
response = ReplyStamp - CallStamp ; // response time
Related
Suppose I have a client that continually requests streams from a service, and I want automate testing it. So, as part of the test, I create a service that returns a stream. The following code snippet constructs the response and returns it:
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StreamContent(fstream);
response.Content.Headers.ContentType = mediaType;
return response;
This works for the success case where the client calls the API and gets a response in a timely manner. But I also want to simulate some timeout failures.
If I want to simulate timeouts before any part of the response is returned, i can simply add a Thread.Sleep() before return response.
My question is: how can I simulate the timeout case where the service has already started return response? I would like to simulate the service timing out after the response headers have been sent, but before the entirety of fstream is sent.
Maybe try something like this?
var response = HttpContext.Current.Response;
response.Buffer = false;
response.AddHeader("SomeHeader","SomeValue");
response.Write("Some body text.");
System.Threading.Thread.Sleep(WEB_SERVER_TIMEOUT_VALUE + 1);
I am trying to resume an upload from google drive, I have the id of the file when I close the connection I make this session after the Internet is connected again:
var request = (HttpWebRequest)WebRequest.Create(fileUri);
request.Method = "PUT";
request.ContentLength = 0;
request.Headers.Add("Content-Range", "bytes */" + FileByteArray.Length);
try
{
var response = request.GetResponse();
}
catch (WebException e)
{
fileRange = e.Response.Headers.Get("Range");
}
}
I am not getting the Range header, why is that?
Content-Range indicates which range of the original entity is contained in the body of either a request (like your PUT request) or a 206 partial response. Range is set by the client not the server in order to request a sub-range. I would assume that the server you are talking to will not respond with the uploaded chunk, so a Content-Range (and Range in no case) will not be present as a response header.
In your code snippet the actual upload range is missing for Content-Range (see the updated HTTP RFC). It has to have the form of:
Content-Range: bytes 42-1233/1234
which means: upload byte 42-1233 of an entity whose total size is 1234 byte.
Or when the complete length is unknown:
Content-Range: bytes 42-1233/*
So remove the check for the Range header and specify the complete upload range and you should be fine.
We are sending JsonConvert.SerializeObject(lstobject); to the URL here. lstobject is a large list sent to the url.error also returned after 3 minutes to log error how to make webrequest to wait 5 minutes.
var httpWebRequest = (HttpWebRequest)WebRequest
.Create(ConfigurationManager.AppSettings["JsonPayloadPostUrl"]
.ToString());
httpWebRequest.Timeout = 1000000;
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
streamWriter.Write(jsonPayload);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var responseText = streamReader.ReadToEnd();
}
Ee have used httpWebRequest.Timeout = 1000000; but the server is unable to send request back in less than 5 minutes. How to make request to wait for server for response ?
I might be missing something reading your question, but HTTP 500 server error means that the server has provided a response, saying it encountered some internal issue. So you cannot prevent it by setting a bigger timeout on the Request side.
Following https://www.w3.org/Protocols/HTTP/HTRESP.html
Internal Error 500
The server encountered an unexpected condition which prevented it from
fulfilling the request.
I would say either your request is not properly built, or the server has some application-side issue.
Coming back to the timeout setting way, I think it looks properly. Please note that this time might be taking into account topics like DNS name resolution etc. which in turn might require a bit more time than it seems in the first place. This shouldn't be a problem in your case though, looking at the value you are trying to set.
I have a server which can send response of any size.
When I make calls of with response size 1MB the WSO2 api manger works fine. (1000 requests per minute)
When we make same calls with response size of 10MB the WSO2 api manager initially cuts down the size of responnse and finally becomes 0 sized responses. With 1000 requests per minute only first 28 requests response back with 10MB others are lesser size.
I have tried hitting the backend service directly with 10MB response sizes and all the responses are 10MB.
Here is my server.js (written for nodejs)
var http = require("http");
var url = require('url');
var server = http.createServer(function(request, response) {
var params = url.parse(request.url, true).query;
var size = parseInt(params.size);
var buffer = new Buffer(size);
buffer.fill("a");
response.write(buffer.toString());
response.end();
});
server.listen(8083);
console.log("Server is listening");
WSO2 hits this server with a parameter size.
My direct http call looks like
wget http://A.B.C.D:8083/?size=10485760
My WSO2 call looks like
wget --header="Authorization: Bearer Xobzt7lefiMadwt4u4Vp9q93dR8a" -qO- http://E.F.G.H:8280/loadtest/1.0/?size=10485760
Log shows the error with stack trace
java.lang.IllegalStateException: I/O reactor has been shut down
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.connect(DefaultConnectingIOReactor.java:229)
at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncRequest(HttpCoreNIOSender.java:366)
at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:252)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442)
at org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.send(DynamicAxisOperation.java:185)
at org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:167)
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149)
at org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:460)
at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:57)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:325)
at org.apache.synapse.endpoints.AbstractEndpoint.send(AbstractEndpoint.java:329)
at org.apache.synapse.endpoints.AddressEndpoint.send(AddressEndpoint.java:59)
at org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:95)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
at org.apache.synapse.mediators.filters.FilterMediator.mediate(FilterMediator.java:112)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:114)
at org.apache.synapse.rest.Resource.process(Resource.java:297)
at org.apache.synapse.rest.API.process(API.java:308)
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:76)
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:63)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:191)
at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:83)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.axis2.transport.http.util.RESTUtil.invokeAxisEngine(RESTUtil.java:144)
at org.apache.axis2.transport.http.util.RESTUtil.processURLRequest(RESTUtil.java:139)
at org.apache.synapse.transport.nhttp.util.RESTUtil.processGetAndDeleteRequest(RESTUtil.java:146)
at org.apache.synapse.transport.nhttp.DefaultHttpGetProcessor.processGetAndDelete(DefaultHttpGetProcessor.java:464)
at org.wso2.carbon.transport.nhttp.api.NHttpGetProcessor.process(NHttpGetProcessor.java:296)
Which will be followed by
[2013-11-16 17:25:12,679] INFO - LogMediator To: , MessageID: urn:uuid:aec86528-8132-4329-9262-9204a9f1317c, Direction: response, STATUS = Executing default 'fault'
sequence, ERROR_CODE = 504, ERROR_MESSAGE = Send timeout, Envelope: 0Status reportRuntime ErrorUnexpected error during sending message out
I am trying to call a webservice that return too much data just to extract a small piece of data.
So, I decided not to use the standard Client which is generated by Java.
I use the following code to do the connection:
HttpURLConnection connection;
byte[] requestData = .....
URL url = new URL(wsUrl);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "text/xml");
connection.setRequestProperty("Content-Length", String.valueOf(requestData.length));
connection.connect();
OutputStream connOs = connection.getOutputStream();
connOs.write(requestData);
connOs.close();
InputStream is = connection.getInputStream(); // <<< THIS IS THE MOST TIME CONSUMING, it takes about 70 ms
byte[] rply = stream2Bytes(is);
is.close();
connection.disconnect();
The most time is consumed in the call to connection.getInputStream(); which it takes about 70ms.
I am trying setting many request headers to reduce this time but cannot reach.
My understanding it that the HttpUrlConnection uses HTTP1.1 protocol that uses Connection=KEEP-ALIVE header by default so that the underlying TCP connection is reused.
connection.getInputStream(); - function which wait for server response... you can't speed up this proccess.