CODEWITHSUNDEEP
c#.nethttpwebrequest
katit
katit

Reputation: 17915

Web request timeout exception. How to properly read it?

How is this exception possible?

I'm calling google service as shown below. My logs identified that I get Timeout exception on line var requestStream = request.GetRequestStream();

I didn't even place it inside catch block because I thought reading stream is getting it from string (which is pretty small). So, how can I get timeout on this? Is it possible that google server takes time and reading happens slow and I'm getting this?

// Google had issues with SSL certificates. We know address is good, so just kill validation
            // and trust any certificate it might have..
            ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, errors) => true;


// Prepare HTTPS request. 5 seconds timeout should be good for google.
            const string Uri = "https://android.apis.google.com/c2dm/send";
            var request = (HttpWebRequest)WebRequest.Create(Uri);
            request.Headers.Add("Authorization", "GoogleLogin auth=" + this.SecurityToken);
            request.ContentType = "application/x-www-form-urlencoded";
            request.Method = "POST";
            request.Timeout = 5000;

            // build the post string     
            var postString = new StringBuilder();
            postString.AppendFormat("registration_id={0}", recipientId);
            postString.AppendFormat("&data.payload={0}", message);
            postString.AppendFormat("&collapse_key={0}", collapseKey);

            // write the post-string as a byte array     
            var requestData = Encoding.ASCII.GetBytes(postString.ToString());
            request.ContentLength = requestData.Length;
            var requestStream = request.GetRequestStream();
            requestStream.Write(requestData, 0, requestData.Length);
            requestStream.Close();

            // Do the actual request and read the response stream  
            try
            {
                var response = request.GetResponse();
                var responseString = GetResponseString(response);
                response.Close();

                return responseString.Contains("id=") 
                    ? SendStatus.Ok 
                    : GetSendStatusFromResponse(responseString);
            }
            catch (WebException ex)
            {
                var webResponse = (HttpWebResponse)ex.Response;
                if (webResponse != null)
                {

Upvotes: 0

Views: 1075

Answers (1)

Roman Starkov
Roman Starkov

Reputation: 61502

GetRequestStream opens a connection and returns an already-connected stream. Anything you write to the stream goes out on the wire, straight away. It's not buffered up in its entirety first (though some buffering is almost certainly involved).

So it makes sense that it can time out; it just means that a TCP connection could not be established, because that's the point when the connection is set up.

Upvotes: 1

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