Update ticket using REST

[Elwynn Martin]

I'm trying to port the java example for updating an incident to C Sharp using HTTPWebRequest and Response to make the calls and handle the returns. I'm currently getting a 400 "Bad Request" error using the code below, can someone explain what I need to change for it to work correctly?

The write doesn't seem to throw any errors, the code where it fails is the first line within the if (put.HaveResponse){.....} 

 

     private static void restPut(string accessKey)
        {
            
            
        try
        {            
         //////////////////////////////////////////////////////
        // PUT OPERATION -- Update an existing Incident ticket
        //////////////////////////////////////////////////////
        string url = "https://servername:8050/caisd-rest";
        string endpointPUT = url + "/in/400001";

        
            string postBody = @"<in>" + "<summary>Updated from REST API Java Samples code</summary>" + "</in>";
            byte[] dataByte = Encoding.ASCII.GetBytes(postBody);
        
        
        //PutMethod put = new PutMethod(endpointPUT);
       HttpWebRequest put = (HttpWebRequest)WebRequest.Create(endpointPUT);
        put.Method = "PUT";
        put.Headers.Add("X-AccessKey", accessKey);
        put.Accept = "application/json";
        put.ContentType = "application/xml; charset=UTF-8";
        //set the length of message body, it defaults to -1 meaning no data to send
        put.ContentLength = dataByte.Length;     
           
          // Get the request stream
          Stream PUTstream =  put.GetRequestStream();
                // Write the data bytes in the request stream
          PUTstream.Write(dataByte, 0, dataByte.Length);
   
        if (put.HaveResponse) {
            
            HttpWebResponse PUTResponse = (HttpWebResponse)put.GetResponse();
            StreamReader reader = new StreamReader(PUTResponse.GetResponseStream(), false);
   
            //responseString is the full responseString
            string response = reader.ReadToEnd().ToString();
            
        } else {
                    Console.WriteLine("invalid response");
        }
        
        


          //  PUTstream.Close();
        }
        catch (WebException e)
        {
            Console.WriteLine(e.ToString());
            Console.Write(e.StackTrace);
        }
        catch (IOException e)
        {
            Console.WriteLine(e.ToString());
            Console.Write(e.StackTrace);
        }
        finally
        {
            //release system resources here
        }

[Elwynn Martin]

I figured out that the 400 error was caused by required fields I wasn't accounting for in my request.

 

I posted a working example below of using a put request to update a request in case some one else wants to use C# to call rest in the future.

try
{
//////////////////////////////////////////////////////
// PUT OPERATION -- Update an existing Incident ticket
//////////////////////////////////////////////////////
string url = "https://servername:8050/caisd-rest";
string endpointPUT = url + "/cr/401552";

 

//create the body of the put request
string postBody = @"<cr>" +"<description>Updated from REST API Java Samples code</description>" +
"<summary>Updated from REST API Java Samples code</summary>" + "</cr>";

 

//encode it into bytes
byte[] dataByte = Encoding.ASCII.GetBytes(postBody);

 

//Create an HttpWebRequest and set the headers
HttpWebRequest put = (HttpWebRequest)WebRequest.Create(endpointPUT);
put.Method = "PUT";
put.Headers.Add("X-AccessKey", accessKey);

 

//set the accept property to return json. Accept is easier to use with HttpWebRequest than WebRequest
put.Accept = "application/json";
put.ContentType = "application/xml; charset=UTF-8";

 

//set the length of message body, it defaults to -1 meaning no data to send
put.ContentLength = dataByte.Length;

// Get a request stream to use to write data to the resource
Stream PUTstream = put.GetRequestStream();

 

// Write the byte data in the request stream to the resource
PUTstream.Write(dataByte, 0, dataByte.Length);

 

// Get the response back from the resource
HttpWebResponse PUTResponse = (HttpWebResponse)put.GetResponse();

//use a stream reader to get the response stream from the HttpWebResponse object
StreamReader reader = new StreamReader(PUTResponse.GetResponseStream(), false);

//response is the full response string converted to string
string response = reader.ReadToEnd().ToString();

 

//verify the response
Console.WriteLine(response);
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
}
finally
{
//release system resources here
}

}

[Maheshwar Kusuma]

Thanks for posting a working example Elwynn!

 

Definitely will help other members in communities!