PATCH request

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I'm writing a plug-in to send a PATCH request to the REST API whenever a new opportunity is created. But I keep getting the same error "400 Bad Request". However, I tested the URL in POSTMAN and it works fine. This is my code (the plug-in will call this method):

private async void MakeRequest(string requestUrl, ITracingService tracingService)
        {
            try
            {
                HttpClient client = new HttpClient();

                client.BaseAddress = new Uri(requestUrl);
                client.DefaultRequestHeaders
                    .Accept
                    .Add(new MediaTypeWithQualityHeaderValue("application/json"));

                client.DefaultRequestHeaders.TryAddWithoutValidation("Ocp-Apim-Subscription-Key", subscriptionKey);

                HttpRequestMessage request = new HttpRequestMessage(new HttpMethod("PATCH"), "relativeAddress");
                request.Content = new StringContent("{\"name\":\"John Doe\",\"path\":\"prescriptive-actions/status\",\"value\":\"Completed\",\"from\":\"New\"}", Encoding.UTF8, "application/json");

                var task = client.SendAsync(request)
                    .ContinueWith(responseTask =>
                    {
                        tracingService.Trace("responseTask {0}", responseTask.Result);
                    });

                task.Wait();
            }
            catch (Exception ex)
            {
                tracingService.Trace("PROSPluginNotifyPAO Error: {0}", ex.ToString());
                throw;
            }
        }

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Bas van de Sande 4,383 on at

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Hi

the first thing that crosses my mind is that you need to specify some additional headers in which you indicate that it is a json call.

I assume you verified the incoming requesturl. is it a valid url (crm sandbox does not allow calling ip addresses directly)?

are you running an onpremise crm or crm online? In case you are running on premise, have you verified (by using remote desktop) on the server that you can reach the destination url?

Looking forward to hear from you

Bas

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Community Member on at

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Hi,

Thanks for your response.

I already added "new MediaTypeWithQualityHeaderValue("application/json")". Isn't this sufficient?

Yes, it's a valid URL. The URL is something like prospaodev.azure-api.net/.../678391. It's not an IP address.

This is CRM Online 2015.

Hope to hear back from you.

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Verified answer

Bas van de Sande 4,383 on at

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Hi

I would try to rewrite your code like this. These are the headers I usually send. (I took it from an example on my blog --> http://journeyintocrm.com/archives/1209)

Furthermore, what you can do to debug is to write a simple console app, in which you test the communication part. Once that works, you can implement it in the plugin. Keep in mind that on CRM online your code runs in a sandbox. Some of the Microsoft namespaces (like System.Web.Extensions) give strange errors.

I would advise you in the first place, to test the communications in a standalone console app.

Please let me know if I can help

Bas

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