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Dynamics 365 Community / Forums / Microsoft Dynamics 365 | Integration, Dataverse... / Plugin REST API integr...
Microsoft Dynamics 365 | Integration, Dataverse...
Suggested answer

Plugin REST API integration/Call

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Posted on by Community Member Microsoft Employee

Hi guys, 

I have a bit of a weird problem here. 

Scenario:

I need to make Calls to an external REST API from inside Dynamics 365 online. Wrote a test console app and I am able to make all the necessary calls to the external REST API.

The moment I make that a Plugin and register on D365, nothing works.

I get the below error:

“A Web exception occurred while attempting to issue the request. Unable to connect to the remote server”

I contacted the third party and they confirmed that the port they are using is port 443.

Any ideas?

  • a33ik Profile Picture
    a33ik 84,325 Most Valuable Professional on at
    RE: Plugin REST API integration/Call

    Hello,

    I would recommend to get in touch with API provider and ask if there is a need to whitelist IP addresses of Dynamics because the call to their API comes from it.

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Plugin REST API integration/Call

    Thanks for this, appreciated. 

    There clearly is something totally wrong here. I used HttpWebRequest/HttpWebResponse (In console) works perfectly. deploy plugin, still getting my initial error "Unable to connect to remote server"

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://apiXXXXXX.com/.../00");
request.ContentType = "application/json";
request.Method = "GET";
request.Timeout = 500000;

request.Headers.Add("Authorization", "Bearer Token Value");
var response = (HttpWebResponse)request.GetResponse();
string content = string.Empty;
using (var stream = response.GetResponseStream())
{
	using (var sr = new StreamReader(stream))
	{
		content = sr.ReadToEnd();
	}
}
tracer.Trace("Response : "   content);

  • Suggested answer
    a33ik Profile Picture
    a33ik 84,325 Most Valuable Professional on at
    RE: Plugin REST API integration/Call

    No worries, I fixed the formatting.

    I remember having similar issues when I used WebClient. Check this post - stackoverflow.com/.../call-external-api-from-microsoft-dynamics-365-online

    I remember that using of HttpWebRequest/HttpWebResponse fixed the issue.

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Plugin REST API integration/Call

    Apologies, Tried formatting the code snippet, didn't win.

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Plugin REST API integration/Call

    try 
{
	using (WebClient client = new WebClient()) 
	{
		client.Headers.Add("Authorization", "Bearer Token Value");
		client.Headers.Add(HttpRequestHeader.ContentType, "application/json");
		byte[] responseBytes = client.DownloadData("">api-XXXXXXXX.com/.../00");
		string response = Encoding.UTF8.GetString(responseBytes);
		tracer.Trace("Response : "   response); 
	}
} 
catch (WebException exception) 
{ 
	string str = string.Empty; 
	if (exception.Response != null) 
	{ 
		using (StreamReader reader = new StreamReader(exception.Response.GetResponseStream())) 
		{ 
			str = reader.ReadToEnd(); 
		} 
		exception.Response.Close(); 
	} 

	if (exception.Status == WebExceptionStatus.Timeout) 
	{ 
		throw new InvalidPluginExecutionException( "The timeout elapsed while attempting to issue the request.", exception); 
	}

	throw new InvalidPluginExecutionException(String.Format(CultureInfo.InvariantCulture, "A Web exception occurred while attempting to issue the request. {0}: {1}", exception.Message, str), exception); 
}

  • a33ik Profile Picture
    a33ik 84,325 Most Valuable Professional on at
    RE: Plugin REST API integration/Call

    Hello,

    Can you please provide the code you use?

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