This site uses different types of cookies, including analytics and functional cookies (its own and from other sites). To change your cookie settings or find out more, click here. If you continue browsing our website, you accept these cookies.

Learn more
I AGREE
community Data Science Portal alteryx .com community Data Science Portal alteryx .com community
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 

Dev Space

Customize & extend the power of Alteryx. SDKs, APIs, custom tools, and more!
It's the most wonderful time of the year - Santalytics 2020 is here! This year, Santa's workshop needs the help of the Alteryx Community to help get back on track, so head over to the Group Hub for all the info to get started!
SOLVED

HTML/Javascript plugin - how to send a synchronous request

Highlighted
DavidVk
Alteryx
Alteryx
‎03-26-2017 07:23 AM

There is something wrong with this code

 

Alteryx.Plugin.II_PushRecords = function (data) {
    Alteryx.Engine.SendMessage.Warning("Before request");
    $.ajax({
        url: 'https://v1-17-1-4.semanta.cloud/x/admin/cleanstage',
        type: "GET",
        async:false,
        data: {
            loadCode: 'xxx',
            username:'admin',
            password:'somepassword'
        },
        success: function () {
            Alteryx.Engine.SendMessage.Warning("success");
        },
        error: function () {
            Alteryx.Engine.SendMessage.Warning("error");
        }
    });
    Alteryx.Engine.SendMessage.Warning("After request");

    Alteryx.Engine.SendMessage.PushRecords("T2", data.Records);
};

It is a part of a plugin that has one input and one output. I want the output to be exactly the same as the input, but as a side-effect, I want to synchronously (i.e. with blocking) call a web service. On running this, I get the following error message

 

Error: Designer x64: The Designer x64 reported: InboundNamedPipe::ReadFile:  The pipe has been ended.

the web service is not called (I can check on the server, but also I see very little going on in Fiddler).

 

A few points

  1. when I remove the request, passing the data through the tool works fine. Output is input, no problem there.
  2. when I make the request asynchronous, the tool will interrupt when it has finished processing
  3. the request actually works, I can run the jquery code (replacing the SendMessage by an alert) in Chrome if I start it with same origin policy disabled
  4. I do have $.ajax, if the server is http and not https and I set async:true, I can observe that the request occasionally makes it before the tool kills it

Thanks a lot !

Reply
0 Likes

Accepted SolutionSolved! Go to Solution.

DavidVk
Alteryx
Alteryx
‎03-31-2017 10:11 AM 
        success: function () {
            Alteryx.Engine.SendMessage.Warning("success");
            Alteryx.Engine.SendMessage.PushRecords("T2", data.Records);
 Alteryx.Engine.SendMessage.CloseOutput(Alteryx.Plugin.DefineConnections().OutgoingConnections[0].name);
 Alteryx.Engine.SendMessage.Complete();

        },
        error: function () {
            Alteryx.Engine.SendMessage.Warning("error");
            Alteryx.Engine.SendMessage.PushRecords("T2", data.Records);
 Alteryx.Engine.SendMessage.CloseOutput(Alteryx.Plugin.DefineConnections().OutgoingConnections[0].name);
 Alteryx.Engine.SendMessage.Complete();

        }

The key here is to put all the  finalization code into the callbacks ! That includes the PushRecords that I wrongly called at the end of the method and also the code that is usually in the Alteryx.Plugin.II_AllClosed method. 

 

All hail JP Kabler for the much needed hint.

Reply