Deploying embedded forms using REST

Camunda 7 Topics Discussion & Questions
1

Hello,

I would like to deploy my BPMN process and some embedded forms using REST API and make them run.

For the moment, I succeeded deploying my BPMN file and my form (html file)
Running the process works fine until the task where my embedded form is called.

At that step, I got a message “Form failure: Origin is not allowed by Access-Control-Allow-Origin” in Chrome (and a never-ending loading screen in Firefox)
I suspect that my form is not referenced correctly in my bpmn file.
(Indeed, I got the same message when I try to reference a html file with a dummy name instead of my html name)

I tried referencing my form with

userTask id=“Test_6” name=“Test Embedded form” xmlns:camunda=“http://activiti.org/bpmn” camunda:candidateGroups=“Testers” camunda:formKey=“embedded:app:forms/start-form.html”

and

userTask id=“Test_6” name=“Test Embedded form” xmlns:camunda=“http://activiti.org/bpmn” camunda:candidateGroups=“Testers” camunda:formKey=“embedded:app:start-form.html”

I got the same message error in both occasions.

Here is how my deployment looks like:

deploy.JPG979×283 14.1 KB

Could you help me fgure out what I’m doing wrong ?

1 Like
2

@Francois_Barthelemy

I had similar problem before then I had to use the full path for the path to solve this.

My form is at
src/main/resources/app/forms/start-form.html

Now BPM refers it as
embedded:/app/forms/start-form.html

See if this helps.

3

Just so you know, I picked this up from http://stackoverflow.com/questions/35461715/error-using-embedded-forms-with-camunda-spring-boot

4

Problem is I don’t know the path to use as the form has been uploaded via REST.
I just see that the html form has been deployed next to the BPMN…

5

There’s maybe a link to the folowing issue:
https://app.camunda.com/jira/browse/CAM-5256

The “Origin is not allowed by Access-Control-Allow-Origin” part is a side effect of that bug.
The requests URL starts then with something like “app:” or “embedded:” which is understood as a protocol by the browser which will try a cross origin request aka CORS… for the record.

6

I do not think it is related to the issue @vale references.

The virtual path embedded:app:forms/start-form.html assumes that the file is located in a process application deployed as a WAR file. You say that you deploy the form using the rest api and we can see that in your cockpit screenshot).

In fact resolving a form from the deployment, this is currently a missing feature. I created a feature request for it: https://app.camunda.com/jira/browse/CAM-5632

It would be fairly simple to contribute that. Do you have a working knowledge of Javascript? I could guide you to the necessary changes in tasklist.

7

Unfortunately, I have no good knowledge of Javascript :pensive:

That’s too bad that we can’t automatically deploy embedded forms…

8

Related topic in Google Groups: https://groups.google.com/forum/#!topic/camunda-bpm-users/dMQ-5A1tDKI (But links posted there seem to have changed in the meanwhile).

Anybody by any chance started working on it? I stumbled across this today as well :slight_smile:

9

I created a pull request for this feature: https://github.com/camunda/camunda-bpm-webapp/pull/6

1 Like
10

That’s really great :slightly_smiling:

One last question: how to know in which version it will be available ?

Thanks again for your help…

11

Hi,

it was merged into master with commit eb0f1c06. This commit is already part of 7.5.0-alpha3 released last week. And will therefore be part of the 7.5.0 release end of may. You can also see the fix versions on the Jira Issue.

Cheers,
Sebastian

12

Hi,
I am very new to camunda bpmn, Just i am trying deploy new workflow using create api. But i am getting 405 status.
Below are details, could someone help me on this issue.

Pasted image1364×768 116 KB

13

Hi,

check the URL you are using. Try http://localhost:8080/engine-rest/engine/default/…

regards

Rob

14

Hi,

I have a problem that goes in a similar direction. What does work:

  • Using the REST API in Postman
  • Using camunda-bpm-sdk-js in node console

What does not work:

  • Using the camunda-bpm-sdk-js on a website

When doing this I receive the error message:

XMLHttpRequest cannot load localhost:8080/engine-rest/engine/default/process-definition. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https, chrome-extension-resource.

This seems to be independent of the request’s type. I have included the CORS filter in engine-rest/WEB-INF/web.xml as first filter in the file.

Thanks in advance!

Felix

15

Seems like I included the wrong CORS filter. I now tried this one and it works fine.