Invoke workflow process using Curl command : could not connect to host

[anands48202706]

Hi All,

As examples given in the URL,  https://docs.adobe.com/docs/en/aem/6-0/develop/extending/workflows/wf-extending/wf-rest-api.html

When I tried using the REST URL in our environment,  got could not connect to host error.

For e.g.   Get the list of running workflow

  http://localhost:4502/etc/workflow/instances.RUNNING               (in browser : gives forbidden access)

  Using Curl command:   curl -u admin:admin http://localhost:4502/etc/workflow/instances.RUNNING.json   (gives error as : could not connect to host)

Same for starting a workflow.

My requirement is to start a workflow using the Curl command, but getting could not connect to host error on localhost author instance. Please advice.

Thanks,

Anand

[smacdonald2008]

Instead of trying to get these CURL commands working -- ie:

http://localhost:4502/etc/workflow/instances.RUNNING        

You have much tighter control by writing a custom Sling Servlet in AEM that invokes the workflow using Workflow API: 

https://helpx.adobe.com/experience-manager/using/invoking-experience-manager-workflows-using.html

Then use CURL or another RESTful tool to invoke the AEM Servlet. 

[Sham_HC]

https://helpx.adobe.com/experience-manager/kb/workflow-monitor-via-jmx.html

[anands48202706]

Thanks. That's a good alternative. I can try that. Any reason why Curl command not working directly on workflow instance.

[anands48202706]

smacdonald2008 wrote...

Instead of trying to get these CURL commands working -- ie:

http://localhost:4502/etc/workflow/instances.RUNNING        

You have much tighter control by writing a custom Sling Servlet in AEM that invokes the workflow using Workflow API: 

https://helpx.adobe.com/experience-manager/using/invoking-experience-manager-workflows-using.html

Then use CURL or another RESTful tool to invoke the AEM Servlet. 

Then use CURL or another RESTful tool to invoke the AEM Servlet. 

Need clarification :   Steps;  1- Created workflow process ,

                                2-  creating  custom servlet class which will invoke workflow using workflow API

                                3- Deploy this servlet as bundle in AEM

Question : How this custom servlet class will be exposed as REST URL ?  ( This can be access withing AEM like in any component JSP page, but how do we access this class externally ?)

I want to call this custom servlet URL from external java class as REST URL or curl command.  

Thanks,

Anand

[Jörg_Hoh · Accepted solution]

Hi,

when you get the message "could not connect to host", it's a network problem, as your curl is not able to connect to the remote system. So it's not a problem of AEM. Maybe your browser is configure to use proxy, in that case you need to provide this proxy to curl, too.

kind regards,
Jörg

[smacdonald2008]

"I want to call this custom servlet URL from external java class."

We have a community article that shows invoking a custom AEM Sling Servlet from a Java Swing app (in this app - we post files from the desktop to an AEM Servlet). However - you will see how to do it: 

 https://helpx.adobe.com/experience-manager/using/post_files.html

[smacdonald2008]

I find CURL to be hit and miss. You have better control over using APIs/Restful requests.