Do you have a topic to notifyon success/failure and an email subscription on that topic for the FME Server workbench?

No, I've tried it but the subscription send an email only if I specify the email in it. With this solution the opt_requesteremail is ignored... It don't send a meil to it. I'd like to be dynamic and send the link for the download at the requester: is an user of our administration.

In the email log I have this warning: Skipped sending email for subscription "DataDownload_Email_JobSuccess". No recipients were specified in subscription configuration or notification message.

I think I found the problem... I was sending a sync data download... With the async works.

UPDATE:Now the request is ok but when I send the call to the server the response is made in html... no json response. I've tried a lot of solution but I always an html response. If I use Advanced REST Client with same parameters works and I have a json response... If I use same parameters on httpcaller I have a html response.

Did you try setting the Accept header to application/json ?

Yes, in the header I have Authorization and Accept application/json, in the body a attribute with the parameters and the content-type to application/x-www-form-urlencoded .

I've tested the difference between httpcaller and ARC and the only difference is the useragent that in the httpcaller is set to FME...

The strange thing is that if I made my request by ARC all works perfectly and the mail notification come to my email box. If I run my httpcaller to do the datadownload the operation works but no mail come in my inbox with the link.

I create a workaround at the problem of the HTTPCaller request to the datadownload service: a python caller that do the request and work perfectly.

I don't understand why the same post request made with the httpcaller return a html response and don't send an email to the requester (async mode) but with curl return the json string and the email is delivered.

You can also specify the format with "opt_responseformat=json".

See: https://docs.safe.com/fme/html/FME_Server_Documentation/ReferenceManual/service_datastreaming.htm

Yes, thanks. I've tried a lot of configurations but nothing worked as expected.

Did you try the HTTPCaller to do what I try to do? Work by you?

Which URL are you using? There are two APIs:

https://docs.safe.com/fme/html/FME_REST/apidoc/v3/index.html#!/transformations/submit_post_29

and

https://docs.safe.com/fme/html/FME_Server_Documentation/ReferenceManual/service_datadownload.htm

The parameters are different.

I tried the HTTPCaller with the datadownload service which worked perfectly.

I'm using this url:

https://docs.safe.com/fme/html/FME_Server_Documentation/ReferenceManual/service_datadownload.htm