Data Download service redirects HTTP POST requests to HTTP GET

Hi @ngoorman! One of our colleagues suggested it should be possible to use POST with ContentType x-www-form-urlencoded. Have you tried if that works for you?

Hi @alyssaatsafe - I've just tried again and it does not make a difference. I constructed the headers as follows (it's a Python script):

'Content-Type' :'application/x-www-form-urlencoded',

'Accept' : 'application/x-www-form-urlencoded',

'Authorization' : 'fmetoken token={0}'.format(_fme_token)

Oh and the CORS settings allow POST, and allow these three headers (they are the default settings). I've tried setting 'Supports Credentials' to True, but this did not make any difference either.

Hi @richardatsafe,

Very useful, thank you. I've installed Postman and recreated the request there (URL, body and headers). When I send it, FME Server works perfectly and accepts the parameters in the body.

When I then copy the code that Postman has generated for Python 3, and save that to a .py file and run it with Python 3, it does not work - I get the same behaviour as before where the body is ignored. The same happens when I tweak the code to work in Python 2.7 and run that way.

I have no idea what's going on though I'm happy to have confirmed that FME Server accepts the right request without issue. Python seems to do something to it that FME Server doesn't like - but even when I cut down the payload to just 'opt_responseformat=json' it doesn't work (getting HTML response instead).

I've now put the most basic request into Postman, against an FME sample server. Same behaviour: works fine in Postman, stops working in Python with the exported code:

import requests

url = "https://demos-safe-software.fmecloud.com/fmedatadownload/Samples/austinDownload.fmw"

payload = 'opt_responseformat=json'

headers = {

  'Content-Type': 'x-www-form-urlencoded',

  'Authorization': 'fmetoken token=568c604bc1f235bbe137c514e7c61a8436043070',

  'Accept': 'application/json'

}

response = requests.request("POST", url, headers=headers, data = payload)

print(response.text.encode('utf8'))

Hi @ngoorman,

I had success with my python but similar to postman I had to turn off the verify ssl certificate.  (verify=False)

import requests

url = "https://MyFMEServer/fmedatadownload/repository/WKT2.fmw"

payload = 'WKT=POINT%20%28-123.09875267568009%2049.25721245106853%29%20

headers = {

  'Authorization': 'Basic YWStbW46YWRtaW4=',

  'Content-Type': 'application/x-www-form-urlencoded'

}

response = requests.request("POST", url, verify=False, headers=headers, data = payload)

print(response.text.encode('utf8'))

Hi @richardatsafe,

I've got it working now - thank you for your help. What did it was using 

'Content-Type': 'application/x-www-form-urlencoded' 

rather than

'Content-Type': 'x-www-form-urlencoded' 

The latter works in Postman but not in Python. Changing that one thing solved it - thanks again.