Iglu webhook response code


Hey All,
Slightly strange error and wanted to check my understanding, currently using cloud front collector and iglu webhook, although my schema is validated and i can process the data correctly i am getting a 403 each time I make a get request to the adapter. This currently works fine but about to integrate with a 3rd party that will not repost info if they get to many 403’s, guessing i have some settings wrong in my cloud front but unsure where?
Many thanks


Could you possibly post the URL and payload for the request that you are getting a 403 for?


Hi @mike, the get request starts with

and the response is

<?xml version="1.0" encoding="UTF-8"?>
    <Message>Access Denied</Message>

have also tried http and including /i/ in the request
Any thoughts are welcome


Hi @fwahlqvist, this error is typically generated when Amazon attempts to serve a key from S3 that doesn’t exist (in this case the com.snowplowanalytics.iglu/* asset). I’m not sure if this will work but there’s an issue on the Github repo describing this here.

Has anyone has tried uploading a duplicate pixel cp /i /com.snowplowanalytics.iglu/v1 with that path and testing it to see if it works? (cc @alex).


Hey Mike,
After some small experimentation this is my findings if anyone else get the same issue

Cloudfront logs whatever you request, as the default setup is to serve a pixel on “/i” that is the only uri by default that will give you a 200, with that the uri would look like this

‘’’ “http://xxxxxx.cloudfront.net/i?schema=…”

However this does not work with Snowplow’s ETL process for enrichment.

If you add in a the “com.snowplowanalytics.iglu/v1/” and puts a pixel in the folder the ETL process will still show this as error as the collector URI is wrong, the uri would look like this

‘’’ “http://xxxxx.cloudfront.net/com.snowplowanalytics.iglu/v1?schema…”

Using the correct uri looking like this

‘’’ “http://xxxxxx.cloudfront.net/com.snowplowanalytics.iglu/v1?schema…”

the ETL enrichment workshowever you will get a 403 on each request and thats not ideal

The 3 theoretical options I can see is

A) Amend snowplow ETL process to work with I pixel (either in root folder or subfolders).
B) In AWS change the setup so a pixel will be served from the subfolder “com.snowplowanalytics.iglu/v1/” even when calling subfolder root
C) In AWS see if its possible to change the default behaviour to respond with a 200 on “com.snowplowanalytics.iglu/v1/”

A last alternative is to de-scope the iglu web hook and say its not compatible with cloudfront collector.

@mike and @alex would be great if you could add any builds, comments or thoughts



Hi Fred,

I didn’t quite understand this:

I think you want to create a folder called com.snowplowanalytics.iglu and then put a pixel in that folder called v1 - is that what you did? I can’t see why a curl on the command line to that path would give a 403…


Alex, rereading what you said this is not what I did, will test now


Hi @Alex,
have amended as suggested and works fine, might I suggest that the documentation is updated on the cloudfront collector to set up a second pixel for web hooks, i.e.
/I for the trackers but
/v2 if you need the igly webhook’s
many thanks for replay from you @alex and @mike


Great idea @fwahlqvist - ticket created: