1377542 - Add ETag/I-M-S headers support to blocklist.xml endpoint

Status: RESOLVED FIXED

(Cloud Services :: Server: Remote Settings, enhancement)

Description

[Mathieu Leplatre [:leplatrem]]

We want the server to return a 304 when nothing changed since the timestamp specified in headers.

Note: this has to be implemented in kinto-amo plugin: https://github.com/mozilla-services/kinto-amo/issues/21

Comment 1

[Mathieu Leplatre [:leplatrem]]

This is solved:

Headers contain ETag and Last-Modified info:

    $ http HEAD https://firefox.settings.services.mozilla.com/v1/blocklist/3/%7Bec8030f7-c20a-464f-9b0e-13a3a9e97384%7D/46.0/

    HTTP/1.1 200 OK
    Access-Control-Expose-Headers: Alert, Backoff, Content-Length, Retry-After
    Age: 15
    Connection: keep-alive
    Content-Length: 272645
    Content-Type: application/xml;charset=UTF-8
    Date: Fri, 14 Jul 2017 10:51:08 GMT
    ETag: "1483471392954"
    Last-Modified: Tue, 03 Jan 2017 19:23:12 GMT
    Via: 1.1 b1ad12e40925f327a5ca94675f072b12.cloudfront.net (CloudFront)
    X-Amz-Cf-Id: Ivtb07phcPNguI5OVTQtTHAmdWAbVrDHGtyw-32lNvdvrSP_NPll5A==
    X-Cache: Hit from cloudfront
    X-Content-Type-Options: nosniff

A 304 response is returned when nothing changed:

    $ http HEAD https://firefox.settings.services.mozilla.com/v1/blocklist/3/%7Bec8030f7-c20a-464f-9b0e-13a3a9e97384%7D/46.0/ 'If-None-Match:"1483471392954"'
    
    HTTP/1.1 304 Not Modified
    Access-Control-Expose-Headers: Alert, Backoff, Content-Length, Retry-After
    Connection: keep-alive
    Date: Fri, 14 Jul 2017 10:52:16 GMT
    ETag: "1483471392954"
    Last-Modified: Tue, 03 Jan 2017 19:23:12 GMT
    Via: 1.1 1b0e2c12e43b797479be5ac44b57db2c.cloudfront.net (CloudFront)
    X-Amz-Cf-Id: RIou1114GQW2Bd_R7xca6n5UQ48GPhcVbcdTmGEaIig9WqWLjFswpg==
    X-Cache: Miss from cloudfront
    X-Content-Type-Options: nosniff