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twilio
shadow
JavaScript2012–2020
twilio / shadow

shadow

A HTTP debugging proxy that helps you with your continuous deployments

Developer ToolsWeb DevelopmentNetworking
Explore on GitHubRead Hacker News discussions
4Distinct people
4Mentions
0Explicit recommenders
330GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

A HTTP debugging proxy that helps you with your continuous deployments

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year4 dated mentions

Observed mentions: 2012-10-18 17:13:01 UTC to 2020-09-23 03:10:22 UTC.

012012-01-01 00:00:00 UTC to 2013-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments20122013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments20162017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2020

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20122012-01-01 00:00:00 UTC2013-01-01 00:00:00 UTC110
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC000
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC101
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC101
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC000
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC000
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC000
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC000
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC101

What Hacker News says

4 sources
phamilton·Mar 3, 2015
We use POST when we need to because it's an understood solution. I really wish we had a better option. There are so many tools we can't use without modifications. Some examples: Varnish. POST responses do not have cache control of etag or last modified. Nothings stopping you from adding them, but without guarantees no general purpose tool is going to look at them. For our larger datasets, serving from a fast cache is going to make a world of difference. Shadow. https://github.com/twilio/shadow Twilio built this out for their billing system as they migrated to a new platform. It only works with idempotent requests (basically everything but POST). It executes the request on both the new system and the old system and compares the output. The proposed solution here is one I've pondered quite a bit. Making all large queries into two requests w
Read the rest
ould help a lot. The first request is a PUT and returns a URI to a new resource. The second request is a GET. For large queries with significant payloads, two queries that result in a 304 is well worth the cost. The point of a 304 is to reduce data transfer (as well as cost of generating a response). The new resource URI does not need to be stored indefinitely. It's a time sensitive URI. All that said, I haven't gone that route yet. It's too new, too "unique snowflake". The old _method=get approach with a POST is going to be understood by all (even if it makes many people cringe).
In Dropbox starts using POST, and why this is poor API design

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