karma-runner/karma

Allow regular expressions in proxies definition

Open

#1930 opened on Feb 25, 2016

View on GitHub
 (2 comments) (6 reactions) (0 assignees)JavaScript (11,918 stars) (1,703 forks)batch import
discusshelp wantedtype: feature

Description

Wished behavior

I would like to be able to tell Karma to serve a file whatever the sub-path is. I could also want to transform the URL to something completely different. For instance, something like this (but it won't work with the object syntax):

proxies: {
    /\/images\/.*/: "/base/test/assets/placeholder.png",
    /\/books/(\d+)\/pages\/(\d+)/: "http://external.host/get_book_page.php?book_id=$1&page_id=$2"
}

Proposed syntax

proxies could accept an object, as it is currently the case, or an array of arrays, which is still readable, and accepts regular expressions as "keys":

proxies: [
    [/\/images\/.*/, "/base/test/assets/placeholder.png"],
    [/\/books/(\d+)\/pages\/(\d+)/, "http://external.host/get_book_page.php?book_id=$1&page_id=$2"]
]

Contributor guide

Tech stack
javascriptnodejs
Domain
testingbackend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
JavaScriptKarma configuration
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the current proxy implementation in Karma (likely in lib/proxy.js or similar). Review the proposed array of arrays syntax for regex support. Check if there is any existing discussion or PR addressing this. Consider backward compatibility with the existing object syntax.