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Drop gif + png, and redirect png to raster.shields.io (#3644)

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1. Remove rasterization support from the server. This responsibility is delegated to a raster server which proxies the SVG badges and renders them.
2. When a raster server URL is configured, 301 redirect all .png badges to the identical URL on the raster server.
    `https://img.shields.io/npm/v/express.png?style=flat-square` ↪️`https://raster.shields.io/npm/v/express.png?style=flat-square`
3. For configured redirects, redirect to the canonical URL on the raster server.
    `https://img.shields.io/vso/build/totodem/8cf3ec0e-d0c2-4fcd-8206-ad204f254a96/2.png?style=flat-square`
    ↪️`https://img.shields.io/azure-devops/build/totodem/8cf3ec0e-d0c2-4fcd-8206-ad204f254a96/2.png?style=flat-square`
4. Redirect the "legacy badge old version" to the appropriate URL on the raster server.
5. When no raster server is configured (e.g. PRs), render an SVG containing **404 | raster badges not available** for all `.png` badges. (Note that the raster server can be self-hosted; however, this is deferred to a later PR.)
5. Drop support for jpg and gif which are very infrequently used (see #3112). Render an SVG containing **410 | jpg no longer available**.
7. ~~Remove raster dependencies.~~ Remove the raster cache (which is only used in the CLI, and therefore pointless).
8. Move the LRUCache code out of the npm package.
8. A wee bit of refactoring in `server.js`.

Ref #3112
Close #3631
This commit is contained in:
Paul Melnikow
2019-07-06 16:41:46 -04:00
committed by GitHub
parent c6ef885b75
commit 66c7f13e38
21 changed files with 165 additions and 153 deletions
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@@ -1,7 +1,5 @@
FROM node:8-alpine
RUN apk add --no-cache gettext imagemagick librsvg git
RUN mkdir -p /usr/src/app
RUN mkdir /usr/src/app/private
WORKDIR /usr/src/app