Purging by regex not working on master

[mac-chaffee]

Hello, thanks for creating this amazing repo!

I noticed that even after #556 was merged into master, I still can't seem to purge keys by regex. I'm using Caddy and Otter on commit 2968d51.

Here is how to reproduce the issue:
Dockerfile:

FROM --platform=$BUILDPLATFORM caddy:builder-alpine AS builder

ENV CGO_ENABLED=0

ARG TARGETOS
ARG TARGETARCH

ENV GOOS=${TARGETOS} GOARCH=${TARGETARCH}

RUN xcaddy build \
    --with github.com/caddy-dns/cloudflare \
    --with github.com/darkweak/souin/plugins/caddy@2968d51eef04b31925352ac4aaf815ea49f4efbd \
    --with github.com/darkweak/storages/otter/caddy

FROM caddy:alpine

COPY --from=builder /usr/bin/caddy /usr/bin/caddy

Caddyfile:

{
  cache {
    ttl 120s
    otter
    api {
      souin
    }
  }
}

localhost {
  cache
  respond "Hello World!"
}

Test purging by regex:

# Store something in the cache
$ curl -ik https://localhost/                                                   
HTTP/2 200 
alt-svc: h3=":443"; ma=2592000
cache-control: 
cache-status: Souin; fwd=uri-miss; stored; key=GET-https-localhost-/
content-type: text/plain; charset=utf-8
server: Caddy
content-length: 12
date: Sun, 20 Oct 2024 13:50:55 GMT

# Observe it's being cached
$ curl -ik https://localhost/souin-api/souin/surrogate_keys
HTTP/2 200 
alt-svc: h3=":443"; ma=2592000
content-type: application/json
server: Caddy
content-length: 592
date: Sun, 20 Oct 2024 13:51:33 GMT

{"GET-https-localhost-/":"\u0004\"M\u0018dp\ufffd\ufffd\u0000\u0000\u0000\ufffd\ufffdHTTP/0.0 200 OK\r\nAlt-Svc: h3=\":443\"; ma=2592000\r\nCache-Control: \r\nContent-Type: text/plain; charset=utf-8\r\nDate: Sun, 20 Oct 2024 13:50:55 GMT\r\nServer: Caddy\r\nX-Souin-Stored-Length: 12\u001b\u0000\ufffd\nTtl: 2m0s\r\n\r\nHello World!","IDX_GET-https-localhost-/":"\nV\n\u0015GET-https-localhost-/\u0012=\n\f\b\ufffd\ufffdԸ\u0006\u0010\ufffd\ufffdԃ\u0003\u0012\n\b\ufffd\ufffdԸ\u0006\u0010\ufffd\ufffd\u0001\u001a\n\b\ufffd\ufffdԸ\u0006\u0010\ufffd\ufffd\u00012\u0015GET-https-localhost-/"}%  

# Try to purge the cache with a regex
$ curl -ik -X PURGE 'https://localhost/souin-api/souin/.+'
HTTP/2 204 
alt-svc: h3=":443"; ma=2592000
server: Caddy
date: Sun, 20 Oct 2024 13:51:48 GMT

# Observe the cache was not purged
$ curl -ik https://localhost/souin-api/souin/surrogate_keys
HTTP/2 200 
alt-svc: h3=":443"; ma=2592000
content-type: application/json
server: Caddy
content-length: 592
date: Sun, 20 Oct 2024 13:51:50 GMT

{"GET-https-localhost-/":"\u0004\"M\u0018dp\ufffd\ufffd\u0000\u0000\u0000\ufffd\ufffdHTTP/0.0 200 OK\r\nAlt-Svc: h3=\":443\"; ma=2592000\r\nCache-Control: \r\nContent-Type: text/plain; charset=utf-8\r\nDate: Sun, 20 Oct 2024 13:50:55 GMT\r\nServer: Caddy\r\nX-Souin-Stored-Length: 12\u001b\u0000\ufffd\nTtl: 2m0s\r\n\r\nHello World!","IDX_GET-https-localhost-/":"\nV\n\u0015GET-https-localhost-/\u0012=\n\f\b\ufffd\ufffdԸ\u0006\u0010\ufffd\ufffdԃ\u0003\u0012\n\b\ufffd\ufffdԸ\u0006\u0010\ufffd\ufffd\u0001\u001a\n\b\ufffd\ufffdԸ\u0006\u0010\ufffd\ufffd\u00012\u0015GET-https-localhost-/"}

Note that curl -ik -X PURGE https://localhost/souin-api/souin/flush works. Maybe the fact that flush directly calls DeleteMany could explain the different behavior, but I'm not sure where the bug is coming from. Hope this info can help!

[darkweak]

Hey @mac-chaffee thank you for this feedback, I'll embark it in the PR #558.

[darkweak]

@mac-chaffee the commit 07d53bf5856586e391da1020e0a59f72dcb52ced should solve your issue:

xcaddy build --with github.com/darkweak/souin/plugins/caddy@07d53bf5856586e391da1020e0a59f72dcb52ced --with github.com/darkweak/souin@07d53bf5856586e391da1020e0a59f72dcb52ced