GlitchTip / Sentry DSN Path-Prefix Quirk

The Problem

When GlitchTip (Sentry-compatible) is hosted behind an nginx path prefix like /glitchtip/, the Sentry SDK's DSN parser rejects the multi-segment path.

DSN format Sentry expects:

https://<public_key>@<host>/<project_id>

Single path segment only. /1 in the path is the project ID (a number).

What doesn't work:

https://<key>@host/glitchtip/1

The Sentry SDK v10+ DSN parser throws Invalid Sentry Dsn because glitchtip/1 is two path segments, not one.

The Fix

1. Change the DSN in env file

VITE_GLITCHTIP_DSN=https://<key>@host/1

Remove /glitchtip from the DSN path. Keep only the project ID.

2. Add nginx location for bare project-ID paths

The original /glitchtip/ location remains for backward compatibility. Add a new regex location that matches /<digits>/api/ and /digits/store/ and proxies to GlitchTip:

# In the server block:
location /glitchtip/ {
    rewrite ^/glitchtip/[0-9]+/(api/.*)$ /$1 break;
    rewrite ^/glitchtip/[0-9]+/(store/.*)$ /api/1/$1 break;
    rewrite ^/glitchtip/(.*)$ /$1 break;
    proxy_pass http://127.0.0.1:8001;
    proxy_http_version 1.1;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_buffering off;
}

# Bare project-ID path (for Sentry DSN compat)
location ~ ^/([0-9]+)/(api|store)/(.*)$ {
    rewrite ^/([0-9]+)/api/(.*)$ /api/$1/$2 break;
    rewrite ^/([0-9]+)/store/(.*)$ /api/$1/$2 break;
    proxy_pass http://127.0.0.1:8001;
    proxy_http_version 1.1;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_buffering off;
}

3. Rebuild frontend

npm run build
sudo nginx -t && sudo systemctl reload nginx

4. Test

curl -s -o /dev/null -w "%{http_code}" -I "https://your-domain.com/1/api/1/envelope/"

Should return 405 (Method Not Allowed — HEAD on POST-only endpoint) or 400 (valid request reached GlitchTip), not 404.

Verification

Browser console: no Invalid Sentry Dsn error
Sentry SDK initializes: window.__SENTRY__ is defined
Test events reach GlitchTip: check GlitchTip dashboard for new issues

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