dev/viewership-metrics: Probe every redirect rule on the live site - #1897
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…ents and Cloudflare traffic probe-redirects.mjs requests each rule's source, follows the chain like a browser, records every hop, the final status, whether the first redirect matches the rule, and whether the fragment the user ends up with exists on the page. Joins page-views-by-path.md rows for source, destination and final page. Summary groups live rules by source/destination fragment case. Rule loading moves to redirect-rules.mjs, shared with page-views-report. Amp-Thread-ID: https://ampcode.com/threads/T-01a08968-179e-7528-9162-44dd0fbb964d Co-authored-by: Amp <amp@ampcode.com>
…404s; probe summary adds traffic by status and rule alignment Amp-Thread-ID: https://ampcode.com/threads/T-01a08968-179e-7528-9162-44dd0fbb964d Co-authored-by: Amp <amp@ampcode.com>
…ce-fragment rule never counts as firing
…atch fires), add sitemap source/destination, resolve destination constants Co-authored-by: Amp <amp@ampcode.com> Amp-Thread-ID: https://ampcode.com/threads/T-01a08968-179e-7528-9162-44dd0fbb964d
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…ing duplicates zero it Co-authored-by: Amp <amp@ampcode.com> Amp-Thread-ID: https://ampcode.com/threads/T-01a08968-179e-7528-9162-44dd0fbb964d
…itemap source/destination columns Co-authored-by: Amp <amp@ampcode.com> Amp-Thread-ID: https://ampcode.com/threads/T-01a08968-179e-7528-9162-44dd0fbb964d
…e other keys Co-authored-by: Amp <amp@ampcode.com> Amp-Thread-ID: https://ampcode.com/threads/T-01a08968-179e-7528-9162-44dd0fbb964d
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Stacked on #1890.
npm run probe-redirectsrequests every rule insrc/data/redirects.tson sourcegraph.com, follows the redirects like a browser, and writesviewership-metrics/reports/redirect-probe.json: per rule, every hop, final URL/status, whether the first redirect is the one the rule promises, whether the#fragmentthe user ends up with exists on the page, and the Cloudflare rows for source, destination and final page.Headline numbers from the first run (962 live rules):
/graphbook*→sourcegraph.com/handbookredirects to itself;/@v5.3.0/admin/observability/*ping-pongs withdocs.sourcegraph.com)#fragmentin the source. Browsers never send fragments, so none of them can match as written; 200 fall through to a bare-path rule, 30 to the page itself#fragmentin the destination; the anchor exists on the final page for 9See
viewership-metrics/README.md→ Redirect probe for the field meanings.