fix: proxy API via Pages Function to fix iOS Safari guest sessions#22
Merged
pkmaster21 merged 2 commits intomainfrom Apr 16, 2026
Merged
fix: proxy API via Pages Function to fix iOS Safari guest sessions#22pkmaster21 merged 2 commits intomainfrom
pkmaster21 merged 2 commits intomainfrom
Conversation
…est sessions iOS Safari's ITP blocks Set-Cookie headers from cross-origin fetch() requests, even with SameSite=None; Secure, causing guest session tokens to never be stored. Adds a catch-all Pages Function that proxies /api/* to the backend API_URL so all requests are same-origin and cookies are treated as first-party.
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| Preview URL: | https://38a79cf0.tabby.pages.dev |
| Branch Preview URL: | https://fix-ios-safari-guest-session.tabby.pages.dev |
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Problem
Guest sign-in was broken on mobile. After joining a group, navigating to the dashboard immediately showed "Session expired. Open the group link again to rejoin."
The root cause is iOS Safari's Intelligent Tracking Prevention (ITP). When the frontend (
tabby.pages.dev) makes a cross-originfetch()to the API withcredentials: 'include', Safari blocks theSet-Cookieresponse header — even withSameSite=None; Secureset correctly. The guest session token is never stored, so every subsequent API call returns a 401.Solution
Added a Cloudflare Pages Function (
functions/api/[[path]].ts) that proxies all/api/*requests to the backend at the edge. With the proxy in place, the frontend makes same-origin requests totabby.pages.dev/api/..., so cookies are first-party and Safari stores them normally.To complete the fix, update the Cloudflare Pages dashboard:
API_URL= the current value ofVITE_API_URL(the backend URL)VITE_API_URLto an empty string (or remove it)