From 4ce26d337abb34ed3395430b0216372af741554e Mon Sep 17 00:00:00 2001
From: Til Schmitter <til.schmitter@gmail.com>
Date: Fri, 19 Jun 2026 22:45:37 +0200
Subject: [PATCH] PWA: serviceworker wip

---
 copyparty/httpcli.py |  1 +
 copyparty/web/sw.js  | 45 ++++++++++++++++++++++++++++++++++++--------
 2 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index dfd7616b..d04ea45c 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -336,6 +336,7 @@ class HttpCli(object):
         """returns true if connection can be reused"""
         self.out_headers = {
             "Cache-Control": "no-store, max-age=0",
+            "Service-Worker-Allowed": "/",
         }
 
         if self.args.early_ban and self.is_banned():
diff --git a/copyparty/web/sw.js b/copyparty/web/sw.js
index 5f8b48f3..cdd012c6 100644
--- a/copyparty/web/sw.js
+++ b/copyparty/web/sw.js
@@ -1,10 +1,13 @@
 // service worker. required for PWAs
 // https://www.digitalapplied.com/blog/progressive-web-apps-2026-pwa-performance-guide
 // Register service worker on page load
+console.log('sw.js')
 if ('serviceWorker' in navigator) {
+    console.log('sw load')
     self.addEventListener("fetch", (event) => {
         // Regular requests not related to Web Share Target.
         if (event.request.method !== "POST" || !event.request.action.has("share-target")) {
+            console.log('normal response')
             event.respondWith(fetch(event.request));
             return;
         }
@@ -12,15 +15,41 @@ if ('serviceWorker' in navigator) {
         // Requests related to Web Share Target.
         event.respondWith(
             (async () => {
-            const formData = await event.request.formData();
-            const files = formData.get("files") || "";
-            const responseUrl = '/'; // (ToDo: remember last upload dir)
-            // ToDo: keep file references in clipboard
-            // -> upload on paste
-            event.respondWith(fetch(event.request));
-            alert(files);
-            return;
+                const formData = await event.request.formData();
+                const files = formData.get("files") || "";
+                console.log('sw share:')
+                console.log(files)
+                await addResourcesToCache(files)
+
+                // const responseUrl = '/'; // (ToDo: remember last upload dir)
+                // ToDo: keep file references in clipboard 
+                // (maybe read from cache on page load somehow)
+                // -> upload on paste
+
+                // Copy existing headers
+                const headers = new Headers(event.request.headers);
+
+                // Set a new header
+                var pw = await CookieStore.get('cppwd');
+                headers.set('pw', pw);
+                
+                headers.delete('origin'); // 99% sure this doesn't work, but hey
+
+                const newRequest = new Request(event.request, {
+                    mode: 'cors',
+                    credentials: 'omit',
+                    headers: headers
+                })
+                return fetch(newRequest)
             })(),
         );
     });
+    self.addEventListener('install', (event) => {
+        console.log('sw wait skip')
+        self.skipWaiting(); // insta replace old service workers (helpful for dev)
+    });
+    const addResourcesToCache = async (resources) => {
+        const cache = await caches.open("files");
+        await cache.addAll(resources);
+    };
 }
\ No newline at end of file