cf4f5be7ae
The desktop failed to start in a browser that had cached noVNC 1.6 from the Debian desktop image: its vnc.html, which has no clipboard Clear button, ran the Ubuntu image's 1.3 ui.js, which wires one up and threw "Cannot read properties of null". websockify sends only Last-Modified, so browsers cache noVNC on a guess, and it answers a revalidation with 304 when the file on disk is older than the copy. Serve noVNC through websockify-no-store, which adds Cache-Control: no-store to every response, and from /novnc/ rather than /, so no browser holds a stale copy at the paths the desktop now uses. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
22 lines
780 B
Python
22 lines
780 B
Python
#!/usr/bin/python3
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# websockify, with Cache-Control: no-store on every file it serves. On its own it sends only
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# Last-Modified, so a browser keeps noVNC's files for months on a guess, and answers a revalidation
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# with 304 whenever the file on disk is older than the one cached. When the image's noVNC changes
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# (Debian's 1.6 to Ubuntu's 1.3), a cached page then runs the other version's ui.js and fails as it
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# starts. Over loopback, fetching every file each time costs nothing.
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import sys
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from websockify import websocketproxy
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handler = websocketproxy.ProxyRequestHandler
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end_headers = handler.end_headers
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def no_store(self):
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self.send_header("Cache-Control", "no-store")
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end_headers(self)
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handler.end_headers = no_store
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sys.exit(websocketproxy.websockify_init())
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