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harness: add /screen page and /screen/ws WebSocket VNC relay

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Reads /etc/hyperhive/gui.json at startup to get the VNC port written
by the weston-vnc ExecStart script (issue #50). Adds:
- gui_vnc_port: Option<u16> on AppState
- gui_enabled: bool on StateSnapshot (for issue #52 screen link)
- GET /screen: serves a minimal RFB-over-WebSocket viewer (screen.html)
- GET /screen/ws: upgrades to WebSocket and byte-pumps to 127.0.0.1:<vnc_port>

The relay is a pure two-task byte pump (WS→TCP and TCP→WS), transparent
to any RFB variant including VeNCrypt. Returns 404 when gui is not
enabled.

screen.html is a self-contained RFB client: handshake, FramebufferUpdate
(Raw encoding), pointer and keyboard forwarding — enough to display the
desktop and interact with it. noVNC assets (issue #52) replace this.

Closes #51
This commit is contained in:
iris 2026-05-20 14:24:05 +02:00 • committed by Mara
parent 29df223650
commit 2027e94432
5 changed files with 651 additions and 1 deletions
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206
Cargo.lock generated
View file

@ -106,6 +106,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -124,8 +125,10 @@ dependencies = [
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@ -249,6 +267,25 @@ version = "0.8.7"
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@ -420,6 +473,28 @@ dependencies = [
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@ -451,6 +526,7 @@ dependencies = [
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