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Blitzer's Blog >> 72065

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Posted: 05 Sep 2026 14:37 [ permalink ]
Act as an Expert Frontend Engineer and Browser Architecture Specialist.

The Context: I am running a custom LPC Virtual Machine entirely in the
browser. It uses a virtual filesystem (window.__VFS). I need to connect this
VFS to a remote WebSocket DMZ relay to synchronize files across multiple
clients in real-time.

The Tasks:

Update the fs shim: Modify my provided HTML template. Create a WebSocket
connection to ws://localhost:1777. When my LPC engine calls fs.writeFileSync
or fs.unlinkSync on any path starting with mesh/, intercept it and broadcast a
JSON payload to the WebSocket: { type: 'VFS_WRITE', path, data, timestamp } or
VFS_DELETE.

Receive DMZ Updates: Add an event listener to the WebSocket so that incoming
VFS_WRITE messages silently update window.__VFS[path] and print a notification
to the DOM terminal.

Un-stub 08_sockets.js: Rewrite my provided 08_sockets.js so that
socket_connect, socket_send, etc., map directly to native browser WebSocket
objects, allowing my LPC scripts to open their own independent connections to
the outside world.

Please provide the updated fs shim snippet for the HTML file, and the
completely rewritten 08_sockets.js module.

==

$ tree `pwd`
 build_web.ini
 build_web.ini~
 build_web.js
 clientlib -> ../GDC3/clientlib/
 core
B B codegen.js
B B lexer.js
B B parser.js
B B preprocessor.js
B B runtime.js
 core_dump.js
 DMZ_RELAY
B B dmz_relay.js
B B mesh_archive.jsonl
B B node_modules
B B BB ws
B B B B BB browser.js
B B B B BB index.js
B B B B BB lib
B B B B B BBB buffer-util.js
B B B B B BBB constants.js
B B B B B BBB event-target.js
B B B B B BBB extension.js
B B B B B BBB limiter.js
B B B B B BBB permessage-deflate.js
B B B B B BBB receiver.js
B B B B B BBB sender.js
B B B B B BBB stream.js
B B B B B BBB subprotocol.js
B B B B B BBB validation.js
B B B B B BBB websocket.js
B B B B B BBB websocket-server.js
B B B B BB LICENSE
B B B B BB package.json
B B B B BB README.md
B B B B BB wrapper.mjs
B B package.json
B B package-lock.json
 dmz_relay_cfg.json
 efuns.d
B B 01_math.js
B B 02_strings.js
B B 03_system.js
B B 04_fs.js
B B 05_game.js
B B 06_sscanf.js
B B 07_types.js
B B 08_sockets.js
B B 09_simul_efuns.js
B B 10_mesh.js
 efuns.js
 ext -> ../GDC/ext
 gamelib -> ../GDC3/gamelib/
 gd
 gd_parser.c
 harness.js
 index.html
 index.html~
 Makefile
 package.json
 template.html
 template.html~
 test-results-baseline
B B tests_call_out.c.txt
B B tests_catch.c.txt
B B tests_clone_object.c.txt
B B tests_define.c.txt
B B tests_file.c.txt
B B tests_math.c.txt
B B tests_rambuffer.c.txt
B B tests_string.c.txt
 test-results-latest
B B tests_call_out.c.txt
B B tests_catch.c.txt
B B tests_clone_object.c.txt
B B tests_define.c.txt
B B tests_file.c.txt
B B tests_math.c.txt
B B tests_rambuffer.c.txt
B B tests_string.c.txt
 test_runner.js
 tests -> ../GDC/tess
 tests.ini

13 directories, 71 files
$B

==[ Chromium ]==
http://localhost:7070/

Type 'help' for a list of commands.
--- LPC WEBASSEMBLY VM BOOTED ---
Available commands:
B helpB B B B B - Show this message
B timeB B B B B - Display system time
B md5 <string>B - Hash a string
B eval <lpc>B B - Evaluate LPC expression dynamically
B clearB B B B B- Clear the screen (handled by frontend)
time
System uptime: 0 seconds
Current time: Sat Sep 05 2026 11:34:52 GMT+0000 (Coordinated Universal Time)
eval 1+2
Result: 3

==

Thank you