C Native Messaging host

Installation and usage on Chrome and Chromium

1. Navigate to chrome://extensions.
2. Toggle Developer mode.
3. Click Load unpacked.
4. Select native-messaging-c folder.
5. Note the generated extension ID.
6. Compile with clang nm_c.c -o nm_c or gcc nm_c.c -o nm_c.
7. Open nm_c.json in a text editor, set "path" to absolute path of nm_c and chrome-extension://<ID>/ using ID from 5 in "allowed_origins" array.
8. Copy the nm_c.json file to Chrome or Chromium configuration folder, e.g., Chromium on *nix ~/.config/chromium/NativeMessagingHosts; Chrome dev channel on *nix ~/.config/google-chrome-unstable/NativeMessagingHosts.
9. To test click service worker link in panel of unpacked extension which is DevTools for background.js in MV3 ServiceWorker, observe echo'ed message from Node.js Native Messaging host. To disconnect run port.disconnect().

The Native Messaging host echoes back the message passed.

For differences between OS and browser implementations see Chrome incompatibilities.

License

Do What the Fuck You Want to Public License WTFPLv2