Running a Command line tool written in Go on browser with WebAssembly

Last update: Dec 30, 2022

Comments: 1

Running a command line tool written in Go on browser with WebAssembly

This repo contains code/assets from the article

Files:

.
├── article.md           ---  Article explaining the code
├── index.html           ---  Demo UI page
├── worker.js            ---  JS code for Demo UI Page
├── oldindex.html        ---  Code from the article
├── pdfcpu               ---  Linux x86_64 native binary
├── pdfcpu.wasm          ---  Compiled wasm module of pdfcpu
├── pdfcpu.wasm.br       ---  Brotli compression output
├── pdfcpu.wasm.gz       ---  Gzip compression output
├── README.md            ---  This file
├── static_server.js     ---  A simple HTTP static file server in Node.js, with wasm MIME type support for development
├── wasm_exec.js.orig    ---  Original wasm_exec.js from Go v1.12.4 installation (misc/wasm), for diff'ing changes
└── wasm_exec.js         ---  Modified to add Filesystem emulation support in browser with BrowserFS

Owner

wcchoi

https://github.com/wcchoi/go-wasm-pdfcpu/ https://wcchoi.github.io/go-wasm-pdfcpu/

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Comments

panic: syscall/js: call of Value.Int on undefined

[This isn't a problem with pdfcpu - but I'm looking for some guidance :)] Hi, firstly I just wanted to say thank you for all the work here, it's help me get mostly up and running.

I have a golang program that has to Stat the file, and I'm getting a heap of errors like you've described but I can't seem to solve. Specifically it seems to fail with 'panic: syscall/js: call of Value.Int on undefined' and the stack trace points to an error when Go system library trys to read atimeMs, which I think is set by retStat.atimeMs = retStat.atime.getTime();

Have you experience any similar problems? I am trying to debug it but not getting amazingly far.

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Running a Command line tool written in Go on browser with WebAssembly