how to retrieve files generated by a wasm program?

[Shi Yan]

I created a wasm program with a preloaded folder /asset

the program, upon finish, will generate a file log.txt under /asset/log.txt.

How can I get this file?

I run the program with node.js. It runs fine, but I don't know where to get the result file back. Thanks

[Mehdi Sabwat]

Hi, I think you can use nodefs. Here's a test : https://github.com/emscripten-core/emscripten/blob/master/tests/fs/test_nodefs_rw.c

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[Alon Zakai]

Another option is to use the JS FS API to access the in-memory filesystem. Here is readFile for example:

https://emscripten.org/docs/api_reference/Filesystem-API.html#FS.readFile

You can also traverse the FS data directly, at a lower level. Here is how test_poppler in the test suite gets a file's data, for example:

MEMFS.getFileDataAsRegularArray(FS.root.contents['filename-1.ppm'])

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