runno 0.2.0

Run untrusted code inside the Runno WebAssembly sandbox.

runno

Package for running code inside the Runno WebAssembly sandbox.

Quickstart

The run_code method allows you to run a snippet of code.

from runno import run_code

code = "print('Hello, World!')"
result = await run_code("python", code)

if result.result_type == "complete":
    print("OUTPUT:")
    print(result.tty)
else:
    print("ERROR")

Available runtimes are: python, quickjs, sqlite, clang, clangpp, ruby, and php-cgi.

Including Files

If you want to process files within your sandbox, you can include them in the file system by using the run_fs method.

from runno import run_fs, WASIFS, StringFile, WASITimestamps

fs: WASIFS = {
    "/program.py": StringFile(
        path="/program.py",
        timestamps=WASITimestamps(
            access=datetime.now(),
            modification=datetime.now(),
            change=datetime.now(),
        ),
        mode="string",
        content="""
print(open('data.csv'))
""",
    ),
    "/data.csv": StringFile(
        path="/data.csv",
        timestamps=WASITimestamps(
            access=datetime.now(),
            modification=datetime.now(),
            change=datetime.now(),
        ),
        mode="string",
        content="""
a,b,c
1,2,3
""",
    )
}

await run_fs(runtime, "/program", fs)

Including Dependencies

You can use the same technique to include pure python packages as dependencies. The interface for this is not super nice right now, but it's on the way.

Limiting Execution Time

You can limit how much time is allocated for execution using an optional timeout kwarg (measured in seconds). Like:

from runno import run_code

code = "while True: pass"
result = await run_code("python", code, timeout=5)

if result.result_type == "timeout":
    print("Timed out.")
else:
    print("Wow, it ran forever.")