Interacting with an x86 DLL

[connor-ricks]

Hello, I am trying to work with an old DLL that operates in x86.

When attempting to access the DLL I get this error...

The module was expected to contain an assembly manifest

The error is System.BadImageFormatException which I would usually attest to an x86 vs x64 conflict.

Any ideas?

Here is the code I'm using...

  var test = edge.func({
    assemblyFile: 'app/api/TestCOM/testcom.dll',
    typeName: 'TestCOM.TestCOM',
    methodName: 'GetName',
  });

  const output= test({}, true);

Thanks!
Connor

[agracio]

Try using node x86.
Take a look at this line

edge-js/lib/edge.js

Line 10 in e8705e8

var nativePath = path.resolve(__dirname, `native/${process.platform}/${process.arch}/${nodeVersion}`);

[connor-ricks]

Dang, so there isn't a way to execute a 32bit DLL from 64bit note 😢

For various reasons (Next.JS requiring 64-bit and others) I can't downgrade to 32 bit node. I guess I'll need to figure out a different way of interacting with the DLL.

[agracio]

You could create some kind of postinstall script to patch this line and force it to load ia32 dll instead.
Take a look at https://github.com/agracio/edge-js/tree/master/lib/native/win32 dir structure.
This would only work on Windows.

Start by just replacing that line in node_modules/edge-js/lib/edge.js to see if it resolves the issue.

var nativePath = path.resolve(__dirname, `native/${process.platform}/ia32/${nodeVersion}`);