Deno object in local edge functions does not contain all props

[vladgardus]

Describe the bug
I'm trying to upload a file via a POST request using oak on my local edge functions and while trying to read the form data I get the following error: Deno.makeTempDir is not a function.

This is how I'm trying to read the form data: const data = await ctx.request.body({ type: 'form-data' }).value.read();, where ctx is the RouterContext provided by oak.

While doing some debugging I ended up logging the entire Deno object and this is the result:

{
  listen: [Function: listen],
  connect: [AsyncFunction: connect],
  connectTls: [AsyncFunction: connectTls],
  startTls: [AsyncFunction: startTls],
  resolveDns: [AsyncFunction: resolveDns],
  serveHttp: [Function: serveHttp],
  permissions: Permissions {},
  Permissions: [Class: Permissions],
  PermissionStatus: [Class: PermissionStatus],
  errors: {
    Interrupted: [Class: Interrupted],
    BadResource: [Class: BadResource],
    InvalidWorkerResponse: [Class: classErr] { getName: [Function (anonymous)] },
    InvalidWorkerCreation: [Class: classErr] { getName: [Function (anonymous)] },
    NotFound: [Class: classErr] { getName: [Function (anonymous)] },
    PermissionDenied: [Class: classErr] { getName: [Function (anonymous)] },
    ConnectionRefused: [Class: classErr] { getName: [Function (anonymous)] },
    ConnectionReset: [Class: classErr] { getName: [Function (anonymous)] },
    ConnectionAborted: [Class: classErr] { getName: [Function (anonymous)] },
    NotConnected: [Class: classErr] { getName: [Function (anonymous)] },
    AddrInUse: [Class: classErr] { getName: [Function (anonymous)] },
    AddrNotAvailable: [Class: classErr] { getName: [Function (anonymous)] },
    BrokenPipe: [Class: classErr] { getName: [Function (anonymous)] },
    AlreadyExists: [Class: classErr] { getName: [Function (anonymous)] },
    InvalidData: [Class: classErr] { getName: [Function (anonymous)] },
    TimedOut: [Class: classErr] { getName: [Function (anonymous)] },
    WriteZero: [Class: classErr] { getName: [Function (anonymous)] },
    WouldBlock: [Class: classErr] { getName: [Function (anonymous)] },
    UnexpectedEof: [Class: classErr] { getName: [Function (anonymous)] },
    Http: [Class: classErr] { getName: [Function (anonymous)] },
    Busy: [Class: classErr] { getName: [Function (anonymous)] },
    NotSupported: [Class: classErr] { getName: [Function (anonymous)] }
  },
  build: {
    target: "x86_64-unknown-linux-gnu",
    arch: "x86_64",
    os: "linux",
    vendor: "unknown",
    env: "gnu"
  },
  env: {
    get: [Function: getEnv],
    toObject: [Function: toObject],
    set: [Function: setEnv],
    has: [Function: has],
    delete: [Function: deleteEnv]
  },
  pid: undefined,
  args: [],
  mainModule: [Getter/Setter]
}

As you can see, there are a lot of missing properties/methods from the Deno object.

Is this intended?

[laktek]

Yes, Edge Functions don't have access to the file system. That's the reason why file system related properties are disabled in Deno global.

If you're trying to use Oak to read form-data, check the following example which uses in-memory buffer to store the uploaded files https://github.com/supabase/supabase/blob/master/examples/edge-functions/supabase/functions/file-upload-storage/index.ts#L13-L19