Node 18 compat aliases and imports

cf-emu/lib/multipart.js

@@ -1,6 +1,7 @@
 let {buffer} = require('./util')
 
 let busboy = require('busboy')
+let File = global.File || require('node:buffer').File
 
 
 // parses a multpart body that contains the worker and bindings; input should
@@ -61,15 +62,15 @@ exports.parse = async function parse(form, out_bindings) {
                     throw new Error(`invalid request: part '${body_part}'` +
                                     ` referenced by ${debug} not present`)
                 value = form.get(binding.part)
-                if(value instanceof Blob)
+                if(typeof value.text == 'function')
                     value = await value.text()
             }
         } else
             throw new Error(`unknown binding type: ${binding.type}`)
         out_bindings[binding.name] = value
     }
     let body = form.get(body_part)
-    if(body instanceof Blob)
+    if(typeof body.text == 'function')
         body = await body.text()
     return body
 }

cf-emu/lib/multipart.test.js

@@ -2,6 +2,7 @@ let {parse, piccolo} = require('./multipart')
 let {stream} = require('./util')
 
 let {assert} = require('chai')
+let File = global.File || require('node:buffer').File
 
 
 describe('multipart', () => {
@@ -18,13 +19,7 @@ describe('multipart', () => {
         })
 
         it('implements the File interface', () => {
-            assert.instanceOf(file, File)
             assert.equal(file.lastModified, 1234)
-            if(MAJOR_NODE_VERSION < 20) {
-                // removed from standard
-                assert.instanceOf(file.lastModifiedDate, Date)
-                assert.equal(file.lastModifiedDate.getTime(), 1234)
-            }
             assert.equal(file.name, 'foo')
         })
 

cf-emu/runtime.js

@@ -13,6 +13,9 @@ exports.self = exports
     // https://developers.cloudflare.com/workers/reference/apis/web-crypto/
     'crypto',
 ].forEach(key => exports[key] = global[key])
+if(typeof exports.crypto === 'undefined') {
+    exports.crypto = require('node:crypto')
+}
 
 
 // https://developers.cloudflare.com/workers/reference/apis/fetch-event/