Merge pull request #66 from golemcloud/node-stream

Node stream support

Author: vigoo

README.md

@@ -1003,3 +1003,18 @@ There are a few important things to keep in mind when working on the project:
   times and huge resulting binaries. Use the `cleanup-skeleton.sh` script to quickly remove the `target` directory from
   the `skeleton` crate.
 
+## Acknowledgements
+
+The builtin JS modules are based on the work of several other projects:
+ 
+- [base64-js](https://github.com/beatgammit/base64-js)
+- [buffer](https://github.com/feross/buffer)
+- [consoleTable](https://github.com/ronnyKJ/consoleTable)
+- [eventemitter3](https://github.com/primus/eventemitter3)
+- [fetch-blob](https://github.com/node-fetch/fetch-blob)
+- [fetch.js](https://github.com/JakeChampion/fetch/blob/main/fetch.js)
+- [FormData](https://github.com/jimmywarting/FormData)
+- [ieee754](https://github.com/feross/ieee754)
+- [url-search-params-polyfill](https://github.com/jerrybendy/url-search-params-polyfill)
+- [wasmedge-quickjs](https://github.com/second-state/wasmedge-quickjs)
+- [web-streams-polyfill](https://github.com/MattiasBuelens/web-streams-polyfill)

crates/wasm-rquickjs/skeleton/Cargo.toml_

@@ -20,12 +20,13 @@ logging = ["dep:wasi-logging"]
 
 [dependencies]
 # Core dependencies
+# rquickjs = { version = "0.10.0", default-features = false, features = ["full-async-wasi"] }
+# rquickjs = { git = "https://github.com/DelSkayn/rquickjs", rev="7e921da7637ce6c330ab206f17d9ae5d275d8755", default-features = false, features = ["full-async-wasi"] }
 rquickjs = { version = "0.9.0", default-features = false, features = ["futures", "bindgen", "loader", "macro"] }
 
 encoding_rs = "0.8.35"
 futures = { version = "0.3.31", features = [] }
 futures-concurrency = "7.6.3"
-pin-project = "1.1.10"
 url = "2.5.7"
 uuid = { version = "1.18.1", features = ["v4"] }
 rand = "0.9.2"

crates/wasm-rquickjs/skeleton/src/builtin/eventemitter.js

@@ -0,0 +1,338 @@
+// From https://github.com/primus/eventemitter3/
+
+'use strict';
+
+var has = Object.prototype.hasOwnProperty
+    , prefix = '~';
+
+/**
+ * Constructor to create a storage for our `EE` objects.
+ * An `Events` instance is a plain object whose properties are event names.
+ *
+ * @constructor
+ * @private
+ */
+function Events() {}
+
+//
+// We try to not inherit from `Object.prototype`. In some engines creating an
+// instance in this way is faster than calling `Object.create(null)` directly.
+// If `Object.create(null)` is not supported we prefix the event names with a
+// character to make sure that the built-in object properties are not
+// overridden or used as an attack vector.
+//
+if (Object.create) {
+    Events.prototype = Object.create(null);
+
+    //
+    // This hack is needed because the `__proto__` property is still inherited in
+    // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.
+    //
+    if (!new Events().__proto__) prefix = false;
+}
+
+/**
+ * Representation of a single event listener.
+ *
+ * @param {Function} fn The listener function.
+ * @param {*} context The context to invoke the listener with.
+ * @param {Boolean} [once=false] Specify if the listener is a one-time listener.
+ * @constructor
+ * @private
+ */
+function EE(fn, context, once) {
+    this.fn = fn;
+    this.context = context;
+    this.once = once || false;
+}
+
+/**
+ * Add a listener for a given event.
+ *
+ * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+ * @param {(String|Symbol)} event The event name.
+ * @param {Function} fn The listener function.
+ * @param {*} context The context to invoke the listener with.
+ * @param {Boolean} once Specify if the listener is a one-time listener.
+ * @returns {EventEmitter}
+ * @private
+ */
+function addListener(emitter, event, fn, context, once) {
+    if (typeof fn !== 'function') {
+        throw new TypeError('The listener must be a function');
+    }
+
+    var listener = new EE(fn, context || emitter, once)
+        , evt = prefix ? prefix + event : event;
+
+    if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;
+    else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);
+    else emitter._events[evt] = [emitter._events[evt], listener];
+
+    return emitter;
+}
+
+/**
+ * Clear event by name.
+ *
+ * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+ * @param {(String|Symbol)} evt The Event name.
+ * @private
+ */
+function clearEvent(emitter, evt) {
+    if (--emitter._eventsCount === 0) emitter._events = new Events();
+    else delete emitter._events[evt];
+}
+
+/**
+ * Minimal `EventEmitter` interface that is molded against the Node.js
+ * `EventEmitter` interface.
+ *
+ * @constructor
+ * @public
+ */
+function EventEmitter() {
+    this._events = new Events();
+    this._eventsCount = 0;
+}
+
+/**
+ * Return an array listing the events for which the emitter has registered
+ * listeners.
+ *
+ * @returns {Array}
+ * @public
+ */
+EventEmitter.prototype.eventNames = function eventNames() {
+    var names = []
+        , events
+        , name;
+
+    if (this._eventsCount === 0) return names;
+
+    for (name in (events = this._events)) {
+        if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
+    }
+
+    if (Object.getOwnPropertySymbols) {
+        return names.concat(Object.getOwnPropertySymbols(events));
+    }
+
+    return names;
+};
+
+/**
+ * Return the listeners registered for a given event.
+ *
+ * @param {(String|Symbol)} event The event name.
+ * @returns {Array} The registered listeners.
+ * @public
+ */
+EventEmitter.prototype.listeners = function listeners(event) {
+    var evt = prefix ? prefix + event : event
+        , handlers = this._events[evt];
+
+    if (!handlers) return [];
+    if (handlers.fn) return [handlers.fn];
+
+    for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {
+        ee[i] = handlers[i].fn;
+    }
+
+    return ee;
+};
+
+/**
+ * Return the number of listeners listening to a given event.
+ *
+ * @param {(String|Symbol)} event The event name.
+ * @returns {Number} The number of listeners.
+ * @public
+ */
+EventEmitter.prototype.listenerCount = function listenerCount(event) {
+    var evt = prefix ? prefix + event : event
+        , listeners = this._events[evt];
+
+    if (!listeners) return 0;
+    if (listeners.fn) return 1;
+    return listeners.length;
+};
+
+/**
+ * Calls each of the listeners registered for a given event.
+ *
+ * @param {(String|Symbol)} event The event name.
+ * @returns {Boolean} `true` if the event had listeners, else `false`.
+ * @public
+ */
+EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
+    var evt = prefix ? prefix + event : event;
+
+    if (!this._events[evt]) return false;
+
+    var listeners = this._events[evt]
+        , len = arguments.length
+        , args
+        , i;
+
+    if (listeners.fn) {
+        if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);
+
+        switch (len) {
+            case 1: return listeners.fn.call(listeners.context), true;
+            case 2: return listeners.fn.call(listeners.context, a1), true;
+            case 3: return listeners.fn.call(listeners.context, a1, a2), true;
+            case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
+            case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
+            case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
+        }
+
+        for (i = 1, args = new Array(len -1); i < len; i++) {
+            args[i - 1] = arguments[i];
+        }
+
+        listeners.fn.apply(listeners.context, args);
+    } else {
+        var length = listeners.length
+            , j;
+
+        for (i = 0; i < length; i++) {
+            if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);
+
+            switch (len) {
+                case 1: listeners[i].fn.call(listeners[i].context); break;
+                case 2: listeners[i].fn.call(listeners[i].context, a1); break;
+                case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
+                case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;
+                default:
+                    if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
+                        args[j - 1] = arguments[j];
+                    }
+
+                    listeners[i].fn.apply(listeners[i].context, args);
+            }
+        }
+    }
+
+    return true;
+};
+
+/**
+ * Add a listener for a given event.
+ *
+ * @param {(String|Symbol)} event The event name.
+ * @param {Function} fn The listener function.
+ * @param {*} [context=this] The context to invoke the listener with.
+ * @returns {EventEmitter} `this`.
+ * @public
+ */
+EventEmitter.prototype.on = function on(event, fn, context) {
+    return addListener(this, event, fn, context, false);
+};
+
+/**
+ * Add a one-time listener for a given event.
+ *
+ * @param {(String|Symbol)} event The event name.
+ * @param {Function} fn The listener function.
+ * @param {*} [context=this] The context to invoke the listener with.
+ * @returns {EventEmitter} `this`.
+ * @public
+ */
+EventEmitter.prototype.once = function once(event, fn, context) {
+    return addListener(this, event, fn, context, true);
+};
+
+/**
+ * Remove the listeners of a given event.
+ *
+ * @param {(String|Symbol)} event The event name.
+ * @param {Function} fn Only remove the listeners that match this function.
+ * @param {*} context Only remove the listeners that have this context.
+ * @param {Boolean} once Only remove one-time listeners.
+ * @returns {EventEmitter} `this`.
+ * @public
+ */
+EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
+    var evt = prefix ? prefix + event : event;
+
+    if (!this._events[evt]) return this;
+    if (!fn) {
+        clearEvent(this, evt);
+        return this;
+    }
+
+    var listeners = this._events[evt];
+
+    if (listeners.fn) {
+        if (
+            listeners.fn === fn &&
+            (!once || listeners.once) &&
+            (!context || listeners.context === context)
+        ) {
+            clearEvent(this, evt);
+        }
+    } else {
+        for (var i = 0, events = [], length = listeners.length; i < length; i++) {
+            if (
+                listeners[i].fn !== fn ||
+                (once && !listeners[i].once) ||
+                (context && listeners[i].context !== context)
+            ) {
+                events.push(listeners[i]);
+            }
+        }
+
+        //
+        // Reset the array, or remove it completely if we have no more listeners.
+        //
+        if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;
+        else clearEvent(this, evt);
+    }
+
+    return this;
+};
+
+/**
+ * Remove all listeners, or those of the specified event.
+ *
+ * @param {(String|Symbol)} [event] The event name.
+ * @returns {EventEmitter} `this`.
+ * @public
+ */
+EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
+    var evt;
+
+    if (event) {
+        evt = prefix ? prefix + event : event;
+        if (this._events[evt]) clearEvent(this, evt);
+    } else {
+        this._events = new Events();
+        this._eventsCount = 0;
+    }
+
+    return this;
+};
+
+//
+// Alias methods names because people roll like that.
+//
+EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+EventEmitter.prototype.addListener = EventEmitter.prototype.on;
+
+//
+// Expose the prefix.
+//
+EventEmitter.prefixed = prefix;
+
+//
+// Allow `EventEmitter` to be imported as module namespace.
+//
+EventEmitter.EventEmitter = EventEmitter;
+
+//
+// Expose the module.
+//
+export { EventEmitter };
+
+export default { EventEmitter };

crates/wasm-rquickjs/skeleton/src/builtin/eventemitter.rs

@@ -0,0 +1,2 @@
+// JS functions for the EventEmitter implementation
+pub const EVENTEMITTER_JS: &str = include_str!("eventemitter.js");