1 files changed, 355 insertions, 0 deletions
diff --git a/ext/node/polyfills/internal/stream_base_commons.ts b/ext/node/polyfills/internal/stream_base_commons.ts
new file mode 100644
index 000000000..dd1c74d0f
--- /dev/null
+++ b/ext/node/polyfills/internal/stream_base_commons.ts
@@ -0,0 +1,355 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import { ownerSymbol } from "internal:deno_node/polyfills/internal/async_hooks.ts";
+import {
+  kArrayBufferOffset,
+  kBytesWritten,
+  kLastWriteWasAsync,
+  LibuvStreamWrap,
+  streamBaseState,
+  WriteWrap,
+} from "internal:deno_node/polyfills/internal_binding/stream_wrap.ts";
+import { isUint8Array } from "internal:deno_node/polyfills/internal/util/types.ts";
+import { errnoException } from "internal:deno_node/polyfills/internal/errors.ts";
+import {
+  getTimerDuration,
+  kTimeout,
+} from "internal:deno_node/polyfills/internal/timers.mjs";
+import { setUnrefTimeout } from "internal:deno_node/polyfills/timers.ts";
+import { validateFunction } from "internal:deno_node/polyfills/internal/validators.mjs";
+import { codeMap } from "internal:deno_node/polyfills/internal_binding/uv.ts";
+import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+
+export const kMaybeDestroy = Symbol("kMaybeDestroy");
+export const kUpdateTimer = Symbol("kUpdateTimer");
+export const kAfterAsyncWrite = Symbol("kAfterAsyncWrite");
+export const kHandle = Symbol("kHandle");
+export const kSession = Symbol("kSession");
+export const kBuffer = Symbol("kBuffer");
+export const kBufferGen = Symbol("kBufferGen");
+export const kBufferCb = Symbol("kBufferCb");
+
+// deno-lint-ignore no-explicit-any
+function handleWriteReq(req: any, data: any, encoding: string) {
+  const { handle } = req;
+
+  switch (encoding) {
+    case "buffer": {
+      const ret = handle.writeBuffer(req, data);
+
+      if (streamBaseState[kLastWriteWasAsync]) {
+        req.buffer = data;
+      }
+
+      return ret;
+    }
+    case "latin1":
+    case "binary":
+      return handle.writeLatin1String(req, data);
+    case "utf8":
+    case "utf-8":
+      return handle.writeUtf8String(req, data);
+    case "ascii":
+      return handle.writeAsciiString(req, data);
+    case "ucs2":
+    case "ucs-2":
+    case "utf16le":
+    case "utf-16le":
+      return handle.writeUcs2String(req, data);
+    default: {
+      const buffer = Buffer.from(data, encoding);
+      const ret = handle.writeBuffer(req, buffer);
+
+      if (streamBaseState[kLastWriteWasAsync]) {
+        req.buffer = buffer;
+      }
+
+      return ret;
+    }
+  }
+}
+
+// deno-lint-ignore no-explicit-any
+function onWriteComplete(this: any, status: number) {
+  let stream = this.handle[ownerSymbol];
+
+  if (stream.constructor.name === "ReusedHandle") {
+    stream = stream.handle;
+  }
+
+  if (stream.destroyed) {
+    if (typeof this.callback === "function") {
+      this.callback(null);
+    }
+
+    return;
+  }
+
+  if (status < 0) {
+    const ex = errnoException(status, "write", this.error);
+
+    if (typeof this.callback === "function") {
+      this.callback(ex);
+    } else {
+      stream.destroy(ex);
+    }
+
+    return;
+  }
+
+  stream[kUpdateTimer]();
+  stream[kAfterAsyncWrite](this);
+
+  if (typeof this.callback === "function") {
+    this.callback(null);
+  }
+}
+
+function createWriteWrap(
+  handle: LibuvStreamWrap,
+  callback: (err?: Error | null) => void,
+) {
+  const req = new WriteWrap<LibuvStreamWrap>();
+
+  req.handle = handle;
+  req.oncomplete = onWriteComplete;
+  req.async = false;
+  req.bytes = 0;
+  req.buffer = null;
+  req.callback = callback;
+
+  return req;
+}
+
+export function writevGeneric(
+  // deno-lint-ignore no-explicit-any
+  owner: any,
+  // deno-lint-ignore no-explicit-any
+  data: any,
+  cb: (err?: Error | null) => void,
+) {
+  const req = createWriteWrap(owner[kHandle], cb);
+  const allBuffers = data.allBuffers;
+  let chunks;
+
+  if (allBuffers) {
+    chunks = data;
+
+    for (let i = 0; i < data.length; i++) {
+      data[i] = data[i].chunk;
+    }
+  } else {
+    chunks = new Array(data.length << 1);
+
+    for (let i = 0; i < data.length; i++) {
+      const entry = data[i];
+      chunks[i * 2] = entry.chunk;
+      chunks[i * 2 + 1] = entry.encoding;
+    }
+  }
+
+  const err = req.handle.writev(req, chunks, allBuffers);
+
+  // Retain chunks
+  if (err === 0) {
+    req._chunks = chunks;
+  }
+
+  afterWriteDispatched(req, err, cb);
+
+  return req;
+}
+
+export function writeGeneric(
+  // deno-lint-ignore no-explicit-any
+  owner: any,
+  // deno-lint-ignore no-explicit-any
+  data: any,
+  encoding: string,
+  cb: (err?: Error | null) => void,
+) {
+  const req = createWriteWrap(owner[kHandle], cb);
+  const err = handleWriteReq(req, data, encoding);
+
+  afterWriteDispatched(req, err, cb);
+
+  return req;
+}
+
+function afterWriteDispatched(
+  // deno-lint-ignore no-explicit-any
+  req: any,
+  err: number,
+  cb: (err?: Error | null) => void,
+) {
+  req.bytes = streamBaseState[kBytesWritten];
+  req.async = !!streamBaseState[kLastWriteWasAsync];
+
+  if (err !== 0) {
+    return cb(errnoException(err, "write", req.error));
+  }
+
+  if (!req.async && typeof req.callback === "function") {
+    req.callback();
+  }
+}
+
+// Here we differ from Node slightly. Node makes use of the `kReadBytesOrError`
+// entry of the `streamBaseState` array from the `stream_wrap` internal binding.
+// Here we pass the `nread` value directly to this method as async Deno APIs
+// don't grant us the ability to rely on some mutable array entry setting.
+export function onStreamRead(
+  // deno-lint-ignore no-explicit-any
+  this: any,
+  arrayBuffer: Uint8Array,
+  nread: number,
+) {
+  // deno-lint-ignore no-this-alias
+  const handle = this;
+
+  let stream = this[ownerSymbol];
+
+  if (stream.constructor.name === "ReusedHandle") {
+    stream = stream.handle;
+  }
+
+  stream[kUpdateTimer]();
+
+  if (nread > 0 && !stream.destroyed) {
+    let ret;
+    let result;
+    const userBuf = stream[kBuffer];
+
+    if (userBuf) {
+      result = stream[kBufferCb](nread, userBuf) !== false;
+      const bufGen = stream[kBufferGen];
+
+      if (bufGen !== null) {
+        const nextBuf = bufGen();
+
+        if (isUint8Array(nextBuf)) {
+          stream[kBuffer] = ret = nextBuf;
+        }
+      }
+    } else {
+      const offset = streamBaseState[kArrayBufferOffset];
+      const buf = Buffer.from(arrayBuffer, offset, nread);
+      result = stream.push(buf);
+    }
+
+    if (!result) {
+      handle.reading = false;
+
+      if (!stream.destroyed) {
+        const err = handle.readStop();
+
+        if (err) {
+          stream.destroy(errnoException(err, "read"));
+        }
+      }
+    }
+
+    return ret;
+  }
+
+  if (nread === 0) {
+    return;
+  }
+
+  if (nread !== codeMap.get("EOF")) {
+    // CallJSOnreadMethod expects the return value to be a buffer.
+    // Ref: https://github.com/nodejs/node/pull/34375
+    stream.destroy(errnoException(nread, "read"));
+
+    return;
+  }
+
+  // Defer this until we actually emit end
+  if (stream._readableState.endEmitted) {
+    if (stream[kMaybeDestroy]) {
+      stream[kMaybeDestroy]();
+    }
+  } else {
+    if (stream[kMaybeDestroy]) {
+      stream.on("end", stream[kMaybeDestroy]);
+    }
+
+    if (handle.readStop) {
+      const err = handle.readStop();
+
+      if (err) {
+        // CallJSOnreadMethod expects the return value to be a buffer.
+        // Ref: https://github.com/nodejs/node/pull/34375
+        stream.destroy(errnoException(err, "read"));
+
+        return;
+      }
+    }
+
+    // Push a null to signal the end of data.
+    // Do it before `maybeDestroy` for correct order of events:
+    // `end` -> `close`
+    stream.push(null);
+    stream.read(0);
+  }
+}
+
+export function setStreamTimeout(
+  // deno-lint-ignore no-explicit-any
+  this: any,
+  msecs: number,
+  callback?: () => void,
+) {
+  if (this.destroyed) {
+    return this;
+  }
+
+  this.timeout = msecs;
+
+  // Type checking identical to timers.enroll()
+  msecs = getTimerDuration(msecs, "msecs");
+
+  // Attempt to clear an existing timer in both cases -
+  //  even if it will be rescheduled we don't want to leak an existing timer.
+  clearTimeout(this[kTimeout]);
+
+  if (msecs === 0) {
+    if (callback !== undefined) {
+      validateFunction(callback, "callback");
+      this.removeListener("timeout", callback);
+    }
+  } else {
+    this[kTimeout] = setUnrefTimeout(this._onTimeout.bind(this), msecs);
+
+    if (this[kSession]) {
+      this[kSession][kUpdateTimer]();
+    }
+
+    if (callback !== undefined) {
+      validateFunction(callback, "callback");
+      this.once("timeout", callback);
+    }
+  }
+
+  return this;
+}