* first action! (#1)

node_modules/agent-base/index.js

@@ -0,0 +1,170 @@
+'use strict';
+require('./patch-core');
+const inherits = require('util').inherits;
+const promisify = require('es6-promisify');
+const EventEmitter = require('events').EventEmitter;
+
+module.exports = Agent;
+
+function isAgent(v) {
+  return v && typeof v.addRequest === 'function';
+}
+
+/**
+ * Base `http.Agent` implementation.
+ * No pooling/keep-alive is implemented by default.
+ *
+ * @param {Function} callback
+ * @api public
+ */
+function Agent(callback, _opts) {
+  if (!(this instanceof Agent)) {
+    return new Agent(callback, _opts);
+  }
+
+  EventEmitter.call(this);
+
+  // The callback gets promisified if it has 3 parameters
+  // (i.e. it has a callback function) lazily
+  this._promisifiedCallback = false;
+
+  let opts = _opts;
+  if ('function' === typeof callback) {
+    this.callback = callback;
+  } else if (callback) {
+    opts = callback;
+  }
+
+  // timeout for the socket to be returned from the callback
+  this.timeout = (opts && opts.timeout) || null;
+
+  this.options = opts;
+}
+inherits(Agent, EventEmitter);
+
+/**
+ * Override this function in your subclass!
+ */
+Agent.prototype.callback = function callback(req, opts) {
+  throw new Error(
+    '"agent-base" has no default implementation, you must subclass and override `callback()`'
+  );
+};
+
+/**
+ * Called by node-core's "_http_client.js" module when creating
+ * a new HTTP request with this Agent instance.
+ *
+ * @api public
+ */
+Agent.prototype.addRequest = function addRequest(req, _opts) {
+  const ownOpts = Object.assign({}, _opts);
+
+  // Set default `host` for HTTP to localhost
+  if (null == ownOpts.host) {
+    ownOpts.host = 'localhost';
+  }
+
+  // Set default `port` for HTTP if none was explicitly specified
+  if (null == ownOpts.port) {
+    ownOpts.port = ownOpts.secureEndpoint ? 443 : 80;
+  }
+
+  const opts = Object.assign({}, this.options, ownOpts);
+
+  if (opts.host && opts.path) {
+    // If both a `host` and `path` are specified then it's most likely the
+    // result of a `url.parse()` call... we need to remove the `path` portion so
+    // that `net.connect()` doesn't attempt to open that as a unix socket file.
+    delete opts.path;
+  }
+
+  delete opts.agent;
+  delete opts.hostname;
+  delete opts._defaultAgent;
+  delete opts.defaultPort;
+  delete opts.createConnection;
+
+  // Hint to use "Connection: close"
+  // XXX: non-documented `http` module API :(
+  req._last = true;
+  req.shouldKeepAlive = false;
+
+  // Create the `stream.Duplex` instance
+  let timeout;
+  let timedOut = false;
+  const timeoutMs = this.timeout;
+  const freeSocket = this.freeSocket;
+
+  function onerror(err) {
+    if (req._hadError) return;
+    req.emit('error', err);
+    // For Safety. Some additional errors might fire later on
+    // and we need to make sure we don't double-fire the error event.
+    req._hadError = true;
+  }
+
+  function ontimeout() {
+    timeout = null;
+    timedOut = true;
+    const err = new Error(
+      'A "socket" was not created for HTTP request before ' + timeoutMs + 'ms'
+    );
+    err.code = 'ETIMEOUT';
+    onerror(err);
+  }
+
+  function callbackError(err) {
+    if (timedOut) return;
+    if (timeout != null) {
+      clearTimeout(timeout);
+      timeout = null;
+    }
+    onerror(err);
+  }
+
+  function onsocket(socket) {
+    if (timedOut) return;
+    if (timeout != null) {
+      clearTimeout(timeout);
+      timeout = null;
+    }
+    if (isAgent(socket)) {
+      // `socket` is actually an http.Agent instance, so relinquish
+      // responsibility for this `req` to the Agent from here on
+      socket.addRequest(req, opts);
+    } else if (socket) {
+      function onfree() {
+        freeSocket(socket, opts);
+      }
+      socket.on('free', onfree);
+      req.onSocket(socket);
+    } else {
+      const err = new Error(
+        'no Duplex stream was returned to agent-base for `' + req.method + ' ' + req.path + '`'
+      );
+      onerror(err);
+    }
+  }
+
+  if (!this._promisifiedCallback && this.callback.length >= 3) {
+    // Legacy callback function - convert to a Promise
+    this.callback = promisify(this.callback, this);
+    this._promisifiedCallback = true;
+  }
+
+  if (timeoutMs > 0) {
+    timeout = setTimeout(ontimeout, timeoutMs);
+  }
+
+  try {
+    Promise.resolve(this.callback(req, opts)).then(onsocket, callbackError);
+  } catch (err) {
+    Promise.reject(err).catch(callbackError);
+  }
+};
+
+Agent.prototype.freeSocket = function freeSocket(socket, opts) {
+  // TODO reuse sockets
+  socket.destroy();
+};