Agent
Properties
An object which contains arrays of sockets currently awaiting use by the agent when keepAlive is enabled. Do not modify.
By default set to 256. For agents with keepAlive enabled, this sets the maximum number of sockets that will be left open in the free state.
By default set to Infinity. Determines how many concurrent sockets the agent can have open per origin. Origin is the returned value of agent.getName().
By default set to Infinity. Determines how many concurrent sockets the agent can have open. Unlike maxSockets, this parameter applies across all origins.
An object which contains queues of requests that have not yet been assigned to sockets. Do not modify.
An object which contains arrays of sockets currently in use by the agent. Do not modify.
Functions
Alias for emitter.on(eventName, listener).
Produces a socket/stream to be used for HTTP requests.
Returns an array listing the events for which the emitter has registered listeners. The values in the array are strings or Symbols.
Returns the current max listener value for the EventEmitter which is either set by emitter.setMaxListeners(n) or defaults to {@link EventEmitter.defaultMaxListeners}.
Get a unique name for a set of request options, to determine whether a connection can be reused. For an HTTP agent, this returnshost:port:localAddress or host:port:localAddress:family. For an HTTPS agent, the name includes the CA, cert, ciphers, and other HTTPS/TLS-specific options that determine socket reusability.
Called when socket is detached from a request and could be persisted by theAgent. Default behavior is to:
Returns the number of listeners listening for the event named eventName. If listener is provided, it will return how many times the listener is found in the list of the listeners of the event.
Returns a copy of the array of listeners for the event named eventName.
Alias for emitter.removeListener().
Adds the listener function to the end of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.
Adds a one-time listener function for the event named eventName. The next time eventName is triggered, this listener is removed and then invoked.
Adds the listener function to the beginning of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.
Adds a one-timelistener function for the event named eventName to the beginning of the listeners array. The next time eventName is triggered, this listener is removed, and then invoked.
Returns a copy of the array of listeners for the event named eventName, including any wrappers (such as those created by .once()).
Removes all listeners, or those of the specified eventName.
Removes the specified listener from the listener array for the event named eventName.
Called when socket is attached to request after being persisted because of the keep-alive options. Default behavior is to:
By default EventEmitters will print a warning if more than 10 listeners are added for a particular event. This is a useful default that helps finding memory leaks. The emitter.setMaxListeners() method allows the limit to be modified for this specific EventEmitter instance. The value can be set to Infinity (or 0) to indicate an unlimited number of listeners.