feat: add options for controlling buffer usage

Author: ejose19

Diff for: lib/manager.ts

@@ -257,6 +257,18 @@ export interface ManagerOptions extends EngineOptions {
    * the parser to use. Defaults to an instance of the Parser that ships with socket.io.
    */
   parser: any;
+
+  /**
+   * Should we buffer receive events if socket is not connected
+   * @default true
+   */
+  enableReceiveBuffer: boolean;
+
+  /**
+   * Should we buffer send events if socket is not connected
+   * @default true
+   */
+  enableSendBuffer: boolean;
 }
 
 export class Manager extends Emitter {
@@ -278,6 +290,14 @@ export class Manager extends Emitter {
    * @private
    */
   _reconnecting: boolean;
+  /**
+   * @private
+   */
+  _enableReceiveBuffer: boolean;
+  /**
+   * @private
+   */
+  _enableSendBuffer: boolean;
 
   private readonly uri: string;
   private readonly opts: object;
@@ -333,6 +353,8 @@ export class Manager extends Emitter {
     this.encoder = new _parser.Encoder();
     this.decoder = new _parser.Decoder();
     this._autoConnect = opts.autoConnect !== false;
+    this._enableReceiveBuffer = opts.enableReceiveBuffer !== false;
+    this._enableSendBuffer = opts.enableSendBuffer !== false;
     if (this._autoConnect) this.open();
   }
 

Diff for: lib/socket.ts

@@ -162,7 +162,7 @@ export class Socket extends Emitter {
       debug("discard packet as the transport is not currently writable");
     } else if (this.connected) {
       this.packet(packet);
-    } else {
+    } else if (this.io._enableSendBuffer) {
       this.sendBuffer.push(packet);
     }
 
@@ -273,7 +273,7 @@ export class Socket extends Emitter {
       args.push(this.ack(packet.id));
     }
 
-    if (this.connected) {
+    if (this.connected || this.io._enableReceiveBuffer) {
       this.emitEvent(args);
     } else {
       this.receiveBuffer.push(args);