feat: move binary detection back to the parser

See socketio/socket.io-parser@285e7cd

Breaking change: the Socket#binary() method is removed, as this use
case is now covered by the ability to provide your own parser.

lib/index.ts

@@ -595,17 +595,6 @@ export class Server extends EventEmitter {
     return this;
   }
 
-  /**
-   * Sets the binary flag
-   *
-   * @param {Boolean} binary - encode as if it has binary data if `true`, Encode as if it doesnt have binary data if `false`
-   * @return {Server} self
-   */
-  public binary(binary: boolean): Server {
-    this.sockets.binary(binary);
-    return this;
-  }
-
   /**
    * Sets a modifier for a subsequent event emission that the event data may be lost if the client is not ready to
    * receive messages (because of network slowness or other issues, or because they’re connected through long polling

lib/namespace.ts

@@ -3,7 +3,6 @@ import { Server } from "./index";
 import { Client } from "./client";
 import { EventEmitter } from "events";
 import { PacketType } from "socket.io-parser";
-import hasBin from "has-binary2";
 import debugModule from "debug";
 import { Adapter, Room, SocketId } from "socket.io-adapter";
 
@@ -172,11 +171,7 @@ export class Namespace extends EventEmitter {
     // set up packet object
     args.unshift(ev);
     const packet = {
-      type: (this.flags.binary !== undefined
-      ? this.flags.binary
-      : hasBin(args))
-        ? PacketType.BINARY_EVENT
-        : PacketType.EVENT,
+      type: PacketType.EVENT,
       data: args
     };
 
@@ -248,17 +243,6 @@ export class Namespace extends EventEmitter {
     return this;
   }
 
-  /**
-   * Sets the binary flag
-   *
-   * @param {Boolean} binary - encode as if it has binary data if `true`, Encode as if it doesnt have binary data if `false`
-   * @return {Namespace} self
-   */
-  public binary(binary: boolean): Namespace {
-    this.flags.binary = binary;
-    return this;
-  }
-
   /**
    * Sets a modifier for a subsequent event emission that the event data may be lost if the client is not ready to
    * receive messages (because of network slowness or other issues, or because they’re connected through long polling

lib/socket.ts

@@ -1,6 +1,5 @@
 import { EventEmitter } from "events";
 import { PacketType } from "socket.io-parser";
-import hasBin from "has-binary2";
 import url from "url";
 import debugModule from "debug";
 import { Server } from "./index";
@@ -136,11 +135,7 @@ export class Socket extends EventEmitter {
     }
     args.unshift(ev);
     const packet: any = {
-      type: (this.flags.binary !== undefined
-      ? this.flags.binary
-      : hasBin(args))
-        ? PacketType.BINARY_EVENT
-        : PacketType.EVENT,
+      type: PacketType.EVENT,
       data: args
     };
 
@@ -356,7 +351,7 @@ export class Socket extends EventEmitter {
 
       self.packet({
         id: id,
-        type: hasBin(args) ? PacketType.BINARY_ACK : PacketType.ACK,
+        type: PacketType.ACK,
         data: args
       });
 
@@ -460,17 +455,6 @@ export class Socket extends EventEmitter {
     return this;
   }
 
-  /**
-   * Sets the binary flag
-   *
-   * @param {Boolean} binary - encode as if it has binary data if `true`, Encode as if it doesnt have binary data if `false`
-   * @return {Socket} self
-   */
-  public binary(binary: boolean): Socket {
-    this.flags.binary = binary;
-    return this;
-  }
-
   /**
    * Sets a modifier for a subsequent event emission that the event data may be lost if the client is not ready to
    * receive messages (because of network slowness or other issues, or because they’re connected through long polling

package.json

@@ -37,10 +37,9 @@
     "base64id": "~2.0.0",
     "debug": "~4.1.0",
     "engine.io": "~4.0.0",
-    "has-binary2": "~1.0.2",
     "socket.io-adapter": "~2.0.1",
     "socket.io-client": "3.0.0-rc1",
-    "socket.io-parser": "4.0.1-rc1"
+    "socket.io-parser": "4.0.1-rc2"
   },
   "devDependencies": {
     "@types/cookie": "^0.4.0",