feat: 更新WebSocket 优化逻辑

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/websocket/src/engine.io-parser/index.ts

@@ -0,0 +1,42 @@
+import { encodePacket } from "./encodePacket"
+import { decodePacket } from "./decodePacket"
+
+const SEPARATOR = String.fromCharCode(30) // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
+
+const encodePayload = (packets, callback) => {
+    // some packets may be added to the array while encoding, so the initial length must be saved
+    const length = packets.length
+    const encodedPackets = new Array(length)
+    let count = 0
+
+    packets.forEach((packet, i) => {
+        // force base64 encoding for binary packets
+        encodePacket(packet, false, encodedPacket => {
+            encodedPackets[i] = encodedPacket
+            if (++count === length) {
+                callback(encodedPackets.join(SEPARATOR))
+            }
+        })
+    })
+}
+
+const decodePayload = (encodedPayload, binaryType) => {
+    const encodedPackets = encodedPayload.split(SEPARATOR)
+    const packets = []
+    for (let i = 0; i < encodedPackets.length; i++) {
+        const decodedPacket = decodePacket(encodedPackets[i], binaryType)
+        packets.push(decodedPacket)
+        if (decodedPacket.type === "error") {
+            break
+        }
+    }
+    return packets
+}
+
+export default {
+    protocol: 4,
+    encodePacket,
+    encodePayload,
+    decodePacket,
+    decodePayload
+}