Go与iOS跨平台TCP数据传输：高效序列化方案选择与实践

package main

import (
    "bytes"
    "fmt"
    "log"

    "github.com/vmihailenco/msgpack/v5" // 推荐使用v5版本
)

// 定义需要传输的数据结构
type Message struct {
    ID      int    `msgpack:"id"`
    Content string `msgpack:"content"`
    Timestamp int64 `msgpack:"timestamp"`
    Tags    []string `msgpack:"tags,omitempty"` // omitempty表示如果为空则不序列化
}

func main() {
    // 待发送的数据
    dataToSend := Message{
        ID:      101,
        Content: "Hello from Go server!",
        Timestamp: 1678886400, // 示例时间戳
        Tags:    []string{"greeting", "test"},
    }

    // 序列化为MsgPack格式的字节数组
    encodedBytes, err := msgpack.Marshal(&dataToSend)
    if err != nil {
        log.Fatalf("Error encoding data: %v", err)
    }

    fmt.Printf("Encoded MsgPack data (hex): %x\n", encodedBytes)
    fmt.Printf("Encoded data length: %d bytes\n", len(encodedBytes))

    // 模拟TCP发送 (这里只是打印，实际会通过TCP连接发送)
    // conn.Write(encodedBytes)

    // --- 模拟接收端反序列化 (可选，用于验证) ---
    var receivedData Message
    err = msgpack.Unmarshal(encodedBytes, &receivedData)
    if err != nil {
        log.Fatalf("Error decoding data: %v", err)
    }

    fmt.Printf("Decoded data: %+v\n", receivedData)
}

import Foundation
// 假设你已经通过CocoaPods或Swift Package Manager集成了MsgPack.swift库

// 假设这是从TCP连接接收到的MsgPack二进制数据
let receivedMsgPackData: Data = Data([0x84, 0xa2, 0x69, 0x64, 0x0a, 0xa7, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0xb7, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x66, 0x72, 0x6f, 0x6d, 0x20, 0x47, 0x6f, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x21, 0xa9, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0xcb, 0x00, 0x00, 0x00, 0x00, 0x64, 0x14, 0x90, 0x00, 0xa4, 0x74, 0x61, 0x67, 0x73, 0x92, 0xa8, 0x67, 0x72, 0x65, 0x65, 0x74, 0x69, 0x6e, 0x67, 0xa4, 0x74, 0x65, 0x73, 0x74]) // 对应Go示例的输出

struct Message: Decodable {
    let id: Int
    let content: String
    let timestamp: Int64
    let tags: [String]? // 注意：Go中的omitempty对应Swift中的可选类型
}

do {
    // 使用MsgPackDecoder进行反序列化
    let decoder = MsgPackDecoder()
    let decodedMessage = try decoder.decode(Message.self, from: receivedMsgPackData)

    print("Decoded ID: \(decodedMessage.id)")
    print("Decoded Content: \(decodedMessage.content)")
    print("Decoded Timestamp: \(decodedMessage.timestamp)")
    if let tags = decodedMessage.tags {
        print("Decoded Tags: \(tags)")
    } else {
        print("Decoded Tags: nil")
    }

} catch {
    print("Error decoding MsgPack data: \(error)")
}