Golang如何构建简易的社交动态发布系统

type Post struct {
    ID        int       `json:"id"`
    UserID    int       `json:"user_id"`
    Content   string    `json:"content"`
    Timestamp time.Time `json:"timestamp"`
}

func main() {
    posts := []Post{} // 内存存储
    http.HandleFunc("/post", func(w http.ResponseWriter, r *http.Request) {
        if r.Method == "POST" {
            var p Post
            json.NewDecoder(r.Body).Decode(&p)
            p.Timestamp = time.Now()
            posts = append(posts, p)
            w.WriteHeader(201)
            json.NewEncoder(w).Encode(p)
        } else {
            w.Header().Set("Content-Type", "application/json")
            json.NewEncoder(w).Encode(posts)
        }
    })
    http.ListenAndServe(":8080", nil)
}

if p.Content == "" {
    http.Error(w, "内容不能为空", 400)
    return
}

sort.Slice(posts, func(i, j int) bool {
    return posts[i].Timestamp.After(posts[j].Timestamp)
})

curl -X POST -H "Content-Type: application/json" \
-d '{"user_id": 1, "content": "今天天气真好！"}' \
http://localhost:8080/post

curl http://localhost:8080/post