Unity发送HTTP请求和文件下载_unity http下载

Unity发送HTTP请求和文件下载

本类库封装基于ulua框架LuaFramework

1. 使用的类库

HttpWebRequest
HttpWebResponse
LuaFramework

2. 实现了哪些功能

• 发送GET、POST请求
• HTTP请求异步化
• 支持Lua回调
• 支持Host，采用Proxy的实现方式
• 支持将HTTP请求内容保存为文件
• HTTP下载文件，支持断电续传

3. HTTP实现思路

• HTTPRequest 发起HTTP请求，异步回调返回HTTPResponse
HTTPRequest源码

using System;
using System.Net;
using System.IO;
using System.Text;
using System.Collections.Generic;
using LuaFramework;
using UnityEngine;
/// <summary>
/// Http请求
/// </summary>
public class HTTPRequest
{
    private string url;
    private int timeout;
    private Action<HTTPResponse> callback;
    private HttpWebRequest request;
    private string method;
    private string contentType;
    private KeyValuePair<string, int> proxy;
    protected int range = -1;
    // post内容
    private StringBuilder postBuilder;
    /// <summary>
    /// 错误代码
    /// </summary>
    public const int ERR_EXCEPTION = -1;
    /// <summary>
    /// 构造函数, 构造GET请求
    /// </summary>
    /// <param name="url">url地址</param>
    /// <param name="timeout">超时时间</param>
    /// <param name="callback">回调函数</param>
    public HTTPRequest (string url, string method, int timeout, Action<HTTPResponse> callback)
    {
        this.url = url;
        this.timeout = timeout;
        this.callback = callback;
        this.method = method.ToUpper();
    }
    /// <summary>
    /// 设置Post内容
    /// </summary>
    /// <param name="data">内容</param>
    public void SetPostData(string data) {
        if (postBuilder == null) {
            postBuilder = new StringBuilder (data.Length);
        }
        if (postBuilder.Length > 0) {
            postBu