unity http www封装之美

Get请求：参数在链接里面，问号后面的都是参数。

Post请求：参数在表单里面。服务器在底层看见post会自动分配一个大的空间。

1、Get

string url="http://kun.show.ghostry.cn/?int=5";
StartCoroutine(SendGet(url));

Ienumerator SendGet(string url)
{
   WWW www=new WWW(url);
   yield return www;
   //判断下载是否有错
   if(string.IsNullOrEmpty(www.error)
   {
      //TODO
   }
}


2、Post

string url="http://kun.show.ghostry.cn/";
WWWForm wwwForm=new WWWForm();
wwwForm.AddField("int",5);
StartCoroutine(SendPost(url,wwwForm));

Ienumerator SendPost(string url,WWWForm form)
{
   WWW www=new WWW(url,form);
   yield return www;
   //判断下载是否有错
   if(string.IsNullOrEmpty(www.error)
   {
      //TODO
   }
}

WWW ：    还能下载本地资源

IOS：File://

Android: Jar:file://

Pc: File:///

/// <summary>
    /// 根据不同平台给url加前缀
    /// </summary>
    /// <param name="url"></param>
    /// <returns></returns>
    public string Initial(string url)
    {
        if (Application.platform == RuntimePlatform.WindowsEditor || Application.platform == RuntimePlatform.WindowsPlayer)
        {
            url = "file:///" + url;

        }
        else if (Application.platform == RuntimePlatform.Android)
        {
            url = "jar:file://" + url;
        }
        else
        {
            url = "file://" + url;
        }
        return url;
    }

    string url = Application.dataPath + "/WWW/WWWTest.cs";
    url=Initial(url);
    StartCoroutine(SendGet(url));

         Application.dataPath : 这个文件访问工程文件只能在Pc上；

         Application.streamingAssetsPath  ：用文件系统可读可写，比如（File，streamRead，streamWrite）

          Android：SD卡

          IOS：Document

          Pc：C:\Users\...\AppData

         Application.persistentDataPath: 这个路径下的所有东西都会打包到真机上面。只能用WWW读，不能写。

         （File，streamRead，streamWrite）不能读写。

​WWW封装：​

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

/// <summary>
/// 注意WWW已经被弃用，可以用UnityWebRequest代替
/// </summary>

//抽象基类
public class WWWItem 
{
    //开始下载
    public virtual void DownloadStart()
    { }
    //下载完成
    public virtual void DownloadFinish(WWW www)
    { }
    //下载出错
    public virtual void DownloadError(WWWItem tempItem)
    { }

    private string url;

    public string URL
    {
        get
        {
            return url;
        }
        set
        {
            url = value;
        }
    }
    //下载调用
    public IEnumerator Download()
    {
        DownloadStart();
        WWW www = new WWW(url);

        yield return www;
        if (string.IsNullOrEmpty(www.error))
        {
            DownloadFinish(www);
        }
        else
        {
            DownloadError(this);
        }
    }
}

//下载队列
public class WWWHelp : MonoBehaviour
{
    public static WWWHelp Instance;
    Queue<WWWItem> allTask;

    private void Start()
    {
        Instance = this;
        allTask = new Queue<WWWItem>();
    }

    bool isDownloadingFinish = true;
    //下载任务入队列
    public void AddTask(WWWItem item)
    {
        allTask.Enqueue(item);
        if(allTask.Count==1 && isDownloadingFinish)
        {
            isDownloadingFinish = false;
            StartCoroutine(DownloadItem());
        }
    }
    public IEnumerator DownloadItem()
    {
        while(allTask.Count>0)
        {
           WWWItem item= allTask.Dequeue();
            yield return item.Download();
        }
        isDownloadingFinish=true;
    }
}

public class WWWTxt:WWWItem
{

    public WWWTxt(string url)
    {
        Initial(url);
    }

    public void Initial(string url)
    {
        if (Application.platform == RuntimePlatform.WindowsEditor || Application.platform == RuntimePlatform.WindowsPlayer)
        {
            this.URL = "file:///" + url;

        }
        else if (Application.platform == RuntimePlatform.Android)
        {
            this.URL = "jar:file://" + url;
        }
        else
        {
            this.URL = "file://" + url;
        }

    }


    public override void DownloadStart()
    {
        //base.DownloadStart();
        Debug.Log("start download.");
    }

    public override void DownloadFinish(WWW www)
    {
        //base.DownloadFinish(www);
        Debug.Log("finish download" + www.text);
        //解析 解压在这里
    }

    public override void DownloadError(WWWItem tempItem)
    {
        // base.DownloadError(tempItem);
        WWWHelp.Instance.AddTask(tempItem);
    }
}



public class WWWTest:MonoBehaviour
{
    private void Update()
    {
        if(Input.GetKeyDown(KeyCode.A))
        {
            string url = "bulabula";
            WWWTxt tempText = new WWWTxt(url);
            WWWHelp.Instance.AddTask(tempText);
        }
    }
}