Warensoft Unity3D通信库使用向导2-利用UnityHttpClient类实现Http通信
(作者:warensoft,有问题请联系warensoft@163.com)
利用Warensoft.Unity.Communication.Client.UnityHttpClient类可以实现Http Get请求以及POST请求,并可以使用简单的获取本次请求所对对应的响应。可以使用该类完全代替内置的WWW类。
推荐使用UnityHttpClient替代WWW的原因有以下几点:
1>WWW类的使用不符合微软命名规范
2>大量并发使用WWW类时会抛出Too Many Threads的异常.UnityHttpClient已经在内部对并发线程数量进行了控制.
使用UnityHttpClient类,代码更加简洁
下面通过代码展示如何使用UnityHttpClient类:
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下载Warensoft Unity3D通信库
该类库是Codeplex上的开源项目,地址是:http://wucl.codeplex.com,从上面下载类库的最新版本,下载后得到两个DLL文件,其中Warensoft.Unity.Communication.dll就是我们在本Demo中用的DLL文件,另外一个Warensoft.DataService.dll是数据服务库,在后面的章节中会讲解如何使用.
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为了客户端代码能成功演示,下面在VisualStudio中建立一个网站,当做Http服务器,为了演示UnityHttpClient对文件的请求,需要在网站中添加一个名为Test.xml的XML文件,以及一个test.png的PNG图,如下图所示:
Test.xml的内容如下所示:
<?xml version="1.0" encoding="utf-8" ?> <Root> <Customer>ALFKI</Customer> </Root>
Test.png的图片如下所示:
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; public partial class GetTest : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //该代码功能是通过查询字符串CustomerID的值去查询该客户对应的公司名, //并将查找到的公司返回给客户端 string customerid = this.Request.QueryString["CustomerID"]; if (customerid!=null ) { string companyName = ""; using (SqlConnection con=new SqlConnection ("server=.;database=northwind;uid=sa;pwd=sa")) { var cmd = con.CreateCommand(); cmd.CommandText = "select companyname from customers where customerid=@customerid"; cmd.Parameters.AddWithValue("@customerid",customerid); con.Open(); var result = cmd.ExecuteScalar(); if (result !=null ) { companyName = result.ToString(); } } this.Response.Write(companyName); this.Response.End(); } } }
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; public partial class PostTest : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //该代码功能是通过获取客户端以Post方式发送的CustomerID的值去查询该客户//对应的公司名,并将查找到的公司返回给客户端 if (this.Request .ContentLength!=0) { //获取POST的数据流 var strm = this.Request.InputStream; //建立缓冲区 byte[]buffer=new byte[this.Request .ContentLength]; //将POST过来的数据读取出来,并且存储在buffer中 strm.Read(buffer,0,buffer .Length ); //将二进制数据转化为字符串 string customerid = System.Text.Encoding.UTF8.GetString(buffer); string companyName = ""; using (SqlConnection con = new SqlConnection("server=.;database=northwind;uid=sa;pwd=sa")) { var cmd = con.CreateCommand(); cmd.CommandText = "select companyname from customers where customerid=@customerid"; cmd.Parameters.AddWithValue("@customerid", customerid); con.Open(); var result = cmd.ExecuteScalar(); if (result != null) { companyName = result.ToString(); } } this.Response.Write(companyName); this.Response.End(); } } }
using UnityEngine; using System.Collections; using Warensoft.Unity.Communication.Client; using System; using System.Xml; public class HttpTest : MonoBehaviour { UnityHttpClient httpClient = null; private Texture2D image; void Start () { //启动时将httpClient初始化 this.httpClient = UnityCommunicationManager.CreateInstance().GetHttpClient(); this.httpClient.Error += new EventHandler<HttpRequestErrorEventArgs>(httpClient_Error); } void httpClient_Error(object sender, HttpRequestErrorEventArgs e) { print(e.ResponseText ); } int initStep = 0; void Update () { if (this.initStep ==0&&this.httpClient!=null ) { //获取XML文件 this.httpClient.BeginGetHttpContent("http://localhost:17737/test11/test.xml", //后面的方法是本次异步Http请求成功并响应后的回调方法 new Action<XmlDocument>((doc) => { //打印XML文件 print("response xml content:"); print(doc.OuterXml); })); //获取图片 this.httpClient.BeginGetHttpContent("http://localhost:17737/test11/test.png", //后面的方法是本次异步Http请求成功并响应后的回调方法 new Action<Texture2D>((img) => { this.image = img; })); //获取纯文本 //通过客户ID查询公司名 //GET方式 this.httpClient.BeginGetHttpContent("http://localhost:17737/test11/GetTest.aspx?CustomerID=ALFKI", //后面的方法是本次异步Http请求成功并响应后的回调方法 new Action<string>((stringResult) => { //打印公司名 print("Get the company name of alfki:" + stringResult); })); //获取纯文本 //通过客户ID查询公司名 //POST方式 byte[] contentBuffer = System.Text.Encoding.UTF8.GetBytes("ALFKI"); this.httpClient.BeginPost("http://localhost:17737/test11/PostTest.aspx", contentBuffer, (response) => { //打印公司名 print("Post the company name of alfki:" + response.StringContent); }); this.initStep = 1; } } void OnGUI() { if (this.image !=null ) { GUI.DrawTexture(new Rect (0,0,this.image .width,this.image.height),this.image); } } }
游戏视图输出如下图所示:
控制台输出内容如下图所示: