Unity3D 网络通信_HTTP协议:获取网络图片、内容

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网络通信_HTTP协议:获取网络图片、内容

自己写的测试demo，一个功能一个功能测试着做的，没有什么结构，凑合看吧。

http协议，在手机平台，URL必须必带http://头。

此脚本主要实现了 

分别用pose和get方式获取天气预报信息（XML格式）。
解析XML

获取网络图片
获取网络图片（base64格式）
base64与byte[]互转
byte[]与Texture2D（图片）互转

更多常用WEBService：http://www.webxml.com.cn/zh_cn/web_services.aspx

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.IO;

public class HTTPDemo : MonoBehaviour
{
public string HostName = "http://www.webxml.com.cn";
//城市天气预报服务
public string URLPath = "/WebServices/WeatherWebService.asmx/getWeatherbyCityName";
//获得验证码服务（直接获得图片）
private string PictureName = "/WebServices/ValidateCodeWebService.asmx/cnValidateImage?byString='Picture'";
//获得验证码服务（获得图片字节流）
private string PictureByteName = "/WebServices/ValidateCodeWebService.asmx/cnValidateByte?byString='picByte'";

private Texture2D mPicture;
private Texture2D mPictureByte;
private Texture2D mConvertPNG;

public string[] Parameters = new string[] { "theCityName" };

private string XMLContent = "null";

public string testC = "null";

void OnGUI()
{
//显示测试信息
GUI.Label(new Rect(100, 10, 1000, 38), testC);

//表单传值
if (GUI.Button(new Rect(10, 50, 100, 60), "post"))
{
postWeatherbyCityName("北京");
}
GUI.Button(new Rect(120, 80, 100 + getJindu() * 100, 20), (getJindu() * 100) + "%");

//get传值（android平台不支持中文参数）
if (GUI.Button(new Rect(10, 130, 100, 60), "get"))
{
getWeatherbyCityName("58367");//上海
}
GUI.Button(new Rect(120, 150, 100 + getJindu() * 100, 20), (getJindu() * 100) + "%");

//显示读取到的天气预报原始信息（xml格式）
GUI.Label(new Rect(10, 220, 380, 500), mContent);

//解析xml
if (GUI.Button(new Rect(500, 200, 120, 60), "AnalysisXML"))
{
XMLContent = AnalysisXML();
}
GUI.Label(new Rect(410, 220, 380, 500), XMLContent);

//下载网络图片
if (GUI.Button(new Rect(10, 750, 80, 60), "downPic"))
{
downloadPicture(PictureName);
}
GUI.Label(new Rect(100, 760, 200, 200), mPicture);

//下载网络图片 （base64格式）
if (GUI.Button(new Rect(350, 750, 80, 60), "downPicByte"))
{
downloadPictureByte(PictureByteName);
}
GUI.Label(new Rect(450, 760, 200, 200), mPictureByte);
}

public void postWeatherbyCityName(string str)
{
//将参数集合封装到Dictionary集合方便传值
Dictionary<string, string> dic = new Dictionary<string, string>();

//参数
dic.Add(Parameters[0], str);

StartCoroutine(POST(HostName + URLPath , dic));
}

public void getWeatherbyCityName(string str)
{
//将参数集合封装到Dictionary集合方便传值
Dictionary<string, string> dic = new Dictionary<string, string>();

//参数
dic.Add(Parameters[0], str);

StartCoroutine(GET(HostName + URLPath , dic));
}

//下载图片
public void downloadPicture(string picName)
{
testC ="picurl = " + picName;

StartCoroutine(GETTexture(HostName + picName));
}

//下载图片（字节流）
public void downloadPictureByte(string picName)
{
StartCoroutine(GETTextureByte(HostName + picName));
}

/*----------------------------------------------------Helper----------------------------------------------------------------------------*/

private float mJindu = 0;
private string mContent;

public float getJindu()
{
return mJindu;
}

//POST请求(Form表单传值、效率低、安全 ，)
IEnumerator POST(string url, Dictionary<string, string> post)
{
//表单
WWWForm form = new WWWForm();
//从集合中取出所有参数，设置表单参数（AddField()).
foreach (KeyValuePair<string, string> post_arg in post)
{
form.AddField(post_arg.Key, post_arg.Value);
}
//表单传值，就是post
WWW www = new WWW(url, form);

yield return www;
mJindu = www.progress;

if (www.error != null)
{
//POST请求失败
mContent =  "error :" + www.error;
}
else
{
//POST请求成功
mContent = www.text;
}
}

//GET请求（url?传值、效率高、不安全 ）
IEnumerator GET(string url, Dictionary<string, string> get)
{
string Parameters;
bool first;
if (get.Count > 0)
{
first = true;
Parameters = "?";
//从集合中取出所有参数，设置表单参数（AddField()).
foreach (KeyValuePair<string, string> post_arg in get)
{
if (first)
first = false;
else
Parameters += "&";

Parameters += post_arg.Key + "=" + post_arg.Value;
}
}
else
{
Parameters = "";
}

testC ="getURL :" + Parameters;

//直接URL传值就是get
WWW www = new WWW(url + Parameters);
yield return www;
mJindu = www.progress;

if (www.error != null)
{
//GET请求失败
mContent = "error :" + www.error;
}
else
{
//GET请求成功
mContent = www.text;
}
}

IEnumerator GETTexture(string picURL)
{
WWW wwwTexture = new WWW(picURL);

yield return wwwTexture;

if (wwwTexture.error != null)
{
//GET请求失败
Debug.Log("error :" + wwwTexture.error);
}
else
{
//GET请求成功
mPicture = wwwTexture.texture;
}
}

string PicByte;
IEnumerator GETTextureByte(string picURL)
{
WWW www = new WWW(picURL);

yield return www;

if (www.error != null)
{
//GET请求失败
Debug.Log("error :" + www.error);
}
else
{
//GET请求成功
Debug.Log("PicBytes text = " + www.text);

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(new StringReader(www.text));

//通过索引查找子节点
PicByte = xmlDoc.GetElementsByTagName("base64Binary").Item(0).InnerText;
testC = PicByte;

mPictureByte = BttetoPic(PicByte);
}
}

//解析XML
string AnalysisXML()
{
string str = "";

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(new StringReader(mContent));

//得到文档根节点的所有子节点集合
//XmlNodeList nodes = xmlDoc.DocumentElement.ChildNodes;
//通过节点名得到节点集合
XmlNodeList nodes = xmlDoc.GetElementsByTagName("string");

//通过索引查找子节点
str += "item[1] = " + xmlDoc.GetElementsByTagName("string").Item(1).InnerText + "\n\n";

//遍历所有子节点
foreach (XmlElement element in nodes)
{
if (element.Name == "string")
{
str += element.InnerText + "\n";
}
}

return str;
}

//图片与byte[]互转
public void convertPNG(Texture2D pic)
{
byte[] data = pic.EncodeToPNG();
Debug.Log("data = " + data.Length + "|" + data[0]);
mConvertPNG = new Texture2D(200, 200);
mConvertPNG.LoadImage(data);
}

//byte[]与base64互转
Texture2D BttetoPic(string base64)
{
Texture2D pic = new Texture2D(200,200);
//将base64转码为byte[]
byte[] data = System.Convert.FromBase64String(base64);
//加载byte[]图片
pic.LoadImage(data);

string base64str = System.Convert.ToBase64String(data);
Debug.Log("base64str = " + base64str);

return pic;
}
}