1、准备工作
官方文档：https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html#111
必须是认证过的公众号才可以，先登录微信公众平台进入“公众号设置”的“功能设置”里填写“js接口安全域名”、“网页授权域名”
然后在开发设置中获取AppID和AppSecret，并设置ip白名单
2、前端
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>https://www.cnblogs.com/webapi/</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<meta name="description" content="https://www.cnblogs.com/webapi/" />
<meta name="keywords" content="https://www.cnblogs.com/webapi/" />
<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
<meta http-equiv="Pragma" content="no-cache">
<script src="https://cdn.bootcss.com/jquery/1.8.1/jquery.min.js"></script>
<script type="text/javascript" src="http://res.wx.qq.com/open/js/jweixin-1.4.0.js"></script>
<script type="text/javascript">
var pagetUrl = window.location.href;
$(function () {
//--微信JS配置
if (wx != null && wx != undefined) {
if (pagetUrl.indexOf("#") > 0) {
pagetUrl = str.substring(0, pagetUrl.indexOf("#"));
}
$.ajax({
url: "weixinshare.aspx",
type: "post",
data: { purl: pagetUrl },
dataType: "json",
success: function (data) {
wx.config({
debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
appId: data.appid, // 必填，公众号的唯一标识
timestamp: data.timestamp, // 必填，生成签名的时间戳
nonceStr: data.nonceStr, // 必填，生成签名的随机串
signature: data.signature, // 必填，签名，见附录1
jsApiList: ['updateAppMessageShareData', 'updateTimelineShareData'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});
}
});
wx.ready(function () {
//自定义“分享给朋友”及“分享到QQ”按钮的分享内容（1.4.0）
wx.ready(function () { //需在用户可能点击分享按钮前就先调用
wx.updateAppMessageShareData({
title: '微信分享测试-分享标题', // 分享标题
desc: '微信分享测试-分享描述,微信分享测试-分享描述', // 分享描述
link: pagetUrl, // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
imgUrl: 'https://www.baidu.com/img/bd_logo1.png', // 分享图标
success: function () {
// 设置成功
}
})
});
//自定义“分享到朋友圈”及“分享到QQ空间”按钮的分享内容（1.4.0）
wx.ready(function () { //需在用户可能点击分享按钮前就先调用
wx.updateTimelineShareData({
title: '微信分享测试-分享标题,微信分享测试-分享描述', // 分享标题
link: pagetUrl, // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
imgUrl: 'https://www.baidu.com/img/bd_logo1.png', // 分享图标
success: function () {
// 设置成功
}
})
});
});
}
});
</script>
</head>
<body>
<h1>微信分享测试</h1>
<div>
微信JS-SDK是微信公众平台 面向网页开发者提供的基于微信内的网页开发工具包。通过使用微信JS-SDK，网页开发者可借助微信高效地使用拍照、选图、语音、位置等手机系统的能力，同时可以直接使用微信分享、扫一扫、卡券、支付等微信特有的能力，为微信用户提供更优质的网页体验。此文档面向网页开发者介绍微信JS-SDK如何使用及相关注意事项
</div>
</body>
</html>3、后台
using LitJson;
using System;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text; public partial class weixin_weixin : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html#111 string url = Request.Form["purl"]; string appid = "wxd111111111111";
string appSecret = "";
string jsapiTicket = getJsApiTicket(appid, appSecret);
// 获取时间戳
string timestamp = Convert.ToString(GetTimeStamp());
// 获取随机字符串
string nonceStr = createNonceStr();
// 获取签名signature
string rawstring = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + nonceStr + "×tamp=" + timestamp + "&url=" + url + "";
string signature = SHA1_Hash(rawstring);
// 返回的json
string json = "{\"appid\":\"" + appid + "\",\"timestamp\":\"" + timestamp + "\",\"nonceStr\":\"" + nonceStr + "\",\"signature\":\"" + signature + "\"}";
Response.Write(json);
Response.End();
}
//创建随机字符串
public string createNonceStr()
{
int length = ;
string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
string str = "";
Random rad = new Random();
for (int i = ; i < length; i++)
{
str += chars.Substring(rad.Next(, chars.Length - ), );
}
return str;
}
public string GetTimeStamp()
{
TimeSpan ts = DateTime.UtcNow - new DateTime(, , , , , , );
return Convert.ToInt64(ts.TotalSeconds).ToString();
} public string SHA1_Hash(string str_sha1_in)
{
SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] bytes_sha1_in = System.Text.UTF8Encoding.Default.GetBytes(str_sha1_in);
byte[] bytes_sha1_out = sha1.ComputeHash(bytes_sha1_in);
string str_sha1_out = BitConverter.ToString(bytes_sha1_out);
str_sha1_out = str_sha1_out.Replace("-", "").ToLower();
return str_sha1_out;
}
// 获取Token
public string GetToken(string appid, string secret)
{
//获取token，有效期7200秒，需要cache
string strJson = string.Empty;
if (GetCache("token") != null)
{
strJson = GetCache("token").ToString();
}
else {
strJson = RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, secret));
SetCache("token", strJson, );
} JsonData jd = JsonMapper.ToObject(strJson);
return jd["access_token"].ToString();
}
//获取ticket
public string getJsApiTicket(string appid, string appSecret)
{
//获取ticket,有效期7200秒，需要cache
string token = GetToken(appid, appSecret); string strJson = string.Empty;
if (GetCache("ticket") != null)
{
strJson = GetCache("ticket").ToString();
}
else
{
strJson = RequestUrl("https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=" + token);
SetCache("ticket", strJson, );
} JsonData jd = JsonMapper.ToObject(strJson);
return jd["ticket"].ToString();
}//公共方法，request网络获取
public string RequestUrl(string url)
{
// 设置参数
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "get";
request.ContentType = "text/html";
request.Headers.Add("charset", "utf-8"); HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);
string content = sr.ReadToEnd();
return content;
}
/// <summary>
/// 创建缓存项过期
/// </summary>
/// <param name="key">缓存Key</param>
/// <param name="obj">object对象</param>
/// <param name="expires">过期时间(分钟)</param>
public void SetCache(string key, object obj, int expires)
{
Cache.Insert(key, obj, null, DateTime.UtcNow.AddMinutes(expires), TimeSpan.Zero);
}
public object GetCache(string key)
{
if (string.IsNullOrEmpty(key))
{
return null;
}
return Cache.Get(key);
}
}