.net-自定义微信分享
1.需要微信服务号的appid，密钥
2.微信公众平台添加白名单，配置js安全域名
3.需要把配置安全js域名时提供的文件放在网站的根目录下
4.前端调用后台接口，获取ticket
5.后台根据appid、密钥来调微信接口获取token、ticket
下面是js里的函数，功能是从接口获取ticket，然后自定义分享
function weixin_share(wxTitle,wxCon,wxIMg){
var wxurl = location.href.split('#')[0].toString();
// wxurl=encodeURIComponent(wxurl);
var ua = navigator.userAgent.toLowerCase();
//if (ua.match(/MicroMessenger/i) == "micromessenger") {
$.ajax({
type: "POST",
url: "/api/GetWeXinData",
dataType: "json",
async: false,
data: {
wxurl: wxurl
},
success: function (data) {
console.log(data)
if (data.status == "ok") {
wx.config({
debug: false,
appId: data.appid,
timestamp: data.timestamp,
nonceStr: data.nonceStr,
signature: data.signature,
jsApiList: [
'checkJsApi',
'onMenuShareTimeline',//分享朋友圈
'onMenuShareAppMessage',//分享微信好友
'onMenuShareQQ',//分享QQ好友
'onMenuShareWeibo',//分享腾讯微博
'onMenuShareQZone'//分享QQ空间
]
});
}
},
error: function (xhr, status, error) {
console.log(status);
console.log(xhr.responseText);
},
});
function checkJsApi() {
wx.checkJsApi({
jsApiList: ['checkJsApi', 'onMenuShareTimeline', 'onMenuShareAppMessage',//分享微信好友
'onMenuShareQQ',//分享QQ好友
'onMenuShareWeibo',//分享腾讯微博
'onMenuShareQZone'//分享QQ空间
],
success: function (res) {
// 以键值对的形式返回，可用的api值true，不可用为false
// 如：{"checkResult":{"chooseImage":true},"errMsg":"checkJsApi:ok"}
//var jon = $.parseJSON(res);
console.log("判断接口是否被支持:" + jon.errMsg.checkJsApi);
}
});
}
//分享微信朋友圈
function onMenuShareTimeline() {
wx.onMenuShareTimeline({
title: wxTitle,
link: wxurl,
imgUrl: wxIMg,
trigger: function (res) {
console.log('click shared');
},
success: function (res) {
console.log('分享成功!');
console.log(res);
},
cancel: function (res) {
console.log('shared cancle');
console.log(res);
},
fail: function (res) {
console.log("分享失败"+res);
console.log(JSON.stringify(res));
}
});
}
//分享微信好友
function onMenuShareAppMessage() {
wx.onMenuShareAppMessage({
title: wxTitle,
desc: wxCon,
link: wxurl,
imgUrl: wxIMg,
trigger: function (res) {
// 不要尝试在trigger中使用ajax异步请求修改本次分享的内容，因为客户端分享操作是一个同步操作，这时候使用ajax的回包会还没有返回
console.log('用户点击发送给朋友');
},
success: function (res) {
console.log('已分享');
},
cancel: function (res) {
console.log('已取消');
},
fail: function (res) {
console.log(JSON.stringify(res));
}
});
}
function onMenuShareQQ() {
wx.onMenuShareQQ({
title: wxTitle,
desc: wxCon,
link: wxurl,
imgUrl: wxIMg,
trigger: function (res) {
console.log('用户点击分享到QQ');
},
complete: function (res) {
console.log(JSON.stringify(res));
},
success: function (res) {
console.log('已分享');
},
cancel: function (res) {
console.log('已取消');
},
fail: function (res) {
console.log('分享成功!');
console.log(JSON.stringify(res));
}
});
}
function onMenuShareQZone() {
wx.onMenuShareQZone({
title: wxTitle,
desc: wxCon,
link: wxurl,
imgUrl: wxIMg,
trigger: function (res) {
console.log('用户点击分享到QZone');
},
complete: function (res) {
console.log(JSON.stringify(res));
},
success: function (res) {
console.log('已分享');
},
cancel: function (res) {
console.log('已取消');
},
fail: function (res) {
console.log(JSON.stringify(res));
console.log('分享失败!');
}
});
}
wx.ready(function () {
checkJsApi();
onMenuShareTimeline();
onMenuShareQZone();
onMenuShareQQ();
onMenuShareAppMessage();
});
wx.error(function (res) {
console.log(res.errMsg);
});
//}
}
js部分就是上面的。不要忘了，html中应引用js和自定义标题，图片等
<script src="https://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>
<script src="~/js/WX_share.js"></script>
<script>weixin_share('描述', '标题', '/图片/weixin.jpg')</script>
接下来就是后台接口的实现了：
public ActionResult GetWeXinData()
{
Signature sg = new Signature();
long timeout = 7200;//过期时间7200s
try
{
String url = Request["wxurl"];
if (string.IsNullOrEmpty(url))
{
sg.status = "error";
}
sg.appid = ConfigurationManager.AppSettings["wx_appid"];//获取appid
string secret= ConfigurationManager.AppSettings["wx_secret"];//获取密钥
sg.wxurl = url;
sg.nonceStr = WXJsJdkHelper.GetNonceStr();
sg.timestamp = WXJsJdkHelper.GetTimestamp();
var accesstoken = CacheHelper.GetCache("accesstoken_");//从缓存中获取，不能频繁的调用微信服务器接口，一天有次数限制
string token = "";
if (accesstoken == null)
{
WXJsJdkHelper.GetAccessToken(sg.appid, secret, out token);
CacheHelper.SetCacheDateTime("accesstoken_", token, timeout);
}else
{
token = accesstoken.ToString();
}
var wxticket = CacheHelper.GetCache("wxticket_");
if (wxticket == null)
{
sg.wxticket = WXJsJdkHelper.GetJsAPITicket(token);
CacheHelper.SetCacheDateTime("wxticket_", sg.wxticket, timeout);
}else
{
sg.wxticket = wxticket.ToString();
}
LogHelper.WriteLog("获取微信token:"+ accesstoken+ "ticket" + sg.wxticket);
sg.status = "ok";
sg.signature = WXJsJdkHelper.GetSHA1Value(WXJsJdkHelper.GetNonSHA1HashSignature(sg.nonceStr, sg.wxticket, sg.timestamp, sg.wxurl));
return Json(sg, JsonRequestBehavior.AllowGet);
}
catch (Exception ex)
{
LogHelper.WriteLog("获取微信签名配置信息时错误:", ex);
sg.status = "error";
sg.nonceStr = string.Empty;
sg.signature = string.Empty;
sg.timestamp = string.Empty;
sg.wxurl = string.Empty;
sg.wxticket = string.Empty;
return Json(sg, JsonRequestBehavior.AllowGet);
}
}
获取AccessToken的方法
public static bool GetAccessToken(string appid, string secret, out string res)
{
//正确的返回值格式{"access_token":"rcSFy_BaOHfW92AdXmer1ec4yLbMYeW3Sl3N29uKM96cRJnfZkpxUTr9VTw7ih4S9OY9tTqd5c697iNWVeXesqVPWFRi5pLRAnyPJNw7aMhIaK_dJDo3cxoXfyahUtyAOGXiAAATLC","expires_in":7200}
//错误返回值格式{"errcode":40013,"errmsg":"invalid appid"}
string strJson = GetJsonData(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, secret), "get");
string access_token = GetJsonValue(strJson, "access_token");
if (string.IsNullOrEmpty(access_token))
{
res = GetJsonValue(strJson, "errcode");
return false;
}
res = access_token;
return true;
}
根据accesstoken获取对应的JsAPITicket的方法
public static string GetJsAPITicket(string accesstoken)
{
string strJson = GetJsonData(string.Format("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={0}&type=jsapi", accesstoken), "get");
string jsapiticket = GetJsonValue(strJson, "ticket");
if (string.IsNullOrEmpty(jsapiticket))
{
return GetJsonValue(strJson, "errcode");
}
return jsapiticket;
}
获取SHA1Value值
public static string GetSHA1Value(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;
}
//
缓存的CatchHelper.cs
/// <summary> /// 获取数据缓存 /// </summary> /// <param name="CacheKey">键</param> public static object GetCache(string CacheKey) { Cache objCache = HttpRuntime.Cache; if (objCache[CacheKey] == null) return null; else return objCache[CacheKey]; }
public static void SetCacheDateTime(string CacheKey, object objObject, long Seconds) { Cache objCache = HttpRuntime.Cache; objCache.Insert(CacheKey, objObject, null, System.DateTime.Now.AddSeconds(Seconds), TimeSpan.Zero); }
