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WeChat development-Jssdk call sharing example

高洛峰

Feb 13, 2017 am 11:36 AM

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using Newtonsoft.Json;
using System.Net;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Security.Cryptography;

/// <summary>
/// WXJSSDK 的摘要說(shuō)明
/// </summary>
public class WXJSSDK
{
    private string appId;
    private string appSecret;
    private DataTable DT;

    public WXJSSDK(string appId, string appSecret)
    {
        this.appId = appId;
        this.appSecret = appSecret;
    }

    //得到數(shù)據(jù)包，返回使用頁(yè)面  
    public System.Collections.Hashtable getSignPackage()
    {
        string jsapiTicket = getJsApiTicket();
        string url = HttpContext.Current.Request.Url.ToString(); 
        string timestamp = Convert.ToString(ConvertDateTimeInt(DateTime.Now));
        string nonceStr = createNonceStr();


        // 這里參數(shù)的順序要按照 key 值 ASCII 碼升序排序  
        string rawstring = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + nonceStr + "&timestamp=" + timestamp + "&url=" + url + "";


        string signature = SHA1_Hash(rawstring);


        System.Collections.Hashtable signPackage = new System.Collections.Hashtable();
        signPackage.Add("appId", appId);
        signPackage.Add("nonceStr", nonceStr);
        signPackage.Add("timestamp", timestamp);
        signPackage.Add("url", url);
        signPackage.Add("signature", signature);
        signPackage.Add("rawString", rawstring);


        return signPackage;
    }


    //創(chuàng)建隨機(jī)字符串  
    private string createNonceStr()
    {
        int length = 16;
        string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        string str = "";
        Random rad = new Random();
        for (int i = 0; i < length; i++)
        {
            str += chars.Substring(rad.Next(0, chars.Length - 1), 1);
        }
        return str;
    }


    //得到ticket 如果文件里時(shí)間 超時(shí)則重新獲取
    //注：jsapi_ticket使用規(guī)則（有過(guò)期時(shí)間）類似access_token, oauth的access_token與基礎(chǔ)access_token不同
    private string getJsApiTicket()
    {
        //這里我從數(shù)據(jù)庫(kù)讀取
        DT = DbSession.Default.FromSql("select jsapi_ticket,ticket_expires from table where ID=1").ToDataTable();
        int expire_time = (int)DT.Rows[0]["ticket_expires"];
        string ticket = DT.Rows[0]["jsapi_ticket"].ToString();
        string accessToken =getAccessToken();//獲取系統(tǒng)的全局token 
        if (expire_time < ConvertDateTimeInt(DateTime.Now))
        {
            string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=" + accessToken + "";
            Jsapi api =JsonConvert.DeserializeObject<Jsapi>(httpGet(url));
            ticket = api.ticket;
            if (ticket != "")
            {
                expire_time = ConvertDateTimeInt(DateTime.Now) + 7000;
                //存入數(shù)據(jù)庫(kù)操作
            }
        }
        return ticket;
    }


    ////得到accesstoken 如果文件里時(shí)間 超時(shí)則重新獲取  
    //private string getAccessToken()
    //{
    //    // access_token 應(yīng)該全局存儲(chǔ)與更新，以下代碼以寫入到文件中做示例
    //    string access_token = "";
    //    string path = HttpContext.Current.Server.MapPath(@"/weixin/access_token.json");
    //    FileStream file = new FileStream(path, FileMode.Open);
    //    var serializer = new DataContractJsonSerializer(typeof(AccToken));
    //    AccToken readJSTicket = (AccToken)serializer.ReadObject(file);
    //    file.Close();
    //    if (readJSTicket.expires_in < ConvertDateTimeInt(DateTime.Now))
    //    {
    //        string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId + "&secret=" + appSecret + "";

    //        AccToken iden = Desrialize<AccToken>(new AccToken(), httpGet(url));

    //        access_token = iden.access_token;
    //        if (access_token != "")
    //        {
    //            iden.expires_in = ConvertDateTimeInt(DateTime.Now) + 7000;
    //            iden.access_token = access_token;

    //            string json = Serialize<AccToken>(iden);
    //            StreamWriterMetod(json, path);
    //        }
    //    }
    //    else
    //    {
    //        access_token = readJSTicket.access_token;
    //    }
    //    return access_token;
    //}


    //發(fā)起一個(gè)http請(qǐng)球，返回值  
    private string httpGet(string url)
    {
        try
        {
            WebClient MyWebClient = new WebClient();
            MyWebClient.Credentials = CredentialCache.DefaultCredentials;//獲取或設(shè)置用于向Internet資源的請(qǐng)求進(jìn)行身份驗(yàn)證的網(wǎng)絡(luò)憑據(jù)  
            Byte[] pageData = MyWebClient.DownloadData(url); //從指定網(wǎng)站下載數(shù)據(jù)  
            string pageHtml = System.Text.Encoding.Default.GetString(pageData);  //如果獲取網(wǎng)站頁(yè)面采用的是GB2312，則使用這句              

            return pageHtml;
        }


        catch (WebException webEx)
        {
            Console.WriteLine(webEx.Message.ToString());
            return null;
        }
    }


    //SHA1哈希加密算法  
    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;
    }


    /// <summary>  
    /// StreamWriter寫入文件方法  
    /// </summary>  
    private void StreamWriterMetod(string str, string patch)
    {
        try
        {
            FileStream fsFile = new FileStream(patch, FileMode.OpenOrCreate);
            StreamWriter swWriter = new StreamWriter(fsFile);
            swWriter.WriteLine(str);
            swWriter.Close();
        }
        catch (Exception e)
        {
            throw e;
        }
    }

    /// <summary>  
    /// 將c# DateTime時(shí)間格式轉(zhuǎn)換為Unix時(shí)間戳格式  
    /// </summary>  
    /// <param name="time">時(shí)間</param>  
    /// <returns>double</returns>  
    public int ConvertDateTimeInt(System.DateTime time)
    {
        int intResult = 0;
        System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
        intResult = Convert.ToInt32((time - startTime).TotalSeconds);
        return intResult;
    }
}
//創(chuàng)建Json序列化 及反序列化類目  
#region
//創(chuàng)建JSon類 保存文件 jsapi_ticket.json  
public class JSTicket
{

    public string jsapi_ticket { get; set; }

    public double expire_time { get; set; }
}
//創(chuàng)建 JSon類 保存文件 access_token.json  

public class AccToken
{

    public string access_token { get; set; }

    public double expires_in { get; set; }
}


//創(chuàng)建從微信返回結(jié)果的一個(gè)類 用于獲取ticket  

public class Jsapi
{

    public int errcode { get; set; }

    public string errmsg { get; set; }

    public string ticket { get; set; }

    public string expires_in { get; set; }
}
#endregion

The above is the written class, and then directly call it and output it to js

WXJSSDK jssdk = new WXJSSDK(AppId,AppSecret);
Hashtable hs = jssdk.getSignPackage();
string signature = hs["signature"].ToString();
string signature = hs["signature"].ToString();
string timestamp = hs["timestamp"].ToString();
string nonce = hs["nonceStr"].ToString();

Then js call:

<script type="text/javascript">
            var dataForWeixin = {
                appId: "<%=appid%>",
                MsgImg: "<%=WeChatImg%>",
                TLImg: "<%=WeChatImg%>",
                url: "<%=url%>",
                title: "<%=Title%>",
                desc: "<%=desc%>",
                timestamp: &#39;<%=timestamp%>&#39;,
                nonceStr: &#39;<%=nonce%>&#39;,
                signature: &#39;<%=signature%>&#39;,
                jsApiList: [&#39;onMenuShareTimeline&#39;, &#39;onMenuShareAppMessage&#39;, &#39;onMenuShareQQ&#39;, &#39;onMenuShareWeibo&#39;],
                fakeid: "",
                callback: function () { }
            };
            wx.config({
                debug: false, // 開(kāi)啟調(diào)試模式,調(diào)用的所有api的返回值會(huì)在客戶端alert出來(lái)，若要查看傳入的參數(shù)，可以在pc端打開(kāi)，參數(shù)信息會(huì)通過(guò)log打出，僅在pc端時(shí)才會(huì)打印。
                appId: dataForWeixin.appId, // 必填，公眾號(hào)的唯一標(biāo)識(shí)
                timestamp: dataForWeixin.timestamp, // 必填，生成簽名的時(shí)間戳
                nonceStr: dataForWeixin.nonceStr, // 必填，生成簽名的隨機(jī)串
                signature: dataForWeixin.signature,// 必填，簽名，見(jiàn)附錄1
                jsApiList: dataForWeixin.jsApiList  // 必填，需要使用的JS接口列表，所有JS接口列表見(jiàn)附錄2
            });
            wx.ready(function () {
                //在此輸入各種API
                //分享到朋友圈
                wx.onMenuShareTimeline({
                    title: dataForWeixin.title, // 分享標(biāo)題
                    link: dataForWeixin.url, // 分享鏈接
                    imgUrl: dataForWeixin.MsgImg, // 分享圖標(biāo)
                    success: function () {
                        // 用戶確認(rèn)分享后執(zhí)行的回調(diào)函數(shù)
                    },
                    cancel: function () {
                        // 用戶取消分享后執(zhí)行的回調(diào)函數(shù)
                    }
                });
                //分享給朋友
                wx.onMenuShareAppMessage({
                    title: dataForWeixin.title, // 分享標(biāo)題
                    desc: dataForWeixin.desc, // 分享描述
                    link: dataForWeixin.url, // 分享鏈接
                    imgUrl: dataForWeixin.TLImg, // 分享圖標(biāo)
                    type: &#39;&#39;, // 分享類型,music、video或link，不填默認(rèn)為link
                    dataUrl: &#39;&#39;, // 如果type是music或video，則要提供數(shù)據(jù)鏈接，默認(rèn)為空
                    success: function () {
                        // 用戶確認(rèn)分享后執(zhí)行的回調(diào)函數(shù)
                    },
                    cancel: function () {
                        // 用戶取消分享后執(zhí)行的回調(diào)函數(shù)
                    }
                });
                //QQ
                wx.onMenuShareQQ({
                    title: dataForWeixin.title, // 分享標(biāo)題
                    desc: dataForWeixin.desc, // 分享描述
                    link: dataForWeixin.url, // 分享鏈接
                    imgUrl: dataForWeixin.MsgImg,// 分享圖標(biāo)
                    success: function () {
                        // 用戶確認(rèn)分享后執(zhí)行的回調(diào)函數(shù)
                    },
                    cancel: function () {
                        // 用戶取消分享后執(zhí)行的回調(diào)函數(shù)
                    }
                });
                //QQ微博
                wx.onMenuShareWeibo({
                    title: dataForWeixin.title, // 分享標(biāo)題
                    desc: dataForWeixin.desc, // 分享描述
                    link: dataForWeixin.url, // 分享鏈接
                    imgUrl: dataForWeixin.TLImg, // 分享圖標(biāo)
                    success: function () {
                        // 用戶確認(rèn)分享后執(zhí)行的回調(diào)函數(shù)
                    },
                    cancel: function () {
                        // 用戶取消分享后執(zhí)行的回調(diào)函數(shù)
                    }
                });
                // config信息驗(yàn)證后會(huì)執(zhí)行ready方法，所有接口調(diào)用都必須在config接口獲得結(jié)果之后，config是一個(gè)客戶端的異步操作，
                //所以如果需要在頁(yè)面加載時(shí)就調(diào)用相關(guān)接口，則須把相關(guān)接口放在ready函數(shù)中調(diào)用來(lái)確保正確執(zhí)行。對(duì)于用戶觸發(fā)時(shí)才調(diào)用的接口，則可以直接調(diào)用，不需要放在ready函數(shù)中。
            });
            wx.error(function (res) {
                //alert(res);
                // config信息驗(yàn)證失敗會(huì)執(zhí)行error函數(shù)，如簽名過(guò)期導(dǎo)致驗(yàn)證失敗，具體錯(cuò)誤信息可以打開(kāi)config的debug模式查看，也可以在返回的res參數(shù)中查看，對(duì)于SPA可以在這里更新簽名。
            });
</script>

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