ASP.NET微信开发(接口指南)
程序员文章站
2023-12-18 15:59:34
公众平台用户提交信息后,微信服务器将发送get请求到填写的url上,并且带上四个参数:
开发者通过检验signature对请求进行校验(下面有校验方式)。若确认此次g...
公众平台用户提交信息后,微信服务器将发送get请求到填写的url上,并且带上四个参数:
开发者通过检验signature对请求进行校验(下面有校验方式)。若确认此次get请求来自微信服务器,请原样返回echostr参数内容,则接入生效,否则接入失败。
signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
加密/校验流程:
- 1. 将token、timestamp、nonce三个参数进行字典序排序
- 2. 将三个参数字符串拼接成一个字符串进行sha1加密
- 3. 开发者获得加密后的字符串可与signature对比,标识该请求来源于微信
/// <summary> /// 验证签名 /// </summary> /// <param name="signature"></param> /// <param name="timestamp"></param> /// <param name="nonce"></param> /// <returns></returns> public static bool checksignature(string signature, string timestamp, string nonce) { string[] arr = new string[] { token, timestamp, nonce }; // 将token、timestamp、nonce三个参数进行字典序排序 array.sort<string>(arr); stringbuilder content = new stringbuilder(); for (int i = 0; i < arr.length; i++) { content.append(arr[i]); } string tmpstr = sha1_encrypt(content.tostring()); // 将sha1加密后的字符串可与signature对比,标识该请求来源于微信 return tmpstr != null ? tmpstr.equals(signature) : false; } /// <summary> /// 使用缺省密钥给字符串加密 /// </summary> /// <param name="source_string"></param> /// <returns></returns> public static string sha1_encrypt(string source_string) { byte[] strres = encoding.default.getbytes(source_string); hashalgorithm isha = new sha1cryptoserviceprovider(); strres = isha.computehash(strres); stringbuilder entext = new stringbuilder(); foreach (byte ibyte in strres) { entext.appendformat("{0:x2}", ibyte); } return entext.tostring(); }
接入后是消息推送当普通微信用户向公众账号发消息时,微信服务器将post该消息到填写的url上。
protected void page_load(object sender, eventargs e) { if (request.httpmethod.toupper() == "get") { // 微信加密签名 string signature = request.querystring["signature"]; // 时间戳 string timestamp = request.querystring["timestamp"]; // 随机数 string nonce = request.querystring["nonce"]; // 随机字符串 string echostr = request.querystring["echostr"]; if (weixinserver.checksignature(signature, timestamp, nonce)) { response.write(echostr); } } else if (request.httpmethod.toupper() == "post") { streamreader stream = new streamreader(request.inputstream); string xml = stream.readtoend(); processrequest(xml); } } /// <summary> /// 处理微信发来的请求 /// </summary> /// <param name="xml"></param> public void processrequest(string xml) { try { // xml请求解析 hashtable requestht = weixinserver.parsexml(xml); // 发送方帐号(open_id) string fromusername = (string)requestht["fromusername"]; // 公众帐号 string tousername = (string)requestht["tousername"]; // 消息类型 string msgtype = (string)requestht["msgtype"]; //文字消息 if (msgtype == reqmsgtype.text) { // response.write(str); string content = (string)requestht["content"]; if(content=="1") { // response.write(str); response.write(getnewsmessage(tousername, fromusername)); return; } if (content == "2") { response.write(getuserblogmessage(tousername, fromusername)); return; } if (content == "3") { response.write(getgroupmessage(tousername, fromusername)); return; } if (content == "4") { response.write(getwinepartymessage(tousername, fromusername)); return; } response.write(getmainmenumessage(tousername, fromusername, "你好,我是vinehoo,")); } else if (msgtype == reqmsgtype.event) { // 事件类型 string eventtype = (string)requestht["event"]; // 订阅 if (eventtype==reqeventtype.subscribe) { response.write(getmainmenumessage(tousername, fromusername, "谢谢您的关注!,")); } // 取消订阅 else if (eventtype==reqeventtype.unsubscribe) { // todo 取消订阅后用户再收不到公众号发送的消息,因此不需要回复消息 } // 自定义菜单点击事件 else if (eventtype==reqeventtype.click) { // todo 自定义菜单权没有开放,暂不处理该类消息 } } else if (msgtype == reqmsgtype.location) { } } catch (exception e) { } }<pre name="code" class="csharp"> protected void page_load(object sender, eventargs e) { if (request.httpmethod.toupper() == "get") { // 微信加密签名 string signature = request.querystring["signature"]; // 时间戳 string timestamp = request.querystring["timestamp"]; // 随机数 string nonce = request.querystring["nonce"]; // 随机字符串 string echostr = request.querystring["echostr"]; if (weixinserver.checksignature(signature, timestamp, nonce)) { response.write(echostr); } } else if (request.httpmethod.toupper() == "post") { streamreader stream = new streamreader(request.inputstream); string xml = stream.readtoend(); processrequest(xml); } } /// <summary> /// 处理微信发来的请求 /// </summary> /// <param name="xml"></param> public void processrequest(string xml) { try { // xml请求解析 hashtable requestht = weixinserver.parsexml(xml); // 发送方帐号(open_id) string fromusername = (string)requestht["fromusername"]; // 公众帐号 string tousername = (string)requestht["tousername"]; // 消息类型 string msgtype = (string)requestht["msgtype"]; //文字消息 if (msgtype == reqmsgtype.text) { // response.write(str); string content = (string)requestht["content"]; if(content=="1") { // response.write(str); response.write(getnewsmessage(tousername, fromusername)); return; } if (content == "2") { response.write(getuserblogmessage(tousername, fromusername)); return; } if (content == "3") { response.write(getgroupmessage(tousername, fromusername)); return; } if (content == "4") { response.write(getwinepartymessage(tousername, fromusername)); return; } response.write(getmainmenumessage(tousername, fromusername, "你好,我是vinehoo,")); } else if (msgtype == reqmsgtype.event) { // 事件类型 string eventtype = (string)requestht["event"]; // 订阅 if (eventtype==reqeventtype.subscribe) { response.write(getmainmenumessage(tousername, fromusername, "谢谢您的关注!,")); } // 取消订阅 else if (eventtype==reqeventtype.unsubscribe) { // todo 取消订阅后用户再收不到公众号发送的消息,因此不需要回复消息 } // 自定义菜单点击事件 else if (eventtype==reqeventtype.click) { // todo 自定义菜单权没有开放,暂不处理该类消息 } } else if (msgtype == reqmsgtype.location) { } } catch (exception e) { } }</pre><br> <pre></pre> <br> <br>
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