公眾平臺用戶提交信息后,微信服務(wù)器將發(fā)送GET請求到填寫的URL上,并且?guī)纤膫€參數(shù):
開發(fā)者通過檢驗signature對請求進(jìn)行校驗(下面有校驗方式)。若確認(rèn)此次GET請求來自微信服務(wù)器,請原樣返回echostr參數(shù)內(nèi)容,則接入生效,否則接入失敗。
signature結(jié)合了開發(fā)者填寫的token參數(shù)和請求中的timestamp參數(shù)、nonce參數(shù)。
加密/校驗流程:
- 1. 將token、timestamp、nonce三個參數(shù)進(jìn)行字典序排序
- 2. 將三個參數(shù)字符串拼接成一個字符串進(jìn)行sha1加密
- 3. 開發(fā)者獲得加密后的字符串可與signature對比,標(biāo)識該請求來源于微信
/// summary>
/// 驗證簽名
/// /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 };
// 將token、timestamp、nonce三個參數(shù)進(jìn)行字典序排序
Array.SortString>(arr);
StringBuilder content = new StringBuilder();
for (int i = 0; i arr.Length; i++)
{
content.Append(arr[i]);
}
String tmpStr = SHA1_Encrypt(content.ToString());
// 將sha1加密后的字符串可與signature對比,標(biāo)識該請求來源于微信
return tmpStr != null ? tmpStr.Equals(signature) : false;
}
/// summary>
/// 使用缺省密鑰給字符串加密
/// /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();
}
接入后是消息推送當(dāng)普通微信用戶向公眾賬號發(fā)消息時,微信服務(wù)器將POST該消息到填寫的URL上。
protected void Page_Load(object sender, EventArgs e)
{
if (Request.HttpMethod.ToUpper() == "GET")
{
// 微信加密簽名
string signature = Request.QueryString["signature"];
// 時間戳
string timestamp = Request.QueryString["timestamp"];
// 隨機(jī)數(shù)
string nonce = Request.QueryString["nonce"];
// 隨機(jī)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>
/// 處理微信發(fā)來的請求
/// /summary>
/// param name="xml">/param>
public void processRequest(String xml)
{
try
{
// xml請求解析
Hashtable requestHT = WeixinServer.ParseXml(xml);
// 發(fā)送方帳號(open_id)
string fromUserName = (string)requestHT["FromUserName"];
// 公眾帳號
string toUserName = (string)requestHT["ToUserName"];
// 消息類型
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)
{
// 事件類型
String eventType = (string)requestHT["Event"];
// 訂閱
if (eventType==ReqEventType.Subscribe)
{
Response.Write(GetMainMenuMessage(toUserName, fromUserName, "謝謝您的關(guān)注!,"));
}
// 取消訂閱
else if (eventType==ReqEventType.Unsubscribe)
{
// TODO 取消訂閱后用戶再收不到公眾號發(fā)送的消息,因此不需要回復(fù)消息
}
// 自定義菜單點擊事件
else if (eventType==ReqEventType.CLICK)
{
// TODO 自定義菜單權(quán)沒有開放,暫不處理該類消息
}
}
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")
{
// 微信加密簽名
string signature = Request.QueryString["signature"];
// 時間戳
string timestamp = Request.QueryString["timestamp"];
// 隨機(jī)數(shù)
string nonce = Request.QueryString["nonce"];
// 隨機(jī)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>
/// 處理微信發(fā)來的請求
/// /summary>
/// param name="xml">/param>
public void processRequest(String xml)
{
try
{
// xml請求解析
Hashtable requestHT = WeixinServer.ParseXml(xml);
// 發(fā)送方帳號(open_id)
string fromUserName = (string)requestHT["FromUserName"];
// 公眾帳號
string toUserName = (string)requestHT["ToUserName"];
// 消息類型
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)
{
// 事件類型
String eventType = (string)requestHT["Event"];
// 訂閱
if (eventType==ReqEventType.Subscribe)
{
Response.Write(GetMainMenuMessage(toUserName, fromUserName, "謝謝您的關(guān)注!,"));
}
// 取消訂閱
else if (eventType==ReqEventType.Unsubscribe)
{
// TODO 取消訂閱后用戶再收不到公眾號發(fā)送的消息,因此不需要回復(fù)消息
}
// 自定義菜單點擊事件
else if (eventType==ReqEventType.CLICK)
{
// TODO 自定義菜單權(quán)沒有開放,暫不處理該類消息
}
}
else if (msgType == ReqMsgType.Location)
{
}
}
catch (Exception e)
{
}
}/pre>br>
pre>/pre>
br>
br>
本文已被整理到了《ASP.NET微信開發(fā)教程匯總》,歡迎大家學(xué)習(xí)閱讀。
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