公眾平台用戶提交信息後，微信服務器將發送GET請求到填寫的URL上，並且帶上四個參數：
開發者通過檢驗signature對請求進行校驗（下面有校驗方式）。若確認此次GET請求來自微信服務器，請原樣返回echostr參數內容，則接入生效，否則接入失敗。
signature結合了開發者填寫的token參數和請求中的timestamp參數、nonce參數。
加密/校驗流程：
/// <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三個參數進行字典序排序
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());
// 將sha1加密後的字符串可與signature對比，標識該請求來源於微信
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();
}
接入後是消息推送當普通微信用戶向公眾賬號發消息時，微信服務器將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"];
// 隨機數
string nonce = Request.QueryString["nonce"];
// 隨機字符串
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, "謝謝您的關注！,"));
}
// 取消訂閱
else if (eventType==ReqEventType.Unsubscribe)
{
// TODO 取消訂閱後用戶再收不到公眾號發送的消息，因此不需要回復消息
}
// 自定義菜單點擊事件
else if (eventType==ReqEventType.CLICK)
{
// TODO 自定義菜單權沒有開放，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"];
// 隨機數
string nonce = Request.QueryString["nonce"];
// 隨機字符串
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, "謝謝您的關注！,"));
}
// 取消訂閱
else if (eventType==ReqEventType.Unsubscribe)
{
// TODO 取消訂閱後用戶再收不到公眾號發送的消息，因此不需要回復消息
}
// 自定義菜單點擊事件
else if (eventType==ReqEventType.CLICK)
{
// TODO 自定義菜單權沒有開放，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微信開發教程匯總》，歡迎大家學習閱讀。
以上就是關於ASP.NET微信開發接口指南的相關內容介紹，希望對大家的學習有所幫助。
