WeChatSubscript是項目UI層javascript
WeChatTools是封裝操做訪問公衆號接口的一些方法類庫css
咱們要的獲得AccessToken,這是全部接口訪問的基礎,咱們看看官方給出的接口調用文檔html
很簡單明瞭,grant_type=client_credential,這是固定的不會變java
appid與secret就是前面一章我叫你們記起來的那個認證口令數據。ajax
下邊咱們來實現這個功能,新建WeCharBase.csapi
1 public class WeCharBase 2 { 3 private static readonly string appId; 4 private static readonly string appSecret; 5 6 static WeCharBase() 7 { 8 appId = "**********"; 9 appSecret = "832090bfddabbac19cc8da5053aea47b"; 10 } 11 12 public static string AccessToken 13 { 14 get { return GetAccessToken(); } 15 } 16 17 /// <summary>獲取access_token</summary> 18 /// <param name="appId"></param> 19 /// <param name="appSecret"></param> 20 /// <returns></returns> 21 private static string GetAccessToken() 22 { 23 if (HttpContext.Current == null) 24 { 25 return GetToken(); 26 } 27 28 var accessTokenCache = HttpContext.Current.Cache["access_token"]; 29 if (accessTokenCache != null) 30 { 31 return accessTokenCache.ToString(); 32 } 33 else 34 { 35 return GetToken(); 36 } 37 } 38 39 /// <summary>獲取ccess_token</summary> 40 /// <returns></returns> 41 private static string GetToken() 42 { 43 try 44 { 45 var client = new WebClient(); 46 client.Encoding = Encoding.UTF8; 47 var responseData = client.DownloadString(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appId, appSecret)); 48 49 var javaScriptSerializer = new JavaScriptSerializer(); 50 var accessDictionary = javaScriptSerializer.Deserialize<Dictionary<string, object>>(responseData); 51 var accessToken = accessDictionary["access_token"]; 52 if (accessToken == null) 53 { 54 return string.Empty; 55 } 56 57 HttpContext.Current.Cache.Insert("access_token", accessToken, null, DateTime.Now.AddSeconds(7100), TimeSpan.Zero, CacheItemPriority.Normal, null); 58 HttpContext.Current.Cache.Remove("ticket"); 59 GetTicket(); 60 61 return accessToken.ToString(); 62 } 63 catch (Exception ex) 64 { 65 return ex.Message; 66 } 67 } 68 }
細心的童鞋功能注意到這裏用了HttpContext.Current.Cache,爲何呢?緩存
由於access_token在官方服務器會緩存2個小時,請求一次,這個access_token在2個小時內都有效服務器
因此請求一次獲得access_token後,在之後的2個小時內均可以用這個access_token去訪問其餘接口微信
因此沒有必要每次請求不一樣的接口都請求access_token一次app
咱們新建控制器SubscriptController.cs
新增2個Action,ViewAccessToken
/// <summary>獲取AccessToken</summary> /// <returns></returns> public ActionResult ViewAccessToken() { return View(); } /// <summary>獲取AccessToken</summary> /// <returns></returns> public ActionResult GetAccessToken() { return Content(WeCharBase.AccessToken); }
新增視圖
<script type="text/javascript" language="javascript"> $(document).ready(function () { $("#btnGetAccessToken").click(function () { $.ajax({ type: "Get", url: "/Subscript/GetAccessToken", success: function (responseTest) { $("#txtAccessToken").text(responseTest); } }); }); }); </script> <table> <tr> <td> <div class="title">獲取access token</div> <textarea id="txtAccessToken" name="txtAccessToken" rows="4" style="width:500px"></textarea> </td> <td><input class="btncss" id="btnGetAccessToken" type="button" value=" 獲取 " /></td> </tr> </table>
成功了,是否是很簡單呀