基於C#後台調用跨域MVC服務及帶Cookie驗證的實現

來源:互聯網
上載者:User

背景
隨著富用戶端架構的盛行,以及眾多優秀的前端js架構,很多情況我們會遇到跨域的問題,而js的ajax請求是不允許直接跨域訪問的,當然你會說可以用JSONP等,但是由於代碼潔癖,不想在前端和後台添加callback,而且很多情況你是無法控制的,需要牽連考慮太多的情況。

所以我直接繞過了,每個前端應用,內建一個通用後端服務代理,該服務解決跨域問題,自動代理幫前台擷取跨域的資料。

如何算跨域
雖然是個老問題,但是還是要提醒注意下兩點:同IP,不同連接埠,資料訪問是跨域的,但是Cookie訪問是可以的(這個讓我很難理解)

解決,源碼

複製代碼 代碼如下:    CookieContainer cookieContainer = new CookieContainer();

     [HttpPost]
public string CommonPost(string url)
{
log.Info(CookieHelper.GetCookie("ITDC_UserName") + "進入方法CommonPost Url=" + url);
Uri address = new Uri(System.Configuration.ConfigurationManager.AppSettings["RESTfulAPI"].ToString() + url);
HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
       //遠程服務,需要加入cookie驗證
cookieContainer.Add(address, GetCookie("ITDC_UserName"));
cookieContainer.Add(address, GetCookie("ITDC_UserRole"));
request.CookieContainer = cookieContainer;
StringBuilder data = new StringBuilder();
for (int i = 0; i < Request.QueryString.Count; i++)
{
if (Request.QueryString.Keys[i].ToString() == "url") continue;
data.Append("&" + Request.QueryString.Keys[i].ToString() + "=" + Request.QueryString[i].ToString());
}
// Create a byte array of the data we want to send
byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString().TrimStart('&'));
// Set the content length in the request headers
request.ContentLength = byteData.Length;
// Write data
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(byteData, 0, byteData.Length);
}
string result = "";
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(response.GetResponseStream());
result = reader.ReadToEnd();
}
log.Info(CookieHelper.GetCookie("ITDC_UserName") + " 執行完成 CommonPost Url=" + url);
return (result);
}

前台調用
複製代碼 代碼如下:Ext.Ajax.request({url: APIUrl + '/Nebula/CommonPost?url=/Nebula/PostComment/&KlId=1&Msg=ok&Author=admin&Title=文章標題',
method: "POST",
success: function (response) {
Ext.Viewport.unmask();
var obj = Ext.decode(response.responseText);
Ext.Msg.alert("提示", obj.Msg, Ext.emptyFn);
},
failure: function (response) {
Ext.Viewport.unmask();
Ext.Msg.alert("提示", "操作失敗,請檢查網路!", Ext.emptyFn);
}
});

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