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頁數 49 / 56 上一頁 下一頁
各瀏覽器中cookie個數和大小限制

各瀏覽器中cookie個數和大小限制

 
 
 
 
 
 

一、瀏覽器允許每個域名所包含的cookie數
Microsoft指出InternetExplorer8增加cookie限制為每個域名50個,但IE7似乎也允許每個域名50個cookie。
Firefox每個域名cookie限制為50個。
Opera每個域名cookie限制為30個。
Safari/WebKit似乎沒有cookie限制。但是如果cookie很多,則會使header大小超過服務器的處理的限制,會導致錯誤發生。

二、當很多的cookie被設置,瀏覽器如何處理
除了Safari (可以設置全部cookie,不管數量多少),有兩個方法:
最少最近使用(leastrecentlyused(LRU))的方法:當cookie已達到限額,自動踢除最老的cookie,以使給最新的cookie一些空間。 InternetExplorer和Opera使用此方法。
Firefox很獨特:雖然最後的設置的cookie始終保留,但似乎隨機決定哪些cookie被保留。似乎沒有任何計劃(建議:在Firefox中不要超過cookie限制)。

三、不同瀏覽器的cookie總大小也不同
Firefox和Safari允許cookie多達4097個字節,包括名(name)、值(value)和等號。
Opera允許cookie多達4096個字節,包括:名(name)、值(value)和等號。
InternetExplorer允許cookie多達4095個字節,包括:名(name)、值(value)和等號。
註:多字節字符計算為兩個字節。在所有瀏覽器中,任何cookie大小超過限制都被忽略,且永遠不會被設置。

某網站的實測結果 http://www.ruslog.com/tools/cookies.html

Browser Max Cookies Max Size Per Cookie Max Size Per Domain1 Usage2
Chrome 4        
Chrome 5 70 4096 bytes NA  
Chrome 6 70 4096 bytes NA  
Chrome 7 70 4096 bytes NA  
Chrome 8 180 4096 bytes NA 0.6%
Chrome 9       7.7%
Chrome 10 180 4096 bytes NA 14.8%
Chrome 11       0.8%
Chrome 12       0.1%
FireFox 2 50 4097 characters NA  
FireFox 3 50 4097 characters NA 36.7%
FireFox 4 50 4098 characters NA 5.2%
IE 6 50 4096 characters 4096 characters 3.0%
IE 7 50 4095 characters 4095 characters 5.4%
IE 8 50 5117 characters 10234 characters 16.3%
IE 9       1.1%
Opera 8 30 4096 bytes 4096 bytes  
Opera 9 30 4096 bytes 4096 bytes  
Opera 10       0.2%
Opera 11 60 4096 bytes 4096 bytes 1.9%
Safari 3       0.1%
Safari 4       0.3%
Safari 5 600 4096 bytes 4096 bytes 3.6%
Safari on mac3 ? ? ?  


但是都找不到 IE9 的限制..
More...
Bike, 2012/7/11 下午 12:21:42
MSSQL Deadlock 分析
http://www.simple-talk.com/sql/learn-sql-server/how-to-track-down-deadlocks-using-sql-server-2005-profiler/

寫的還仔細的
More...
瞇瞇, 2012/6/26 上午 09:32:10
網頁端不同時區之時間顯示

由於網站的user來自全世界各地,而我們網站產生的時間卻是Server的時間
因此需要使用javascript來做一些轉換,讓user看到是他當地的時間

1. Server端產生具有時區的時間字串,用特定的span + class把它包起來, 時間格式 DateTime.ToUniversalTime().ToString("r")
     
<span class="timeString">Fri, 31 Aug 2012 10:57:04 GMT</span>

2. Client端利用jQuery於網頁load的時候將所有時間轉換成當地時間
    這個地方我用了  date.format.js 來轉換成當地時間 (參考  http://blog.stevenlevithan.com/archives/date-time-format  )
   

     $(".timeString").each(function () {
            var content = $(this).text();
            var d = new Date(content);
            if (!isNaN(d)) $(this).text(d.format("yyyy-mm-dd hh:MM tt"));
        }); 
   

這樣user看到的時間就不會錯了
More...
darren, 2012/6/19 下午 04:14:57
把 Data 轉為 SQL Script (SQL 2008 的功能)
1. 在要匯出的 DB 上, 按右鍵, 選取工作 -->  產生令碼.

 

2. 歡迎頁

 


 3. 選取資料庫
 

4. 設定選項, 記得要選取 "編寫資料的指令碼"
 

5. 選取資料表
 

6. 選擇要匯出的資料表
 

7. 指定 Script 要儲存的位置
 

8. 檢視摘要
 

9. 完工
More...
Bike, 2012/6/19 上午 11:11:33
使用 Net.WebRequest 出現 ''已經嘗試太多次自動重新導向'' 的解決方法

當使用 WebRequest 來 Get 網址時,出現"已經嘗試太多次自動重新導向"。

通常為對方網站有進行某種判斷。以下為試過的項目。

上次是將 CookieContainer 設定一個 New Net.CookieContainer 即可。

            Dim http As Net.HttpWebRequest = Net.WebRequest.Create(Url)
            http.Method = "GET"
            http.ContentType = "application/x-www-form-urlencoded;"

            http.UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Win64; x64; Trident/5.0)"
            http.CookieContainer = New Net.CookieContainer
            http.Referer = Url

More...
Jerry, 2012/6/18 下午 07:54:03
Template 中新增 IsDefaultNewVersion
IsDefaultNewVersion 設為 true 時, 要改用 { } 來標記變數.
More...
Bike, 2012/6/14 下午 06:53:43
VS2010 中, 在方案總管和編輯的檔案同步 (在方案總管中追蹤現用項目)
有時 VS2010 會不知原因的方案總管不會自動移到目前編輯的檔案的位置, 有點不方便. 要改回同步, 可以勾選 "在方案總管中追蹤現用項目", 如下圖:

要重開 Visual Studio 才會生效。

More...
Bike, 2012/6/14 下午 04:42:37
ENum 傳回數值
Int32 a= (int) EN.Type.XXX;
篇幅好像太少 ~~~~~~~~~
More...
瞇瞇, 2012/6/14 上午 12:23:55
新增防止駭客的功能
在 Application_BeginRequest 可以加入 BlockHacker

    void Application_BeginRequest(object sender, EventArgs e)
    {
        UW.WU.BlockHacker();
    }

 

可以做一些基本的防駭.

在 Sys_Coonfig 中有兩個參數要設定: WEB_ERROR_ExceptionCountBeforeBlock, WEB_ERROR_ExceptionCountingIntervalInMinutes

另外還有一個參數: WEB_ERROR_DangerousKeywords, 內容請用逗號分隔, 若是發生 Exception 時, Form 或 QueryString 中含有指定的文字, 收到的警告信會標示為高重要性.
More...
Bike, 2012/6/9 上午 09:06:25
global.asax 的事件
從 http://blog.ie-soft.de/post/2007/12/globalasax-events.aspx  抄來的. 留作參考

HttpApplication Events:

Application_AcquireRequestState
Occurs when ASP.NET acquires the current state (for example, session state) that is associated with the current request. 

Application_AuthenticateRequest
Occurs when a security module has established the identity of the user. 

Application_AuthorizeRequest
Occurs when a security module has verified user authorization. 

Application_BeginRequest
Occurs as the first event in the HTTP pipeline chain of execution when ASP.NET responds to a request. 

Application_Disposed
Adds an event handler to listen to the Disposed event on the application. 

Application_EndRequest
Occurs as the last event in the HTTP pipeline chain of execution when ASP.NET responds to a request. 

Application_Error
Occurs when an unhandled exception is thrown. 

Application_PostAcquireRequestState
Occurs when the request state (for example, session state) that is associated with the current request has been obtained. 

Application_PostAuthenticateRequest
Occurs when a security module has established the identity of the user. 

Application_PostAuthorizeRequest
Occurs when the user for the current request has been authorized. 

Application_PostMapRequestHandler
Occurs when ASP.NET has mapped the current request to the appropriate event handler. 

Application_PostReleaseRequestState
Occurs when ASP.NET has completed executing all request event handlers and the request state data has been stored. 

Application_PostRequestHandlerExecute
Occurs when the ASP.NET event handler (for example, a page or an XML Web service) finishes execution. 

Application_PostResolveRequestCache
Occurs when ASP.NET bypasses execution of the current event handler and allows a caching module to serve a request from the cache. 

Application_PostUpdateRequestCache
Occurs when ASP.NET completes updating caching modules and storing responses that are used to serve subsequent requests from the cache. 

Application_PreRequestHandlerExecute
Occurs just before ASP.NET begins executing an event handler (for example, a page or an XML Web service). 

Application_PreSendRequestContent
Occurs just before ASP.NET sends content to the client. 

Application_PreSendRequestHeaders
Occurs just before ASP.NET sends HTTP headers to the client. 

Application_ReleaseRequestState
Occurs after ASP.NET finishes executing all request event handlers. This event causes state modules to save the current state data. 

Application_ResolveRequestCache
Occurs when ASP.NET completes an authorization event to let the caching modules serve requests from the cache, bypassing execution of the event handler (for example, a page or an XML Web service). 

Application_UpdateRequestCache
Occurs when ASP.NET finishes executing an event handler in order to let caching modules store responses that will be used to serve subsequent requests from the cache. 

Application_Init
This method occurs after _start and is used for initializing code. 

Application_Start
As with traditional ASP, used to set up an application environment and only called when the application first starts.

Application_End
Again, like classic ASP, used to clean up variables and memory when an application ends.

Session Events:

Session_Start
As with classic ASP, this event is triggered when any new user accesses the web site.

Session_End
As with classic ASP, this event is triggered when a user's session times out or ends. Note this can be 20 mins (the default session timeout value) after the user actually leaves the site.

Profile Events:

Profile_MigrateAnonymous
Occurs when the anonymous user for a profile logs in.

Passport Events:

PassportAuthentication_OnAuthenticate
Raised during authentication. This is a Global.asax event that must be named PassportAuthentication_OnAuthenticate.
 

Possibly more events defined in other HttpModules like:

System.Web.Caching.OutputCacheModule
System.Web.SessionState.SessionStateModule
System.Web.Security.WindowsAuthentication
System.Web.Security.FormsAuthenticationModule
System.Web.Security.PassportAuthenticationModule
System.Web.Security.UrlAuthorizationModule
System.Web.Security.FileAuthorizationModule
System.Web.Profile.ProfileModule

More...
Bike, 2012/6/9 上午 08:55:08
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