IE7
今天整理以前写过的关于上传文件,并显示进度条的程序代码,对该代码进行优化整理。解决了一直困扰的问题:有时进度条没有达到100%,浏览器出现假死现象。在IE8、chrome测试非常完美。
项目需求:
上传APK,显示上传进度条,上传完成开始分析APK,并显示:正在分析apk数据,请稍后... ,分析完成后,显示:上传成功,重新上传
由于我电脑装的是winxp英文版,IE默认的是IE7,在测试的时候发现进度条不显示。百分比也不显示。
排除问题:
1、将DOM改成jquery方式,不显示
2、给递归调用加上延时,不显示。加上延时代码:setTimeout("getProgress('"+upid+"')",500);
3、是否是容器层次问题导致?于是测试是否执行上传期间模块。在页面中随便加个容器,写个全局变量i,在上传期间调用的模块中写入到该容器i++,显示,说明正确调用
4、即然显示,进度条和百分比都为0,是不是接收的json数据有问题?
由于我返回的代码为:echo json_encode($arr); 本身就为json数据,但为了找出原因,将返回的数据在执行一次:var dataObj=eval("("+data+")");//转换为json对象
显示脚本错误。
5、难道是缓存?于是将
复制代码 代码如下:
$.getJSON("ProcessBar.php",{progress_key:upid},function(result){
改为:
复制代码 代码如下:
$.getJSON("ProcessBar.php",{progress_key:upid,time:(new Date()).getTime()},function(result){
完美解决问题。

Absolute session timeout starts at the time of session creation, while an idle session timeout starts at the time of user's no operation. Absolute session timeout is suitable for scenarios where strict control of the session life cycle is required, such as financial applications; idle session timeout is suitable for applications that want users to keep their session active for a long time, such as social media.

The server session failure can be solved through the following steps: 1. Check the server configuration to ensure that the session is set correctly. 2. Verify client cookies, confirm that the browser supports it and send it correctly. 3. Check session storage services, such as Redis, to ensure that they are running normally. 4. Review the application code to ensure the correct session logic. Through these steps, conversation problems can be effectively diagnosed and repaired and user experience can be improved.

session_start()iscrucialinPHPformanagingusersessions.1)Itinitiatesanewsessionifnoneexists,2)resumesanexistingsession,and3)setsasessioncookieforcontinuityacrossrequests,enablingapplicationslikeuserauthenticationandpersonalizedcontent.

Setting the httponly flag is crucial for session cookies because it can effectively prevent XSS attacks and protect user session information. Specifically, 1) the httponly flag prevents JavaScript from accessing cookies, 2) the flag can be set through setcookies and make_response in PHP and Flask, 3) Although it cannot be prevented from all attacks, it should be part of the overall security policy.

PHPsessionssolvetheproblemofmaintainingstateacrossmultipleHTTPrequestsbystoringdataontheserverandassociatingitwithauniquesessionID.1)Theystoredataserver-side,typicallyinfilesordatabases,anduseasessionIDstoredinacookietoretrievedata.2)Sessionsenhances

PHPsessionscanstorestrings,numbers,arrays,andobjects.1.Strings:textdatalikeusernames.2.Numbers:integersorfloatsforcounters.3.Arrays:listslikeshoppingcarts.4.Objects:complexstructuresthatareserialized.

TostartaPHPsession,usesession_start()atthescript'sbeginning.1)Placeitbeforeanyoutputtosetthesessioncookie.2)Usesessionsforuserdatalikeloginstatusorshoppingcarts.3)RegeneratesessionIDstopreventfixationattacks.4)Considerusingadatabaseforsessionstoragei

Session regeneration refers to generating a new session ID and invalidating the old ID when the user performs sensitive operations in case of session fixed attacks. The implementation steps include: 1. Detect sensitive operations, 2. Generate new session ID, 3. Destroy old session ID, 4. Update user-side session information.


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