开1, Vim opens the nginx configuration file
vim /usr/local/nginx/conf/nginx.conf
2, find the following paragraph, modify gzip on;gzip_min_length 1k;
gzip_buffers 4 16k;
#gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png;
gzip_vary off;
gzip_disable "MSIE [1-6].";3. ExplainLine 1: Turn on GzipLine 2: No compression threshold, greater than Only 1K is compressed, and generally there is no need to change it. Line 3: buffer is, well, forget it, I won’t explain it, no need to change it Line 4: If a reverse proxy is used, the terminal communication is HTTP/1.0, if necessary You shouldn’t need to read my popular science article; if you have this sentence, just comment it. The default is HTTP/1.1Line 5: Compression level, 1-10. The larger the number, the better the compression and the longer the time. , feel free to change it depending on your moodLine 6: The file type to be compressed, just fill in whatever is missing. There are two ways to write JavaScript, it is best to write them both. There are always people who complain that js files are not compressed. In fact, write one more Just use this formatLine 7: It is related to caching services such as Squid. If it is on, "Vary: Accept-Encoding" will be added to the Header. I don't need this thing. I can figure it out by myself.Line 8 : IE6 is not very friendly to Gzip and does not give it Gzip anymore4. Reload Nginx/usr/local/nginx/sbin/nginx -s reload5. Use curl to test whether Gzip is successfully turned on
Content -Encoding: gzip

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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