


javascript - Questions about front-end and back-end collaboration
A question suddenly occurred to me.
Will the front-end run the entire project on your own computer, or only the front-end part of the code
If you only have front-end code, don’t you have to use absolute paths when using the back-end interface?
Reply content:
A question suddenly occurred to me.
Will the front-end run the entire project on your own computer, or only the front-end part of the code
If you only have front-end code, don’t you have to use absolute paths when using the back-end interface?
Currently the more popular development method is the separation and collaboration of front-end and back-end:
On the whole, the front-end and back-end codes are still placed in the same project, but during the development process, they have complementary influences;
In the early stage of development, first determine the requirements, and then define the required interface data;
During the development process, the front-end simulates the real operating environment by mocking data according to the defined interface; the back-end should also have corresponding restfull interface testing tools, so there is no need to worry about this;
After the self-test is completed, call the real back-end interface for joint debugging testing;
Generally, there are two ways to display a page
One is to adjust the back-end method to process data and then render the page, and the other is to execute the front-end code and use js to request data
If you are accessing the same project, you can use relative paths, otherwise use absolute uri paths
We basically only have the front part of the code on our own computers.
Of course, in this case, there will be cross-domain problems when communicating with the server.
Chrome has a plug-in cors that allows cross-domain use.
The path is what you need. The IP address + interface path of the adjusted server code
Now we usually set up a test server, and the front-end and back-end upload the written modules to the test server for running tests according to the development progress. In this way, they are actually written locally and run on the server, so you will say that they need to be modified and uploaded every time. It’s not very annoying. Sublime text has a plug-in like SFTP, which automatically uploads modifications, so everyone’s code is unified on the test server. After the test passes, the test server code is transferred to the main server
The code in the front-end part is written as basepath. This value is obtained by reading the configuration file when the project is started. Just assign it the address of the server. Cross-domain problems can be solved using cors-filter and java-property-utils in web.xml configuration

In PHP, you can use session_status() or session_id() to check whether the session has started. 1) Use the session_status() function. If PHP_SESSION_ACTIVE is returned, the session has been started. 2) Use the session_id() function, if a non-empty string is returned, the session has been started. Both methods can effectively check the session state, and choosing which method to use depends on the PHP version and personal preferences.

Sessionsarevitalinwebapplications,especiallyfore-commerceplatforms.Theymaintainuserdataacrossrequests,crucialforshoppingcarts,authentication,andpersonalization.InFlask,sessionscanbeimplementedusingsimplecodetomanageuserloginsanddatapersistence.

Managing concurrent session access in PHP can be done by the following methods: 1. Use the database to store session data, 2. Use Redis or Memcached, 3. Implement a session locking strategy. These methods help ensure data consistency and improve concurrency performance.

PHPsessionshaveseverallimitations:1)Storageconstraintscanleadtoperformanceissues;2)Securityvulnerabilitieslikesessionfixationattacksexist;3)Scalabilityischallengingduetoserver-specificstorage;4)Sessionexpirationmanagementcanbeproblematic;5)Datapersis

Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Dreamweaver Mac version
Visual web development tools

SublimeText3 English version
Recommended: Win version, supports code prompts!

SublimeText3 Mac version
God-level code editing software (SublimeText3)

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

Zend Studio 13.0.1
Powerful PHP integrated development environment
