使用的是comet的技术,一个“长连接” ajax请求60秒请求就会超时 重新发起一个ajax
这个ajax请求能在console中隐藏吗?
一般的网站这个请求好像都看不到,是怎么做到的?
回复内容:
使用的是comet的技术,一个“长连接” ajax请求60秒请求就会超时 重新发起一个ajax
这个ajax请求能在console中隐藏吗?
一般的网站这个请求好像都看不到,是怎么做到的?
https://github.com/walkor/web-msg-sender
web推送可以看下这个,非ajax,console中看不到
如果是xhr请求
,console开启log的情况下,无论如何都不可能不显示出来
不过用jsonp
的方式实现就看不到了,因为它不是一个xhr请求,而是动态加载一个script标签
注意不要直接用jQuery
的jsonp实现,因为你的接口本来是ajax方式
实现的,那么说明肯定是同源的请求
,如果直接改成jQuery的jsonp
,实质上还是通过xhr
发出的,jQuery对同源jsonp
做了特殊处理,并不是按照动态添加script标签
的方式进行的
websocket
. 第一次看得见,以后都看不见。
短链接 肯定都可以看到 ,可以试试websocket IE10一下不支持

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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