Camel2243.com Website Review

Before writing the history of tears of Nightw*tch.js, there is a need for a moment ago to use Nightw*tch.js to test the speed of each browser. Therefore, it is expected that each session opened is a clean session (do not have cache, cookie, etc...) In this record, how to set each driver to open each time is a new session pre-extension: This article uses internet explorer , ja*ascriptEnabled: true, acceptSslCerts: true, ie.ensureCleanSession: true } } After reopening the computer, the terminal has been spraying the following error nvm is not compatible with the npm config prefix option: currently Set PATH ran away, check the information, record how to solve nvm uninstall v5.7. 1 && nvm install v5.7.1 Usually a version of the previous article introduced http about the cache header, but how does it work when the cache expires or needs revalidate? This article will introduce several common revalidate Http header Last-Modified, If-Modified-Since (RFC 7232) request If-Modified-Since: The last time the Last-Modifed return was used to make a revalidate, check if the file has been changed after the specified time. There are 200 back and new file contents, otherwise 304 (Not Modified) can be returned. Response: Last-Modified: The time the file was last modified at the server. The response brings back the timestamp that was sent when the file was last modified at the time the server was revalidate. The actual usage scenario would be like the following steps: client sends request and server to image.png file server return Cache-Control: When optimizing web page speed, the cache mechanism is often used to reduce server load and client resource wait time. For example, the server will have a cdn service in front of it, cache some static files... and so on. The server may use redis, the cache needs to do a lot of calculations to reduce the load. This is to introduce which http header can be used on the client side (browser) to optimize the page speed, check whether there is a successful cache. You can refer to this article Expires first appeared in http 1.0