Top 9 issues in Web front-end performance optimization

1. Please reduce the basic principle of HTTP request:When the browser (client) and the server communication, it has consumed a lot of time, especially when the network situation is worse, this problem is particularly prominent.The process of a

HTML Learning Document-7, HTML link

HTML uses hyperlinks to connect to another document on the network. Links can be found in almost all web pages. Click the link to jump from one page to another.7.1 HTML Hyperlinks (links)① hyperlinks can be a word, a word, or a group of words, or an

Nginx forwarding requests, from HTTPS to HTTP

The domain name of the new project is HTTPS, need to access the company's image server, image Server domain name is HTTP, so do a nginx forwardingserver {Listen 443;SERVER_NAME new project domain name;#include ssl.conf;SSL on;Ssl_certificate keys/1_

Skip NetEase Cloud member download restrictions, in the NetEase Cloud Web page to download

1. First we open NetEase Cloud Music web version, find the song you want to play, click Play, I take xiaojingteng of the bucket of the mainland to give examples2. We first press F12, then press F5 refresh the page click on the following network,

PHP uses zip extension to compress files

In the company encountered a problem, is the use of Zip packaging users upload files, to provide collective download.--The first idea is to use exec to package Linux. But ... exec method, you know, I'm not very willing to use this function.--So the

PHP optimization Acceleration Opcache Use summary (reprint)

Transfer from http://blog.csdn.net/why_2012_gogo/article/details/51134674PHP optimization Acceleration Opcache Usage Summary:Opcache is a way to avoid the overhead of loading and parsing PHP scripts by storing the bytecode that is precompiled by the

File Upload---form form, ajax,jquery

Service-Side program:Import Tornado.webimport osimg_list=[]classIndexhandler (Tornado.web.RequestHandler): DefGet(self): Self.render ('index.html', list_img=img_list) def post (self,*args, * *Kwargs): Name=self.get_argument ('name')

11.18 Apache user authentication 11.19 11.20 domain name jump 11.21 Apache Access log

11.18 Apache user authenticationChange the contents of a virtual hostVim/usr/local/apache2.4/conf/extra/httpd-vhosts.confAdd user name and password? /usr/local/apache2.4/bin/htpasswd-c-m/data/.htpasswd aming-C is the creation of-m specified typeView

Take a look at the log in the flume& collection directory of the Big Data acquisition engine

Welcome to the big Data and AI technical articles released by the public number: Qing Research Academy, where you can learn the night white (author's pen name) carefully organized notes, let us make a little progress every day, so that excellent

11.14/11.15 Apache and PHP combined 11.16/11.17 Apache default virtual Host

11.14/11.15 Apache and PHP combinedWhen you start httpd, there are warning prompts to define the servername in the configuration file.Vim/usr/local/apache2.4/conf/httpd.confEnter/ServerName search to cancel the previous #, enter/ Php5.so Search will

The RTrim () function of the PHP string is used

RTrim (PHP 4, PHP 5, PHP 7) Rtrim-strip whitespace (or other characters) from the end of a string rtrim-Delete whitespace characters (or other characters) at the end of a string DescriptionStringRTrim (String$str [,

Analysis of common debugging methods and common problems in web development

first, the basic principles of Web projectsMost Web projects are now developed and deployed independently of the front and back.The front and back ends are developed independently, and are typically communicated through the Web interface (common

The Addslashes () function of the PHP string is used

Addslashes (PHP 4, PHP 5, PHP 7) Addslashes-quote string with slashes addslashes-referencing strings with backslashes Descriptionaddslashes($str)// Returns a string with backslashes added before characters that

"Notes" NetEase micro-professional-web security Engineer -04.web Security Combat -9.XSS

XSS: Cross site script attack, which we mentioned earlier, refers to an attacker entering (passing in) malicious HTML code into a Web site with an XSS vulnerability, and this HTML code executes automatically when other users browse the site. So as

"Notes" NetEase micro-professional-web security Engineer -04.web Security Combat-3. Command injection

command injection: means to destroy the structure of a command statement by committing a maliciously constructed parameter, thus achieving the purpose of executing a malicious command.In the previous basic course, we mentioned that command injection

Hand-writing your own PHPMVC Framework Example tutorial

1 What is MVCThe MVC pattern (model-view-controller) is a software architecture model in software engineering, which divides the software system into three basic parts: model, view and controller.The purpose of the MVC pattern is to implement a

"Notes" NetEase Micro Professional-web security Engineer -03.web Safety Tools

Course Overview:In web security testing, with the help of the right tools, we can improve our testing efficiency and expand our testing ideas. This lesson will introduce browser and extension, Agent grab packet, sensitive file detection,

HTTP response message Structure

The HTTP response message consists of three parts: Response line, response header, and response body.First, Response Line: protocol version + status code + descriptionCommon Status Codes:100-199: Indicates a successful receive request that requires

Some experiences of browser Automation 7 selenium Webdriver Some questions

1. Download the imageThe link is best, and almost all possible methods are enumerated, except that it does not mention the use of urldownloadtofile, but it is similar to

Pick: a Linux Command Line fuzzy search tool | Linux China, pick fuzzy search

Pick: a Linux Command Line fuzzy search tool | Linux China, pick fuzzy search It allows you to select from a series of options through the ncurses (3X) interface, and also supports fuzzy search. This tool is useful when you want to select a

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