10 recommended articles about agency

Proxy type (proxy): transparent proxy, anonymous proxy, confusing proxy and high-anonymity proxy. Here is some knowledge about using proxy by python crawler, and a proxy pool class. It is convenient for everyone to deal with various complex crawling problems at work. . The urllib module uses a proxy. urllib/urllib2 uses a proxy. It is troublesome to use a proxy. You need to build a ProxyHandler class first, then use this class to build the opener class that opens the web page, and then install the opener in the request. The proxy format is "http:// 127.0.0.1:80", if you want the account password is "http://user:password@127.0.0.1:80".proxy="http://127.0.0.1:80" #Create a ProxyHandler object proxy_support=urllib.request.ProxyHandler({'http

1. Detailed explanation of how Python crawlers use proxy proxy to crawl web pages

Introduction: Proxy type (proxy): transparent proxy, anonymous proxy, obfuscated proxy and high-anonymity proxy. Here is some knowledge about how python crawlers use proxies, and there is also a proxy pool. The class is convenient for everyone to deal with

2. Overview IE and SQL2k develop an XML chat program

Introduction: Years of competition between different browsers have led to the creation of many tools to help developers complete tasks that were previously difficult to do. Now, with a small piece of script, you can create one. The application binds data to the user control so that it can communicate with the server through an embedded proxy type control

##3. C# Example of asynchronously calling the proxy class. Code details

Introduction: Asynchronously calling the proxy class AsyncInvokeProxy.csusing System;using System.Collections.Generic; using System.Linq;using System.Text;using System.Threading;namespace AsyncInvokeDemo{ public class

4. 10.Java Basics - Agent

Introduction: Basic concept - provide a proxy object for an object, and the proxy object controls access to the original object, that is, the client It does not directly control the original object, but indirectly controls the original object through the proxy object. Generally speaking, it is like buying a train ticket. Originally, we needed a train station to buy the ticket. Now we have set up a ticket sales point, and you can buy it directly through the ticket sales point. Got the ticket. The implementation of the proxy can be divided into static proxy and dynamic proxy; dynamic proxy is divided into JDK dynamic proxy and CLGIB dynamic proxy. Static proxy observation code can find that each proxy class can only serve one interface, so the program starts.

5. In-depth understanding of java dynamic proxy

Introduction: The agent pattern is a commonly used Java design pattern. Its characteristic is that the agent class and the delegate class have the same interface. The agent class is mainly responsible for preprocessing messages for the delegate class, filtering messages, forwarding messages to the delegate class, and afterwards Process messages etc. There is usually an association between a proxy class and a delegate class. An object of a proxy class is associated with an object of a delegate class. The object of the proxy class itself does not actually implement the service, but by calling the relevant methods of the object of the delegate class. Provide specific services. According to the creation period of the agent, the agent class can be divided into two types.

6. Understanding of SpringAOP

Introduction: AOP (Aspect Orient Programming), as a supplement to object-oriented programming, is widely used to handle some system-level services with cross-cutting properties, such as transaction management, security checks, caching, and object pool management. wait. The key to AOP implementation lies in the AOP proxy automatically created by the AOP framework. AOP proxies can be divided into two categories: static proxies and dynamic proxies. Static proxies refer to compilation using the commands provided by the AOP framework, so that they can be generated during the compilation phase. The AOP proxy class is therefore also called compile-time enhancement; while the dynamic proxy uses JDK dynamic proxy, CGLIB, etc. to "temporarily" generate the AOP dynamic proxy in the memory at runtime

7 . Java's dynamic proxy class implementation log simple example

##Introduction: How is the Java dynamic proxy class Implement simple logging? ? ? Brief book address: http://www.jianshu.com/users/d38a3668be58/latest_articles

8. PHP reflection mechanism to implement dynamic proxy code

Introduction: Use the proxy class ClassOneDelegator instead of the ClassOne class to implement his methods.

9. java static proxy dynamic proxy in-depth learning

##Introduction: The proxy mode is a commonly used Java design pattern. The characteristic is that the proxy class and the delegate class have the same interface. The proxy class is mainly responsible for preprocessing messages for the delegate class, filtering messages, forwarding messages to the delegate class, and afterwards For processing messages, etc., friends who need it can refer to

10.

Button permission issues of the management system

Introduction: There is an agent-type management backend with many permission roles and many single-page operation buttons. I would like to ask a relatively mature approach, how to maintain the relationship between this kind of operation button and permissions? Different buttons are displayed for different roles. Never say to write an i in the view for each role...

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