Java reflection and dynamic proxy, java reflection dynamic proxy
The two things that have been unclear are recorded today, java reflection and dynamic proxy
Java reflection: 1. The ability to analyze classes at runtime
2. view the object during running
3. array operation code
4. Use the Method object
In java. lang. the reflect package contains three classes: Fiel
1.Concept of forward proxy
Forward proxyIsOrigin server)To get content from the original server, the client sends a request to the proxy and specifies the target (original server ), then the proxy transfers the request to the original server and returns the obtained content to the client. The client must make some special settings to use the forward
1.1.view various information about the dynamic proxy classthrough the reflection mechanism can obtain Proxy creates a variety of information about the dynamic proxy class, including implemented interfaces, constructors, methods, and so on. Once you see this information, you can better understand why dynamic proxies are used. /*** @Title: proxytest.java* @Package
In the previous article, I wrote how to enable scrapy to Support HTTP proxy.
But scrapy does not support socks proxy by default. Sometimes the pure HTTP proxy is easily intercepted by g f w, and proxy is required to collect websites blocked from abroad. Okay, capability is forced by demand.
The following describes a s
provide the API to get the target object.Java code
Import Java.lang.reflect.Field;
Import Org.springframework.aop.framework.AdvisedSupport;
Import Org.springframework.aop.framework.AopProxy;
Import Org.springframework.aop.support.AopUtils;
Public class Aoptargetutils {
/**
* Get target object
* @param proxy Object
* @return
* @throws Exception
*/
public Static Object Gettarget (object
Last night a buddy needs to get the target object of the proxy object, find the document found no corresponding tool class, so I wrote a share to everyone. Can obtain the target object of the JDK dynamic Agent/cglib proxy object agent.Problem Description::I now have a tricky problem, to save the object through the spring managed service class, which is obtained through reflection, and it is experimentally d
Design Mode-proxy, design mode proxy
The proxy mode provides a proxy for other objects to control access to this object. In some cases, a customer does not want to directly reference another object, and the proxy object can play a mediation role between the client and the ta
Ubuntu installs squid as the Proxy of the intranet. I have a machine named UbuntuLinux, which has a wireless network card and can be used on the Internet. I want to set it as a proxy server so that other machines in the intranet can use it as a proxy for Internet access. 1. install squid in Ubuntu as the Proxy of the i
Work, we will inevitably need to send a message through the TCP/IP protocol to directly request Web content (such as crawler tools), a classmate asked how to request the Web page through HTTP proxy, in fact, we just need to change the message slightly, sent to the proxy server can be achieved.Foundation of the friend can search under: HTTP message, HTTP proxy pri
Mac converts socks5 proxy to http/https Proxy
GFW is lucky, pip is not busy, and it only supports http proxy.
The ss proxy is socks and listens to port 1080. So I used the privoxy tool to convert socks to http.
Download: http://download.csdn.net/detail/u010211892/8413677
After installation
/Usr/local/etc/privoxy/config
The details are as follows:
Proxy ErrorThe proxy server has ed an invalid response from an upstream server.The proxy server cocould not handle the request get /.
Reason: DNS lookup failure for: localhost
Solutions provided by Google:
With the following 'murxaround 'it's working now:-Added 'keeplive off' in httpd. conf-> no effect-Set keep-alive timeout to 1 day i
Proxy (agent mode) and facade (appearance) design modeThey all provide abstractions for more complex functions, but these two processes are very different in their abstraction.Proxy case, all methods and member variables are from the target object, and if necessary, the agent can modify or check the data it passesMagic Method makes the implementation of the proxy simple, a class of
For the dynamic agent of the JDK, Konghao says the way to learn is to write it down.First, write a topic interface class that represents a topic to complete. Package Com.liwei.dynaproxy; /** @author*/Publicinterface Subject { publicvoid miai ();}Write an implementation class that implements this interface. Of course, this implementation class is the object we want to proxy.In order to distinguish between objects of different classes, we have added a name attribute to the person class, and
1, Agent Server squid IntroductionSquid cache (squid) is a popular free software (GNU General Public License) proxy server and Web cache server. Squid has a wide range of uses, from caching related requests as Web server cache servers to increasing the speed of Web servers, to sharing network resources for a group of people and caching the World Wide Web, domain name systems and other network searches, to help network security by filtering traffic, to
Agent refers to the role of a character acting on behalf of another, like in life, a wine manufacturer, is not directly to the red wine retail customers, are through the agency to complete his sales business. And customers, also do not have to drink red wine and everywhere looking for factories, he just find manufacturers in the local agent on the line, the specific wine factory there, customers do not care, agents will help him deal with.
The proxy
Apache forward proxy and reverse proxy configuration Sample forward proxy configuration:
Proxyrequests on
Proxyvia on
Order deny, allow
Deny from all
Allow from 192.168.0
Cacheenable Disk/
Cacheroot "/var/Cache/mod_proxy"
Example of reverse proxy configuration:
Tip: The following are purely personal points of view, if any, please indicate and understandImport Java.lang.reflect.Proxy;Proxies can dynamically proxy an objectWrite a proxy factory class Proxyfactory: PackageCom.zhangpn.serviceImpl;ImportJava.lang.reflect.InvocationHandler;ImportJava.lang.reflect.Method;ImportJava.lang.reflect.Proxy; Public classProxyfactoryImplementsInvocationhandler {PrivateObject Tar
(a) What is it? What?①: Definition:②: Features: 1.0 proxy class (intermediate suitor), with the same interface as the delegate class (suitor);2.0 proxy class ---> is mainly responsible for preprocessing messages for the delegate class , filtering the message, passing the message to the delegate class, processing the message afterwards, and so on. "Similar: Help others chase a girlfriend, inquire the news".3
First, Nginx forward and reverse proxy
1, Nginx of the forward agent
The forward proxy is a server located between the client and the original server (Origin server), in order to obtain content from the original server, the client sends a request to the agent and specifies the target (the original server), and the agent then forwards the request to the original server and returns the obtained content to t
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