基于httpcorehttpclient component搭建轻量级http服务器.docx
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基于httpcorehttpclientcomponent搭建轻量级http服务器
基于httpcore（httpclientcomponent）搭建轻量级http服务器
基于httpcore（httpclientcomponent）搭建轻量级http服务器
下面是apache官网例子
服务器端接受请求，实现接收文件请求处理器
importjava.io.File;
importjava.io.IOException;
importjava.io.InterruptedIOException;
import.ServerSocket;
import.Socket;
import.URL;
import.URLDecoder;
importjava.nio.charset.Charset;
importjava.security.KeyStore;
importjava.util.Locale;
importorg.apache.http.ConnectionClosedException;
importorg.apache.http.HttpConnectionFactory;
importorg.apache.http.HttpEntity;
importorg.apache.http.HttpEntityEnclosingRequest;
importorg.apache.http.HttpException;
importorg.apache.http.HttpRequest;
importorg.apache.http.HttpResponse;
importorg.apache.http.HttpServerConnection;
importorg.apache.http.HttpStatus;
importorg.apache.http.MethodNotSupportedException;
importorg.apache.http.entity.ContentType;
importorg.apache.http.entity.FileEntity;
importorg.apache.http.entity.StringEntity;
importorg.apache.http.impl.DefaultBHttpServerConnection;
importorg.apache.http.impl.DefaultBHttpServerConnectionFactory;
importorg.apache.http.protocol.BasicHttpContext;
importorg.apache.http.protocol.HttpContext;
importorg.apache.http.protocol.HttpProcessor;
importorg.apache.http.protocol.HttpProcessorBuilder;
importorg.apache.http.protocol.HttpRequestHandler;
importorg.apache.http.protocol.HttpService;
importorg.apache.http.protocol.ResponseConnControl;
importorg.apache.http.protocol.ResponseContent;
importorg.apache.http.protocol.ResponseDate;
importorg.apache.http.protocol.ResponseServer;
importorg.apache.http.protocol.UriHttpRequestHandlerMapper;
importorg.apache.http.util.EntityUtils;
import.ssl.KeyManager;
import.ssl.KeyManagerFactory;
import.ssl.SSLContext;
import.ssl.SSLServerSocketFactory;
/**
*Basic,yetfullyfunctionalandspeccompliant,HTTP/1.1fileserver.
*/
publicclassElementalHttpServer{
publicstaticvoidmain（String[]args）throwsException{
if（args.length<1）{
System.err.println（"Pleasespecifydocumentrootdirectory"）;
System.exit
（1）;
}
//Documentrootdirectory
StringdocRoot=args[0];
intport=8080;
if（args.length>=2）{
port=Integer.parseInt（args[1]）;
}
//SetuptheHTTPprotocolprocessor
HttpProcessorhttpproc=HttpProcessorBuilder.create（）
.add（newResponseDate（））
.add（newResponseServer（"Test/1.1"））
.add（newResponseContent（））
.add（newResponseConnControl（））.build（）;
//Setuprequesthandlers
UriHttpRequestHandlerMapperreqistry=newUriHttpRequestHandlerMapper（）;
reqistry.register（"*",newHttpFileHandler（docRoot））;
//SetuptheHTTPservice
HttpServicehttpService=newHttpService（httpproc,reqistry）;
SSLServerSocketFactorysf=null;
if（port==8443）{
//InitializeSSLcontext
ClassLoadercl=ElementalHttpServer.class.getClassLoader（）;
URLurl=cl.getResource（"my.keystore"）;
if（url==null）{
System.out.println（"Keystorenotfound"）;
System.exit
（1）;
}
KeyStorekeystore=KeyStore.getInstance（"jks"）;
keystore.load（url.openStream（）,"secret".toCharArray（））;
KeyManagerFactorykmfactory=KeyManagerFactory.getInstance（
KeyManagerFactory.getDefaultAlgorithm（））;
kmfactory.init（keystore,"secret".toCharArray（））;
KeyManager[]keymanagers=kmfactory.getKeyManagers（）;
SSLContextsslcontext=SSLContext.getInstance（"TLS"）;
sslcontext.init（keymanagers,null,null）;
sf=sslcontext.getServerSocketFactory（）;
}
Threadt=newRequestListenerThread（port,httpService,sf）;
t.setDaemon（false）;
t.start（）;
}
staticclassHttpFileHandlerimplementsHttpRequestHandler{
privatefinalStringdocRoot;
publicHttpFileHandler（finalStringdocRoot）{
super（）;
this.docRoot=docRoot;
}
publicvoidhandle（
finalHttpRequestrequest,
finalHttpResponseresponse,
finalHttpContextcontext）throwsHttpException,IOException{
Stringmethod=request.getRequestLine（）.getMethod（）.toUpperCase（Locale.ENGLISH）;
if（!
method.equals（"GET"）&&!
method.equals（"HEAD"）&&!
method.equals（"POST"））{
thrownewMethodNotSupportedException（method+"methodnotsupported"）;
}
Stringtarget=request.getRequestLine（）.getUri（）;
if（requestinstanceofHttpEntityEnclosingRequest）{
HttpEntityentity=（（HttpEntityEnclosingRequest）request）.getEntity（）;
byte[]entityContent=EntityUtils.toByteArray（entity）;
System.out.println（"Incomingentitycontent（bytes）:
"+entityContent.length）;
}
finalFilefile=newFile（this.docRoot,URLDecoder.decode（target,"UTF-8"））;
if（!
file.exists（））{
response.setStatusCode（HttpStatus.SC_NOT_FOUND）;
StringEntityentity=newStringEntity（
"
File"+file.getPath（）+
"notfound",
ContentType.create（"text/html","UTF-8"））;
response.setEntity（entity）;
System.out.println（"File"+file.getPath（）+"notfound"）;
}elseif（!
file.canRead（）||file.isDirectory（））{
response.setStatusCode（HttpStatus.SC_FORBIDDEN）;
StringEntityentity=newStringEntity（
"
Accessdenied
",
ContentType.create（"text/html","UTF-8"））;
response.setEntity（entity）;
System.out.println（"Cannotreadfile"+file.getPath（））;
}else{
response.setStatusCode（HttpStatus.SC_OK）;
FileEntitybody=newFileEntity（file,ContentType.create（"text/html",（Charset）null））;
response.setEntity（body）;
System.out.println（"Servingfile"+file.getPath（））;
}
}
}
staticclassRequestListenerThreadextendsThread{
privatefinalHttpConnectionFactoryconnFactory;
privatefinalServerSocketserversocket;
privatefinalHttpServicehttpService;
publicRequestListenerThread（
finalintport,
finalHttpServicehttpService,
finalSSLServerSocketFactorysf）throwsIOException{
this.connFactory=DefaultBHttpServerConnectionFactory.INSTANCE;
this.serversocket=sf!
=null?
sf.createServerSocket（port）:
newServerSocket（port）;
this.httpService=httpService;
}
@Override
publicvoidrun（）{
System.out.println（"Listeningonport"+this.serversocket.getLocalPort（））;
while（!
Thread.interrupted（））{
try{
//SetupHTTPconnection
Socketsocket=this.serversocket.accept（）;
System.out.println（"Incomingconnectionfrom"+socket.getInetAddress（））;
HttpServerConnectionconn=this.connFactory.createConnection（socket）;
//Startworkerthread
Threadt=newWorkerThread（this.httpService,conn）;
t.setDaemon（true）;
t.start（）;
}catch（InterruptedIOExceptionex）{
break;
}catch（IOExceptione）{
System.err.println（"I/Oerrorinitialisingconnectionthread:
"
+e.getMessage（））;
break;
}
}
}
}
staticclassWorkerThreadextendsThread{
privatefinalHttpServicehttpservice;
privatefinalHttpServerConnectionconn;
publicWorkerThread（
finalHttpServicehttpservice,
finalHttpServerConnectionconn）{
super（）;
this.httpservice=httpservice;
this.conn=conn;
}
@Override
publicvoidrun（）{
System.out.println（"Newconnectionthread"）;
HttpContextcontext=newBasicHttpContext（null）;
try{
while（!
Thread.interrupted（）&&this.conn.isOpen（））{
this.httpservice.handleRequest（this.conn,context）;
}
}catch（ConnectionClosedExceptionex）{
System.err.println（"Clientclosedconnection"）;
}catch（IOExceptionex）{
System.err.println（"I/Oerror:
"+ex.getMessage（））;
}catch（HttpExceptionex）{
System.err.println（"UnrecoverableHTTPprotocolviolation:
"+ex.getMessage（））;
}finally{
try{
this.conn.shutdown（）;
}catch（IOExceptionignore）{}
}
}
}
}
客户端get请求实现类
import.Socket;
importorg.apache.http.ConnectionReuseStrategy;
importorg.apache.http.HttpHost;
importorg.apache.http.HttpResponse;
importorg.apache.http.impl.DefaultBHttpClientConnection;
importorg.apache.http.impl.DefaultConnectionReuseStrategy;
importorg.apache.http.message.BasicHttpRequest;
importorg.apache.http.protocol.HttpCoreContext;
importorg.apache.http.protocol.HttpProcessor;
importorg.apache.http.protocol.HttpProcessorBuilder;
importorg.apache.http.protocol.HttpRequestExecutor;
importorg.apache.http.protocol.RequestConnControl;
importorg.apache.http.protocol.RequestContent;
importorg.apache.http.protocol.RequestExpectContinue;
importorg.apache.http.protocol.RequestTargetHost;
importorg.apache.http.protocol.RequestUserAgent;
importorg.apache.http.util.EntityUtils;
/**
*ElementalexampleforexecutingmultipleGETrequestssequentially.
*/
publicclassElementalHttpGet{
publicstaticvoidmain（String[]args）throwsException{
HttpProcessorhttpproc=HttpProcessorBuilder.create（）
.add（newRequestContent（））
.add（newRequestTargetHost（））
.add（newRequestConnControl（））
.add（newRequestUserAgent（"Test/1.1"））
.add（newRequestExpectContinue（true））.build（）;
System.out.println（"Connectionkeptalive..."）;
}
}
}finally{
conn.close（）;
}
}
}
客户端post请求实现类
importjava.io.ByteArrayInputStream;
import.Socket;
importorg.apache.http.ConnectionReuseStrategy;
importorg.apache.http.Consts;
importorg.apache.http.HttpEntity;
importorg.apache.http.HttpHost;
importorg.apache.http.HttpResponse;
importorg.apache.http.entity.ByteArrayEntity;
importorg.apache.http.entity.ContentType;
importorg.apache.http.entity.InputStreamEntity;
importorg.apache.http.entity.StringEntity;
importorg.apache.http.impl.DefaultBHttpClientConnection;
importorg.apache.http.impl.DefaultConnectionReuseStrategy;
importorg.apache.http.message.BasicHttpEntityEnclosingRequest;
importorg.apache.http.protocol.HttpCoreContext;
importorg.apache.http.protocol.HttpProcessor;
importorg.apache.http.protocol.HttpProcessorBuilder;
importorg.apache.http.protocol.HttpRequestExecutor;
importorg.apache.http.p
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