請求網絡的方式感受平時漏掉了不少：java
/**
* Copyright (c) 2012-2013, Michael Yang 楊福海 (www.yangfuhai.com).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.tsz.afinal;node
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.zip.GZIPInputStream;ajax
import net.tsz.afinal.http.AjaxCallBack;
import net.tsz.afinal.http.AjaxParams;
import net.tsz.afinal.http.HttpHandler;
import net.tsz.afinal.http.RetryHandler;
import net.tsz.afinal.http.SyncRequestHandler;算法
import org.apache.http.Header;
import org.apache.http.HeaderElement;
import org.apache.http.HttpEntity;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.HttpVersion;
import org.apache.http.client.CookieStore;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.conn.params.ConnPerRouteBean;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.HttpEntityWrapper;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.SyncBasicHttpContext;express
public class FinalHttp {apache
private static final int DEFAULT_SOCKET_BUFFER_SIZE = 8 * 1024; //8KB
private static final String HEADER_ACCEPT_ENCODING = "Accept-Encoding";
private static final String ENCODING_GZIP = "gzip";安全
private static int maxConnections = 10; //http請求最大併發鏈接數
private static int socketTimeout = 10 * 1000; //超時時間，默認10秒
private static int maxRetries = 5;//錯誤嘗試次數，錯誤異常表請在RetryHandler添加
private static int httpThreadCount = 3;//http線程池數量服務器
private final DefaultHttpClient httpClient;
private final HttpContext httpContext;
private String charset = "utf-8";cookie
private final Map<String, String> clientHeaderMap;
//工廠模式
private static final ThreadFactory sThreadFactory = new ThreadFactory() {
//保證現場安全，至關實用synchronized在++中保證線程安全 mCount=1
private final AtomicInteger mCount = new AtomicInteger(1);
public Thread newThread(Runnable r) {
//getAndIncrement()以原子方式將當前值加 1。
Thread tread = new Thread(r, "FinalHttp #" + mCount.getAndIncrement());
//設置線程優先級比普通線程優先級低，目的還不瞭解
tread.setPriority(Thread.NORM_PRIORITY - 1);
return tread;
}
};
//線程池放三條線程
private static final Executor executor =Executors.newFixedThreadPool(httpThreadCount, sThreadFactory);網絡
public FinalHttp() {
//這個類表明HTTP協議參數的集合。協議參數可能鏈接在一塊兒造成一個層次結構。若是一個特定的參數值沒有明肯定義在集合自己,它的價值未來自父母的參數集合。
BasicHttpParams httpParams = new BasicHttpParams();
// ConnManagerParams這個類表明HTTP協議的集合參數適用於客戶端鏈接管理器。
//•'http.socket.timeout'：定義了套接字的毫秒級超時時間（SO_TIMEOUT），這就是等待數據，換句話說，在兩個連續的數據包之間最大的閒置時間。若是超時時間是0就解釋爲是一個無限大的超時時間。這個參數指望獲得一個java.lang.Integer類型的值。若是這個參數沒有被設置，那麼讀取操做就不會超時（無限大的超時時間）。
// 這定義了從ConnectionManager管理的鏈接池中取出鏈接的超時時間
ConnManagerParams.setTimeout(httpParams, socketTimeout);
//每一個路由接口容許最大鏈接數。
ConnManagerParams.setMaxConnectionsPerRoute(httpParams, new ConnPerRouteBean(maxConnections));
// 設置容許的最大鏈接數。
ConnManagerParams.setMaxTotalConnections(httpParams, 10);
// 這定義了Socket讀數據的超時時間，即從服務器獲取響應數據須要等待的時間
HttpConnectionParams.setSoTimeout(httpParams, socketTimeout);
// 這定義了經過網絡與服務器創建鏈接的超時時間。Httpclient包中經過一個異步線程去建立與服務器的socket鏈接，這就是該socket鏈接的超時時間
HttpConnectionParams.setConnectionTimeout(httpParams, socketTimeout);
// •'http.tcp.nodelay'：決定了是否使用Nagle算法。Nagle算法視圖經過最小化發送的分組數量來節省帶寬。當應用程序但願下降網絡延遲並提升性能時，它們能夠關閉Nagle算法（也就是開啓TCP_NODELAY）。數據將會更早發送，增長了帶寬消耗的成文。這個參數指望獲得一個java.lang.Boolean類型的值。若是這個參數沒有被設置，那麼TCP_NODELAY就會開啓（無延遲）。
HttpConnectionParams.setTcpNoDelay(httpParams, true);
HttpConnectionParams.setSocketBufferSize(httpParams, DEFAULT_SOCKET_BUFFER_SIZE);
HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1);
/* 設置咱們的HttpClient支持HTTP和HTTPS兩種模式 */
//Scheme類表明了一個協議模式，好比「http」或「https」同時包含一些協議屬性，好比默認端口，用來爲給定協議建立java.net.Socket實例的套接字工廠。SchemeRegistry類用來維持一組Scheme，當去經過請求URI創建鏈接時，HttpClient能夠從中選擇：
SchemeRegistry schemeRegistry = new SchemeRegistry();
// PlainSocketFactory是建立和初始化普通的（不加密的）套接字的默認工廠。
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
//HttpClient使用SSLSocketFactory來建立SSL鏈接。SSLSocketFactory容許高度定製
schemeRegistry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
//implements ClientConnectionManager 建立一個新的線程安全的鏈接管理器。
ThreadSafeClientConnManager cm = new ThreadSafeClientConnManager(httpParams, schemeRegistry);
httpContext = new SyncBasicHttpContext(new BasicHttpContext());
httpClient = new DefaultHttpClient(cm, httpParams);
httpClient.addRequestInterceptor(new HttpRequestInterceptor() {
public void process(HttpRequest request, HttpContext context) {
if (!request.containsHeader(HEADER_ACCEPT_ENCODING)) {
request.addHeader(HEADER_ACCEPT_ENCODING, ENCODING_GZIP);
}
for (String header : clientHeaderMap.keySet()) {
request.addHeader(header, clientHeaderMap.get(header));
}
}
});
httpClient.addResponseInterceptor(new HttpResponseInterceptor() {
public void process(HttpResponse response, HttpContext context) {
final HttpEntity entity = response.getEntity();
if (entity == null) {
return;
}
final Header encoding = entity.getContentEncoding();
if (encoding != null) {
for (HeaderElement element : encoding.getElements()) {
if (element.getName().equalsIgnoreCase(ENCODING_GZIP)) {
response.setEntity(new InflatingEntity(response.getEntity()));
break;
}
}
}
}
});
//重試
httpClient.setHttpRequestRetryHandler(new RetryHandler(maxRetries));
clientHeaderMap = new HashMap<String, String>();
}
public HttpClient getHttpClient() {
return this.httpClient;
}
public HttpContext getHttpContext() {
return this.httpContext;
}
public void configCharset(String charSet){
if(charSet!=null && charSet.trim().length()!=0)
this.charset = charSet;
}
public void configCookieStore(CookieStore cookieStore) {
httpContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
}
public void configUserAgent(String userAgent) {
HttpProtocolParams.setUserAgent(this.httpClient.getParams(), userAgent);
}
/**
* 設置網絡鏈接超時時間，默認爲10秒鐘
* @param timeout
*/
public void configTimeout(int timeout){
final HttpParams httpParams = this.httpClient.getParams();
ConnManagerParams.setTimeout(httpParams, timeout);
HttpConnectionParams.setSoTimeout(httpParams, timeout);
HttpConnectionParams.setConnectionTimeout(httpParams, timeout);
}
/**
* 設置https請求時 的 SSLSocketFactory
* @param sslSocketFactory
*/
public void configSSLSocketFactory(SSLSocketFactory sslSocketFactory) {
Scheme scheme = new Scheme("https", sslSocketFactory, 443);
this.httpClient.getConnectionManager().getSchemeRegistry().register(scheme);
}
/**
* 配置錯誤重試次數
* @param retry
*/
public void configRequestExecutionRetryCount(int count){
this.httpClient.setHttpRequestRetryHandler(new RetryHandler(count));
}
/**
* 添加http請求頭
* @param header
* @param value
*/
public void addHeader(String header, String value) {
clientHeaderMap.put(header, value);
}
//------------------get 請求-----------------------
public void get( String url, AjaxCallBack<? extends Object> callBack) {
get( url, null, callBack);
}
public void get( String url, AjaxParams params, AjaxCallBack<? extends Object> callBack) {
sendRequest(httpClient, httpContext, new HttpGet(getUrlWithQueryString(url, params)), null, callBack);
}
public void get( String url, Header[] headers, AjaxParams params, AjaxCallBack<? extends Object> callBack) {
HttpUriRequest request = new HttpGet(getUrlWithQueryString(url, params));
if(headers != null) request.setHeaders(headers);
sendRequest(httpClient, httpContext, request, null, callBack);
}
public Object getSync( String url) {
return getSync( url, null);
}
public Object getSync( String url, AjaxParams params) {
HttpUriRequest request = new HttpGet(getUrlWithQueryString(url, params));
return sendSyncRequest(httpClient, httpContext, request, null);
}
public Object getSync( String url, Header[] headers, AjaxParams params) {
HttpUriRequest request = new HttpGet(getUrlWithQueryString(url, params));
if(headers != null) request.setHeaders(headers);
return sendSyncRequest(httpClient, httpContext, request, null);
}
//------------------post 請求-----------------------
public void post(String url, AjaxCallBack<? extends Object> callBack) {
post(url, null, callBack);
}
public void post(String url, AjaxParams params, AjaxCallBack<? extends Object> callBack) {
post(url, paramsToEntity(params), null, callBack);
}
public void post( String url, HttpEntity entity, String contentType, AjaxCallBack<? extends Object> callBack) {
sendRequest(httpClient, httpContext, addEntityToRequestBase(new HttpPost(url), entity), contentType, callBack);
}
public <T> void post( String url, Header[] headers, AjaxParams params, String contentType,AjaxCallBack<T> callBack) {
HttpEntityEnclosingRequestBase request = new HttpPost(url);
if(params != null) request.setEntity(paramsToEntity(params));
if(headers != null) request.setHeaders(headers);
sendRequest(httpClient, httpContext, request, contentType, callBack);
}
public void post( String url, Header[] headers, HttpEntity entity, String contentType,AjaxCallBack<? extends Object> callBack) {
HttpEntityEnclosingRequestBase request = addEntityToRequestBase(new HttpPost(url), entity);
if(headers != null) request.setHeaders(headers);
sendRequest(httpClient, httpContext, request, contentType, callBack);
}
public Object postSync(String url) {
return postSync(url, null);
}
public Object postSync(String url, AjaxParams params) {
return postSync(url, paramsToEntity(params), null);
}
public Object postSync( String url, HttpEntity entity, String contentType) {
return sendSyncRequest(httpClient, httpContext, addEntityToRequestBase(new HttpPost(url), entity), contentType);
}
public Object postSync( String url, Header[] headers, AjaxParams params, String contentType) {
HttpEntityEnclosingRequestBase request = new HttpPost(url);
if(params != null) request.setEntity(paramsToEntity(params));
if(headers != null) request.setHeaders(headers);
return sendSyncRequest(httpClient, httpContext, request, contentType);
}
public Object postSync( String url, Header[] headers, HttpEntity entity, String contentType) {
HttpEntityEnclosingRequestBase request = addEntityToRequestBase(new HttpPost(url), entity);
if(headers != null) request.setHeaders(headers);
return sendSyncRequest(httpClient, httpContext, request, contentType);
}
//------------------put 請求-----------------------
public void put(String url, AjaxCallBack<? extends Object> callBack) {
put(url, null, callBack);
}
public void put( String url, AjaxParams params, AjaxCallBack<? extends Object> callBack) {
put(url, paramsToEntity(params), null, callBack);
}
public void put( String url, HttpEntity entity, String contentType, AjaxCallBack<? extends Object> callBack) {
sendRequest(httpClient, httpContext, addEntityToRequestBase(new HttpPut(url), entity), contentType, callBack);
}
public void put(String url,Header[] headers, HttpEntity entity, String contentType, AjaxCallBack<? extends Object> callBack) {
HttpEntityEnclosingRequestBase request = addEntityToRequestBase(new HttpPut(url), entity);
if(headers != null) request.setHeaders(headers);
sendRequest(httpClient, httpContext, request, contentType, callBack);
}
public Object putSync(String url) {
return putSync(url, null);
}
public Object putSync( String url, AjaxParams params) {
return putSync(url, paramsToEntity(params),null);
}
public Object putSync(String url, HttpEntity entity, String contentType) {
return putSync(url,null, entity, contentType);
}
public Object putSync(String url,Header[] headers, HttpEntity entity, String contentType) {
HttpEntityEnclosingRequestBase request = addEntityToRequestBase(new HttpPut(url), entity);
if(headers != null) request.setHeaders(headers);
return sendSyncRequest(httpClient, httpContext, request, contentType);
}
//------------------delete 請求-----------------------
public void delete( String url, AjaxCallBack<? extends Object> callBack) {
final HttpDelete delete = new HttpDelete(url);
sendRequest(httpClient, httpContext, delete, null, callBack);
}
public void delete( String url, Header[] headers, AjaxCallBack<? extends Object> callBack) {
final HttpDelete delete = new HttpDelete(url);
if(headers != null) delete.setHeaders(headers);
sendRequest(httpClient, httpContext, delete, null, callBack);
}
public Object deleteSync(String url) {
return deleteSync(url,null);
}
public Object deleteSync( String url, Header[] headers) {
final HttpDelete delete = new HttpDelete(url);
if(headers != null) delete.setHeaders(headers);
return sendSyncRequest(httpClient, httpContext, delete, null);
}
//---------------------下載---------------------------------------
public HttpHandler<File> download(String url,String target,AjaxCallBack<File> callback){
return download(url, null, target, false, callback);
}
public HttpHandler<File> download(String url,String target,boolean isResume,AjaxCallBack<File> callback){
return download(url, null, target, isResume, callback);
}
public HttpHandler<File> download( String url,AjaxParams params, String target, AjaxCallBack<File> callback) {
return download(url, params, target, false, callback);
}
public HttpHandler<File> download( String url,AjaxParams params, String target,boolean isResume, AjaxCallBack<File> callback) {
final HttpGet get = new HttpGet(getUrlWithQueryString(url, params));
HttpHandler<File> handler = new HttpHandler<File>(httpClient, httpContext, callback,charset);
handler.executeOnExecutor(executor,get,target,isResume);
return handler;
}
protected <T> void sendRequest(DefaultHttpClient client, HttpContext httpContext, HttpUriRequest uriRequest, String contentType, AjaxCallBack<T> ajaxCallBack) {
if(contentType != null) {
uriRequest.addHeader("Content-Type", contentType);
}
new HttpHandler<T>(client, httpContext, ajaxCallBack,charset)
.executeOnExecutor(executor, uriRequest);
}
protected Object sendSyncRequest(DefaultHttpClient client, HttpContext httpContext, HttpUriRequest uriRequest, String contentType) {
if(contentType != null) {
uriRequest.addHeader("Content-Type", contentType);
}
return new SyncRequestHandler(client, httpContext,charset).sendRequest(uriRequest);
}
public static String getUrlWithQueryString(String url, AjaxParams params) {
if(params != null) {
String paramString = params.getParamString();
url += "?" + paramString;
}
return url;
}
private HttpEntity paramsToEntity(AjaxParams params) {
HttpEntity entity = null;
if(params != null) {
entity = params.getEntity();
}
return entity;
}
private HttpEntityEnclosingRequestBase addEntityToRequestBase(HttpEntityEnclosingRequestBase requestBase, HttpEntity entity) {
if(entity != null){
requestBase.setEntity(entity);
}
return requestBase;
}
private static class InflatingEntity extends HttpEntityWrapper {
public InflatingEntity(HttpEntity wrapped) {
super(wrapped);
}
@Override
public InputStream getContent() throws IOException {
return new GZIPInputStream(wrappedEntity.getContent());
}
@Override
public long getContentLength() {
return -1;
}
}
}