top.jfunc.common.http.base.AbstractNativeHttpTemplate Maven / Gradle / Ivy
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http客户端请求工具类，有多种实现：OkHttp3、ApacheHttpClient、HttpURLConnection、Jodd-Http，可以随意切换http实现
package top.jfunc.common.http.base;
import top.jfunc.common.http.HttpConstants;
import top.jfunc.common.http.HttpStatus;
import top.jfunc.common.http.Method;
import top.jfunc.common.http.base.ssl.DefaultTrustManager;
import top.jfunc.common.http.base.ssl.SSLSocketFactoryBuilder;
import top.jfunc.common.http.base.ssl.TrustAnyHostnameVerifier;
import top.jfunc.common.utils.ArrayListMultimap;
import top.jfunc.common.utils.IoUtil;
import javax.net.ssl.*;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.ProtocolException;
import java.util.HashMap;
import java.util.Set;
/**
* 使用URLConnection实现的Http公共父类
* @author 熊诗言2018/6/6
*/
public abstract class AbstractNativeHttpTemplate extends AbstractConfigurableHttp implements HttpTemplate {
@Override
public R template(String url, Method method, String contentType, ContentCallback contentCallback, ArrayListMultimap headers, Integer connectTimeout, Integer readTimeout, String resultCharset , boolean includeHeaders , ResultCallback resultCallback) throws IOException {
//默认的https校验
// 后面会处理的，这里就不需要了 initDefaultSSL(sslVer);
HttpURLConnection connect = null;
InputStream inputStream = null;
try {
//1.获取连接
String completedUrl = addBaseUrlIfNecessary(url);
connect = (HttpURLConnection)new java.net.URL(completedUrl).openConnection();
//2.处理header
setConnectProperty(connect, method, contentType,
mergeDefaultHeaders(headers),
getConnectionTimeoutWithDefault(connectTimeout),
getReadTimeoutWithDefault(readTimeout));
////////////////////////////////////ssl处理///////////////////////////////////
if(connect instanceof HttpsURLConnection){
//默认设置这些
HttpsURLConnection con = (HttpsURLConnection)connect;
initSSL(con , getHostnameVerifier() , getSSLSocketFactory());
}
////////////////////////////////////ssl处理///////////////////////////////////
//3.留给子类复写的机会:给connection设置更多参数
doWithConnection(connect);
//5.写入内容，只对post有效
if(contentCallback != null && method.hasContent()){
contentCallback.doWriteWith(connect);
}
//4.连接
connect.connect();
//6.获取返回值
int statusCode = connect.getResponseCode();
///保留起非200抛异常的方式
// if( HttpStatus.HTTP_OK == statusCode){
// //6.1获取body
// /*InputStream is = connect.getInputStream();
// byte[] result = IoUtil.stream2Bytes(is);
// is.close();
//
// String s = new String(result, resultCharset);*/
//
// //6.2获取header
//
// inputStream = connect.getInputStream();
//
// return resultCallback.convert(inputStream, resultCharset, includeHeaders ? connect.getHeaderFields() : new HashMap<>(0));
//
// } else{
// String err = errMessage(connect);
// throw new HttpException(statusCode,err,connect.getHeaderFields());
// }
inputStream = getStreamFrom(connect , statusCode , false);
return resultCallback.convert(statusCode , inputStream, getResultCharsetWithDefault(resultCharset), includeHeaders ? connect.getHeaderFields() : new HashMap<>(0));
} catch (IOException e) {
throw e;
} catch (Exception e){
throw new RuntimeException(e);
} finally {
//关闭顺序不能改变，否则服务端可能出现这个异常 严重: java.io.IOException: 远程主机强迫关闭了一个现有的连接
//1 . 关闭连接
disconnectQuietly(connect);
//2 . 关闭流
IoUtil.close(inputStream);
}
}
protected InputStream getStreamFrom(HttpURLConnection connect , int statusCode , boolean ignoreResponseBody) throws IOException{
//忽略返回body的情况下，直接返回空的
if(ignoreResponseBody){
return top.jfunc.common.http.IoUtil.emptyInputStream();
}
InputStream inputStream;
if(HttpStatus.HTTP_OK == statusCode){
inputStream = connect.getInputStream();
}else {
inputStream = connect.getErrorStream();
}
if(null == inputStream){
inputStream = top.jfunc.common.http.IoUtil.emptyInputStream();
}
return inputStream;
}
/**子类复写需要首先调用此方法，保证http的功能*/
protected void doWithConnection(HttpURLConnection connect) throws IOException{
//default do nothing, give children a chance to do more config
}
/**
* @see SSLSocketFactoryBuilder#build()
* @see SSLSocketFactoryBuilder#build(String, String)
*/
protected void initSSL(HttpsURLConnection con , HostnameVerifier hostnameVerifier , SSLSocketFactory sslSocketFactory) {
// 验证域
if(null != hostnameVerifier){
con.setHostnameVerifier(hostnameVerifier);
}
if(null != sslSocketFactory){
con.setSSLSocketFactory(sslSocketFactory);
}
}
protected void setConnectProperty(HttpURLConnection connect, Method method, String contentType, ArrayListMultimap headers, int connectTimeout, int readTimeout) throws ProtocolException {
connect.setRequestMethod(method.name());
connect.setDoOutput(true);
connect.setUseCaches(false);
setRequestHeaders(connect , contentType , headers);
connect.setConnectTimeout(connectTimeout);
connect.setReadTimeout(readTimeout);
}
protected void setRequestHeaders(HttpURLConnection connection, String contentType, ArrayListMultimap headers) {
if(null != headers) {
Set keySet = headers.keySet();
keySet.forEach((k)->headers.get(k).forEach((v)->connection.addRequestProperty(k,v)));
}
if(null != contentType){
connection.setRequestProperty(top.jfunc.common.http.Header.CONTENT_TYPE.toString(), contentType);
}
}
protected void writeContent(HttpURLConnection connect, String data, String bodyCharset) throws IOException {
if (null == data || null == bodyCharset) {
return;
}
OutputStream outputStream = connect.getOutputStream();
outputStream.write(data.getBytes(bodyCharset));
outputStream.close();
/* PrintWriter out = new PrintWriter(connect.getOutputStream());
if (null != data) {
out.print(data);
out.flush();
}
out.close();*/
}
/**
* 获取输出流中的错误信息，针对HttpURLConnection
* @param connect HttpURLConnection
* @return 错误信息
* @see HttpURLConnection
* @throws IOException IO异常
*/
protected String errMessage(HttpURLConnection connect) throws IOException {
//如果服务器返回的HTTP状态不是HTTP_OK，则表示发生了错误，此时可以通过如下方法了解错误原因。
// 通过getErrorStream了解错误的详情
InputStream is = connect.getErrorStream();
if(null==is){return "";}
InputStreamReader isr = new InputStreamReader(is, HttpConstants.DEFAULT_CHARSET);
BufferedReader in = new BufferedReader(isr);
String inputLine;
StringWriter bw = new StringWriter();
while ((inputLine = in.readLine()) != null)
{
bw.write(inputLine);
bw.write("\n");
}
bw.close();
in.close();
//disconnectQuietly(connect);
return bw.getBuffer().toString();
}
public static void disconnectQuietly(HttpURLConnection connect) {
if(null != connect){
try {
connect.disconnect();
} catch (Exception e) {}
}
}
protected void initDefaultSSL(String sslVer) {
try {
TrustManager[] tmCerts = new TrustManager[1];
tmCerts[0] = new DefaultTrustManager();
SSLContext sslContext = SSLContext.getInstance(sslVer);
sslContext.init(null, tmCerts, null);
HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
HostnameVerifier hostnameVerifier = new TrustAnyHostnameVerifier();
HttpsURLConnection.setDefaultHostnameVerifier(hostnameVerifier);
} catch (Exception e) {
}
}
}
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