httpClient对post内容gzip压缩和server端解压接收

来源：互联网发布：memached 端口信息编辑：程序博客网时间：2024/06/05 17:07

client端代码：

[java] view plain copy
 
public void sendHttp(String url, String message) {  
    if (StringUtils.isBlank(message)) {  
        LOGGER.info("a blank message, return.");  
        return;  
    }  
    PostMethod postMethod = new PostMethod(url);  
    postMethod.setContentChunked(true);  
    postMethod.addRequestHeader("Accept", "text/plain");  
    postMethod.setRequestHeader("Content-Encoding", "gzip");  
    postMethod.setRequestHeader("Transfer-Encoding", "chunked");  
  
    try {  
        ByteArrayOutputStream originalContent = new ByteArrayOutputStream();  
        originalContent  
                .write(message.getBytes(Charset.forName("UTF-8")));  
  
        ByteArrayOutputStream baos = new ByteArrayOutputStream();  
        GZIPOutputStream gzipOut = new GZIPOutputStream(baos);  
        originalContent.writeTo(gzipOut);  
        gzipOut.finish();  
  
        postMethod.setRequestEntity(new ByteArrayRequestEntity(baos  
                .toByteArray(), "text/plain; charset=utf-8"));  
    } catch (IOException e) {  
        LOGGER.error("write message fail.", e);  
        return;  
    }  
  
    int retry = 0;  
    do {  
        try {  
            int status = httpClient.executeMethod(postMethod);  
            if (HttpStatus.SC_OK == status) {  
                if (LOGGER.isDebugEnabled()) {  
                    LOGGER.debug("send http success, url=" + url  
                            + ", content=" + message);  
                }  
                return;  
            } else {  
                String rsp = postMethod.getResponseBodyAsString();  
                LOGGER.error("send http fail, status is: " + status  
                        + ", response is: " + rsp);  
            }  
        } catch (HttpException e) {  
            LOGGER.info("http exception when send http.", e);  
        } catch (IOException e) {  
            LOGGER.info("io exception when send http.", e);  
        } finally {  
            postMethod.releaseConnection();  
        }  
        LOGGER.info("this is "+ retry + " time, try next");  
    } while (retry++ < 3);  

server端使用servlet Filter对request请求进行处理，无论后端是哪类web框架都能适配。

[java] view plain copy
 
/** 
 *  
 */  
package filter;  
  
import java.io.IOException;  
import javax.servlet.Filter;  
import javax.servlet.FilterChain;  
import javax.servlet.FilterConfig;  
import javax.servlet.ServletException;  
import javax.servlet.ServletRequest;  
import javax.servlet.ServletResponse;  
import javax.servlet.http.HttpServletRequest;  
  
/** 
 * 如果请求消息中包含gzip压缩数据，则进行解压 
 *  
 * @author chunxi.lcx 
 *  
 */  
public class GzipFilter implements Filter {  
  
    @Override  
    public void init(FilterConfig filterConfig) throws ServletException {  
  
    }  
  
    @Override  
    public void doFilter(ServletRequest request, ServletResponse response,  
            FilterChain chain) throws IOException, ServletException {  
        chain.doFilter(new GzipRequestWrapper((HttpServletRequest) request),  
                response);  
    }  
  
    @Override  
    public void destroy() {  
  
    }  
  
}  

[java] view plain copy
 
/** 
 *  
 */  
package filter;  
  
import java.io.IOException;  
import java.util.zip.GZIPInputStream;  
  
import javax.servlet.ServletInputStream;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletRequestWrapper;  
  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
/** 
 * @author chunxi.lcx 
 *  
 */  
public class GzipRequestWrapper extends HttpServletRequestWrapper {  
    public static final Logger LOGGER = LoggerFactory  
            .getLogger(GzipRequestWrapper.class);  
    private HttpServletRequest request;  
  
    public GzipRequestWrapper(HttpServletRequest request) {  
        super(request);  
        this.request = request;  
    }  
  
    @Override  
    public ServletInputStream getInputStream() throws IOException {  
        ServletInputStream stream = request.getInputStream();  
        String contentEncoding = request.getHeader("Content-Encoding");  
        // 如果对内容进行了压缩，则解压  
        if (null != contentEncoding && contentEncoding.indexOf("gzip") != -1) {  
            try {  
                final GZIPInputStream gzipInputStream = new GZIPInputStream(  
                        stream);  
  
                ServletInputStream newStream = new ServletInputStream() {  
  
                    @Override  
                    public int read() throws IOException {  
                        return gzipInputStream.read();  
                    }  
                };  
                return newStream;  
            } catch (Exception e) {  
                LOGGER.debug("ungzip content fail.", e);  
            }  
        }  
        return stream;  
    }  
  
}  

在web.xml的合适位置配置过滤器：

[html] view plain copy
 
   <filter>  
    <filter-name>GzipFilter</filter-name>  
    <filter-class>com.taobao.xray.filter.GzipFilter</filter-class>  
</filter>  
<filter-mapping>  
    <filter-name>GzipFilter</filter-name>  
    <url-pattern>/metrics/putLines</url-pattern>  
</filter-mapping>  

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