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HTTP请求分片传输

2020年07月17日 | 移动技术网IT编程 | 我要评论

一.背景

有个项目，客户的宽带只有上下行速度大概256KB/每秒，在模板过大的情况一直被网络重置，采用分片传输，降低传输容量

二.nginx代理配置限速

stream {
    upstream backend {
        server 61.145.229.28:7241
    }
    server {
        listen 7241;
        proxy_connect_timeout 10s;
        proxy_timeout 3s;
		proxy_upload_rate 20K; 
		proxy_download_rate 20K;
        proxy_pass backend;
    }
}

三.Java程序分片

常量类 GeneralHttpConstant.java

package com.montnets.emp.util;

import org.omg.CORBA.Environment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class GeneralHttpConstant {

    /**
     * 链接超时时间，单位：秒
     */
    public static int CONNECT_TIMEOUT = 15;

    /**
     * 读取超时时间，单位：秒
     */
    public static int READ_TIMEOUT = 2 * 60;

    /**
     * 分次写入，单位：KB
     */
    public static int READ_SIZE = 40;

    /**
     * 每次写入后休眠时间，单位：毫秒
     */
    public static long SLEEP_TIME = 500;

    @Value("${general.http.connectTimeout}")
    public void setConnectTimeout(int connectTimeout) {
        CONNECT_TIMEOUT = connectTimeout;
    }
    @Value("${general.http.readTimeout}")
    public void setReadTimeout(int readTimeout) {
        READ_TIMEOUT = readTimeout;
    }
    @Value("${general.http.readSize}")
    public void setReadSize(int readSize) {
        READ_SIZE = readSize;
    }
    @Value("${general.http.sleepTime}")
    public void setSleepTime(long sleepTime) {
        SLEEP_TIME = sleepTime;
    }
}

发送实现 GeneralHttpUtils

package com.montnets.emp.util;

import com.montnets.emp.common.meditor.constant.RMSHttpConstant;
import com.montnets.emp.common.meditor.entity.JsonEntity;
import com.montnets.emp.common.meditor.entity.UploadTempParams;
import com.montnets.emp.common.meditor.util.MD5;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.message.BasicNameValuePair;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

/**
 * @author: 普通的http请求
 * @date: 2020/05/23
 */
@Slf4j
public class GeneralHttpUtils {

    private static Logger logger = LoggerFactory.getLogger(GeneralHttpUtils.class);


    /**
     * 重发2次
     * @param uri
     * @param charset
     * @param contentType
     * @param time
     * @return
     */
    public static String reSendPostSeg1(String uri, UploadTempParams obj, String pwd, String charset, String contentType, int time) throws Exception {
        String resp = "";
        for (int i = 0; i < time; i++) {
            logger.info("第 " + (i+1) + " 次发送请求，请求报文：" + (obj.toString().length() > 600 ? obj.toString().substring(0, 600) : obj.toString()));
            resp = sendPostSeg1(uri, obj, charset, contentType);
            logger.info("第 " + (i+1) + " 次响应报文：" + resp);
            if(StringUtils.isNotBlank(resp)){
                break;
            }
            // 重发
            UploadTempParams param = new UploadTempParams();
            param.setUserid(obj.getUserid());
            param.setPwd(MD5.getMD5Str(obj.getUserid().toUpperCase() + RMSHttpConstant.FIXATION_SEQUENCE + pwd + param.getTimestamp()));
            param.setContent(obj.getContent());
            param.setSign(MD5.getMD5Str(obj.getContent() + param.getTimestamp() + RMSHttpConstant.FIXATION_SEQUENCE));
            param.setSmcontent(obj.getSmcontent());
            param.setSmparamreg(obj.getSmparamreg());
            param.setTitle(obj.getTitle());
            param.setTmplver(obj.getTmplver());
            param.setOrigin(obj.getOrigin());
            obj = param;
        }
        return resp;
    }

    /**
     * 分片传输http数据
     *
     * @return
     */
    public static String sendPostSeg1(String uri, UploadTempParams obj, String charset, String contentType) {
        long l = System.currentTimeMillis();
        String result = "";
        InputStream in = null;
        ByteArrayInputStream bArray = null;
        BufferedOutputStream out = null;
        InputStreamReader isr = null;
        BufferedReader buffer = null;
        HttpURLConnection urlcon = null;
        List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
        JsonEntity jsonEntity = null;
        InputStream content = null;
        try {
            URL url = new URL(uri);
            logger.info("开始连接-->【" + uri + "】");
            urlcon = (HttpURLConnection) url.openConnection();
            logger.info("连接成功....");
            urlcon.setRequestMethod("POST");
            urlcon.setConnectTimeout(GeneralHttpConstant.CONNECT_TIMEOUT * 1000);
            urlcon.setReadTimeout(GeneralHttpConstant.READ_TIMEOUT * 1000);
            urlcon.setRequestProperty("Content-Type", contentType);
            // 富信模板上传服务端是短连接，此处与服务端一致
            urlcon.setRequestProperty("Connection", "close");
            urlcon.setRequestProperty("Accept-Encoding", "gzip,deflate");
            urlcon.setRequestProperty("Accept", "*");
            urlcon.setChunkedStreamingMode(1024 * GeneralHttpConstant.READ_SIZE);
//            urlcon.setRequestProperty("Cache-Control", null);
//            urlcon.setRequestProperty("Pragma", null);
            urlcon.setDoInput(true);
            urlcon.setDoOutput(true);
//            urlcon.setUseCaches(false);
            // 获取输出流，进行写数据
            //out = urlcon.getOutputStream();
             out = new BufferedOutputStream(urlcon.getOutputStream(),1024 * GeneralHttpConstant.READ_SIZE);
            int count = 0;
            int length = 0;
            // 数组大小
            int size = 1024 * GeneralHttpConstant.READ_SIZE;
            byte[] buf = new byte[size];
            parseParam(obj, params);
            jsonEntity = new JsonEntity(params, RMSHttpConstant.UTF8_ENCODE);
            content = jsonEntity.getContent();
            // 首先根据传递的字节数组将读取的字节的数量返回，在判断是否读取的空
            while ((length = content.read(buf)) != -1) {
                logger.info("第" + (++count) + "数据分片写入发送，length：" + length);
                out.write(buf, 0, length);

                out.flush();
//                out.close();
//                out=urlcon.getOutputStream();
//                urlcon.k
                Thread.sleep(GeneralHttpConstant.SLEEP_TIME);
            }
            // 获取输入流，获取响应
            in = urlcon.getInputStream();
            isr = new InputStreamReader(in, charset);
            buffer = new BufferedReader(isr);
            StringBuffer bs = new StringBuffer();
            String line = null;
            while ((line = buffer.readLine()) != null) {
                bs.append(line);
            }
            result = bs.toString();
        } catch (Exception e) {
            logger.error("[请求异常][地址：" + uri + "][错误信息：" + e.getMessage() + "]");
            result = "";
        } finally {
            try {
                if (null != buffer) {
                    buffer.close();
                }
            } catch (Exception e1) {
                logger.info("[关闭流异常][错误信息：" + e1.getMessage() + "]");
            }
            try {
                if (null != isr) {
                    isr.close();
                }
            } catch (Exception e2) {
                logger.info("[关闭流异常][错误信息：" + e2.getMessage() + "]");
            }
            try {
                if (null != in) {
                    in.close();
                }
            } catch (Exception e3) {
                logger.info("[关闭流异常][错误信息：" + e3.getMessage() + "]");
            }
            try {
                if (null != content) {
                    content.close();
                }
            } catch (Exception e13) {
                logger.info("[关闭流异常][错误信息：" + e13.getMessage() + "]");
            }
            try {
                if (null != bArray) {
                    bArray.close();
                }
            } catch (Exception e4) {
                logger.info("[关闭流异常][错误信息：" + e4.getMessage() + "]");
            }
            try {
                if (null != out) {
                    out.close();
                }
            } catch (Exception e5) {
                logger.info("[关闭流异常][错误信息：" + e5.getMessage() + "]");
            }
            try {
                if (null != urlcon) {
                    urlcon.disconnect();
                }
            } catch (Exception e6) {
                logger.info("[关闭HttpURLConnection异常][错误信息：" + e6.getMessage() + "]");
            }
        }
        logger.info("向【" + uri + "】发起http请求耗时：" + TimeFmtUtil.formatTime(System.currentTimeMillis()-l));
        return result;
    }

    /**
     * 重发2次
     * @param uri
     * @param msg
     * @param charset
     * @param contentType
     * @param time
     * @return
     */
    public static String reSendPostSeg(String uri, String msg, String charset, String contentType, int time){
        String resp = "";
        for (int i = 0; i < time; i++) {
            logger.info("第 " + (i+1) + " 次发送请求，请求报文：" + (msg.length() > 600 ? msg.substring(0, 600) : msg));
            resp = sendPostSeg(uri, msg, charset, contentType);
            logger.info("第 " + (i+1) + " 次响应报文：" + resp);
            if(StringUtils.isNotBlank(resp)){
                break;
            }
        }
        return resp;
    }

    /**
     * 分片传输http数据
     *
     * @return
     */
    public static String sendPostSeg(String uri, String msg, String charset, String contentType) {
        long l = System.currentTimeMillis();
        String result = "";
        InputStream in = null;
        ByteArrayInputStream bArray = null;
        OutputStream out = null;
        InputStreamReader isr = null;
        BufferedReader buffer = null;
        HttpURLConnection urlcon = null;
        try {
            URL url = new URL(uri);
            logger.info("开始连接-->【" + uri + "】");
            urlcon = (HttpURLConnection) url.openConnection();
            logger.info("连接成功....");
            urlcon.setRequestMethod("POST");
            urlcon.setConnectTimeout(GeneralHttpConstant.CONNECT_TIMEOUT * 1000);
            urlcon.setReadTimeout(GeneralHttpConstant.READ_TIMEOUT * 1000);
            urlcon.setRequestProperty("Content-Type", contentType);
            // 富信模板上传服务端是短连接，此处与服务端一致
            urlcon.setRequestProperty("Connection", "close");
            urlcon.setRequestProperty("Accept-Encoding", "gzip,deflate");
            urlcon.setRequestProperty("Accept", "*");
//            urlcon.setRequestProperty("Cache-Control", null);
//            urlcon.setRequestProperty("Pragma", null);
            urlcon.setDoInput(true);
            urlcon.setDoOutput(true);
//            urlcon.setUseCaches(false);
            // 获取输出流，进行写数据
            out = urlcon.getOutputStream();
            int count = 0;
            int length = 0;
            // 数组大小
            int size = 1024 * GeneralHttpConstant.READ_SIZE;
//            byte[] buf = new byte[size];
//            logger.info("长度："+msg.getBytes(charset).length);
//            bArray = new ByteArrayInputStream(msg.getBytes(charset));
//            // 首先根据传递的字节数组将读取的字节的数量返回，在判断是否读取的空
//            while ((length = bArray.read(buf)) != -1) {
//                logger.info("第" + (++count) + "数据分片写入发送，length：" + length);
//                out.write(buf, 0, length);
//                out.flush();
//                Thread.sleep(GeneralHttpConstant.SLEEP_TIME);
//            }
            byte[] bytes = msg.getBytes(charset);
            out.write(bytes);
            out.flush();
            out.close();
            // 获取输入流，获取响应
            in = urlcon.getInputStream();
            isr = new InputStreamReader(in, charset);
            buffer = new BufferedReader(isr);
            StringBuffer bs = new StringBuffer();
            String line = null;
            while ((line = buffer.readLine()) != null) {
                bs.append(line);
            }
            result = bs.toString();
        } catch (Exception e) {
            logger.error("[请求异常][地址：" + uri + "][错误信息：" + e.getMessage() + "]");
            result = "";
        } finally {
            try {
                if (null != buffer) {
                    buffer.close();
                }
            } catch (Exception e1) {
                logger.info("[关闭流异常][错误信息：" + e1.getMessage() + "]");
            }
            try {
                if (null != isr) {
                    isr.close();
                }
            } catch (Exception e2) {
                logger.info("[关闭流异常][错误信息：" + e2.getMessage() + "]");
            }
            try {
                if (null != in) {
                    in.close();
                }
            } catch (Exception e3) {
                logger.info("[关闭流异常][错误信息：" + e3.getMessage() + "]");
            }
            try {
                if (null != bArray) {
                    bArray.close();
                }
            } catch (Exception e4) {
                logger.info("[关闭流异常][错误信息：" + e4.getMessage() + "]");
            }
            try {
                if (null != out) {
                    out.close();
                }
            } catch (Exception e5) {
                logger.info("[关闭流异常][错误信息：" + e5.getMessage() + "]");
            }
            try {
                if (null != urlcon) {
                    urlcon.disconnect();
                }
            } catch (Exception e6) {
                logger.info("[关闭HttpURLConnection异常][错误信息：" + e6.getMessage() + "]");
            }
        }
        logger.info("向【" + uri + "】发起http请求耗时：" + TimeFmtUtil.formatTime(System.currentTimeMillis()-l));
        return result;
    }


    public static void parseParam(Object obj, List<BasicNameValuePair> params) throws NoSuchMethodException,
            IllegalAccessException, InvocationTargetException {
        // 设置请求的参数
        String fieldName = null;
        String fieldNameUpper = null;
        Method getMethod = null;
        Class cls = obj.getClass();
        Field[] fields = cls.getDeclaredFields();
        Object value = null;
        for (int i = 0; i < fields.length; i++) {
            fieldName = fields[i].getName();
            if (!"serialVersionUID".equals(fieldName)) {
                fieldNameUpper = Character.toUpperCase(fieldName.charAt(0)) + fieldName.substring(1);
                getMethod = cls.getMethod("get" + fieldNameUpper);
                value = getMethod.invoke(obj);
                if (value != null) {
                    params.add(new BasicNameValuePair(fieldName, String.valueOf(value)));
                }
            }
        }
    }

}

本文地址：https://blog.csdn.net/qq_36555327/article/details/107352471

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