1、需求：
对web访问日志中的各字段识别切分，去除日志中不合法的记录，根据KPI统计需求，生成各类访问请求过滤数据
2、实现代码：
a) 定义一个bean，用来记录日志数据中的各数据字段
package cn.bigdta.hdfs.weblog;
public class WebLogBean {
private String remote_addr;// 记录客户端的ip地址
private String remote_user;// 记录客户端用户名称,忽略属性"-"
private String time_local;// 记录访问时间与时区
private String request;// 记录请求的url与http协议
private String status;// 记录请求状态；成功是200
private String body_bytes_sent;// 记录发送给客户端文件主体内容大小
private String http_referer;// 用来记录从那个页面链接访问过来的
private String http_user_agent;// 记录客户浏览器的相关信息
private boolean valid = true;// 判断数据是否合法
public String getRemote_addr() {
return remote_addr;
}
public void setRemote_addr(String remote_addr) {
this.remote_addr = remote_addr;
}
public String getRemote_user() {
return remote_user;
}
public void setRemote_user(String remote_user) {
this.remote_user = remote_user;
}
public String getTime_local() {
return time_local;
}
public void setTime_local(String time_local) {
this.time_local = time_local;
}
public String getRequest() {
return request;
}
public void setRequest(String request) {
this.request = request;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getBody_bytes_sent() {
return body_bytes_sent;
}
public void setBody_bytes_sent(String body_bytes_sent) {
this.body_bytes_sent = body_bytes_sent;
}
public String getHttp_referer() {
return http_referer;
}
public void setHttp_referer(String http_referer) {
this.http_referer = http_referer;
}
public String getHttp_user_agent() {
return http_user_agent;
}
public void setHttp_user_agent(String http_user_agent) {
this.http_user_agent = http_user_agent;
}
public boolean isValid() {
return valid;
}
public void setValid(boolean valid) {
this.valid = valid;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(this.valid);
sb.append("\001").append(this.remote_addr);
sb.append("\001").append(this.remote_user);
sb.append("\001").append(this.time_local);
sb.append("\001").append(this.request);
sb.append("\001").append(this.status);
sb.append("\001").append(this.body_bytes_sent);
sb.append("\001").append(this.http_referer);
sb.append("\001").append(this.http_user_agent);
return sb.toString();
}
}
View Code
b)定义一个parser用来解析过滤web访问日志原始记录
package cn.bigdta.hdfs.weblog;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
public class WebLogParser {
static SimpleDateFormat sd1 = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss", Locale.US);
static SimpleDateFormat sd2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static WebLogBean parser(String line) {
WebLogBean webLogBean = new WebLogBean();
String[] arr = line.split(" ");
if (arr.length > 11) {
webLogBean.setRemote_addr(arr[0]);
webLogBean.setRemote_user(arr[1]);
webLogBean.setTime_local(parseTime(arr[3].substring(1)));
webLogBean.setRequest(arr[6]);
webLogBean.setStatus(arr[8]);
webLogBean.setBody_bytes_sent(arr[9]);
webLogBean.setHttp_referer(arr[10]);
if (arr.length > 12) {
webLogBean.setHttp_user_agent(arr[11] + " " + arr[12]);
} else {
webLogBean.setHttp_user_agent(arr[11]);
}
if (Integer.parseInt(webLogBean.getStatus()) >= 400) {// 大于400，HTTP错误
webLogBean.setValid(false);
}
} else {
webLogBean.setValid(false);
}
return webLogBean;
}
public static String parseTime(String dt) {
String timeString = "";
try {
Date parse = sd1.parse(dt);
timeString = sd2.format(parse);
} catch (ParseException e) {
e.printStackTrace();
}
return timeString;
}
}
View Code
c) mapreduce程序
package cn.bigdta.hdfs.weblog;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
public class WeblogPreProcess {
static class WeblogPreProcessMapper extends Mapper<LongWritable, Text, Text, NullWritable> {
Text k = new Text();
NullWritable v = NullWritable.get();
@Override
protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String line = value.toString();
WebLogBean webLogBean = WebLogParser.parser(line);
//可以插入一个静态资源过滤（.....）
/*WebLogParser.filterStaticResource(webLogBean);*/
if (!webLogBean.isValid())
return;
k.set(webLogBean.toString());
context.write(k, v);
}
}
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
Job job = Job.getInstance(conf);
job.setJarByClass(WeblogPreProcess.class);
job.setMapperClass(WeblogPreProcessMapper.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(NullWritable.class);
FileInputFormat.setInputPaths(job, new Path("F:/weblog"));
FileOutputFormat.setOutputPath(job, new Path("F:/weblogOut"));
job.waitForCompletion(true);
}
}
