package org.yeshi.utils.statistic.http;
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import java.util.List;
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public class LocalhostAccessLogUtil {
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/**
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* 将单行日志文件解析为对象
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*
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* @param content
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* @return
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*/
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public static HttpRequestInfo parseTomcatSingleLine(String content) {
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try {
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HttpRequestInfo info = new HttpRequestInfo();
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int start = content.indexOf("\"");
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content = content.substring(start, content.length());
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start = content.indexOf("\"", 1);
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String url = content.substring(1, start);
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info.setMethod(url.split(" ")[0]);
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// 链接
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info.setUrl(url.split(" ")[1].split("\\?")[0]);
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// 时间
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info.setProtocal(url.split(" ")[2]);
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String[] sts = content.substring(start + 1, content.length()).trim().split(" ");
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info.setStateCode(Integer.parseInt(sts[0]));
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info.setTime(sts[1].trim().equalsIgnoreCase("-") ? Integer.MAX_VALUE : Integer.parseInt(sts[1]));
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return info;
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} catch (Exception e) {
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}
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return null;
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}
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/**
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* 求请求时间的平均值
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*
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* @param list
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* @return
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*/
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public static int getTimeAvg(List<HttpRequestInfo> list) {
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int count = 0;
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long total = 0;
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for (HttpRequestInfo info : list) {
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// 去除最大数值与最小数值
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if (info.getTime() > 0 && info.getTime() < Integer.MAX_VALUE) {
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total += info.getTime();
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count++;
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}
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}
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if (count <= 0)
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return 0;
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return (int) (total / count);
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}
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/**
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* 获取方差
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*
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* @param list
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* @return
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*/
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public static int getVariance(List<HttpRequestInfo> list) {
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int avg = getTimeAvg(list);
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long total = 0;
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for (HttpRequestInfo info : list) {
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total += Math.pow(info.getTime() - avg, 2);
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}
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return (int) (total / list.size());
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}
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}
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