package com.check;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;

import java.io.File;
import java.net.URL;
import java.util.*;

/**
 * 测试https是否可以访问
 *
 * @author weishaolei
 */
public class CheckHttpsUtils {

    public static void main(String[] args) throws Exception {
        //读取文件里的url
        URL resource = CheckHttpsUtils.class.getClassLoader().getResource("url.txt");
        List<String> urls = FileUtils.readLines(new File(resource.getFile()), "utf-8");
        List<String> errorList = new ArrayList();
        Collection<String> distinctUrl = getUrlList(urls);
        OkHttpClient client = new OkHttpClient();
        for (String url : distinctUrl) {
            try {
                //检测https的GET请求
                Request request = new Request.Builder()
                        .url(url)
                        .get()
                        .build();
                client.newCall(request).execute();
                System.out.println(url + " 成功支持HTTPS");
            } catch (Exception e) {
                System.out.println(url + "    不支持HTTPS, 错误原因: " + e.getMessage());
                errorList.add(url);
            }
        }
        if (errorList.isEmpty()) {
            System.out.println("所有域名都支持https.");
        } else {
            System.err.println("--------------------------------------------------------");
            System.err.println("--------------- 无法访问https的所有域名如下 ----------------");
            System.err.println("--------------------------------------------------------");
            for (String s : errorList) {
                System.err.println(s);
            }
        }
    }

    /**
     * 抽取域名, 并去重
     */
    private static Collection<String> getUrlList(List<String> urls) {
        Set<String> distinctUrl = new HashSet<>(); //去重
        for (String url : urls) {
            //去前后空格
            url = StringUtils.trimToNull(url);
            if (url == null) continue;
            //将http强转为https
            int i = url.indexOf("/", 10);
            if (i > 0) {
                url = url.substring(0, i);
            }
            url = url.toLowerCase();
            url = url.replace("http://", "https://");
            distinctUrl.add(url);
        }
        return distinctUrl;
    }

}