Java - 获取脚本标签内的文本

Question

如何获取值(value)https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35在这个脚本中？第一个链接值https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886只是行不通。

    String html    ="<script>function getcookie(Name){\n" +
                    "  var search=Name+\"=\";\n" +
                    "  if(document.cookie.length>0){\n" +
                    "    offset=document.cookie.indexOf(search)\n" +
                    "    if(offset!=-1){\n" +
                    "      offset+=search.length\n" +
                    "      end=document.cookie.indexOf(\";\",offset)\n" +
                    "      if(end==-1){end=document.cookie.length}\n" +
                    "      return unescape(document.cookie.substring(offset, en))\n" +
                    "    }\n" +
                    "  }\n" +
                    "}\n" +
                    "   var player = new Playerjs({\n" +
                    "  \"id\":\"player\",\n" +
                    "  \"poster\":\"https://media.example.com/img/2147414277.jpg\",\n" +
                    "  \"file\":\"[SD (480p)]https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886 or https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35,[HD (720р)]https://example2.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886 or https://exampl3.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886&ip=190.9.117.35\",\n" +
                    "  \"default_quality\":\"SD (480p)\"\n" +
                    "  });\n" +
                    "  function PlayerjsEvents(event,id,data){\n" +
                    "   if(event==\"start\"){\n" +
                    "      var xhttp = new XMLHttpRequest();\n" +
                    "  xhttp.open(\"GET\", \"stat.php?id=2147414277\", true);\n" +
                    "  xhttp.send();\n" +
                    "   }\n" +
                    "   if(event==\"end\"){\n" +
                    "   \n" +
                    "   }\n" +
                    "   }</script>";


    Pattern p = Pattern.compile("file\"",Pattern.DOTALL);
    String url = "";

    for (Element element : script) {
        Matcher m = p.matcher(element.data());
            if (m.find()){
                url = m.group(1);
            }
    }
    System.out.println(url);

我不太明白 Java 正则表达式模式是如何工作的。我多次试图找到这个网址，但都失败了。如果有人能提供帮助，或者至少给我一个新手的 java 正则表达式链接指南，我将不胜感激。谢谢

Answer 1

在我看来，您正在尝试使用 java.lang.String 从 JS 代码中提取 URL。网络上有许多正则表达式 Playground ，您可以尝试，例如:

• http://buildregex.com
• https://regex101.com
• 当然还有 Google搜索。

对于您的具体情况:

import java.util.*;
import java.util.regex.*;  
import java.net.*;
public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
        String jsCode    ="<script>function getcookie(Name){\n" +
                    "  var search=Name+\"=\";\n" +
                    "  if(document.cookie.length>0){\n" +
                    "    offset=document.cookie.indexOf(search)\n" +
                    "    if(offset!=-1){\n" +
                    "      offset+=search.length\n" +
                    "      end=document.cookie.indexOf(\";\",offset)\n" +
                    "      if(end==-1){end=document.cookie.length}\n" +
                    "      return unescape(document.cookie.substring(offset, en))\n" +
                    "    }\n" +
                    "  }\n" +
                    "}\n" +
                    "   var player = new Playerjs({\n" +
                    "  \"id\":\"player\",\n" +
                    "  \"poster\":\"https://media.example.com/img/2147414277.jpg\",\n" +
                    "  \"file\":\"[SD (480p)]https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886 or https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35,[HD (720р)]https://example2.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886 or https://exampl3.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886&ip=190.9.117.35\",\n" +
                    "  \"default_quality\":\"SD (480p)\"\n" +
                    "  });\n" +
                    "  function PlayerjsEvents(event,id,data){\n" +
                    "   if(event==\"start\"){\n" +
                    "      var xhttp = new XMLHttpRequest();\n" +
                    "  xhttp.open(\"GET\", \"stat.php?id=2147414277\", true);\n" +
                    "  xhttp.send();\n" +
                    "   }\n" +
                    "   if(event==\"end\"){\n" +
                    "   \n" +
                    "   }\n" +
                    "   }</script>";




        List<String> urls = new ArrayList<String>();
       String myUrlPattern = "((https?|file):((//)|(\\\\))+[\\w\\d:#@%/;$()~_?\\+-=\\\\\\.&]*)";
        Pattern p = Pattern.compile(myUrlPattern);
        Matcher m = p.matcher(jsCode);
        while (m.find()) {
            urls.add(m.group());
        }
        for(String s: urls)
         System.out.println(s);

     }
}

给出:

• https://media.example.com/img/2147414277.jpg
• https://example.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886
• https://example1.com/2147414277.mp4?md5=OFvyZ55egHb4A5hUZJvSEQ&time=1580513886&ip=176.9.117.35 ,
• https://example2.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886
• https://exampl3.com/720/2147414277.mp4?md5=GXD4cKVnM5RVY363Uxn9ww&time=1580513886&ip=190.9.117.35

希望这有帮助!