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我正在尝试制作可以将 youtube 视频下载为 mp3 文件的程序。为了实现这一目标，我使用了这个网站youtube-mp3.org。所以，我下载了www.youtube-mp3.org/?c#v=sTbd2e2EyTk的内容，其中 sTbd2e2EyTk 是视频 ID，现在我必须获取 mp3 文件的链接（在这种情况下为http://www.youtube-mp3.org /get?video_id..... ) 但下载的内容中没有链接。我注意到 chrome 开发人员工具（ctrl+shift+j，tab Elements）显示 chrome 中的链接和查看源（ctrl+u）选项给我的结果与我通过使用 java 下载页面得到的结果相同。我怎样才能得到那个链接？我尝试使用 JSoap 获取数据，但我需要的那些数据没有立即加载到页面上，所以我无法获取它们。

下一个代码用于下载网页内容...

 URL tU = new URL("http://www.youtube-mp3.org/?c#v=sTbd2e2EyTk");
 HttpURLConnection conn = (HttpURLConnection) tU.openConnection();
 InputStream ins = conn.getInputStream();
 BufferedReader rd = new BufferedReader(new InputStreamReader(ins));
 String line;
 StringBuffer content = new StringBuffer();
 while ((line = rd.readLine()) != null) {
     content.append(line);
 }
 System.out.println(content.toString());

我使用这种方法获取文件，但我需要链接..

   private static void downloadStreamData(String url, String fileName) throws Exception {
    URL tU = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) tU.openConnection();

    String type = conn.getContentType();
    InputStream ins = conn.getInputStream();
    FileOutputStream fout = new FileOutputStream(new File(fileName));
    byte[] outputByte = new byte[4096];
    int bytesRead;
    int length = conn.getContentLength();
    int read = 0;
    while ((bytesRead = ins.read(outputByte, 0, 4096)) != -1) {
        read += bytesRead;
        System.out.println(read + " out of " + length);
        fout.write(outputByte, 0, bytesRead);
    }
    fout.flush();
    fout.close();
}
4

2 回答 2

1

找到这个

package main.java.com.thezujev.theyoutubepld.logic;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.params.SyncBasicHttpParams;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
/**
* @author azujev
*
*/
public class YouTubeMP3 {
    public static String[] getLink(String url) throws ClientProtocolException, IOException {
        boolean passCode = false;
        String h = "";
        String title = "";
        String result = "";
        String[] returnVal = {"",""};
        Map<String, String> jsonTable;
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet httpInitialGet = new HttpGet("http://www.youtube-mp3.org/api/pushItem/?item=http%3A//www.youtube.com/watch%3Fv%3D" + url + "&xy=_");
        httpInitialGet.addHeader("Accept-Location", "*");
        httpInitialGet.addHeader("Referrer", "http://www.youtube-mp3.org");
        HttpParams params = new SyncBasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setUserAgent(params, "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1");
        httpInitialGet.setParams(params);
        HttpResponse firstResponse = httpClient.execute(httpInitialGet);

        try {
            if (firstResponse.getStatusLine().toString().contains("200")) {
                passCode = true;
            }
        } finally {
            httpInitialGet.releaseConnection();
        }

        if (passCode) {
            while (true) {
                HttpGet httpStatusGet = new HttpGet("http://www.youtube-mp3.org/api/itemInfo/?video_id=" + url + "&adloc=");
                httpStatusGet.addHeader("Accept-Location", "*");
                httpStatusGet.addHeader("Referrer", "http://www.youtube-mp3.org");
                httpStatusGet.setParams(params);
                HttpResponse secondResponse = httpClient.execute(httpStatusGet);
                HttpEntity secondEntity = secondResponse.getEntity();
                InputStream is = secondEntity.getContent();
                try {
                    BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
                    StringBuilder sb = new StringBuilder();
                    String line = null;
                    while ((line = reader.readLine()) != null) {
                        sb.append(line + "\n");
                        }
                        is.close();
                        result = sb.toString();
                } catch (Exception e) {
                    e.printStackTrace();
                }

                httpStatusGet.releaseConnection();
                result = result.replaceAll("\\}.*", "}");
                result = result.replaceAll(".*?\\{", "{");
                try {
                    JSONObject jsonData = new JSONObject(result);
                    JSONArray jsonArray = jsonData.names();
                    JSONArray valArray = jsonData.toJSONArray(jsonArray);
                    jsonTable = new HashMap<String, String>(jsonArray.length());
                    for (int i = 0; i < jsonArray.length(); i++) {
                        jsonTable.put(jsonArray.get(i).toString(), valArray.get(i).toString());
                    }
                    if (jsonTable.get("status").equals("serving")) {
                        h = jsonTable.get("h");
                        title = jsonTable.get("title");
                        break;
                    }
                } catch (JSONException e) {
                // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }
            returnVal[0] = "http://www.youtube-mp3.org/get?video_id=" + url + "&h=" + h;
            returnVal[1] = title;
            return returnVal;
        } else {
            //TODO: Error, vid not downloadable
        }
        return null;
    }
}
于 2015-04-03T22:20:18.223 回答
0

一个类似问题的答案：

关于 YouTube API 的服务条款

https://developers.google.com/youtube/terms/developer-policies

你不能：

分离、隔离或修改通过 YouTube API 提供的任何 YouTube 视听内容的音频或视频组件；

单独宣传通过 YouTube API 提供的任何 YouTube 视听内容的音频或视频组件；

（来源：https ://stackoverflow.com/a/26552805/5645656 ）

我的答案：

可以使用不同的服务。例如，您可以安装YouTube-DL并使用Process API来连接程序。

于 2020-03-25T17:38:50.757 回答