从HttpURLConnection获取数据作为文本抛出SourceForge.net的javax.net.ssl.SSLHandshakeException [英] Fetching data from HttpURLConnection as text throws javax.net.ssl.SSLHandshakeException for SourceForge.net

问题描述

Java Version 1.8.0_121，我只看到了Java 9的解决方案

Java Version 1.8.0_121 , I see a solution for Java 9 only

描述：

Description:

我的目标是获取有关 SourceForge 项目的信息，例如项目的总下载量。
SourceForge 有一个名为 SourceForge下载统计API 。

My goal is to get informations about SourceForge Projects , such as the total downloads of a Project . SourceForge has an API for that called SourceForge Downloads Stats API .

所以我创建了一个简单的程序，将结果视为原始文本，我没有必要将它作为JSON。

So i created a simple program see the result as raw text , i don't necessary need it as JSON .

例如我获取有关 Apache的信息OpenOffice 下载等等 - > 链接，您可以尝试查看

For example i am gettings information about Apache OpenOffice downloads and many more -> Link , you can try it to see

但我无法使用 Java 以下错误原因。我已经测试了其他网站的代码并且运行良好，但对于这个我不知道原因。

But i can't fetch the data using Java cause of the error below . I have tested the code with other websites and it works well , but for this one i don't know why .

Java代码：

Java Code:

import java.net.*;
import java.io.*;

public class URLReader {
    public static void main(String[] args) throws Exception {

        //Create HttpURLConnection 
        HttpURLConnection httpcon = (HttpURLConnection) new URL(
                "https://sourceforge.net/projects/openofficeorg.mirror/files/stats/json?start_date=2014-10-29&end_date=2014-11-04").openConnection();
        //In case it might to the trick...
        httpcon.addRequestProperty("User-Agent", "Mozilla/5.0");
        //Read the inputstream
        BufferedReader in = new BufferedReader(new InputStreamReader(httpcon.getInputStream()));

        //Print everything
        String inputLine;
        while ( ( inputLine = in.readLine() ) != null)
            System.out.println(inputLine);
        in.close();
    }
}

错误：

Error:

Exception in thread "main" javax.net.ssl.SSLHandshakeException: Received fatal a
lert: handshake_failure
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)
    at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:13
75)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Abstra
ctDelegateHttpsURLConnection.java:185)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnectio
n.java:1546)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
.java:1474)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLCon
nectionImpl.java:254)
    at aaTester.URLReader.main(URLReader.java:13)

最后

上述解决方案将不胜感激。

Finally

A solution on the above will be greatly appreciated .

尝试使用Andy的答案会产生同样的错误。

Trying using Andy's answer produces the same error.

推荐答案

以下仅用于获取我实际需要的下载量。所以这不是完整的答案。

The below is only for getting the downloads which i actually needed. So this is not the complete answer.

这是使用总下载量的一种棘手方法SourceForge提供下载的/img.shields.io/sourceforge/dt/xr3player.svg\"rel =nofollow noreferrer> svg图像：

Here is a tricky way to get the Total downloads using the svg image that SourceForge is providing for downloads :

要获得每个周/日/年的下载，您只需更改一些
位代码即可删除不合适的文本。

To get the downloads per week/day/year you can just change a little bit the code to remove the innapropriate text.

检查从 BufferedReaded 返回的文本，就像我为
总下载量所做的那样。

Check the text that is returned from the BufferedReaded as i did for total downloads.

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Arrays;


public class URLReader {
    public static void main(String[] args) throws Exception {

        //System.out.println(Cipher.getMaxAllowedKeyLength("AES"));

        //Create HttpURLConnection  
        HttpURLConnection httpcon = (HttpURLConnection) new URL("https://img.shields.io/sourceforge/dt/xr3player.svg").openConnection();
        httpcon.addRequestProperty("User-Agent", "Mozilla/5.0");
        BufferedReader in = new BufferedReader(new InputStreamReader(httpcon.getInputStream()));

        //Read line by line
        String line = "" , inputLine;
        while ( ( inputLine = in.readLine() ) != null) {
            line += "\n" + inputLine;
            System.out.println(inputLine);
        }
        in.close();

        //Get SourceForge Downloads 
        System.out.println("Total Downlads: "+line.split("<text x=\"98.5\" y=\"14\">")[1].split("/total")[0]);
    }

}

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