Java版本1.8.0_121,I see a solution for Java 9 only
说明
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 Downloads Stats API的API。
所以我创建了一个简单的程序,将结果看作原始文本,我不需要它作为JSON。
例如,我获取有关Apache OpenOffice次下载的信息以及更多信息 - > Link , you can try it to see
但我无法使用以下错误导致Java
原因获取数据。我已经在其他网站上对代码进行了测试,效果很好,但对于这个我不知道为什么。
Java代码:
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:
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)
上述解决方案将不胜感激。
尝试使用Andy的答案会产生同样的错误。
答案 0 :(得分:1)
将comment从@ GOXR3PLUS转换为答案:
升级到至少Java 8u161(或Java 9)会使SSLHandshakeException
消失,从SourceForge下载。
答案 1 :(得分:0)
您不能要求最终用户安装策略,但是有一些编程方式可以实施策略。 免责声明:不建议这样做,可能会产生TOS和ITAR影响。
在TLS协商之前在static
块中执行的代码应该允许JVM使用AES-256密码套件。
if (Cipher.getMaxAllowedKeyLength("AES") < 256) {
try {
Field field = Class.forName("javax.crypto.JceSecurity").
getDeclaredField("isRestricted");
field.setAccessible(true);
field.set(null, java.lang.Boolean.FALSE);
} catch (Exception e) {
fail("Could not override JCE cryptography strength policy setting");
fail(e.getMessage());
}
}
答案 2 :(得分:0)
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。
使用SourceForge为下载提供的svg image获取总下载次数是一种棘手的方法:
要获得
week/day/year
的下载量,您可以稍微更改一下 咬掉代码以删除不合适的文本。检查我所做的
BufferedReaded
返回的文字 总下载量。
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]);
}
}