阻止Apache Commons VFS尝试使用SSL

Question

我试图使用Apache Commons VFS从http://openexchangerates.org API获取数据。我收到的错误意味着它试图使用SSL验证 - 而不是我通过我的网站计划提供的东西。有没有办法可以'强制'VFS使用http而不是https？

巨大的堆栈跟踪的相关要点如下包括 - 如果需要，可以提供更多的信息：

org.apache.commons.vfs2.VFS.getManager().resolveFile("http://openexchangerates.org/api/latest.json?api_id=MY_APP_ID") 
org.apache.commons.vfs2.FileSystemException: Could not connect to HTTP server on "openexchangerates.org". 

Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 

Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 

Answer 1

网站发送重定向到HTTPS版本。因此它不支持http。 http客户端将自动执行此重定向，您需要对其进行配置以进行适当的验证。

这里，我怎么选中此：

$ curl -v http://openexchangerates.org/api/latest.json?api_id=MY_APP_ID 
* Connected to openexchangerates.org (185.24.96.251) port 80 (#0) 
> GET /api/latest.json?api_id=MY_APP_ID HTTP/1.1 
> User-Agent: curl/7.30.0 
> Host: openexchangerates.org 
> Accept: */* 

< HTTP/1.1 301 Moved Permanently 
< Date: Mon, 05 Jan 2015 23:37:18 GMT 
< Server: Apache 
< Location: https://openexchangerates.org?missing_app_id=true