Re: permission denied:connect when reading an image attachment from java

[Robert Newson]

Sounds like java sandboxing to me. i.e, you are running with a
security manager that prevents connecting to that site. Applets, for
example, are only allowed to make connections to the site they are
served from.

B.

On 28 October 2011 13:17, Gregory Hamel <g...@itactual.com.my> wrote:
> I'm testing couchDb for use in my java app and I can't seem to read document
> attachments using plain old Java http.
>
> I have a good understanding of couch and for this test I've setup a new
> dbase with a single doc having a single image attached. I can get the image
> from couch using a browser and using curl, both without authentication, so I
> know that my uri is correct and I know there is no security on the dbase.
>
> However.. When I try to read the image using java i get a permission denied
> exception at the socket level and the Erlang console (ya its windoze)
> doesn't log anything at all. Yet this code *will* pull an image from another
> website.
>
> Is there some additional header that I need to setup on my connection before
> connecting?
>
> Here's the relevant portion of my code and the resulting stacktrace..
>
>   // this fails
>   try {
>           URL u = new URL("http://192.168.1.7:5984/test/img/jv0h.jpg";);
>           HttpURLConnection conn = (HttpURLConnection)u.openConnection();
>           conn.setRequestMethod("GET");
>           conn.connect();
>           image1 = ImageIO.read(conn.getInputStream());
>     } catch (IOException e) {
>         e.printStackTrace();
>     }
>
>     // and this fails
>     try {
>         URL url2 = new URL("http://192.168.1.7:5984/test/img/jv0h.jpg";);
>         image2 = ImageIO.read(url2);
>     } catch (IOException e) {
>         e.printStackTrace();
>     }
>
>     // but this works
>     try {
>         URL url2 = new URL("http://java.com/images/jv0h.jpg";);
>         image3 = ImageIO.read(url2);
>     } catch (IOException e) {
>         e.printStackTrace();
>     }
>
>
> javax.imageio.IIOException: Can't get input stream from URL!
>     at javax.imageio.ImageIO.read(ImageIO.java:1395)
>     at test1.ShowImage.<init>(ShowImage.java:25)
>     at test1.ShowImage.main(ShowImage.java:40)
> Caused by: java.net.SocketException: Permission denied: connect
>     at java.net.DualStackPlainSocketImpl.connect0(Native Method)
>     at
> java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
>     at
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:337)
>     at
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:198)
>     at
> java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
>     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
>     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
>     at java.net.Socket.connect(Socket.java:579)
>     at java.net.Socket.connect(Socket.java:528)
>     at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
>     at sun.net.www.http.HttpClient.openServer(HttpClient.java:388)
>     at sun.net.www.http.HttpClient.openServer(HttpClient.java:483)
>     at sun.net.www.http.HttpClient.<init>(HttpClient.java:213)
>     at sun.net.www.http.HttpClient.New(HttpClient.java:300)
>     at sun.net.www.http.HttpClient.New(HttpClient.java:316)
>     at
> sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:992)
>     at
> sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:928)
>     at
> sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:846)
>     at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1296)
>     at java.net.URL.openStream(URL.java:1035)
>     at javax.imageio.ImageIO.read(ImageIO.java:1393)
>     ... 2 more
>
>