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package de.danoeh.antennapod.service.download;
import android.util.Log;
import de.danoeh.antennapod.BuildConfig;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.impl.client.DefaultRedirectHandler;
import org.apache.http.protocol.HttpContext;
import java.net.URI;
public class APRedirectHandler extends DefaultRedirectHandler {
// Identifier for logger
private static final String TAG = "APRedirectHandler";
// Header field, which has to be potentially fixed
private static final String LOC = "Location";
// Regular expressions for character strings, which should not appear in URLs
private static final String CHi[] = { "\\{", "\\}", "\\|", "\\\\", "\\^", "~", "\\[", "\\]", "\\`"};
private static final String CHo[] = { "%7B", "%7D", "%7C", "%5C", "%5E", "%7E", "%5B", "%5D", "%60"};
/**
* Workaround for broken URLs in redirection.
* Proper solution involves LaxRedirectStrategy() which is not available in
* current API yet.
*/
@Override
public URI getLocationURI(HttpResponse response, HttpContext context)
throws org.apache.http.ProtocolException {
Header h[] = response.getHeaders(LOC);
if (h.length>0) {
String s = h[0].getValue();
// Fix broken URL
for(int i=0; i<CHi.length;i++)
s = s.replaceAll(CHi[i], CHo[i]);
// If anything had to be fixed, then replace the header
if (!s.equals(h[0].getValue()))
{
if (BuildConfig.DEBUG)
Log.d(TAG, "Original URL: " + h[0].getValue());
response.setHeader(LOC, s);
if (BuildConfig.DEBUG)
Log.d(TAG, "Fixed URL: " + s);
}
}
// call DefaultRedirectHandler with fixed URL
return super.getLocationURI(response, context);
}
}
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