public boolean resourceExists()

in wagon-providers/wagon-http-lightweight/src/main/java/org/apache/maven/wagon/providers/http/LightweightHttpWagon.java [385:428]

35 lines of code
8 McCabe index (conditional complexity)


    public boolean resourceExists( String resourceName )
        throws TransferFailedException, AuthorizationException
    {
        HttpURLConnection headConnection;

        try
        {
            Resource resource = new Resource( resourceName );
            URL url = new URL( buildUrl( resource ) );
            headConnection = (HttpURLConnection) url.openConnection( this.proxy );

            addHeaders( headConnection );

            headConnection.setRequestMethod( "HEAD" );

            int statusCode = headConnection.getResponseCode();
            String reasonPhrase = headConnection.getResponseMessage();

            switch ( statusCode )
            {
                case HttpURLConnection.HTTP_OK:
                    return true;

                case HttpURLConnection.HTTP_NOT_FOUND:
                case HttpURLConnection.HTTP_GONE:
                    return false;

                // TODO Move 401/407 to AuthenticationException after WAGON-587
                case HttpURLConnection.HTTP_FORBIDDEN:
                case HttpURLConnection.HTTP_UNAUTHORIZED:
                case HttpURLConnection.HTTP_PROXY_AUTH:
                    throw new AuthorizationException( formatAuthorizationMessage( buildUrl( resource ),
                            statusCode, reasonPhrase, getProxyInfo() ) );

                default:
                    throw new TransferFailedException( formatTransferFailedMessage( buildUrl( resource ),
                            statusCode, reasonPhrase, getProxyInfo() ) );
            }
        }
        catch ( IOException e )
        {
            throw new TransferFailedException( "Error transferring file: " + e.getMessage(), e );
        }
    }