public boolean resourceExists()

in wagon-providers/wagon-http-lightweight/src/main/java/org/apache/maven/wagon/providers/http/LightweightHttpWagon.java [327:364]

29 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);
        }
    }