setRequestMethod

setRequestMethod.groovy

// Custom HTTP request method
def setRequestMethod(HttpURLConnection c, String requestMethod) {
    try {
        final Object target;
        if (c instanceof HttpsURLConnectionImpl) {
            final Field delegate = HttpsURLConnectionImpl.class.getDeclaredField("delegate");
            delegate.setAccessible(true);
            target = delegate.get(c);
        } else {
            target = c;
        }
        final Field f = HttpURLConnection.class.getDeclaredField("method");
        f.setAccessible(true);
        f.set(target, requestMethod);
    } catch (IllegalAccessException | NoSuchFieldException ex) {
        throw new AssertionError(ex);
    }
}