@SihenZhang and others noticed that some image hosts sites forbids (potential) non-human user agents (e.g. the one used by Java, which is java/1.8 or something alike) to retrieve the image, as a counter crawling/abuse measure.
While we recognize that there is the need of countering malicious bot and we should use our own image hosting services, allowing user to specify UA strings may serve a purpose in the unforeseeable future.
While we recognize that there is the need of countering malicious bot and we should use our own image hosting services, allowing user to specify UA strings may serve a purpose in the unforeseeable future.