问题
I was trying to help someone out with what I thought was a duplicate and a simple question, but it turned out to be slightly more complicated and I couldn't give a definite answer. Here is the original question.
I tried the code with different images on sites using the https protocol and none worked. I then took some images and added them to sites that use http protocol and they worked.
So, the questions is how do you load an image in a ImageView if the site hosting the image is using https protocol?
回答1:
It’s not an https issue. It seems cdn.discordapp.com requires a User-Agent header in the HTTP request. Furthermore, the site appears to only accept certain formats for User-Agent. It turns out the User-Agent supplied by wget is accepted:
Image createImage(String url)
throws IOException {
URLConnection conn = new URL(url).openConnection();
conn.setRequestProperty("User-Agent", "Wget/1.13.4 (linux-gnu)");
try (InputStream stream = conn.getInputStream()) {
return new Image(stream);
}
}
Without a User-Agent header in the request, the site gives an HTTP 403 Forbidden response.
来源：https://stackoverflow.com/questions/43285033/how-to-load-images-from-url-in-javafx-if-recieving-http-error-403