如果收到 HTTP 错误 403,如何从 JavaFx 中的 URL 加载图像 [英] How to load images from URL in JavaFx if recieving HTTP Error 403

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问题描述

我试图帮助某人解决我认为是重复和简单的问题,但结果证明稍微复杂一些,我无法给出明确的答案.这里是原始问题.>

我在网站上使用 https 协议尝试了不同图像的代码,但没有任何效果.然后我拍摄了一些图像并将它们添加到使用 http 协议的站点,并且它们起作用了.

那么,问题是,如果托管图像的站点使用 https 协议,您如何在 ImageView 中加载图像?

解决方案

这不是 https 问题.似乎 cdn.discordapp.com 在 HTTP 请求中需要 User-Agent 标头.此外,该站点似乎只接受用户代理的某些格式.结果证明 wget 提供的 User-Agent 被接受:

Image createImage(String url)抛出 IOException {URLConnection conn = new URL(url).openConnection();conn.setRequestProperty("User-Agent", "Wget/1.13.4 (linux-gnu)");尝试 (InputStream 流 = conn.getInputStream()) {返回新图像(流);}}

如果请求中没有 User-Agent 标头,网站会给出 HTTP 403 Forbidden 响应.

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?

解决方案

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.

这篇关于如果收到 HTTP 错误 403,如何从 JavaFx 中的 URL 加载图像的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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