Content-Type:图片的可靠性? [英] Reliability of Content-Type: image?

问题描述

如果页面的内容类型是图像，则标题实际上指示它是图像有多可靠?我是否应该将此作为确定页面(URL)是否为图像的唯一方法?

If the content type of a page is an image, how reliable is it that the headers will actually indicate that it is an image? Should I use this as the sole method for determining if a page (URL) is an image?

推荐答案

好消息是，我经常看到内容类型错误的图像，而不是非图像.图片内容类型.因此，我认为图片"内容类型是一个很好的指标.

The good news is that I've usually seen images with the wrong Content Type more often than I've seen non-images with the image Content Type. So I would that the "image" Content Type is a pretty good indicator.

我很好奇.如果您已经遇到了请求资源的麻烦，那么下载整个文件以测试它是否是映像有什么大不了的?

I'm curious though. If you're already going through the trouble of requesting a resource, what's the big deal with downloading the whole thing to test if it's an image?

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