如何通过Apache2发送压缩(放气)SVG? [英] How to send compressed (deflated) SVG via Apache2?

问题描述

我在网站的 .htaccess 文件中指定了以下属性:

I have specified the following attributes in my site's .htaccess file:

AddOutputFilterByType DEFLATE image/svg+xml
DeflateCompressionLevel 9
Header append Vary Accept-Encoding

但是，我的 SVG 资源并未以压缩形式发送:

However, my SVG asset is not being sent in compressed form:

$ curl https://example.org/assets/svg/asset.svg --silent -H "Accept-Encoding: gzip,deflate" --write-out "${size_download}\n" --output /dev/null                 
152655                                                                                                                                                                                                                                  
$ curl https://example.org/assets/svg/asset.svg --silent --write-out "%{size_download}\n" --output /dev/null
152655

我确认此资产 (asset.svg) 是使用 Chrome 以 MIME 类型 image/svg+xml 发送的，但使用 Web Developer 工具，此特定文件在发送到客户端时没有被压缩.

I verified that this asset (asset.svg) is being sent with MIME type image/svg+xml using Chrome, but using the Web Developer tools, this specific file is not being compressed when sent to the client.

将其他 MIME 类型添加到 .htaccess 文件是成功的(例如，添加 text/html 会压缩 HTML 资产).

Adding other MIME types to the .htaccess file is successful (e.g., adding text/html compresses the HTML assets).

这似乎特定于 SVG 数据的处理方式.我还可以尝试或排除哪些问题来使 SVG 压缩正常工作?

This seems specific to how SVG data are handled. What else can I try or troubleshoot to get SVG compression working?

推荐答案

如果 Apache 不知道文件的 mime 类型(这里是 image/svg+xml)，则需要具体告诉它(大多数 Apache 不需要):

If Apache doesn't know the mime type of the file (here image/svg+xml), you need to tell it specifically (not needed in most Apaches):

AddType image/svg+xml svg svgz

现在当 Apache 知道文件类型时，只需添加以下内容即可压缩它:

Now when Apache knows about the filetype, just add this to deflate it:

AddOutputFilterByType DEFLATE image/svg+xml

有关更多信息，请参阅 https://httpd.apache.org/docs/2.4/mod/mod_deflate.html

For more information see https://httpd.apache.org/docs/2.4/mod/mod_deflate.html

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