is shown below because of the Content-Type: image/gif header.
$ curl -I -X GET http://cdn.aixifan.com/dotnet/artemis/u/cms/www/201512/18171819tvawkism.gif?imageView2/1/w/40/h/40
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 44199 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0HTTP/1.1 200 OK
Date: Wed, 30 Nov 2016 14:49:22 GMT
Content-Type: image/gif
Content-Length: 44199
Connection: keep-alive
Expires: Wed, 24 May 2017 04:00:09 GMT
Server: nginx/1.8.0
Last-Modified: Fri, 18 Dec 2015 09:16:24 GMT
ETag: "5673cee8-aca7"
Cache-Control: max-age=20736000
Accept-Ranges: bytes
X-Ser: BC81_dx-lt-hebei-shijiazhuang-2-cache-1, BC79_dx-beijing-beijing-4-cache-1, BC250_KR-seoul-seoul-1-cache-2, BC136_SG-singapore-singapore-1-cache-1
Moreover, the reason why the pictures you usually see are displayed as pictures by the browser is usually because the web server such as apache or nginx outputs the MIME-Type for you, or because it is written in <img src="xxx">. Please check the nginx configuration: include /etc/nginx/mime.types; Among them, /etc/nginx/mime.types this file records the association between most common file extensions and MIME types. If the file suffix requested by the client is in this file, nginx will output the corresponding content-type header for you.
? Isn’t the previous one .gif? The previous gif already represents the suffix of the file ? The following content is called passing parameters
Besides, just output the header of Content-Type: image/gifContent-Type: image/jpg, even if the suffix is php, for example: https://www.load-page.com/base/attachment?id=777
And even if there is no suffix, the gateway server (apache/nginx) can help you find the image. In Linux, files are not distinguished by file name suffixes.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
is shown below because of the
Content-Type: image/gifheader.Moreover, the reason why the pictures you usually see are displayed as pictures by the browser is usually because the web server such as apache or nginx outputs the MIME-Type for you, or because it is written in
<img src="xxx">. Please check the nginx configuration:include /etc/nginx/mime.types;Among them,/etc/nginx/mime.typesthis file records the association between most common file extensions and MIME types. If the file suffix requested by the client is in this file, nginx will output the correspondingcontent-type headerfor you.If your doubts are answered, please accept it
?Isn’t the previous one .gif? The previous gif already represents the suffix of the file?The following content is called passing parametersBesides, just output the header of
Content-Type: image/gifContent-Type: image/jpg, even if the suffix is php,for example:
https://www.load-page.com/base/attachment?id=777See?
And even if there is no suffix, the gateway server (apache/nginx) can help you find the image. In Linux, files are not distinguished by file name suffixes.