在浏览器中,导航到此 URL 会启动 302(暂时移动)请求,该请求又会下载文件。
http://www.targetsite.com/target.php/?event=download&task_id=123
当我通过 Chrome 网络工具查看实际发生的情况时,我发现重定向将转到动态生成的路径,该路径在下载后立即取消。换句话说,即使我知道完整路径,我也没有时间手动调用它。
那么,如何使用命令行来模仿浏览器操作?
我试过了
curl --cookies bin/cookies.txt -O -L "http://www.targetsite.com/target.php/?event=download&task_id=123" --压缩
但这只会返回乱码。这样做的目的是以编程方式下载该文件,而无需导航到该站点。不幸的是,我无法在这里分享该网站,因为它需要登录。
您需要提供
-L
或 --location
选项才能启用 curl
遵循 HTTP 重定向。
引用
man curl
:
-L, --location
(HTTP/HTTPS) If the server reports that the requested page has
moved to a different location (indicated with a Location: header
and a 3XX response code), this option will make curl redo the
request on the new place. If used together with -i, --include or
-I, --head, headers from all requested pages will be shown. When
authentication is used, curl only sends its credentials to the
initial host. If a redirect takes curl to a different host, it
won't be able to intercept the user+password. See also --loca‐
tion-trusted on how to change this. You can limit the amount of
redirects to follow by using the --max-redirs option.
When curl follows a redirect and the request is not a plain GET
(for example POST or PUT), it will do the following request with
a GET if the HTTP response was 301, 302, or 303. If the response
code was any other 3xx code, curl will re-send the following
request using the same unmodified method.