如何根据标题args – nginx重写动态更改文件名

我正在使用Nginx web服务器提供.pdf文件.并使用重写规则设置.pdf文件的文件名,具体取决于标题args.

我想要做的是,在文件名中添加我的域名example.com

1.如果title var包含example.com,则使用title var data作为filename.

例如

URL : http://example.com/pdf/0D2E8C9DC2F732A6ACC6150811515F697E3C376C.pdf?title=[example.com]ebook
Filename : [example.com]ebook.pdf

2.如果title var中不包含example.com,则将文件名设为[example.com] title var.pdf

例如

URL : http://example.com/pdf/0D2E8C9DC2F732A6ACC6150811515F697E3C376C.pdf?title=ebook
Filename : [example.com]ebook.pdf

3.如果未设置title,则使用filename作为[example.com] hash.pdf文件名.

例如

URL : http://example.com/pdf/0D2E8C9DC2F732A6ACC6150811515F697E3C376C.pdf
Filename : [example.com]0D2E8C9DC2F732A6ACC6150811515F697E3C376C.pdf

我怎样才能实现这样的目标. ？

我当前的配置看起来像这样

#pdf download block
location ~* /pdf/([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F]+)\.pdf${

#if title is not set then use hash.pdf as filename
if ( $arg_title  = '' ) {
    add_header Content-disposition 'attachment; filename="[example.com]$1$2$3$4$5$6.pdf"';
}

add_header Content-disposition 'attachment; filename="[example.com]$arg_title.pdf"';
alias   /var/www/example.com/pdf/$1/$2/$3/$4/$5/$1$2$3$4$5$6.pdf;
expires 1y;
}

上面的代码只有在没有设置title var的情况下才能正常工作,但如果我将title var设置为[example.com] ebook.pdf,它会再次添加域名,最终的文件名变为

[example.com][example.com]ebook.pdf 

据我所知,我们可以假设如果在$arg_title变量的开头有一个[example.com]子字符串,我们可以安全地将其删除.
所以这是你需要的配置：

location ~* /pdf/([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F]+)\.pdf${

 #First of all we should put pdf path from the request into a variable,#since $1,$2,$n would contain other data later:
set $hashpath $1/$2/$3/$4/$5/$1$2$3$4$5$6;

 #Same applies to hash title:
set $hashtitle $1$2$3$4$5$6;

 #Now we try to get the title argument without getting [example.com] in the beginning:
if ( $arg_title ~ "^(\[example\.com\])?(.*)$")
{
   #This way if title contained [example.com],it would go to $1 variable,while $2 has our new cleaned title:
  set $pdftitle $2;
}

 #Now we check if title was empty:
if ( $arg_title  = '' ) {
 #and assign our title that $hashtitle variable we got from the request earlier:
    set $pdftitle $hashtitle;
}

 #also we check if title has only [example.com] without anything else:
if ( $arg_title  = '[example.com]' ) {
    set $pdftitle $hashtitle;
}

 #After that we can safely put [example.com] in front of our filename,without worrying that there would be a double:
add_header Content-disposition 'attachment; filename="[example.com]$pdftitle.pdf"';

alias /var/www/example.com/pdf/$hashpath.pdf;
expires 1y;
}

适用于Nginx 1.9.12这里：

title=[example.com]test

title=just_test

title is not set

实际文件位于here

原文地址：https://www.jb51.cc/nginx/435606.html