将查询字符串重写为路径参数 [英] Rewrite query string to path params

问题描述

我有以下 nginx 配置来托管我的图像服务:

I have the following configuration of nginx that hosts my image service:

    upstream thumbor {
        server localhost:8888;
    }

    server {
        listen       80;
        server_name  my.imageserver.com;
        client_max_body_size 10M;
        rewrite_log on;
        location ~ /images { 
            if ($arg_width="10"){
                rewrite ^/images(/.*)$ /unsafe/$1 last;
            }
            rewrite ^/images(/.*)$ /unsafe/$1 last;
        }
        location ~ /unsafe {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header HOST $http_host;
            proxy_set_header X-NginX-Proxy true;

            proxy_pass http://thumbor;
            proxy_redirect off;
        }

        location = /favicon.ico {
            return 204;
            access_log     off;
            log_not_found  off;
        }
    }

我正在尝试重写以下网址:

I am trying to rewrite the following urls:

来自

http://my.imageserver.com/images/Jenesis/EmbeddedImage/image/jpeg/jpeg/9f5d124d-068d-43a4-92c0-1c044584c54a.jpeg

到

http://my.imageserver.com/unsafe/Jenesis/EmbeddedImage/image/jpeg/jpeg/9f5d124d-068d-43a4-92c0-1c044584c54a.jpeg

这很容易，当我想允许应该像这样转到 url 路径的查询字符串时，问题就开始了:

which is quite easy, the problem begins when I want to allow query string that should go to the path of the url like so:

来自

http://my.imageserver.com/images/Jenesis/EmbeddedImage/image/jpeg/jpeg/9f5d124d-068d-43a4-92c0-1c044584c54a.jpeg?width=150&height=200&mode=smart

到

http://my.imageserver.com/unsafe/150x200/smart/Jenesis/EmbeddedImage/image/jpeg/jpeg/9f5d124d-068d-43a4-92c0-1c044584c54a.jpeg

如果查询字符串的顺序无关紧要会更好.

Also it will be better if the order of the query strings won't matter.

我尝试使用:$arg_width 但它似乎不起作用.

I tried using: $arg_width but it didn't seem to work.

在 ubuntu 上使用 nginx 1.6.1.

Using nginx 1.6.1 on ubuntu.

非常感谢您的帮助.

推荐答案

处理查询参数总是很困难(对于 Apache 也是如此).

Working with query arguments is always hard (this is also true with Apache).

但在你的例子中，当你这样做时:

But in your example when you do:

location ~ /images { 
    if ($arg_width="10"){
        rewrite ^/images(/.*)$ /unsafe/$1 last;
    }
    rewrite ^/images(/.*)$ /unsafe/$1 last;
}

我看不出 2 次重写之间有任何区别……所以这可能是它不起作用的原因.

I do not see any difference between the 2 rewrites... so that's maybe why it is not working.

无论如何，您可以尝试类似的方法(基于 这个线程):

Anyway you could maybe try something like that (based on this thread):

location ^~ /images {
    # get there only if we have a query string
    if ($is_args) {
        set $width ""; 
        set $height "";
        if ($args ~* "(?:^|&)width=([^&]+)") { 
            set $width $1; 
        }
        if ($args ~* "(?:^|&)height=([^&]+)") { 
            set $height $1; 
        }

        # string concatenation using sort of bash syntax
        set $dim "${width}x${height}";
        # maybe we should add a control here on $dim !='x'...

        # the ? here prevent query string from being appended
        rewrite ^/images(/.*)$ /unsafe/$dim/$1? last;
    }
    rewrite ^/images(/.*)$ /unsafe/$1 last;
} 
location ~ /unsafe {
    (...)

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