nginx Content-Security-Policy Header仍然阻止引导CDN

Question

我的nginx.conf中有以下内容

add_header Content-Security-Policy 
"default-src 'self'; 
img-src 'self' 'unsafe-inline' 'unsafe-eval' data: *.printfriendly.com *.w.org *.gravatar.com *.vimeocdn.com; 
script-src 'self' 'unsafe-inline' 'unsafe-eval' *.w.org *.gravatar.com *.googleapis.com *.jsdelivr.net *.printfriendly.com *.kxcdn.com *.vimeocdn.com *.hs-analytics.net *.securitymetrics.com *.google-analytics.com; 
style-src 'self' 'unsafe-inline' *.googleapis.com *.bootstrapcdn.com *.gstatic.com *.vimeocdn.com; 
font-src 'self' data: *.googleapis.com *.bootstrapcdn.com *.gstatic.com *.googleapis.com; 
frame-src 'self' *.vimeocdn.com *.vimeo.com; 
object-src 'self'";

(我不得不多行才能使其清晰易读...

但是，在我的网站上，我仍然收到此错误：

Content Security Policy: The page’s settings blocked the loading of a resource at http://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css (“style-src”).

知道为什么会发生这种情况，当它被列入白名单时？

Answer 1

正如@tarun-lalwani所提到的，另一个块中的任何add_header指令都很重要。更准确地说，如果在后代块中使用add_header(对于任何标头(，则此内容安全策略将在此类后代块中丢弃。

文档摘录：

这些指令继承自上一级当且仅当 当前级别上没有定义add_header指令。

为了避免代码复制(DRY(，可以使用变量或include指令(或在广泛的情况下生成nginx配置(。

以防万一，在实际配置中不应使用多行标头值。通过curl -I https://example.com/path检查服务器响应。为了在配置中提高可读性，可以使用变量。

例：

set $CSP_image  "img-src      'self' 'unsafe-inline' 'unsafe-eval' data: *.printfriendly.com *.w.org *.gravatar.com *.vimeocdn.com; ";
set $CSP_script "script-src   'self' 'unsafe-inline' 'unsafe-eval' *.w.org *.gravatar.com *.googleapis.com *.jsdelivr.net *.printfriendly.com *.kxcdn.com *.vimeocdn.com *.hs-analytics.net *.securitymetrics.com *.google-analytics.com; ";
set $CSP_style  "style-src    'self' 'unsafe-inline' *.googleapis.com *.bootstrapcdn.com *.gstatic.com *.vimeocdn.com; ";
set $CSP_font   "font-src     'self' data: *.googleapis.com *.bootstrapcdn.com *.gstatic.com *.googleapis.com; ";
set $CSP_frame  "frame-src    'self' *.vimeocdn.com *.vimeo.com; ";
set $CSP_object "object-src   'self' ; ";
set $CSP        "default-src  'self' ; ${CSP_image} ${CSP_script} ${CSP_style} ${CSP_font} ${CSP_frame} ${CSP_object}";
add_header Content-Security-Policy $CSP;