提示或報錯：

Mixed Content: The page at 'https://www.example.com' was loaded over HTTPS, but requested an insecure image ‘http://static.example.com/test.jpg’. This content should also be served over HTTPS.

首先，為了解決樣式問題，我在前端頁面，引入了一個meta

<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests" />

等效于用PHP設置頭部

header("Content-Security-Policy: upgrade-insecure-requests");

這樣導致了一個問題，我的測試環境下并沒有ssl證書，因此又冒出很多問題。

后面在nginx上做處理。一個nginx的配置

server {

        listen       443;

        server_name  www.example.com;

        #charset koi8-r;

        error_log  /logs/nginx/error.log;

        root /var/www/www.example.com;

        index  index.php index.html index.htm;

        ssl on;

        ssl_certificate   cert/test/test.pem;

        ssl_certificate_key  cert/test/test.key;

        ssl_session_timeout 5m;

        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

        ssl_prefer_server_ciphers on;

        add_header  X-Frame-Options  deny;

        add_header  X-Content-Type-Options  nosniff;

        add_header  X-XSS-Protection "1; mode=block";

        add_header Strict-Transport-Security max-age=86400;

        add_header Content-Security-Policy "upgrade-insecure-requests;default-src *;script-src 'self' https://static.example.com http://static.example.com 'unsafe-inline' 'unsafe-eval';style-src https://static.example.com http://static.example.com 'self' 'unsafe-inline';frame-src 'self';connect-src 'self';img-src https://static.example.com http://static.example.com data: blob: 'self'";

        location / {

                if (!-f $request_filename){

                        rewrite ^/(.*)$ /index.php?s=$1 last;

                        break;

                }

                limit_except GET POST DELETE PUT {

                        deny all;

                }

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

                        root   html;

        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80

        #

        #location ~ \.php$ {

        #    proxy_pass   http://127.0.0.1;

        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

        #

        location ~ \.php$ {

                        fastcgi_pass   127.0.0.1:9000;

                        fastcgi_index  index.php;

                        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;

                        include        fastcgi_params;

        }

        # deny access to .htaccess files, if Apache's document root

        # concurs with nginx's one

        #

        location ~ /\.ht {

                        deny  all;

        }

}