小编2ac*_*ary的帖子

语法看起来对我来说,任何帮助将不胜感激!

mysql> select fieldnames from tablename limit 5;
+--------------------------------------------------------+
| fieldnames                                             |
+--------------------------------------------------------+
| {"example-field-1": "val2"}                            |
| {"example-field-2": "val1"}                            |
| {"example-field-1": "val1", "example-field-3": "val1"} |
| {"example-field-2": "val1"}                            |
| {"example-field-2": "val2"}                            |
+--------------------------------------------------------+
mysql> select JSON_EXTRACT(fieldnames, '$.example-field-1') from tablename;
ERROR 3143 (42000): Invalid JSON path expression. The error is around character position 17 in '$.example-field-1'.

MySQL 5.7.10

我正在尝试让 NGINX 检查请求标头user_header_token是否存在。如果它不存在，则重定向到登录站点。如果存在，请使用标头的值设置 cookie。当前设置的 cookie 是空的，而不是$http_我试图将其设置为的变量。有没有人看到我在做什么阻止将此 cookie 设置为标头的值？

http {
    include /etc/nginx/mime.types;
    server {
        listen 80;
        location / {
            if ($http_user_header_token = "") {
                rewrite ^.*$ https://loginsite.com/;
                return 403;
            }

            add_header Set-Cookie user_header_token=$http_user_header_token;

            root /usr/src/ui/;
            index index.html;
        }
    }
}