Nginx occurs with The plain HTTP request was sent to HTTPS port problem solving

Today in the configuration of Nginx + SSL when there is such as the problem of the error, and later baidu 1 after the rain to find a solution, very useful, conveniently.

1 in vhost configuration, there will be a segment of php parsed, such as:

location ~ .*\.(php|php5)?$

{

 try_files $uri =404;

 fastcgi_pass unix:/tmp/php-cgi.sock;

 fastcgi_param HTTPS $https if_not_empty;

 fastcgi_index index.php;

 include fcgi.conf;

}

Explanation:

Many people think fastcgi_param HTTPS on;

This is true, but forcing this parameter is not very effective!

The best answer is fastcgi_param HTTPS $https if_not_empty; (see nginx's official link below), https on is only automatically used when the https protocol is in place, otherwise fastcgi_param HTTPS parameter is ignored.

Inline variables:

The $https wok returns "ON" if the link is SSL, otherwise returns an empty string.

if_not_empty; The wok is passed to the server when the parameter has a value

Note: this method is only suitable for Nginx versions after 1.1.11

Reference:
stackoverflow/nginx#1/nginx#2