Regular expression length syntax not working?

[jakewow]

For those who are looking for the answer:

> A regular expression containing the characters “{” and “}” should be
quoted.

So, his location directive:
location ~ ^/event/[0-9,A-Z]{16}/info$ { 
    proxy_pass http://localhost:7777; 
} 

Should look like this in order to work:
location ~ "^/event/[0-9,A-Z]{16}/info$" { 
    proxy_pass http://localhost:7777; 
}

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,255413,277974#msg-277974