location 指令
只有正則匹配（ ~ 和 ~* ）才能使用正則子串
# cat regexp.conf
server {
listen 9998;
server_name _;
access_log logs/regexp_access.log main;
index index.html index.htm;
location ~ /hello/(.*)/$ {
set $word $1;
return 200 '$word\n';
}
}
# curl 127.0.0.1:9998/hello/nginx/
nginx
前綴匹配（^~ ）不能識(shí)別正則表達(dá)式 ，會(huì)把正則表達(dá)式當(dāng)成普通字符
# cat regexp.conf
server {
listen 9998;
server_name _;
access_log logs/regexp_access.log main;
index index.html index.htm;
location ^~ /hello/(.*)/$ {
set $word $1;
return 200 'test $word\n';
}
}
# curl 127.0.0.1:9998/hello/nginx/
<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>openresty</center>
</body>
</html>
# curl 127.0.0.1:9998/hello/(.*)/$
-bash: syntax error near unexpected token `('
# curl 127.0.0.1:9998/hello/\(.*\)/$
test
if 指令
if 的優(yōu)先級(jí)比 location 高，因?yàn)?if 指令在 ngx_http_server_rewrite_phase 階段，location 指令在 ngx_http_find_config_phase 階段。
if 指令可以使用正則子串
# cat regexp.conf
server {
listen 9998;
server_name _;
access_log logs/regexp_access.log main;
index index.html index.htm;
location ~ /hello/(.*)/$ {
set $word $1;
return 200 '$word\n';
}
if ($http_user_agent ~ curl/(.*)) {
set $curl_version $1;
return 200 'curl_version: $curl_version\n';
}
}
# curl 127.0.0.1:9998/hello/nginx/
curl_version: 7.29.0
# cat regexp.conf
server {
listen 9998;
server_name _;
access_log logs/regexp_access.log main;
index index.html index.htm;
location ~ /hello/(.*)/$ {
set $word $1;
return 200 '$word\ncurl_version: $curl_version\n';
}
if ($http_user_agent ~ curl/(.*)) {
set $curl_version $1;
}
}
# curl 127.0.0.1:9998/hello/nginx/
nginx
curl_version: 7.29.0
