how to use the rule?

[liuyinltemp]

First is right:
xxx.com:443 {
tls /usr/local/bin/cert/xxx.crt /usr/local/bin/cert/xxx.key
root /www
gzip
index index.html
proxy / https://github.com
}
Next is wrong:
xxx.com:443 {
tls /usr/local/bin/cert/xxx.crt /usr/local/bin/cert/xxx.key
root /www
gzip
index index.html
proxy / https://github.com
filter rule {
path .*.html
search_pattern

replacement
}
}