location rewrite以及proxy_pass 的规则

Reverse proxy for a subdirectory

Here's an excerpt of a basic nginx configuration that proxies the URL "http://domain.com/couchdb" to "http://localhost:5984" so that requests appended to the subdirectory, such as "http://domain.com/couchdb/db1/doc1" are proxied to "http://localhost:5984/db1/doc1".

location /couchdb {
    rewrite /couchdb/(.*) /$1 break;
    proxy_pass http://localhost:5984;
    proxy_redirect off;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

rewrite放在location里 break标示就是匹配不再另匹配其他location和rewrite，但是改变了url，然后继续执行prox_pass。但是last标示就会停止匹配同一个location里的下一个rewrite但是它会继续

需找匹配其他location。