Ratpack HTTP Proxy
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import org.slf4j.Logger | |
import org.slf4j.LoggerFactory | |
import ratpack.handling.Context | |
import ratpack.handling.Handler | |
import ratpack.http.client.HttpClient | |
import ratpack.http.client.StreamedResponse | |
import ratpack.http.MutableHeaders | |
import ratpack.http.client.RequestSpec | |
import static ratpack.groovy.Groovy.ratpack | |
final Logger log = LoggerFactory.getLogger(Ratpack.class); | |
class BlockedHostHandler implements Handler { | |
def blockedHosts = ['www.asos.co.uk'] | |
@Override | |
void handle(Context context) throws Exception { | |
if (blockedHosts.contains(context.request.headers.host)) { | |
context.redirect(302, "http://ratpack-foaas.herokuapp.com/you/no $context.request.headers.host allowed/the Boss") | |
} | |
context.next() | |
} | |
} | |
ratpack { | |
handlers { | |
handler new BlockedHostHandler() | |
handler { HttpClient httpClient -> | |
log.info("Proxy to: $request.rawUri") | |
httpClient.streamRequest(new URI(request.rawUri)) { RequestSpec spec -> | |
spec.headers.copy(request.headers) | |
} then { StreamedResponse responseStream -> | |
responseStream.send(response) { MutableHeaders headers -> | |
def via = '1.1 Ratpack Proxy' | |
via = headers.get('Via') ? via + ', ' + headers.get('Via') : via | |
headers.set('Via', via) | |
} | |
} | |
} | |
} | |
} |
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