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e82a40a2fb
This fixes #23 for @parsoj by allowing a custom disclaimer to be specified via dependency injection modules. By making the disclaimer part of the dependency injection graph, it can come from anywhere. For example, if I was Donuts, I would have my own repository. I'd use an external http_archive() repository for Domain Registry. Then I would write my own Dagger @Component for each App Engine module. My Component would have a list of Dagger Modules, which I copied from the Domain Registry version. Then I would swap out ConfigModule with my own DonutsConfigModule, which provides the same values. So long as a method exists that @Provides @Config("whoisRegistry"), and the module containing it is listed in the @Component, the dependency injection graph becomes valid and complete for the whois package (provided other dependencies are met.) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=128082921
90 lines
3.4 KiB
Java
90 lines
3.4 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.whois;
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import static google.registry.request.Action.Method.POST;
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import static javax.servlet.http.HttpServletResponse.SC_OK;
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import com.google.common.net.MediaType;
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import google.registry.config.ConfigModule.Config;
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import google.registry.request.Action;
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import google.registry.request.Response;
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import google.registry.util.Clock;
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import google.registry.util.FormattingLogger;
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import java.io.Reader;
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import javax.inject.Inject;
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import org.joda.time.DateTime;
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/**
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* HTTP request handler for WHOIS protocol requests sent to us by a proxy.
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*
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* <p>All commands and responses conform to the WHOIS spec as defined in RFC 3912. Commands must
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* be sent via an HTTP POST in the request body.
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*
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* <p>This servlet is meant to serve as a low level interface for the proxy app which forwards us
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* requests received on port 43. However this interface is technically higher level because it
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* sends back proper HTTP error codes such as 200, 400, 500, etc. These are discarded by the proxy
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* because WHOIS specifies no manner for differentiating successful and erroneous requests.
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*
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* @see WhoisHttpServer
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* @see <a href="http://www.ietf.org/rfc/rfc3912.txt">RFC 3912: WHOIS Protocol Specification</a>
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*/
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@Action(path = "/_dr/whois", method = POST)
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public class WhoisServer implements Runnable {
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private static final FormattingLogger logger = FormattingLogger.getLoggerForCallerClass();
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/** WHOIS doesn't define an encoding, nor any way to specify an encoding in the protocol. */
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static final MediaType CONTENT_TYPE = MediaType.PLAIN_TEXT_UTF_8;
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/**
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* As stated above, this is the low level interface intended for port 43, and as such, it
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* always prefers ASCII.
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*/
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static final boolean PREFER_UNICODE = false;
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@Inject Clock clock;
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@Inject Reader input;
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@Inject Response response;
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@Inject
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@Config("whoisDisclaimer")
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String disclaimer;
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@Inject WhoisServer() {}
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@Override
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public void run() {
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String responseText;
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DateTime now = clock.nowUtc();
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try {
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responseText =
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new WhoisReader(input, now)
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.readCommand()
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.executeQuery(now)
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.getPlainTextOutput(PREFER_UNICODE, disclaimer);
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} catch (WhoisException e) {
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responseText = e.getPlainTextOutput(PREFER_UNICODE, disclaimer);
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} catch (Throwable t) {
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logger.severe(t, "WHOIS request crashed");
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responseText = "Internal Server Error";
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}
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// Note that we always return 200 (OK) even if an error was hit. This is because returning an
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// non-OK HTTP status code will cause the proxy server to silently close the connection. Since
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// WHOIS has no way to return errors, it's better to convert any such errors into strings and
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// return them directly.
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response.setStatus(SC_OK);
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response.setContentType(CONTENT_TYPE);
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response.setPayload(responseText);
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}
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}
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