google-nomulus/java/google/registry/ui/server/api/CheckApiServlet.java
Michael Muller c458c05801 Rename Java packages to use the .google TLD
The dark lord Gosling designed the Java package naming system so that
ownership flows from the DNS system. Since we own the domain name
registry.google, it seems only appropriate that we should use
google.registry as our package name.
2016-05-13 20:04:42 -04:00

139 lines
5.8 KiB
Java

// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package google.registry.ui.server.api;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.google.common.base.Strings.nullToEmpty;
import static com.google.common.net.HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN;
import static google.registry.model.eppcommon.ProtocolDefinition.ServiceExtension.FEE_0_6;
import static google.registry.ui.server.SoyTemplateUtils.createTofuSupplier;
import static google.registry.util.DomainNameUtils.canonicalizeDomainName;
import static google.registry.util.DomainNameUtils.getTldFromDomainName;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.json.simple.JSONValue.toJSONString;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.net.MediaType;
import com.google.template.soy.tofu.SoyTofu;
import google.registry.config.RegistryEnvironment;
import google.registry.flows.EppException;
import google.registry.flows.EppXmlTransformer;
import google.registry.flows.FlowRunner;
import google.registry.flows.FlowRunner.CommitMode;
import google.registry.flows.FlowRunner.UserPrivileges;
import google.registry.flows.SessionMetadata.SessionSource;
import google.registry.flows.StatelessRequestSessionMetadata;
import google.registry.flows.domain.DomainCheckFlow;
import google.registry.model.domain.fee.FeeCheckResponseExtension;
import google.registry.model.domain.fee.FeeCheckResponseExtension.FeeCheck;
import google.registry.model.eppcommon.Trid;
import google.registry.model.eppinput.EppInput;
import google.registry.model.eppoutput.CheckData.DomainCheck;
import google.registry.model.eppoutput.CheckData.DomainCheckData;
import google.registry.model.eppoutput.Response;
import google.registry.ui.soy.api.DomainCheckFeeEppSoyInfo;
import java.io.IOException;
import java.util.Map;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* A servlet that returns availability and premium checks as json.
* <p>
* This servlet returns plain JSON without a safety prefix, so it's vital that the output not be
* user controlled, lest it open an XSS vector. Do not modify this to return the domain name in the
* response.
*/
public class CheckApiServlet extends HttpServlet {
private static final Supplier<SoyTofu> TOFU_SUPPLIER =
createTofuSupplier(DomainCheckFeeEppSoyInfo.getInstance());
@Override
public void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
Map<String, ?> response = doCheck(req.getParameter("domain"));
rsp.setHeader("Content-Disposition", "attachment");
rsp.setHeader("X-Content-Type-Options", "nosniff");
rsp.setHeader(ACCESS_CONTROL_ALLOW_ORIGIN, "*");
rsp.setContentType(MediaType.JSON_UTF_8.toString());
rsp.getWriter().write(toJSONString(response));
}
private StatelessRequestSessionMetadata sessionMetadata = new StatelessRequestSessionMetadata(
RegistryEnvironment.get().config().getCheckApiServletRegistrarClientId(),
false,
false,
ImmutableSet.of(FEE_0_6.getUri()),
SessionSource.HTTP);
// TODO(rgr): add whitebox instrumentation for this?
private Map<String, ?> doCheck(String domainString) {
try {
domainString = canonicalizeDomainName(nullToEmpty(domainString));
// Validate the TLD.
getTldFromDomainName(domainString);
} catch (IllegalStateException | IllegalArgumentException e) {
return fail("Must supply a valid second level domain name");
}
try {
byte[] inputXmlBytes = TOFU_SUPPLIER.get()
.newRenderer(DomainCheckFeeEppSoyInfo.DOMAINCHECKFEE)
.setData(ImmutableMap.of("domainName", domainString))
.render()
.getBytes(UTF_8);
Response response = new FlowRunner(
DomainCheckFlow.class,
EppXmlTransformer.<EppInput>unmarshal(inputXmlBytes),
Trid.create(CheckApiServlet.class.getSimpleName()),
sessionMetadata,
inputXmlBytes,
null)
.run(CommitMode.LIVE, UserPrivileges.NORMAL)
.getResponse();
DomainCheckData checkData = (DomainCheckData) response.getResponseData().get(0);
DomainCheck check = (DomainCheck) checkData.getChecks().get(0);
boolean available = check.getName().getAvail();
ImmutableMap.Builder<String, Object> builder = new ImmutableMap.Builder<String, Object>()
.put("status", "success")
.put("available", available);
if (available) {
FeeCheckResponseExtension feeCheckResponse =
(FeeCheckResponseExtension) response.getExtensions().get(0);
FeeCheck feeCheck = feeCheckResponse.getChecks().get(0);
builder.put("tier", firstNonNull(feeCheck.getFeeClass(), "standard"));
} else {
builder.put("reason", check.getReason());
}
return builder.build();
} catch (EppException e) {
return fail(e.getMessage());
} catch (Exception e) {
e.printStackTrace();
return fail("Invalid request");
}
}
private Map<String, String> fail(String reason) {
return ImmutableMap.of(
"status", "error",
"reason", reason);
}
}