@Test
public void testEmptyHostmapUseCase() throws Exception {
URL configUrl = TestUtils.getResourceUrl(this.getClass(), "empty-hostmap.txt");
UrlRewriteEnvironment environment = EasyMock.createNiceMock(UrlRewriteEnvironment.class);
EasyMock.expect(environment.getResource("/WEB-INF/hostmap.txt"))
.andReturn(configUrl)
.anyTimes();
Resolver resolver = EasyMock.createNiceMock(Resolver.class);
EasyMock.expect(resolver.resolve("host"))
.andReturn(Arrays.asList("test-inbound-host"))
.anyTimes();
EasyMock.replay(environment, resolver);
UrlRewriteRulesDescriptor descriptor = UrlRewriteRulesDescriptorFactory.create();
UrlRewriteRuleDescriptor rule = descriptor.addRule("test-rule");
rule.pattern("{*}://{host}:{*}/{**}?{**}");
UrlRewriteActionRewriteDescriptorExt rewrite = rule.addStep("rewrite");
rewrite.template("{*}://{$hostmap(host)}:{*}/{**}?{**}");
UrlRewriteProcessor rewriter = new UrlRewriteProcessor();
rewriter.initialize(environment, descriptor);
Template input =
Parser.parseLiteral(
"test-scheme://test-inbound-host:42/test-path/test-file?test-name=test-value");
Template output = rewriter.rewrite(resolver, input, UrlRewriter.Direction.IN, null);
// System.out.println( output );
assertThat(output, notNullValue());
assertThat(output.getHost().getFirstValue().getPattern(), is("test-inbound-host"));
}
@Override
public void doFilter(
final ServletRequest request, final ServletResponse response, final FilterChain chain)
throws IOException, ServletException {
HttpServletRequest httpRequest = ((HttpServletRequest) request);
StringBuffer sourceUrl = httpRequest.getRequestURL();
String queryString = httpRequest.getQueryString();
if (queryString != null) {
sourceUrl.append("?");
sourceUrl.append(queryString);
}
try {
request.setAttribute(
AbstractGatewayFilter.SOURCE_REQUEST_URL_ATTRIBUTE_NAME,
Parser.parse(sourceUrl.toString()));
} catch (URISyntaxException e) {
throw new ServletException(e);
}
try {
Subject.doAs(
subject,
new PrivilegedExceptionAction<Void>() {
@Override
public Void run() throws Exception {
chain.doFilter(request, response);
return null;
}
});
} catch (PrivilegedActionException e) {
throw new ServletException(e);
}
}
private String rewriteValue(UrlRewriter rewriter, String value, String rule) {
try {
Template input = Parser.parse(value);
Template output = rewriter.rewrite(this, input, UrlRewriter.Direction.IN, rule);
value = output.toString();
} catch (URISyntaxException e) {
LOG.failedToParseValueForUrlRewrite(value);
}
return value;
}
@Test
public void testBasicUseCase() throws Exception {
URL configUrl = TestUtils.getResourceUrl(this.getClass(), "hostmap.txt");
HostMapper hm = EasyMock.createNiceMock(HostMapper.class);
EasyMock.expect(hm.resolveInboundHostName("test-inbound-host"))
.andReturn("test-inbound-rewritten-host")
.anyTimes();
HostMapperService hms = EasyMock.createNiceMock(HostMapperService.class);
GatewayServices gatewayServices = EasyMock.createNiceMock(GatewayServices.class);
EasyMock.expect(gatewayServices.getService(GatewayServices.HOST_MAPPING_SERVICE))
.andReturn(hms)
.anyTimes();
UrlRewriteEnvironment environment = EasyMock.createNiceMock(UrlRewriteEnvironment.class);
EasyMock.expect(environment.getAttribute(GatewayServices.GATEWAY_SERVICES_ATTRIBUTE))
.andReturn(gatewayServices)
.anyTimes();
EasyMock.expect(environment.resolve("cluster.name"))
.andReturn(Arrays.asList("test-cluster-name"))
.anyTimes();
EasyMock.expect(environment.getResource("/WEB-INF/hostmap.txt"))
.andReturn(configUrl)
.anyTimes();
Resolver resolver = EasyMock.createNiceMock(Resolver.class);
EasyMock.expect(resolver.resolve("host"))
.andReturn(Arrays.asList("test-inbound-host"))
.anyTimes();
EasyMock.replay(gatewayServices, hm, hms, environment, resolver);
UrlRewriteRulesDescriptor descriptor = UrlRewriteRulesDescriptorFactory.create();
UrlRewriteRuleDescriptor rule = descriptor.addRule("test-rule");
rule.pattern("{*}://{host}:{*}/{**}?{**}");
UrlRewriteActionRewriteDescriptorExt rewrite = rule.addStep("rewrite");
rewrite.template("{*}://{$hostmap(host)}:{*}/{**}?{**}");
UrlRewriteProcessor rewriter = new UrlRewriteProcessor();
rewriter.initialize(environment, descriptor);
Template input =
Parser.parseLiteral(
"test-scheme://test-inbound-host:42/test-path/test-file?test-name=test-value");
Template output = rewriter.rewrite(resolver, input, UrlRewriter.Direction.IN, null);
// System.out.println( output );
assertThat(output, notNullValue());
assertThat(output.getHost().getFirstValue().getPattern(), is("test-inbound-rewritten-host"));
}
private Template getSourceUrl() {
Template urlTemplate = null;
StringBuffer urlString = super.getRequestURL();
String queryString = super.getQueryString();
if (queryString != null) {
urlString.append('?');
urlString.append(queryString);
}
try {
urlTemplate = Parser.parse(urlString.toString());
} catch (URISyntaxException e) {
LOG.failedToParseValueForUrlRewrite(urlString.toString());
// Shouldn't be possible given that the URL is constructed from parts of an existing URL.
urlTemplate = null;
}
return urlTemplate;
}
@Test
public void testQueryToPathRewriteWithFunction() throws Exception {
URL configUrl = TestUtils.getResourceUrl(this.getClass(), "hdfs-hostmap.txt");
UrlRewriteEnvironment environment = EasyMock.createNiceMock(UrlRewriteEnvironment.class);
EasyMock.expect(environment.getResource("/WEB-INF/hostmap.txt"))
.andReturn(configUrl)
.anyTimes();
Resolver resolver = EasyMock.createNiceMock(Resolver.class);
EasyMock.expect(resolver.resolve("host"))
.andReturn(Arrays.asList("test-internal-host"))
.anyTimes();
EasyMock.replay(environment, resolver);
UrlRewriteRulesDescriptor descriptor = UrlRewriteRulesDescriptorFactory.create();
UrlRewriteRuleDescriptor rule = descriptor.addRule("test-rule");
rule.pattern("{*}://{host}:{*}/{**}?{qp1}&{qp2}&{**}");
UrlRewriteActionRewriteDescriptorExt rewrite = rule.addStep("rewrite");
rewrite.template("{*}://test-static-host:{*}/{qp1}/{qp2}/{**}?server={$hostmap(host)}&{**}");
UrlRewriteProcessor rewriter = new UrlRewriteProcessor();
rewriter.initialize(environment, descriptor);
Template input =
Parser.parseLiteral(
"test-scheme://test-external-host:42/test-path/test-file?qp1=qp1-val&qp2=qp2-val&test-name-1=test-value-1&test-name-2=test-value-2");
Template output = rewriter.rewrite(resolver, input, UrlRewriter.Direction.OUT, "test-rule");
// System.out.println( output );
assertThat(output, notNullValue());
assertThat(output.getHost().getFirstValue().getPattern(), is("test-static-host"));
assertThat(
output.getQuery().get("server").getFirstValue().getPattern(), is("test-external-host"));
assertThat(output.getQuery().get("server").getValues().size(), is(1));
assertThat(
output.getQuery().get("test-name-1").getFirstValue().getPattern(), is("test-value-1"));
assertThat(output.getQuery().get("test-name-1").getValues().size(), is(1));
assertThat(
output.getQuery().get("test-name-2").getFirstValue().getPattern(), is("test-value-2"));
assertThat(output.getQuery().get("test-name-2").getValues().size(), is(1));
assertThat(output.getQuery().size(), is(3));
}
public void doGet(URI url, HttpServletRequest request, HttpServletResponse response)
throws IOException, URISyntaxException {
String sourcePathInfo = request.getPathInfo();
String sourcePattern = getConfig().getInitParameter("pattern");
String targetPattern = getConfig().getInitParameter("target");
// TODO: Some of the compilation should be done at servlet init for performance reasons.
Template sourceTemplate = Parser.parseTemplate(sourcePattern);
Template targetTemplate = Parser.parseTemplate(targetPattern);
Resolver resolver = new DispatchParamResolver(getConfig(), request);
URI sourceUri = new URI(sourcePathInfo);
URI targetUri = Rewriter.rewrite(sourceUri, sourceTemplate, targetTemplate, resolver, null);
// //TODO: This should be more at filter init.
// Pattern sourceRegex = UrlRewriter.compileUrlRegex( sourcePattern );
// Matcher matcher = sourceRegex.matcher( sourcePathInfo );
// String targetUrl = MessageFormat.format( targetPattern, Regex.toGroupArray( matcher ) );
// System.out.println( "Source URI: " + expect.getRequestURI() );
// System.out.println( "Source URL: " + expect.getRequestURL() );
// System.out.println( "Source Query: " + expect.getQueryString() );
// System.out.println( "Source pathInfo: " + sourcePathInfo );
// System.out.println( "Source pattern: " + sourcePattern );
// System.out.println( "Target pattern: " + targetPattern );
// System.out.println( "Resolved target: " + targetUrl );
StringBuilder paramStr = new StringBuilder();
Enumeration paramNames = request.getParameterNames();
if (paramNames.hasMoreElements()) {
paramStr.append("?");
}
while (paramNames.hasMoreElements()) {
String paramName = (String) paramNames.nextElement();
String paramValue = request.getParameter(paramName);
paramStr.append(paramName);
paramStr.append("=");
paramStr.append(URLEncoder.encode(paramValue, "UTF-8"));
if (paramNames.hasMoreElements()) {
paramStr.append("&");
}
}
String urlStr = targetUri.toString() + paramStr.toString();
try {
URL clientUrl = new URL(urlStr);
// System.out.println( "Resolved query: " + clientUrl );
AuthenticatedURL.Token token = new AuthenticatedURL.Token();
KerberosAuthenticator authenticator = new KerberosAuthenticator();
auditor.audit(Action.DISPATCH, urlStr, ResourceType.URI, ActionOutcome.UNAVAILABLE);
HttpURLConnection conn = new AuthenticatedURL(authenticator).openConnection(clientUrl, token);
// System.out.println( "STATUS=" + conn.getResponseCode() );
InputStream input = conn.getInputStream();
if (input != null) {
OutputStream output = response.getOutputStream();
try {
IOUtils.copy(input, output);
} finally {
output.flush();
input.close();
}
}
auditor.audit(Action.DISPATCH, urlStr, ResourceType.URI, ActionOutcome.SUCCESS);
} catch (AuthenticationException e) {
response.sendError(HttpServletResponse.SC_UNAUTHORIZED);
LOG.failedToEstablishConnectionToUrl(urlStr, e);
auditor.audit(
Action.DISPATCH,
urlStr,
ResourceType.URI,
ActionOutcome.FAILURE,
RES.responseStatus(HttpServletResponse.SC_UNAUTHORIZED));
} catch (FileNotFoundException e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
LOG.failedToEstablishConnectionToUrl(urlStr, e);
auditor.audit(
Action.DISPATCH,
urlStr,
ResourceType.URI,
ActionOutcome.FAILURE,
RES.responseStatus(HttpServletResponse.SC_NOT_FOUND));
}
}
