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TestHTTPServer.java
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TestHTTPServer.java
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package io.prometheus.client.exporter;
import com.sun.net.httpserver.Authenticator;
import com.sun.net.httpserver.BasicAuthenticator;
import com.sun.net.httpserver.HttpServer;
import io.prometheus.client.Gauge;
import io.prometheus.client.CollectorRegistry;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.InetSocketAddress;
import java.net.URL;
import java.net.URLConnection;
import java.util.Scanner;
import java.util.zip.GZIPInputStream;
import io.prometheus.client.SampleNameFilter;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import javax.xml.bind.DatatypeConverter;
import static org.assertj.core.api.Java6Assertions.assertThat;
public class TestHTTPServer {
CollectorRegistry registry;
@Before
public void init() throws IOException {
registry = new CollectorRegistry();
Gauge.build("a", "a help").register(registry);
Gauge.build("b", "a help").register(registry);
Gauge.build("c", "a help").register(registry);
}
String request(HTTPServer s, String context, String suffix) throws IOException {
String url = "http://localhost:" + s.server.getAddress().getPort() + context + suffix;
URLConnection connection = new URL(url).openConnection();
connection.setDoOutput(true);
connection.connect();
Scanner scanner = new Scanner(connection.getInputStream(), "UTF-8").useDelimiter("\\A");
return scanner.hasNext() ? scanner.next() : "";
}
String request(HTTPServer s, String suffix) throws IOException {
return request(s, "/metrics", suffix);
}
String requestWithCompression(HTTPServer s, String suffix) throws IOException {
return requestWithCompression(s, "/metrics", suffix);
}
String requestWithCompression(HTTPServer s, String context, String suffix) throws IOException {
String url = "http://localhost:" + s.server.getAddress().getPort() + context + suffix;
URLConnection connection = new URL(url).openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestProperty("Accept-Encoding", "gzip, deflate");
connection.connect();
GZIPInputStream gzs = new GZIPInputStream(connection.getInputStream());
Scanner scanner = new Scanner(gzs).useDelimiter("\\A");
return scanner.hasNext() ? scanner.next() : "";
}
String requestWithAccept(HTTPServer s, String accept) throws IOException {
String url = "http://localhost:" + s.server.getAddress().getPort();
URLConnection connection = new URL(url).openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestProperty("Accept", accept);
Scanner scanner = new Scanner(connection.getInputStream(), "UTF-8").useDelimiter("\\A");
return scanner.hasNext() ? scanner.next() : "";
}
String requestWithCredentials(HTTPServer httpServer, String context, String suffix, String user, String password) throws IOException {
String url = "http://localhost:" + httpServer.server.getAddress().getPort() + context + suffix;
URLConnection connection = new URL(url).openConnection();
connection.setDoOutput(true);
if (user != null && password != null) {
connection.setRequestProperty("Authorization", encodeCredentials(user, password));
}
connection.connect();
Scanner s = new Scanner(connection.getInputStream(), "UTF-8").useDelimiter("\\A");
return s.hasNext() ? s.next() : "";
}
String encodeCredentials(String user, String password) {
// Per RFC4648 table 2. We support Java 6, and java.util.Base64 was only added in Java 8,
try {
byte[] credentialsBytes = (user + ":" + password).getBytes("UTF-8");
String encoded = DatatypeConverter.printBase64Binary(credentialsBytes);
encoded = String.format("Basic %s", encoded);
return encoded;
} catch (UnsupportedEncodingException e) {
throw new IllegalArgumentException(e);
}
}
Authenticator createAuthenticator(String realm, final String validUsername, final String validPassword) {
return new BasicAuthenticator(realm) {
@Override
public boolean checkCredentials(String username, String password) {
return validUsername.equals(username) && validPassword.equals(password);
}
};
}
@Test(expected = IllegalArgumentException.class)
public void testRefuseUsingUnbound() throws IOException {
CollectorRegistry registry = new CollectorRegistry();
HTTPServer s = new HTTPServer(HttpServer.create(), registry, true);
s.stop();
}
@Test
public void testSimpleRequest() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = request(s, "");
assertThat(response).contains("a 0.0");
assertThat(response).contains("b 0.0");
assertThat(response).contains("c 0.0");
} finally {
s.close();
}
}
@Test
public void testBadParams() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = request(s, "?x");
assertThat(response).contains("a 0.0");
assertThat(response).contains("b 0.0");
assertThat(response).contains("c 0.0");
} finally {
s.close();
}
}
@Test
public void testSingleName() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = request(s, "?name[]=a");
assertThat(response).contains("a 0.0");
assertThat(response).doesNotContain("b 0.0");
assertThat(response).doesNotContain("c 0.0");
} finally {
s.close();
}
}
@Test
public void testMultiName() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = request(s, "?name[]=a&name[]=b");
assertThat(response).contains("a 0.0");
assertThat(response).contains("b 0.0");
assertThat(response).doesNotContain("c 0.0");
} finally {
s.close();
}
}
@Test
public void testSampleNameFilter() throws IOException {
HTTPServer s = new HTTPServer.Builder()
.withRegistry(registry)
.withSampleNameFilter(new SampleNameFilter.Builder()
.nameMustNotStartWith("a")
.build())
.build();
try {
String response = request(s, "?name[]=a&name[]=b");
assertThat(response).doesNotContain("a 0.0");
assertThat(response).contains("b 0.0");
assertThat(response).doesNotContain("c 0.0");
} finally {
s.close();
}
}
@Test
public void testDecoding() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = request(s, "?n%61me[]=%61");
assertThat(response).contains("a 0.0");
assertThat(response).doesNotContain("b 0.0");
assertThat(response).doesNotContain("c 0.0");
} finally {
s.close();
}
}
@Test
public void testGzipCompression() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = requestWithCompression(s, "");
assertThat(response).contains("a 0.0");
assertThat(response).contains("b 0.0");
assertThat(response).contains("c 0.0");
} finally {
s.close();
}
}
@Test
public void testOpenMetrics() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = requestWithAccept(s, "application/openmetrics-text; version=0.0.1,text/plain;version=0.0.4;q=0.5,*/*;q=0.1");
assertThat(response).contains("# EOF");
} finally {
s.close();
}
}
@Test
public void testHealth() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = request(s, "/-/healthy", "");
assertThat(response).contains("Exporter is Healthy");
} finally {
s.close();
}
}
@Test
public void testHealthGzipCompression() throws IOException {
HTTPServer s = new HTTPServer(new InetSocketAddress(0), registry);
try {
String response = requestWithCompression(s, "/-/healthy", "");
assertThat(response).contains("Exporter is Healthy");
} finally {
s.close();
}
}
@Test
public void testBasicAuthSuccess() throws IOException {
HTTPServer s = new HTTPServer.Builder()
.withRegistry(registry)
.withAuthenticator(createAuthenticator("/", "user", "secret"))
.build();
try {
String response = requestWithCredentials(s, "/metrics","?name[]=a&name[]=b", "user", "secret");
assertThat(response).contains("a 0.0");
} finally {
s.close();
}
}
@Test
public void testBasicAuthCredentialsMissing() throws IOException {
HTTPServer s = new HTTPServer.Builder()
.withRegistry(registry)
.withAuthenticator(createAuthenticator("/", "user", "secret"))
.build();
try {
request(s, "/metrics", "?name[]=a&name[]=b");
Assert.fail("expected IOException with HTTP 401");
} catch (IOException e) {
Assert.assertTrue(e.getMessage().contains("401"));
} finally {
s.close();
}
}
@Test
public void testBasicAuthWrongCredentials() throws IOException {
HTTPServer s = new HTTPServer.Builder()
.withRegistry(registry)
.withAuthenticator(createAuthenticator("/", "user", "wrong"))
.build();
try {
request(s, "/metrics", "?name[]=a&name[]=b");
Assert.fail("expected IOException with HTTP 401");
} catch (IOException e) {
Assert.assertTrue(e.getMessage().contains("401"));
} finally {
s.close();
}
}
}