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Added batch support to the local DNS helper. (#925)
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Added batch support to the local DNS helper
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@mderka @mziccard
mderka authored and mziccard committed Apr 19, 2016
1 parent 618b677 commit b75652e
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Showing 3 changed files with 1,184 additions and 6 deletions.
5 changes: 5 additions & 0 deletions gcloud-java-dns/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,11 @@
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>gcloud-java-core</artifactId>
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110 changes: 105 additions & 5 deletions gcloud-java-dns/src/main/java/com/google/cloud/dns/testing/LocalDnsHelper.java
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
import static java.net.HttpURLConnection.HTTP_NO_CONTENT;
import static java.net.HttpURLConnection.HTTP_OK;

import com.google.api.client.http.HttpMediaType;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.api.services.dns.model.Change;
Expand All @@ -43,13 +44,16 @@
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

import org.apache.commons.fileupload.MultipartStream;
import org.joda.time.format.ISODateTimeFormat;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
Expand All @@ -62,6 +66,7 @@
import java.util.NavigableMap;
import java.util.NavigableSet;
import java.util.Random;
import java.util.Scanner;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
Expand Down Expand Up @@ -112,6 +117,9 @@ public class LocalDnsHelper {
private static final ScheduledExecutorService EXECUTORS =
Executors.newScheduledThreadPool(2, Executors.defaultThreadFactory());
private static final String PROJECT_ID = "dummyprojectid";
private static final String RESPONSE_BOUNDARY = "____THIS_IS_HELPERS_BOUNDARY____";
private static final String RESPONSE_SEPARATOR = "--" + RESPONSE_BOUNDARY + "\r\n";
private static final String RESPONSE_END = "--" + RESPONSE_BOUNDARY + "--\r\n\r\n";

static {
try {
Expand All @@ -138,7 +146,8 @@ private enum CallRegex {
ZONE_GET("GET", CONTEXT + "/[^/]+/managedZones/[^/]+"),
ZONE_LIST("GET", CONTEXT + "/[^/]+/managedZones"),
PROJECT_GET("GET", CONTEXT + "/[^/]+"),
RECORD_LIST("GET", CONTEXT + "/[^/]+/managedZones/[^/]+/rrsets");
RECORD_LIST("GET", CONTEXT + "/[^/]+/managedZones/[^/]+/rrsets"),
BATCH("POST", "/batch");

private final String method;
private final String pathRegex;
Expand Down Expand Up @@ -273,13 +282,18 @@ private String toJson(String message) throws IOException {
private class RequestHandler implements HttpHandler {

private Response pickHandler(HttpExchange exchange, CallRegex regex) {
URI relative = BASE_CONTEXT.relativize(exchange.getRequestURI());
URI relative = null;
try {
relative = BASE_CONTEXT.relativize(new URI(exchange.getRequestURI().getRawPath()));
} catch (URISyntaxException e) {
return Error.INTERNAL_ERROR.response("Parsing URI failed.");
}
String path = relative.getPath();
String[] tokens = path.split("/");
String projectId = tokens.length > 0 ? tokens[0] : null;
String zoneName = tokens.length > 2 ? tokens[2] : null;
String changeId = tokens.length > 4 ? tokens[4] : null;
String query = relative.getQuery();
String query = exchange.getRequestURI().getQuery();
switch (regex) {
case CHANGE_GET:
return getChange(projectId, zoneName, changeId, query);
Expand Down Expand Up @@ -307,6 +321,12 @@ private Response pickHandler(HttpExchange exchange, CallRegex regex) {
} catch (IOException ex) {
return Error.BAD_REQUEST.response(ex.getMessage());
}
case BATCH:
try {
return handleBatch(exchange);
} catch (IOException ex) {
return Error.BAD_REQUEST.response(ex.getMessage());
}
default:
return Error.INTERNAL_ERROR.response("Operation without a handler.");
}
Expand All @@ -319,7 +339,11 @@ public void handle(HttpExchange exchange) throws IOException {
for (CallRegex regex : CallRegex.values()) {
if (requestMethod.equals(regex.method) && rawPath.matches(regex.pathRegex)) {
Response response = pickHandler(exchange, regex);
writeResponse(exchange, response);
if (response != null) {
/* null response is returned by batch request, because it handles writing
the response on its own */
writeResponse(exchange, response);
}
return;
}
}
Expand All @@ -328,6 +352,67 @@ public void handle(HttpExchange exchange) throws IOException {
requestMethod, exchange.getRequestURI())));
}

private Response handleBatch(final HttpExchange exchange) throws IOException {
String contentType = exchange.getRequestHeaders().getFirst("Content-type");
if (contentType != null) {
int port = server.getAddress().getPort();
HttpMediaType httpMediaType = new HttpMediaType(contentType);
String boundary = httpMediaType.getParameter("boundary");
MultipartStream multipartStream =
new MultipartStream(exchange.getRequestBody(), boundary.getBytes(), 1024, null);
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] bytes = new byte[1024];
multipartStream.skipPreamble();
while (multipartStream.readBoundary()) {
Socket socket = new Socket("localhost", port);
OutputStream socketOutput = socket.getOutputStream();
ByteArrayOutputStream section = new ByteArrayOutputStream();
multipartStream.readBodyData(section);
String line;
String contentId = null;
Scanner scanner = new Scanner(new String(section.toByteArray()));
while (scanner.hasNextLine()) {
line = scanner.nextLine();
if(line.isEmpty()) {
break;
} else if (line.toLowerCase().startsWith("content-id")) {
contentId = line.split(":")[1].trim();
}
}
String requestLine = scanner.nextLine();
socketOutput.write((requestLine + " \r\n").getBytes());
socketOutput.write("Connection: close \r\n".getBytes());
while(scanner.hasNextLine()) {
line = scanner.nextLine();
socketOutput.write(line.getBytes());
if (!line.isEmpty()) {
socketOutput.write(" \r\n".getBytes());
} else {
socketOutput.write("\r\n".getBytes());
}
}
socketOutput.flush();
InputStream in = socket.getInputStream();
int length;
out.write(RESPONSE_SEPARATOR.getBytes());
out.write("Content-Type: application/http \r\n".getBytes());
out.write(("Content-ID: " + contentId + " \r\n\r\n").getBytes());
try {
while ((length = in.read(bytes)) != -1) {
out.write(bytes, 0, length);
}
} catch (IOException ex) {
// this handles connection reset error
}
}
out.write(RESPONSE_END.getBytes());
writeBatchResponse(exchange, out);
} else {
return Error.BAD_REQUEST.response("Content-type header was not provided for batch.");
}
return null;
}

/**
* @throws IOException if the request cannot be parsed.
*/
Expand Down Expand Up @@ -368,7 +453,8 @@ private LocalDnsHelper(long delay) {
try {
server = HttpServer.create(new InetSocketAddress(0), 0);
port = server.getAddress().getPort();
server.createContext(CONTEXT, new RequestHandler());
server.setExecutor(Executors.newCachedThreadPool());
server.createContext("/", new RequestHandler());
} catch (IOException e) {
throw new RuntimeException("Could not bind the mock DNS server.", e);
}
Expand Down Expand Up @@ -430,6 +516,20 @@ private static void writeResponse(HttpExchange exchange, Response response) {
}
}

private static void writeBatchResponse(HttpExchange exchange, ByteArrayOutputStream output) {
exchange.getResponseHeaders().set(
"Content-type", "multipart/mixed; boundary=" + RESPONSE_BOUNDARY);
try {
exchange.getResponseHeaders().add("Connection", "close");
exchange.sendResponseHeaders(200, output.toByteArray().length);
OutputStream responseBody = exchange.getResponseBody();
output.writeTo(responseBody);
responseBody.close();
} catch (IOException e) {
log.log(Level.WARNING, "IOException encountered when sending response.", e);
}
}

private static String decodeContent(Headers headers, InputStream inputStream) throws IOException {
List<String> contentEncoding = headers.get("Content-encoding");
InputStream input = inputStream;
Expand Down
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