ninja.S3Controller Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of s3ninja Show documentation
Show all versions of s3ninja Show documentation
S3 ninja emulates the S3 API for development and testing purposes.
/*
* Made with all the love in the world
* by scireum in Remshalden, Germany
*
* Copyright by scireum GmbH
* http://www.scireum.de - [email protected]
*/
package ninja;
import com.google.common.base.Charsets;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hashing;
import com.google.common.io.BaseEncoding;
import com.google.common.io.ByteStreams;
import com.google.common.io.Files;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpResponseStatus;
import sirius.kernel.async.CallContext;
import sirius.kernel.commons.Strings;
import sirius.kernel.commons.Value;
import sirius.kernel.di.std.Part;
import sirius.kernel.di.std.Register;
import sirius.kernel.health.Exceptions;
import sirius.kernel.health.HandledException;
import sirius.kernel.xml.XMLStructuredOutput;
import sirius.web.controller.Controller;
import sirius.web.controller.Routed;
import sirius.web.http.Response;
import sirius.web.http.WebContext;
import sirius.web.security.UserContext;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.ZoneOffset;
import java.time.chrono.IsoChronology;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.locks.ReentrantLock;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
/**
* Handles calls to the S3 API.
*/
@Register
public class S3Controller implements Controller {
@Override
public void onError(WebContext ctx, HandledException error) {
signalObjectError(ctx, HttpResponseStatus.BAD_REQUEST, error.getMessage());
}
@Part
private Storage storage;
@Part
private APILog log;
private Map locks = Maps.newConcurrentMap();
/*
* Computes the expected hash for the given request.
*/
private String computeHash(WebContext ctx, String pathPrefix) {
try {
Matcher aws4Header = AWS_AUTH4_PATTERN.matcher(ctx.getHeaderValue("Authorization").asString(""));
if (aws4Header.matches()) {
return computeAWS4Hash(ctx, aws4Header);
} else {
return computeAWSLegacyHash(ctx, pathPrefix);
}
} catch (Throwable e) {
throw Exceptions.handle(UserContext.LOG, e);
}
}
/*
* Computes the "classic" authentication hash.
*/
private String computeAWSLegacyHash(WebContext ctx, String pathPrefix) throws Exception {
StringBuilder stringToSign = new StringBuilder(ctx.getRequest().getMethod().name());
stringToSign.append("\n");
stringToSign.append(ctx.getHeaderValue("Content-MD5").asString(""));
stringToSign.append("\n");
stringToSign.append(ctx.getHeaderValue("Content-Type").asString(""));
stringToSign.append("\n");
stringToSign.append(ctx.get("Expires")
.asString(ctx.getHeaderValue("x-amz-date")
.asString(ctx.getHeaderValue("Date").asString(""))));
stringToSign.append("\n");
List headers = Lists.newArrayList();
for (String name : ctx.getRequest().headers().names()) {
if (name.toLowerCase().startsWith("x-amz-") && !"x-amz-date".equals(name.toLowerCase())) {
StringBuilder headerBuilder = new StringBuilder(name.toLowerCase().trim());
headerBuilder.append(":");
headerBuilder.append(Strings.join(ctx.getRequest().headers().getAll(name), ",").trim());
headers.add(headerBuilder.toString());
}
}
Collections.sort(headers);
for (String header : headers) {
stringToSign.append(header);
stringToSign.append("\n");
}
stringToSign.append(pathPrefix).append(ctx.getRequestedURI().substring(3));
SecretKeySpec keySpec = new SecretKeySpec(storage.getAwsSecretKey().getBytes(), "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(keySpec);
byte[] result = mac.doFinal(stringToSign.toString().getBytes(Charsets.UTF_8.name()));
return BaseEncoding.base64().encode(result);
}
/*
* Computes the AWS Version 4 signing hash
*/
private String computeAWS4Hash(WebContext ctx, Matcher aws4Header) throws Exception {
StringBuilder canonicalRequest = new StringBuilder(ctx.getRequest().getMethod().name());
canonicalRequest.append("\n");
canonicalRequest.append(ctx.getRequestedURI());
canonicalRequest.append("\n");
canonicalRequest.append(ctx.getQueryString());
canonicalRequest.append("\n");
for (String name : aws4Header.group(4).split(";")) {
canonicalRequest.append(name.trim());
canonicalRequest.append(":");
canonicalRequest.append(Strings.join(ctx.getRequest().headers().getAll(name), ",").trim());
canonicalRequest.append("\n");
}
canonicalRequest.append("\n");
canonicalRequest.append(aws4Header.group(4));
canonicalRequest.append("\n");
canonicalRequest.append(ctx.getHeader("x-amz-content-sha256"));
StringBuilder stringToSign = new StringBuilder("AWS4-HMAC-SHA256\n");
stringToSign.append(ctx.getHeader("x-amz-date"));
stringToSign.append("\n");
stringToSign.append(ctx.getHeader("x-amz-date").substring(0, 8));
stringToSign.append("/");
stringToSign.append(aws4Header.group(3));
stringToSign.append("/s3/aws4_request\n");
stringToSign.append(Hashing.sha256().hashString(canonicalRequest, Charsets.UTF_8).toString());
byte[] dateKey = hmacSHA256(("AWS4" + storage.getAwsSecretKey()).getBytes(Charsets.UTF_8), aws4Header.group(2));
byte[] dateRegionKey = hmacSHA256(dateKey, aws4Header.group(3));
byte[] dateRegionServiceKey = hmacSHA256(dateRegionKey, "s3");
byte[] signingKey = hmacSHA256(dateRegionServiceKey, "aws4_request");
return BaseEncoding.base16().lowerCase().encode(hmacSHA256(signingKey, stringToSign.toString()));
}
private byte[] hmacSHA256(byte[] key, String value) throws Exception {
SecretKeySpec keySpec = new SecretKeySpec(key, "HmacSHA256");
Mac mac = Mac.getInstance("HmacSHA256");
mac.init(keySpec);
return mac.doFinal(value.getBytes(Charsets.UTF_8));
}
private static final Pattern AWS_AUTH_PATTERN = Pattern.compile("AWS ([^:]+):(.*)");
private static final Pattern AWS_AUTH4_PATTERN = Pattern.compile(
"AWS4-HMAC-SHA256 Credential=([^/]+)/([^/]+)/([^/]+)/s3/aws4_request, SignedHeaders=([^,]+), Signature=(.+)");
/*
* Extracts the given hash from the given request. Returns null if no hash was given.
*/
private String getAuthHash(WebContext ctx) {
Value auth = ctx.getHeaderValue(HttpHeaders.Names.AUTHORIZATION);
if (!auth.isFilled()) {
return ctx.get("Signature").getString();
}
Matcher m = AWS_AUTH_PATTERN.matcher(auth.getString());
if (m.matches()) {
return m.group(2);
}
m = AWS_AUTH4_PATTERN.matcher(auth.getString());
if (m.matches()) {
return m.group(5);
}
return null;
}
/*
* Writes an API error to the log
*/
private void signalObjectError(WebContext ctx, HttpResponseStatus status, String message) {
ctx.respondWith().error(status, message);
log.log("OBJECT " + ctx.getRequest().getMethod().name(),
message + " - " + ctx.getRequestedURI(),
APILog.Result.ERROR,
CallContext.getCurrent().getWatch());
}
/*
* Writes an API success entry to the log
*/
private void signalObjectSuccess(WebContext ctx) {
log.log("OBJECT " + ctx.getRequest().getMethod().name(),
ctx.getRequestedURI(),
APILog.Result.OK,
CallContext.getCurrent().getWatch());
}
/**
* Dispatching method handling all object specific calls.
*
* @param ctx the context describing the current request
* @param bucketName name of the bucket which contains the object (must exist)
* @param idList name of the object ob interest
* @throws Exception in case of IO errors and there like
*/
@Routed("/s3/:1/**")
public void object(WebContext ctx, String bucketName, List idList) throws Exception {
Bucket bucket = storage.getBucket(bucketName);
if (!bucket.exists()) {
if (storage.isAutocreateBuckets()) {
bucket.create();
} else {
signalObjectError(ctx, HttpResponseStatus.NOT_FOUND, "Bucket does not exist");
return;
}
}
String id = idList.stream().collect(Collectors.joining("/")).replace('/', '_');
if (Strings.isEmpty(id)) {
objectWithEmptyIdList(ctx);
return;
}
if (!objectCheckAuth(ctx, bucket)) {
return;
}
if (ctx.getRequest().getMethod() == HttpMethod.GET) {
getObject(ctx, bucket, id, true);
} else if (ctx.getRequest().getMethod() == HttpMethod.PUT) {
Value copy = ctx.getHeaderValue("x-amz-copy-source");
if (copy.isFilled()) {
copyObject(ctx, bucket, id, copy.asString());
} else {
putObject(ctx, bucket, id);
}
} else if (ctx.getRequest().getMethod() == HttpMethod.DELETE) {
deleteObject(ctx, bucket, id);
} else if (ctx.getRequest().getMethod() == HttpMethod.HEAD) {
getObject(ctx, bucket, id, false);
} else {
throw new IllegalArgumentException(ctx.getRequest().getMethod().name());
}
}
private boolean objectCheckAuth(WebContext ctx, Bucket bucket) {
String hash = getAuthHash(ctx);
if (hash != null) {
String expectedHash = computeHash(ctx, "");
String alternativeHash = computeHash(ctx, "/s3");
if (!expectedHash.equals(hash) && !alternativeHash.equals(hash)) {
ctx.respondWith()
.error(HttpResponseStatus.UNAUTHORIZED,
Strings.apply("Invalid Hash (Expected: %s, Found: %s)", expectedHash, hash));
log.log("OBJECT " + ctx.getRequest().getMethod().name(),
ctx.getRequestedURI(),
APILog.Result.REJECTED,
CallContext.getCurrent().getWatch());
return false;
}
}
if (bucket.isPrivate() && !ctx.get("noAuth").isFilled() && hash == null) {
ctx.respondWith().error(HttpResponseStatus.UNAUTHORIZED, "Authentication required");
log.log("OBJECT " + ctx.getRequest().getMethod().name(),
ctx.getRequestedURI(),
APILog.Result.REJECTED,
CallContext.getCurrent().getWatch());
return false;
}
return true;
}
private void objectWithEmptyIdList(WebContext ctx) {
// if it's a request to the bucket, it's usually a bucket create command.
// As we allow bucket creation, thus send a positive response
if (ctx.getRequest().getMethod() == HttpMethod.HEAD || ctx.getRequest().getMethod() == HttpMethod.GET) {
signalObjectSuccess(ctx);
ctx.respondWith().status(HttpResponseStatus.OK);
}
signalObjectError(ctx, HttpResponseStatus.NOT_FOUND, "Please provide an object id");
}
/**
* Handles DELETE /bucket/id
*
* @param ctx the context describing the current request
* @param bucket the bucket containing the object to delete
* @param id name of the object to delete
*/
private void deleteObject(WebContext ctx, Bucket bucket, String id) {
StoredObject object = bucket.getObject(id);
object.delete();
ctx.respondWith().status(HttpResponseStatus.OK);
signalObjectSuccess(ctx);
}
/**
* Handles PUT /bucket/id
*
* @param ctx the context describing the current request
* @param bucket the bucket containing the object to upload
* @param id name of the object to upload
*/
private void putObject(WebContext ctx, Bucket bucket, String id) throws Exception {
StoredObject object = bucket.getObject(id);
InputStream inputStream = ctx.getContent();
if (inputStream == null) {
signalObjectError(ctx, HttpResponseStatus.BAD_REQUEST, "No content posted");
return;
}
try {
try (FileOutputStream out = new FileOutputStream(object.getFile())) {
ByteStreams.copy(inputStream, out);
}
} finally {
inputStream.close();
}
Map properties = Maps.newTreeMap();
for (String name : ctx.getRequest().headers().names()) {
String nameLower = name.toLowerCase();
if (nameLower.startsWith("x-amz-meta-") || "content-md5".equals(nameLower) || "content-type".equals(
nameLower) || "x-amz-acl".equals(nameLower)) {
properties.put(name, ctx.getHeader(name));
}
}
HashCode hash = Files.hash(object.getFile(), Hashing.md5());
String md5 = BaseEncoding.base64().encode(hash.asBytes());
if (properties.containsKey("Content-MD5")) {
if (!md5.equals(properties.get("Content-MD5"))) {
object.delete();
signalObjectError(ctx,
HttpResponseStatus.BAD_REQUEST,
Strings.apply("Invalid MD5 checksum (Input: %s, Expected: %s)",
properties.get("Content-MD5"),
md5));
return;
}
}
object.storeProperties(properties);
ctx.respondWith().addHeader(HttpHeaders.Names.ETAG, etag(hash)).status(HttpResponseStatus.OK);
signalObjectSuccess(ctx);
}
private String etag(HashCode hash) {
return "\"" + hash + "\"";
}
private DateTimeFormatter dateTimeFormatter =
new DateTimeFormatterBuilder().appendPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")
.toFormatter()
.withChronology(IsoChronology.INSTANCE)
.withZone(ZoneOffset.UTC);
/**
* Handles GET /bucket/id with an x-amz-copy-source header.
*
* @param ctx the context describing the current request
* @param bucket the bucket containing the object to use as destination
* @param id name of the object to use as destination
*/
private void copyObject(WebContext ctx, Bucket bucket, String id, String copy) throws IOException {
StoredObject object = bucket.getObject(id);
/*
if (!object.exists()) {
signalObjectError(ctx, HttpResponseStatus.NOT_FOUND, "Object does not exist");
return;
}
*/
if (!copy.contains("/")) {
signalObjectError(ctx, HttpResponseStatus.BAD_REQUEST, "Source must contain '/'");
return;
}
String srcBucketName = copy.substring(1, copy.lastIndexOf("/"));
String srcId = copy.substring(copy.lastIndexOf("/") + 1);
Bucket srcBucket = storage.getBucket(srcBucketName);
if (!srcBucket.exists()) {
signalObjectError(ctx, HttpResponseStatus.BAD_REQUEST, "Source bucket does not exist");
return;
}
StoredObject src = srcBucket.getObject(srcId);
if (!src.exists()) {
signalObjectError(ctx, HttpResponseStatus.BAD_REQUEST, "Source object does not exist");
return;
}
Files.copy(src.getFile(), object.getFile());
if (src.getPropertiesFile().exists()) {
Files.copy(src.getPropertiesFile(), object.getPropertiesFile());
}
HashCode hash = Files.hash(object.getFile(), Hashing.md5());
String etag = etag(hash);
XMLStructuredOutput structuredOutput = ctx.respondWith().addHeader(HttpHeaders.Names.ETAG, etag).xml();
structuredOutput.beginOutput("CopyObjectResult");
structuredOutput.beginObject("LastModified");
structuredOutput.text(dateTimeFormatter.format(object.getLastModifiedInstant()));
structuredOutput.endObject();
structuredOutput.beginObject("ETag");
structuredOutput.text(etag);
structuredOutput.endObject();
structuredOutput.endOutput();
signalObjectSuccess(ctx);
}
/**
* Handles GET /bucket/id
*
* @param ctx the context describing the current request
* @param bucket the bucket containing the object to download
* @param id name of the object to use as download
*/
private void getObject(WebContext ctx, Bucket bucket, String id, boolean sendFile) throws Exception {
StoredObject object = bucket.getObject(id);
if (!object.exists()) {
signalObjectError(ctx, HttpResponseStatus.NOT_FOUND, "Object does not exist");
return;
}
Response response = ctx.respondWith();
for (Map.Entry entry : object.getProperties()) {
response.addHeader(entry.getKey().toString(), entry.getValue().toString());
}
if (sendFile) {
response.file(object.getFile());
} else {
response.status(HttpResponseStatus.OK);
}
signalObjectSuccess(ctx);
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy