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Factor out AWS HTTP constants 

Mirrors Guava HttpHeaders.
opaque-etag
Andrew Gaul 2019-02-16 19:17:21 +09:00
rodzic 25e7bbd5b4
commit 4f81c17e11
3 zmienionych plików z 95 dodań i 52 usunięć
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40
src/main/java/org/gaul/s3proxy/AwsHttpHeaders.java 100644
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@ -0,0 +1,40 @@
/*
* Copyright 2014-2018 Andrew Gaul <andrew@gaul.org>
*
* 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 org.gaul.s3proxy;
final class AwsHttpHeaders {
static final String ACL = "x-amz-acl";
static final String CONTENT_SHA256 = "x-amz-content-sha256";
static final String COPY_SOURCE = "x-amz-copy-source";
static final String COPY_SOURCE_IF_MATCH = "x-amz-copy-source-if-match";
static final String COPY_SOURCE_IF_MODIFIED_SINCE =
"x-amz-copy-source-if-modified-since";
static final String COPY_SOURCE_IF_NONE_MATCH =
"x-amz-copy-source-if-none-match";
static final String COPY_SOURCE_IF_UNMODIFIED_SINCE =
"x-amz-copy-source-if-unmodified-since";
static final String COPY_SOURCE_RANGE = "x-amz-copy-source-range";
static final String DATE = "x-amz-date";
static final String DECODED_CONTENT_LENGTH =
"x-amz-decoded-content-length";
static final String METADATA_DIRECTIVE = "x-amz-metadata-directive";
static final String STORAGE_CLASS = "x-amz-storage-class";
private AwsHttpHeaders() {
throw new AssertionError("intentionally unimplemented");
}
}

13
src/main/java/org/gaul/s3proxy/AwsSignature.java
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@ -94,7 +94,7 @@ final class AwsSignature {
request.getHeaders(headerName)); request.getHeaders(headerName));
headerName = headerName.toLowerCase(); headerName = headerName.toLowerCase();
if (!headerName.startsWith("x-amz-") || (bothDateHeader && if (!headerName.startsWith("x-amz-") || (bothDateHeader &&
headerName.equalsIgnoreCase("x-amz-date"))) { headerName.equalsIgnoreCase(AwsHttpHeaders.DATE))) {
continue; continue;
} }
if (headerValues.isEmpty()) { if (headerValues.isEmpty()) {
@ -125,14 +125,14 @@ final class AwsSignature {
builder.append(Strings.nullToEmpty(expires)); builder.append(Strings.nullToEmpty(expires));
} else { } else {
if (!bothDateHeader) { if (!bothDateHeader) {
if (canonicalizedHeaders.containsKey("x-amz-date")) { if (canonicalizedHeaders.containsKey(AwsHttpHeaders.DATE)) {
builder.append(""); builder.append("");
} else { } else {
builder.append(request.getHeader(HttpHeaders.DATE)); builder.append(request.getHeader(HttpHeaders.DATE));
} }
} else { } else {
if (!canonicalizedHeaders.containsKey("x-amz-date")) { if (!canonicalizedHeaders.containsKey(AwsHttpHeaders.DATE)) {
builder.append(request.getHeader("x-amz-date")); builder.append(request.getHeader(AwsHttpHeaders.DATE));
} else { } else {
// panic // panic
} }
@ -258,7 +258,8 @@ final class AwsSignature {
String hashAlgorithm) String hashAlgorithm)
throws IOException, NoSuchAlgorithmException { throws IOException, NoSuchAlgorithmException {
String authorizationHeader = request.getHeader("Authorization"); String authorizationHeader = request.getHeader("Authorization");
String xAmzContentSha256 = request.getHeader("x-amz-content-sha256"); String xAmzContentSha256 = request.getHeader(
AwsHttpHeaders.CONTENT_SHA256);
if (xAmzContentSha256 == null) { if (xAmzContentSha256 == null) {
xAmzContentSha256 = request.getParameter("X-Amz-SignedHeaders"); xAmzContentSha256 = request.getParameter("X-Amz-SignedHeaders");
} }
@ -336,7 +337,7 @@ final class AwsSignature {
byte[] signingKey = signMessage( byte[] signingKey = signMessage(
"aws4_request".getBytes(StandardCharsets.UTF_8), "aws4_request".getBytes(StandardCharsets.UTF_8),
dateRegionServiceKey, algorithm); dateRegionServiceKey, algorithm);
String date = request.getHeader("x-amz-date"); String date = request.getHeader(AwsHttpHeaders.DATE);
if (date == null) { if (date == null) {
date = request.getParameter("X-Amz-Date"); date = request.getParameter("X-Amz-Date");
} }

94
src/main/java/org/gaul/s3proxy/S3ProxyHandler.java
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@ -158,18 +158,18 @@ public class S3ProxyHandler {
); );
/** All supported x-amz- headers, except for x-amz-meta- user metadata. */ /** All supported x-amz- headers, except for x-amz-meta- user metadata. */
private static final Set<String> SUPPORTED_X_AMZ_HEADERS = ImmutableSet.of( private static final Set<String> SUPPORTED_X_AMZ_HEADERS = ImmutableSet.of(
"x-amz-acl", AwsHttpHeaders.ACL,
"x-amz-content-sha256", AwsHttpHeaders.CONTENT_SHA256,
"x-amz-copy-source", AwsHttpHeaders.COPY_SOURCE,
"x-amz-copy-source-if-match", AwsHttpHeaders.COPY_SOURCE_IF_MATCH,
"x-amz-copy-source-if-modified-since", AwsHttpHeaders.COPY_SOURCE_IF_MODIFIED_SINCE,
"x-amz-copy-source-if-none-match", AwsHttpHeaders.COPY_SOURCE_IF_NONE_MATCH,
"x-amz-copy-source-if-unmodified-since", AwsHttpHeaders.COPY_SOURCE_IF_UNMODIFIED_SINCE,
"x-amz-copy-source-range", AwsHttpHeaders.COPY_SOURCE_RANGE,
"x-amz-date", AwsHttpHeaders.DATE,
"x-amz-decoded-content-length", AwsHttpHeaders.DECODED_CONTENT_LENGTH,
"x-amz-metadata-directive", AwsHttpHeaders.METADATA_DIRECTIVE,
"x-amz-storage-class" AwsHttpHeaders.STORAGE_CLASS
); );
private static final Set<String> CANNED_ACLS = ImmutableSet.of( private static final Set<String> CANNED_ACLS = ImmutableSet.of(
"private", "private",
@ -307,11 +307,11 @@ public class S3ProxyHandler {
} }
if (headerName.equalsIgnoreCase(HttpHeaders.DATE)) { if (headerName.equalsIgnoreCase(HttpHeaders.DATE)) {
hasDateHeader = true; hasDateHeader = true;
} else if (headerName.equalsIgnoreCase("x-amz-date")) { } else if (headerName.equalsIgnoreCase(AwsHttpHeaders.DATE)) {
logger.debug("have the x-amz-date heaer {}", headerName); logger.debug("have the x-amz-date heaer {}", headerName);
// why x-amz-date name exist,but value is null? // why x-amz-date name exist,but value is null?
if ("".equals(request.getHeader("x-amz-date")) || if ("".equals(request.getHeader(AwsHttpHeaders.DATE)) ||
request.getHeader("x-amz-date") == null) { request.getHeader(AwsHttpHeaders.DATE) == null) {
logger.debug("have empty x-amz-date"); logger.debug("have empty x-amz-date");
} else { } else {
hasXAmzDateHeader = true; hasXAmzDateHeader = true;
@ -421,14 +421,15 @@ public class S3ProxyHandler {
if (hasXAmzDateHeader) { //format diff between v2 and v4 if (hasXAmzDateHeader) { //format diff between v2 and v4
if (finalAuthType == AuthenticationType.AWS_V2) { if (finalAuthType == AuthenticationType.AWS_V2) {
dateSkew = request.getDateHeader("x-amz-date"); dateSkew = request.getDateHeader(AwsHttpHeaders.DATE);
dateSkew /= 1000; dateSkew /= 1000;
//case sensetive? //case sensetive?
} else if (finalAuthType == AuthenticationType.AWS_V4) { } else if (finalAuthType == AuthenticationType.AWS_V4) {
logger.debug("into process v4 {}", logger.debug("into process v4 {}",
request.getHeader("x-amz-date")); request.getHeader(AwsHttpHeaders.DATE));
dateSkew = parseIso8601(request.getHeader("x-amz-date")); dateSkew = parseIso8601(request.getHeader(
AwsHttpHeaders.DATE));
} }
} else if (request.getParameter("X-Amz-Date") != null) { // v4 query } else if (request.getParameter("X-Amz-Date") != null) { // v4 query
String dateString = request.getParameter("X-Amz-Date"); String dateString = request.getParameter("X-Amz-Date");
@ -464,7 +465,8 @@ public class S3ProxyHandler {
path.length > 2 ? path[2] : null); path.length > 2 ? path[2] : null);
if (anonymousIdentity) { if (anonymousIdentity) {
blobStore = provider.getValue(); blobStore = provider.getValue();
String contentSha256 = request.getHeader("x-amz-content-sha256"); String contentSha256 = request.getHeader(
AwsHttpHeaders.CONTENT_SHA256);
if ("STREAMING-AWS4-HMAC-SHA256-PAYLOAD".equals(contentSha256)) { if ("STREAMING-AWS4-HMAC-SHA256-PAYLOAD".equals(contentSha256)) {
is = new ChunkedInputStream(is); is = new ChunkedInputStream(is);
} }
@ -538,7 +540,7 @@ public class S3ProxyHandler {
haveBothDateHeader); haveBothDateHeader);
} else { } else {
String contentSha256 = request.getHeader( String contentSha256 = request.getHeader(
"x-amz-content-sha256"); AwsHttpHeaders.CONTENT_SHA256);
try { try {
byte[] payload; byte[] payload;
if (request.getParameter("X-Amz-Algorithm") != null) { if (request.getParameter("X-Amz-Algorithm") != null) {
@ -606,7 +608,7 @@ public class S3ProxyHandler {
if (!headerName.startsWith("x-amz-")) { if (!headerName.startsWith("x-amz-")) {
continue; continue;
} }
if (headerName.startsWith("x-amz-meta-")) { if (headerName.startsWith(USER_METADATA_PREFIX)) {
continue; continue;
} }
if (!SUPPORTED_X_AMZ_HEADERS.contains(headerName.toLowerCase())) { if (!SUPPORTED_X_AMZ_HEADERS.contains(headerName.toLowerCase())) {
@ -708,7 +710,7 @@ public class S3ProxyHandler {
path[1]); path[1]);
return; return;
} else if (uploadId != null) { } else if (uploadId != null) {
if (request.getHeader("x-amz-copy-source") != null) { if (request.getHeader(AwsHttpHeaders.COPY_SOURCE) != null) {
handleCopyPart(request, response, blobStore, path[1], handleCopyPart(request, response, blobStore, path[1],
path[2], uploadId); path[2], uploadId);
} else { } else {
@ -716,7 +718,7 @@ public class S3ProxyHandler {
path[2], uploadId); path[2], uploadId);
} }
return; return;
} else if (request.getHeader("x-amz-copy-source") != null) { } else if (request.getHeader(AwsHttpHeaders.COPY_SOURCE) != null) {
handleCopyBlob(request, response, is, blobStore, path[1], handleCopyBlob(request, response, is, blobStore, path[1],
path[2]); path[2]);
return; return;
@ -902,7 +904,7 @@ public class S3ProxyHandler {
String containerName) throws IOException, S3Exception { String containerName) throws IOException, S3Exception {
ContainerAccess access; ContainerAccess access;
String cannedAcl = request.getHeader("x-amz-acl"); String cannedAcl = request.getHeader(AwsHttpHeaders.ACL);
if (cannedAcl == null || "private".equalsIgnoreCase(cannedAcl)) { if (cannedAcl == null || "private".equalsIgnoreCase(cannedAcl)) {
access = ContainerAccess.PRIVATE; access = ContainerAccess.PRIVATE;
} else if ("public-read".equalsIgnoreCase(cannedAcl)) { } else if ("public-read".equalsIgnoreCase(cannedAcl)) {
@ -1001,7 +1003,7 @@ public class S3ProxyHandler {
throws IOException, S3Exception { throws IOException, S3Exception {
BlobAccess access; BlobAccess access;
String cannedAcl = request.getHeader("x-amz-acl"); String cannedAcl = request.getHeader(AwsHttpHeaders.ACL);
if (cannedAcl == null || "private".equalsIgnoreCase(cannedAcl)) { if (cannedAcl == null || "private".equalsIgnoreCase(cannedAcl)) {
access = BlobAccess.PRIVATE; access = BlobAccess.PRIVATE;
} else if ("public-read".equalsIgnoreCase(cannedAcl)) { } else if ("public-read".equalsIgnoreCase(cannedAcl)) {
@ -1250,7 +1252,7 @@ public class S3ProxyHandler {
logger.debug("Creating bucket with location: {}", location); logger.debug("Creating bucket with location: {}", location);
CreateContainerOptions options = new CreateContainerOptions(); CreateContainerOptions options = new CreateContainerOptions();
String acl = request.getHeader("x-amz-acl"); String acl = request.getHeader(AwsHttpHeaders.ACL);
if ("public-read".equalsIgnoreCase(acl)) { if ("public-read".equalsIgnoreCase(acl)) {
options.publicRead(); options.publicRead();
} }
@ -1715,7 +1717,7 @@ public class S3ProxyHandler {
HttpServletResponse response, InputStream is, BlobStore blobStore, HttpServletResponse response, InputStream is, BlobStore blobStore,
String destContainerName, String destBlobName) String destContainerName, String destBlobName)
throws IOException, S3Exception { throws IOException, S3Exception {
String copySourceHeader = request.getHeader("x-amz-copy-source"); String copySourceHeader = request.getHeader(AwsHttpHeaders.COPY_SOURCE);
copySourceHeader = URLDecoder.decode(copySourceHeader, UTF_8); copySourceHeader = URLDecoder.decode(copySourceHeader, UTF_8);
if (copySourceHeader.startsWith("/")) { if (copySourceHeader.startsWith("/")) {
// Some clients like boto do not include the leading slash // Some clients like boto do not include the leading slash
@ -1728,7 +1730,7 @@ public class S3ProxyHandler {
String sourceContainerName = path[0]; String sourceContainerName = path[0];
String sourceBlobName = path[1]; String sourceBlobName = path[1];
boolean replaceMetadata = "REPLACE".equalsIgnoreCase(request.getHeader( boolean replaceMetadata = "REPLACE".equalsIgnoreCase(request.getHeader(
"x-amz-metadata-directive")); AwsHttpHeaders.METADATA_DIRECTIVE));
if (sourceContainerName.equals(destContainerName) && if (sourceContainerName.equals(destContainerName) &&
sourceBlobName.equals(destBlobName) && sourceBlobName.equals(destBlobName) &&
@ -1738,22 +1740,22 @@ public class S3ProxyHandler {
CopyOptions.Builder options = CopyOptions.builder(); CopyOptions.Builder options = CopyOptions.builder();
String ifMatch = request.getHeader("x-amz-copy-source-if-match"); String ifMatch = request.getHeader(AwsHttpHeaders.COPY_SOURCE_IF_MATCH);
if (ifMatch != null) { if (ifMatch != null) {
options.ifMatch(ifMatch); options.ifMatch(ifMatch);
} }
String ifNoneMatch = request.getHeader( String ifNoneMatch = request.getHeader(
"x-amz-copy-source-if-none-match"); AwsHttpHeaders.COPY_SOURCE_IF_NONE_MATCH);
if (ifNoneMatch != null) { if (ifNoneMatch != null) {
options.ifNoneMatch(ifNoneMatch); options.ifNoneMatch(ifNoneMatch);
} }
long ifModifiedSince = request.getDateHeader( long ifModifiedSince = request.getDateHeader(
"x-amz-copy-source-if-modified-since"); AwsHttpHeaders.COPY_SOURCE_IF_MODIFIED_SINCE);
if (ifModifiedSince != -1) { if (ifModifiedSince != -1) {
options.ifModifiedSince(new Date(ifModifiedSince)); options.ifModifiedSince(new Date(ifModifiedSince));
} }
long ifUnmodifiedSince = request.getDateHeader( long ifUnmodifiedSince = request.getDateHeader(
"x-amz-copy-source-if-unmodified-since"); AwsHttpHeaders.COPY_SOURCE_IF_UNMODIFIED_SINCE);
if (ifUnmodifiedSince != -1) { if (ifUnmodifiedSince != -1) {
options.ifUnmodifiedSince(new Date(ifUnmodifiedSince)); options.ifUnmodifiedSince(new Date(ifUnmodifiedSince));
} }
@ -1804,7 +1806,7 @@ public class S3ProxyHandler {
} }
// TODO: jclouds should include this in CopyOptions // TODO: jclouds should include this in CopyOptions
String cannedAcl = request.getHeader("x-amz-acl"); String cannedAcl = request.getHeader(AwsHttpHeaders.ACL);
if (cannedAcl != null && !cannedAcl.equalsIgnoreCase("private")) { if (cannedAcl != null && !cannedAcl.equalsIgnoreCase("private")) {
handleSetBlobAcl(request, response, is, blobStore, handleSetBlobAcl(request, response, is, blobStore,
destContainerName, destBlobName); destContainerName, destBlobName);
@ -1847,7 +1849,7 @@ public class S3ProxyHandler {
if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_LENGTH)) { if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_LENGTH)) {
contentLengthString = headerValue; contentLengthString = headerValue;
} else if (headerName.equalsIgnoreCase( } else if (headerName.equalsIgnoreCase(
"x-amz-decoded-content-length")) { AwsHttpHeaders.DECODED_CONTENT_LENGTH)) {
decodedContentLengthString = headerValue; decodedContentLengthString = headerValue;
} else if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_MD5)) { } else if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_MD5)) {
contentMD5String = headerValue; contentMD5String = headerValue;
@ -1884,7 +1886,7 @@ public class S3ProxyHandler {
} }
BlobAccess access; BlobAccess access;
String cannedAcl = request.getHeader("x-amz-acl"); String cannedAcl = request.getHeader(AwsHttpHeaders.ACL);
if (cannedAcl == null || cannedAcl.equalsIgnoreCase("private")) { if (cannedAcl == null || cannedAcl.equalsIgnoreCase("private")) {
access = BlobAccess.PRIVATE; access = BlobAccess.PRIVATE;
} else if (cannedAcl.equalsIgnoreCase("public-read")) { } else if (cannedAcl.equalsIgnoreCase("public-read")) {
@ -1910,7 +1912,7 @@ public class S3ProxyHandler {
.payload(is) .payload(is)
.contentLength(contentLength); .contentLength(contentLength);
String storageClass = request.getHeader("x-amz-storage-class"); String storageClass = request.getHeader(AwsHttpHeaders.STORAGE_CLASS);
if (storageClass == null || storageClass.equalsIgnoreCase("STANDARD")) { if (storageClass == null || storageClass.equalsIgnoreCase("STANDARD")) {
// defaults to STANDARD // defaults to STANDARD
} else { } else {
@ -2118,7 +2120,7 @@ public class S3ProxyHandler {
addContentMetdataFromHttpRequest(builder, request); addContentMetdataFromHttpRequest(builder, request);
builder.contentLength(payload.size()); builder.contentLength(payload.size());
String storageClass = request.getHeader("x-amz-storage-class"); String storageClass = request.getHeader(AwsHttpHeaders.STORAGE_CLASS);
if (storageClass == null || storageClass.equalsIgnoreCase("STANDARD")) { if (storageClass == null || storageClass.equalsIgnoreCase("STANDARD")) {
// defaults to STANDARD // defaults to STANDARD
} else { } else {
@ -2126,7 +2128,7 @@ public class S3ProxyHandler {
} }
BlobAccess access; BlobAccess access;
String cannedAcl = request.getHeader("x-amz-acl"); String cannedAcl = request.getHeader(AwsHttpHeaders.ACL);
if (cannedAcl == null || cannedAcl.equalsIgnoreCase("private")) { if (cannedAcl == null || cannedAcl.equalsIgnoreCase("private")) {
access = BlobAccess.PRIVATE; access = BlobAccess.PRIVATE;
} else if (cannedAcl.equalsIgnoreCase("public-read")) { } else if (cannedAcl.equalsIgnoreCase("public-read")) {
@ -2428,7 +2430,7 @@ public class S3ProxyHandler {
String containerName, String blobName, String uploadId) String containerName, String blobName, String uploadId)
throws IOException, S3Exception { throws IOException, S3Exception {
// TODO: duplicated from handlePutBlob // TODO: duplicated from handlePutBlob
String copySourceHeader = request.getHeader("x-amz-copy-source"); String copySourceHeader = request.getHeader(AwsHttpHeaders.COPY_SOURCE);
copySourceHeader = URLDecoder.decode(copySourceHeader, UTF_8); copySourceHeader = URLDecoder.decode(copySourceHeader, UTF_8);
if (copySourceHeader.startsWith("/")) { if (copySourceHeader.startsWith("/")) {
// Some clients like boto do not include the leading slash // Some clients like boto do not include the leading slash
@ -2442,7 +2444,7 @@ public class S3ProxyHandler {
String sourceBlobName = path[1]; String sourceBlobName = path[1];
GetOptions options = new GetOptions(); GetOptions options = new GetOptions();
String range = request.getHeader("x-amz-copy-source-range"); String range = request.getHeader(AwsHttpHeaders.COPY_SOURCE_RANGE);
long expectedSize = -1; long expectedSize = -1;
if (range != null && range.startsWith("bytes=") && if (range != null && range.startsWith("bytes=") &&
// ignore multiple ranges // ignore multiple ranges
@ -2501,13 +2503,13 @@ public class S3ProxyHandler {
} }
String ifMatch = request.getHeader( String ifMatch = request.getHeader(
"x-amz-copy-source-if-match"); AwsHttpHeaders.COPY_SOURCE_IF_MATCH);
String ifNoneMatch = request.getHeader( String ifNoneMatch = request.getHeader(
"x-amz-copy-source-if-none-match"); AwsHttpHeaders.COPY_SOURCE_IF_NONE_MATCH);
long ifModifiedSince = request.getDateHeader( long ifModifiedSince = request.getDateHeader(
"x-amz-copy-source-if-modified-since"); AwsHttpHeaders.COPY_SOURCE_IF_MODIFIED_SINCE);
long ifUnmodifiedSince = request.getDateHeader( long ifUnmodifiedSince = request.getDateHeader(
"x-amz-copy-source-if-unmodified-since"); AwsHttpHeaders.COPY_SOURCE_IF_UNMODIFIED_SINCE);
String eTag = blobMetadata.getETag(); String eTag = blobMetadata.getETag();
if (eTag != null) { if (eTag != null) {
eTag = maybeQuoteETag(eTag); eTag = maybeQuoteETag(eTag);
@ -2602,7 +2604,7 @@ public class S3ProxyHandler {
if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_LENGTH)) { if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_LENGTH)) {
contentLengthString = headerValue; contentLengthString = headerValue;
} else if (headerName.equalsIgnoreCase( } else if (headerName.equalsIgnoreCase(
"x-amz-decoded-content-length")) { AwsHttpHeaders.DECODED_CONTENT_LENGTH)) {
decodedContentLengthString = headerValue; decodedContentLengthString = headerValue;
} else if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_MD5)) { } else if (headerName.equalsIgnoreCase(HttpHeaders.CONTENT_MD5)) {
contentMD5String = headerValue; contentMD5String = headerValue;
@ -2763,7 +2765,7 @@ public class S3ProxyHandler {
metadata.getLastModified().getTime()); metadata.getLastModified().getTime());
Tier tier = metadata.getTier(); Tier tier = metadata.getTier();
if (tier != null) { if (tier != null) {
response.addHeader("x-amz-storage-class", response.addHeader(AwsHttpHeaders.STORAGE_CLASS,
StorageClass.fromTier(tier).toString()); StorageClass.fromTier(tier).toString());
} }
for (Map.Entry<String, String> entry : for (Map.Entry<String, String> entry :