com.spotify.docker.client.ImageRef Maven / Gradle / Ivy
/*-
* -\-\-
* docker-client
* --
* Copyright (C) 2016 Spotify AB
* --
* 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 com.spotify.docker.client;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.MoreObjects;
public class ImageRef {
private static final String DEFAULT_REGISTRY = "docker.io";
private static final String DEFAULT_REGISTRY_URL = "https://index.docker.io/v1/";
private final String registryUrl;
private final String registry;
private final String image;
private final String tag;
public ImageRef(final String image) {
final int lastAt = image.lastIndexOf('@');
final int lastColon = image.lastIndexOf(':');
if (lastAt >= 0) {
this.image = image;
this.tag = null;
} else if (lastColon < 0) {
this.image = image;
this.tag = null;
} else {
final String tag = image.substring(lastColon + 1);
if (tag.indexOf('/') < 0) {
this.image = image.substring(0, lastColon);
this.tag = tag;
} else {
this.image = image;
this.tag = null;
}
}
final String[] parts = image.split("/", 2);
if (parts.length > 1 && isRegistry(parts[0])) {
this.registry = parts[0];
this.registryUrl = parseRegistryUrl(parts[0]);
} else {
this.registry = DEFAULT_REGISTRY;
this.registryUrl = DEFAULT_REGISTRY_URL;
}
}
private static boolean isRegistry(String part) {
return part.contains(".");
}
public String getImage() {
return image;
}
/** The image tag, or null if not set. */
public String getTag() {
return tag;
}
/** Hostname/ip address and port of the registry. */
public String getRegistryName() {
return registry;
}
/** Registry URL. */
public String getRegistryUrl() {
return registryUrl;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this)
.add("registry", registry)
.add("image", image)
.add("tag", tag)
.toString();
}
/** Return registry server address given first part of image. */
@VisibleForTesting
static String parseRegistryUrl(final String url) {
if (url.equals("docker.io") || url.equals("index.docker.io")) {
return DEFAULT_REGISTRY_URL;
} else if (url.matches("(^|(\\w+)\\.)gcr\\.io$") || url.equals("gcr.kubernetes.io")) {
// GCR uses https
return "https://" + url;
} else if (url.equals("quay.io")) {
// Quay doesn't use any protocol in credentials file
return "quay.io";
} else if (!url.contains("http://") && !url.contains("https://")) {
// Assume https
return "https://" + url;
} else {
return url;
}
}
}