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The Urban Airship Java client library
/*
* Copyright (c) 2013-2016. Urban Airship and Contributors
*/
package com.urbanairship.api.client;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.io.BaseEncoding;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
/**
* The UrbanAirshipClient class handles HTTP requests to the Urban Airship API.
*/
public class UrbanAirshipClient implements Closeable {
private static final Logger log = LoggerFactory.getLogger(UrbanAirshipClient.class);
private final RequestClient client;
private final String key;
private final Optional secret;
private final Optional bearerToken;
private String userAgent;
public static final String EU_URI = "https://go.airship.eu";
private UrbanAirshipClient(Builder builder) {
this.client = builder.client;
this.key = builder.key;
this.secret = Optional.ofNullable(builder.secret);
this.bearerToken = Optional.ofNullable(builder.bearerToken);
userAgent = getUserAgent(builder.key);
}
/**
* New UrbanAirshipClient Builder.
*
* @return UrbanAirshipClient Builder.
*/
public static Builder newBuilder() {
return new Builder();
}
public Future executeAsync(final Request request, ResponseCallback callback) {
return client.executeAsync(request, callback, createHeaders(request));
}
public Future executeAsync(Request request) {
return executeAsync(request, null);
}
public Response execute(Request request) throws IOException {
return execute(request, null);
}
public Response execute(Request request, ResponseCallback callback) throws IOException {
try {
return executeAsync(request, callback).get();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException("Thread interrupted while retrieving response from future", e);
} catch (ExecutionException e) {
throw new RuntimeException("Failed to retrieve response from future", e);
}
}
private Map createHeaders(Request request) {
Map headers = new HashMap<>();
headers.put("User-Agent", userAgent);
Map requestHeaders = request.getRequestHeaders();
if (requestHeaders != null) {
for (Map.Entry entry : requestHeaders.entrySet()) {
headers.put(entry.getKey(), entry.getValue());
}
}
String auth;
if (request.bearerTokenAuthRequired()) {
Preconditions.checkArgument(bearerToken.isPresent(), "Bearer token required for request: " + request);
auth = "Bearer " + getBearerToken().get();
} else if (getAppSecret().isPresent()) {
auth = "Basic " + BaseEncoding.base64().encode((getAppKey() + ":" + getAppSecret().get()).getBytes());
} else if (bearerToken.isPresent() && request.canUseBearerTokenAuth()){
auth = "Bearer " + getBearerToken().get();
} else {
throw new IllegalArgumentException("Bearer token auth not supported for this request, app secret must be set for request: " + request);
}
headers.put("Authorization", auth);
headers.put("X-UA-Appkey", getAppKey());
return headers;
}
/**
* Retrieve the client user agent.
*
* @param appKey String
* @return The user agent.
*/
@VisibleForTesting
public String getUserAgent(String appKey) {
String userAgent = "UNKNOWN";
InputStream stream = getClass().getResourceAsStream("/client.properties");
if (stream != null) {
Properties props = new Properties();
try {
props.load(stream);
stream.close();
userAgent = "UAJavaLib/" + props.get("client.version") + " " + appKey;
} catch (IOException e) {
log.error("Failed to retrieve client user agent due to IOException - setting to \"UNKNOWN\"", e);
}
}
return userAgent;
}
/**
* Close the underlying HTTP client's thread pool.
*/
@Override
public void close() throws IOException {
log.info("Closing client");
client.close();
}
/**
* Get the app key.
*
* @return The app key.
*/
public String getAppKey() {
return key;
}
/**
* Get the app secret.
*
* @return The app secret.
*/
public Optional getAppSecret() {
return secret;
}
/**
* Get the bearer token.
*
* @return The bearer token.
*/
public Optional getBearerToken() {
return bearerToken;
}
/**
* Get the request client.
*
* @return The RequestClient.
*/
public RequestClient getRequestClient() {
return client;
}
/**
* UrbanAirshipClient builder.
*/
public static class Builder {
private String key;
private String secret;
private String bearerToken;
private String baseUri = "https://go.urbanairship.com";
private RequestClient client;
/**
* Set the app key.
*
* @param key String app key
* @return Builder
*/
public Builder setKey(String key) {
this.key = key;
return this;
}
/**
* Set the app secret.
*
* @param appSecret String app secret
* @return Builder
*/
public Builder setSecret(String appSecret) {
this.secret = appSecret;
return this;
}
/**
* Changes base URI. Without changing URI, it defaults to
* https://go.urbanairship.com. To send to European Servers use
* UrbanAirshipClient.EU_URI
*
* @param baseUri String baseUri used for requests
* @return Builder
*/
public Builder setBaseUri(String baseUri) {
this.baseUri = baseUri;
return this;
}
/**
* Set the bearer token.
*
* @param bearerToken String bearer token
* @return Builder
*/
public Builder setBearerToken(String bearerToken) {
this.bearerToken = bearerToken;
return this;
}
/**
* Set a custom client.
*
* @param client RequestClient client
* @return Builder
*/
public Builder setClient(RequestClient client) {
this.client = client;
return this;
}
/**
* Build an UrbanAirshipClient object. Will fail if any of the following
* preconditions are not met.
*
*
* 1. App key or client must be set.
* 2. App secret or bearer token must be set if no client is provided.
* 3. The base URI has been overridden but not set.
* 4. Max for non-POST 5xx retries must be set, already defaults to 10 when using the default client.
* 5. HTTP client config builder must be set in the default client, already defaults to a new builder.
*
*
* @return UrbanAirshipClient
*/
public UrbanAirshipClient build() {
Preconditions.checkNotNull(key, "app key needed to build APIClient");
if (secret == null && bearerToken == null) {
throw new NullPointerException("secret or the bearer token must be set");
}
if (client == null) {
client = AsyncRequestClient.newBuilder().setBaseUri(baseUri).build();
}
return new UrbanAirshipClient(this);
}
}
}
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