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/**
* Copyright (c) 2015-present, Facebook, Inc. All rights reserved.
*
* You are hereby granted a non-exclusive, worldwide, royalty-free license to
* use, copy, modify, and distribute this software in source code or binary
* form for use in connection with the web services and APIs provided by
* Facebook.
*
* As with any software that integrates with the Facebook platform, your use
* of this software is subject to the Facebook Developer Principles and
* Policies [http://developers.facebook.com/policy/]. This copyright notice
* shall be included in all copies or substantial portions of the software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
package com.facebook.ads.sdk;
import java.io.PrintStream;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
public class APIContext {
public static final String DEFAULT_API_BASE = APIConfig.DEFAULT_API_BASE;
public static final String DEFAULT_API_VERSION = APIConfig.DEFAULT_API_VERSION;
public static final String DEFAULT_VIDEO_API_BASE = APIConfig.DEFAULT_VIDEO_API_BASE;
private String endpointBase;
private String videoEndpointBase;
private String accessToken;
private String appSecret;
private String version;
protected boolean isDebug = false;
protected PrintStream logger = System.out;
public APIContext(String endpointBase, String videoEndpointBase, String version, String accessToken, String appSecret) {
this.version = version;
this.endpointBase = endpointBase;
this.videoEndpointBase = videoEndpointBase;
this.accessToken = accessToken;
this.appSecret = appSecret;
}
public APIContext(String accessToken) {
this(DEFAULT_API_BASE, DEFAULT_VIDEO_API_BASE, DEFAULT_API_VERSION, accessToken, null);
}
public APIContext(String accessToken, String appSecret) {
this(DEFAULT_API_BASE, DEFAULT_VIDEO_API_BASE, DEFAULT_API_VERSION, accessToken, appSecret);
}
public String getEndpointBase() {
return this.endpointBase;
}
public String getVideoEndpointBase() {
return this.videoEndpointBase;
}
public String getAccessToken() {
return this.accessToken;
}
public String getAppSecret() {
return this.appSecret;
}
public boolean hasAppSecret() {
return appSecret != null;
}
public String getAppSecretProof() {
return sha256(appSecret, accessToken);
}
public String getVersion() {
return this.version;
}
public boolean isDebug() {
return this.isDebug;
}
public APIContext enableDebug(boolean isDebug) {
this.isDebug = isDebug;
return this;
}
public PrintStream getLogger() {
return this.logger;
}
public APIContext setLogger(PrintStream logger) {
this.logger = logger;
return this;
}
public void log(String s) {
if (isDebug && logger != null) logger.println(s);
}
public static String sha256(String secret, String message) {
try {
Mac sha256HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secretKey = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
sha256HMAC.init(secretKey);
byte[] bytes = sha256HMAC.doFinal(message.getBytes());
return toHex(bytes);
} catch(Exception e){
throw new IllegalArgumentException(
"The provided app secret or access token is invalid!"
);
}
}
public static String toHex(byte[] bytes) {
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
sb.append(String.format("%1$02x", b));
}
return sb.toString();
}
}
