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Diffstat (limited to 'app/src/main/java/moe/yuuta/gplicense/ServerManagedPolicy.java')
| -rw-r--r-- | app/src/main/java/moe/yuuta/gplicense/ServerManagedPolicy.java | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/app/src/main/java/moe/yuuta/gplicense/ServerManagedPolicy.java b/app/src/main/java/moe/yuuta/gplicense/ServerManagedPolicy.java deleted file mode 100644 index f3b2308..0000000 --- a/app/src/main/java/moe/yuuta/gplicense/ServerManagedPolicy.java +++ /dev/null @@ -1,282 +0,0 @@ -package moe.yuuta.gplicense; - -import android.content.Context; -import android.content.SharedPreferences; -import com.elvishew.xlog.Logger; -import com.elvishew.xlog.XLog; -import moe.yuuta.gplicense.util.URIQueryDecoder; - -import java.net.URI; -import java.net.URISyntaxException; -import java.util.HashMap; -import java.util.Map; - -/** - * Default policy. All policy decisions are based off of response data received - * from the licensing service. Specifically, the licensing server sends the - * following information: response validity period, error retry period, - * error retry count and a URL for restoring app access in unlicensed cases. - * <p> - * These values will vary based on the the way the application is configured in - * the Google Play publishing console, such as whether the application is - * marked as free or is within its refund period, as well as how often an - * application is checking with the licensing service. - * <p> - * Developers who need more fine grained control over their application's - * licensing policy should implement a custom Policy. - */ -public class ServerManagedPolicy implements Policy { - private final Logger logger = XLog.tag("DefPolicy").build(); - private static final String PREFS_FILE = "DefPol"; - private static final String PREF_LAST_RESPONSE = "la_resp"; - private static final String PREF_VALIDITY_TIMESTAMP = "ts"; - private static final String PREF_RETRY_UNTIL = "ret_utl"; - private static final String PREF_MAX_RETRIES = "max_ret"; - private static final String PREF_RETRY_COUNT = "ret_am"; - private static final String PREF_LICENSING_URL = "l_url"; - private static final String DEFAULT_VALIDITY_TIMESTAMP = "0"; - private static final String DEFAULT_RETRY_UNTIL = "0"; - private static final String DEFAULT_MAX_RETRIES = "0"; - private static final String DEFAULT_RETRY_COUNT = "0"; - - private static final long MILLIS_PER_MINUTE = 60 * 1000; - - private long mValidityTimestamp; - private long mRetryUntil; - private long mMaxRetries; - private long mRetryCount; - private long mLastResponseTime = 0; - private int mLastResponse; - private String mLicensingUrl; - private PreferenceObfuscator mPreferences; - - /** - * @param context The hostContext for the current application - * @param obfuscator An obfuscator to be used with preferences. - */ - public ServerManagedPolicy(Context context, Obfuscator obfuscator) { - // Import old values - SharedPreferences sp = context.getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE); - mPreferences = new PreferenceObfuscator(sp, obfuscator); - mLastResponse = Integer.parseInt( - mPreferences.getString(PREF_LAST_RESPONSE, Integer.toString(Policy.RETRY))); - mValidityTimestamp = Long.parseLong(mPreferences.getString(PREF_VALIDITY_TIMESTAMP, - DEFAULT_VALIDITY_TIMESTAMP)); - mRetryUntil = Long.parseLong(mPreferences.getString(PREF_RETRY_UNTIL, DEFAULT_RETRY_UNTIL)); - mMaxRetries = Long.parseLong(mPreferences.getString(PREF_MAX_RETRIES, DEFAULT_MAX_RETRIES)); - mRetryCount = Long.parseLong(mPreferences.getString(PREF_RETRY_COUNT, DEFAULT_RETRY_COUNT)); - mLicensingUrl = mPreferences.getString(PREF_LICENSING_URL, null); - } - - /** - * Process a new response from the license server. - * <p> - * This data will be used for computing future policy decisions. The - * following parameters are processed: - * <ul> - * <li>VT: the timestamp that the client should consider the response valid - * until - * <li>GT: the timestamp that the client should ignore retry errors until - * <li>GR: the number of retry errors that the client should ignore - * <li>LU: a deep link URL that can enable access for unlicensed apps (e.g. - * buy app on the Play Store) - * </ul> - * - * @param response the result from validating the server response - * @param rawData the raw server response data - */ - public void processServerResponse(int response, ResponseData rawData) { - - // Update retry counter - if (response != Policy.RETRY) { - setRetryCount(0); - } else { - setRetryCount(mRetryCount + 1); - } - - // Update server policy data - Map<String, String> extras = decodeExtras(rawData); - if (response == Policy.LICENSED) { - mLastResponse = response; - // Reset the licensing URL since it is only applicable for NOT_LICENSED responses. - setLicensingUrl(null); - setValidityTimestamp(extras.get("VT")); - setRetryUntil(extras.get("GT")); - setMaxRetries(extras.get("GR")); - } else if (response == Policy.NOT_LICENSED) { - // Clear out stale retry params - setValidityTimestamp(DEFAULT_VALIDITY_TIMESTAMP); - setRetryUntil(DEFAULT_RETRY_UNTIL); - setMaxRetries(DEFAULT_MAX_RETRIES); - // Update the licensing URL - setLicensingUrl(extras.get("LU")); - } - - setLastResponse(response); - mPreferences.commit(); - } - - /** - * Set the last license response received from the server and add to - * preferences. You must manually call PreferenceObfuscator.commit() to - * commit these changes to disk. - * - * @param l the response - */ - private void setLastResponse(int l) { - mLastResponseTime = System.currentTimeMillis(); - mLastResponse = l; - mPreferences.putString(PREF_LAST_RESPONSE, Integer.toString(l)); - } - - /** - * Set the current retry count and add to preferences. You must manually - * call PreferenceObfuscator.commit() to commit these changes to disk. - * - * @param c the new retry count - */ - private void setRetryCount(long c) { - mRetryCount = c; - mPreferences.putString(PREF_RETRY_COUNT, Long.toString(c)); - } - - public long getRetryCount() { - return mRetryCount; - } - - /** - * Set the last validity timestamp (VT) received from the server and add to - * preferences. You must manually call PreferenceObfuscator.commit() to - * commit these changes to disk. - * - * @param validityTimestamp the VT string received - */ - private void setValidityTimestamp(String validityTimestamp) { - Long lValidityTimestamp; - try { - lValidityTimestamp = Long.parseLong(validityTimestamp); - } catch (NumberFormatException e) { - // No response or not parsable, expire in one minute. - logger.w("Validity timestamp (VT) missing, caching for a minute"); - lValidityTimestamp = System.currentTimeMillis() + MILLIS_PER_MINUTE; - validityTimestamp = Long.toString(lValidityTimestamp); - } - - mValidityTimestamp = lValidityTimestamp; - mPreferences.putString(PREF_VALIDITY_TIMESTAMP, validityTimestamp); - } - - public long getValidityTimestamp() { - return mValidityTimestamp; - } - - /** - * Set the retry until timestamp (GT) received from the server and add to - * preferences. You must manually call PreferenceObfuscator.commit() to - * commit these changes to disk. - * - * @param retryUntil the GT string received - */ - private void setRetryUntil(String retryUntil) { - Long lRetryUntil; - try { - lRetryUntil = Long.parseLong(retryUntil); - } catch (NumberFormatException e) { - // No response or not parsable, expire immediately - logger.w("License retry timestamp (GT) missing, grace period disabled"); - retryUntil = "0"; - lRetryUntil = 0l; - } - - mRetryUntil = lRetryUntil; - mPreferences.putString(PREF_RETRY_UNTIL, retryUntil); - } - - public long getRetryUntil() { - return mRetryUntil; - } - - /** - * Set the max retries value (GR) as received from the server and add to - * preferences. You must manually call PreferenceObfuscator.commit() to - * commit these changes to disk. - * - * @param maxRetries the GR string received - */ - private void setMaxRetries(String maxRetries) { - Long lMaxRetries; - try { - lMaxRetries = Long.parseLong(maxRetries); - } catch (NumberFormatException e) { - // No response or not parsable, expire immediately - logger.w("Licence retry count (GR) missing, grace period disabled"); - maxRetries = "0"; - lMaxRetries = 0l; - } - - mMaxRetries = lMaxRetries; - mPreferences.putString(PREF_MAX_RETRIES, maxRetries); - } - - public long getMaxRetries() { - return mMaxRetries; - } - - /** - * Set the license URL value (LU) as received from the server and add to preferences. You must - * manually call PreferenceObfuscator.commit() to commit these changes to disk. - * - * @param url the LU string received - */ - private void setLicensingUrl(String url) { - mLicensingUrl = url; - mPreferences.putString(PREF_LICENSING_URL, url); - } - - public String getLicensingUrl() { - return mLicensingUrl; - } - - /** - * {@inheritDoc} - * - * This implementation allows access if either:<br> - * <ol> - * <li>a LICENSED response was received within the validity period - * <li>a RETRY response was received in the last minute, and we are under - * the RETRY count or in the RETRY period. - * </ol> - */ - public boolean allowAccess() { - long ts = System.currentTimeMillis(); - if (mLastResponse == Policy.LICENSED) { - // Check if the LICENSED response occurred within the validity timeout. - if (ts <= mValidityTimestamp) { - // Cached LICENSED response is still valid. - return true; - } - } else if (mLastResponse == Policy.RETRY && - ts < mLastResponseTime + MILLIS_PER_MINUTE) { - // Only allow access if we are within the retry period or we haven't used up our - // max retries. - return (ts <= mRetryUntil || mRetryCount <= mMaxRetries); - } - return false; - } - - private Map<String, String> decodeExtras(ResponseData rawData) { - Map<String, String> results = new HashMap<String, String>(); - if (rawData == null) { - return results; - } - - try { - URI rawExtras = new URI("?" + rawData.extra); - URIQueryDecoder.DecodeQuery(rawExtras, results); - } catch (URISyntaxException e) { - logger.w("Invalid syntax error while decoding extras data from server."); - } - return results; - } - -}
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