private CvalInfo askLicenseServer(
String productName, String productKey, String productVersion, CvalInfo info)
throws UnreachableCvalServerException {
int majorVersion = computeMajorVersion(productVersion);
// If we have a valid license info here, it means that we got it from
// cache.
// We add a grace time when so as if the server is unreachable
// we allow the user to use the product.
if (info != null && info.getExpiredEpoch() != null && !"evaluation".equals(info.getType())) {
long ts = info.getExpiredEpoch().getTime() + GRACE_DAYS_MSECS;
info.setExpiredEpoch(new Date(ts));
}
boolean validCache =
info != null
&& info.isValidInfo(productName, productKey)
&& info.isValidVersion(majorVersion)
&& !info.isLicenseExpired();
// if we have a validCache we set the timeout smaller
int timeout = validCache ? 2000 : 10000;
try {
CvalInfo srvinfo =
parseJson(provider.askServer(productName + "-" + productVersion, productKey, timeout));
if (srvinfo != null
&& srvinfo.isValidInfo(productName, productKey)
&& srvinfo.isValidVersion(majorVersion)) {
// We always cache the info if it is valid although it is
// expired
cacheLicenseInfo(srvinfo);
info = srvinfo;
}
} catch (FileNotFoundException e) {
// 404
return null;
} catch (Exception e) {
if (info == null) {
throw new UnreachableCvalServerException(productName, e);
}
}
return info;
}
static String composeMessage(String title, String version, String key, CvalInfo info) {
String msg = "";
int majorVers = computeMajorVersion(version);
if (info != null && !info.isValidVersion(majorVers)) {
msg = getErrorMessage("invalid", title, majorVers);
} else if (info != null && info.getMessage() != null) {
msg = info.getMessage().replace("\\n", "\n");
} else if (info != null && info.isLicenseExpired()) {
String type = "evaluation".equals(info.getType()) ? "Evaluation license" : "License";
msg = getErrorMessage("expired", title, majorVers, type);
} else if (key == null) {
msg = getErrorMessage("none", title, majorVers);
} else {
msg = getErrorMessage("invalid", title, majorVers);
}
return msg;
}
/**
* Validate whether there is a valid license key for a product.
*
* @param productName for example vaadin-touchkit
* @param productVersion for instance 4.0.1
* @return CvalInfo Server response or cache response if server is offline
* @throws InvalidCvalException when there is no a valid license for the product
* @throws UnreachableCvalServerException when we have license key but server is unreachable
*/
public CvalInfo validateProduct(String productName, String productVersion, String productTitle)
throws InvalidCvalException, UnreachableCvalServerException {
String key = getDeveloperLicenseKey(productName, productVersion, productTitle);
CvalInfo info = null;
if (key != null && !key.isEmpty()) {
info = getCachedLicenseInfo(productName);
if (info != null && !info.isValidInfo(productName, key)) {
deleteCache(productName);
info = null;
}
info = askLicenseServer(productName, key, productVersion, info);
if (info != null
&& info.isValidInfo(productName, key)
&& info.isValidVersion(computeMajorVersion(productVersion))
&& !info.isLicenseExpired()) {
return info;
}
}
throw new InvalidCvalException(productName, productVersion, productTitle, key, info);
}