use of io.apiman.gateway.engine.beans.exceptions.InvalidApiException in project apiman by apiman.
the class ApiRequestExecutorImpl method execute.
/**
* @see io.apiman.gateway.engine.IApiRequestExecutor#execute()
*/
@Override
public void execute() {
// load the api data based on request
registry.getApi(request.getApiOrgId(), request.getApiId(), request.getApiVersion(), (IAsyncResult<Api> apiResult) -> {
if (apiResult.isSuccess()) {
api = apiResult.getResult();
} else if (apiResult.isError()) {
resultHandler.handle(AsyncResultImpl.create(apiResult.getError(), IEngineResult.class));
}
});
// check if api disable key are enabled
if (api != null && !api.isKeysStrippingDisabled()) {
// Strip apikey
stripApiKey();
}
// Fill out some of the basic metrics structure.
requestMetric.setRequestStart(new Date());
requestMetric.setUrl(request.getUrl());
requestMetric.setResource(request.getDestination());
requestMetric.setMethod(request.getType());
requestMetric.setApiOrgId(request.getApiOrgId());
requestMetric.setApiId(request.getApiId());
requestMetric.setApiVersion(request.getApiVersion());
// Set request metric
context.setAttribute(PolicyContextKeys.REQUEST_METRIC, requestMetric);
// Set connector config early (allows mutation of certain connector properties)
IConnectorConfig connectorConfig = connectorFactory.createConnectorConfig(request, api);
context.setConnectorConfiguration(connectorConfig);
// Create the handler that will be called once the policies are asynchronously
// loaded (can happen this way due to the plugin framework).
final IAsyncHandler<List<PolicyWithConfiguration>> policiesLoadedHandler = (List<PolicyWithConfiguration> result) -> {
policyImpls = result;
// Set up the policy chain request, call #doApply to execute.
requestChain = createRequestChain((ApiRequest req) -> {
IConnectorInterceptor connectorInterceptor = context.getConnectorInterceptor();
IApiConnector connector;
if (connectorInterceptor == null) {
connector = connectorFactory.createConnector(req, api, RequiredAuthType.parseType(api), hasDataPolicy, connectorConfig);
} else {
connector = connectorInterceptor.createConnector();
}
// TODO check for a null connector
// Open up a connection to the back-end if we're given the OK from the request chain
requestMetric.setApiStart(new Date());
// Attach the response handler here.
apiConnection = connector.connect(req, createApiConnectionResponseHandler());
// Write the body chunks from the *policy request* into the connector request.
requestChain.bodyHandler(buffer -> {
requestMetric.setBytesUploaded(requestMetric.getBytesUploaded() + buffer.length());
apiConnection.write(buffer);
});
// Indicate end from policy chain request to connector request.
requestChain.endHandler(onEnd -> apiConnection.end());
// Once we have returned from connector.request, we know it is safe to start
// writing chunks without buffering. At this point, it is the responsibility
// of the implementation as to how they should cope with the chunks.
handleStream();
});
requestChain.doApply(request);
};
// The handler used when we need to parse the inbound request payload into
// an object and make it available via the policy context.
final IAsyncResultHandler<Object> payloadParserHandler = new IAsyncResultHandler<Object>() {
@Override
public void handle(IAsyncResult<Object> result) {
if (result.isSuccess()) {
final Object payload = result.getResult();
// Store the parsed object in the policy context.
context.setAttribute(PolicyContextKeys.REQUEST_PAYLOAD, payload);
context.setAttribute(PolicyContextKeys.REQUEST_PAYLOAD_IO, payloadIO);
// Now replace the inbound stream handler with one that uses the payload IO
// object to re-marshall the (possibly modified) payload object to bytes
// and sends that (because the *real* inbound stream has already been consumed)
streamHandler(new IAsyncHandler<ISignalWriteStream>() {
@Override
public void handle(ISignalWriteStream connectorStream) {
try {
if (payload == null) {
connectorStream.end();
} else {
payloadIO = context.getAttribute(PolicyContextKeys.REQUEST_PAYLOAD_IO, payloadIO);
byte[] data = payloadIO.marshall(payload);
IApimanBuffer buffer = bufferFactory.createBuffer(data);
connectorStream.write(buffer);
connectorStream.end();
}
} catch (Exception e) {
connectorStream.abort(e);
throw new RuntimeException(e);
}
}
});
// Load and executes the policies
loadPolicies(policiesLoadedHandler);
} else {
resultHandler.handle(AsyncResultImpl.create(result.getError(), IEngineResult.class));
}
}
};
// then we lookup the Contract and use that.
if (request.getApiKey() == null || (api != null && api.isKeysStrippingDisabled())) {
if (api == null) {
// $NON-NLS-1$
ApiNotFoundException error = new ApiNotFoundException(Messages.i18n.format("EngineImpl.ApiNotFound"));
resultHandler.handle(AsyncResultImpl.create(error, IEngineResult.class));
} else if (!api.isPublicAPI()) {
// $NON-NLS-1$
InvalidApiException error = new InvalidApiException(Messages.i18n.format("EngineImpl.ApiNotPublic"));
// Forbidden
error.setStatusCode(403);
resultHandler.handle(AsyncResultImpl.create(error, IEngineResult.class));
} else {
resolvePropertyReplacements(api);
request.setApi(api);
policies = api.getApiPolicies();
policyImpls = new ArrayList<>(policies.size());
// or a JSON document
if (api.isParsePayload()) {
parsePayload(payloadParserHandler);
} else {
loadPolicies(policiesLoadedHandler);
}
}
} else {
String apiOrgId = request.getApiOrgId();
String apiId = request.getApiId();
String apiVersion = request.getApiVersion();
String apiKey = request.getApiKey();
registry.getContract(apiOrgId, apiId, apiVersion, apiKey, (IAsyncResult<ApiContract> contractResult) -> {
if (contractResult.isSuccess()) {
ApiContract apiContract = contractResult.getResult();
resolvePropertyReplacements(apiContract);
requestMetric.setClientOrgId(apiContract.getClient().getOrganizationId());
requestMetric.setClientId(apiContract.getClient().getClientId());
requestMetric.setClientVersion(apiContract.getClient().getVersion());
requestMetric.setPlanId(apiContract.getPlan());
requestMetric.setContractId(request.getApiKey());
api = apiContract.getApi();
request.setContract(apiContract);
request.setApi(api);
policies = apiContract.getPolicies();
policyImpls = new ArrayList<>(policies.size());
if (request.getApiOrgId() != null) {
try {
validateRequest(request);
} catch (InvalidContractException e) {
resultHandler.handle(AsyncResultImpl.create(e, IEngineResult.class));
return;
}
}
// or a JSON document
if (api.isParsePayload()) {
parsePayload(payloadParserHandler);
} else {
// Load and executes the policies
loadPolicies(policiesLoadedHandler);
}
} else {
resultHandler.handle(AsyncResultImpl.create(contractResult.getError(), IEngineResult.class));
}
});
}
}
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