| // |
| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| // |
| |
| package com.cloud.network.nicira; |
| |
| import java.io.IOException; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| |
| import org.apache.http.HttpEntity; |
| import org.apache.http.StatusLine; |
| import org.apache.http.client.methods.CloseableHttpResponse; |
| import org.apache.http.client.methods.HttpUriRequest; |
| import org.apache.http.client.protocol.HttpClientContext; |
| import org.apache.http.impl.client.CloseableHttpClient; |
| import org.apache.http.util.EntityUtils; |
| |
| import com.cloud.utils.rest.BasicRestClient; |
| import com.cloud.utils.rest.CloudstackRESTException; |
| import com.cloud.utils.rest.HttpConstants; |
| import com.cloud.utils.rest.HttpMethods; |
| import com.cloud.utils.rest.HttpStatusCodeHelper; |
| import com.cloud.utils.rest.HttpUriRequestBuilder; |
| |
| public class NiciraRestClient extends BasicRestClient { |
| |
| |
| private static final String CONTENT_TYPE = HttpConstants.CONTENT_TYPE; |
| private static final String TEXT_HTML_CONTENT_TYPE = HttpConstants.TEXT_HTML_CONTENT_TYPE; |
| |
| private static final int DEFAULT_BODY_RESP_MAX_LEN = 1024; |
| private static final int DEFAULT_EXECUTION_LIMIT = 5; |
| |
| private final ExecutionCounter counter; |
| private final int maxResponseErrorMesageLength; |
| private final int executionLimit; |
| |
| private final String username; |
| private final String password; |
| private final String loginUrl; |
| |
| private NiciraRestClient(final Builder builder) { |
| super(builder.client, builder.clientContext, builder.hostname); |
| executionLimit = builder.executionLimit; |
| counter = new ExecutionCounter(executionLimit); |
| maxResponseErrorMesageLength = builder.maxResponseErrorMesageLength; |
| username = builder.username; |
| password = builder.password; |
| loginUrl = builder.loginUrl; |
| } |
| |
| public static Builder create() { |
| return new Builder(); |
| } |
| |
| @Override |
| public CloseableHttpResponse execute(final HttpUriRequest request) throws CloudstackRESTException { |
| return execute(request, 0); |
| } |
| |
| CloseableHttpResponse execute(final HttpUriRequest request, final int previousStatusCode) throws CloudstackRESTException { |
| if (counter.hasReachedExecutionLimit()) { |
| throw new CloudstackRESTException("Reached max executions limit of " + executionLimit); |
| } |
| counter.incrementExecutionCounter(); |
| logger.debug("Executing " + request.getMethod() + " request [execution count = " + counter.getValue() + "]"); |
| final CloseableHttpResponse response = super.execute(request); |
| |
| final StatusLine statusLine = response.getStatusLine(); |
| final int statusCode = statusLine.getStatusCode(); |
| logger.debug("Status of last request: " + statusLine.toString()); |
| if (HttpStatusCodeHelper.isUnauthorized(statusCode)) { |
| return handleUnauthorizedResponse(request, previousStatusCode, response, statusCode); |
| } else if (HttpStatusCodeHelper.isSuccess(statusCode)) { |
| return handleSuccessResponse(request, response); |
| } else if (HttpStatusCodeHelper.isConflict(statusCode)) { |
| throw new CloudstackRESTException("Conflict: " + statusLine.getReasonPhrase(), statusCode); |
| } else { |
| throw new CloudstackRESTException("Unexpected status code: " + statusCode, statusCode); |
| } |
| } |
| |
| private CloseableHttpResponse handleUnauthorizedResponse(final HttpUriRequest request, final int previousStatusCode, final CloseableHttpResponse response, final int statusCode) |
| throws CloudstackRESTException { |
| super.closeResponse(response); |
| if (HttpStatusCodeHelper.isUnauthorized(previousStatusCode)) { |
| logger.error(responseToErrorMessage(response)); |
| throw new CloudstackRESTException("Two consecutive failed attempts to authenticate against REST server"); |
| } |
| final HttpUriRequest authenticateRequest = createAuthenticationRequest(); |
| final CloseableHttpResponse loginResponse = execute(authenticateRequest, statusCode); |
| final int loginStatusCode = loginResponse.getStatusLine().getStatusCode(); |
| super.closeResponse(loginResponse); |
| return execute(request, loginStatusCode); |
| } |
| |
| private CloseableHttpResponse handleSuccessResponse(final HttpUriRequest request, final CloseableHttpResponse response) { |
| if (!request.getURI().getPath().contains(loginUrl)) { |
| counter.resetExecutionCounter(); |
| } |
| return response; |
| } |
| |
| private HttpUriRequest createAuthenticationRequest() { |
| final Map<String, String> parameters = new LinkedHashMap<>(); |
| parameters.put("username", username); |
| parameters.put("password", password); |
| return HttpUriRequestBuilder.create() |
| .method(HttpMethods.POST) |
| .methodParameters(parameters) |
| .path(loginUrl) |
| .build(); |
| } |
| |
| private String responseToErrorMessage(final CloseableHttpResponse response) { |
| String errorMessage = response.getStatusLine().toString(); |
| if (response.containsHeader(CONTENT_TYPE) && TEXT_HTML_CONTENT_TYPE.equals(response.getFirstHeader(CONTENT_TYPE).getValue())) { |
| try { |
| final HttpEntity entity = response.getEntity(); |
| final String respobnseBody = EntityUtils.toString(entity); |
| errorMessage = respobnseBody.subSequence(0, maxResponseErrorMesageLength).toString(); |
| } catch (final IOException e) { |
| logger.debug("Could not read response body. Response: " + response, e); |
| } |
| } |
| |
| return errorMessage; |
| } |
| |
| protected static class Builder extends BasicRestClient.Builder<Builder> { |
| private CloseableHttpClient client; |
| private HttpClientContext clientContext; |
| private String hostname; |
| private String username; |
| private String password; |
| private String loginUrl; |
| private int executionLimit = DEFAULT_EXECUTION_LIMIT; |
| private int maxResponseErrorMesageLength = DEFAULT_BODY_RESP_MAX_LEN; |
| |
| public Builder hostname(final String hostname) { |
| this.hostname = hostname; |
| return this; |
| } |
| |
| public Builder username(final String username) { |
| this.username = username; |
| return this; |
| } |
| |
| public Builder password(final String password) { |
| this.password = password; |
| return this; |
| } |
| |
| public Builder loginUrl(final String loginUrl) { |
| this.loginUrl = loginUrl; |
| return this; |
| } |
| |
| @Override |
| public Builder client(final CloseableHttpClient client) { |
| this.client = client; |
| return this; |
| } |
| |
| @Override |
| public Builder clientContext(final HttpClientContext clientContext) { |
| this.clientContext = clientContext; |
| return this; |
| } |
| |
| public Builder executionLimit(final int executionLimit) { |
| this.executionLimit = executionLimit; |
| return this; |
| } |
| |
| public Builder maxResponseErrorMesageLength(final int maxResponseErrorMesageLength) { |
| this.maxResponseErrorMesageLength = maxResponseErrorMesageLength; |
| return this; |
| } |
| |
| @Override |
| public NiciraRestClient build() { |
| return new NiciraRestClient(this); |
| } |
| |
| } |
| } |