| /** |
| * 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 org.apache.camel.component.http.helper; |
| |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.RuntimeCamelException; |
| import org.apache.camel.component.http.HttpEndpoint; |
| import org.apache.camel.component.http.HttpMethods; |
| |
| /** |
| * Helper methods for HTTP producers. |
| * |
| * @version $Revision$ |
| */ |
| public final class HttpProducerHelper { |
| |
| private HttpProducerHelper() { |
| } |
| |
| /** |
| * Creates the URL to invoke. |
| * |
| * @param exchange the exchange |
| * @param endpoint the endpoint |
| * @return the URL to invoke |
| */ |
| public static String createURL(Exchange exchange, HttpEndpoint endpoint) { |
| String uri = null; |
| if (!(endpoint.isBridgeEndpoint())) { |
| uri = exchange.getIn().getHeader(Exchange.HTTP_URI, String.class); |
| } |
| if (uri == null) { |
| uri = endpoint.getHttpUri().toString(); |
| } |
| |
| // append HTTP_PATH to HTTP_URI if it is provided in the header |
| String path = exchange.getIn().getHeader(Exchange.HTTP_PATH, String.class); |
| if (path != null) { |
| if (path.startsWith("/")) { |
| URI baseURI; |
| String baseURIString = exchange.getIn().getHeader(Exchange.HTTP_BASE_URI, String.class); |
| try { |
| if (baseURIString == null) { |
| if (exchange.getFromEndpoint() != null) { |
| baseURIString = exchange.getFromEndpoint().getEndpointUri(); |
| } else { |
| // will set a default one for it |
| baseURIString = "/"; |
| } |
| } |
| baseURI = new URI(baseURIString); |
| String basePath = baseURI.getPath(); |
| if (path.startsWith(basePath)) { |
| path = path.substring(basePath.length()); |
| if (path.startsWith("/")) { |
| path = path.substring(1); |
| } |
| } else { |
| throw new RuntimeCamelException("Cannot analyze the Exchange.HTTP_PATH header, due to: cannot find the right HTTP_BASE_URI"); |
| } |
| } catch (Throwable t) { |
| throw new RuntimeCamelException("Cannot analyze the Exchange.HTTP_PATH header, due to: " |
| + t.getMessage(), t); |
| } |
| |
| } |
| if (path.length() > 0) { |
| // make sure that there is exactly one "/" between HTTP_URI and |
| // HTTP_PATH |
| if (!uri.endsWith("/")) { |
| uri = uri + "/"; |
| } |
| uri = uri.concat(path); |
| } |
| } |
| |
| return uri; |
| } |
| |
| /** |
| * Creates the HttpMethod to use to call the remote server, often either its GET or POST. |
| * |
| * @param exchange the exchange |
| * @return the created method |
| */ |
| public static HttpMethods createMethod(Exchange exchange, HttpEndpoint endpoint, boolean hasPayload) { |
| // is a query string provided in the endpoint URI or in a header (header |
| // overrules endpoint) |
| String queryString = exchange.getIn().getHeader(Exchange.HTTP_QUERY, String.class); |
| if (queryString == null) { |
| queryString = endpoint.getHttpUri().getQuery(); |
| } |
| |
| // compute what method to use either GET or POST |
| HttpMethods answer; |
| HttpMethods m = exchange.getIn().getHeader(Exchange.HTTP_METHOD, HttpMethods.class); |
| if (m != null) { |
| // always use what end-user provides in a header |
| answer = m; |
| } else if (queryString != null) { |
| // if a query string is provided then use GET |
| answer = HttpMethods.GET; |
| } else { |
| // fallback to POST if we have payload, otherwise GET |
| answer = hasPayload ? HttpMethods.POST : HttpMethods.GET; |
| } |
| |
| return answer; |
| } |
| |
| } |