| /** |
| * 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.http4.helper; |
| |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.RuntimeExchangeException; |
| import org.apache.camel.component.http4.HttpEndpoint; |
| import org.apache.camel.component.http4.HttpMethods; |
| import org.apache.camel.util.UnsafeUriCharactersEncoder; |
| |
| public final class HttpMethodHelper { |
| |
| private HttpMethodHelper() { |
| // Helper class |
| } |
| |
| /** |
| * Creates the HttpMethod to use to call the remote server, often either its GET or POST. |
| */ |
| public static HttpMethods createMethod(Exchange exchange, HttpEndpoint endpoint) throws URISyntaxException { |
| // 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); |
| // We need also check the HTTP_URI header query part |
| String uriString = exchange.getIn().getHeader(Exchange.HTTP_URI, String.class); |
| // resolve placeholders in uriString |
| try { |
| uriString = exchange.getContext().resolvePropertyPlaceholders(uriString); |
| } catch (Exception e) { |
| throw new RuntimeExchangeException("Cannot resolve property placeholders with uri: " + uriString, exchange, e); |
| } |
| if (uriString != null) { |
| // in case the URI string contains unsafe characters |
| uriString = UnsafeUriCharactersEncoder.encodeHttpURI(uriString); |
| URI uri = new URI(uriString); |
| queryString = uri.getQuery(); |
| } |
| if (queryString == null) { |
| queryString = endpoint.getHttpUri().getRawQuery(); |
| } |
| |
| // compute what method to use either GET or POST |
| HttpMethods answer; |
| if (endpoint.getHttpMethod() != null) { |
| // endpoint configured take precedence |
| answer = HttpMethods.valueOf(endpoint.getHttpMethod().name()); |
| } else { |
| // compute what method to use either GET or POST (header take precedence) |
| 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 = exchange.getMessage().getBody() != null ? HttpMethods.POST : HttpMethods.GET; |
| } |
| } |
| |
| return answer; |
| } |
| |
| } |