Apache Camel：调用HttpComponent后如何从Exchange获取HttpRequest与HttpResponse

获取HttpRequest #

调用HttpComponent前后，可通过两种方式获取HttpRequest：

• 从Exchange属性中直接提取，使用Exchange.HTTP_REQUEST作为key，返回类型为org.apache.http.client.methods.HttpUriRequest
• 将Exchange的In消息转换为org.apache.camel.component.http.HttpMessage，调用其getHttpRequest()方法

获取HttpResponse #

调用HttpComponent完成后，HttpResponse可通过以下方式获取：

• 从Exchange属性中提取，使用Exchange.HTTP_RESPONSE作为key，返回类型为org.apache.http.HttpResponse
• 将In消息转换为HttpMessage后，调用getHttpResponse()方法

代码示例 #

from("direct:restendpoint").routeId("direct_restendpoint")
    .to("https://<URL_SERVICE>")
    .process(exchange -> {
        String responseCode = exchange.getIn().getHeader("CamelHttpResponseCode").toString();
        
        // 获取HttpRequest
        org.apache.http.client.methods.HttpUriRequest httpRequest = 
            exchange.getProperty(Exchange.HTTP_REQUEST, org.apache.http.client.methods.HttpUriRequest.class);
        
        // 或者通过HttpMessage获取HttpRequest
        // org.apache.camel.component.http.HttpMessage httpMessage = 
        //     exchange.getIn(org.apache.camel.component.http.HttpMessage.class);
        // org.apache.http.client.methods.HttpUriRequest httpRequest = httpMessage.getHttpRequest();
        
        // 获取HttpResponse
        org.apache.http.HttpResponse httpResponse = 
            exchange.getProperty(Exchange.HTTP_RESPONSE, org.apache.http.HttpResponse.class);
        
        // 或者通过HttpMessage获取HttpResponse
        // org.apache.http.HttpResponse httpResponse = httpMessage.getHttpResponse();
        
        // 后续操作示例：获取请求URL、响应头
        String requestUrl = httpRequest.getURI().toString();
        org.apache.http.Header[] responseHeaders = httpResponse.getAllHeaders();
    });

注意事项 #

• 需确保引入Apache HttpComponents和Camel HttpComponent的相关依赖
• 若使用Camel的ahc异步HttpClient组件，对应的请求/响应类型为AsyncHttpClientRequest和AsyncHttpClientResponse，需调整获取方式

内容的提问来源于stack exchange，提问作者stewchicken