当 Rest Request URI 太长时，通过 apache Camel 的 GET HTTP 操作失败答案

【问题标题】：GET HTTP operation via apache Camel fails when Rest Request URI too long当 Rest Request URI 太长时，通过 apache Camel 的 GET HTTP 操作失败
【发布时间】：2017-02-28 09:41:57
【问题描述】：

我在我的项目中使用 apache rest CXF 和骆驼。有很多情况下，请求 URI 的长度太长，并且在一定长度之后，尽管 HTTP 操作失败异常，如下所示与

statusCode: 400 
        at org.apache.camel.component.http.HttpProducer.populateHttpOperationFailedException(HttpProducer.java:230) ~[camel-http-2.13.1.jar:2.13.1] 
        at org.apache.camel.component.http.HttpProducer.process(HttpProducer.java:156) ~[camel-http-2.13.1.jar:2.13.1] 
        at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:113) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:72) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:398) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.Pipeline.process(Pipeline.java:118) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.Pipeline.process(Pipeline.java:80) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.ChoiceProcessor.process(ChoiceProcessor.java:111) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:72) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:398) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191) ~[camel-core-2.13.1.jar:2.13.1]l 
        at org.apache.camel.processor.ChoiceProcessor.process(ChoiceProcessor.java:111) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:72) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:398) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.Pipeline.process(Pipeline.java:118) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.Pipeline.process(Pipeline.java:80) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:191) ~[camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.component.seda.SedaConsumer.sendToConsumers(SedaConsumer.java:291) [camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.component.seda.SedaConsumer.doRun(SedaConsumer.java:200) [camel-core-2.13.1.jar:2.13.1] 
        at org.apache.camel.component.seda.SedaConsumer.run(SedaConsumer.java:147) [camel-core-2.13.1.jar:2.13.1] 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101] 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101] 
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]

那么有什么办法，我们可以在发送请求之前在标头中显式传递长度参数或任何其他配置来设置请求 URI 的最大长度。对于解决方法，我只是用 HttpConnection 替换了骆驼调用，它工作正常，这意味着骆驼对请求的 URI 长度有一些限制。

我将请求发送到link

骆驼码：

.choice()
                .when(header(ReservationConstant.CALL_ENDECA_FOR_LAR_FACETS).isEqualTo(Boolean.TRUE))
                .setHeader(Exchange.HTTP_METHOD, constant(org.apache.camel.component.http4.HttpMethods.GET))
                .setHeader(Exchange.HTTP_PATH, constant(ReservationConstant.ENDECA_GUIDED_SEARCH_SERVICE))
                .setBody(simple(StringUtils.EMPTY))
                //.to("cxfrs:bean:endecaLocationKeyRSClient?throwExceptionOnFailure=false")
                .to("{{service.endeca.location.dimension.rest}}")
                //.process(endecaFacetProcessor)
                .bean(EndecaResponseBuilder.class, "getEndecaResponseForLARFacets")
                .end()

【问题讨论】：

请分享您的代码和解决问题的 URI，以便更轻松地提供帮助。
我已经在描述中添加了详细信息。请注意上述请求通过邮递员或浏览器成功运行。
您是否在服务器端检查过 Camel 以某种方式截断了 url？
@SoucianceEqdamRashti 我刚刚验证过，在 HttpConnection 类的 this.outputStream.write(data, offset, length) 行的 bufferedOutPutstream 上写入请求时出现问题。其中输出流的默认大小为 2048，数据长度为 4398。Camel 在内部使用 Apache HttpClient 进行调用。有什么办法，我可以覆盖这个 OutPutStream 对象的大小

标签： java apache rest apache-camel cxf

【解决方案1】：

问题似乎不是因为 URI 太长，而是因为我在请求中的一个标头在我删除该标头后它开始工作后太大了

【讨论】：