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https://issues.apache.org/jira/browse/CAMEL-24234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18097956#comment-18097956
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John Yin commented on CAMEL-24234:
----------------------------------
Please note this happened when
org.apache.camel.springboot:camel-platform-http-starter is used.
> camel-http throws ZipException: Not in GZIP format against any
> gzip-compressing server with default settings
> ------------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-24234
> URL: https://issues.apache.org/jira/browse/CAMEL-24234
> Project: Camel
> Issue Type: Bug
> Components: camel-http
> Affects Versions: 4.18.3
> Environment: * {*}Environment{*}: Camel 4.18.3, {{camel-http}}
> (HttpClient 5 backend), Java 25 (in Spring Boot 3.5.16)
> Reporter: John Yin
> Priority: Major
>
> * {*}Steps to reproduce{*}: minimal route {{.to("https://www.google.com";)}}
> with no special config
> * {*}Expected{*}: response is returned successfully (compression should be
> transparent by default)
> * {*}Actual{*}:
> java.util.zip.ZipException: Not in GZIP format
> at
> java.base/java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:231)
> at java.base/java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:86)
> at java.base/java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:118)
> at org.apache.camel.support.GZIPHelper.uncompressGzip(GZIPHelper.java:41)
> at
> org.apache.camel.component.http.HttpProducer.extractResponseBody(HttpProducer.java:543)
> at
> org.apache.camel.component.http.HttpProducer.populateResponse(HttpProducer.java:363)
> at
> org.apache.camel.component.http.HttpProducer.lambda$process$1(HttpProducer.java:277)
> at
> org.apache.camel.component.http.HttpProducer.executeMethod(HttpProducer.java:500)
> at org.apache.camel.component.http.HttpProducer.process(HttpProducer.java:253)
> at
> org.apache.camel.support.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:65)
> at
> org.apache.camel.processor.SendProcessor.sendUsingProducer(SendProcessor.java:253)
> at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:158)
> at
> org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$RedeliveryTask.doRun(RedeliveryErrorHandler.java:1105)
> at
> org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$RedeliveryTask.run(RedeliveryErrorHandler.java:1048)
> at
> org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.doRun(DefaultReactiveExecutor.java:199)
> at
> org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.executeReactiveWork(DefaultReactiveExecutor.java:189)
> at
> org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.tryExecuteReactiveWork(DefaultReactiveExecutor.java:166)
> at
> org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:148)
> at
> org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:59)
> at org.apache.camel.processor.Pipeline.process(Pipeline.java:162)
> at
> org.apache.camel.impl.engine.CamelInternalProcessor.processNonTransacted(CamelInternalProcessor.java:385)
> at
> org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:361)
> at
> org.apache.camel.component.timer.TimerConsumer.sendTimerExchange(TimerConsumer.java:293)
> at
> org.apache.camel.component.timer.TimerConsumer$1.doRun(TimerConsumer.java:164)
> at
> org.apache.camel.component.timer.TimerConsumer$1.run(TimerConsumer.java:136)
> at java.base/java.util.TimerThread.mainLoop(Timer.java:579)
> at java.base/java.util.TimerThread.run(Timer.java:529).
> * *Root cause* (worth including — reviewers move faster on well-diagnosed
> reports): HttpClient5 auto-decompresses by default but leaves the
> {{Content-Encoding: gzip}} response header in place; {{HttpProducer}} doesn't
> check whether decompression already happened before re-attempting it via
> {{GZIPHelper}}
> * {*}Workaround found{*}: {{contentCompressionDisabled=true}} on the
> component avoids the double-decompression, but this isn't documented as a
> _required_ setting anywhere, and it's non-obvious that leaving compression at
> its default is what breaks things
> * {*}Suggested fix direction{*}: either (a) {{HttpProducer}} should check
> whether the entity was already decompressed by HttpClient5 before invoking
> {{{}GZIPHelper{}}}, or (b) the component docs should clearly state that
> {{contentCompressionDisabled=true}} is effectively required for correct
> behavior against compressing servers, or (c) default
> {{contentCompressionDisabled}} to {{true}} so Camel's own handling is the
> sole decompression path
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