Add more headers in platform-http multipart uploads

[Croway]

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[github-actions]

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[davsclaus]

I think there is somewhere you need to document this header, try look for some of the other headers.

[davsclaus]

Also put it up to A headers so its sorted

[davsclaus]

Ah yeah add it to ExchangePropertyKey also and doc via @Metadata

[Croway]

mmm, I cannot find much documentation for other headers, should I annotate it with Metadata and add a description?

[davsclaus]

Yes

[Croway]

https://github.com/apache/camel/pull/17070/files#diff-c4832886119fc6dd6a4a54e68c5e2740ea9ae86b8699a469648284189d51e839 like this? I do not fully understand how ExchangePropertyKey works, for example, FILE* related headers are not there.

[davsclaus]

Its the most commonly used headers - and since HTTP with attachments is fairly common then IMHO it would be okay to add here

[jamesnetherton]

Nitpick

Suggested change

	** The file's content type in the "CamelFileContentType" message header
	** The file's size in the "CamelFileLength" message header
	** The file content type in the "CamelFileContentType" message header
	** The file size in the "CamelFileLength" message header

[davsclaus]

the size header should likely only be set if its > 0, as then it may be always there, also for just plain REST GET etc

[Croway]

the size header should likely only be set if its > 0, as then it may be always there, also for just plain REST GET etc

The ATTACHMENTS_SIZE header is added only during a multipart request. But I do not fully understand your comment.

[davsclaus]

ah okay there was a if multipart check first - so this is fine. Just make sure on CSB that its also only added if really multipart data so its not there for anything else

[Croway]

ah okay there was a if multipart check first - so this is fine. Just make sure on CSB that its also only added if really multipart data so its not there for anything else

yup, same for CSB, all the logic is wrapped by https://github.com/apache/camel-spring-boot/blob/b358ea9050c281f550f7fc2cee12c055c5413371/components-starter/camel-platform-http-starter/src/main/java/org/apache/camel/component/platform/http/springboot/SpringBootPlatformHttpBinding.java#L98