"We're sorry, but the value for field labels was not valid" while posting a blog post on blogger using API

I have a process that aggregate blog post into a new aggregated blog, part of the process I copy part of the content and all the tags.

Every now and than I faced a problem to post an item into the aggregated blog with a very generic error, the response was:

	{
	"code" : 400,
	"errors" : [ {
	"domain" : "global",
	"message" : "We're sorry, but the value for field labels was not valid.",
	"reason" : "invalid"
	} ],
	"message" : "We're sorry, but the value for field labels was not valid."
	}

view raw blog-post-error.json hosted with ❤ by GitHub

Well apparently the size of the labels (tags) must be below 200.

I just scratched a simple routine that will ensure combined labels length will be below 200, making sure i don't cut label in the middle

Hope this saves you some time