curl error 18 transfer closed with outstanding read data remaining - bash

Question

Setup
I'm Using curl in the following bash script to push a JSON file to a REST API running in tomcat sitting behind nginx.
while IFS= read -d '' -r file; do
base=$(basename "$file")
datetime=$(find $file -maxdepth 0 -printf "%TY/%Tm/%Td %TH:%TM:%.2TS")
curl -vX POST -H "Content-Type: application/json" -H "Cache-Control: no-cache" \
-d #"$file" -u vangeeij:eian12 \
"http://192.168.105.10/homeaccess/services/aCStats/uploadData?username=vangeeij&filename=$base&datetime=$datetime"
#sudo mv "$file" /home/vangeeij/acserver/resultsOld
done < <(sudo find . -type f -print0)
Problem
When running this script I get a http 400 response with curl error:
curl: (18) transfer closed with outstanding read data remaining
What I have tried
I have found 2 things. First running the same URL and body through Postman yields a successful POST.
I found that this error goes away when the last parameter is removed from the URL &datetime=$datetime
I have also found a few connections between this error and setting a curl option something like
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Expect:'));
But I'm not sure where/how to set this exactly when using curl in a simple bash script
Question
What do I need to change in my curl command to get rid of the error and still be able to use all parameters?
UPDATE
Starting a new question, as further investigation has lead me to a better understanding of the problem.
New Question Link
The error has to do with the fact that the parameter datetime= ends up with text in it that needs to be URL encoded.
This was confirmed by replacing the variable with 2017%2F03%2F01%2008%3A50%3A56
and it worked.
So now the problem is, that I can't get --data-urlencode datetime=$datetime to work. It seems this just gets appended to the JSON data or something.

Answer 1

This error is being generated by the fact that the datetime= paramater is being passed in with non encoded non URL friendly characters... (eg. space).
The fix to this would be to find a way to convert the $datetime to a URLEncoded String.
eg. convert:
2017/03/01 08:50:56
TO
2017%2F03%2F01%2008%3A50%3A56
See the following discussion for one method to accomplish this.
Post JSON data to Rest with URLEncoded query paramaters