Assign variable and redirect in bash - bash

Question

I'm doing ad-hoc profiling on a web service that seems to maintain some state and get slower and slower until eventually things start timing out. I have a simple script that will expose this behavior:
while true
do
RESPONSE_CODE=$( curl --config curl.config )
if [ "$RESPONSE_CODE" -eq "200" ]; then
echo SUCCESS
else
echo FAILURE
fi
done
Along with some headers, cookies, post data, url, etc. curl.config in particular has the lines:
silent
output = /dev/null
write-out = "%{http_code}"
So the only output from curl should be the HTTP status code.
This works fine. What I'd like to do is something like this:
{ time -p RESPONSE_CODE=$(curl --config curl.config) ; } 2>&1 | awk '/real/{print $2;}'
to get a running printout of how long these queries actually take, while still saving curl's output for use in my test. But that doesn't work.
How can I capture the http status from curl AND grab the output of time so I can process both?

Answer 1

As written:
RESPONSE_CODE = $( curl --config curl.config )
you have spaces around the assignment which simply does not work in shell (it tries to execute a command RESPONSE_CODE with = as the first argument, etc. You need:
RESPONSE_CODE=$( curl --config curl.config )
The time built-in is hard to redirect. Since you need both HTTP status and real time, you will have to do something to capture both values. One possibility is:
set -- $( (time -p -- curl --config curl.config ) 2>&1 |
awk '/real/{print $2} /^[0-9]+$/{print}')
which will set $1 and $2. Another is array assignment:
data=( $( (time -p -- curl --config curl.config ) 2>&1 |
awk '/real/{print $2} /^[0-9]+$/{print}') )
The HTTP response code should appear before the time.
(Tested using sh -c 'echo 200; sleep 1' in lieu of curl --config curl.config.)

Answer 2

This should work if Curl's response is only a single line:
#!/bin/bash
RESPONSE_CODE=''
TIME=''
while read -r TYPE DATA; do
case "$TYPE" in
curl)
RESPONSE_CODE=$DATA
;;
real)
TIME=$DATA
;;
esac
done < <(exec 2>&1; time -p R=$(curl --config curl.config); echo "curl $R")
Or use an associative array:
#!/bin/bash
declare -A RESPONSE
while read -r TYPE DATA; do
RESPONSE[$TYPE]=$DATA
done < <(exec 2>&1; time -p R=$(curl ...); echo "code $R")
echo "${RESPONSE[code] ${RESPONSE[real]}"