How to check if curl was successful and print a message? - bash

Question

I am trying to do a CURL with an IF Else condition. On success of the call Print a successful message or else Print the call failed.
My Sample Curl would look like:
curl 'https://xxxx:1234xxxx#abc.dfghj.com/xl_template.get_web_query?id=1035066' > HTML_Output.html
I want to do the same thing using Shell.
Using JavaScript:
if(res.status === 200){console.log("Yes!! The request was successful")}
else {console.log("CURL Failed")}
Also, I see the CURL percentage, but I do not know, how to check the percentage of CURL. Please help.
CURL output

Answer 1

You can use the -w (--write-out) option of curl to print the HTTP code:
curl -s -w '%{http_code}\n' 'https://xxxx:1234xxxx#abc.dfghj.com/xl_template.get_web_query?id=1035066'
It will show the HTTP code the site returns.
Also curl provides a whole bunch of exit codes for various scenarios, check man curl.

Answer 2

One way of achieving this like,
HTTPS_URL="https://xxxx:1234xxxx#abc.dfghj.com/xl_template.get_web_query?id=1035066"
CURL_CMD="curl -w httpcode=%{http_code}"
# -m, --max-time <seconds> FOR curl operation
CURL_MAX_CONNECTION_TIMEOUT="-m 100"
# perform curl operation
CURL_RETURN_CODE=0
CURL_OUTPUT=`${CURL_CMD} ${CURL_MAX_CONNECTION_TIMEOUT} ${HTTPS_URL} 2> /dev/null` || CURL_RETURN_CODE=$?
if [ ${CURL_RETURN_CODE} -ne 0 ]; then
echo "Curl connection failed with return code - ${CURL_RETURN_CODE}"
else
echo "Curl connection success"
# Check http code for curl operation/response in CURL_OUTPUT
httpCode=$(echo "${CURL_OUTPUT}" | sed -e 's/.*\httpcode=//')
if [ ${httpCode} -ne 200 ]; then
echo "Curl operation/command failed due to server return code - ${httpCode}"
fi
fi

Answer 3

Like most programs, curl returns a non-zero exit status if it gets an error, so you can test it with if.
if curl 'https://xxxx:1234xxxx#abc.dfghj.com/xl_template.get_web_query?id=1035066' > HTML_Output
then echo "Request was successful"
else echo "CURL Failed"
fi
I don't know of a way to find out the percentage if the download fails in the middle.