CODEWITHSUNDEEP
bashcurleclipse-hawkbithawkbit
Preeti
Preeti

Reputation: 723

How to store curl response in bash script?

I am trying to download file from hawkbit using curl in a bash script. Below is the curl invocation

curl --fail -sS -O -C - --location "${HEADERS[@]}" -w "%{http_code}\n" -X GET "$temp_url"

Now I want to store any error message from curl --fail if there is any to a variable. (example: curl: (22) The requested URL returned error: 416)

#!/bin/bash

response=$(curl --fail -sS -O -C - --location "${HEADERS[@]}" -w "%{http_code}\n" -X GET "$temp_url")
exit_status=$?
echo "exit status is $exit_status"
http_code=${response: -3}

if [ $exit_status -eq "0" ] && [ $http_code -eq "200" ] ; then
    echo "Success"
else
    echo "Failure"
    exit $exit_status
fi

Can anyone please let me know how should I improve the behavior of curl response?

P.S: Please let me know if any info is missing

Upvotes: -2

Views: 686

Answers (2)

Ed Morton
Ed Morton

Reputation: 203502

I think what you're really asking for help with is how to store the error message from a curl failure, if any:

$ curl --fail 'foo:bar'
curl: (3) URL using bad/illegal format or missing URL

$ echo $?
3

curl Fail:

$ { response=$( curl --fail 'foo:bar' 2>&1 >&3 3>&-); } 3>&1


$ echo $?
3

$ echo "$response"
curl: (3) URL using bad/illegal format or missing URL

curl Success:

$ { response=$( curl --fail 'http://example.com' 2>&1 >&3 3>&-); } 3>&1
<!doctype html>
<html>
<head>
    <title>Example Domain</title>

    <meta charset="utf-8" />
    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <style type="text/css">
    body {
        background-color: #f0f0f2;
        margin: 0;
        padding: 0;
        font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;

    }
    div {
        width: 600px;
        margin: 5em auto;
        padding: 2em;
        background-color: #fdfdff;
        border-radius: 0.5em;
        box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
    }
    a:link, a:visited {
        color: #38488f;
        text-decoration: none;
    }
    @media (max-width: 700px) {
        div {
            margin: 0 auto;
            width: auto;
        }
    }
    </style>
</head>

<body>
<div>
    <h1>Example Domain</h1>
    <p>This domain is for use in illustrative examples in documents. You may use this
    domain in literature without prior coordination or asking for permission.</p>
    <p><a href="https://www.iana.org/domains/example">More information...</a></p>
</div>
</body>
</html>


$ echo $?
0

$ echo "$response"

See https://unix.stackexchange.com/a/474195/133219.

Upvotes: 0

Swifty
Swifty

Reputation: 189

You are storing the "exit_status" before your curl command. This will always set it to the value 0. And your curl command doesn't seem to be complete either, but that's another matter.

Upvotes: 2

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