execute in bash command stored in variable [duplicate] - json

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Bash script: Use string variable in curl JSON Post data
(3 answers)
Closed 2 years ago.
I'm trying to script a mailing using a curl api (this is the base API, in mine the html part is changed with "xmessage":
curl -s \
-X POST \
--user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
https://api.mailjet.com/v3.1/send \
-H 'Content-Type: application/json' \
-d '{
"Messages":[
{
"From": {
"Email": "pilot#mailjet.com",
"Name": "Mailjet Pilot"
},
"To": [
{
"Email": "passenger1#mailjet.com",
"Name": "passenger 1"
}
],
"Subject": "Your email flight plan!",
"TextPart": "Dear passenger 1, welcome to Mailjet! May the delivery force be with you!",
"HTMLPart": "<h3>Dear passenger 1, welcome to Mailjet!</h3><br />May the delivery force be with you!",
"CustomCampaign": "SendAPI_campaign",
"DeduplicateCampaign": true
}
]
}'
My script look like this :
...
message=$(cat ./message.txt)
message=${message//"xdate"/$courseDate}
message=${message//"xcoursecode"/$courseCode}
message=${message//"xsubtitle"/$subtitle}
message=${message//"\r"/""}
message=${message//"\r\n"/""}
message=${message//"\n"/""}
message=${message//"\""/"\\\""}
message=${message//"'"/"&apos;"}
mailJet=$(cat ./mailjet.txt) # containing my API as described as above
mailJet=${mailJet//"xmessage"/$message}
echo $mailJet
eval $mailJet
the command "eval $mailJet" does not works but if I do a copy paste in the terminal of the "echo $mailJet" output my command works
The eval $mailJet give the following error :
{"ErrorIdentifier":"5cce36c5-373c-48ca-90b8-2b6bfc5df526","ErrorCode":"mj-0031","StatusCode":400,"ErrorMessage":"Request payload contains not valid UTF-8 encoded characters"}
Something that partially worked, was to put directly the mailJet.txt content in the script
but I'm struggling to find the syntax to replace the xmessage by what's in $message.
Like this it did not worked :
...
message=$(cat ./message.txt)
message=${message//"xdate"/$courseDate}
message=${message//"xcoursecode"/$courseCode}
message=${message//"xsubtitle"/$subtitle}
message=${message//"\r"/""}
message=${message//"\r\n"/""}
message=${message//"\n"/""}
message=${message//"\""/"\\\""}
message=${message//"'"/"&apos;"}
curl -s \
-X POST \
--user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
https://api.mailjet.com/v3.1/send \
-H 'Content-Type: application/json' \
-d '{
"Messages":[
{
"From": {
"Email": "pilot#mailjet.com",
"Name": "Mailjet Pilot"
},
"To": [
{
"Email": "passenger1#mailjet.com",
"Name": "passenger 1"
}
],
"Subject": "Your email flight plan!",
"TextPart": "Dear passenger 1, welcome to Mailjet! May the delivery force be with you!",
"HTMLPart": "$message", ## neither like this : "HTMLPart": "'$message'",
"CustomCampaign": "SendAPI_campaign",
"DeduplicateCampaign": true
}
]
}'
Whereas if I put any html stuff instead of $message in the curl api, the script run without any issue.
I'm stuck (and not a great bash coder or even coder at all)
Many thanks by advance for your help.

Answer 1

I think your problems start at
-d '{
This use of a single quote means that nothing in this section is interpreted by bash. "$message" later on will be treated as the text $ and message.
If this is the issue, then what you need to do is unquote around the variable names, but also double-quote arround them, so you write '"$message"' Or, if you need the double-quotes to appear inside the curl command "'"$message"'".
Note you can't have the ## comment either, but I assume you put that in for our benefit.