Are you interested in our Early Access Program (EAP)? This program allows you to preview code, test in your lab and provide feedback prior to General Availability (GA) release of all Infoblox products. If so, please click the link here.

API & Integration, DevOps,NetOps,SecOps

Reply

curl giving different output when out is assigned to a var in a bash script

[ Edited ]
Techie
Posts: 7
3552     0

I am running the following cmd:

 

curl -k1 -u usernameSmiley Tongueassword -H "Content-Type: application/json" -X GET https://xxx.xxx.xxx.xxx/wapi/v2.5/extensibleattributedef? -d '{"name":"ea_name"}'

 

replacing the appropriate fields to obtain the object_ID for. This cmd outputs a json list with the object_ID and other information.

 

However, when I run this same cmd inside a bash script using the following syntax:

 

output=$(curl -k1 -u "$userID":"$passwd" -H "Content-Type: application/json" -X GET https://"$ip"/wapi/v2.5/extensibleattributedef? -d '{"name":"$ea_name"}')

 

I get the transfer stats from curl instead of the json list.

 

Does anyone know why the output is different when assigning the output to a variable? How can I get the json list stored in $output?

Re: curl giving different output when out is assigned to a var in a bash script

Moderator
Moderator
Posts: 191
3553     0

Use the curl "-s" or "--silent" option to supress the stats.

 

output=$(curl -s -k1 -u "$userID":"$passwd" -H "Content-Type: application/json" -X GET https://"$ip"/wapi/v2.5/extensibleattributedef? -d '{"name":"$ea_name"}')

Re: curl giving different output when out is assigned to a var in a bash script

Techie
Posts: 7
3553     0

The -s did suppress the stats, but I'm still not getting anything stored $output

Re: curl giving different output when out is assigned to a var in a bash script

Moderator
Moderator
Posts: 191
3553     0

This method is super finicky about single quotes, double quotes, and spaces.  I got it to work if the EA name doesn't have a space but could not get it to encode a space properly, for cases where the EA name has a space.

 

I'd reccomend going with Perl or Python instead if possible.  If you must use Bash + Curl, maybe work with the libcurl methods instead of redirected output from an external command.

 

Here's my working example.  I kept the extra "echo $ea_name" for troubleshooting.

 

#!/bin/bash

userID="admin"
passwd="infoblox"
ip="192.168.1.2"
ea_name="Role"

echo $ea_name

output=$(curl -s -k1 -u admin:infoblox -X GET https://$ip/wapi/v2.5/extensibleattributedef -H Content-Type:application/json -d {\"name\":\"$ea_name\"})

echo $output

And here's the output:

Role
[ { "_ref": "extensibleattributedef/b25lLmV4dGVuc2libGVfYXR0cmlidXRlc19kZWYkLlJvbGU:Role", "default_value": null, "name": "Role", "type": "STRING" } ]

Re: curl giving different output when out is assigned to a var in a bash script

Techie
Posts: 7
3553     0

Ok, I've done some debugging and have discovered the following:

 

I took the output of the curl cmd that was run from the cmdline, inserted it into a variable in another script and attempted to print that contents of that variable and got [].

 

There is something in the json list that is either preventing the json list from being stored or it is interferring with the echo cmd. I did try printf in place of echo and got the same [] output. I also tried writing to a file and got, you guessed it, [] in the file.

 

So, I'm changing my question to how do I properly store a multi-line json list in bash and how do I print it out.

 

 

Re: curl giving different output when out is assigned to a var in a bash script

[ Edited ]
Techie
Posts: 7
3553     0

Thanks @MRichard

 

I copied and pasted your script and I got the same result as earlier:

 

Role

[]

 

Can you tell me what distribution and version you ran this under?

 

I'm running RHEL-7.

Re: curl giving different output when out is assigned to a var in a bash script

Moderator
Moderator
Posts: 191
3553     0

You would need an EA called "Role" for it to work exactly.  That's not a default EA, so you should check on which
EAs are configured in the grid.

 

I ran it successfully on Mac OSX Mojave, 10.14.6 and on Centos 7.6.1810.

 

 

Re: curl giving different output when out is assigned to a var in a bash script

[ Edited ]
Techie
Posts: 7
3553     0

Understood.

 

I used one of our existing EA that does not contain a space. I just put Role in the post for simplicity.

 

If that worked in CentOS 7.6, then it should work in RHEL-7.6.

 

Weird.....ok, I'll give Python a go.

 

Thanks for your assistance.

Showing results for 
Search instead for 
Did you mean: 

Recommended for You