how to use a ruby rails variable in the curl (bash) script

Question

I am trying to run this curl script in my ruby rails application:

%x{ curl -F token='08F14AE57696E458BA6FC6A203F57E69' -F overwriteBehavior=normal 
-F content=record -F type=flat -F format=json 
-F data='[{"record_id":"123","seat_id_seq":"bbb","address":"bbb","price":"bbb","email":"bbb","tickets1_complete":"2"}]'  
'https://cri-datacap.org/api/' }

and its working fine. Now I want don't want to hardcode the values so i am trying to give this values by the variable.

These variable contains value from the text field on my rails application:

%x{ curl -F token='08F14AE57696E458BA6FC6A203F57E69' -F overwriteBehavior=normal 
-F content=record -F type=flat -F format=json 
-F data='[{"record_id":"#{params[:record_id]}","seat_id_seq":"bbb","address":"bbb","price":"bbb","email":"bbb","tickets1_complete":"2"}]'  
'https://cri-datacap.org/api/' }

so I have tried for one variable record_id, but its not working.. This script is written in my controller.

Here are some simple examples to get you started; it's a Ruby std library. ruby-doc.org/stdlib-2.1.3/libdoc/net/http/rdoc/Net/HTTP.html — virtuexru
– virtuexru, Commented Jan 18, 2017 at 20:05

Abhishek Kumar · Accepted Answer · 2017-01-19 06:08:38Z

3

Ignoring the fact that using curl externally when libraries like curb exist, using %x{...} for this is extremely messy. What you want to do is call system:

data = [
  {
    record_id: params[:record_id],
    seat_id_seq: "bbb",
    address: "bbb",
    price: "bbb",
    email: "bbb",
    tickets1_complete: 2
  }
]

system(
  "curl",
  "-F", "overwriteBehavior=normal",
  "-F", "content=record",
  "-F", "type=flat",
  "-F", "format=json",
  "-F", "data=#{JSON.dump(data)}",
  'https://cri-datacap.org/api/'
)

When you're writing JSON data, do try and use JSON.dump or .to_json to ensure your document is 100% valid.

edited Jan 19, 2017 at 6:08

Abhishek Kumar

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answered Jan 18, 2017 at 19:14

tadman

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8 Comments

Mohammad Shahbaz Over a year ago

I replaced payload with data, but it is still not inserting data .

Mohammad Shahbaz Over a year ago

It looks like , it is not getting data in params[:record_id]

tadman Over a year ago

I'd switch this over to curb code at the very least, if not Faraday before attempting to get everything working properly. That can make debugging a lot less messy.

Mohammad Shahbaz Over a year ago

I actually do not know how to use curb.. I found this solution on net, and thought to try

tadman Over a year ago

That's why they have documentation, it helps you understand. curb isn't hard to use, it's essentially 1:1 mapped against curl command-line arguments, just in Ruby code.

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