I'm creating bash script to check what HTTP code a given URL returning. I have file with about 50k of URLs in JSON format; it's the first one (head of file):


    and so on

I need to loop over this file, check what HTTP code is every URL returning and save it in another file in format HTTP code + URL. So far I have only this curl command to check http code

  curl -s -o /dev/null -I -w "%{http_code}\n" URL >> httpCodeFile 

I would appreciate any help and advise on what tools/aproach (grep,awk,sed) I should use.

I've created this function to get URL from file but I'm sure about syntax :

function checkHTTP(){

        cat URL_list | while read line
                var =  $(grep documentURL) URL_list

                curl -s -o /dev/null -I -w "%{http_code}\n" ${var} +  " TEST "  >> httpCodeFile


I'm getting only 000 despite that many of the URL should return 404.


The right way with jq + curl solution:

Sample valid input.json:

  "responseHeader": {
    "status": 0,
    "QTime": 7336
  "response": {
    "numFound": 50032,
    "start": 0,
    "maxScore": 1,
    "docs": [
        "documentURL": "https://unix.stackexchange.com/questions"
        "documentURL": "https://unix.stackexchange.com/problems"
        "documentURL": "https://stackoverflow.com/questions"
        "documentURL": "https://stackoverflow.com/issues"


jq -r '.response.docs[].documentURL 
       | "curl -s -o /dev/null -I -w \"%{http_code} \(.)\n\" --url \(.)"' input.json \
       | sh > http_codes.out

The resulting http_codes.out contents:

$ cat http_codes.out 
200 https://unix.stackexchange.com/questions
404 https://unix.stackexchange.com/problems
200 https://stackoverflow.com/questions
404 https://stackoverflow.com/issues
| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.