curl cheat sheet / published by https://github.com/dacr/code-examples-manager #8170fd16-e03f-4e76-99b6-1cf8472a0f18/7bc3910f7daf8e7285d476f3cc66da4a22b5306e

curl.md

curl cheat sheet

Get the redirection full URL

curl -Ls -o /dev/null -w %{url_effective} https://mapland.fr/echo

Post JSON

curl -d '{"message":"hello"}' -H "Content-Type: application/json"  https://httpbin.org/post

echo '{"message":"hello"}' > file.json
curl -d @file.json -H "Content-Type: application/json"  https://httpbin.org/post

Parameterized json

How to generate customized / parameterized json from shell :

MSG="Hello world"

generate_json() {
  cat <<EOF
{
  "message": {
    "content":"$MSG"
  } x 
}
EOF
}

curl -s -XPOST "https://httpbin.org/post" -H 'Content-Type: application/json' --data "$(generate_json)" | jq ".json"

basic authentication with curl

curl -u "${BASIC_AUTH_USER}:${BASIC_AUTH_PASSWORD}" $URL

basic authentication using token with curl

AUTH=$(echo -ne "${BASIC_AUTH_USER}:${BASIC_AUTH_PASSWORD}" | base64 --wrap 0)
curl \
  --header "Content-Type: application/json" \
  --header "Authorization: Basic $AUTH" \
  --request POST \
  --data  '{"key1":"value1", "key2":"value2"}' \
  $URL

curl --header "PRIVATE-TOKEN: $GITLAB_TOKEN" \
  https://gitlab.com/api/v4/groups/givengroup/projects | \
  -o repositories.json


curl --header "Authorization: Bearer xxxxxxxxx" https://somewhere.comm/

to ignore SSL certificate issues

curl --insecure https://mapland.fr/

Get SSL certificate information from web remote site

curl --insecure -vvI https://www.mapland.fr

to extract some fields from a json array

curl -s 'https://www.data.gouv.fr/api/1/datasets/551d4ff3c751df55da0cd89f/' -H 'accept: application/json' | jq '.resources[] | "\(.id) \(.created_at) \(.url)"'