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Save LindaLawton/cff75182aac5fa42930a09f58b63a309 to your computer and use it in GitHub Desktop.
# Tutorial https://www.daimto.com/how-to-get-a-google-access-token-with-curl/ | |
# YouTube video https://youtu.be/hBC_tVJIx5w | |
# Client id from Google Developer console | |
# Client Secret from Google Developer console | |
# Scope this is a space seprated list of the scopes of access you are requesting. | |
# Authorization link. Place this in a browser and copy the code that is returned after you accept the scopes. | |
https://accounts.google.com/o/oauth2/auth?client_id=[Application Client Id]&redirect_uri=http://127.0.0.1&scope=[Scopes]&response_type=code | |
# Exchange Authorization code for an access token and a refresh token. | |
curl \ | |
--request POST \ | |
--data "code=[Authentcation code from authorization link]&client_id=[Application Client Id]&client_secret=[Application Client Secret]&redirect_uri=http://127.0.0.1&grant_type=authorization_code" \ | |
https://accounts.google.com/o/oauth2/token | |
# Exchange a refresh token for a new access token. | |
curl \ | |
--request POST \ | |
--data 'client_id=[Application Client Id]&client_secret=[Application Client Secret]&refresh_token=[Refresh token granted by second step]&grant_type=refresh_token' \ | |
https://accounts.google.com/o/oauth2/token |
Google has recently made a change that breaks this script How to authorize a curl script to Google Oauth after OAuth out-of-band oob flow is deprecated?. I have a question up on Stack overflow to see if it can be fixed or not.
The solution was to use http://127.0.0.1 instead.
I know for a fact that your not going to be able to do it with postman. Im not sure that curl is able to do the encoding needed if you manage to create a valid JWT with curl i would love to see the code. heres a link to the documentation https://developers.google.com/identity/protocols/oauth2/service-account
Here is a bash function to generate jwt, needs openssl to craete the payload data and jq to extract values from json. Wrote this function recently for some google drive stuff
###################################################
# Generate rs256 jwt just with cli commands and shell
# Specifically for gdrive service accounts usage
# Globals: None
# Arguments: 2
# ${1} = service account json file contents ( should contain client_email and private key )
# ${2} = SCOPE for gdrive ( if not given then global var SCOPE is used )
# Result: print jwt
# Refrences:
# https://stackoverflow.com/questions/46657001/how-do-you-create-an-rs256-jwt-assertion-with-bash-shell-scripting
# Inspired by implementation by Will Haley at:
# http://willhaley.com/blog/generate-jwt-with-bash/
###################################################
_generate_jwt() {
declare json="${1:?Error: Give service json file contents}" \
scope="${2:-${SCOPE}}" aud="https://oauth2.googleapis.com/token" \
header='{"alg":"RS256","typ":"JWT"}' \
algo="256" scope payload_data iss exp iat rsa_secret signed_content sign
if iss="$(jq .client_email <<< "${json}")" &&
rsa_secret="$(jq .private_key <<< "${json}")"; then
rsa_secret="$(printf "%b\n" "${rsa_secret}")"
else
printf "Error: Invalid service account file.\n" && return 1
fi
iat="$(printf "%(%s)T\\n" "-1")" exp="$((iat + 3400))"
b64enc() { : "$(openssl enc -base64 -A)" && : "${_//+/-}" && : "${_//\//_}" && printf "%s\n" "${_//=/}"; }
payload_data='{"iss":"'${iss}'","scope":"'${scope}'","aud":"'${aud}'","exp":'${exp}',"iat":'${iat}'}'
{
signed_content="$(b64enc <<< "${header}").$(b64enc <<< "${payload_data}")"
sign="$(printf %s "${signed_content}" | openssl dgst -binary -sha"${algo}" -sign <(printf '%s\n' "${rsa_secret}") | b64enc)"
} || return 1
printf '%s.%s\n' "${signed_content}" "${sign}"
return 0
}
P.S: Also answered your post on stackoverflow
The out-of-band method no longer works which is why the script is broken. I have some scripts that use the loopback method on desktop and are working as of this posting.
Thanks @jay!
@jay you can use http://127.0.0.1
instead of urn:ietf:wg:oauth:2.0:oob
and it works fine.
Works perfectly - thanks!
Why is there a consent screen for the first step to get the code? How would I possible click the Accept in a server environment? Could anyone please help me out if possible.
@rohanmenon96 you wouldn't do this on a server you would do it on your local machine. A server doesn't have a browser window. Get a refresh token then store it and upload that to your server
unrelated but it's worth the reference,
get access_token using google/apiclient library in Laravel(php8),
This access_token works with any project in 1 firebase
Found a good link, Goog OAUth2 Playground helped generate the refresh token with correct scope, etc. Doc here, link is in the doc:
https://developers.google.com/google-ads/api/docs/oauth/playground
When i hit curl command i am getting below url
curl --request POST --data "code=4/0AX4XfWiu_WHUUrStOBoyK4G4Q6fhQqJXdETW9rKveglB5ik3K5HvjyQqHyA&scope=https://mail.google.com&client_id=288234510771-cv3hjbluppni7pn79cp8l9j46ls8ildp.apps.googleusercontent.com&client_secret=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&redirect_uri=http//localhost&grant_type=authorization_code" https://accounts.google.com/o/oauth2/token
Error:
{
"error": "invalid_request",
"error_description": "\nYou can\u0026#39;t sign in to this app because it doesn\u0026#39;t comply with Google\u0026#39;s OAuth 2.0 policy for keeping apps secure.\n\nYou can let the app developer know that this app doesn\u0026#39;t comply with one or more Google validation rules.\n "
}
Some one please help