Authorisation in Drchrono - node.js

Question

For authorization at DRchrono, I had created a GET request at https://drchrono.com/o/authorize/ with a redirect URL and clientId, as soon as I click on authorize I redirect to my redirect URL with code value in params,
then I made a POST request on https://drchrono.com/o/token/ via postman with this
{
"code":"x4xzqXXjlBWeeQxEzjyE8thFTIW0eT",
"grant_type": "authorization_code",
"redirect_uri": "",
"client_id": " ",
"client_secret": ""
}
client_id and client_secret value taken from DrChrono API management page.
After making a post instead of getting the access token, I get "400 bad requests" in response.
I am not getting what that thing I am missing.
for doing all this thing I followed DRchrono official document :
https://drchrono.com/api-docs/v4?application=4217#section/Authorization/Initial-authorization
Can anyone help me with this??

Answer 1

My issue got resolved by making these 2 changes:
while making the post request we have to pass
Content-Type=application/x-www-form-urlencoded
in header
const Header = {
"Content-Type": "application/x-www-form-urlencoded",
};
we also need to convert our json object into x-www-form-urlencoded, like this:
var postData = {
code:query.code,
grant_type: "authorization_code",
redirect_uri: " ",
client_id: " ",
client_secret: " ",
};
var encodedData = "";
for (key in postData) {
encodedData += encodeURIComponent(key)+"="+encodeURIComponent(postData[key])+"&";
}
and then finally pass Header, encodedData value in post request
request.post("https://drchrono.com/o/token/", (data = encodedData), {
headers: Header,
}) .then((res) => {
console.log("RESPONSE RECEIVED: ", res.data);
})
This article helped me for testing the Authentication from postman: http://drchronoapi.wpengine.com/connecting-to-drchronos-api-via-postman/
Hope this helps to others who faced similar issue :)