(PureBasic) Get Google Account Info from OAuth2 Access Token

See more Google APIs Examples

In the Google OAuth2 authorization flow, an application can know the email address of the Google account used to authorize access by requesting and processing user information from the Google UserInfo endpoint after obtaining an access token.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

    ; This example assumes the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    ; Implements the following CURL command:

    ; curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://www.googleapis.com/oauth2/v3/userinfo

    ; Use the following online tool to generate HTTP code from a CURL command
    ; Convert a cURL Command to HTTP Source Code

    ; Adds the "Authorization: Bearer YOUR_ACCESS_TOKEN" header.
    CkHttp::setCkAuthToken(http, "YOUR_ACCESS_TOKEN")

    sbResponseBody.i = CkStringBuilder::ckCreate()
    If sbResponseBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkHttp::ckQuickGetSb(http,"https://www.googleapis.com/oauth2/v3/userinfo",sbResponseBody)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    jResp.i = CkJsonObject::ckCreate()
    If jResp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoadSb(jResp,sbResponseBody)
    CkJsonObject::setCkEmitCompact(jResp, 0)

    Debug "Response Body:"
    Debug CkJsonObject::ckEmit(jResp)

    respStatusCode.i = CkHttp::ckLastStatus(http)
    Debug "Response Status Code = " + Str(respStatusCode)
    If respStatusCode >= 400
        Debug "Response Header:"
        Debug CkHttp::ckLastHeader(http)
        Debug "Failed."
        CkHttp::ckDispose(http)
        CkStringBuilder::ckDispose(sbResponseBody)
        CkJsonObject::ckDispose(jResp)
        ProcedureReturn
    EndIf

    ; Sample JSON response:
    ; (Sample code for parsing the JSON response is shown below)

    ; {
    ;   "sub": "112233445678901234567",
    ;   "name": "John Doe",
    ;   "given_name": "John",
    ;   "family_name": "Doe",
    ;   "profile": "https://plus.google.com/112233445678901234567",
    ;   "picture": "https://lh3.googleusercontent.com/a-/AOh14GiU-EXAMPLE",
    ;   "email": "johndoe@example.com",
    ;   "email_verified": true,
    ;   "locale": "en"
    ; }

    ; Sample code for parsing the JSON response...
    ; Use the following online tool to generate parsing code from sample JSON:
    ; Generate Parsing Code from JSON

    v_sub.s = CkJsonObject::ckStringOf(jResp,"sub")
    name.s = CkJsonObject::ckStringOf(jResp,"name")
    given_name.s = CkJsonObject::ckStringOf(jResp,"given_name")
    family_name.s = CkJsonObject::ckStringOf(jResp,"family_name")
    profile.s = CkJsonObject::ckStringOf(jResp,"profile")
    picture.s = CkJsonObject::ckStringOf(jResp,"picture")
    email.s = CkJsonObject::ckStringOf(jResp,"email")
    email_verified.i = CkJsonObject::ckBoolOf(jResp,"email_verified")
    locale.s = CkJsonObject::ckStringOf(jResp,"locale")


    CkHttp::ckDispose(http)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkJsonObject::ckDispose(jResp)


    ProcedureReturn
EndProcedure