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DataFlex Web API Examples

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(DataFlex) ETrade OAuth1 Authorization (3-legged) Step 2

Demonstrates the final step in 3-legged OAuth1 authorization for the ETrade REST API. Example uses the OAuth1 verifier code that was copy-and-pasted from the browser in the 1st step. The end result of this final OAuth1 step is an access token that can be used to make ETrade REST API calls.

See https://apisb.etrade.com/docs/api/authorization/get_access_token.html

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    String sConsumerKey
    String sConsumerSecret
    String sRequestTokenUrl
    String sAuthorizeUrl
    String sAccessTokenUrl
    Handle hoHttp
    Boolean iSuccess
RequestToken    Handle hoJsonRequestToken
    String sRequestToken
    String sRequestTokenSecret
    Variant vResp
    Handle hoResp
    Handle hoHashTab
    String sAccessToken
    String sAccessTokenSecret
    Handle hoJson
    Handle hoFac
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Move "ETRADE_CONSUMER_KEY" To sConsumerKey
    Move "ETRADE_CONSUMER_SECRET" To sConsumerSecret

    Move "https://apisb.etrade.com/oauth/request_token" To sRequestTokenUrl
    Move "https://us.etrade.com/e/t/etws/authorize" To sAuthorizeUrl
    Move "https://apisb.etrade.com/oauth/access_token" To sAccessTokenUrl

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End
    Move True To iSuccess

    Set ComOAuth1 Of hoHttp To True
    Set ComOAuthConsumerKey Of hoHttp To sConsumerKey
    Set ComOAuthConsumerSecret Of hoHttp To sConsumerSecret
    Set ComOAuthCallback Of hoHttp To "oob"

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonRequestToken
    If (Not(IsComObjectCreated(hoJsonRequestToken))) Begin
        Send CreateComObject of hoJsonRequestToken
    End
    Get ComLoadFile Of hoJsonRequestToken "qa_data/tokens/etrade_request_token.json" To iSuccess
    Get ComStringOf Of hoJsonRequestToken "oauth_token" To sRequestToken
    Get ComStringOf Of hoJsonRequestToken "oauth_token_secret" To sRequestTokenSecret

    // ------------------------------------------------------------------------------
    // Exchange the OAuth Request Token for an OAuth Access Token.

    Set ComOAuthToken Of hoHttp To sRequestToken
    Set ComOAuthTokenSecret Of hoHttp To sRequestTokenSecret

    // This is the verifier that was interactively copy-and-pasted from the browser back to our app.
    Set ComOAuthVerifier Of hoHttp To "NJ07S"

    Get ComQuickGetObj Of hoHttp sAccessTokenUrl To vResp
    If (IsComObject(vResp)) Begin
        Get Create (RefClass(cComChilkatHttpResponse)) To hoResp
        Set pvComObject Of hoResp To vResp
    End
    Get ComLastMethodSuccess Of hoHttp To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Make sure a successful response was received.
    Get ComStatusCode Of hoResp To iTemp1
    If (iTemp1 <> 200) Begin
        Get ComStatusLine Of hoResp To sTemp1
        Showln sTemp1
        Get ComHeader Of hoResp To sTemp1
        Showln sTemp1
        Get ComBodyStr Of hoResp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // If successful, the resp.BodyStr contains something like this:
    // oauth_token=85123455-fF41296Bi3daM8eCo9Y5vZabcdxXpRv864plYPOjr&oauth_token_secret=afiYJOgabcdSfGae7BDvJVVTwys8fUGpra5guZxbmFBZo
    Get ComBodyStr Of hoResp To sTemp1
    Showln sTemp1

    Get Create (RefClass(cComChilkatHashtable)) To hoHashTab
    If (Not(IsComObjectCreated(hoHashTab))) Begin
        Send CreateComObject of hoHashTab
    End
    Get ComBodyStr Of hoResp To sTemp1
    Get ComAddQueryParams Of hoHashTab sTemp1 To iSuccess

    Get ComLookupStr Of hoHashTab "oauth_token" To sAccessToken
    Get ComLookupStr Of hoHashTab "oauth_token_secret" To sAccessTokenSecret

    Send Destroy of hoResp

    // The access token + secret is what should be saved and used for
    // subsequent REST API calls.
    Showln "Access Token = " sAccessToken
    Showln "Access Token Secret = " sAccessTokenSecret

    // Save this access token for future calls.
    // Just in case we need user_id and screen_name, save those also..
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComAppendString Of hoJson "oauth_token" sAccessToken To iSuccess
    Get ComAppendString Of hoJson "oauth_token_secret" sAccessTokenSecret To iSuccess

    Get Create (RefClass(cComCkFileAccess)) To hoFac
    If (Not(IsComObjectCreated(hoFac))) Begin
        Send CreateComObject of hoFac
    End
    Get ComEmit Of hoJson To sTemp1
    Get ComWriteEntireTextFile Of hoFac "qa_data/tokens/etrade.json" sTemp1 "utf-8" False To iSuccess

    Showln "Success."


End_Procedure

 

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