Chilkat Examples

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DataFlex Web API Examples

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(DataFlex) Emoji Tweet

Demonstrates posting a status update that includes an emoji character.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoJson
    Boolean iSuccess
    Handle hoRest
    Variant vOauth1
    Handle hoOauth1
    Boolean iBAutoReconnect
    Handle hoSbText
    String sResp
    Handle hoJsonResponse
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

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

    // ----------------------------------------------------------------------
    // This initial setup, which involves setting the OAuth1 properties and connecting
    // to api.twitter.com, is only required once at the beginning.  Once connected, the same
    // object instance may be re-used, and if necessary, it will automatically reconnect
    // as needed.

    // Assume we've previously obtained an access token and saved it to a JSON file..
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComLoadFile Of hoJson "qa_data/tokens/twitter.json" To iSuccess

    Get Create (RefClass(cComChilkatRest)) To hoRest
    If (Not(IsComObjectCreated(hoRest))) Begin
        Send CreateComObject of hoRest
    End
    Get Create (RefClass(cComChilkatOAuth1)) To hoOauth1
    If (Not(IsComObjectCreated(hoOauth1))) Begin
        Send CreateComObject of hoOauth1
    End

    Set ComConsumerKey Of hoOauth1 To "TWITTER_CONSUMER_KEY"
    Set ComConsumerSecret Of hoOauth1 To "TWITTER_CONSUMER_SECRET"
    Get ComStringOf Of hoJson "oauth_token" To sTemp1
    Set ComToken Of hoOauth1 To sTemp1
    Get ComStringOf Of hoJson "oauth_token_secret" To sTemp1
    Set ComTokenSecret Of hoOauth1 To sTemp1
    Set ComSignatureMethod Of hoOauth1 To "HMAC-SHA1"
    Get ComGenNonce Of hoOauth1 16 To iSuccess

    Get pvComObject of hoOauth1 to vOauth1
    Get ComSetAuthOAuth1 Of hoRest vOauth1 False To iSuccess

    Move True To iBAutoReconnect
    Get ComConnect Of hoRest "api.twitter.com" 443 True iBAutoReconnect To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // This ends the initial setup...
    // ----------------------------------------------------------------------

    // For this example, I've pre-created a text file containing two emoji
    // characters (the "ghost" emoji, and a "face savouring delicious food" emoji).  
    // This text file was saved using the utf-8 encoding.

    // The utf-8 bytes for the ghost emoji are 0x9f 0x91 0xbb.  (Note: This is the utf-8
    // representation that does not use surrogate pairs.)
    // 
    // The utf-8 bytes for the "face savouring delicious food" emoji are \xF0\x9F\x98\x8B.

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbText
    If (Not(IsComObjectCreated(hoSbText))) Begin
        Send CreateComObject of hoSbText
    End
    Get ComLoadFile Of hoSbText "qa_data/txt/ghost_emoji.txt" "utf-8" To iSuccess
    Get ComPrepend Of hoSbText "Test tweet using two emoji chars: " To iSuccess

    // Send a tweet...
    Get ComClearAllQueryParams Of hoRest To iSuccess
    Get ComGetAsString Of hoSbText To sTemp1
    Get ComAddQueryParam Of hoRest "status" sTemp1 To iSuccess
    Get ComFullRequestFormUrlEncoded Of hoRest "POST" "/1.1/statuses/update.json" To sResp
    Get ComLastMethodSuccess Of hoRest To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonResponse
    If (Not(IsComObjectCreated(hoJsonResponse))) Begin
        Send CreateComObject of hoJsonResponse
    End
    Set ComEmitCompact Of hoJsonResponse To False
    Get ComLoad Of hoJsonResponse sResp To iSuccess

    Get ComResponseStatusCode Of hoRest To iTemp1
    If (iTemp1 <> 200) Begin
        Get ComEmit Of hoJsonResponse To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Show the successful response:
    Get ComEmit Of hoJsonResponse To sTemp1
    Showln sTemp1
    Showln "Success."


End_Procedure

 

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