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DataFlex Examples

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(DataFlex) URL Encoding Charset in POST Query Params

Demonstrates how to control the URL encoding charset in POST query params.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    String sNameWin1252Encoded
    Handle hoSb
    Boolean iSuccess
    Handle hoHttp
    Variant vReq
    Handle hoReq
    Variant vResp
    Handle hoResp
    String sTemp1
    Boolean bTemp1

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

    // We have the string "MÆRSK".
    Move "M%E6RSK" To sNameWin1252Encoded

    // Note: The DecodeAndAppend method is newly added in Chilkat v9.5.0.87
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSb
    If (Not(IsComObjectCreated(hoSb))) Begin
        Send CreateComObject of hoSb
    End
    Get ComDecodeAndAppend Of hoSb sNameWin1252Encoded "url" "windows-1252" To iSuccess

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

    // We're setting the session log filename so we can see the exact request sent.
    Set ComSessionLogFilename Of hoHttp To "qa_output/sessionLog.txt"

    // First demonstrate a simple application/x-www-form-urlencoded POST

    Get Create (RefClass(cComChilkatHttpRequest)) To hoReq
    If (Not(IsComObjectCreated(hoReq))) Begin
        Send CreateComObject of hoReq
    End

    // Set the Charset = "utf-8" to cause URL encoding to use utf-8.
    Set ComCharset Of hoReq To "utf-8"

    Get ComGetAsString Of hoSb To sTemp1
    Send ComAddParam To hoReq "name" sTemp1

    Get pvComObject of hoReq to vReq
    Get ComPostUrlEncoded Of hoHttp "https://www.chilkatsoft.com/something" vReq 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 = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 15
    // 
    // 	name=M%C3%A6RSK

    Send Destroy of hoResp

    // ---------------------------------------------------------------
    // Switch to windows-1252

    Set ComCharset Of hoReq To "windows-1252"

    Get pvComObject of hoReq to vReq
    Get ComPostUrlEncoded Of hoHttp "https://www.chilkatsoft.com/something" vReq 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 = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // This is the request that is sent:
    // Notice that windows-1252 is used in the query param (the letter 'Æ' is %E6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 12
    // 
    // 	name=M%E6RSK

    Send Destroy of hoResp

    // ---------------------------------------------------------------
    // Let's do the same with SynchronousRequest, switching back to utf-8

    Set ComPath Of hoReq To "/something"
    Set ComHttpVerb Of hoReq To "POST"
    Set ComContentType Of hoReq To "application/x-www-form-urlencoded"

    Set ComCharset Of hoReq To "utf-8"

    Get pvComObject of hoReq to vReq
    Get ComSynchronousRequest Of hoHttp "www.chilkatsoft.com" 443 True vReq 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 = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: application/x-www-form-urlencoded
    // 	Content-Length: 15
    // 
    // 	name=M%C3%A6RSK

    Send Destroy of hoResp

    // ---------------------------------------------------------------
    // Let's do a PostXml where the query params are in the HTTP request start line, 
    // and the Content-Type is text/xml where the body of the request is XML.

    Set ComPath Of hoReq To "/something"
    Set ComHttpVerb Of hoReq To "POST"
    Set ComContentType Of hoReq To "text/xml"
    Get ComLoadBodyFromString Of hoReq "<test>123</test>" "utf-8" To iSuccess
    Set ComCharset Of hoReq To "utf-8"

    // Remember... our request object still contains the query param added in the above call to AddParam.

    Get pvComObject of hoReq to vReq
    Get ComSynchronousRequest Of hoHttp "www.chilkatsoft.com" 443 True vReq 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 = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // This is the request that is sent:
    // Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

    // 	POST /something?name=M%C3%A6RSK HTTP/1.1
    // 	Host: www.chilkatsoft.com
    // 	Content-Type: text/xml
    // 	Content-Length: 16
    // 
    // 	<test>123</test>

    Send Destroy of hoResp


End_Procedure

 

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