DataFlex

Get Email HTML Body with Images as Base64 Inline Data

See more Email Object Examples

Demonstrates how to get the email's HTML body with referenced MIME parts (i.e. related images) embedded in the HTML as base64 data.

Note: This example requires Chilkat v10.1.2 or later.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoEmail
    Variant vSbHtml
    Handle hoSbHtml
    Boolean iInlineImageData
    String sHtmlStr
    String sTemp1

    Move False To iSuccess

    // ---------------------------------------------------------------------------------------------------------------------------------
    // Prerequisite Knowledge:

    // In HTML emails, CID (Content-ID) image references allow embedding images directly into the email as part of the message body, 
    // instead of linking to external images. 

    // * Each embedded image is assigned a unique Content-ID (CID) in the email�s MIME structure.
    // * The CID is a unique identifier, such as image001@domain.com.

    // For example: <img src="cid:image001@domain.com" alt="Embedded Image">
    // ---------------------------------------------------------------------------------------------------------------------------------

    // However, in HTML, you can embed image data directly into an <img> tag by using Base64 encoding. 
    // This method eliminates the need for external image files by encoding the image as a string and including it within the HTML.

    // For example:
    // <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA .... RU5ErkJggg==" alt="Embedded Image">

    // Chilkat added the GetHtmlBodySb method in version 10.1.2 which provides an option for gathering the 
    // image data from the mulitpart/related MIME parts of the email, and replaces the "cid" img references with
    // the base64 data.

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End
    Get ComLoadEml Of hoEmail "qa_data/eml/sample.eml" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoEmail To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbHtml
    If (Not(IsComObjectCreated(hoSbHtml))) Begin
        Send CreateComObject of hoSbHtml
    End
    Move True To iInlineImageData
    Get pvComObject of hoSbHtml to vSbHtml
    Get ComGetHtmlBodySb Of hoEmail iInlineImageData vSbHtml To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoEmail To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // The HTML with inlined base64 image data is now contained in the StringBuilder.
    Get ComGetAsString Of hoSbHtml To sHtmlStr

    Get ComWriteFile Of hoSbHtml "c:/temp/qa_output/sample.html" "utf-8" False To iSuccess

    Showln "Success."


End_Procedure