C

Parse MIME to get Binary Data (such as GIF, JPG, or any binary file)

See more MIME Examples

Demonstrates how to parse a MIME to get binary data. This example extracts the image data for a GIF image to an in-memory byte array, and also to a file.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800";

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif";
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
zu/Oxta1rb17a6UhAK0hAPe9rb2Ec7V7a71rUpwpCL0xCJwhAOfOxta9tcatpdallM6cjMaUhK1C
IZwxELU5EK0xCLUxCN61pcacjK1rUrVaOaVKKZxCIZwxCKUxCL05CLUxAM6llO+1nMZzUr1rSrVS
KaVCGK1CGLVCEJQxCK05CLU5CIwpAKUxAK0xAM69tffWxrVrSrVaMbVKGMZKEL1CCLU5AP/v597O
xufGtcallNaljLWEa96ce9aUc717Wq1aMcZjMbVaKbVSIa1KGL1SGJw5CK1CCLVCCMZKCM5KCMZC
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RZ8cjRWro0QEEsQVGTiKkLAM5QNGFWrAQFNLBIzABQPLRktQQAA7

--------------080707010302060306060800--

C

#include <C_CkMime.h>
#include <C_CkByteData.h>
#include <C_CkFileAccess.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMime mime;
    HCkMime part2;
    HCkByteData binaryData;
    HCkFileAccess fac;

    success = FALSE;

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

    mime = CkMime_Create();

    //  Load the sampleMime2.txt file into the MIME object.
    //  (This file is available at https://www.chilkatsoft.com/testData/sampleMime2.txt )

    success = CkMime_LoadMimeFile(mime,"sampleMime2.txt");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        CkMime_Dispose(mime);
        return;
    }

    //  The GIF image is the 2nd sub-part located directly under the
    //  top-level MIME node.  Indexing begins at 0, therefore the 2nd
    //  sub-part is at index 1.

    part2 = CkMime_Create();
    success = CkMime_PartAt(mime,1,part2);
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        CkMime_Dispose(mime);
        CkMime_Dispose(part2);
        return;
    }

    binaryData = CkByteData_Create();

    //  The GetBodyBinary method returns the binary bytes
    //  of the part's body, automatically decoded from whatever
    //  content-transfer-encoding might be used (such as base64).
    success = CkMime_GetBodyBinary(part2,binaryData);

    //  We now have the binary bytes of the GIF image in binaryData.
    //  Save it to a file.
    fac = CkFileAccess_Create();
    success = CkFileAccess_WriteEntireFile(fac,"out1.gif",binaryData);
    if (success == FALSE) {
        printf("%s\n",CkFileAccess_lastErrorText(fac));
        CkMime_Dispose(mime);
        CkMime_Dispose(part2);
        CkByteData_Dispose(binaryData);
        CkFileAccess_Dispose(fac);
        return;
    }

    //  An easier way to save the body content to a file,
    //  assuming your application does not need to access
    //  the binary data in-memory, is to call SaveBody
    success = CkMime_SaveBody(part2,"out2.gif");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(part2));
        CkMime_Dispose(mime);
        CkMime_Dispose(part2);
        CkByteData_Dispose(binaryData);
        CkFileAccess_Dispose(fac);
        return;
    }

    printf("Finished.\n");


    CkMime_Dispose(mime);
    CkMime_Dispose(part2);
    CkByteData_Dispose(binaryData);
    CkFileAccess_Dispose(fac);

    }