Modify Content-Disposition Header Fields in MIME

Demonstrates how to edit the Content-Disposition header in MIME sub-parts.

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#include <CkMime.h>
#include <CkString.h>

void ChilkatSample(void)
    {

    //  The intent of this example is to modify Content-Disposition
    //  header fields from this:
    // 
    //  Content-Disposition: attachment; filename="a4 manuscript.pdf"; size=0;
    //  	creation-date="Thu, 12 Apr 2007 06:39:10 GMT";
    //  	modification-date="Thu, 12 Apr 2007 06:39:10 GMT"
    // 
    //  to this:
    // 
    //  content-disposition: attachment;
    //  	 filename="a4 manuscript.pdf"
    // 

    CkMime mime;

    bool success;
    success = mime.UnlockComponent("Anything for 30-day trial");
    if (success == false) {
        printf("Failed to unlock\n");
        return;
    }

    success = mime.LoadMimeFile("testMime.txt");
    if (success == false) {
        printf("%s\n",mime.lastErrorText());
        return;
    }

    //  This example assumes the header fields to be modified
    //  are located directly beneath the top-level MIME part.
    int numParts;
    numParts = mime.get_NumParts();

    int i;
    CkMime *mimePart = 0;

    CkString filename;
    CkString disposition;

    for (i = 0; i <= numParts - 1; i++) {
        mimePart = mime.GetPart(i);

        disposition = mimePart->disposition();
        if (disposition == "attachment") {
            filename = mimePart->filename();
            //  AddHeaderField replaces the existing field if it already exists.
            //  Discard the contents of the existing Content-Disposition
            //  and replace it with "attachment".
            mimePart->AddHeaderField("content-disposition","attachment");

            //  Now add the filename attribute:
            mimePart->put_Filename(filename);
        }

        delete mimePart;
    }

    success = mime.SaveMime("modifiedMime.txt");


    }