Save All MIME Attachments to Files

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Demonstrates the Chilkat Mime.PartsToFiles method, which recursively traverses the MIME tree and saves each part having a nonempty filename parameter to a directory. The first argument is the destination directory and the second is a StringTable that receives the saved filenames.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This extracts every named attachment from a message in one call, walking the whole tree so it finds attachments nested inside multipart containers. It saves only parts that declare a filename — inline body parts without one are skipped — and reports what it wrote via the StringTable, which is handy for logging or follow-up processing. The destination directory must already exist.

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#include <C_CkMime.h>
#include <C_CkStringTable.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMime mime;
    HCkStringTable savedFiles;
    int n;
    int i;
    const char *name;

    success = FALSE;

    mime = CkMime_Create();
    success = CkMime_LoadMimeFile(mime,"qa_data/multipart_message.eml");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        CkMime_Dispose(mime);
        return;
    }

    //  Recursively traverse the MIME tree and save each part that has a nonempty "filename" parameter
    //  to a directory.  The 1st argument is the destination directory and the 2nd is a StringTable
    //  that receives the saved filenames.
    savedFiles = CkStringTable_Create();
    success = CkMime_PartsToFiles(mime,"qa_output/attachments",savedFiles);
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        CkMime_Dispose(mime);
        CkStringTable_Dispose(savedFiles);
        return;
    }

    n = CkStringTable_getCount(savedFiles);
    printf("Saved %d files:\n",n);

    for (i = 0; i <= n - 1; i++) {
        name = CkStringTable_stringAt(savedFiles,i);
        if (CkStringTable_getLastMethodSuccess(savedFiles) == FALSE) {
            printf("%s\n",CkStringTable_lastErrorText(savedFiles));
            CkMime_Dispose(mime);
            CkStringTable_Dispose(savedFiles);
            return;
        }

        printf("%s\n",name);
    }



    CkMime_Dispose(mime);
    CkStringTable_Dispose(savedFiles);

    }