Unicode C++

Save All MIME Attachments to Files

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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Unicode C++

#include <CkMimeW.h>
#include <CkStringTableW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkMimeW mime;
    success = mime.LoadMimeFile(L"qa_data/multipart_message.eml");
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        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.
    CkStringTableW savedFiles;
    success = mime.PartsToFiles(L"qa_output/attachments",savedFiles);
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

    int n = savedFiles.get_Count();
    wprintf(L"Saved %d files:\n",n);
    int i;
    for (i = 0; i <= n - 1; i++) {
        const wchar_t *name = savedFiles.stringAt(i);
        if (savedFiles.get_LastMethodSuccess() == false) {
            wprintf(L"%s\n",savedFiles.lastErrorText());
            return;
        }

        wprintf(L"%s\n",name);
    }
    }