(C) Download and Save Email Attachments (POP3)

See more POP3 Examples

Downloads emails from a POP3 mailbox and saves all attachments.

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#include <C_CkMailMan.h>
#include <C_CkEmailBundle.h>
#include <C_CkEmail.h>

void ChilkatSample(void)
    {
    HCkMailMan mailman;
    HCkEmailBundle bundle;
    const char *dirPath;
    BOOL success;
    int bundleIndex;
    int numMessages;
    HCkEmail email;
    int numAttachments;
    int attachIndex;

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

    // The mailman object is used for receiving (POP3) 
    // and sending (SMTP) email.
    mailman = CkMailMan_Create();

    // Set the POP3 server's hostname
    CkMailMan_putMailHost(mailman,"pop.yourserver.com");

    // Set the POP3 login/password.
    CkMailMan_putPopUsername(mailman,"***");
    CkMailMan_putPopPassword(mailman,"***");

    // Copy the all email from the user's POP3 mailbox 
    // into a bundle object.  The email remains on the server.
    // CopyMail is a reasonable choice for POP3 maildrops that don't have too many
    // emails. For larger mail drops, one might download emails one at a time..
    bundle = CkMailMan_CopyMail(mailman);
    if (CkMailMan_getLastMethodSuccess(mailman) != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkMailMan_Dispose(mailman);
        return;
    }

    // The directory path can be relative or absolute.
    // This shows a Windows style directory path.  On other operating systems, the path
    // would be different..
    dirPath = "c:/myAttachments";

    bundleIndex = 0;
    numMessages = CkEmailBundle_getMessageCount(bundle);

    while ((bundleIndex < numMessages)) {
        email = CkEmailBundle_GetEmail(bundle,bundleIndex);

        // Save all attachments to the specified directory.
        // The directory is automatically created if it does not yet exist.
        success = CkEmail_SaveAllAttachments(email,dirPath);
        if (success != TRUE) {
            printf("%s\n",CkEmail_lastErrorText(email));
            CkMailMan_Dispose(mailman);
            return;
        }

        // The OverwriteExisting property controls whether already-existing files
        // are automatically overwritten.  By default, it is set to TRUE so that existing
        // files will be overwritten.

        // Setting OverwriteExisting = FALSE will cause the attachment-saving methods to generate
        // unique filenames if a file with the same name already exists.  The actual filename(s)
        // saved will be present by calling GetAttachmentFilename for each attachment *after*
        // saving.
        // For example...
        CkEmail_putOverwriteExisting(email,FALSE);
        success = CkEmail_SaveAllAttachments(email,dirPath);
        if (success != TRUE) {
            printf("%s\n",CkEmail_lastErrorText(email));
            CkMailMan_Dispose(mailman);
            return;
        }

        numAttachments = CkEmail_getNumAttachments(email);
        attachIndex = 0;
        while ((attachIndex < numAttachments)) {
            // If the attachment filename was changed to prevent overwriting,
            // GetAttachmentFilename will return the new filename.
            printf("%s\n",CkEmail_getAttachmentFilename(email,attachIndex));
            attachIndex = attachIndex + 1;
        }

        // Attachments can also be saved individually.
        attachIndex = 0;
        while ((attachIndex < numAttachments)) {

            printf("Original Filename: %s\n",CkEmail_getAttachmentFilename(email,attachIndex));
            success = CkEmail_SaveAttachedFile(email,attachIndex,dirPath);
            if (success != TRUE) {
                printf("%s\n",CkEmail_lastErrorText(email));
                CkMailMan_Dispose(mailman);
                return;
            }

            // If OverwriteExisting = TRUE, the saved filename will always equal the original filename,
            // unless there are characters present in the filename that are not allowed by Windows,
            // such as * ? < > | etc.  In those cases the illegal characters are either removed or replaced
            // with underscore characters to allow the file to be saved.
            printf("Saved Filename: %s\n",CkEmail_getAttachmentFilename(email,attachIndex));
            attachIndex = attachIndex + 1;
        }

        CkEmail_Dispose(email);

        bundleIndex = bundleIndex + 1;
    }

    CkEmailBundle_Dispose(bundle);


    CkMailMan_Dispose(mailman);

    }