Tcl

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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Tcl


load ./chilkat.dll

set success 0

set mime [new_CkMime]

set success [CkMime_LoadMimeFile $mime "qa_data/multipart_message.eml"]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    exit
}

#  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.
set savedFiles [new_CkStringTable]

set success [CkMime_PartsToFiles $mime "qa_output/attachments" $savedFiles]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    delete_CkStringTable $savedFiles
    exit
}

set n [CkStringTable_get_Count $savedFiles]
puts "Saved $n files:"

for {set i 0} {$i <= [expr $n - 1]} {incr i} {
    set name [CkStringTable_stringAt $savedFiles $i]
    if {[CkStringTable_get_LastMethodSuccess $savedFiles] == 0} then {
        puts [CkStringTable_lastErrorText $savedFiles]
        delete_CkMime $mime
        delete_CkStringTable $savedFiles
        exit
    }

    puts "$name"
}

delete_CkMime $mime
delete_CkStringTable $savedFiles