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removeattach.c
102 lines (77 loc) · 2.6 KB
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removeattach.c
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/*
removeattach - Remove all attachments from a MIME encoded message
PREPREQUISITES: glib-2.0, gmime-2.4, zlib
TO BUILD: gcc `pkg-config --cflags --libs glib-2.0` `pkg-config --cflags --libs gmime-2.4` removeattach.c -o removeattach
TO RUN: pipe mime encoded e-mail message from procmailrc to
removeattach.
*/
#include <stdio.h>
#include <glib.h>
#include <gmime/gmime.h>
int is_attachment(GMimeObject *part) {
if (g_mime_object_get_content_disposition_parameter(part, "filename") ||
g_mime_object_get_content_type_parameter(part, "name"))
return 1;
else
return 0;
}
int remove_part(GMimeObject *parent, GMimeObject *part) {
int attachment = is_attachment(part);
if (attachment && GMIME_IS_MULTIPART(parent)) {
g_mime_multipart_remove((GMimeMultipart*)parent, part);
return 1;
}
else if (attachment && GMIME_IS_MESSAGE(parent)) { // I'm not sure if this could ever occur or even makes sense.
GMimePart *new_part;
new_part = g_mime_part_new_with_type("text", "plain");
g_mime_part_set_content_object(new_part,
g_mime_data_wrapper_new_with_stream(g_mime_stream_mem_new_with_buffer("Attachment Removed.", 19),
GMIME_CONTENT_ENCODING_DEFAULT));
g_mime_message_set_mime_part((GMimeMessage*)parent, (GMimeObject*)new_part);
g_object_unref(part);
}
else if (GMIME_IS_MESSAGE_PART(part)) {
remove_message(g_mime_message_part_get_message((GMimeMessagePart*)part));
}
return 0;
}
void remove_multipart(GMimeMultipart *multipart) {
int i=0;
while (i < g_mime_multipart_get_count(multipart)) {
int removed = remove_part((GMimeObject*)multipart, g_mime_multipart_get_part(multipart, i));
if (!removed)
i++;
}
}
void remove_message(GMimeMessage *message) {
GMimeObject *part;
part = g_mime_message_get_mime_part(message);
if (GMIME_IS_MULTIPART(part))
remove_multipart((GMimeMultipart*)part);
else
remove_part((GMimeObject*)message, part);
}
int main(int argc, char **argv) {
GByteArray *garray;
GMimeStream *stream;
GMimeParser *parse;
GMimeMessage *message;
char buf[1];
int len;
g_mime_init(0);
garray = g_byte_array_new();
while (!feof(stdin)) {
len = fread(buf, 1, 1, stdin);
if (len == 1)
g_byte_array_append(garray, buf, len);
}
stream = g_mime_stream_mem_new_with_byte_array(garray);
parse = g_mime_parser_new_with_stream(stream);
message = g_mime_parser_construct_message(parse);
remove_message(message);
printf(g_mime_object_to_string((GMimeObject*)message));
g_object_unref(message);
g_object_unref(parse);
g_object_unref(stream);
return 0;
}