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mu/lib/mu-msg-part.cc

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/*
** Copyright (C) 2008-2020 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
**
** This program is free software; you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by the
** Free Software Foundation; either version 3, or (at your option) any
** later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software Foundation,
** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**
*/
#include "config.h"
#include <string.h>
#include <unistd.h>
#include "mu-msg.hh"
#include "utils/mu-util.h"
#include "utils/mu-str.h"
#include "mu-msg-priv.hh"
#include "mu-msg-part.hh"
using namespace Mu;
struct _DoData {
GMimeObject* mime_obj;
unsigned index;
};
typedef struct _DoData DoData;
static void
do_it_with_index(MuMsg* msg, MuMsgPart* part, DoData* ddata)
{
if (ddata->mime_obj)
return;
if (part->index == ddata->index) {
/* Add a reference to this object, this way if it is
* encrypted it will not be garbage collected before
* we are done with it. */
g_object_ref(part->data);
ddata->mime_obj = (GMimeObject*)part->data;
}
}
static GMimeObject*
get_mime_object_at_index(MuMsg* msg, MuMsgOptions opts, unsigned index)
{
DoData ddata;
ddata.mime_obj = NULL;
ddata.index = index;
/* wipe out some irrelevant options */
opts &= (MuMsgOptions)~MU_MSG_OPTION_VERIFY;
opts &= ~MU_MSG_OPTION_EXTRACT_IMAGES;
mu_msg_part_foreach(msg, opts, (MuMsgPartForeachFunc)do_it_with_index, &ddata);
return ddata.mime_obj;
}
typedef gboolean (*MuMsgPartMatchFunc)(MuMsgPart*, gpointer);
struct _MatchData {
MuMsgPartMatchFunc match_func;
gpointer user_data;
int index;
};
typedef struct _MatchData MatchData;
static void
check_match(MuMsg* msg, MuMsgPart* part, MatchData* mdata)
{
if (mdata->index != -1)
return;
if (mdata->match_func(part, mdata->user_data))
mdata->index = part->index;
}
static int
get_matching_part_index(MuMsg* msg, MuMsgOptions opts, MuMsgPartMatchFunc func, gpointer user_data)
{
MatchData mdata;
mdata.match_func = func;
mdata.user_data = user_data;
mdata.index = -1;
mu_msg_part_foreach(msg, opts, (MuMsgPartForeachFunc)check_match, &mdata);
return mdata.index;
}
static void
accumulate_text_message(MuMsg* msg, MuMsgPart* part, GString** gstrp)
{
const gchar* str;
char* adrs;
GMimeMessage* mimemsg;
InternetAddressList* addresses;
/* put sender, recipients and subject in the string, so they
* can be indexed as well */
mimemsg = GMIME_MESSAGE(part->data);
addresses = g_mime_message_get_addresses(mimemsg, GMIME_ADDRESS_TYPE_FROM);
adrs = internet_address_list_to_string(addresses, NULL, FALSE);
g_string_append_printf(*gstrp, "%s%s", adrs ? adrs : "", adrs ? "\n" : "");
g_free(adrs);
str = g_mime_message_get_subject(mimemsg);
g_string_append_printf(*gstrp, "%s%s", str ? str : "", str ? "\n" : "");
addresses = g_mime_message_get_all_recipients(mimemsg);
adrs = internet_address_list_to_string(addresses, NULL, FALSE);
g_object_unref(addresses);
g_string_append_printf(*gstrp, "%s%s", adrs ? adrs : "", adrs ? "\n" : "");
g_free(adrs);
}
static void
accumulate_text_part(MuMsg* msg, MuMsgPart* part, GString** gstrp)
{
GMimeContentType* ctype;
gboolean err;
char* txt;
ctype = g_mime_object_get_content_type((GMimeObject*)part->data);
if (!g_mime_content_type_is_type(ctype, "text", "plain"))
return; /* not plain text */
txt = mu_msg_mime_part_to_string((GMimePart*)part->data, &err);
if (txt)
g_string_append(*gstrp, txt);
g_free(txt);
}
static void
accumulate_text(MuMsg* msg, MuMsgPart* part, GString** gstrp)
{
if (GMIME_IS_MESSAGE(part->data))
accumulate_text_message(msg, part, gstrp);
else if (GMIME_IS_PART(part->data))
accumulate_text_part(msg, part, gstrp);
}
/* declaration, so we can use it earlier */
static gboolean handle_mime_object(MuMsg* msg,
GMimeObject* mobj,
GMimeObject* parent,
MuMsgOptions opts,
unsigned* index,
gboolean decrypted,
MuMsgPartForeachFunc func,
gpointer user_data);
static char*
get_text_from_mime_msg(MuMsg* msg, GMimeMessage* mmsg, MuMsgOptions opts)
{
GString* gstr;
unsigned index;
index = 1;
gstr = g_string_sized_new(4096);
handle_mime_object(msg,
mmsg->mime_part,
(GMimeObject*)mmsg,
opts,
&index,
FALSE,
(MuMsgPartForeachFunc)accumulate_text,
&gstr);
return g_string_free(gstr, FALSE);
}
char*
Mu::mu_msg_part_get_text(MuMsg* msg, MuMsgPart* self, MuMsgOptions opts)
{
GMimeObject* mobj;
GMimeMessage* mime_msg;
gboolean err;
g_return_val_if_fail(msg, NULL);
g_return_val_if_fail(self && GMIME_IS_OBJECT(self->data), NULL);
mobj = (GMimeObject*)self->data;
err = FALSE;
if (GMIME_IS_PART(mobj)) {
if (self->part_type & MU_MSG_PART_TYPE_TEXT_PLAIN)
return mu_msg_mime_part_to_string((GMimePart*)mobj, &err);
else
return NULL; /* non-text MimePart */
}
mime_msg = NULL;
if (GMIME_IS_MESSAGE_PART(mobj))
mime_msg = g_mime_message_part_get_message((GMimeMessagePart*)mobj);
else if (GMIME_IS_MESSAGE(mobj))
mime_msg = (GMimeMessage*)mobj;
/* apparently, g_mime_message_part_get_message may still
* return NULL */
if (mime_msg)
return get_text_from_mime_msg(msg, mime_msg, opts);
return NULL;
}
/* note: this will return -1 in case of error or if the size is
* unknown */
static ssize_t
get_part_size(GMimePart* part)
{
GMimeDataWrapper* wrapper;
GMimeStream* stream;
wrapper = g_mime_part_get_content(part);
if (!GMIME_IS_DATA_WRAPPER(wrapper))
return -1;
stream = g_mime_data_wrapper_get_stream(wrapper);
if (!stream)
return -1; /* no stream -> size is 0 */
else
return g_mime_stream_length(stream);
/* NOTE: stream/wrapper are owned by gmime, no unreffing */
}
static char*
cleanup_filename(char* fname)
{
GString* gstr;
gchar* cur;
gunichar uc;
gstr = g_string_sized_new(strlen(fname));
/* replace control characters, slashes, and colons by '-' */
for (cur = fname; cur && *cur; cur = g_utf8_next_char(cur)) {
uc = g_utf8_get_char(cur);
if (g_unichar_iscntrl(uc) || uc == '/' || uc == ':' || uc == ';')
g_string_append_unichar(gstr, '-');
else
g_string_append_unichar(gstr, uc);
}
g_free(fname);
return g_string_free(gstr, FALSE);
}
/*
* when a part doesn't have a filename, it can be useful to 'guess' one based on
* its mime-type, which allows other tools to handle them correctly, e.g. from
* mu4e.
*
* For now, we only handle calendar invitations in that way, but others may
* follow.
*/
static char*
guess_file_name(GMimeObject* mobj, unsigned index)
{
GMimeContentType* ctype;
ctype = g_mime_object_get_content_type(mobj);
/* special case for calendars; map to '.vcs' */
if (g_mime_content_type_is_type(ctype, "text", "calendar"))
return g_strdup_printf("vcal-%u.vcs", index);
/* fallback */
return g_strdup_printf("%u.msgpart", index);
}
static char*
mime_part_get_filename(GMimeObject* mobj, unsigned index, gboolean construct_if_needed)
{
gchar* fname;
fname = NULL;
if (GMIME_IS_PART(mobj)) {
/* the easy case: the part has a filename */
fname = (gchar*)g_mime_part_get_filename(GMIME_PART(mobj));
if (fname) /* don't include directory components */
fname = g_path_get_basename(fname);
}
if (!fname && !construct_if_needed)
return NULL;
if (GMIME_IS_MESSAGE_PART(mobj)) {
GMimeMessage* msg;
const char* subj;
msg = g_mime_message_part_get_message(GMIME_MESSAGE_PART(mobj));
subj = g_mime_message_get_subject(msg);
fname = g_strdup_printf("%s.eml", subj ? subj : "message");
}
if (!fname)
fname = guess_file_name(mobj, index);
/* replace control characters, slashes, and colons */
fname = cleanup_filename(fname);
return fname;
}
char*
Mu::mu_msg_part_get_filename(MuMsgPart* mpart, gboolean construct_if_needed)
{
g_return_val_if_fail(mpart, NULL);
g_return_val_if_fail(GMIME_IS_OBJECT(mpart->data), NULL);
return mime_part_get_filename((GMimeObject*)mpart->data, mpart->index, construct_if_needed);
}
const gchar*
Mu::mu_msg_part_get_content_id(MuMsgPart* mpart)
{
g_return_val_if_fail(mpart, NULL);
g_return_val_if_fail(GMIME_IS_OBJECT(mpart->data), NULL);
return g_mime_object_get_content_id((GMimeObject*)mpart->data);
}
static MuMsgPartType
get_disposition(GMimeObject* mobj)
{
const char* disp;
disp = g_mime_object_get_disposition(mobj);
if (!disp)
return MU_MSG_PART_TYPE_NONE;
if (strcasecmp(disp, GMIME_DISPOSITION_ATTACHMENT) == 0)
return MU_MSG_PART_TYPE_ATTACHMENT;
if (strcasecmp(disp, GMIME_DISPOSITION_INLINE) == 0)
return MU_MSG_PART_TYPE_INLINE;
return MU_MSG_PART_TYPE_NONE;
}
/* call 'func' with information about this MIME-part */
static inline void
check_signature(MuMsg* msg, GMimeMultipartSigned* part, MuMsgOptions opts)
{
GError* err;
err = NULL;
mu_msg_crypto_verify_part(part, opts, &err);
if (err) {
g_warning("error verifying signature: %s", err->message);
g_clear_error(&err);
}
}
/* Note: this is function will be called by GMime when it needs a
* password. However, GMime <= 2.6.10 does not handle
* getting passwords correctly, so this might fail. see:
* password_requester in mu-msg-crypto.c */
static gchar*
get_console_pw(const char* user_id, const char* prompt_ctx, gboolean reprompt, gpointer user_data)
{
char *prompt, *pass;
if (!g_mime_check_version(2, 6, 11))
g_printerr("*** the gmime library you are using has version "
"%u.%u.%u (<= 2.6.10)\n"
"*** this version has a bug in its password "
"retrieval routine, and probably won't work.\n",
gmime_major_version,
gmime_minor_version,
gmime_micro_version);
if (reprompt)
g_print("Authentication failed. Please try again\n");
prompt = g_strdup_printf("Password for %s: ", user_id);
pass = mu_util_read_password(prompt);
g_free(prompt);
return pass;
}
static gboolean
handle_encrypted_part(MuMsg* msg,
GMimeMultipartEncrypted* part,
MuMsgOptions opts,
unsigned* index,
MuMsgPartForeachFunc func,
gpointer user_data)
{
GError* err;
gboolean rv;
GMimeObject* dec;
MuMsgPartPasswordFunc pw_func;
if (opts & MU_MSG_OPTION_CONSOLE_PASSWORD)
pw_func = (MuMsgPartPasswordFunc)get_console_pw;
else
pw_func = NULL;
err = NULL;
dec = mu_msg_crypto_decrypt_part(part, opts, pw_func, NULL, &err);
if (err) {
g_warning("error decrypting part: %s", err->message);
g_clear_error(&err);
}
if (dec) {
rv = handle_mime_object(msg,
dec,
(GMimeObject*)part,
opts,
index,
TRUE,
func,
user_data);
g_object_unref(dec);
} else {
/* On failure to decrypt, list the encrypted part as
* an attachment
*/
GMimeObject* encrypted;
encrypted = g_mime_multipart_get_part(GMIME_MULTIPART(part), 1);
g_return_val_if_fail(GMIME_IS_PART(encrypted), FALSE);
rv = handle_mime_object(msg,
encrypted,
(GMimeObject*)part,
opts,
index,
FALSE,
func,
user_data);
}
return rv;
}
static gboolean
looks_like_text_body_part(GMimeContentType* ctype)
{
unsigned u;
static struct {
const char* type;
const char* subtype;
} types[] = {
{"text", "plain"},
{"text", "x-markdown"},
{"text", "x-diff"},
{"text", "x-patch"},
{"application", "x-patch"}
/* possible other types */
};
for (u = 0; u != G_N_ELEMENTS(types); ++u)
if (g_mime_content_type_is_type(ctype, types[u].type, types[u].subtype))
return TRUE;
return FALSE;
}
static MuMsgPartSigStatusReport*
copy_status_report_maybe(GObject* obj)
{
MuMsgPartSigStatusReport *report, *copy;
report = (MuMsgPartSigStatusReport*)g_object_get_data(obj, SIG_STATUS_REPORT);
if (!report)
return NULL; /* nothing to copy */
copy = g_slice_new0(MuMsgPartSigStatusReport);
copy->verdict = report->verdict;
if (report->report)
copy->report = g_strdup(report->report);
if (report->signers)
copy->signers = g_strdup(report->signers);
return copy;
}
/* call 'func' with information about this MIME-part */
static gboolean
handle_part(MuMsg* msg,
GMimePart* part,
GMimeObject* parent,
MuMsgOptions opts,
unsigned* index,
gboolean decrypted,
MuMsgPartForeachFunc func,
gpointer user_data)
{
GMimeContentType* ct;
MuMsgPart msgpart;
memset(&msgpart, 0, sizeof(MuMsgPart));
msgpart.size = get_part_size(part);
msgpart.part_type = MU_MSG_PART_TYPE_LEAF;
msgpart.part_type |= get_disposition((GMimeObject*)part);
if (decrypted)
msgpart.part_type |= MU_MSG_PART_TYPE_DECRYPTED;
else if ((opts & MU_MSG_OPTION_DECRYPT) && GMIME_IS_MULTIPART_ENCRYPTED(parent))
msgpart.part_type |= MU_MSG_PART_TYPE_ENCRYPTED;
ct = g_mime_object_get_content_type((GMimeObject*)part);
if (GMIME_IS_CONTENT_TYPE(ct)) {
msgpart.type = g_mime_content_type_get_media_type(ct);
msgpart.subtype = g_mime_content_type_get_media_subtype(ct);
/* store in the part_type as well, for quick checking */
if (looks_like_text_body_part(ct))
msgpart.part_type |= MU_MSG_PART_TYPE_TEXT_PLAIN;
else if (g_mime_content_type_is_type(ct, "text", "html"))
msgpart.part_type |= MU_MSG_PART_TYPE_TEXT_HTML;
}
/* put the verification info in the pgp-signature and every
* descendent of a pgp-encrypted part */
msgpart.sig_status_report = NULL;
if (g_ascii_strcasecmp(msgpart.subtype, "pgp-signature") == 0 || decrypted) {
msgpart.sig_status_report = copy_status_report_maybe(G_OBJECT(parent));
if (msgpart.sig_status_report)
msgpart.part_type |= MU_MSG_PART_TYPE_SIGNED;
}
msgpart.data = (gpointer)part;
msgpart.index = (*index)++;
func(msg, &msgpart, user_data);
mu_msg_part_sig_status_report_destroy(msgpart.sig_status_report);
return TRUE;
}
/* call 'func' with information about this MIME-part */
static gboolean
handle_message_part(MuMsg* msg,
GMimeMessagePart* mimemsgpart,
GMimeObject* parent,
MuMsgOptions opts,
unsigned* index,
gboolean decrypted,
MuMsgPartForeachFunc func,
gpointer user_data)
{
MuMsgPart msgpart;
memset(&msgpart, 0, sizeof(MuMsgPart));
msgpart.type = "message";
msgpart.subtype = "rfc822";
msgpart.index = (*index)++;
/* msgpart.size = 0; /\* maybe calculate this? *\/ */
msgpart.part_type = MU_MSG_PART_TYPE_MESSAGE;
msgpart.part_type |= get_disposition((GMimeObject*)mimemsgpart);
msgpart.data = (gpointer)mimemsgpart;
func(msg, &msgpart, user_data);
if (opts & MU_MSG_OPTION_RECURSE_RFC822) {
GMimeMessage* mmsg; /* may return NULL for some
* messages */
mmsg = g_mime_message_part_get_message(mimemsgpart);
if (mmsg)
return handle_mime_object(msg,
mmsg->mime_part,
parent,
opts,
index,
decrypted,
func,
user_data);
}
return TRUE;
}
static gboolean
handle_multipart(MuMsg* msg,
GMimeMultipart* mpart,
GMimeObject* parent,
MuMsgOptions opts,
unsigned* index,
gboolean decrypted,
MuMsgPartForeachFunc func,
gpointer user_data)
{
gboolean res;
GMimeObject* part;
guint i;
res = TRUE;
for (i = 0; i < mpart->children->len; i++) {
part = (GMimeObject*)mpart->children->pdata[i];
res &=
handle_mime_object(msg, part, parent, opts, index, decrypted, func, user_data);
}
return res;
}
static gboolean
handle_mime_object(MuMsg* msg,
GMimeObject* mobj,
GMimeObject* parent,
MuMsgOptions opts,
unsigned* index,
gboolean decrypted,
MuMsgPartForeachFunc func,
gpointer user_data)
{
if (GMIME_IS_PART(mobj))
return handle_part(msg,
GMIME_PART(mobj),
parent,
opts,
index,
decrypted,
func,
user_data);
else if (GMIME_IS_MESSAGE_PART(mobj))
return handle_message_part(msg,
GMIME_MESSAGE_PART(mobj),
parent,
opts,
index,
decrypted,
func,
user_data);
else if ((opts & MU_MSG_OPTION_VERIFY) && GMIME_IS_MULTIPART_SIGNED(mobj)) {
check_signature(msg, GMIME_MULTIPART_SIGNED(mobj), opts);
return handle_multipart(msg,
GMIME_MULTIPART(mobj),
mobj,
opts,
index,
decrypted,
func,
user_data);
} else if ((opts & MU_MSG_OPTION_DECRYPT) && GMIME_IS_MULTIPART_ENCRYPTED(mobj))
return handle_encrypted_part(msg,
GMIME_MULTIPART_ENCRYPTED(mobj),
opts,
index,
func,
user_data);
else if (GMIME_IS_MULTIPART(mobj))
return handle_multipart(msg,
GMIME_MULTIPART(mobj),
parent,
opts,
index,
decrypted,
func,
user_data);
return TRUE;
}
gboolean
Mu::mu_msg_part_foreach(MuMsg* msg,
MuMsgOptions opts,
MuMsgPartForeachFunc func,
gpointer user_data)
{
unsigned index;
index = 1;
g_return_val_if_fail(msg, FALSE);
if (!mu_msg_load_msg_file(msg, NULL))
return FALSE;
return handle_mime_object(msg,
msg->_file->_mime_msg->mime_part,
(GMimeObject*)msg->_file->_mime_msg,
opts,
&index,
FALSE,
func,
user_data);
}
static gboolean
write_part_to_fd(GMimePart* part, int fd, GError** err)
{
GMimeStream* stream;
GMimeDataWrapper* wrapper;
gboolean rv;
stream = g_mime_stream_fs_new(fd);
if (!GMIME_IS_STREAM(stream)) {
g_set_error(err, MU_ERROR_DOMAIN, MU_ERROR_GMIME, "failed to create stream");
return FALSE;
}
g_mime_stream_fs_set_owner(GMIME_STREAM_FS(stream), FALSE);
wrapper = g_mime_part_get_content(part);
if (!GMIME_IS_DATA_WRAPPER(wrapper)) {
g_set_error(err, MU_ERROR_DOMAIN, MU_ERROR_GMIME, "failed to create wrapper");
g_object_unref(stream);
return FALSE;
}
g_object_ref(part); /* FIXME: otherwise, the unrefs below
* give errors...*/
if (g_mime_data_wrapper_write_to_stream(wrapper, stream) == -1) {
rv = FALSE;
g_set_error(err, MU_ERROR_DOMAIN, MU_ERROR_GMIME, "failed to write to stream");
} else
rv = TRUE;
/* g_object_unref (wrapper); we don't own it */
g_object_unref(stream);
return rv;
}
static gboolean
write_object_to_fd(GMimeObject* obj, int fd, GError** err)
{
gchar* str;
str = g_mime_object_to_string(obj, NULL);
if (!str) {
g_set_error(err,
MU_ERROR_DOMAIN,
MU_ERROR_GMIME,
"could not get string from object");
return FALSE;
}
if (write(fd, str, strlen(str)) == -1) {
g_set_error(err,
MU_ERROR_DOMAIN,
MU_ERROR_GMIME,
"failed to write object: %s",
g_strerror(errno));
return FALSE;
}
return TRUE;
}
static gboolean
save_object(GMimeObject* obj, MuMsgOptions opts, const char* fullpath, GError** err)
{
int fd;
gboolean rv;
gboolean use_existing, overwrite;
use_existing = opts & MU_MSG_OPTION_USE_EXISTING;
overwrite = opts & MU_MSG_OPTION_OVERWRITE;
/* don't try to overwrite when we already have it; useful when
* you're sure it's not a different file with the same name */
if (use_existing && access(fullpath, F_OK) == 0)
return TRUE;
/* ok, try to create the file */
fd = mu_util_create_writeable_fd(fullpath, 0600, overwrite);
if (fd == -1) {
g_set_error(err,
MU_ERROR_DOMAIN,
MU_ERROR_FILE,
"could not open '%s' for writing: %s",
fullpath,
errno ? g_strerror(errno) : "error");
return FALSE;
}
if (GMIME_IS_PART(obj))
rv = write_part_to_fd((GMimePart*)obj, fd, err);
else
rv = write_object_to_fd(obj, fd, err);
if (close(fd) != 0 && !err) { /* don't write on top of old err */
g_set_error(err,
MU_ERROR_DOMAIN,
MU_ERROR_FILE,
"could not close '%s': %s",
fullpath,
errno ? g_strerror(errno) : "error");
return FALSE;
}
return rv;
}
gchar*
Mu::mu_msg_part_get_path(MuMsg* msg,
MuMsgOptions opts,
const char* targetdir,
unsigned index,
GError** err)
{
char * fname, *filepath;
GMimeObject* mobj;
g_return_val_if_fail(msg, NULL);
if (!mu_msg_load_msg_file(msg, NULL))
return NULL;
mobj = get_mime_object_at_index(msg, opts, index);
if (!mobj) {
mu_util_g_set_error(err, MU_ERROR_GMIME, "cannot find part %u", index);
return NULL;
}
fname = mime_part_get_filename(mobj, index, TRUE);
filepath = g_build_path(G_DIR_SEPARATOR_S, targetdir ? targetdir : "", fname, NULL);
/* Unref it since it was referenced earlier by
* get_mime_object_at_index */
g_object_unref(mobj);
g_free(fname);
return filepath;
}
gchar*
Mu::mu_msg_part_get_cache_path(MuMsg* msg, MuMsgOptions opts, guint partid, GError** err)
{
char * dirname, *filepath;
const char* path;
g_return_val_if_fail(msg, NULL);
if (!mu_msg_load_msg_file(msg, NULL))
return NULL;
path = mu_msg_get_path(msg);
/* g_compute_checksum_for_string may be better, but requires
* rel. new glib (2.16) */
dirname = g_strdup_printf("%s%c%x%c%u",
mu_util_cache_dir(),
G_DIR_SEPARATOR,
g_str_hash(path),
G_DIR_SEPARATOR,
partid);
if (!mu_util_create_dir_maybe(dirname, 0700, FALSE)) {
mu_util_g_set_error(err, MU_ERROR_FILE, "failed to create dir %s", dirname);
g_free(dirname);
return NULL;
}
filepath = mu_msg_part_get_path(msg, opts, dirname, partid, err);
g_free(dirname);
return filepath;
}
gboolean
Mu::mu_msg_part_save(MuMsg* msg,
MuMsgOptions opts,
const char* fullpath,
guint partidx,
GError** err)
{
gboolean rv;
GMimeObject* part;
g_return_val_if_fail(msg, FALSE);
g_return_val_if_fail(fullpath, FALSE);
g_return_val_if_fail(
!((opts & MU_MSG_OPTION_OVERWRITE) && (opts & MU_MSG_OPTION_USE_EXISTING)),
FALSE);
rv = FALSE;
if (!mu_msg_load_msg_file(msg, err))
return rv;
part = get_mime_object_at_index(msg, opts, partidx);
/* special case: convert a message-part into a message */
if (GMIME_IS_MESSAGE_PART(part))
part = (GMimeObject*)g_mime_message_part_get_message(GMIME_MESSAGE_PART(part));
if (!part)
g_set_error(err,
MU_ERROR_DOMAIN,
MU_ERROR_GMIME,
"part %u does not exist",
partidx);
else if (!GMIME_IS_PART(part) && !GMIME_IS_MESSAGE(part))
g_set_error(err,
MU_ERROR_DOMAIN,
MU_ERROR_GMIME,
"unexpected type %s for part %u",
G_OBJECT_TYPE_NAME((GObject*)part),
partidx);
else
rv = save_object(part, opts, fullpath, err);
g_clear_object(&part);
return rv;
}
gchar*
Mu::mu_msg_part_save_temp(MuMsg* msg, MuMsgOptions opts, guint partidx, GError** err)
{
gchar* filepath;
filepath = mu_msg_part_get_cache_path(msg, opts, partidx, err);
if (!filepath)
return NULL;
if (!mu_msg_part_save(msg, opts, filepath, partidx, err)) {
g_free(filepath);
return NULL;
}
return filepath;
}
static gboolean
match_cid(MuMsgPart* mpart, const char* cid)
{
const char* this_cid;
this_cid = g_mime_object_get_content_id((GMimeObject*)mpart->data);
return g_strcmp0(this_cid, cid) ? TRUE : FALSE;
}
int
Mu::mu_msg_find_index_for_cid(MuMsg* msg, MuMsgOptions opts, const char* sought_cid)
{
const char* cid;
g_return_val_if_fail(msg, -1);
g_return_val_if_fail(sought_cid, -1);
if (!mu_msg_load_msg_file(msg, NULL))
return -1;
cid = g_str_has_prefix(sought_cid, "cid:") ? sought_cid + 4 : sought_cid;
return get_matching_part_index(msg, opts, (MuMsgPartMatchFunc)match_cid, (gpointer)cid);
}
struct _RxMatchData {
GSList* _lst;
const GRegex* _rx;
guint _idx;
};
typedef struct _RxMatchData RxMatchData;
static void
match_filename_rx(MuMsg* msg, MuMsgPart* mpart, RxMatchData* mdata)
{
char* fname;
fname = mu_msg_part_get_filename(mpart, FALSE);
if (!fname)
return;
if (g_regex_match(mdata->_rx, fname, (GRegexMatchFlags)0, NULL))
mdata->_lst = g_slist_prepend(mdata->_lst, GUINT_TO_POINTER(mpart->index));
g_free(fname);
}
GSList*
Mu::mu_msg_find_files(MuMsg* msg, MuMsgOptions opts, const GRegex* pattern)
{
RxMatchData mdata;
g_return_val_if_fail(msg, NULL);
g_return_val_if_fail(pattern, NULL);
if (!mu_msg_load_msg_file(msg, NULL))
return NULL;
mdata._lst = NULL;
mdata._rx = pattern;
mdata._idx = 0;
mu_msg_part_foreach(msg, opts, (MuMsgPartForeachFunc)match_filename_rx, &mdata);
return mdata._lst;
}
gboolean
Mu::mu_msg_part_maybe_attachment(MuMsgPart* part)
{
g_return_val_if_fail(part, FALSE);
/* attachments must be leaf parts */
if (!(part->part_type & MU_MSG_PART_TYPE_LEAF))
return FALSE;
/* parts other than text/plain, text/html are considered
* attachments as well */
if (!(part->part_type & MU_MSG_PART_TYPE_TEXT_PLAIN) &&
!(part->part_type & MU_MSG_PART_TYPE_TEXT_HTML))
return TRUE;
return part->part_type & MU_MSG_PART_TYPE_ATTACHMENT ? TRUE : FALSE;
}
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