#include "notmuch-private.h"
#include <gmime/gmime.h>
+#include <gmime/gmime-filter.h>
#include <xapian.h>
+/* Oh, how I wish that gobject didn't require so much noisy boilerplate!
+ * (Though I have at least eliminated some of the stock set...) */
+typedef struct _NotmuchFilterDiscardUuencode NotmuchFilterDiscardUuencode;
+typedef struct _NotmuchFilterDiscardUuencodeClass NotmuchFilterDiscardUuencodeClass;
+
+/**
+ * NotmuchFilterDiscardUuencode:
+ *
+ * @parent_object: parent #GMimeFilter
+ * @encode: encoding vs decoding
+ * @state: State of the parser
+ *
+ * A filter to discard uuencoded portions of an email.
+ *
+ * A uuencoded portion is identified as beginning with a line
+ * matching:
+ *
+ * begin [0-7][0-7][0-7] .*
+ *
+ * After that detection, and beginning with the following line,
+ * characters will be discarded as long as the first character of each
+ * line begins with M and subsequent characters on the line are within
+ * the range of ASCII characters from ' ' to '`'.
+ *
+ * This is not a perfect UUencode filter. It's possible to have a
+ * message that will legitimately match that pattern, (so that some
+ * legitimate content is discarded). And for most UUencoded files, the
+ * final line of encoded data (the line not starting with M) will be
+ * indexed.
+ **/
+struct _NotmuchFilterDiscardUuencode {
+ GMimeFilter parent_object;
+ int state;
+};
+
+struct _NotmuchFilterDiscardUuencodeClass {
+ GMimeFilterClass parent_class;
+};
+
+static GMimeFilter *notmuch_filter_discard_uuencode_new (void);
+
+static void notmuch_filter_discard_uuencode_finalize (GObject *object);
+
+static GMimeFilter *filter_copy (GMimeFilter *filter);
+static void filter_filter (GMimeFilter *filter, char *in, size_t len, size_t prespace,
+ char **out, size_t *outlen, size_t *outprespace);
+static void filter_complete (GMimeFilter *filter, char *in, size_t len, size_t prespace,
+ char **out, size_t *outlen, size_t *outprespace);
+static void filter_reset (GMimeFilter *filter);
+
+
+static GMimeFilterClass *parent_class = NULL;
+
+static void
+notmuch_filter_discard_uuencode_class_init (NotmuchFilterDiscardUuencodeClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GMimeFilterClass *filter_class = GMIME_FILTER_CLASS (klass);
+
+ parent_class = (GMimeFilterClass *) g_type_class_ref (GMIME_TYPE_FILTER);
+
+ object_class->finalize = notmuch_filter_discard_uuencode_finalize;
+
+ filter_class->copy = filter_copy;
+ filter_class->filter = filter_filter;
+ filter_class->complete = filter_complete;
+ filter_class->reset = filter_reset;
+}
+
+static void
+notmuch_filter_discard_uuencode_finalize (GObject *object)
+{
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static GMimeFilter *
+filter_copy (GMimeFilter *gmime_filter)
+{
+ (void) gmime_filter;
+ return notmuch_filter_discard_uuencode_new ();
+}
+
+static void
+filter_filter (GMimeFilter *gmime_filter, char *inbuf, size_t inlen, size_t prespace,
+ char **outbuf, size_t *outlen, size_t *outprespace)
+{
+ NotmuchFilterDiscardUuencode *filter = (NotmuchFilterDiscardUuencode *) gmime_filter;
+ register const char *inptr = inbuf;
+ const char *inend = inbuf + inlen;
+ char *outptr;
+
+ (void) prespace;
+
+ /* Simple, linear state-transition diagram for our filter.
+ *
+ * If the character being processed is within the range of [a, b]
+ * for the current state then we transition next_if_match
+ * state. If not, we transition to the next_if_not_match state.
+ *
+ * The final two states are special in that they are the states in
+ * which we discard data. */
+ static const struct {
+ int state;
+ int a;
+ int b;
+ int next_if_match;
+ int next_if_not_match;
+ } states[] = {
+ {0, 'b', 'b', 1, 0},
+ {1, 'e', 'e', 2, 0},
+ {2, 'g', 'g', 3, 0},
+ {3, 'i', 'i', 4, 0},
+ {4, 'n', 'n', 5, 0},
+ {5, ' ', ' ', 6, 0},
+ {6, '0', '7', 7, 0},
+ {7, '0', '7', 8, 0},
+ {8, '0', '7', 9, 0},
+ {9, ' ', ' ', 10, 0},
+ {10, '\n', '\n', 11, 10},
+ {11, 'M', 'M', 12, 0},
+ {12, ' ', '`', 12, 11}
+ };
+ int next;
+
+ g_mime_filter_set_size (gmime_filter, inlen, FALSE);
+ outptr = gmime_filter->outbuf;
+
+ while (inptr < inend) {
+ if (*inptr >= states[filter->state].a &&
+ *inptr <= states[filter->state].b)
+ {
+ next = states[filter->state].next_if_match;
+ }
+ else
+ {
+ next = states[filter->state].next_if_not_match;
+ }
+
+ if (filter->state < 11)
+ *outptr++ = *inptr;
+
+ filter->state = next;
+ inptr++;
+ }
+
+ *outlen = outptr - gmime_filter->outbuf;
+ *outprespace = gmime_filter->outpre;
+ *outbuf = gmime_filter->outbuf;
+}
+
+static void
+filter_complete (GMimeFilter *filter, char *inbuf, size_t inlen, size_t prespace,
+ char **outbuf, size_t *outlen, size_t *outprespace)
+{
+ if (inbuf && inlen)
+ filter_filter (filter, inbuf, inlen, prespace, outbuf, outlen, outprespace);
+}
+
+static void
+filter_reset (GMimeFilter *gmime_filter)
+{
+ NotmuchFilterDiscardUuencode *filter = (NotmuchFilterDiscardUuencode *) gmime_filter;
+
+ filter->state = 0;
+}
+
+/**
+ * notmuch_filter_discard_uuencode_new:
+ *
+ * Returns: a new #NotmuchFilterDiscardUuencode filter.
+ **/
+static GMimeFilter *
+notmuch_filter_discard_uuencode_new (void)
+{
+ static GType type = 0;
+ NotmuchFilterDiscardUuencode *filter;
+
+ if (!type) {
+ static const GTypeInfo info = {
+ sizeof (NotmuchFilterDiscardUuencodeClass),
+ NULL, /* base_class_init */
+ NULL, /* base_class_finalize */
+ (GClassInitFunc) notmuch_filter_discard_uuencode_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof (NotmuchFilterDiscardUuencode),
+ 0, /* n_preallocs */
+ NULL, /* instance_init */
+ NULL /* value_table */
+ };
+
+ type = g_type_register_static (GMIME_TYPE_FILTER, "NotmuchFilterDiscardUuencode", &info, (GTypeFlags) 0);
+ }
+
+ filter = (NotmuchFilterDiscardUuencode *) g_object_newv (type, 0, NULL);
+ filter->state = 0;
+
+ return (GMimeFilter *) filter;
+}
+
/* We're finally down to a single (NAME + address) email "mailbox". */
static void
_index_address_mailbox (notmuch_message_t *message,
}
}
-static const char *
-skip_re_in_subject (const char *subject)
-{
- const char *s = subject;
-
- if (subject == NULL)
- return NULL;
-
- while (*s) {
- while (*s && isspace (*s))
- s++;
- if (strncasecmp (s, "re:", 3) == 0)
- s += 3;
- else
- break;
- }
-
- return s;
-}
-
-/* Given a string representing the body of a message, generate terms
- * for it, (skipping quoted portions and signatures).
- *
- * This function is evil in that it modifies the string passed to it,
- * (changing some newlines into '\0').
- */
-static void
-_index_body_text (notmuch_message_t *message, char *body)
-{
- char *line, *line_end, *next_line;
-
- if (body == NULL)
- return;
-
- next_line = body;
-
- while (1) {
- line = next_line;
- if (*line == '\0')
- break;
-
- next_line = strchr (line, '\n');
- if (next_line == NULL) {
- next_line = line + strlen (line);
- }
- line_end = next_line - 1;
-
- /* Get to the next non-blank line. */
- while (*next_line == '\n')
- next_line++;
-
- /* Skip blank lines. */
- if (line_end < line)
- continue;
-
- /* Skip lines that are quotes. */
- if (*line == '>')
- continue;
-
- /* Also skip lines introducing a quote on the next line. */
- if (*line_end == ':' && *next_line == '>')
- continue;
-
- /* Finally, bail as soon as we see a signature. */
- /* XXX: Should only do this if "near" the end of the message. */
- if (strncmp (line, "-- ", 3) == 0)
- break;
-
- *(line_end + 1) = '\0';
-
- _notmuch_message_gen_terms (message, NULL, line);
- }
-}
-
/* Callback to generate terms for each mime part of a message. */
static void
_index_mime_part (notmuch_message_t *message,
GMimeObject *part)
{
- GMimeStream *stream;
+ GMimeStream *stream, *filter;
+ GMimeFilter *discard_uuencode_filter;
GMimeDataWrapper *wrapper;
GByteArray *byte_array;
GMimeContentDisposition *disposition;
char *body;
+ const char *charset;
+
+ if (! part) {
+ fprintf (stderr, "Warning: Not indexing empty mime part.\n");
+ return;
+ }
if (GMIME_IS_MULTIPART (part)) {
GMimeMultipart *multipart = GMIME_MULTIPART (part);
int i;
+ if (GMIME_IS_MULTIPART_SIGNED (multipart))
+ _notmuch_message_add_term (message, "tag", "signed");
+
+ if (GMIME_IS_MULTIPART_ENCRYPTED (multipart))
+ _notmuch_message_add_term (message, "tag", "encrypted");
+
for (i = 0; i < g_mime_multipart_get_count (multipart); i++) {
if (GMIME_IS_MULTIPART_SIGNED (multipart)) {
/* Don't index the signature. */
if (i > 1)
fprintf (stderr, "Warning: Unexpected extra parts of multipart/signed. Indexing anyway.\n");
}
+ if (GMIME_IS_MULTIPART_ENCRYPTED (multipart)) {
+ /* Don't index encrypted parts. */
+ continue;
+ }
_index_mime_part (message,
g_mime_multipart_get_part (multipart, i));
}
stream = g_mime_stream_mem_new_with_byte_array (byte_array);
g_mime_stream_mem_set_owner (GMIME_STREAM_MEM (stream), FALSE);
+
+ filter = g_mime_stream_filter_new (stream);
+ discard_uuencode_filter = notmuch_filter_discard_uuencode_new ();
+
+ g_mime_stream_filter_add (GMIME_STREAM_FILTER (filter),
+ discard_uuencode_filter);
+
+ charset = g_mime_object_get_content_type_parameter (part, "charset");
+ if (charset) {
+ GMimeFilter *charset_filter;
+ charset_filter = g_mime_filter_charset_new (charset, "UTF-8");
+ /* This result can be NULL for things like "unknown-8bit".
+ * Don't set a NULL filter as that makes GMime print
+ * annoying assertion-failure messages on stderr. */
+ if (charset_filter) {
+ g_mime_stream_filter_add (GMIME_STREAM_FILTER (filter),
+ charset_filter);
+ g_object_unref (charset_filter);
+ }
+ }
+
wrapper = g_mime_part_get_content_object (GMIME_PART (part));
if (wrapper)
- g_mime_data_wrapper_write_to_stream (wrapper, stream);
+ g_mime_data_wrapper_write_to_stream (wrapper, filter);
g_object_unref (stream);
+ g_object_unref (filter);
+ g_object_unref (discard_uuencode_filter);
g_byte_array_append (byte_array, (guint8 *) "\0", 1);
body = (char *) g_byte_array_free (byte_array, FALSE);
- _index_body_text (message, body);
+ if (body) {
+ _notmuch_message_gen_terms (message, NULL, body);
- free (body);
+ free (body);
+ }
}
notmuch_status_t
_index_address_list (message, "to", addresses);
subject = g_mime_message_get_subject (mime_message);
- subject = skip_re_in_subject (subject);
_notmuch_message_gen_terms (message, "subject", subject);
_index_mime_part (message, g_mime_message_get_mime_part (mime_message));
projects / notmuch / blobdiff