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emailparser
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Speed up the parsing loop by not checking the database for existing rows, if -f (forced) is specified anyway.

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master
Sven Slootweg 13 years ago
parent 7bae114ee9
commit f690610b9a
1 changed files with 73 additions and 67 deletions
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140
parse
Unescape Escape View File

@ -90,10 +90,12 @@ for email_file in file_list:
# To save time when updating a database, let's first check whether the filename is already present in the database as a hash.
# There is no need to check for the format here, since if the filename is not a valid hash, it simply won't match anything.
sha1_hash = os.path.splitext(os.path.split(email_file)[1])[0]
cursor.execute("SELECT * FROM emails WHERE `Hash` = ?", (sha1_hash,))
if len(cursor.fetchall()) > 0 and options['forced'] == False:
print "Skipping %s, already exists in the database according to filename." % sha1_hash
continue
if options['forced'] == False:
cursor.execute("SELECT * FROM emails WHERE `Hash` = ?", (sha1_hash,))
if len(cursor.fetchall()) > 0:
print "Skipping %s, already exists in the database according to filename." % sha1_hash
continue
message = email.message_from_file(open(email_file, 'r'))
@ -111,81 +113,85 @@ for email_file in file_list:
sha1_hash = hashlib.sha1("%s/%s/%s/%s" % (message['from'], message['to'], message['message-id'], subject)).hexdigest()
cursor.execute("SELECT * FROM emails WHERE `Hash` = ?", (sha1_hash,))
if len(cursor.fetchall()) == 0 or options['forced'] == True:
message_parts = [find_submessages(message)]
message_parts = flatten(message_parts)
if options['forced'] == False:
cursor.execute("SELECT * FROM emails WHERE `Hash` = ?", (sha1_hash,))
if len(cursor.fetchall()) > 0:
print "Skipping %s, already exists in the database according to message hash." % sha1_hash
continue
for part in message_parts:
if part.get_filename() is None:
# Part of the message
if part.get_content_type() == "text/plain":
if textbody == "":
message_parts = [find_submessages(message)]
message_parts = flatten(message_parts)
for part in message_parts:
if part.get_filename() is None:
# Part of the message
if part.get_content_type() == "text/plain":
if textbody == "":
try:
textbody = part.get_payload(decode=True).decode(get_charset(part))
except UnicodeDecodeError:
# This part is probably in windows-1252 encoding
try:
textbody = part.get_payload(decode=True).decode(get_charset(part))
textbody = part.get_payload(decode=True).decode('windows-1252')
except UnicodeDecodeError:
# This part is probably in windows-1252 encoding
try:
textbody = part.get_payload(decode=True).decode('windows-1252')
except UnicodeDecodeError:
# Ok, we really have no clue how to decode this, we'll just skip it...
continue
except LookupError:
pass
elif part.get_content_type() == "text/html" or part.get_content_type == "text/xhtml+xml" or part.get_content_type == "application/xhtml+xml":
if htmlbody == "":
# Ok, we really have no clue how to decode this, we'll just skip it...
continue
except LookupError:
pass
elif part.get_content_type() == "text/html" or part.get_content_type == "text/xhtml+xml" or part.get_content_type == "application/xhtml+xml":
if htmlbody == "":
try:
htmlbody = part.get_payload(decode=True).decode(get_charset(part))
except UnicodeDecodeError:
# This part is probably in windows-1252 encoding
try:
htmlbody = part.get_payload(decode=True).decode(get_charset(part))
htmlbody = part.get_payload(decode=True).decode('windows-1252')
except UnicodeDecodeError:
# This part is probably in windows-1252 encoding
try:
htmlbody = part.get_payload(decode=True).decode('windows-1252')
except UnicodeDecodeError:
# Ok, we really have no clue how to decode this, we'll just skip it...
continue
except LookupError:
pass
else:
# Technically this is supposed to be part of the message body, but we have no idea what format it is in...
print "WARNING: Unknown message format encountered in %s, message may be incomplete." % sha1_hash
# Ok, we really have no clue how to decode this, we'll just skip it...
continue
except LookupError:
pass
else:
# Attachment
attachment_data = part.get_payload(decode=True)
attachment_sha1 = hashlib.sha1(attachment_data).hexdigest()
attachment_filename = part.get_filename()
attachment_type = part.get_content_type()
attachment_extension = os.path.splitext(attachment_filename)[1]
attachment_size = len(attachment_data)
attachment_destination = "%s/%s%s" % (options['attachment_dir'], attachment_sha1, attachment_extension)
attachment_list.append((attachment_filename, attachment_type, attachment_sha1, attachment_size))
attachment_file = open(attachment_destination, "w")
attachment_file.write(attachment_data)
attachment_file.close()
try:
timestamp = int(time.mktime(email.utils.parsedate(message['date'])))
except TypeError:
timestamp = 0
print "WARNING: Failed to determine unix timestamp for %s." % sha1_hash
# Technically this is supposed to be part of the message body, but we have no idea what format it is in...
print "WARNING: Unknown message format encountered in %s, message may be incomplete." % sha1_hash
else:
# Attachment
attachment_data = part.get_payload(decode=True)
attachment_sha1 = hashlib.sha1(attachment_data).hexdigest()
attachment_filename = part.get_filename()
attachment_type = part.get_content_type()
attachment_extension = os.path.splitext(attachment_filename)[1]
attachment_size = len(attachment_data)
attachment_destination = "%s/%s%s" % (options['attachment_dir'], attachment_sha1, attachment_extension)
attachment_list.append((attachment_filename, attachment_type, attachment_sha1, attachment_size))
attachment_file = open(attachment_destination, "w")
attachment_file.write(attachment_data)
attachment_file.close()
new_row = (getheader(message['message-id']), getheader(message['from']), getheader(message['to']), getheader(subject), timestamp, textbody, htmlbody, sha1_hash)
cursor.execute("INSERT INTO emails VALUES (?, ?, ?, ?, ?, ?, ?, ?)", new_row)
print "Successfully parsed and inserted e-mail with SHA1 hash %s." % sha1_hash
else:
print "Skipping %s, already exists in the database." % sha1_hash
try:
timestamp = int(time.mktime(email.utils.parsedate(message['date'])))
except TypeError:
timestamp = 0
print "WARNING: Failed to determine unix timestamp for %s." % sha1_hash
new_row = (getheader(message['message-id']), getheader(message['from']), getheader(message['to']), getheader(subject), timestamp, textbody, htmlbody, sha1_hash)
cursor.execute("INSERT INTO emails VALUES (?, ?, ?, ?, ?, ?, ?, ?)", new_row)
print "Successfully parsed and inserted e-mail with SHA1 hash %s." % sha1_hash
if len(attachment_list) > 0:
inserted = 0
for attachment in attachment_list:
cursor.execute("SELECT * FROM attachments WHERE `Hash` = ?", (attachment[2],))
if len(cursor.fetchall()) == 0 or options['forced'] == True:
new_row = (sha1_hash, attachment[0], attachment[1], attachment[2], attachment[3])
cursor.execute("INSERT INTO attachments VALUES (?, ?, ?, ?, ?)", new_row)
inserted += 1
else:
print "Skipping attachment %s, already exists in the database." % attachment[2]
if options['forced'] == False:
cursor.execute("SELECT * FROM attachments WHERE `Hash` = ?", (attachment[2],))
if len(cursor.fetchall()) > 0:
print "Skipping attachment %s, already exists in the database." % attachment[2]
continue
new_row = (sha1_hash, attachment[0], attachment[1], attachment[2], attachment[3])
cursor.execute("INSERT INTO attachments VALUES (?, ?, ?, ?, ?)", new_row)
inserted += 1
if inserted > 0:
print "Successfully inserted %d attachment(s) for %s." % (inserted, sha1_hash)

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