/usr/lib/python3/dist-packages/hl7/util.py is in python3-hl7 0.3.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | # -*- coding: utf-8 -*-
from __future__ import unicode_literals
import string
import datetime
import random
import logging
logger = logging.getLogger(__file__)
def ishl7(line):
"""Determines whether a *line* looks like an HL7 message.
This method only does a cursory check and does not fully
validate the message.
:rtype: bool
"""
# Prevent issues if the line is empty
return line and (line.strip()[:3] in ['MSH']) or False
def isfile(line):
"""
Files are wrapped in FHS / FTS
FHS = file header segment
FTS = file trailer segment
"""
return line and (line.strip()[:3] in ['FHS']) or False
def split_file(hl7file):
"""
Given a file, split out the messages.
Does not do any validation on the message.
Throws away batch and file segments.
"""
rv = []
for line in hl7file.split('\r'):
line = line.strip()
if line[:3] in ['FHS', 'BHS', 'FTS', 'BTS']:
continue
if line[:3] == 'MSH':
newmsg = [line]
rv.append(newmsg)
else:
if len(rv) == 0:
logger.error('Segment received before message header [%s]', line)
continue
rv[-1].append(line)
rv = ['\r'.join(msg) for msg in rv]
for i, msg in enumerate(rv):
if not msg[-1] == '\r':
rv[i] = msg + '\r'
return rv
alphanumerics = string.ascii_uppercase + string.digits
def generate_message_control_id():
"""Generate a unique 20 character message id.
See http://www.hl7resources.com/Public/index.html?a55433.htm
"""
d = datetime.datetime.utcnow()
# Strip off the decade, ID only has to be unique for 3 years.
# So now we have a 16 char timestamp.
timestamp = d.strftime("%y%j%H%M%S%f")[1:]
# Add 4 chars of uniqueness
unique = ''.join(random.sample(alphanumerics, 4))
return timestamp + unique
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