Documentation and Reporting

Example 4-1. Retrieving email using POP3
#!/usr/bin/env python
import poplib
username = 'someuser'
password = 'S3Cr37'
mail_server = 'mail.somedomain.com'
p = poplib.POP3(mail_server)
p.user(username)
p.pass_(password)
for msg_id in p.list()[1]:
    print msg_id
    outf = open('%s.eml' % msg_id, 'w')
    outf.write('\n'.join(p.retr(msg_id)[1]))
    outf.close()
p.quit()


Example 4-2. Retrieving email using IMAP
#!/usr/bin/env python
import imaplib
username = 'some_user'
password = '70P53Cr37'
mail_server = 'mail_server'
i = imaplib.IMAP4_SSL(mail_server)
print i.login(username, password)
print i.select('INBOX')
for msg_id in i.search(None, 'ALL')[1][0].split():
    print msg_id
    outf = open('%s.eml' % msg_id, 'w')
    outf.write(i.fetch(msg_id, '(RFC822)')[1][0][1])
    outf.close()
i.logout()


Example 4-3. “Hello World” PDF
#!/usr/bin/env python
from reportlab.pdfgen import canvas
def hello():
    c = canvas.Canvas("helloworld.pdf")
    c.drawString(100,100,"Hello World")
    c.showPage()
    c.save()
hello()


Example 4-4. Disk report PDF
#!/usr/bin/env python
import subprocess
import datetime
from reportlab.pdfgen import canvas
from reportlab.lib.units import inch
def disk_report():
    p = subprocess.Popen("df -h", shell=True,
        stdout=subprocess.PIPE)
    return p.stdout.readlines()
def create_pdf(input,output="disk_report.pdf"):
    now = datetime.datetime.today()
    date = now.strftime("%h %d %Y %H:%M:%S")
    c = canvas.Canvas(output)
    textobject = c.beginText()
    textobject.setTextOrigin(inch, 11*inch)
    textobject.textLines('''
    Disk Capacity Report: %s
    ''' % date)
    for line in input:
        textobject.textLine(line.strip())
    c.drawText(textobject)
    c.showPage()
    c.save()
report = disk_report()
create_pdf(report)


Example 4-5. Sending messages with SMTP
#!/usr/bin/env python
import smtplib
mail_server = 'localhost'
mail_server_port = 25
from_addr = '[email protected]'
to_addr = '[email protected]'
from_header = 'From: %s\r\n' % from_addr
to_header = 'To: %s\r\n\r\n' % to_addr
subject_header = 'Subject: nothing interesting'
body = 'This is a not-very-interesting email.'
email_message = '%s\n%s\n%s\n\n%s' % (from_header, to_header, subject_header, body)
s = smtplib.SMTP(mail_server, mail_server_port)
s.sendmail(from_addr, to_addr, email_message)
s.quit()


Example 4-6. SMTP authentication
#!/usr/bin/env python
import smtplib
mail_server = 'smtp.example.com'
mail_server_port = 465
from_addr = '[email protected]'
to_addr = '[email protected]'
from_header = 'From: %s\r\n' % from_addr
to_header = 'To: %s\r\n\r\n' % to_addr
subject_header = 'Subject: Testing SMTP Authentication'
body = 'This mail tests SMTP Authentication'
email_message = '%s\n%s\n%s\n\n%s' % (from_header, to_header, subject_header, body)
s = smtplib.SMTP(mail_server, mail_server_port)
s.set_debuglevel(1)
s.starttls()
s.login("fatalbert", "mysecretpassword")
s.sendmail(from_addr, to_addr, email_message)
s.quit()


Example 4-7. Sending a PDF attachment email
import email
from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email import encoders
import smtplib
import mimetypes
from_addr = '[email protected]'
to_addr = '[email protected]'
subject_header = 'Subject: Sending PDF Attachemt'
attachment = 'disk_usage.pdf'
body = '''
This message sends a PDF attachment created with Report
Lab.
'''
m = MIMEMultipart()
m["To"] = to_addr
m["From"] = from_addr
m["Subject"] = subject_header
ctype, encoding = mimetypes.guess_type(attachment)
print ctype, encoding
maintype, subtype = ctype.split('/', 1)
print maintype, subtype
m.attach(MIMEText(body))
fp = open(attachment, 'rb')
msg = MIMEBase(maintype, subtype)
msg.set_payload(fp.read())
fp.close()
encoders.encode_base64(msg)
msg.add_header("Content-Disposition", "attachment", filename=attachment)
m.attach(msg)
s = smtplib.SMTP("localhost")
s.set_debuglevel(1)
s.sendmail(from_addr, to_addr, m.as_string())
s.quit()