change some settings for the demo environment

add error checks
improve mail generation (date, to, from, ...)

fotokiste/fotokiste/controllers.py

@@ -19,22 +19,34 @@ import re
 import datetime
 
 IMAGE_STORE = os.path.join(tempfile.gettempdir(), "fotokiste.jpg")
-VIDEO_URL = "http://localhost:8081/?action=stream"
-SNAPSHOT_URL = "http://localhost:8081/?action=snapshot"
+VIDEO_URL = "http://krake:8081/?action=stream"
+# Netzwerk-Problem beim xen-Switch ... - erstmal nur ein Standardbild
+#SNAPSHOT_URL = "http://krake:8081/?action=snapshot"
+SNAPSHOT_URL = "http://localhost:8080/static/images/fotokiste-default.jpg"
 ALLOWED_MAILADDRESS_CHARACTERS = "\w._%@-"
 ALLOWED_MAILTEXT_CHARACTERS = "\w@_\-\.\s\n\#\(\)\[\]\{\}\|\>\<\,\+/\'\"\?\!\:=%\$^&\*"
+MAIL_ADDRESS_REGEX = r"^[a-zA-Z0-9._%-]+@[a-zA-Z0-9._%-]+\.[a-zA-Z]{2,6}$"
+# TODO: this path is relative - to be fixed!
 MAIL_SIGNATURE_FILE = "mail_signature.txt"
-MAIL_FROM_ADDRESS = "fotokiste@glasmensch.org"
+MAIL_FROM_ADDRESS = '"Fusion-Fotokiste" <fotokiste@glasmensch.org>'
 MAIL_SUBJECT = "Ein Foto von der Fusion!"
-SMTP_HOST = "localhost"
+MAIL_ATTACHMENT_FILENAME = "fusion.jpeg"
+SMTP_HOST = "192.168.1.31"
 SMTP_PORT = "25"
 MAIL_MAX_LENGTH = 5000
+ERRORS_MAX_LENGTH = 25
 
+errors = []
 
 DEFAULT_DICT = { "video_url": VIDEO_URL }
 
 def debug(message):
-    print "%s: %s" % (datetime.datetime.now().isoformat(), message)
+    log_msg = "%s: %s" % (datetime.datetime.now().isoformat(), message)
+    errors.append(log_msg)
+    # remove old messages, if necessary
+    while len(errors) > ERRORS_MAX_LENGTH:
+        del errors[0]
+    print log_msg
 
 def merged_dicts(dict_a, dict_b):
     return dict(dict_a.items() + dict_b.items())
@@ -50,51 +62,62 @@ def filter_mailtext(text):
         return filtered
 
 def check_mailaddress(address):
-    if re.match("^[a-zA-Z0-9._%-]+@[a-zA-Z0-9._%-]+\.[a-zA-Z]{2,6}$", address):
+    if re.match(MAIL_ADDRESS_REGEX, address):
         return True
     else:
         return False
 
 def send_mail(address, text):
     import smtplib
-    import MimeWriter
     import StringIO
-    import base64
+    import email.Generator
+    import email.MIMEMultipart
+    import email.MIMEText
+    import email.MIMEImage
+    import rfc822
     # read the additional mail parts (signature and picture)
     try:
         signature = file(MAIL_SIGNATURE_FILE).read()
     except IOError, msg:
         debug("failed to open the signature file (%s): %s" % \
                 (MAIL_SIGNATURE_FILE, msg))
+	return False
     try:
-        picture = StringIO.StringIO(file(IMAGE_STORE).read())
+        picture = file(IMAGE_STORE).read()
     except IOError, msg:
         debug("failed to open the image file (%s): %s" % \
                 (IMAGE_STORE, msg))
+	return False
 
     # prepare the message
-    message = StringIO.StringIO()
-    writer = MimeWriter.MimeWriter(message)
-    writer.addheader("Subject", MAIL_SUBJECT)
-    # the picture should be shown inline by the mail clients
-    writer.addheader("Content-Disposition", "inline")
-    writer.startmultipartbody('mixed')
-    # start off with a text/plain part
-    part = writer.nextpart()
-    body = part.startbody('text/plain')
-    body.write(text + signature)
-    # now add an attachment
-    part = writer.nextpart()
-    # the 'Content-Disposition' is necessary for displaying the image inline
-    part.addheader('Content-Disposition', 'attachment; filename="fusion.jpeg"')
-    part.addheader('Content-Transfer-Encoding', 'base64')
-    body = part.startbody('image/jpeg')
-    base64.encode(picture, body)
-    # finish off
-    writer.lastpart()
+    #mail_flat = StringIO.StringIO()
+    #mail_gen = email.Generator.Generator(mail_flat)
+    #mail_gen.flatten(body)
+    mail = email.MIMEMultipart.MIMEMultipart()
+    mail_text = email.MIMEText.MIMEText(text + signature)
+    mail_pict = email.MIMEImage.MIMEImage(picture, "jpeg")
+    mail_pict.add_header("Content-Disposition",
+            'attachment; filename="%s"' % MAIL_ATTACHMENT_FILENAME)
+    mail.add_header("Subject", MAIL_SUBJECT)
+    mail.add_header("To", address)
+    mail.add_header("From", MAIL_FROM_ADDRESS)
+    mail.add_header("Date", rfc822.formatdate())
+    mail.add_header("Content-Disposition", "inline")
+    mail.attach(mail_text)
+    mail.attach(mail_pict)
+    writer = StringIO.StringIO()
+    email.Generator.Generator(writer).flatten(mail)
 
-    con = smtplib.SMTP(SMTP_HOST, SMTP_PORT)
-    con.sendmail(address, MAIL_FROM_ADDRESS, message.getvalue())
+    # send the mail
+    try:
+        con = smtplib.SMTP(SMTP_HOST, SMTP_PORT)
+        con.sendmail(address, MAIL_FROM_ADDRESS, writer.getvalue())
+        con.quit()
+    except (smtplib.SMTPHeloError, smtplib.SMTPRecipientsRefused,
+            smtplib.SMTPSenderRefused, smtplib.SMTPDataError), msg:
+        debug("an error occoured while sending the mail: %s" % msg)
+        return False
+    return True
 
 
 class Root(controllers.RootController):
@@ -102,8 +125,7 @@ class Root(controllers.RootController):
     @expose(template="fotokiste.templates.start")
     def index(self, **kargs):
 
-        # Bilder zufaellig aus der Datenbank auswaehlen
-        # eine andere Funktion muss die Bilder ausliefern
+        # TODO: this should generate a selection of random pictures
         gallery = []
         for i in range(22):
             obj = DummyPicture()
@@ -111,7 +133,7 @@ class Root(controllers.RootController):
             obj.url = "URL: %d" % i
             gallery.append(obj)
 
-        # alte Bild-Datei loeschen
+        # remove old picture
         if os.path.isfile(IMAGE_STORE):
             os.unlink(IMAGE_STORE)
         
@@ -123,6 +145,7 @@ class Root(controllers.RootController):
         flash("Das Bild wird in 5 Sekunden aufgenommen!")
         return merged_dicts({}, DEFAULT_DICT)
 
+
     @expose(template="fotokiste.templates.mailtext")
     def mailtext(self, mailaddress="", mailtext="", already_stored="no", **kargs):
         # store the picture if necessary
@@ -141,6 +164,7 @@ class Root(controllers.RootController):
                 "already_stored": already_stored,
                 }, DEFAULT_DICT)
 
+
     @expose(template="fotokiste.templates.senden")
     def senden(self, mailaddress="", mailtext="", senden=None):
         # filter input
@@ -159,9 +183,11 @@ class Root(controllers.RootController):
                 flash("Die Mailadresse scheint nicht ungueltig zu sein.")
             redirect("mailtext", return_dict)
         else:
-            # Mail versenden
-            send_mail(mailaddress, mailtext)
-            return return_dict
+            # send the mail
+            if send_mail(mailaddress, mailtext):
+                return return_dict
+            else:
+                redirect("error")
 
     @expose()
     def get_current_shot(self):