truncate large e-mails

parametricJob.py

 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-#from future import standard_library
-#standard_library.install_aliases()
-import sys, os, os.path, shutil, socket, platform, glob, fnmatch
-import datetime, tarfile, subprocess, string, re
+import sys, os, os.path, socket, platform, fnmatch
+import subprocess, string, re
 from prmClasses import *
 
 # -- Base Class ----------------------------------------------------------------
@@ -64,10 +62,14 @@ class ParametricJob(PRMSet):
                 f.close()
             except:
                 text="file not found"
+
+        maxsize = 5*1024*1024
+        if(len(head+text)>maxsize):
+            text = text[:maxsize]
+            text+=f'\n\n[message truncated - see file={file}]\n'
         import smtplib
         server = smtplib.SMTP(smtpServ)        
         server.sendmail(fromA, toA, (head+text).encode('ascii','ignore'))
-        #server.sendmail(fromA, toA, head+text)
         server.quit()
 
     def mailhtml(self, file, subject):
@@ -75,7 +77,6 @@ class ParametricJob(PRMSet):
         # getting address & smtp servers
         fromA, toA, smtpServ = self.getMailData()
         # building email
-        #from email.MIMEText import MIMEText
         from email.mime.text import MIMEText
         file = open(file,'r')
         text = file.read()
@@ -105,9 +106,7 @@ class ParametricJob(PRMSet):
         mail['From']    = fromA
         mail['To']      = toA
         mail['Subject'] = subject
-        #mail.preamble   = 'Battery result in attachement \n'
         machineName = socket.gethostname()
-        #from email.MIMEText import MIMEText
         from email.mime.text import MIMEText
         text = "Battery result on %s in attachement ...\n" % machineName
         msg  = MIMEText(text, 'html','iso-8859-1')
@@ -131,6 +130,7 @@ class ParametricJob(PRMSet):
             print("file %s correctly closed after mailing" % fileName)
         except smtplib.SMTPException:
             text="file %s not found"%fileName
+
         # Encode the payload using Base64
         encoders.encode_base64(msg)
         (head, tail) = os.path.split(fileName)
@@ -205,7 +205,7 @@ class ParametricJob(PRMSet):
         nodeHost = socket.gethostname()
         filename = self.rmNodeResultsScriptName(jobId)
         localNodeDir = self.getLocalDiskDir(jobId)
-        #write file
+        # write file
         file=open(filename,"w")
         file.write("#!/usr/bin/env python3\n")
         #sshRmCmd = 'ssh %s "rm -rf %s"' % (nodeHost, localNodeDir)