better exception handling in cgi

cgi-bin/comex_merci_pour_les_infos.py.cgi

@@ -10,7 +10,8 @@ __version__   = "1"
 __email__     = "romain.loth@iscpif.fr"
 __status__    = "Test"
 
-from cgi import FieldStorage
+from cgi         import FieldStorage
+from traceback   import format_tb
 
 # debug
 import cgitb
@@ -21,51 +22,60 @@ if __name__ == "__main__":
     # reception: the cgi library gets vars from html form within received http POST
     this_data = FieldStorage()
 
-    # read into local str vars
-    first_name  = this_data['first_name'].value
-    middle_name = this_data['middle_name'].value
-    last_name   = this_data['last_name'].value
-    initials    = this_data['initials'].value
-    email       = this_data['email'].value
-    country     = this_data['country'].value
-    jobtitle    = this_data['hon_title'].value
-    keywordsss  = this_data['keywords'].value   # single string but ','-separated
-    # keywordzzz = this_data.getlist(keywords)   # array
+    # fyi actual form fields were
+    # ['email', 'password', 'password2',
+    #  'hon_title', 'first_name', 'middle_name', 'last_name', 'initials',
+    #  'keywords', 'country', 'my-captcha', 'my-captchaHash']
 
-    # todo
-    # institution = this_data[].value
+    try:
+        # read into local str vars
+        first_name  = this_data['first_name'].value
+        middle_name = this_data['middle_name'].value
+        last_name   = this_data['last_name'].value
+        initials    = this_data['initials'].value
+        email       = this_data['email'].value
+        country     = this_data['country'].value
+        jobtitle    = this_data['hon_title'].value
+        keywordsss  = this_data['keywords'].value   # single string but ','-separated
+        # keywordzzz = this_data.getlist(keywords)   # array
 
-    # optional
-    # picture = form["user_picture"]
-    # if picture.file & picture.filename:
-    #     picture_bytes = picture.value
+        # todo
+        # institution = this_data[].value
 
-    # debug log
-    # log = open('../cgi_my_output.log', 'w')
-    # print('first_name:',first_name, file=log)
-    # print('midle_name:',midle_name, file=log)
-    # print('last_name:',last_name, file=log)
-    # print('initials:',initials, file=log)
-    # print('email:',email, file=log)
-    # print('country:',country, file=log)
-    # print('jobtitle:',jobtitle, file=log)
-    # print('keywordsss:',keywordsss, file=log)
-    # print('instituton:',institution, file=log)
-    # log.close()
+        # optional
+        # picture = form["user_picture"]
+        # if picture.file & picture.filename:
+        #     picture_bytes = picture.value
 
-    # response
-    print("Content-type: text/html")
-    print()  # blank line <=> end of headers
+        # response
+        print("Content-type: text/html")
+        print()  # blank line <=> end of headers
 
-    print("<TITLE>CGI script output</TITLE>")
-    print([k for k in this_data])
-    #
-    print('<br>first_name:',first_name)
-    print('<br>midle_name:',middle_name)
-    print('<br>last_name:',last_name)
-    print('<br>initials:',initials)
-    print('<br>email:',email)
-    print('<br>country:',country)
-    print('<br>jobtitle:',jobtitle)
-    print('<br>keywords:',keywordsss)
-    # print('instituton:',institution)
+        print("<TITLE>CGI script output</TITLE>")
+        print([k for k in this_data])
+        #
+        print('<br>first_name:',first_name)
+        print('<br>midle_name:',middle_name)
+        print('<br>last_name:',last_name)
+        print('<br>initials:',initials)
+        print('<br>email:',email)
+        print('<br>country:',country)
+        print('<br>jobtitle:',jobtitle)
+        print('<br>keywords:',keywordsss)
+        # print('instituton:',institution)
+
+    except KeyError as kerrr:
+        print("Content-type: text/html")
+        print()  # blank line <=> end of headers
+        print("<h3>Your form was empty</h3")
+        print("<p style='font-family:monospace; font-size:80%'")
+        print("<br/>".join(format_tb(kerrr.__traceback__)))
+        print("</p>")
+
+    except Exception as errr:
+        print("Content-type: text/html")
+        print()  # blank line <=> end of headers
+        print("<h3>There was an error:</h3")
+        print("<p style='font-family:monospace; font-size:80%'")
+        print("<br/>".join(format_tb(errr.__traceback__)))
+        print("</p>")