added exception handling for unknown hostname

api.py

@@ -19,13 +19,16 @@ def gen_word(N, min_N_dig, min_N_low):
 dbFailing = False
 
 import mysql.connector as con
-from mysql.connector.errors import InterfaceError
+from mysql.connector.errors import InterfaceError, DatabaseError
 try:
     mycon = con.connect(host=flask_app.config['DB_HOST'],user=flask_app.config['DB_USER'],password=flask_app.config['DB_PASSWORD'],port=flask_app.config['DB_PORT'],database=flask_app.config['DB_NAME'])
     mycursor = mycon.cursor()
 except InterfaceError:
     print("Could not connect to the database!")
     dbFailing = True
+except DatabaseError:
+    print("Unknown Host")
+    dbFailing = True
 
 """
 @flask_app.route("/")

app/misc.ini

@@ -9,6 +9,7 @@ PL01 = Failed to fetch the PDB, please check the PDB Code
 
 DB00 = Failed to connect to the database.
 DB01 = This Job ID does not exist 😠. If you think this is an error, please contact us.
+DB02 = Unknown Hostname, failed to connect to the database.
 
 CW01 = Looks like an invalid PDB ID
 

app/views.py

@@ -15,7 +15,7 @@ import json
 import subprocess
 
 import mysql.connector as con
-from mysql.connector.errors import InterfaceError
+from mysql.connector.errors import InterfaceError,DatabaseError
 
 import requests
 
@@ -134,6 +134,8 @@ def status():
                 mycursor = mycon.cursor()
             except InterfaceError:
                 return render_template('error.html',code="DB00",description=errors['DB00'])
+            except DatabaseError:
+                return render_template('error.html',code="DB02",description=errors['DB02'])
             sqlQuery = 'select id, protein_name, ligand_name, date, description, done, pdb from curieweb where id="%s"' % (jobID)
             mycursor.execute(sqlQuery)
             records = mycursor.fetchall()
@@ -309,6 +311,8 @@ def dock_manual():
             mycursor = mycon.cursor()
         except InterfaceError:
             return render_template("error.html",code="DB00",description=errors['DB00'])
+        except DatabaseError:
+            return render_template("error.html",code="DB02",description=errors['DB02'])
 
         import tempfile
         with tempfile.TemporaryDirectory() as directory:
@@ -361,6 +365,8 @@ def dock_automatic():
             mycursor = mycon.cursor()
         except InterfaceError:
             return render_template('error.html',code="DB00",description=errors['DB00'])
+        except DatabaseError:
+            return render_template("error.html",code="DB02",description=errors['DB02'])
 
         sqlQuery = "insert into curieweb (id, email, pdb, ligand_smile, ligand_name, date, description) values (%s,%s,%s,%s,%s,CURDATE(),%s) "
         jobID = gen_word(16, 1, 1)