Display fetchmail errors to the user, fixes #23

admin/freeposte/admin/models.py

@@ -208,3 +208,5 @@ class Fetch(Base):
     tls = db.Column(db.Boolean(), nullable=False)
     username = db.Column(db.String(255), nullable=False)
     password = db.Column(db.String(255), nullable=False)
+    last_check = db.Column(db.DateTime, nullable=True)
+    error = db.Column(db.String(1023), nullable=True)

admin/freeposte/admin/templates/fetch/list.html

@@ -17,11 +17,10 @@ Fetched accounts
   <tbody>
     <tr>
       <th>Actions</th>
-      <th>Protocol</th>
-      <th>Hostname</th>
-      <th>Port</th>
-      <th>TLS</th>
+      <th>Endpoint</th>
       <th>Username</th>
+      <th>Last check</th>
+      <th>Status</th>
       <th>Created</th>
       <th>Last edit</th>
     </tr>
@@ -31,11 +30,10 @@ Fetched accounts
         <a href="{{ url_for('.fetch_edit', fetch_id=fetch.id) }}" title="Edit"><i class="fa fa-pencil"></i></a>&nbsp;
         <a href="{{ url_for('.fetch_delete', fetch_id=fetch.id) }}" title="Delete"><i class="fa fa-trash"></i></a>
       </td>
-      <td>{{ fetch.protocol }}</td>
-      <td>{{ fetch.host }}</td>
-      <td>{{ fetch.port }}</td>
-      <td>{{ fetch.tls }}</td>
+      <td>{{ fetch.protocol }}{{ 's' if fetch.tls else '' }}://{{ fetch.host }}:{{ fetch.port }}</td>
       <td>{{ fetch.username }}</td>
+      <td>{{ fetch.last_check or '-' }}</td>
+      <td>{{ fetch.error or '-' }}</td>
       <td>{{ fetch.created_at }}</td>
       <td>{{ fetch.updated_at or '' }}</td>
     </tr>

admin/migrations/versions/dc8c25cf5b98_.py

@@ -0,0 +1,25 @@
+""" Add metadata related to fetches
+
+Revision ID: dc8c25cf5b98
+Revises: a4accda8a8c7
+Create Date: 2016-09-10 12:41:01.161357
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'dc8c25cf5b98'
+down_revision = 'a4accda8a8c7'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.add_column('fetch', sa.Column('error', sa.String(length=1023), nullable=True))
+    op.add_column('fetch', sa.Column('last_check', sa.DateTime(), nullable=True))
+
+
+def downgrade():
+    with op.batch_alter_table('fetch') as batch:
+        batch.drop_column('last_check')
+        batch.drop_column('error')

fetchmail/Dockerfile

@@ -7,8 +7,4 @@ RUN apk add --update \
 
 COPY fetchmail.py /fetchmail.py
 
-RUN mkdir /var/spool/mail \
- && chown mail: /var/spool/mail
-USER mail
-
 CMD ["/fetchmail.py"]

fetchmail/fetchmail.py

@@ -5,6 +5,7 @@ import time
 import os
 import tempfile
 import shlex
+import subprocess
 
 
 FETCHMAIL = """
@@ -28,20 +29,21 @@ def escape_rc_string(arg):
 
 
 def fetchmail(fetchmailrc):
-    print(fetchmailrc)
     with tempfile.NamedTemporaryFile() as handler:
         handler.write(fetchmailrc.encode("utf8"))
         handler.flush()
-        os.system(FETCHMAIL.format(shlex.quote(handler.name)))
+        command = FETCHMAIL.format(shlex.quote(handler.name))
+        output = subprocess.check_output(command, shell=True)
+        return output
 
 
-def run(cursor):
+def run(connection, cursor):
     cursor.execute("""
         SELECT user_email, protocol, host, port, tls, username, password
         FROM fetch
     """)
-    fetchmailrc = ""
     for line in cursor.fetchall():
+        fetchmailrc = ""
         user_email, protocol, host, port, tls, username, password = line
         options = "options ssl" if tls else ""
         fetchmailrc += RC_LINE.format(
@@ -53,7 +55,19 @@ def run(cursor):
             password=escape_rc_string(password),
             options=options
         )
-    fetchmail(fetchmailrc)
+        try:
+            print(fetchmail(fetchmailrc))
+            error_message = ""
+        except subprocess.CalledProcessError as error:
+            error_message = error.output.decode("utf8")
+            print(error.output)
+        finally:
+            cursor.execute("""
+                UPDATE fetch SET error=?, last_check=datetime('now')
+                WHERE user_email=?
+            """, (error_message.split("\n")[0], user_email))
+            connection.commit()
+
 
 
 if __name__ == "__main__":
@@ -62,5 +76,5 @@ if __name__ == "__main__":
     while True:
         time.sleep(int(os.environ.get("FETCHMAIL_DELAY", 10)))
         cursor = connection.cursor()
-        run(cursor)
+        run(connection, cursor)
         cursor.close()