Ubuntu+Asterisk环境下使用Pycall调用出现验证错误求助

Hey there! Let's work through this Pycall validation error you're facing. Since your Asterisk setup is already working smoothly with Zoiper, the issue is likely tied to how Pycall interacts with Asterisk's configuration, permissions, or syntax requirements. Here are the key steps to diagnose and fix this:

1. Check Spool Directory Permissions #

Pycall needs write access to Asterisk's outgoing spool directory (default: /var/spool/asterisk/outgoing/) to drop the call file.

• First, verify the directory's permissions with:

  ls -ld /var/spool/asterisk/outgoing/
  

• If your user account doesn't have write access, add yourself to the asterisk group for a persistent fix:

  sudo usermod -aG asterisk your_username
  

  Log out and back in for this change to take effect. Alternatively, temporarily grant world write access for quick testing:

  sudo chmod o+w /var/spool/asterisk/outgoing/
  

2. Validate Your Call Target Format #

The SIP/flowroute/18882223333 target must match Asterisk's expected channel syntax and your SIP trunk configuration.

• Test the call directly from the Asterisk console first to rule out trunk issues:
  1. Enter the Asterisk console:

     asterisk -rvvv
     

  2. Run this command to initiate the call manually:

     channel originate SIP/flowroute/18882223333 application Playback hello-world
     

• If this command fails, check your sip.conf to ensure the flowroute peer is correctly defined, and the number format matches your trunk's requirements. If it works, the issue is specific to Pycall's configuration.

3. Capture Detailed Pycall Error Messages #

Generic "validation error" messages aren't helpful—let's get specifics by wrapping your code in a try-except block:

from pycall import CallFile, Call, Application

try:
    call = Call('SIP/flowroute/18882223333')
    action = Application('Playback', 'hello-world')
    c = CallFile(call, action)
    c.spool()
except Exception as e:
    print(f"Full error details: {str(e)}")

This will tell you exactly what's failing (e.g., missing required parameters, permission denied, invalid channel syntax).

4. Verify Pycall-Asterisk Compatibility #

Pycall versions can have compatibility gaps with older Asterisk releases like 13.20.

• Upgrade Pycall to the latest version to rule out version-specific bugs:

  pip install --upgrade pycall
  

• If upgrading doesn't help, try explicitly adding required parameters to the Call object (some older Pycall versions expect these):

  call = Call('SIP/flowroute/18882223333', context='default', extension='18882223333')
  

5. Test with a Manual Call File #

Pycall works by generating a call file and dropping it into the spool directory. Let's bypass Pycall entirely to confirm Asterisk can process the call:

1. Create a file named test.call with this content:

   Channel: SIP/flowroute/18882223333
   Application: Playback
   Data: hello-world
   

2. Move it to the spool directory:

   sudo mv test.call /var/spool/asterisk/outgoing/
   

3. Check if the call initiates, and monitor Asterisk's logs for issues:

   tail -f /var/log/asterisk/messages
   

If this manual call works, the problem is definitely in Pycall's setup; if not, debug your Asterisk trunk or dialplan further.

内容的提问来源于stack exchange，提问作者user9315259