Fix 'Anonymous token is invalid' error with automatic token refresh

[konard]

Summary

This PR fixes issue #16 by adding automatic token refresh when the VK API returns an "Anonymous token is invalid" error (error code 1116).

Problem

The acceptAllFriendRequests function was failing with the error:

{
  "error": {
    "error_code": 1116,
    "error_msg": "Anonymous token is invalid",
    "request_params": [
      {
        "key": "method",
        "value": "execute.acceptAllFriendRequests"
      }
    ]
  }
}

Root Cause Analysis

After extensive research, I found that:

1. Error Code 1116: VK API error 1116 means "Anonymous token is invalid" - the token is being treated as anonymous and rejected
2. Token Type Mismatch: The OAuth token obtained through Implicit Flow (response_type=token) may sometimes be categorized incorrectly by VK's servers as an "anonymous" token
3. Execute Method Requirements: The execute method with custom stored functions requires proper user authentication tokens
4. Similar Issues: This is one of several token-related authentication errors in the VK API:
   • Error 1114: "Anonymous token has expired"
   • Error 1116: "Anonymous token is invalid" (this issue)
   • Error 1118: "Anonymous token ip mismatch"

Solution

The fix follows the same pattern as PR #31 for handling token errors:

• Added ANONYMOUS_TOKEN_INVALID_ERROR_MESSAGE constant to detect the specific error message
• Updated the error handling logic in execute.sh to trigger automatic token refresh when this error occurs
• When detected, the script automatically acquires a new access token using Selenium automation with user credentials

Changes

• Updated execute.sh to detect and handle the "Anonymous token is invalid" error message
• Added the error to the existing token refresh mechanism that handles expired tokens, IP address changes, and missing tokens

Test Plan

The fix handles the error gracefully by:

1. Detecting the "Anonymous token is invalid" error message in the API response
2. Automatically running the Selenium-based token acquisition flow
3. Retrying the operation with the new token

Related Issues

• Fixes Anonymous token is invalid error #16
• Related to User authorization failed: invalid access_token (4). on acceptAllFriendRequests #18 (invalid access_token error)
• Related to Fix issue with token refreshing #5 (token refreshing issues)

🤖 Generated with Claude Code