| """Bounded private-Space probe and checkpoint coordinator. Never restarts a Space.""" |
| import os |
| import time |
| from urllib.parse import urlsplit |
| import httpx |
|
|
|
|
| def coordinate(client, sleep=time.sleep, clock=time.time): |
| target=os.environ['VM_SPACE_URL'].rstrip('/') |
| parsed=urlsplit(target) |
| if parsed.scheme!='https' or not parsed.hostname or not parsed.hostname.endswith('.hf.space') or parsed.path or parsed.query or parsed.fragment or parsed.port or parsed.username: |
| raise ValueError('expected a dedicated HTTPS hf.space origin') |
| space=os.environ['VM_SPACE_ID'] |
| import re |
| if not re.fullmatch(r'[A-Za-z0-9_.-]+/[A-Za-z0-9_.-]+',space):raise ValueError('invalid Space identity') |
| hf=os.environ['HF_SPACE_TOKEN'];trigger=os.environ['VM_BACKUP_TRIGGER_TOKEN'] |
| if len(trigger)<32:raise ValueError('trigger token must have at least 32 characters') |
| hfheaders={'Authorization':'Bearer '+hf} |
| metadata=client.get('https://huggingface.co/api/spaces/'+space,headers=hfheaders) |
| metadata.raise_for_status() |
| if metadata.json().get('private') is not True:raise ValueError('Space privacy not verified') |
| headers={**hfheaders,'X-VM-Backup-Token':trigger} |
| |
| |
| for attempt in range(40): |
| try: |
| response=client.get(target+'/api/admin/backup-status',headers=headers) |
| if response.status_code==200 and response.json().get('configured'):break |
| if response.status_code in (401,403,404):raise ValueError('private Space route/authentication inaccessible') |
| except (httpx.TimeoutException,httpx.NetworkError):pass |
| sleep(15) |
| else:raise ValueError('private Space did not become reachable within ten minutes') |
| before=response.json().get('last_success') |
| result=client.post(target+'/api/admin/backup',headers=headers,json={});result.raise_for_status() |
| if result.json().get('accepted') is not True:raise ValueError('checkpoint not accepted') |
| started=clock() |
| for attempt in range(120): |
| sleep(10) |
| status=client.get(target+'/api/admin/backup-status',headers=headers);status.raise_for_status();report=status.json() |
| if report.get('failure_code'):raise ValueError('Space reported backup failure') |
| latest=report.get('last_success') |
| if latest and latest!=before and latest.get('created_at',0)>=started-10: |
| return {'verified':True,'checkpoint':latest['checkpoint'],'private_route_verified':True} |
| raise ValueError('accepted checkpoint did not complete in twenty minutes') |
|
|
|
|
| if __name__=='__main__': |
| with httpx.Client(timeout=30,follow_redirects=False) as client: |
| |
| try: |
| import json |
| print(json.dumps(coordinate(client))) |
| except Exception: |
| raise SystemExit('Coordinator failed: verify private routing, wake capability, authentication and backup health. No scheduling success established.') from None |
|
|
