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7131bbe 4fc704d 7131bbe 4fc704d 7131bbe | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | """Storage backends."""
from __future__ import annotations
import json
from dataclasses import dataclass
from pathlib import Path
from typing import Any, Protocol
from .checksum import sha256_hex
from .config import ConfigurationError, Settings
from .models import CampaignManifest, GeneratedMedia, StoredObject
class StorageBackend(Protocol):
name: str
def put_media(self, campaign_id: str, media: GeneratedMedia) -> StoredObject: ...
def put_manifest(self, campaign_id: str, manifest: CampaignManifest) -> StoredObject: ...
def _manifest_bytes(manifest: CampaignManifest) -> bytes:
return manifest.model_dump_json(indent=2).encode("utf-8")
def _endpoint_with_scheme(endpoint_url: str) -> str:
endpoint = endpoint_url.strip()
if endpoint and "://" not in endpoint:
return f"https://{endpoint}"
return endpoint
class LocalStorageBackend:
"""Filesystem storage used for tests and credential-free demos."""
name = "local"
def __init__(self, root: Path | str = "var/storage") -> None:
self.root = Path(root)
def put_media(self, campaign_id: str, media: GeneratedMedia) -> StoredObject:
return self.put_bytes(
campaign_id=campaign_id,
filename=media.filename,
data=media.data,
content_type=media.content_type,
)
def put_manifest(self, campaign_id: str, manifest: CampaignManifest) -> StoredObject:
return self.put_bytes(
campaign_id=campaign_id,
filename=f"{campaign_id}-manifest.json",
data=_manifest_bytes(manifest),
content_type="application/json",
)
def put_bytes(
self, campaign_id: str, filename: str, data: bytes, content_type: str
) -> StoredObject:
del content_type
folder = self.root / campaign_id
folder.mkdir(parents=True, exist_ok=True)
path = folder / filename
path.write_bytes(data)
relative = path.relative_to(self.root)
return StoredObject(
storage_backend=self.name,
storage_key=str(relative),
public_url=f"/storage/{relative.as_posix()}",
sha256=sha256_hex(data),
bytes_size=len(data),
)
def read_bytes(self, storage_key: str) -> bytes:
path = (self.root / storage_key).resolve()
root = self.root.resolve()
if root not in path.parents:
raise ConfigurationError(f"Refusing to read outside storage root: {storage_key}")
return path.read_bytes()
@dataclass
class B2StorageBackend:
"""Backblaze B2 S3-compatible storage backend.
The backend is intentionally explicit: if `PROOFFRAME_STORAGE_BACKEND=b2` is used,
missing config raises before any silent local fallback can happen.
"""
endpoint_url: str
bucket: str
key_id: str
application_key: str
public_base_url: str = ""
client: Any | None = None
name = "b2"
def __post_init__(self) -> None:
self.endpoint_url = _endpoint_with_scheme(self.endpoint_url)
@classmethod
def from_settings(cls, settings: Settings) -> "B2StorageBackend":
settings.require_b2()
return cls(
endpoint_url=settings.b2_endpoint_url,
bucket=settings.b2_bucket,
key_id=settings.b2_key_id,
application_key=settings.b2_application_key,
public_base_url=settings.b2_public_base_url,
)
def _client(self) -> Any:
if self.client is not None:
return self.client
try:
import boto3 # type: ignore[import-not-found]
except ModuleNotFoundError as exc:
raise ConfigurationError(
"B2 storage requires boto3. Install with `pip install -e '.[integrations]'`."
) from exc
self.client = boto3.client(
"s3",
endpoint_url=self.endpoint_url,
aws_access_key_id=self.key_id,
aws_secret_access_key=self.application_key,
)
return self.client
def put_media(self, campaign_id: str, media: GeneratedMedia) -> StoredObject:
return self.put_bytes(
key=f"campaigns/{campaign_id}/media/{media.filename}",
data=media.data,
content_type=media.content_type,
metadata={
"campaign-id": campaign_id,
"provider": media.provider,
"model": media.model,
"sha256": sha256_hex(media.data),
},
)
def put_manifest(self, campaign_id: str, manifest: CampaignManifest) -> StoredObject:
data = _manifest_bytes(manifest)
return self.put_bytes(
key=f"campaigns/{campaign_id}/manifests/{campaign_id}-manifest.json",
data=data,
content_type="application/json",
metadata={"campaign-id": campaign_id, "sha256": sha256_hex(data)},
)
def put_bytes(
self, key: str, data: bytes, content_type: str, metadata: dict[str, str] | None = None
) -> StoredObject:
checksum = sha256_hex(data)
self._client().put_object(
Bucket=self.bucket,
Key=key,
Body=data,
ContentType=content_type,
Metadata=metadata or {"sha256": checksum},
)
public_url = f"{self.public_base_url.rstrip('/')}/{key}" if self.public_base_url else None
return StoredObject(
storage_backend=self.name,
storage_key=key,
public_url=public_url,
sha256=checksum,
bytes_size=len(data),
)
def create_storage_backend(settings: Settings) -> StorageBackend:
if settings.storage_backend == "local":
return LocalStorageBackend(settings.storage_root)
if settings.storage_backend == "b2":
return B2StorageBackend.from_settings(settings)
raise ConfigurationError(f"Unknown storage backend: {settings.storage_backend}")
def manifest_to_plain_json(manifest: CampaignManifest) -> dict[str, Any]:
return json.loads(manifest.model_dump_json())
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