File size: 9,347 Bytes
20f348c |
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 |
import mimetypes
import uuid
from collections.abc import Callable, Mapping, Sequence
from typing import Any, cast
import httpx
from sqlalchemy import select
from constants import AUDIO_EXTENSIONS, DOCUMENT_EXTENSIONS, IMAGE_EXTENSIONS, VIDEO_EXTENSIONS
from core.file import File, FileBelongsTo, FileTransferMethod, FileType, FileUploadConfig
from core.helper import ssrf_proxy
from extensions.ext_database import db
from models import MessageFile, ToolFile, UploadFile
def build_from_message_files(
*,
message_files: Sequence["MessageFile"],
tenant_id: str,
config: FileUploadConfig,
) -> Sequence[File]:
results = [
build_from_message_file(message_file=file, tenant_id=tenant_id, config=config)
for file in message_files
if file.belongs_to != FileBelongsTo.ASSISTANT
]
return results
def build_from_message_file(
*,
message_file: "MessageFile",
tenant_id: str,
config: FileUploadConfig,
):
mapping = {
"transfer_method": message_file.transfer_method,
"url": message_file.url,
"id": message_file.id,
"type": message_file.type,
"upload_file_id": message_file.upload_file_id,
}
return build_from_mapping(
mapping=mapping,
tenant_id=tenant_id,
config=config,
)
def build_from_mapping(
*,
mapping: Mapping[str, Any],
tenant_id: str,
config: FileUploadConfig | None = None,
) -> File:
transfer_method = FileTransferMethod.value_of(mapping.get("transfer_method"))
build_functions: dict[FileTransferMethod, Callable] = {
FileTransferMethod.LOCAL_FILE: _build_from_local_file,
FileTransferMethod.REMOTE_URL: _build_from_remote_url,
FileTransferMethod.TOOL_FILE: _build_from_tool_file,
}
build_func = build_functions.get(transfer_method)
if not build_func:
raise ValueError(f"Invalid file transfer method: {transfer_method}")
file: File = build_func(
mapping=mapping,
tenant_id=tenant_id,
transfer_method=transfer_method,
)
if config and not _is_file_valid_with_config(
input_file_type=mapping.get("type", FileType.CUSTOM),
file_extension=file.extension or "",
file_transfer_method=file.transfer_method,
config=config,
):
raise ValueError(f"File validation failed for file: {file.filename}")
return file
def build_from_mappings(
*,
mappings: Sequence[Mapping[str, Any]],
config: FileUploadConfig | None = None,
tenant_id: str,
) -> Sequence[File]:
files = [
build_from_mapping(
mapping=mapping,
tenant_id=tenant_id,
config=config,
)
for mapping in mappings
]
if (
config
# If image config is set.
and config.image_config
# And the number of image files exceeds the maximum limit
and sum(1 for _ in (filter(lambda x: x.type == FileType.IMAGE, files))) > config.image_config.number_limits
):
raise ValueError(f"Number of image files exceeds the maximum limit {config.image_config.number_limits}")
if config and config.number_limits and len(files) > config.number_limits:
raise ValueError(f"Number of files exceeds the maximum limit {config.number_limits}")
return files
def _build_from_local_file(
*,
mapping: Mapping[str, Any],
tenant_id: str,
transfer_method: FileTransferMethod,
) -> File:
upload_file_id = mapping.get("upload_file_id")
if not upload_file_id:
raise ValueError("Invalid upload file id")
# check if upload_file_id is a valid uuid
try:
uuid.UUID(upload_file_id)
except ValueError:
raise ValueError("Invalid upload file id format")
stmt = select(UploadFile).where(
UploadFile.id == upload_file_id,
UploadFile.tenant_id == tenant_id,
)
row = db.session.scalar(stmt)
if row is None:
raise ValueError("Invalid upload file")
file_type = FileType(mapping.get("type", "custom"))
file_type = _standardize_file_type(file_type, extension="." + row.extension, mime_type=row.mime_type)
return File(
id=mapping.get("id"),
filename=row.name,
extension="." + row.extension,
mime_type=row.mime_type,
tenant_id=tenant_id,
type=file_type,
transfer_method=transfer_method,
remote_url=row.source_url,
related_id=mapping.get("upload_file_id"),
size=row.size,
storage_key=row.key,
)
def _build_from_remote_url(
*,
mapping: Mapping[str, Any],
tenant_id: str,
transfer_method: FileTransferMethod,
) -> File:
url = mapping.get("url") or mapping.get("remote_url")
if not url:
raise ValueError("Invalid file url")
mime_type, filename, file_size = _get_remote_file_info(url)
extension = mimetypes.guess_extension(mime_type) or "." + filename.split(".")[-1] if "." in filename else ".bin"
file_type = FileType(mapping.get("type", "custom"))
file_type = _standardize_file_type(file_type, extension=extension, mime_type=mime_type)
return File(
id=mapping.get("id"),
filename=filename,
tenant_id=tenant_id,
type=file_type,
transfer_method=transfer_method,
remote_url=url,
mime_type=mime_type,
extension=extension,
size=file_size,
storage_key="",
)
def _get_remote_file_info(url: str):
file_size = -1
filename = url.split("/")[-1].split("?")[0] or "unknown_file"
mime_type = mimetypes.guess_type(filename)[0] or ""
resp = ssrf_proxy.head(url, follow_redirects=True)
resp = cast(httpx.Response, resp)
if resp.status_code == httpx.codes.OK:
if content_disposition := resp.headers.get("Content-Disposition"):
filename = str(content_disposition.split("filename=")[-1].strip('"'))
file_size = int(resp.headers.get("Content-Length", file_size))
mime_type = mime_type or str(resp.headers.get("Content-Type", ""))
return mime_type, filename, file_size
def _build_from_tool_file(
*,
mapping: Mapping[str, Any],
tenant_id: str,
transfer_method: FileTransferMethod,
) -> File:
tool_file = (
db.session.query(ToolFile)
.filter(
ToolFile.id == mapping.get("tool_file_id"),
ToolFile.tenant_id == tenant_id,
)
.first()
)
if tool_file is None:
raise ValueError(f"ToolFile {mapping.get('tool_file_id')} not found")
extension = "." + tool_file.file_key.split(".")[-1] if "." in tool_file.file_key else ".bin"
file_type = FileType(mapping.get("type", "custom"))
file_type = _standardize_file_type(file_type, extension=extension, mime_type=tool_file.mimetype)
return File(
id=mapping.get("id"),
tenant_id=tenant_id,
filename=tool_file.name,
type=file_type,
transfer_method=transfer_method,
remote_url=tool_file.original_url,
related_id=tool_file.id,
extension=extension,
mime_type=tool_file.mimetype,
size=tool_file.size,
storage_key=tool_file.file_key,
)
def _is_file_valid_with_config(
*,
input_file_type: str,
file_extension: str,
file_transfer_method: FileTransferMethod,
config: FileUploadConfig,
) -> bool:
if (
config.allowed_file_types
and input_file_type not in config.allowed_file_types
and input_file_type != FileType.CUSTOM
):
return False
if (
input_file_type == FileType.CUSTOM
and config.allowed_file_extensions is not None
and file_extension not in config.allowed_file_extensions
):
return False
if input_file_type == FileType.IMAGE and config.image_config:
if config.image_config.transfer_methods and file_transfer_method not in config.image_config.transfer_methods:
return False
return True
def _standardize_file_type(file_type: FileType, /, *, extension: str = "", mime_type: str = "") -> FileType:
"""
If custom type, try to guess the file type by extension and mime_type.
"""
if file_type != FileType.CUSTOM:
return FileType(file_type)
guessed_type = None
if extension:
guessed_type = _get_file_type_by_extension(extension)
if guessed_type is None and mime_type:
guessed_type = _get_file_type_by_mimetype(mime_type)
return guessed_type or FileType.CUSTOM
def _get_file_type_by_extension(extension: str) -> FileType | None:
extension = extension.lstrip(".")
if extension in IMAGE_EXTENSIONS:
return FileType.IMAGE
elif extension in VIDEO_EXTENSIONS:
return FileType.VIDEO
elif extension in AUDIO_EXTENSIONS:
return FileType.AUDIO
elif extension in DOCUMENT_EXTENSIONS:
return FileType.DOCUMENT
return None
def _get_file_type_by_mimetype(mime_type: str) -> FileType | None:
if "image" in mime_type:
file_type = FileType.IMAGE
elif "video" in mime_type:
file_type = FileType.VIDEO
elif "audio" in mime_type:
file_type = FileType.AUDIO
elif "text" in mime_type or "pdf" in mime_type:
file_type = FileType.DOCUMENT
else:
file_type = FileType.CUSTOM
return file_type
|