dify

dify/api/controllers/common/errors.py

@@ -0,0 +1,43 @@
+from werkzeug.exceptions import HTTPException
+
+from libs.exception import BaseHTTPException
+
+
+class FilenameNotExistsError(HTTPException):
+    code = 400
+    description = "The specified filename does not exist."
+
+
+class RemoteFileUploadError(HTTPException):
+    code = 400
+    description = "Error uploading remote file."
+
+
+class FileTooLargeError(BaseHTTPException):
+    error_code = "file_too_large"
+    description = "File size exceeded. {message}"
+    code = 413
+
+
+class UnsupportedFileTypeError(BaseHTTPException):
+    error_code = "unsupported_file_type"
+    description = "File type not allowed."
+    code = 415
+
+
+class BlockedFileExtensionError(BaseHTTPException):
+    error_code = "file_extension_blocked"
+    description = "The file extension is blocked for security reasons."
+    code = 400
+
+
+class TooManyFilesError(BaseHTTPException):
+    error_code = "too_many_files"
+    description = "Only one file is allowed."
+    code = 400
+
+
+class NoFileUploadedError(BaseHTTPException):
+    error_code = "no_file_uploaded"
+    description = "Please upload your file."
+    code = 400

dify/api/controllers/common/fields.py

@@ -0,0 +1,62 @@
+from flask_restx import Api, Namespace, fields
+
+from libs.helper import AppIconUrlField
+
+parameters__system_parameters = {
+    "image_file_size_limit": fields.Integer,
+    "video_file_size_limit": fields.Integer,
+    "audio_file_size_limit": fields.Integer,
+    "file_size_limit": fields.Integer,
+    "workflow_file_upload_limit": fields.Integer,
+}
+
+
+def build_system_parameters_model(api_or_ns: Api | Namespace):
+    """Build the system parameters model for the API or Namespace."""
+    return api_or_ns.model("SystemParameters", parameters__system_parameters)
+
+
+parameters_fields = {
+    "opening_statement": fields.String,
+    "suggested_questions": fields.Raw,
+    "suggested_questions_after_answer": fields.Raw,
+    "speech_to_text": fields.Raw,
+    "text_to_speech": fields.Raw,
+    "retriever_resource": fields.Raw,
+    "annotation_reply": fields.Raw,
+    "more_like_this": fields.Raw,
+    "user_input_form": fields.Raw,
+    "sensitive_word_avoidance": fields.Raw,
+    "file_upload": fields.Raw,
+    "system_parameters": fields.Nested(parameters__system_parameters),
+}
+
+
+def build_parameters_model(api_or_ns: Api | Namespace):
+    """Build the parameters model for the API or Namespace."""
+    copied_fields = parameters_fields.copy()
+    copied_fields["system_parameters"] = fields.Nested(build_system_parameters_model(api_or_ns))
+    return api_or_ns.model("Parameters", copied_fields)
+
+
+site_fields = {
+    "title": fields.String,
+    "chat_color_theme": fields.String,
+    "chat_color_theme_inverted": fields.Boolean,
+    "icon_type": fields.String,
+    "icon": fields.String,
+    "icon_background": fields.String,
+    "icon_url": AppIconUrlField,
+    "description": fields.String,
+    "copyright": fields.String,
+    "privacy_policy": fields.String,
+    "custom_disclaimer": fields.String,
+    "default_language": fields.String,
+    "show_workflow_steps": fields.Boolean,
+    "use_icon_as_answer_icon": fields.Boolean,
+}
+
+
+def build_site_model(api_or_ns: Api | Namespace):
+    """Build the site model for the API or Namespace."""
+    return api_or_ns.model("Site", site_fields)

dify/api/controllers/common/helpers.py

@@ -0,0 +1,84 @@
+import contextlib
+import mimetypes
+import os
+import platform
+import re
+import urllib.parse
+import warnings
+from uuid import uuid4
+
+import httpx
+
+try:
+    import magic
+except ImportError:
+    if platform.system() == "Windows":
+        warnings.warn(
+            "To use python-magic guess MIMETYPE, you need to run `pip install python-magic-bin`", stacklevel=2
+        )
+    elif platform.system() == "Darwin":
+        warnings.warn("To use python-magic guess MIMETYPE, you need to run `brew install libmagic`", stacklevel=2)
+    elif platform.system() == "Linux":
+        warnings.warn(
+            "To use python-magic guess MIMETYPE, you need to run `sudo apt-get install libmagic1`", stacklevel=2
+        )
+    else:
+        warnings.warn("To use python-magic guess MIMETYPE, you need to install `libmagic`", stacklevel=2)
+    magic = None  # type: ignore[assignment]
+
+from pydantic import BaseModel
+
+
+class FileInfo(BaseModel):
+    filename: str
+    extension: str
+    mimetype: str
+    size: int
+
+
+def guess_file_info_from_response(response: httpx.Response):
+    url = str(response.url)
+    # Try to extract filename from URL
+    parsed_url = urllib.parse.urlparse(url)
+    url_path = parsed_url.path
+    filename = os.path.basename(url_path)
+
+    # If filename couldn't be extracted, use Content-Disposition header
+    if not filename:
+        content_disposition = response.headers.get("Content-Disposition")
+        if content_disposition:
+            filename_match = re.search(r'filename="?(.+)"?', content_disposition)
+            if filename_match:
+                filename = filename_match.group(1)
+
+    # If still no filename, generate a unique one
+    if not filename:
+        unique_name = str(uuid4())
+        filename = f"{unique_name}"
+
+    # Guess MIME type from filename first, then URL
+    mimetype, _ = mimetypes.guess_type(filename)
+    if mimetype is None:
+        mimetype, _ = mimetypes.guess_type(url)
+    if mimetype is None:
+        # If guessing fails, use Content-Type from response headers
+        mimetype = response.headers.get("Content-Type", "application/octet-stream")
+
+    # Use python-magic to guess MIME type if still unknown or generic
+    if mimetype == "application/octet-stream" and magic is not None:
+        with contextlib.suppress(magic.MagicException):
+            mimetype = magic.from_buffer(response.content[:1024], mime=True)
+
+    extension = os.path.splitext(filename)[1]
+
+    # Ensure filename has an extension
+    if not extension:
+        extension = mimetypes.guess_extension(mimetype) or ".bin"
+        filename = f"{filename}{extension}"
+
+    return FileInfo(
+        filename=filename,
+        extension=extension,
+        mimetype=mimetype,
+        size=int(response.headers.get("Content-Length", -1)),
+    )