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bbfde3f | 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 | from collections.abc import Sequence
from typing import Annotated, Any, Optional, TypedDict, Union
from annotated_doc import Doc
from pydantic import BaseModel, create_model
from starlette.exceptions import HTTPException as StarletteHTTPException
from starlette.exceptions import WebSocketException as StarletteWebSocketException
class EndpointContext(TypedDict, total=False):
function: str
path: str
file: str
line: int
class HTTPException(StarletteHTTPException):
"""
An HTTP exception you can raise in your own code to show errors to the client.
This is for client errors, invalid authentication, invalid data, etc. Not for server
errors in your code.
Read more about it in the
[FastAPI docs for Handling Errors](https://fastapi.tiangolo.com/tutorial/handling-errors/).
## Example
```python
from fastapi import FastAPI, HTTPException
app = FastAPI()
items = {"foo": "The Foo Wrestlers"}
@app.get("/items/{item_id}")
async def read_item(item_id: str):
if item_id not in items:
raise HTTPException(status_code=404, detail="Item not found")
return {"item": items[item_id]}
```
"""
def __init__(
self,
status_code: Annotated[
int,
Doc(
"""
HTTP status code to send to the client.
Read more about it in the
[FastAPI docs for Handling Errors](https://fastapi.tiangolo.com/tutorial/handling-errors/#use-httpexception)
"""
),
],
detail: Annotated[
Any,
Doc(
"""
Any data to be sent to the client in the `detail` key of the JSON
response.
Read more about it in the
[FastAPI docs for Handling Errors](https://fastapi.tiangolo.com/tutorial/handling-errors/#use-httpexception)
"""
),
] = None,
headers: Annotated[
Optional[dict[str, str]],
Doc(
"""
Any headers to send to the client in the response.
Read more about it in the
[FastAPI docs for Handling Errors](https://fastapi.tiangolo.com/tutorial/handling-errors/#add-custom-headers)
"""
),
] = None,
) -> None:
super().__init__(status_code=status_code, detail=detail, headers=headers)
class WebSocketException(StarletteWebSocketException):
"""
A WebSocket exception you can raise in your own code to show errors to the client.
This is for client errors, invalid authentication, invalid data, etc. Not for server
errors in your code.
Read more about it in the
[FastAPI docs for WebSockets](https://fastapi.tiangolo.com/advanced/websockets/).
## Example
```python
from typing import Annotated
from fastapi import (
Cookie,
FastAPI,
WebSocket,
WebSocketException,
status,
)
app = FastAPI()
@app.websocket("/items/{item_id}/ws")
async def websocket_endpoint(
*,
websocket: WebSocket,
session: Annotated[str | None, Cookie()] = None,
item_id: str,
):
if session is None:
raise WebSocketException(code=status.WS_1008_POLICY_VIOLATION)
await websocket.accept()
while True:
data = await websocket.receive_text()
await websocket.send_text(f"Session cookie is: {session}")
await websocket.send_text(f"Message text was: {data}, for item ID: {item_id}")
```
"""
def __init__(
self,
code: Annotated[
int,
Doc(
"""
A closing code from the
[valid codes defined in the specification](https://datatracker.ietf.org/doc/html/rfc6455#section-7.4.1).
"""
),
],
reason: Annotated[
Union[str, None],
Doc(
"""
The reason to close the WebSocket connection.
It is UTF-8-encoded data. The interpretation of the reason is up to the
application, it is not specified by the WebSocket specification.
It could contain text that could be human-readable or interpretable
by the client code, etc.
"""
),
] = None,
) -> None:
super().__init__(code=code, reason=reason)
RequestErrorModel: type[BaseModel] = create_model("Request")
WebSocketErrorModel: type[BaseModel] = create_model("WebSocket")
class FastAPIError(RuntimeError):
"""
A generic, FastAPI-specific error.
"""
class DependencyScopeError(FastAPIError):
"""
A dependency declared that it depends on another dependency with an invalid
(narrower) scope.
"""
class ValidationException(Exception):
def __init__(
self,
errors: Sequence[Any],
*,
endpoint_ctx: Optional[EndpointContext] = None,
) -> None:
self._errors = errors
self.endpoint_ctx = endpoint_ctx
ctx = endpoint_ctx or {}
self.endpoint_function = ctx.get("function")
self.endpoint_path = ctx.get("path")
self.endpoint_file = ctx.get("file")
self.endpoint_line = ctx.get("line")
def errors(self) -> Sequence[Any]:
return self._errors
def _format_endpoint_context(self) -> str:
if not (self.endpoint_file and self.endpoint_line and self.endpoint_function):
if self.endpoint_path:
return f"\n Endpoint: {self.endpoint_path}"
return ""
context = f'\n File "{self.endpoint_file}", line {self.endpoint_line}, in {self.endpoint_function}'
if self.endpoint_path:
context += f"\n {self.endpoint_path}"
return context
def __str__(self) -> str:
message = f"{len(self._errors)} validation error{'s' if len(self._errors) != 1 else ''}:\n"
for err in self._errors:
message += f" {err}\n"
message += self._format_endpoint_context()
return message.rstrip()
class RequestValidationError(ValidationException):
def __init__(
self,
errors: Sequence[Any],
*,
body: Any = None,
endpoint_ctx: Optional[EndpointContext] = None,
) -> None:
super().__init__(errors, endpoint_ctx=endpoint_ctx)
self.body = body
class WebSocketRequestValidationError(ValidationException):
def __init__(
self,
errors: Sequence[Any],
*,
endpoint_ctx: Optional[EndpointContext] = None,
) -> None:
super().__init__(errors, endpoint_ctx=endpoint_ctx)
class ResponseValidationError(ValidationException):
def __init__(
self,
errors: Sequence[Any],
*,
body: Any = None,
endpoint_ctx: Optional[EndpointContext] = None,
) -> None:
super().__init__(errors, endpoint_ctx=endpoint_ctx)
self.body = body
class PydanticV1NotSupportedError(FastAPIError):
"""
A pydantic.v1 model is used, which is no longer supported.
"""
class FastAPIDeprecationWarning(UserWarning):
"""
A custom deprecation warning as DeprecationWarning is ignored
Ref: https://sethmlarson.dev/deprecations-via-warnings-dont-work-for-python-libraries
"""
|