try:
from aiohttp import web
+
from .middlewares import cors
except ImportError as ie:
raise ImportError(
+ "to obtain aiohttp_cors: `pip install black[d]`"
) from None
-import black
-from black.concurrency import maybe_install_uvloop
import click
+import black
from _black_version import version as __version__
+from black.concurrency import maybe_install_uvloop
# This is used internally by tests to shut down the server prematurely
_stop_signal = asyncio.Event()
PYTHON_VARIANT_HEADER = "X-Python-Variant"
SKIP_STRING_NORMALIZATION_HEADER = "X-Skip-String-Normalization"
SKIP_MAGIC_TRAILING_COMMA = "X-Skip-Magic-Trailing-Comma"
+PREVIEW = "X-Preview"
FAST_OR_SAFE_HEADER = "X-Fast-Or-Safe"
DIFF_HEADER = "X-Diff"
PYTHON_VARIANT_HEADER,
SKIP_STRING_NORMALIZATION_HEADER,
SKIP_MAGIC_TRAILING_COMMA,
+ PREVIEW,
FAST_OR_SAFE_HEADER,
DIFF_HEADER,
]
skip_magic_trailing_comma = bool(
request.headers.get(SKIP_MAGIC_TRAILING_COMMA, False)
)
+ preview = bool(request.headers.get(PREVIEW, False))
fast = False
if request.headers.get(FAST_OR_SAFE_HEADER, "safe") == "fast":
fast = True
line_length=line_length,
string_normalization=not skip_string_normalization,
magic_trailing_comma=not skip_magic_trailing_comma,
+ preview=preview,
)
req_bytes = await request.content.read()
charset = request.charset if request.charset is not None else "utf8"
executor, partial(black.format_file_contents, req_str, fast=fast, mode=mode)
)
+ # Preserve CRLF line endings
+ if req_str[req_str.find("\n") - 1] == "\r":
+ formatted_str = formatted_str.replace("\n", "\r\n")
+ # If, after swapping line endings, nothing changed, then say so
+ if formatted_str == req_str:
+ raise black.NothingChanged
+
# Only output the diff in the HTTP response
only_diff = bool(request.headers.get(DIFF_HEADER, False))
if only_diff: