mirror of
https://github.com/bytedance/deer-flow.git
synced 2026-09-25 22:16:19 +00:00
3fdf04597e
* fix(gateway): classify Windows SVG MIME alias as active content Treat Windows' image/svg alias like the standard image/svg+xml active content type. * test(gateway): cover Windows SVG MIME alias Pin image/svg classification independently of the host MIME database. * docs(utils): document platform MIME aliases Record the shared active-content classification invariant.
45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
"""Content-sampled text/binary detection shared by routers and harness tools."""
|
|
|
|
from __future__ import annotations
|
|
|
|
from pathlib import Path
|
|
|
|
|
|
def is_text_file_by_content(path: Path, sample_size: int = 8192) -> bool:
|
|
"""Check if file is text by examining content for null bytes."""
|
|
try:
|
|
with open(path, "rb") as f:
|
|
chunk = f.read(sample_size)
|
|
# Text files shouldn't contain null bytes
|
|
return b"\x00" not in chunk
|
|
except Exception:
|
|
return False
|
|
|
|
|
|
# Exact matches include platform MIME aliases; the helper also treats every
|
|
# ``+xml`` subtype as active content.
|
|
ACTIVE_CONTENT_MIME_TYPES = {
|
|
"text/html",
|
|
"application/xhtml+xml",
|
|
"image/svg",
|
|
"image/svg+xml",
|
|
"text/xml",
|
|
"application/xml",
|
|
"text/xsl",
|
|
}
|
|
|
|
|
|
def _is_active_content_mime_type(mime_type: str | None) -> bool:
|
|
"""Return whether a browser can run script when rendering *mime_type* inline.
|
|
|
|
Beyond HTML, this covers every WHATWG XML MIME type (``text/xml``,
|
|
``application/xml``, or a ``+xml`` subtype), Windows' ``image/svg`` alias,
|
|
and ``text/xsl``, which Blink also renders as XML: any XML document can
|
|
carry an XHTML-namespaced ``<script>``, so ``report.xml`` or ``feed.rss``
|
|
is as dangerous as ``page.html`` when opened in the application origin.
|
|
"""
|
|
if mime_type is None:
|
|
return False
|
|
mime_type = mime_type.lower()
|
|
return mime_type in ACTIVE_CONTENT_MIME_TYPES or mime_type.endswith("+xml")
|