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fix: keep Langflow flow names in sync files, write them world-readable

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This commit is contained in:
Jonas Miederer 2026-09-25 10:44:13 +02:00
parent 95a1c1afb7
commit 3ee997cb72
8 changed files with 58 additions and 769 deletions
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25
backend/app/flows/export.py
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@ -16,10 +16,17 @@ from pathlib import Path
FLOWS_GLOB = "*.json"
def slugify(name: str) -> str:
"""Map a flow name to a safe filename stem (lowercase, [a-z0-9-])."""
slug = re.sub(r"[^a-z0-9]+", "-", name.lower()).strip("-")
return slug or "flow"
def filename_stem(name: str) -> str:
"""Map a flow name to a filename stem, keeping the original name.
Only filesystem-reserved characters (``/ \\ : * ? " < > |`` and control
chars) become ``-``; leading/trailing whitespace and trailing dots are
stripped (Windows). Case, spaces, underscores and umlauts are preserved:
``test_flow`` stays ``test_flow``.
"""
stem = re.sub(r'[\\/:*?"<>|\x00-\x1f]', "-", name).strip()
stem = stem.rstrip(".")
return stem or "flow"
def canonical_bytes(doc: dict) -> bytes:
@ -70,7 +77,12 @@ def find_reuse_path(flows_dir: str | Path, doc: dict) -> tuple[Path | None, bool
def write_flow_bytes(target: Path, doc: dict) -> Path:
"""Write a flow document to an explicit path atomically (tmp + rename)."""
"""Write a flow document to an explicit path atomically (tmp + rename).
The file ends up world-readable (0o644): mkstemp creates 0o600, which
would lock out the other containers (Langflow/LFX run as different
users and crash on unreadable seed files).
"""
target.parent.mkdir(parents=True, exist_ok=True)
fd, tmp_name = tempfile.mkstemp(
dir=str(target.parent), prefix=f".{target.stem}-", suffix=".tmp"
@ -79,6 +91,7 @@ def write_flow_bytes(target: Path, doc: dict) -> Path:
with os.fdopen(fd, "wb") as tmp:
tmp.write(canonical_bytes(doc))
os.replace(tmp_name, target)
os.chmod(target, 0o644)
except BaseException:
try:
os.unlink(tmp_name)
@ -96,7 +109,7 @@ def write_flow_file(flows_dir: str | Path, doc: dict, *, name: str | None = None
"""
flows_dir = Path(flows_dir)
flows_dir.mkdir(parents=True, exist_ok=True)
stem = slugify(name or doc.get("name") or "flow")
stem = filename_stem(name or doc.get("name") or "flow")
return write_flow_bytes(flow_path(flows_dir, stem), doc)