PCv5/app/utils/validators/file.py

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from flask_login import current_user
from wtforms.validators import ValidationError, StopValidation
from werkzeug.utils import secure_filename
from app.utils.filesize import filesize
import re
def optional(form, files):
if(len(files.data) == 0 or files.data[0].filename == ""):
raise StopValidation()
def count(form, files):
if current_user.is_authenticated:
if current_user.priv("no-upload-limits"):
return
if len(files.data) > 100: # 100 files for a authenticated user
raise ValidationError("100 fichiers maximum autorisés")
else:
if len(files.data) > 3:
raise ValidationError("3 fichiers maximum autorisés")
def extension(form, files):
valid_extensions = [
"g[123][a-z]|cpa|c1a|fxi|cat|mcs|xcp|fls", # Casio files
"png|jpg|jpeg|bmp|tiff|gif|xcf", # Images
"[ch](pp|\+\+|xx)?|s|py|bide|lua|lc", # Source code
"txt|md|tex|pdf|odt|ods|docx|xlsx", # Office files
"zip|7z|tar|bz2?|t?gz|xz|zst", # Archives
]
r = re.compile("|".join(valid_extensions), re.IGNORECASE)
errors = []
for f in files.data:
name = secure_filename(f.filename)
ext = name.split(".")[-1]
if not r.fullmatch(ext):
errors.append("." + ext)
if len(errors) > 0:
raise ValidationError(f"Extension(s) invalide(s) ({', '.join(errors)})")
def size(form, files):
"""There is no global limit to file sizes"""
size = sum([filesize(f) for f in files.data])
if current_user.is_authenticated:
if current_user.priv("no-upload-limits"):
return
if size > 5e6: # 5 Mo per comment for an authenticated user
raise ValidationError("Fichiers trop lourds (max 5Mo)")
else:
if size > 500e3: # 500 ko per comment for a guest
raise ValidationError("Fichiers trop lourds (max 500ko)")
def namelength(form, files):
errors = []
for f in files.data:
name = secure_filename(f.filename)
if len(name) > 64:
errors.append(f.filename)
if len(errors) > 0:
raise ValidationError(f"Noms trop longs, 64 caractères max " \
f"({', '.join(errors)})")