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add tool file preview

This commit is contained in:
jyong 2025-08-07 14:35:04 +08:00
parent 842ced218e
commit e6f1bc165c
1 changed files with 24 additions and 4 deletions
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28
api/models/dataset.py
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@ -784,7 +784,7 @@ class DocumentSegment(Base):
text = self.content
# For data before v0.10.0
pattern = r"/files/([a-f0-9\-]+)/image-preview"
pattern = r"/files/([a-f0-9\-]+)/image-preview(?:\?.*?)?"
matches = re.finditer(pattern, text)
for match in matches:
upload_file_id = match.group(1)
@ -796,11 +796,12 @@ class DocumentSegment(Base):
encoded_sign = base64.urlsafe_b64encode(sign).decode()
params = f"timestamp={timestamp}&nonce={nonce}&sign={encoded_sign}"
signed_url = f"{match.group(0)}?{params}"
base_url = f"/files/{upload_file_id}/image-preview"
signed_url = f"{base_url}?{params}"
signed_urls.append((match.start(), match.end(), signed_url))
# For data after v0.10.0
pattern = r"/files/([a-f0-9\-]+)/file-preview"
pattern = r"/files/([a-f0-9\-]+)/file-preview(?:\?.*?)?"
matches = re.finditer(pattern, text)
for match in matches:
upload_file_id = match.group(1)
@ -812,7 +813,26 @@ class DocumentSegment(Base):
encoded_sign = base64.urlsafe_b64encode(sign).decode()
params = f"timestamp={timestamp}&nonce={nonce}&sign={encoded_sign}"
signed_url = f"{match.group(0)}?{params}"
base_url = f"/files/{upload_file_id}/file-preview"
signed_url = f"{base_url}?{params}"
signed_urls.append((match.start(), match.end(), signed_url))
# For tools directory - direct file formats (e.g., .png, .jpg, etc.)
pattern = r"/files/tools/([a-f0-9\-]+)\.([a-zA-Z0-9]+)(?:\?.*?)?"
matches = re.finditer(pattern, text)
for match in matches:
upload_file_id = match.group(1)
file_extension = match.group(2)
nonce = os.urandom(16).hex()
timestamp = str(int(time.time()))
data_to_sign = f"file-preview|{upload_file_id}|{timestamp}|{nonce}"
secret_key = dify_config.SECRET_KEY.encode() if dify_config.SECRET_KEY else b""
sign = hmac.new(secret_key, data_to_sign.encode(), hashlib.sha256).digest()
encoded_sign = base64.urlsafe_b64encode(sign).decode()
params = f"timestamp={timestamp}&nonce={nonce}&sign={encoded_sign}"
base_url = f"/files/tools/{upload_file_id}.{file_extension}"
signed_url = f"{base_url}?{params}"
signed_urls.append((match.start(), match.end(), signed_url))
# Reconstruct the text with signed URLs