Files
ragflow/common/string_utils.py
Daniil Sivak c93ec0a1f3 Fix: reject empty/space-only content in update_chunk API (#14082)
Closes #6541

### What problem does this PR solve?

Add content validation to `update_chunk` (SDK and non-SDK) to reject
empty or whitespace-only content before it reaches the embedding model.

**Before:** Calling `update_chunk` with space-only content (like `" "`,
`""`, `"\n"`) bypassed validation and was sent directly to the embedding
model, which returned an error. This was the same bug previously fixed
for `add_chunk` in #6390, but `update_chunk` was missed.

**After:** Empty/whitespace-only content is caught by validation and
returns an error: `` `content` is required ``

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
2026-04-15 18:43:53 +08:00

78 lines
2.9 KiB
Python

#
# Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import re
def remove_redundant_spaces(txt: str):
"""
Remove redundant spaces around punctuation marks while preserving meaningful spaces.
This function performs two main operations:
1. Remove spaces after left-boundary characters (opening brackets, etc.)
2. Remove spaces before right-boundary characters (closing brackets, punctuation, etc.)
Args:
txt (str): Input text to process
Returns:
str: Text with redundant spaces removed
"""
# First pass: Remove spaces after left-boundary characters
# Matches: [non-alphanumeric-and-specific-right-punctuation] + [non-space]
# Removes spaces after characters like '(', '<', and other non-alphanumeric chars
# Examples:
# "( test" → "(test"
txt = re.sub(r"([^a-z0-9.,\)>]) +([^ ])", r"\1\2", txt, flags=re.IGNORECASE)
# Second pass: Remove spaces before right-boundary characters
# Matches: [non-space] + [non-alphanumeric-and-specific-left-punctuation]
# Removes spaces before characters like non-')', non-',', non-'.', and non-alphanumeric chars
# Examples:
# "world !" → "world!"
return re.sub(r"([^ ]) +([^a-z0-9.,\(<])", r"\1\2", txt, flags=re.IGNORECASE)
def clean_markdown_block(text):
"""
Remove Markdown code block syntax from the beginning and end of text.
This function cleans Markdown code blocks by removing:
- Opening ```Markdown tags (with optional whitespace and newlines)
- Closing ``` tags (with optional whitespace and newlines)
Args:
text (str): Input text that may be wrapped in Markdown code blocks
Returns:
str: Cleaned text with Markdown code block syntax removed, and stripped of surrounding whitespace
"""
# Remove opening ```Markdown tag with optional whitespace and newlines
# Matches: optional whitespace + ```markdown + optional whitespace + optional newline
text = re.sub(r'^\s*```markdown\s*\n?', '', text)
# Remove closing ``` tag with optional whitespace and newlines
# Matches: optional newline + optional whitespace + ``` + optional whitespace at end
text = re.sub(r'\n?\s*```\s*$', '', text)
# Return text with surrounding whitespace removed
return text.strip()
def is_content_empty(content: str) -> bool:
return content is None or not str(content).strip()