feat: support image uploads in direct review flow
- accept png/jpg/jpeg in the uploaded-contract review path - add local image OCR extraction and quality gating - keep existing PDF/DOCX/TXT review behavior intact Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
@@ -19,6 +19,10 @@ try:
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from pytesseract import Output as TesseractOutput
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except ImportError: # pragma: no cover - optional local dependency path
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pytesseract = None
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try:
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from PIL import Image
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except ImportError: # pragma: no cover - optional local dependency path
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Image = None
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from fastapi import HTTPException, status
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from reportlab.lib.pagesizes import A4
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from reportlab.pdfbase import pdfmetrics
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@@ -312,11 +316,16 @@ PDF_SOURCE_KIND_UNKNOWN = "unknown_pdf"
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SUPPORTED_TEXT_SUFFIXES = (".txt", ".md", ".csv", ".json")
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DOCX_SUFFIX = ".docx"
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PDF_SUFFIX = ".pdf"
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SUPPORTED_REVIEW_UPLOAD_SUFFIXES = (PDF_SUFFIX, DOCX_SUFFIX, ".txt")
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IMAGE_PNG_SUFFIX = ".png"
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IMAGE_JPG_SUFFIXES = (".jpg", ".jpeg")
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SUPPORTED_REVIEW_IMAGE_SUFFIXES = (IMAGE_PNG_SUFFIX, *IMAGE_JPG_SUFFIXES)
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SUPPORTED_REVIEW_UPLOAD_SUFFIXES = (PDF_SUFFIX, DOCX_SUFFIX, ".txt", *SUPPORTED_REVIEW_IMAGE_SUFFIXES)
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SUPPORTED_REVIEW_UPLOAD_MIME_TYPES = (
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"application/pdf",
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"application/vnd.openxmlformats-officedocument.wordprocessingml.document",
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"text/plain",
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"image/png",
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"image/jpeg",
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)
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PDF_FONT_NAME = "STSong-Light"
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pdfmetrics.registerFont(UnicodeCIDFont(PDF_FONT_NAME))
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@@ -584,6 +593,68 @@ class ReviewService:
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},
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}
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def _extract_text_from_image_with_ocr(self, file_bytes: bytes) -> Dict[str, Any]:
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image_source = {
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"kind": "image_upload",
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"page_count": 1,
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"text_pages": 0,
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"image_pages": 1,
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}
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if Image is None or pytesseract is None:
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return {
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"text": None,
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"failure_message": "检测到图片合同，但 OCR 运行时不可用，请改用更清晰的图片、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。",
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"metadata": {
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"document_kind": image_source["kind"],
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"extraction_mode": "ocr_runtime_missing",
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"ocr_gate_status": OCR_GATE_BLOCK,
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"ocr_quality": {"status": OCR_GATE_BLOCK, "char_count": 0, "failure_message": "ocr runtime missing"},
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},
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}
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try:
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image = Image.open(io.BytesIO(file_bytes))
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image = image.convert("RGB")
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data = pytesseract.image_to_data(image, lang="chi_sim+eng", output_type=TesseractOutput.DICT)
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words = [str(item).strip() for item in data.get("text", []) if str(item).strip()]
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confidences: List[float] = []
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for conf in data.get("conf", []):
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try:
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conf_value = float(conf)
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except (TypeError, ValueError):
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continue
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if conf_value >= 0:
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confidences.append(conf_value)
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text = self._normalize_extracted_text(" ".join(words))
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quality = self._evaluate_ocr_quality(text, confidences, image_source)
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if quality["status"] == OCR_GATE_BLOCK:
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failure_message = "检测到图片合同，但 OCR 识别质量不足，请上传更清晰的图片、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。"
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elif quality["status"] == OCR_GATE_WARN:
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failure_message = "已通过 OCR 提取图片文本，但识别质量一般，建议人工复核原图后再使用审查结果。"
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else:
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failure_message = None
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quality["failure_message"] = failure_message
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return {
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"text": text if quality["status"] != OCR_GATE_BLOCK else None,
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"failure_message": failure_message,
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"metadata": {
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"document_kind": image_source["kind"],
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"extraction_mode": "ocr",
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"ocr_gate_status": quality["status"],
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"ocr_quality": quality,
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},
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}
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except Exception:
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return {
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"text": None,
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"failure_message": "检测到图片合同，但 OCR 解析失败，请改用更清晰的图片、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。",
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"metadata": {
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"document_kind": image_source["kind"],
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"extraction_mode": "ocr_parse_failed",
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"ocr_gate_status": OCR_GATE_BLOCK,
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"ocr_quality": {"status": OCR_GATE_BLOCK, "char_count": 0, "failure_message": "ocr parse failed"},
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},
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}
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def _looks_like_platform_review_report_file_name(self, normalized_name: str) -> bool:
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return "review-report" in (normalized_name or "") or "审查报告" in (normalized_name or "")
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@@ -795,8 +866,8 @@ class ReviewService:
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return self._extract_text_from_file(file_bytes, file_name)
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def extract_review_upload_text(self, file_bytes: bytes, file_name: Optional[str]) -> Dict[str, Optional[str]]:
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text = self.extract_text_from_file(file_bytes=file_bytes, file_name=file_name)
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normalized_name = (file_name or "").lower()
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text = None if normalized_name.endswith(SUPPORTED_REVIEW_IMAGE_SUFFIXES) else self.extract_text_from_file(file_bytes=file_bytes, file_name=file_name)
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extraction_metadata: Dict[str, Any] = {
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"document_kind": None,
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"extraction_mode": "text",
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@@ -837,9 +908,20 @@ class ReviewService:
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},
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}
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if normalized_name.endswith(SUPPORTED_REVIEW_IMAGE_SUFFIXES):
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ocr_result = self._extract_text_from_image_with_ocr(file_bytes)
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return {
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"text": ocr_result["text"],
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"failure_message": ocr_result["failure_message"],
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"metadata": {
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**extraction_metadata,
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**ocr_result["metadata"],
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},
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}
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return {
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"text": text,
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"failure_message": "无法从上传文件中提取可审查文本，请改为可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。",
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"failure_message": "无法从上传文件中提取可审查文本，请改为可复制文本 PDF / DOCX / TXT / PNG / JPG / JPEG，或直接粘贴合同正文。",
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"metadata": extraction_metadata,
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}
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@@ -849,20 +931,23 @@ class ReviewService:
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suffix = Path(file_name).suffix.lower()
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if suffix not in SUPPORTED_REVIEW_UPLOAD_SUFFIXES:
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raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="仅支持 PDF / DOCX / TXT 文件")
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raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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normalized_mime = (mime_type or "").strip().lower()
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if normalized_mime and not any(normalized_mime.startswith(allowed) for allowed in SUPPORTED_REVIEW_UPLOAD_MIME_TYPES):
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raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="仅支持 PDF / DOCX / TXT 文件")
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raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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detected_type = self._detect_review_upload_type(file_bytes)
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expected_type = {
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PDF_SUFFIX: "pdf",
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DOCX_SUFFIX: "docx",
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".txt": "txt",
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IMAGE_PNG_SUFFIX: "png",
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".jpg": "jpg",
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".jpeg": "jpg",
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}[suffix]
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if detected_type != expected_type:
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raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="仅支持 PDF / DOCX / TXT 文件")
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raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def _detect_review_upload_type(self, file_bytes: bytes) -> str:
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if file_bytes.startswith(b"%PDF"):
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@@ -877,6 +962,8 @@ class ReviewService:
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return "unknown"
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if file_bytes.startswith(b"\x89PNG\r\n\x1a\n"):
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return "png"
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if file_bytes.startswith(b"\xff\xd8\xff"):
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return "jpg"
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if file_bytes.startswith(b"MZ"):
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return "exe"
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if not file_bytes:
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@@ -780,6 +780,43 @@ class ReviewServiceTestCase(unittest.TestCase):
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self.assertEqual(result["metadata"]["ocr_gate_status"], "BLOCK")
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self.assertIn("OCR 识别质量不足", result["failure_message"])
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def test_extract_review_upload_text_uses_ocr_for_image_upload(self):
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self.service._extract_text_from_image_with_ocr = lambda file_bytes: {
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"text": "图片合同正文\n付款安排",
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"failure_message": "已通过 OCR 提取图片文本，但识别质量一般，建议人工复核原图后再使用审查结果。",
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"metadata": {
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"document_kind": "image_upload",
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"extraction_mode": "ocr",
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"ocr_gate_status": "WARN",
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"ocr_quality": {"status": "WARN", "char_count": 12},
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},
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}
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result = self.service.extract_review_upload_text(b"\x89PNG\r\n\x1a\nmock-image", "contract.png")
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self.assertEqual(result["text"], "图片合同正文\n付款安排")
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self.assertEqual(result["metadata"]["document_kind"], "image_upload")
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self.assertEqual(result["metadata"]["ocr_gate_status"], "WARN")
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def test_validate_review_upload_accepts_supported_image_suffix(self):
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self.service.validate_review_upload("contract.png", "image/png", b"\x89PNG\r\n\x1a\nmock-image")
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self.service.validate_review_upload("contract.jpg", "image/jpeg", b"\xff\xd8\xffmock-jpeg")
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self.service.validate_review_upload("contract.jpeg", "image/jpeg", b"\xff\xd8\xffmock-jpeg")
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def test_validate_review_upload_rejects_png_renamed_as_txt(self):
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with self.assertRaises(HTTPException) as context:
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self.service.validate_review_upload("contract.txt", "text/plain", b"\x89PNG\r\n\x1a\n")
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self.assertEqual(context.exception.status_code, 400)
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def test_validate_review_upload_rejects_jpg_renamed_as_txt(self):
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with self.assertRaises(HTTPException) as context:
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self.service.validate_review_upload("contract.txt", "text/plain", b"\xff\xd8\xfffake-jpeg")
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self.assertEqual(context.exception.status_code, 400)
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def test_build_clauses_from_text_groups_multiline_sections_and_skips_metadata(self):
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clauses = self.service._build_clauses_from_text(
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"\n".join(
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@@ -940,17 +977,10 @@ class ReviewServiceTestCase(unittest.TestCase):
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def test_validate_review_upload_rejects_unsupported_suffix(self):
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with self.assertRaises(HTTPException) as context:
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self.service.validate_review_upload("contract.png", "image/png", b"\x89PNG\r\n\x1a\n")
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self.service.validate_review_upload("contract.exe", "application/octet-stream", b"MZ")
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self.assertEqual(context.exception.status_code, 400)
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT 文件")
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def test_validate_review_upload_rejects_png_renamed_as_txt(self):
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with self.assertRaises(HTTPException) as context:
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self.service.validate_review_upload("contract.txt", "text/plain", b"\x89PNG\r\n\x1a\n")
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self.assertEqual(context.exception.status_code, 400)
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT 文件")
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def test_validate_review_upload_rejects_exe_renamed_as_docx(self):
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with self.assertRaises(HTTPException) as context:
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@@ -961,7 +991,7 @@ class ReviewServiceTestCase(unittest.TestCase):
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)
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self.assertEqual(context.exception.status_code, 400)
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT 文件")
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self.assertEqual(context.exception.detail, "仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def test_evaluate_ocr_quality_returns_pass_for_clean_text(self):
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quality = self.service._evaluate_ocr_quality(
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@@ -38,6 +38,17 @@ class StubReviewService:
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"ocr_quality": {"status": "WARN", "char_count": 12},
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},
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}
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if file_name.endswith(".png") or file_name.endswith(".jpg") or file_name.endswith(".jpeg"):
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return {
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"text": "图片合同正文\n付款安排",
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"failure_message": "已通过 OCR 提取图片文本，但识别质量一般，建议人工复核原图后再使用审查结果。",
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"metadata": {
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"document_kind": "image_upload",
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"extraction_mode": "ocr",
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"ocr_gate_status": "WARN",
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"ocr_quality": {"status": "WARN", "char_count": 12},
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},
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}
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text = self.extract_text_from_file(file_bytes, file_name)
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return {
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"text": text,
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@@ -50,8 +61,8 @@ class StubReviewService:
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}
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def validate_review_upload(self, file_name, mime_type, file_bytes):
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if file_name.endswith(".png") or file_name.endswith(".exe") or file_bytes.startswith(b"\x89PNG") or file_bytes.startswith(b"MZ"):
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raise HTTPException(status_code=400, detail="仅支持 PDF / DOCX / TXT 文件")
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if file_name.endswith(".exe") or file_bytes.startswith(b"MZ"):
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raise HTTPException(status_code=400, detail="仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def create_review_task(self, tenant_id, user_id, review_as, contract_type, text, file_name, extracted_text=None, extraction_metadata=None):
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return {
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@@ -283,15 +294,30 @@ class ReviewsApiTestCase(unittest.TestCase):
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body = response.json()
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self.assertEqual(body["code"], 40001)
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def test_create_review_accepts_image_file_for_ocr_review(self):
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response = self.client.post(
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"/api/v1/reviews",
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data={"review_as": "party_a"},
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files={"file": ("contract.png", b"\x89PNG\r\n\x1a\nmock-image", "image/png")},
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)
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self.assertEqual(response.status_code, 200)
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body = response.json()
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self.assertEqual(body["code"], 0)
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self.assertEqual(body["data"]["file_name"], "contract.png")
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self.assertEqual(body["data"]["merged_text"], "图片合同正文\n付款安排")
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self.assertEqual(body["data"]["extraction_metadata"]["document_kind"], "image_upload")
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self.assertEqual(body["data"]["extraction_metadata"]["ocr_gate_status"], "WARN")
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def test_create_review_rejects_unsupported_file_type(self):
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response = self.client.post(
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"/api/v1/reviews",
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data={"review_as": "party_a"},
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files={"file": ("contract.png", b"png", "image/png")},
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files={"file": ("contract.exe", b"MZfake-executable", "application/octet-stream")},
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)
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self.assertEqual(response.status_code, 400)
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self.assertEqual(response.json()["message"], "仅支持 PDF / DOCX / TXT 文件")
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self.assertEqual(response.json()["message"], "仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件")
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def test_create_review_rejects_unextractable_supported_file_without_text_fallback(self):
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class UnextractableReviewService(StubReviewService):
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@@ -12,7 +12,7 @@ import { createReview } from "@/services/review";
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const { Dragger } = Upload;
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const { Title, Text } = Typography;
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const SUPPORTED_REVIEW_FILE_EXTENSIONS = [".pdf", ".docx", ".txt"];
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const SUPPORTED_REVIEW_FILE_EXTENSIONS = [".pdf", ".docx", ".txt", ".png", ".jpg", ".jpeg"];
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function isSupportedReviewFile(fileName: string) {
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const normalized = fileName.toLowerCase();
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@@ -25,7 +25,7 @@ type ReviewFormValues = {
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text?: string;
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};
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const reviewHighlights = ["直接审核客户现有合同", "支持 PDF / DOCX / TXT 上传", "扫描 PDF 可先走 OCR", "可叠加补充文本说明", "提交后自动进入结果详情页"];
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const reviewHighlights = ["直接审核客户现有合同", "支持 PDF / DOCX / TXT / PNG / JPG / JPEG 上传", "扫描 PDF 和图片可先走 OCR", "可叠加补充文本说明", "提交后自动进入结果详情页"];
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type SubmissionGuidance = {
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type: "info" | "warning" | "error";
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@@ -57,35 +57,35 @@ function buildSubmissionGuidance(message: string): SubmissionGuidance | null {
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return {
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type: "warning",
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title: "当前上传的是平台审查报告，不是合同原文",
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description: "请改为上传合同原文 PDF / DOCX / TXT，或直接粘贴合同正文后再审查。",
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description: "请改为上传合同原文 PDF / DOCX / TXT / PNG / JPG / JPEG，或直接粘贴合同正文后再审查。",
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};
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}
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if (message.includes("OCR 运行时缺失") || message.includes("OCR 未启用") || message.includes("OCR 能力未启用")) {
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return {
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type: "warning",
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title: "当前环境未启用 OCR",
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description: "扫描件暂时无法直接进入完整审查，请改传可复制文本 PDF / DOCX / TXT，或先补充合同正文文本后再提交。",
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description: "扫描件或图片暂时无法直接进入完整审查，请改传更清晰的图片、可复制文本 PDF / DOCX / TXT，或先补充合同正文文本后再提交。",
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};
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}
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if (message.includes("OCR 识别质量不足")) {
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return {
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type: "warning",
|
||||
title: "扫描件识别质量不足",
|
||||
description: "建议上传更清晰的扫描件、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。清晰扫描件已支持 OCR，但低质量扫描件仍会被门禁拦截。",
|
||||
description: "建议上传更清晰的扫描件或图片、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。清晰扫描件和图片已支持 OCR，但低质量输入仍会被门禁拦截。",
|
||||
};
|
||||
}
|
||||
if (message.includes("扫描件/图片型 PDF") || message.includes("OCR")) {
|
||||
return {
|
||||
type: "info",
|
||||
title: "检测到扫描件或图片型 PDF",
|
||||
description: "系统会先尝试 OCR；若识别质量不足，会建议你改传更清晰扫描件、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。",
|
||||
description: "系统会先尝试 OCR；若识别质量不足，会建议你改传更清晰扫描件或图片、可复制文本 PDF / DOCX / TXT，或直接粘贴合同正文。",
|
||||
};
|
||||
}
|
||||
if (message.includes("无法从上传文件中提取可审查文本")) {
|
||||
return {
|
||||
type: "warning",
|
||||
title: "当前文件未形成可审查正文",
|
||||
description: "请确认文件是可复制文本 PDF / DOCX / TXT；如果是扫描件，请提高扫描清晰度或直接粘贴合同正文。",
|
||||
description: "请确认文件是可复制文本 PDF / DOCX / TXT，或更清晰的图片合同；如果是扫描件或图片，请提高识别清晰度或直接粘贴合同正文。",
|
||||
};
|
||||
}
|
||||
return null;
|
||||
@@ -147,7 +147,7 @@ export default function ReviewPage() {
|
||||
setSubmissionGuidance(null);
|
||||
setSubmitting(false);
|
||||
submitLockRef.current = false;
|
||||
messageApi.error("仅支持 PDF / DOCX / TXT 文件");
|
||||
messageApi.error("仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件");
|
||||
return;
|
||||
}
|
||||
|
||||
@@ -195,7 +195,7 @@ export default function ReviewPage() {
|
||||
<div className="review-page-hero-copy">
|
||||
<span className="landing-badge">Start Review</span>
|
||||
<Title level={2}>上传客户已有合同，直接进入风险审查。</Title>
|
||||
<Text type="secondary">无论合同是不是系统生成的，都可以直接上传原文 PDF / DOCX / TXT 或粘贴正文，再设置审查视角后进入审查链路。</Text>
|
||||
<Text type="secondary">无论合同是不是系统生成的，都可以直接上传原文 PDF / DOCX / TXT / PNG / JPG / JPEG 或粘贴正文，再设置审查视角后进入审查链路。</Text>
|
||||
<div className="review-page-highlight-list">
|
||||
{reviewHighlights.map((item) => (
|
||||
<span className="review-page-highlight-chip" key={item}>
|
||||
@@ -245,10 +245,10 @@ export default function ReviewPage() {
|
||||
/>
|
||||
) : null}
|
||||
<Dragger
|
||||
accept=".pdf,.docx,.txt"
|
||||
accept=".pdf,.docx,.txt,.png,.jpg,.jpeg"
|
||||
beforeUpload={(file) => {
|
||||
if (!isSupportedReviewFile(file.name)) {
|
||||
messageApi.error("仅支持 PDF / DOCX / TXT 文件");
|
||||
messageApi.error("仅支持 PDF / DOCX / TXT / PNG / JPG / JPEG 文件");
|
||||
return Upload.LIST_IGNORE;
|
||||
}
|
||||
return false;
|
||||
@@ -264,8 +264,8 @@ export default function ReviewPage() {
|
||||
<p className="ant-upload-drag-icon">
|
||||
<InboxOutlined />
|
||||
</p>
|
||||
<p>点击或拖拽上传合同原文 PDF / DOCX / TXT</p>
|
||||
<p className="upload-hint">支持客户已有合同原文直接审查；扫描型 PDF 会优先尝试 OCR 抽取后再进入风险识别。</p>
|
||||
<p>点击或拖拽上传合同原文 PDF / DOCX / TXT / PNG / JPG / JPEG</p>
|
||||
<p className="upload-hint">支持客户已有合同原文直接审查；扫描型 PDF 和图片合同会优先尝试 OCR 抽取后再进入风险识别。</p>
|
||||
</Dragger>
|
||||
{selectedFileName ? (
|
||||
<div className="review-selected-file review-selected-file-rich">
|
||||
|
||||
Reference in New Issue
Block a user