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feat(chat,pdf): scanned PDF OCR fallback and authenticated attachment display
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matevip
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@ -153,31 +153,197 @@ public class DocumentExtractTool {
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// ==================== PDF 提取链 ====================
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private ExtractedContent extractPdf(Path path, String options, List<String> attempts) throws Exception {
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String bestContent = null;
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String bestMethod = null;
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// 1. 尝试 pdftotext
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long t0 = System.currentTimeMillis();
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String content = tryPdftotext(path, options);
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if (content != null && !content.isBlank()) {
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attempts.add("pdftotext: 成功");
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return new ExtractedContent(content, "pdftotext", estimatePages(content));
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int pages = estimatePages(content);
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if (!needsOcr(content, pages)) {
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attempts.add("pdftotext: 成功 (" + (System.currentTimeMillis() - t0) + "ms)");
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return new ExtractedContent(content, "pdftotext", pages);
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}
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attempts.add("pdftotext: 文本过少 (每页 " + charsPerPage(content, pages) + " 字符)，可能是扫描版");
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bestContent = content;
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bestMethod = "pdftotext";
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} else {
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attempts.add("pdftotext: 失败或不可用");
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}
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attempts.add("pdftotext: 失败或不可用");
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// 2. 尝试 Python pdfplumber/pypdf
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long t1 = System.currentTimeMillis();
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content = tryPythonPdfExtractor(path, options);
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if (content != null && !content.isBlank()) {
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attempts.add("python_pdf: 成功");
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return new ExtractedContent(content, "python_pdfplumber", estimatePages(content));
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int pages = estimatePages(content);
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if (!needsOcr(content, pages)) {
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attempts.add("python_pdf: 成功 (" + (System.currentTimeMillis() - t1) + "ms)");
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return new ExtractedContent(content, "python_pdfplumber", pages);
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}
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attempts.add("python_pdf: 文本过少");
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if (bestContent == null || content.strip().length() > bestContent.strip().length()) {
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bestContent = content;
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bestMethod = "python_pdfplumber";
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}
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} else {
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attempts.add("python_pdf: 失败或不可用");
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}
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attempts.add("python_pdf: 失败或不可用");
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// 3. Java 实现（基于 Apache PDFBox 逻辑，纯 Java）
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// 3. Java 实现
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long t2 = System.currentTimeMillis();
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content = extractPdfWithJava(path);
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if (content != null && !content.isBlank()) {
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attempts.add("java_pdf: 成功");
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return new ExtractedContent(content, "java_pdfbox", estimatePages(content));
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int pages = estimatePages(content);
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if (!needsOcr(content, pages)) {
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attempts.add("java_pdf: 成功 (" + (System.currentTimeMillis() - t2) + "ms)");
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return new ExtractedContent(content, "java_pdfbox", pages);
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}
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attempts.add("java_pdf: 文本过少");
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if (bestContent == null || content.strip().length() > bestContent.strip().length()) {
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bestContent = content;
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bestMethod = "java_pdfbox";
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}
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} else {
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attempts.add("java_pdf: 失败");
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}
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attempts.add("java_pdf: 失败");
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throw new Exception("所有 PDF 提取方法都失败");
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// 4. OCR fallback（扫描版/照片型 PDF）
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log.info("[DocumentExtract] 文本提取不足，尝试 OCR: {}", path.getFileName());
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long t3 = System.currentTimeMillis();
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content = tryOcrExtract(path, attempts);
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if (content != null && !content.isBlank()) {
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attempts.add("ocr_tesseract: 成功 (" + (System.currentTimeMillis() - t3) + "ms)");
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return new ExtractedContent(content, "ocr_tesseract", estimatePages(content));
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}
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// attempts 已由 tryOcrExtract 内部记录失败原因
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// 返回之前级别的部分结果（如果有）
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if (bestContent != null) {
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log.warn("[DocumentExtract] OCR 不可用，返回部分文本结果: method={}, length={}",
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bestMethod, bestContent.strip().length());
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return new ExtractedContent(bestContent, bestMethod + "_partial", estimatePages(bestContent));
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}
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throw new Exception("所有 PDF 提取方法都失败（包括 OCR）");
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}
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/**
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* 判断提取到的文本是否太少、需要尝试 OCR。
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* 基于字符密度（每页平均字符数）而非总字符数，避免误判短票据/证书类 PDF。
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*/
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private boolean needsOcr(String text, int estimatedPages) {
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if (text == null || text.isBlank()) return true;
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String stripped = text.strip();
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if (stripped.length() < 20) return true;
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double perPage = charsPerPage(stripped, estimatedPages);
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// 正常文本 PDF 每页至少数百字符；每页不到 30 字符大概率是扫描版
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return perPage < 30;
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}
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private double charsPerPage(String text, int pages) {
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return (double) text.strip().length() / Math.max(1, pages);
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}
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/**
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* OCR 提取：pdftoppm 转图片 + tesseract 识别文字。
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* 仅依赖 Poppler（pdftoppm）和 tesseract 系统命令，不引入新 Python 依赖。
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*/
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private String tryOcrExtract(Path pdfPath, List<String> attempts) {
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Path tempDir = null;
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try {
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long startTime = System.currentTimeMillis();
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tempDir = Files.createTempDirectory("mc_ocr_");
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// Step 1: 检查 pdftoppm 可用性
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try {
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executeCommand(List.of("pdftoppm", "-v"));
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} catch (Exception e) {
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attempts.add("ocr: pdftoppm 不可用，无法将 PDF 转为图片");
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log.warn("[DocumentExtract] OCR: pdftoppm 不可用 - {}", e.getMessage());
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return null;
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}
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// Step 2: PDF → PNG（200dpi，足够 OCR 但不过大）
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long t1 = System.currentTimeMillis();
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String pagePrefix = tempDir.resolve("page").toString();
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executeCommand(List.of("pdftoppm", "-png", "-r", "200",
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pdfPath.toString(), pagePrefix));
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log.info("[DocumentExtract] OCR: pdftoppm 耗时 {}ms", System.currentTimeMillis() - t1);
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File[] pageFiles = tempDir.toFile().listFiles((dir, name) -> name.endsWith(".png"));
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if (pageFiles == null || pageFiles.length == 0) {
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attempts.add("ocr: pdftoppm 未生成图片");
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return null;
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}
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java.util.Arrays.sort(pageFiles);
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// Step 3: 检查 tesseract 可用性并探测语言包
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String langParam;
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try {
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String langOutput = executeCommand(List.of("tesseract", "--list-langs"));
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langParam = buildTesseractLangParam(langOutput);
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log.info("[DocumentExtract] OCR: tesseract 可用，语言参数: {}", langParam);
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} catch (Exception e) {
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attempts.add("ocr: tesseract 未安装");
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log.warn("[DocumentExtract] OCR: tesseract 不可用 - {}", e.getMessage());
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return null;
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}
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// Step 4: 对每页执行 OCR
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long t2 = System.currentTimeMillis();
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StringBuilder ocrText = new StringBuilder();
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for (int i = 0; i < pageFiles.length; i++) {
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ocrText.append("--- Page ").append(i + 1).append(" ---\n");
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try {
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List<String> cmd = new ArrayList<>();
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cmd.add("tesseract");
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cmd.add(pageFiles[i].getAbsolutePath());
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cmd.add("stdout");
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if (langParam != null) {
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cmd.add("-l");
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cmd.add(langParam);
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}
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String pageText = executeCommand(cmd);
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ocrText.append(pageText != null ? pageText.trim() : "").append("\n\n");
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} catch (Exception e) {
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log.warn("[DocumentExtract] OCR: 页面 {} tesseract 失败: {}", i + 1, e.getMessage());
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ocrText.append("[OCR 失败]\n\n");
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}
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}
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log.info("[DocumentExtract] OCR: tesseract 处理 {} 页耗时 {}ms，总耗时 {}ms",
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pageFiles.length, System.currentTimeMillis() - t2, System.currentTimeMillis() - startTime);
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String result = ocrText.toString().trim();
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return result.isEmpty() ? null : result;
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} catch (Exception e) {
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log.warn("[DocumentExtract] OCR 失败: {}", e.getMessage());
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attempts.add("ocr: 异常 - " + e.getMessage());
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return null;
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} finally {
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if (tempDir != null) {
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try {
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Files.walk(tempDir)
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.sorted(java.util.Comparator.reverseOrder())
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.forEach(f -> { try { Files.delete(f); } catch (IOException ignored) {} });
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} catch (IOException ignored) {}
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}
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}
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}
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/**
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* 从 tesseract --list-langs 输出中构建最优语言参数。
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* 优先 eng+chi_sim，缺中文则只用 eng，都缺则返回 null（用 tesseract 默认）。
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*/
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private String buildTesseractLangParam(String listLangsOutput) {
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if (listLangsOutput == null) return null;
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boolean hasEng = listLangsOutput.contains("eng");
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boolean hasChiSim = listLangsOutput.contains("chi_sim");
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if (hasEng && hasChiSim) return "eng+chi_sim";
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if (hasEng) return "eng";
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if (hasChiSim) return "chi_sim";
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return null; // 用 tesseract 默认语言
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}
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private String tryPdftotext(Path path, String options) {
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@ -551,7 +717,7 @@ public class DocumentExtractTool {
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}
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}
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private String tryPythonScript(String script, String filePath) {
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private String tryPythonScript(String script, String... args) {
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Path tempScript = null;
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try {
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tempScript = Files.createTempFile("extract", ".py");
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@ -559,7 +725,10 @@ public class DocumentExtractTool {
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// Windows 通常只有 python，没有 python3
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String pythonCmd = IS_WINDOWS ? "python" : "python3";
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List<String> command = List.of(pythonCmd, tempScript.toString(), filePath);
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List<String> command = new ArrayList<>();
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command.add(pythonCmd);
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command.add(tempScript.toString());
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for (String arg : args) command.add(arg);
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return executeCommand(command);
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} catch (Exception e) {
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log.debug("Python 脚本失败: {}", e.getMessage());
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@ -42,6 +42,22 @@ http.interceptors.response.use(
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}
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)
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// ==================== 受保护文件访问 ====================
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/**
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* 使用 JWT 认证 fetch 受保护文件，返回 Blob。
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* 用于 <img> 和 <a download> 无法自动携带 Authorization header 的场景。
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* 使用原生 fetch（不走 axios），避免 baseURL 拼接和 R<T> 拦截器干扰。
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*/
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export async function fetchAuthenticatedBlob(fileUrl: string): Promise<Blob> {
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const token = localStorage.getItem('token')
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const headers: Record<string, string> = {}
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if (token) headers.Authorization = `Bearer ${token}`
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const response = await fetch(fileUrl, { headers })
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if (!response.ok) throw new Error(`Fetch failed: ${response.status}`)
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return response.blob()
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}
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// ==================== Auth ====================
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export const authApi = {
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login: (data: { username: string; password: string }) =>
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@ -214,21 +214,19 @@
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class="message-attachment-image"
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>
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<img
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:src="attachment.url"
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:src="getDisplayUrl(attachment)"
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:alt="attachment.name"
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loading="lazy"
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@click="openAttachment(attachment.url)"
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@click="openImage(getDisplayUrl(attachment))"
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/>
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<span class="message-attachment-image__name">{{ attachment.name }}</span>
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</div>
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<a
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<button
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v-for="attachment in fileAttachments"
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:key="attachment.storedName"
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class="message-attachment"
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:href="attachment.url"
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target="_blank"
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rel="noreferrer"
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:download="attachment.name"
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type="button"
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@click="downloadFile(attachment)"
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>
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<svg class="message-attachment__icon" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
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<path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/>
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@ -236,7 +234,7 @@
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</svg>
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<span class="message-attachment__name">{{ attachment.name }}</span>
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<span class="message-attachment__meta">{{ formatFileSize(attachment.size) }}</span>
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</a>
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</button>
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</div>
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</div>
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@ -288,12 +286,14 @@
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import { computed, ref, watch, onBeforeUnmount } from 'vue'
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import { useI18n } from 'vue-i18n'
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import { useMarkdownRenderer } from '@/composables/useMarkdownRenderer'
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import { useAuthenticatedAttachment } from '@/composables/useAuthenticatedAttachment'
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import TypingCursor from './TypingCursor.vue'
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import type { Message, ChatAttachment, ToolCallMeta, PlanMeta } from '@/types'
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import type { ChatErrorInfo } from '@/types/chatError'
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const { renderMarkdown } = useMarkdownRenderer()
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const { t } = useI18n()
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const { blobUrls, loadAllImages, downloadFile, openImage, getDisplayUrl, revokeAll } = useAuthenticatedAttachment()
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interface Props {
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message: Message
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@ -456,6 +456,7 @@ function copyMessage() {
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onBeforeUnmount(() => {
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if (copyTimer) clearTimeout(copyTimer)
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revokeAll()
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})
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// --- 附件 ---
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@ -463,6 +464,11 @@ const attachments = computed(() => props.message.attachments || [])
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const imageAttachments = computed(() => attachments.value.filter(a => a.contentType?.startsWith('image/')))
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const fileAttachments = computed(() => attachments.value.filter(a => !a.contentType?.startsWith('image/')))
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// 增量加载图片附件的鉴权 blob URL（watch 覆盖首次 + 后续变化）
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watch(imageAttachments, (atts) => {
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if (atts.length > 0) loadAllImages(atts)
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}, { immediate: true })
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// --- 时间 ---
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const formattedTime = computed(() => {
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if (!props.message.createTime) return ''
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@ -478,9 +484,7 @@ const formatFileSize = (size: number) => {
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return `${(size / (1024 * 1024)).toFixed(1)} MB`
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}
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const openAttachment = (url: string) => {
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window.open(url, '_blank')
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}
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// openAttachment 已由 useAuthenticatedAttachment 的 openImage / downloadFile 替代
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// --- 执行过程面板 ---
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const executionExpanded = ref(false)
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@ -1331,6 +1335,10 @@ watch(isGenerating, (generating) => {
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background: rgba(255, 255, 255, 0.14);
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color: inherit;
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text-decoration: none;
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border: none;
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font: inherit;
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cursor: pointer;
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width: 100%;
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}
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.user-bubble .message-attachment {
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134
mateclaw-ui/src/composables/useAuthenticatedAttachment.ts
Normal file
134
mateclaw-ui/src/composables/useAuthenticatedAttachment.ts
Normal file
@ -0,0 +1,134 @@
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import { ref } from 'vue'
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import { fetchAuthenticatedBlob } from '@/api/index'
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import type { ChatAttachment } from '@/types'
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/**
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* 统一受保护附件 Loader
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*
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* 项目使用 Bearer token 认证（localStorage），<img src> 和 <a href> 不会自动携带
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* Authorization header。此 composable 统一处理鉴权 fetch → blob → ObjectURL。
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*
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* 使用方式：
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* - 图片：loadAllImages() 批量加载 → blobUrls[key] 绑定 <img :src>
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* - 文件：downloadFile() 点击时鉴权下载
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* - 图片点击放大：openImage() 同步开窗避免弹窗拦截
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* - 组件卸载：revokeAll() 释放所有 blob URL
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*/
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export function useAuthenticatedAttachment() {
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/** 已加载的 blob URL 映射（key = storedName || url） */
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const blobUrls = ref<Record<string, string>>({})
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/** 跟踪所有创建的 blob URL，用于清理 */
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const trackedUrls: string[] = []
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/** 正在加载的 URL 集合，防止重复请求 */
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const loading = new Set<string>()
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/**
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* 加载单个附件的 blob URL
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*/
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async function loadBlobUrl(url: string, key: string): Promise<string | null> {
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// 跳过：已加载、正在加载、本地 blob
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if (blobUrls.value[key] || loading.has(key) || url.startsWith('blob:')) return blobUrls.value[key] || url
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loading.add(key)
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try {
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const blob = await fetchAuthenticatedBlob(url)
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const objectUrl = URL.createObjectURL(blob)
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blobUrls.value[key] = objectUrl
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trackedUrls.push(objectUrl)
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return objectUrl
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} catch (e) {
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console.warn('[useAuthenticatedAttachment] Failed to load:', url, e)
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return null
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} finally {
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loading.delete(key)
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}
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}
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/**
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* 批量加载所有图片附件的 blob URL
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||||
*/
|
||||
async function loadAllImages(attachments: ChatAttachment[]) {
|
||||
const imageAtts = attachments.filter(a => a.contentType?.startsWith('image/'))
|
||||
for (const att of imageAtts) {
|
||||
const key = att.storedName || att.url
|
||||
if (!att.previewUrl && att.url && !blobUrls.value[key]) {
|
||||
await loadBlobUrl(att.url, key)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 鉴权下载文件：fetch blob → 创建临时 <a download> → 触发点击
|
||||
*/
|
||||
async function downloadFile(attachment: ChatAttachment) {
|
||||
try {
|
||||
const blob = await fetchAuthenticatedBlob(attachment.url)
|
||||
const url = URL.createObjectURL(blob)
|
||||
const a = document.createElement('a')
|
||||
a.href = url
|
||||
a.download = attachment.name || 'download'
|
||||
document.body.appendChild(a)
|
||||
a.click()
|
||||
document.body.removeChild(a)
|
||||
// 延迟释放，确保下载已启动
|
||||
setTimeout(() => URL.revokeObjectURL(url), 10000)
|
||||
} catch (e) {
|
||||
console.error('[useAuthenticatedAttachment] Download failed:', attachment.name, e)
|
||||
// fallback：直接打开 URL（可能 401 但至少给个反馈）
|
||||
window.open(attachment.url, '_blank')
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 鉴权打开图片到新标签页。
|
||||
* 同步 window.open 空白页（绕过弹窗拦截），异步写入 blob URL。
|
||||
*/
|
||||
async function openImage(url: string) {
|
||||
if (url.startsWith('blob:')) {
|
||||
window.open(url, '_blank')
|
||||
return
|
||||
}
|
||||
// 同步开窗：必须在用户点击的同步调用栈中，否则被浏览器拦截
|
||||
const win = window.open('about:blank', '_blank')
|
||||
if (!win) return
|
||||
try {
|
||||
const blob = await fetchAuthenticatedBlob(url)
|
||||
const blobUrl = URL.createObjectURL(blob)
|
||||
win.location.href = blobUrl
|
||||
// 页面关闭后释放
|
||||
setTimeout(() => URL.revokeObjectURL(blobUrl), 300000)
|
||||
} catch {
|
||||
win.location.href = url // fallback
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 获取附件的显示 URL（优先 blob → previewUrl → 原始 url）
|
||||
*/
|
||||
function getDisplayUrl(attachment: ChatAttachment): string {
|
||||
const key = attachment.storedName || attachment.url
|
||||
return blobUrls.value[key] || attachment.previewUrl || attachment.url || ''
|
||||
}
|
||||
|
||||
/**
|
||||
* 释放所有跟踪的 blob URL
|
||||
*/
|
||||
function revokeAll() {
|
||||
for (const url of trackedUrls) {
|
||||
URL.revokeObjectURL(url)
|
||||
}
|
||||
trackedUrls.length = 0
|
||||
blobUrls.value = {}
|
||||
}
|
||||
|
||||
return {
|
||||
blobUrls,
|
||||
loadBlobUrl,
|
||||
loadAllImages,
|
||||
downloadFile,
|
||||
openImage,
|
||||
getDisplayUrl,
|
||||
revokeAll,
|
||||
}
|
||||
}
|
||||
@ -1029,6 +1029,19 @@ function normalizeMessage(raw: Message): Message {
|
||||
// interrupted 是合法的历史状态（interrupt-with-followup），不映射为 stopped
|
||||
if (!msg.status) msg.status = 'completed'
|
||||
|
||||
// 从 file-type contentParts 恢复 attachments（历史消息 API 不返回单独的 attachments 字段）
|
||||
const fileParts = msg.contentParts.filter(p => p.type === 'file' && p.fileUrl)
|
||||
if (fileParts.length > 0 && (!msg.attachments || msg.attachments.length === 0)) {
|
||||
msg.attachments = fileParts.map(p => ({
|
||||
name: p.fileName || 'unknown',
|
||||
size: typeof p.fileSize === 'number' ? p.fileSize : Number(p.fileSize) || 0,
|
||||
url: p.fileUrl!,
|
||||
storedName: p.storedName || '',
|
||||
path: p.path || '',
|
||||
contentType: p.contentType,
|
||||
}))
|
||||
}
|
||||
|
||||
// 从持久化的 [错误] 文本重建 errorInfo，使刷新后也能显示错误卡片
|
||||
if (msg.role === 'assistant' && !msg.errorInfo) {
|
||||
const text = msg.content || msg.contentParts?.find(p => p.type === 'text')?.text || ''
|
||||
|
||||
Loading…
Reference in New Issue
Block a user