From 3d9558508a3afedd38a455628b43f4ead304bdb1 Mon Sep 17 00:00:00 2001
From: "douboer@gmail.com" <gavin@gavin-mac-mini.local>
Date: Sat, 14 Feb 2026 11:16:40 +0800
Subject: [PATCH] update at 2026-02-14 11:16:40

---
 miniapp/pages/index/index.js | 19 ++++++++++++++++---
 miniapp/utils/sankey.js      | 35 +++++++++++++++++++++++++++++++++++
 tests/miniapp.spec.ts        | 16 ++++++++++++++++
 3 files changed, 67 insertions(+), 3 deletions(-)

diff --git a/miniapp/pages/index/index.js b/miniapp/pages/index/index.js
index 9823ca7..79df4f6 100644
--- a/miniapp/pages/index/index.js
+++ b/miniapp/pages/index/index.js
@@ -66,6 +66,15 @@ function getFileExtension(fileName) {
   return lowerName.slice(lastDotIndex + 1);
 }
 
+/**
+ * 从路径提取文件名，兼容 Unix/Windows 路径分隔符。
+ */
+function getBaseNameFromPath(filePath) {
+  const normalized = String(filePath || '').replace(/\\/g, '/');
+  const segments = normalized.split('/');
+  return segments[segments.length - 1] || '';
+}
+
 const FALLBACK_THEME_COLORS = ['#9b6bc2', '#7e95f7', '#4cc9f0', '#f4a261'];
 
 /**
@@ -859,7 +868,7 @@ Page({
    */
   readAndApplyFile(filePath, fileName, onReadFailPrefix) {
     const that = this;
-    const extension = getFileExtension(fileName);
+    const extension = getFileExtension(fileName) || getFileExtension(getBaseNameFromPath(filePath));
     const isCsvFile = extension === 'csv';
     const readOptions = {
       filePath,
@@ -960,8 +969,12 @@ Page({
         if (!picked) {
           return;
         }
-        const filePath = picked.path;
-        const fileName = picked.name || 'unknown.csv';
+        const filePath = picked.path || picked.tempFilePath || '';
+        const fileName =
+          picked.name ||
+          getBaseNameFromPath(filePath) ||
+          // 无法识别文件名时，默认按二进制读取，交由解析器做内容识别。
+          'upload.bin';
         that.readAndApplyFile(filePath, fileName, '读取文件失败');
       },
       fail(err) {
diff --git a/miniapp/utils/sankey.js b/miniapp/utils/sankey.js
index 8687812..608f3f5 100644
--- a/miniapp/utils/sankey.js
+++ b/miniapp/utils/sankey.js
@@ -270,6 +270,34 @@ function parseXlsxBuffer(buffer) {
   return toRawTable(rows);
 }
 
+/**
+ * 判断二进制是否为 Zip 容器（xlsx）魔数：50 4B。
+ */
+function isZipMagic(bufferLike) {
+  if (!bufferLike || typeof bufferLike.byteLength !== 'number' || bufferLike.byteLength < 2) {
+    return false;
+  }
+  const bytes = new Uint8Array(bufferLike, 0, 2);
+  return bytes[0] === 0x50 && bytes[1] === 0x4b;
+}
+
+/**
+ * 判断二进制是否为 OLE 容器（老 xls）魔数：D0 CF 11 E0 A1 B1 1A E1。
+ */
+function isOleMagic(bufferLike) {
+  if (!bufferLike || typeof bufferLike.byteLength !== 'number' || bufferLike.byteLength < 8) {
+    return false;
+  }
+  const bytes = new Uint8Array(bufferLike, 0, 8);
+  const signature = [0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1];
+  for (let i = 0; i < signature.length; i += 1) {
+    if (bytes[i] !== signature[i]) {
+      return false;
+    }
+  }
+  return true;
+}
+
 /**
  * 按文件名后缀自动分流解析器。
  */
@@ -281,6 +309,13 @@ function parseTableByFileName(fileName, payload) {
   if (lowerName.endsWith('.xlsx') || lowerName.endsWith('.xls')) {
     return parseXlsxBuffer(payload);
   }
+
+  // 兜底：后缀不可用时，通过文件魔数自动识别 Excel。
+  if (payload && typeof payload === 'object' && typeof payload.byteLength === 'number') {
+    if (isZipMagic(payload) || isOleMagic(payload)) {
+      return parseXlsxBuffer(payload);
+    }
+  }
   throw new Error('仅支持 .csv / .xlsx / .xls 文件');
 }
 
diff --git a/tests/miniapp.spec.ts b/tests/miniapp.spec.ts
index 6e1151a..e7f9a94 100644
--- a/tests/miniapp.spec.ts
+++ b/tests/miniapp.spec.ts
@@ -87,4 +87,20 @@ describe('miniapp utils sankey', () => {
     expect(table.headers).toEqual(['人數']);
     expect(table.rows).toEqual([['张三']]);
   });
+
+  it('文件名后缀缺失时，仍可根据二进制魔数识别 xlsx', () => {
+    const sheet = XLSX.utils.aoa_to_sheet([
+      ['source', 'target', 'value'],
+      ['A', 'B', 1]
+    ]);
+    const workbook = XLSX.utils.book_new();
+    XLSX.utils.book_append_sheet(workbook, sheet, 'S1');
+    const buffer = XLSX.write(workbook, { bookType: 'xlsx', type: 'buffer' });
+    const arrayBuffer = buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
+
+    const table = parseTableByFileName('upload.bin', arrayBuffer);
+
+    expect(table.headers).toEqual(['source', 'target', 'value']);
+    expect(table.rows).toEqual([['A', 'B', '1']]);
+  });
 });