1

components/cwg-file-picker-wrapper.vue

@@ -456,13 +456,12 @@ const handleFile = async (fileData) => {
     }
 
   } catch (e) {
-
+    const errMsg = e?.message || (typeof e === 'string' ? e : '文件处理失败')
+    console.error('handleFile failed:', e)
     uni.showToast({
-      title: '文件处理失败',
+      title: errMsg,
       icon: 'none'
     })
-
-    console.error(e)
   }
 }
 const startUpload = async () => {
@@ -645,71 +644,50 @@ const uploadBase64 = (fileItem) => {
 }
 
 
-const base64ToTempFile = (base64, fileName = 'file.png') => {
+/** 从 data URL 中取出 base64 正文，避免对大字符串做正则匹配 */
+const getBase64Body = (dataUrl) => {
+  if (!dataUrl || typeof dataUrl !== 'string') return ''
+  const marker = 'base64,'
+  const markerIdx = dataUrl.indexOf(marker)
+  if (markerIdx !== -1) {
+    return dataUrl.substring(markerIdx + marker.length)
+  }
+  const commaIdx = dataUrl.indexOf(',')
+  return commaIdx !== -1 ? dataUrl.substring(commaIdx + 1) : dataUrl
+}
 
+const base64ToTempFile = (base64, fileName = 'file.png') => {
   return new Promise((resolve, reject) => {
+    // #ifndef APP-PLUS
+    reject(new Error('仅 APP 环境支持'))
+    return
+    // #endif
 
-    const matches = base64.match(/^data:(.+);base64,(.+)$/)
-
-    if (!matches) {
-      reject('base64格式错误')
+    const base64Data = getBase64Body(base64)
+    if (!base64Data) {
+      reject(new Error('base64格式错误'))
       return
     }
 
-    const base64Data = matches[2]
-
-    const filePath =
-      `${plus.io.convertLocalFileSystemURL('_doc/')}${Date.now()}_${fileName}`
-
-    plus.io.resolveLocalFileSystemURL(
-      '_doc/',
-      (entry) => {
-
-        entry.getFile(
-          `${Date.now()}_${fileName}`,
-          { create: true },
-
-          (fileEntry) => {
-
-            fileEntry.createWriter((writer) => {
-
-              writer.onwrite = () => {
-                resolve(fileEntry.toLocalURL())
-              }
+    const safeName = `${Date.now()}_${(fileName || 'file').replace(/[/\\]/g, '_')}`
+    const dirName = 'cwg_upload'
 
-              writer.onerror = reject
-
-              const bitmap = new plus.nativeObj.Bitmap()
-
-              bitmap.loadBase64Data(
-                base64,
-
-                () => {
-
-                  bitmap.save(
-                    fileEntry.toLocalURL(),
-
-                    {},
-
-                    () => {
-                      resolve(fileEntry.toLocalURL())
-                    },
-
-                    reject
-                  )
-                },
-
-                reject
-              )
-            })
-          },
-
-          reject
-        )
-      },
-
-      reject
-    )
+    plus.io.resolveLocalFileSystemURL('_doc', (docEntry) => {
+      docEntry.getDirectory(dirName, { create: true, exclusive: false }, (dirEntry) => {
+        dirEntry.getFile(safeName, { create: true, exclusive: false }, (fileEntry) => {
+          fileEntry.createWriter((writer) => {
+            writer.onwrite = () => {
+              resolve(fileEntry.toLocalURL())
+            }
+            writer.onerror = (err) => {
+              reject(err || new Error('写入临时文件失败'))
+            }
+            writer.seek(0)
+            writer.writeAsBinary(base64Data)
+          }, reject)
+        }, reject)
+      }, reject)
+    }, reject)
   })
 }