修复刷新提单pdf文件名少一个字符

src/views/ecw/box/ladingBill/previewBill.vue

@@ -51,7 +51,8 @@ export default {
         
       }).then(res => {
         let form = new FormData()
-        let file = (new URL(res.data.imgUrl)).pathname.replace(/^(\/)[a-zA-Z0-9]/, '') // 替换掉最前面的/
+        let file = (new URL(res.data.imgUrl)).pathname
+        if(file.substring(0, 1) == '/')file = file.substring(1) // 替换掉最前面的/
         form.append('file', new File([doc.output('arraybuffer')], file, {type: 'application/pdf'}))
         form.append('path', file)