feat: 配置生成multer文件上传器

src/loaders/middleware/multer/index.ts

@@ -0,0 +1,53 @@
+import express from 'express'
+import { multerUploader } from './uploader'
+
+/**
+ * 上传单个文件
+ * req.file is the <filedName> file
+ * req.body will hold the text fields, if there were any
+ *
+ * @param filedName 上传文件的字段名
+ */
+const uploadSingleFile = (filedName: string): express.RequestHandler => {
+  return multerUploader.single(filedName)
+}
+
+/**
+ * 上传多个文件
+ * req.files is array of <filedName> files
+ * req.body will contain the text fields, if there were any
+ *
+ * @param filedName 上传文件的字段名
+ * @param maxCount 最大上传数量
+ */
+const uploadMultiFiles = (filedName: string, maxCount?: number): express.RequestHandler => {
+  return multerUploader.array(filedName, maxCount)
+}
+
+/**
+ * 类型定义：自定义上传多个文件的参数（单个）
+ */
+interface uploadCustomFilesParam {
+  /** 上传文件的字段名 */
+  name: string
+  /** 某字段名的文件的最大上传数量 */
+  maxCount: number
+}
+
+/**
+ * 自定义上传多个文件
+ * req.files is an object (String -> Array) where fieldname is the key, and the value is array of files
+ *
+ * e.g.
+ *  req.files['avatar'][0] -> File
+ *  req.files['gallery'] -> Array
+ *
+ * req.body will contain the text fields, if there were any
+ *
+ * @param params 自定义上传多个文件的参数
+ */
+const uploadCustomFiles = (params: uploadCustomFilesParam[]): express.RequestHandler => {
+  return multerUploader.fields(params)
+}
+
+export { uploadSingleFile, uploadMultiFiles, uploadCustomFiles }

src/loaders/middleware/multer/uploader.ts

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+// 配置multer，生成文件上传器
+// 使用到的中间件 - multer：https://github.com/expressjs/multer
+
+import path from 'path'
+import multer from 'multer'
+import config from '@/_config/config'
+
+/** 使用multer上传文件的路径 */
+const DESTPATH = path.join(config.uploadDir, 'temp')
+
+/**
+ * multer配置
+ * - 目标路径
+ */
+const multerOpts: multer.Options = {
+  dest: DESTPATH
+}
+
+const multerUploader = multer(multerOpts)
+
+export { multerUploader }