feat: 新增上传文件接口

src/utils/file.ts

@@ -1,3 +1,49 @@
+import { Buffer } from "buffer"
+
+/**
+ * * file转url
+ */
+ export const fileToUrl = (file: File): string => {
+  const Url = URL || window.URL || window.webkitURL
+  const ImageUrl = Url.createObjectURL(file)
+  return ImageUrl
+}
+
+/**
+ * * url转file
+ */
+ export const urlToFile = (fileUrl: string, fileName = new Date().getTime()): File => {
+  const dataArr = fileUrl.split(',')
+  const mime = (dataArr as any[])[0].match(/:(.*);/)[1]
+  const originStr = atob(dataArr[1])
+  return new File([originStr], `${fileName}`, { type: mime })
+}
+
+/**
+ * * file转base64
+ * @param file 文件数据
+ * @param callback 回调函数 
+ */
+export const fileTobase64 = (file: File, callback: Function) => {
+  let reader = new FileReader()
+  reader.readAsDataURL(file)
+  reader.onload = function (e: ProgressEvent<FileReader>) {
+    if (e.target) {
+      let base64 = e.target.result
+      callback(base64)
+    }
+  }
+}
+
+/**
+ * * canvas转file
+ * @param canvas 
+ */
+export const canvastoFile = (canvas: HTMLCanvasElement) => {
+  const dataurl = canvas.toDataURL('image/png')
+  return urlToFile(dataurl)
+}
+
 /**
  * *获取上传的文件数据
  * @param { File } file 文件对象
@@ -38,7 +84,7 @@ export const downloadByA = (url: string, filename = new Date().getTime(), fileSu
 }
 
 /**
- * 下载数据
+ * * 下载数据
  * @param { string } content 数据内容
  * @param { ?string } filename 文件名称（默认随机字符）
  * @param { ?string } fileSuffix 文件名称（默认随机字符）
@@ -51,4 +97,4 @@ export const downloadTextFile = (
   // 字符内容转变成blob地址
   const blob = new Blob([content])
   downloadByA(URL.createObjectURL(blob), filename, fileSuffix)
-}
+}

src/utils/utils.ts

@@ -111,29 +111,6 @@ export const isMac = () => {
   return /macintosh|mac os x/i.test(navigator.userAgent)
 }
 
-/**
- * * file转url
- */
-export const fileToUrl = (file: File): string => {
-  const Url = URL || window.URL || window.webkitURL
-  const ImageUrl = Url.createObjectURL(file)
-  return ImageUrl
-}
-
-/**
- * * file转base64
- */
-export const fileTobase64 = (file: File, callback: Function) => {
-  let reader = new FileReader()
-  reader.readAsDataURL(file)
-  reader.onload = function (e: ProgressEvent<FileReader>) {
-    if (e.target) {
-      let base64 = e.target.result
-      callback(base64)
-    }
-  }
-}
-
 /**
  * * 挂载监听
  */