feat: busboy support async generator mode (#4074)

* feat: support async generator mode

* fix: limit case

* fix: limit case

* fix: limit case

* chore: test case

* fix: EPIPE error

* fix: test

* fix: test

* chore: hidden init

* docs: update

* fix: file stream delay

* fix: file stream delay

.gitignore

@@ -25,3 +25,4 @@ site/changelog
 .changelog
 **/test/*.txt
 .audit
+packages/**/test/tmp

packages/busboy/src/error.ts

@@ -2,16 +2,16 @@ import { httpError } from '@midwayjs/core';
 
 export class MultipartInvalidFilenameError extends httpError.BadRequestError {
   constructor(filename: string) {
-    super(`Invalid upload file name "${filename}", please check it`);
+    super(`Invalid file name or suffix "${filename}".`);
   }
 }
 
 export class MultipartInvalidFileTypeError extends httpError.BadRequestError {
   constructor(filename: string, currentType: string, type: string) {
     super(
-      `Invalid upload file type, "${filename}" type(${
+      `Invalid file type, "${filename}" type(${
         currentType || 'unknown'
-      }) is not ${type} , please check it`
+      }) is not ${type}.`
     );
   }
 }

packages/busboy/src/interface.ts

@@ -2,7 +2,7 @@ import { Readable } from 'stream';
 import { IgnoreMatcher, IMidwayContext } from '@midwayjs/core';
 import { BusboyConfig } from 'busboy';
 
-export type UploadMode = 'stream' | 'file';
+export type UploadMode = 'stream' | 'file' | 'asyncIterator';
 
 export interface UploadOptions extends BusboyConfig {
   /**
@@ -52,6 +52,10 @@ export interface UploadFileInfo {
    * file data, a string of path
    */
   data: string;
+  /**
+   * field name
+   */
+  fieldName: string;
 }
 
 export interface UploadStreamFileInfo {
@@ -66,7 +70,21 @@ export interface UploadStreamFileInfo {
   /**
    * file data, Readable stream
    */
-  data: Readable ;
+  data: Readable;
+  /**
+   * field name
+   */
+  fieldName: string;
 }
 
+export interface UploadStreamFieldInfo {
+  /**
+   * field name
+   */
+  name: string;
+  /**
+   * field value
+   */
+  value: any;
+}