修复从 token 解析 bucket 的 bug & 完善下类型 & fix issue (#456)

* 修复从 token 解析 bucket 的 bug

* 完善observer类型

* 增加 base64 的导出

* 增加对 ak 的处理

* 添加注释

package.json

@@ -1,7 +1,7 @@
 {
   "name": "qiniu-js",
   "jsName": "qiniu",
-  "version": "3.0.2",
+  "version": "3.0.3",
   "private": false,
   "description": "Javascript SDK for Qiniu Resource (Cloud) Storage AP",
   "main": "lib/index.js",

src/index.ts

@@ -47,6 +47,8 @@ export {
   getHeadersForChunkUpload
 } from './utils'
 
+export { urlSafeBase64Encode, urlSafeBase64Decode } from './base64'
+
 export { CompressResult } from './compress'
 
 export { deleteUploadedChunks, getUploadUrl } from './api'

src/observable.ts

@@ -14,6 +14,20 @@ export interface NextObserver<T, E, C> {
   complete?: (res: C) => void
 }
 
+export interface ErrorObserver<T, E, C> {
+  next?: (value: T) => void
+  error: (err: E) => void
+  complete?: (res: C) => void
+}
+
+export interface CompletionObserver<T, E, C> {
+  next?: (value: T) => void
+  error?: (err: E) => void
+  complete: (res: C) => void
+}
+
+export type PartialObserver<T, E, C> = NextObserver<T, E, C> | ErrorObserver<T, E, C> | CompletionObserver<T, E, C>
+
 export interface IUnsubscribable {
   /** 取消 observer 的订阅 */
   unsubscribe(): void
@@ -27,10 +41,11 @@ export interface ISubscriptionLike extends IUnsubscribable {
 export type TeardownLogic = () => void
 
 export interface ISubscribable<T, E, C> {
-  subscribe(observer?: NextObserver<T, E, C>): IUnsubscribable
-  subscribe(next: null | undefined, error: null | undefined, complete: (res: C) => void): IUnsubscribable
-  subscribe(next: null | undefined, error: (error: E) => void, complete?: (res: C) => void): IUnsubscribable
-  subscribe(next: (value: T) => void, error: null | undefined, complete: (res: C) => void): IUnsubscribable
+  subscribe(
+    observer?: PartialObserver<T, E, C> | ((value: T) => void),
+    error?: (error: any) => void,
+    complete?: () => void
+  ): IUnsubscribable
 }
 
 /** 表示可清理的资源，比如 Observable 的执行 */
@@ -68,7 +83,7 @@ export class Subscriber<T, E, C> extends Subscription implements IObserver<T, E,
   protected destination: Partial<IObserver<T, E, C>>
 
   constructor(
-    observerOrNext?: NextObserver<T, E, C> | ((value: T) => void) | null,
+    observerOrNext?: PartialObserver<T, E, C> | ((value: T) => void) | null,
     error?: ((err: E) => void) | null,
     complete?: ((res: C) => void) | null
   ) {
@@ -120,12 +135,12 @@ export class Observable<T, E, C> implements ISubscribable<T, E, C> {
 
   constructor(private _subscribe: (subscriber: Subscriber<T, E, C>) => TeardownLogic) {}
 
-  subscribe(observer: NextObserver<T, E, C>): Subscription
+  subscribe(observer: PartialObserver<T, E, C>): Subscription
   subscribe(next: null | undefined, error: null | undefined, complete: (res: C) => void): Subscription
   subscribe(next: null | undefined, error: (error: E) => void, complete?: (res: C) => void): Subscription
   subscribe(next: (value: T) => void, error: null | undefined, complete: (res: C) => void): Subscription
   subscribe(
-    observerOrNext?: NextObserver<T, E, C> | ((value: T) => void) | null,
+    observerOrNext?: PartialObserver<T, E, C> | ((value: T) => void) | null,
     error?: ((err: E) => void) | null,
     complete?: ((res: C) => void) | null
   ): Subscription {

src/upload/base.ts

@@ -126,8 +126,11 @@ export default abstract class Base {
     this.onData = handlers.onData
     this.onError = handlers.onError
     this.onComplete = handlers.onComplete
-
-    this.bucket = utils.getPutPolicy(this.token).bucket
+    try {
+      this.bucket = utils.getPutPolicy(this.token).bucket
+    } catch (e) {
+      this.onError(e)
+    }
   }
 
   public async putFile(): Promise<utils.ResponseSuccess<UploadCompleteData>> {

src/utils.ts

@@ -272,8 +272,9 @@ interface PutPolicy {
 
 export function getPutPolicy(token: string) {
   const segments = token.split(':')
-  const ak = segments[0]
-  const putPolicy: PutPolicy = JSON.parse(urlSafeBase64Decode(segments[2]))
+  // token 构造的差异参考：https://github.com/qbox/product/blob/master/kodo/auths/UpToken.md#admin-uptoken-authorization
+  const ak = segments.length > 3 ? segments[1] : segments[0]
+  const putPolicy: PutPolicy = JSON.parse(urlSafeBase64Decode(segments[segments.length - 1]))
 
   return {
     ak,