feat: option to keep partial chunks (#390)

README.md

@@ -106,6 +106,7 @@ export class AppHomeComponent {
   - `maxDelay` Maximum retry interval. Default value: `50_000`
   - `onBusyDelay` Delay used between retries for non-error responses with missing range/offset. Default value: `1000`
   - `timeout` Time interval after which unfinished requests must be retried
+  - `keepPartial` Determines whether partial chunks should be kept
 
 - `token` Authorization token as a `string` or function returning a `string` or `Promise<string>`
 

src/uploadx/lib/retry-handler.ts

@@ -6,6 +6,7 @@ export enum ErrorType {
 }
 
 export type ShouldRetryFunction = (code: number, attempts: number) => boolean;
+export type KeepPartialFunction = (code: number) => boolean;
 
 export interface RetryConfig {
   /** Maximum number of retry attempts */
@@ -26,6 +27,8 @@ export interface RetryConfig {
   onBusyDelay?: number;
   /** Time interval after which hanged requests must be retried */
   timeout?: number;
+  /** Determines whether partial chunks should be kept */
+  keepPartial?: boolean | KeepPartialFunction;
 }
 
 const defaultRetryConfig: Required<RetryConfig> = {
@@ -39,7 +42,10 @@ const defaultRetryConfig: Required<RetryConfig> = {
   minDelay: 500,
   maxDelay: 50000,
   onBusyDelay: 1000,
-  timeout: 0
+  timeout: 0,
+  keepPartial(statusCode): boolean {
+    return statusCode >= 400;
+  }
 };
 
 /**

src/uploadx/lib/uploader.ts

@@ -161,7 +161,7 @@ export abstract class Uploader implements UploadState {
             this._token = '';
             break;
           default:
-            if (this.responseStatus >= 400 || this.chunkSize > DynamicChunk.size) {
+            if (unfunc(this.retry.config.keepPartial, this.responseStatus)) {
               this.offset = undefined;
             }
             this.status = 'retry';