ngx-uploadx
Version:
Angular Resumable Upload Module
290 lines • 36.6 kB
JavaScript
import { Canceler } from './canceler';
import { DynamicChunk } from './dynamic-chunk';
import { ErrorType, RetryHandler } from './retry-handler';
import { store } from './store';
import { isNumber, unfunc } from './utils';
const actionToStatusMap = {
pause: 'paused',
upload: 'queue',
cancel: 'cancelled',
update: 'updated'
};
/**
* Uploader Base Class
*/
export class Uploader {
file;
options;
stateChange;
ajax;
name;
size;
uploadId;
response = null;
responseStatus = 0;
responseHeaders = {};
progress = 0;
remaining;
speed = 0;
/** Custom headers */
headers = {};
/** Metadata Object */
metadata;
/** Upload endpoint */
endpoint = '/upload';
/** Chunk size in bytes */
chunkSize = 0;
/** Auth token/tokenGetter */
token;
/** Byte offset within the whole file */
offset;
/** Retries handler */
retry;
canceler = new Canceler();
abortController = new AbortController();
/** Set HttpRequest responseType */
responseType;
_authorize;
_prerequest;
_token;
_eventsCount = 0;
constructor(file, options, stateChange, ajax) {
this.file = file;
this.options = options;
this.stateChange = stateChange;
this.ajax = ajax;
this.retry = new RetryHandler(options.retryConfig);
this.name = file.name;
this.size = file.size;
this.metadata = {
name: file.name,
mimeType: file.type || 'application/octet-stream',
size: file.size,
lastModified: file.lastModified
};
options.maxChunkSize && (DynamicChunk.maxSize = options.maxChunkSize);
/** A function that is executed before the request is sent */
this._prerequest = options.prerequest || (req => req);
/** A function used to authorize the request */
this._authorize = options.authorize || (req => req);
this.configure(options);
}
_url = '';
get url() {
return this._url || store.get(this.uploadId) || '';
}
set url(value) {
this._url !== value && store.set(this.uploadId, value);
this._url = value;
}
_status;
get status() {
return this._status;
}
set status(s) {
if (s !== 'updated' && s !== 'cancelled') {
if (this._status === s)
return;
if (this._status === 'complete')
return;
}
if (this._status === 'cancelled')
return;
if (this._status === 'uploading' && s === 'queue')
return;
if (this._status === 'retry')
this.retry.cancel();
this._status = s;
if (s === 'paused')
this.abort();
if (s === 'cancelled' || s === 'complete' || s === 'error')
this.cleanup();
if (s === 'cancelled')
this.cancelAndSendState();
else if (s === 'updated')
this.updateAndSendState();
else
this.stateChange(this);
}
/**
* Configure uploader
*/
configure({ metadata, headers, token, endpoint, action }) {
endpoint && (this.endpoint = endpoint);
token && (this.token = token);
metadata && Object.assign(this.metadata, unfunc(metadata, this.file));
headers && Object.assign(this.headers, unfunc(headers, this.file));
action && (this.status = actionToStatusMap[action]);
}
/**
* Starts uploading
*/
async upload() {
do {
this.status = 'uploading';
try {
this._token ||= await this.updateToken();
this.url ||= await this.getFileUrl();
if (this.offset !== this.size) {
this.offset = isNumber(this.offset)
? await this.sendFileContent()
: await this.getOffset();
}
this.retry.observe(this.offset);
if (this.offset === this.size) {
this.remaining = 0;
this.progress = 100;
this.status = 'complete';
}
else if (!isNumber(this.offset)) {
this.stateChange(this);
await this.retry.wait(this.getRetryAfterFromBackend() || this.retry.config.onBusyDelay);
}
}
catch (e) {
e instanceof Error && console.error(e);
if (this.status !== 'uploading') {
return;
}
switch (this.retry.kind(this.responseStatus)) {
case ErrorType.Fatal:
this.status = 'error';
return;
case ErrorType.NotFound:
this.url = '';
break;
case ErrorType.Auth:
this._token = '';
break;
default:
if (unfunc(this.retry.config.keepPartial, this.responseStatus)) {
this.offset = undefined;
}
this.status = 'retry';
await this.retry.wait(this.getRetryAfterFromBackend());
}
}
} while (['uploading', 'retry', 'updated'].includes(this._status));
}
/**
* Performs http requests
*/
async request(requestOptions) {
this.responseStatus = 0;
this.response = null;
this.responseHeaders = {};
if (this.abortController.signal.aborted) {
this.abortController = new AbortController();
}
const signal = requestOptions.signal || this.abortController.signal;
let req = {
body: requestOptions.body || null,
canceler: this.canceler,
signal,
headers: { ...this.headers, ...requestOptions.headers },
method: requestOptions.method || 'GET',
url: requestOptions.url || this.url
};
if (!requestOptions.skipAuthorization) {
req = await this._authorize(req, this._token);
}
const { body = null, headers, method, url = req.url } = (await this._prerequest(req)) || req;
const ajaxRequestConfig = {
method,
headers: { ...req.headers, ...headers },
url,
data: body,
responseType: this.options.responseType ?? this.responseType,
withCredentials: !!this.options.withCredentials,
canceler: this.canceler,
signal,
validateStatus: () => true,
timeout: this.retry.config.timeout
};
if (isNumber(this.offset) && body && typeof body === 'object') {
ajaxRequestConfig.onUploadProgress = this.onProgress();
}
const response = await this.ajax.request(ajaxRequestConfig);
this.response = response.data;
this.responseHeaders = response.headers;
this.responseStatus = response.status;
if (response.status >= 400) {
return Promise.reject();
}
}
/**
* Set auth token string
*/
updateToken = () => {
return unfunc(this.token || '', this.responseStatus);
};
/**
* Updating the metadata of the upload
*/
update(_data) {
return Promise.reject('Not implemented');
}
abort() {
this.offset = undefined;
this.abortController.abort();
this.canceler.cancel();
}
async cancel() {
this.abort();
if (this.url) {
await this.request({ method: 'DELETE' }).catch(() => { });
}
}
/**
* Gets the value from the response
*/
getValueFromResponse(key) {
return this.responseHeaders[key.toLowerCase()] || null;
}
/**
* Get file chunk
* @param offset - number of bytes of the file to skip
* @param size - chunk size
*/
getChunk(offset, size) {
if (this.responseStatus === 413) {
DynamicChunk.maxSize = DynamicChunk.size = Math.floor(DynamicChunk.size / 2);
}
this.chunkSize =
this.options.chunkSize === 0 ? this.size : this.options.chunkSize || DynamicChunk.size;
const start = offset ?? this.offset ?? 0;
const end = Math.min(start + (size || this.chunkSize), this.size);
const body = this.file.slice(start, end);
return { start, end, body };
}
getRetryAfterFromBackend() {
return Number(this.getValueFromResponse('retry-after')) * 1000;
}
cancelAndSendState() {
this.cancel().then(() => this.stateChange(this), console.error);
}
updateAndSendState() {
this.update({ metadata: this.metadata }).then(() => this.stateChange(this), console.error);
}
cleanup = () => {
store.delete(this._url);
store.delete(this.uploadId);
};
onProgress() {
let throttle;
const startTime = Date.now();
return ({ loaded }) => {
const current = loaded / ((Date.now() - startTime) / 1000);
this.speed = ~~((this.speed * this._eventsCount + current) / ++this._eventsCount);
DynamicChunk.scale(this.speed);
if (!throttle) {
throttle = setTimeout(() => (throttle = undefined), 500);
const uploaded = (this.offset || 0) + loaded;
this.progress = +((uploaded / this.size) * 100).toFixed(2);
this.remaining = ~~((this.size - uploaded) / this.speed);
this.stateChange(this);
}
};
}
}
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{ Ajax, AjaxRequestConfig } from './ajax';\nimport { Canceler } from './canceler';\nimport { DynamicChunk } from './dynamic-chunk';\nimport {\n  AuthorizeRequest,\n  Metadata,\n  PreRequest,\n  RequestConfig,\n  RequestHeaders,\n  RequestOptions,\n  ResponseBody,\n  UploadAction,\n  UploaderOptions,\n  UploadState,\n  UploadStatus,\n  UploadxControlEvent\n} from './interfaces';\nimport { ErrorType, RetryHandler } from './retry-handler';\nimport { store } from './store';\nimport { isNumber, unfunc } from './utils';\n\nconst actionToStatusMap: { [K in UploadAction]: UploadStatus } = {\n  pause: 'paused',\n  upload: 'queue',\n  cancel: 'cancelled',\n  update: 'updated'\n};\n\n/**\n * Uploader Base Class\n */\nexport abstract class Uploader implements UploadState {\n  name: string;\n  readonly size: number;\n  readonly uploadId!: string;\n  response: ResponseBody = null;\n  responseStatus = 0;\n  responseHeaders: Record<string, string> = {};\n  progress = 0;\n  remaining!: number;\n  speed = 0;\n  /** Custom headers */\n  headers: RequestHeaders = {};\n  /** Metadata Object */\n  metadata: Metadata;\n  /** Upload endpoint */\n  endpoint = '/upload';\n  /** Chunk size in bytes */\n  chunkSize = 0;\n  /** Auth token/tokenGetter */\n  token: UploadxControlEvent['token'];\n  /** Byte offset within the whole file */\n  offset?: number;\n  /** Retries handler */\n  retry: RetryHandler;\n  canceler = new Canceler();\n  abortController = new AbortController();\n  /** Set HttpRequest responseType */\n  responseType?: 'json' | 'text' | 'document';\n  protected _authorize: AuthorizeRequest;\n  protected _prerequest: PreRequest;\n  protected _token!: string;\n  private _eventsCount = 0;\n\n  constructor(\n    readonly file: File,\n    readonly options: Readonly<UploaderOptions>,\n    readonly stateChange: (uploader: Uploader) => void,\n    readonly ajax: Ajax\n  ) {\n    this.retry = new RetryHandler(options.retryConfig);\n    this.name = file.name;\n    this.size = file.size;\n    this.metadata = {\n      name: file.name,\n      mimeType: file.type || 'application/octet-stream',\n      size: file.size,\n      lastModified: file.lastModified\n    };\n    options.maxChunkSize && (DynamicChunk.maxSize = options.maxChunkSize);\n    /** A function that is executed before the request is sent */\n    this._prerequest = options.prerequest || (req => req);\n    /** A function used to authorize the request */\n    this._authorize = options.authorize || (req => req);\n    this.configure(options);\n  }\n\n  private _url = '';\n\n  get url(): string {\n    return this._url || store.get(this.uploadId) || '';\n  }\n\n  set url(value: string) {\n    this._url !== value && store.set(this.uploadId, value);\n    this._url = value;\n  }\n\n  private _status!: UploadStatus;\n\n  get status(): UploadStatus {\n    return this._status;\n  }\n\n  set status(s: UploadStatus) {\n    if (s !== 'updated' && s !== 'cancelled') {\n      if (this._status === s) return;\n      if (this._status === 'complete') return;\n    }\n    if (this._status === 'cancelled') return;\n    if (this._status === 'uploading' && s === 'queue') return;\n    if (this._status === 'retry') this.retry.cancel();\n    this._status = s;\n    if (s === 'paused') this.abort();\n    if (s === 'cancelled' || s === 'complete' || s === 'error') this.cleanup();\n    if (s === 'cancelled') this.cancelAndSendState();\n    else if (s === 'updated') this.updateAndSendState();\n    else this.stateChange(this);\n  }\n\n  /**\n   * Configure uploader\n   */\n  configure({ metadata, headers, token, endpoint, action }: UploadxControlEvent): void {\n    endpoint && (this.endpoint = endpoint);\n    token && (this.token = token);\n    metadata && Object.assign(this.metadata, unfunc(metadata, this.file));\n    headers && Object.assign(this.headers, unfunc(headers, this.file));\n    action && (this.status = actionToStatusMap[action]);\n  }\n\n  /**\n   * Starts uploading\n   */\n  async upload(): Promise<void> {\n    do {\n      this.status = 'uploading';\n      try {\n        this._token ||= await this.updateToken();\n        this.url ||= await this.getFileUrl();\n        if (this.offset !== this.size) {\n          this.offset = isNumber(this.offset)\n            ? await this.sendFileContent()\n            : await this.getOffset();\n        }\n        this.retry.observe(this.offset);\n        if (this.offset === this.size) {\n          this.remaining = 0;\n          this.progress = 100;\n          this.status = 'complete';\n        } else if (!isNumber(this.offset)) {\n          this.stateChange(this);\n          await this.retry.wait(this.getRetryAfterFromBackend() || this.retry.config.onBusyDelay);\n        }\n      } catch (e) {\n        e instanceof Error && console.error(e);\n        if (this.status !== 'uploading') {\n          return;\n        }\n        switch (this.retry.kind(this.responseStatus)) {\n          case ErrorType.Fatal:\n            this.status = 'error';\n            return;\n          case ErrorType.NotFound:\n            this.url = '';\n            break;\n          case ErrorType.Auth:\n            this._token = '';\n            break;\n          default:\n            if (unfunc(this.retry.config.keepPartial, this.responseStatus)) {\n              this.offset = undefined;\n            }\n            this.status = 'retry';\n            await this.retry.wait(this.getRetryAfterFromBackend());\n        }\n      }\n    } while (['uploading', 'retry', 'updated'].includes(this._status));\n  }\n\n  /**\n   * Performs http requests\n   */\n  async request(requestOptions: RequestOptions): Promise<void> {\n    this.responseStatus = 0;\n    this.response = null;\n    this.responseHeaders = {};\n    if (this.abortController.signal.aborted) {\n      this.abortController = new AbortController();\n    }\n    const signal = requestOptions.signal || this.abortController.signal;\n    let req: RequestConfig = {\n      body: requestOptions.body || null,\n      canceler: this.canceler,\n      signal,\n      headers: { ...this.headers, ...requestOptions.headers },\n      method: requestOptions.method || 'GET',\n      url: requestOptions.url || this.url\n    };\n    if (!requestOptions.skipAuthorization) {\n      req = await this._authorize(req, this._token);\n    }\n    const { body = null, headers, method, url = req.url } = (await this._prerequest(req)) || req;\n    const ajaxRequestConfig: AjaxRequestConfig = {\n      method,\n      headers: { ...req.headers, ...headers },\n      url,\n      data: body,\n      responseType: this.options.responseType ?? this.responseType,\n      withCredentials: !!this.options.withCredentials,\n      canceler: this.canceler,\n      signal,\n      validateStatus: () => true,\n      timeout: this.retry.config.timeout\n    };\n    if (isNumber(this.offset) && body && typeof body === 'object') {\n      ajaxRequestConfig.onUploadProgress = this.onProgress();\n    }\n    const response = await this.ajax.request(ajaxRequestConfig);\n    this.response = response.data;\n    this.responseHeaders = response.headers;\n    this.responseStatus = response.status;\n    if (response.status >= 400) {\n      return Promise.reject();\n    }\n  }\n\n  /**\n   * Set auth token string\n   */\n  updateToken = (): string | Promise<string> => {\n    return unfunc(this.token || '', this.responseStatus);\n  };\n\n  /**\n   * Get file URI\n   */\n  protected abstract getFileUrl(): Promise<string>;\n\n  /**\n   * Send file content and return an offset for the next request\n   */\n  protected abstract sendFileContent(): Promise<number | undefined>;\n\n  /**\n   * Get an offset for the next request\n   */\n  protected abstract getOffset(): Promise<number | undefined>;\n\n  /**\n   *  Updating the metadata of the upload\n   */\n  protected update<T = { metadata?: Metadata }>(_data: T): Promise<string> {\n    return Promise.reject('Not implemented');\n  }\n\n  protected abort(): void {\n    this.offset = undefined;\n    this.abortController.abort();\n    this.canceler.cancel();\n  }\n\n  protected async cancel(): Promise<void> {\n    this.abort();\n    if (this.url) {\n      await this.request({ method: 'DELETE' }).catch(() => {});\n    }\n  }\n\n  /**\n   * Gets the value from the response\n   */\n  protected getValueFromResponse(key: string): string | null {\n    return this.responseHeaders[key.toLowerCase()] || null;\n  }\n\n  /**\n   * Get file chunk\n   * @param offset - number of bytes of the file to skip\n   * @param size - chunk size\n   */\n  getChunk(offset?: number, size?: number): { start: number; end: number; body: Blob } {\n    if (this.responseStatus === 413) {\n      DynamicChunk.maxSize = DynamicChunk.size = Math.floor(DynamicChunk.size / 2);\n    }\n    this.chunkSize =\n      this.options.chunkSize === 0 ? this.size : this.options.chunkSize || DynamicChunk.size;\n    const start = offset ?? this.offset ?? 0;\n    const end = Math.min(start + (size || this.chunkSize), this.size);\n    const body = this.file.slice(start, end);\n    return { start, end, body };\n  }\n\n  private getRetryAfterFromBackend(): number {\n    return Number(this.getValueFromResponse('retry-after')) * 1000;\n  }\n\n  private cancelAndSendState() {\n    this.cancel().then(() => this.stateChange(this), console.error);\n  }\n\n  private updateAndSendState(): void {\n    this.update({ metadata: this.metadata }).then(() => this.stateChange(this), console.error);\n  }\n\n  private cleanup = () => {\n    store.delete(this._url);\n    store.delete(this.uploadId);\n  };\n\n  private onProgress(): (evt: ProgressEvent) => void {\n    let throttle: ReturnType<typeof setTimeout> | undefined;\n    const startTime = Date.now();\n    return ({ loaded }) => {\n      const current = loaded / ((Date.now() - startTime) / 1000);\n      this.speed = ~~((this.speed * this._eventsCount + current) / ++this._eventsCount);\n      DynamicChunk.scale(this.speed);\n      if (!throttle) {\n        throttle = setTimeout(() => (throttle = undefined), 500);\n        const uploaded = (this.offset || 0) + loaded;\n        this.progress = +((uploaded / this.size) * 100).toFixed(2);\n        this.remaining = ~~((this.size - uploaded) / this.speed);\n        this.stateChange(this);\n      }\n    };\n  }\n}\n"]}