ngx-uploader
Version:
Angular 2+ File Uploader
304 lines • 44.1 kB
JavaScript
import { EventEmitter } from '@angular/core';
import { Observable, Subject, finalize, mergeMap } from 'rxjs';
import { UploadStatus } from './interfaces';
export function humanizeBytes(bytes) {
if (bytes === 0) {
return '0 Byte';
}
const k = 1024;
const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}
export class NgUploaderService {
constructor(concurrency = Number.POSITIVE_INFINITY, contentTypes = ['*'], maxUploads = Number.POSITIVE_INFINITY, maxFileSize = Number.POSITIVE_INFINITY) {
this.queue = [];
this.serviceEvents = new EventEmitter();
this.uploadScheduler = new Subject();
this.subs = [];
this.contentTypes = contentTypes;
this.maxUploads = maxUploads;
this.maxFileSize = maxFileSize;
this.uploadScheduler
.pipe(mergeMap(upload => this.startUpload(upload), concurrency))
.subscribe(uploadOutput => this.serviceEvents.emit(uploadOutput));
}
handleFiles(incomingFiles) {
const allowedIncomingFiles = [].reduce.call(incomingFiles, (acc, checkFile, i) => {
const futureQueueLength = acc.length + this.queue.length + 1;
if (this.isContentTypeAllowed(checkFile.type) &&
futureQueueLength <= this.maxUploads &&
this.isFileSizeAllowed(checkFile.size)) {
acc = acc.concat(checkFile);
}
else {
const rejectedFile = this.makeUploadFile(checkFile, i);
this.serviceEvents.emit({ type: 'rejected', file: rejectedFile });
}
return acc;
}, []);
this.queue.push(...allowedIncomingFiles.map((file, i) => {
const uploadFile = this.makeUploadFile(file, i);
this.serviceEvents.emit({ type: 'addedToQueue', file: uploadFile });
return uploadFile;
}));
this.serviceEvents.emit({ type: 'allAddedToQueue' });
}
initInputEvents(input) {
return input.subscribe((event) => {
switch (event.type) {
case 'uploadFile':
const uploadFileIndex = this.queue.findIndex(file => file === event.file);
if (uploadFileIndex !== -1 && event.file) {
this.uploadScheduler.next({ file: this.queue[uploadFileIndex], event: event });
}
break;
case 'uploadAll':
const files = this.queue.filter(file => file.progress.status === UploadStatus.Queue);
files.forEach(file => this.uploadScheduler.next({ file: file, event: event }));
break;
case 'cancel':
const id = event.id || null;
if (!id) {
return;
}
const subs = this.subs.filter(sub => sub.id === id);
subs.forEach(sub => {
if (sub.sub) {
sub.sub.unsubscribe();
const fileIndex = this.queue.findIndex(file => file.id === id);
if (fileIndex !== -1) {
this.queue[fileIndex].progress.status = UploadStatus.Cancelled;
this.serviceEvents.emit({ type: 'cancelled', file: this.queue[fileIndex] });
}
}
});
break;
case 'cancelAll':
this.subs.forEach(sub => {
if (sub.sub) {
sub.sub.unsubscribe();
}
const file = this.queue.find(uploadFile => uploadFile.id === sub.id);
if (file) {
file.progress.status = UploadStatus.Cancelled;
this.serviceEvents.emit({ type: 'cancelled', file: file });
}
});
break;
case 'remove':
if (!event.id) {
return;
}
const i = this.queue.findIndex(file => file.id === event.id);
if (i !== -1) {
const file = this.queue[i];
this.queue.splice(i, 1);
this.serviceEvents.emit({ type: 'removed', file: file });
}
break;
case 'removeAll':
if (this.queue.length) {
this.queue = [];
this.serviceEvents.emit({ type: 'removedAll' });
}
break;
}
});
}
startUpload(upload) {
return new Observable(observer => {
const sub = this.uploadFile(upload.file, upload.event)
.pipe(finalize(() => {
if (!observer.closed) {
observer.complete();
}
}))
.subscribe({
next: (output) => {
observer.next(output);
},
error: (err) => {
observer.error(err);
observer.complete();
},
complete: () => {
observer.complete();
}
});
this.subs.push({ id: upload.file.id, sub: sub });
});
}
uploadFile(file, event) {
return new Observable(observer => {
const url = event.url || '';
const method = event.method || 'POST';
const data = event.data || {};
const headers = event.headers || {};
const xhr = new XMLHttpRequest();
const time = new Date().getTime();
let progressStartTime = (file.progress.data && file.progress.data.startTime) || time;
let speed = 0;
let eta = null;
xhr.open(method, url, true);
xhr.withCredentials = event.withCredentials ? true : false;
xhr.upload.onprogress = (e) => {
if (e.lengthComputable) {
const percentage = Math.round((e.loaded * 100) / e.total);
const diff = new Date().getTime() - time;
speed = Math.round((e.loaded / diff) * 1000);
progressStartTime = (file.progress.data && file.progress.data.startTime) || new Date().getTime();
eta = Math.ceil((e.total - e.loaded) / speed);
file.progress = {
status: UploadStatus.Uploading,
data: {
percentage: percentage,
speed: speed,
speedHuman: `${humanizeBytes(speed)}/s`,
startTime: progressStartTime,
endTime: null,
eta: eta,
etaHuman: this.secondsToHuman(eta)
}
};
observer.next({ type: 'uploading', file: file });
}
};
xhr.upload.ontimeout = (e) => {
observer.error(e);
observer.complete();
};
xhr.upload.onerror = (e) => {
observer.error(e);
observer.complete();
};
xhr.upload.onabort = () => {
observer.complete();
};
xhr.onreadystatechange = () => {
if (xhr.readyState === XMLHttpRequest.DONE) {
const speedAverage = Math.round((file.size / (new Date().getTime() - progressStartTime)) * 1000);
file.progress = {
status: UploadStatus.Done,
data: {
percentage: 100,
speed: speedAverage,
speedHuman: `${humanizeBytes(speedAverage)}/s`,
startTime: progressStartTime,
endTime: new Date().getTime(),
eta: eta,
etaHuman: this.secondsToHuman(eta || 0)
}
};
file.responseStatus = xhr.status;
try {
file.response = JSON.parse(xhr.response);
}
catch (e) {
file.response = xhr.response;
}
file.responseHeaders = this.parseResponseHeaders(xhr.getAllResponseHeaders());
observer.next({ type: 'done', file: file });
observer.complete();
}
};
try {
const uploadFile = file.nativeFile;
const uploadIndex = this.queue.findIndex(outFile => outFile.nativeFile === uploadFile);
if (this.queue[uploadIndex].progress.status === UploadStatus.Cancelled) {
observer.complete();
}
Object.keys(headers).forEach(key => xhr.setRequestHeader(key, headers[key]));
let bodyToSend;
if (event.includeWebKitFormBoundary !== false) {
Object.keys(data).forEach(key => file.form.append(key, data[key]));
file.form.append(event.fieldName || 'file', uploadFile, uploadFile.name);
bodyToSend = file.form;
}
else {
bodyToSend = uploadFile;
}
this.serviceEvents.emit({ type: 'start', file: file });
xhr.send(bodyToSend);
}
catch (e) {
observer.complete();
}
return () => {
xhr.abort();
};
});
}
secondsToHuman(sec) {
return new Date(sec * 1000).toISOString().substr(11, 8);
}
generateId() {
return Math.random().toString(36).substring(7);
}
setContentTypes(contentTypes) {
if (typeof contentTypes !== 'undefined' && contentTypes instanceof Array) {
if (contentTypes.find((type) => type === '*') !== undefined) {
this.contentTypes = ['*'];
}
else {
this.contentTypes = contentTypes;
}
return;
}
this.contentTypes = ['*'];
}
allContentTypesAllowed() {
return this.contentTypes.find((type) => type === '*') !== undefined;
}
isContentTypeAllowed(mimetype) {
if (this.allContentTypesAllowed()) {
return true;
}
return this.contentTypes.find((type) => type === mimetype) !== undefined;
}
isFileSizeAllowed(fileSize) {
if (!this.maxFileSize) {
return true;
}
return fileSize <= this.maxFileSize;
}
makeUploadFile(file, index) {
return {
fileIndex: index,
id: this.generateId(),
name: file.name,
size: file.size,
type: file.type,
form: new FormData(),
progress: {
status: UploadStatus.Queue,
data: {
percentage: 0,
speed: 0,
speedHuman: `${humanizeBytes(0)}/s`,
startTime: null,
endTime: null,
eta: null,
etaHuman: null
}
},
lastModifiedDate: new Date(file.lastModified),
sub: undefined,
nativeFile: file
};
}
parseResponseHeaders(httpHeaders) {
if (!httpHeaders) {
return {};
}
return httpHeaders
.split('\n')
.map((x) => x.split(/: */, 2))
.filter((x) => x[0])
.reduce((acc, x) => {
acc[x[0]] = x[1];
return acc;
}, {});
}
}
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{ EventEmitter } from '@angular/core';\nimport { Observable, Subject, Subscription, finalize, mergeMap } from 'rxjs';\nimport { BlobFile, UploadFile, UploadInput, UploadOutput, UploadStatus } from './interfaces';\n\nexport function humanizeBytes(bytes: number): string {\n  if (bytes === 0) {\n    return '0 Byte';\n  }\n\n  const k = 1024;\n  const sizes: string[] = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];\n  const i: number = Math.floor(Math.log(bytes) / Math.log(k));\n\n  return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];\n}\n\nexport class NgUploaderService {\n  queue: UploadFile[];\n  serviceEvents: EventEmitter<UploadOutput>;\n  uploadScheduler: Subject<{ file: UploadFile; event: UploadInput }>;\n  subs: { id: string; sub: Subscription }[];\n  contentTypes: string[];\n  maxUploads: number;\n  maxFileSize: number;\n\n  constructor(\n    concurrency: number = Number.POSITIVE_INFINITY,\n    contentTypes: string[] = ['*'],\n    maxUploads: number = Number.POSITIVE_INFINITY,\n    maxFileSize: number = Number.POSITIVE_INFINITY\n  ) {\n    this.queue = [];\n    this.serviceEvents = new EventEmitter<UploadOutput>();\n    this.uploadScheduler = new Subject();\n    this.subs = [];\n    this.contentTypes = contentTypes;\n    this.maxUploads = maxUploads;\n    this.maxFileSize = maxFileSize;\n\n    this.uploadScheduler\n      .pipe(mergeMap(upload => this.startUpload(upload), concurrency))\n      .subscribe(uploadOutput => this.serviceEvents.emit(uploadOutput));\n  }\n\n  handleFiles(incomingFiles: FileList): void {\n    const allowedIncomingFiles = [].reduce.call(\n      incomingFiles,\n      (acc: unknown, checkFile: File, i: number) => {\n        const futureQueueLength = (acc as File[]).length + this.queue.length + 1;\n        if (\n          this.isContentTypeAllowed(checkFile.type) &&\n          futureQueueLength <= this.maxUploads &&\n          this.isFileSizeAllowed(checkFile.size)\n        ) {\n          acc = (acc as File[]).concat(checkFile);\n        } else {\n          const rejectedFile: UploadFile = this.makeUploadFile(checkFile, i);\n          this.serviceEvents.emit({ type: 'rejected', file: rejectedFile });\n        }\n\n        return acc as File[];\n      },\n      [] as File[]\n    ) as File[];\n\n    this.queue.push(\n      ...allowedIncomingFiles.map((file: File, i: number) => {\n        const uploadFile: UploadFile = this.makeUploadFile(file, i);\n        this.serviceEvents.emit({ type: 'addedToQueue', file: uploadFile });\n        return uploadFile;\n      })\n    );\n\n    this.serviceEvents.emit({ type: 'allAddedToQueue' });\n  }\n\n  initInputEvents(input: EventEmitter<UploadInput>): Subscription {\n    return input.subscribe((event: UploadInput) => {\n      switch (event.type) {\n        case 'uploadFile':\n          const uploadFileIndex = this.queue.findIndex(file => file === event.file);\n          if (uploadFileIndex !== -1 && event.file) {\n            this.uploadScheduler.next({ file: this.queue[uploadFileIndex], event: event });\n          }\n          break;\n        case 'uploadAll':\n          const files = this.queue.filter(file => file.progress.status === UploadStatus.Queue);\n          files.forEach(file => this.uploadScheduler.next({ file: file, event: event }));\n          break;\n        case 'cancel':\n          const id = event.id || null;\n          if (!id) {\n            return;\n          }\n          const subs = this.subs.filter(sub => sub.id === id);\n          subs.forEach(sub => {\n            if (sub.sub) {\n              sub.sub.unsubscribe();\n              const fileIndex = this.queue.findIndex(file => file.id === id);\n              if (fileIndex !== -1) {\n                this.queue[fileIndex].progress.status = UploadStatus.Cancelled;\n                this.serviceEvents.emit({ type: 'cancelled', file: this.queue[fileIndex] });\n              }\n            }\n          });\n          break;\n        case 'cancelAll':\n          this.subs.forEach(sub => {\n            if (sub.sub) {\n              sub.sub.unsubscribe();\n            }\n\n            const file = this.queue.find(uploadFile => uploadFile.id === sub.id);\n            if (file) {\n              file.progress.status = UploadStatus.Cancelled;\n              this.serviceEvents.emit({ type: 'cancelled', file: file });\n            }\n          });\n          break;\n        case 'remove':\n          if (!event.id) {\n            return;\n          }\n\n          const i = this.queue.findIndex(file => file.id === event.id);\n          if (i !== -1) {\n            const file = this.queue[i];\n            this.queue.splice(i, 1);\n            this.serviceEvents.emit({ type: 'removed', file: file });\n          }\n          break;\n        case 'removeAll':\n          if (this.queue.length) {\n            this.queue = [];\n            this.serviceEvents.emit({ type: 'removedAll' });\n          }\n          break;\n      }\n    });\n  }\n\n  startUpload(upload: { file: UploadFile; event: UploadInput }): Observable<UploadOutput> {\n    return new Observable(observer => {\n      const sub = this.uploadFile(upload.file, upload.event)\n        .pipe(\n          finalize(() => {\n            if (!observer.closed) {\n              observer.complete();\n            }\n          })\n        )\n        .subscribe({\n          next: (output: UploadOutput) => {\n            observer.next(output);\n          },\n          error: (err: any) => {\n            observer.error(err);\n            observer.complete();\n          },\n          complete: () => {\n            observer.complete();\n          }\n        });\n\n      this.subs.push({ id: upload.file.id, sub: sub });\n    });\n  }\n\n  uploadFile(file: UploadFile, event: UploadInput): Observable<UploadOutput> {\n    return new Observable(observer => {\n      const url = event.url || '';\n      const method = event.method || 'POST';\n      const data = event.data || {};\n      const headers = event.headers || {};\n\n      const xhr = new XMLHttpRequest();\n      const time: number = new Date().getTime();\n      let progressStartTime: number = (file.progress.data && file.progress.data.startTime) || time;\n      let speed = 0;\n      let eta: number | null = null;\n\n      xhr.open(method, url, true);\n      xhr.withCredentials = event.withCredentials ? true : false;\n\n      xhr.upload.onprogress = (e: ProgressEvent) => {\n        if (e.lengthComputable) {\n          const percentage = Math.round((e.loaded * 100) / e.total);\n          const diff = new Date().getTime() - time;\n          speed = Math.round((e.loaded / diff) * 1000);\n          progressStartTime = (file.progress.data && file.progress.data.startTime) || new Date().getTime();\n          eta = Math.ceil((e.total - e.loaded) / speed);\n\n          file.progress = {\n            status: UploadStatus.Uploading,\n            data: {\n              percentage: percentage,\n              speed: speed,\n              speedHuman: `${humanizeBytes(speed)}/s`,\n              startTime: progressStartTime,\n              endTime: null,\n              eta: eta,\n              etaHuman: this.secondsToHuman(eta)\n            }\n          };\n\n          observer.next({ type: 'uploading', file: file });\n        }\n      };\n\n      xhr.upload.ontimeout = (e: ProgressEvent<EventTarget>) => {\n        observer.error(e);\n        observer.complete();\n      };\n\n      xhr.upload.onerror = (e: ProgressEvent<EventTarget>) => {\n        observer.error(e);\n        observer.complete();\n      };\n\n      xhr.upload.onabort = () => {\n        observer.complete();\n      };\n\n      xhr.onreadystatechange = () => {\n        if (xhr.readyState === XMLHttpRequest.DONE) {\n          const speedAverage = Math.round((file.size / (new Date().getTime() - progressStartTime)) * 1000);\n          file.progress = {\n            status: UploadStatus.Done,\n            data: {\n              percentage: 100,\n              speed: speedAverage,\n              speedHuman: `${humanizeBytes(speedAverage)}/s`,\n              startTime: progressStartTime,\n              endTime: new Date().getTime(),\n              eta: eta,\n              etaHuman: this.secondsToHuman(eta || 0)\n            }\n          };\n\n          file.responseStatus = xhr.status;\n\n          try {\n            file.response = JSON.parse(xhr.response);\n          } catch (e) {\n            file.response = xhr.response;\n          }\n\n          file.responseHeaders = this.parseResponseHeaders(xhr.getAllResponseHeaders());\n\n          observer.next({ type: 'done', file: file });\n          observer.complete();\n        }\n      };\n\n      try {\n        const uploadFile = <BlobFile>file.nativeFile;\n        const uploadIndex = this.queue.findIndex(outFile => outFile.nativeFile === uploadFile);\n\n        if (this.queue[uploadIndex].progress.status === UploadStatus.Cancelled) {\n          observer.complete();\n        }\n\n        Object.keys(headers).forEach(key => xhr.setRequestHeader(key, headers[key]));\n\n        let bodyToSend: FormData | BlobFile;\n\n        if (event.includeWebKitFormBoundary !== false) {\n          Object.keys(data).forEach(key => file.form.append(key, data[key]));\n          file.form.append(event.fieldName || 'file', uploadFile, uploadFile.name);\n          bodyToSend = file.form;\n        } else {\n          bodyToSend = uploadFile;\n        }\n\n        this.serviceEvents.emit({ type: 'start', file: file });\n        xhr.send(bodyToSend);\n      } catch (e) {\n        observer.complete();\n      }\n\n      return () => {\n        xhr.abort();\n      };\n    });\n  }\n\n  secondsToHuman(sec: number): string {\n    return new Date(sec * 1000).toISOString().substr(11, 8);\n  }\n\n  generateId(): string {\n    return Math.random().toString(36).substring(7);\n  }\n\n  setContentTypes(contentTypes: string[]): void {\n    if (typeof contentTypes !== 'undefined' && contentTypes instanceof Array) {\n      if (contentTypes.find((type: string) => type === '*') !== undefined) {\n        this.contentTypes = ['*'];\n      } else {\n        this.contentTypes = contentTypes;\n      }\n      return;\n    }\n    this.contentTypes = ['*'];\n  }\n\n  allContentTypesAllowed(): boolean {\n    return this.contentTypes.find((type: string) => type === '*') !== undefined;\n  }\n\n  isContentTypeAllowed(mimetype: string): boolean {\n    if (this.allContentTypesAllowed()) {\n      return true;\n    }\n    return this.contentTypes.find((type: string) => type === mimetype) !== undefined;\n  }\n\n  isFileSizeAllowed(fileSize: number): boolean {\n    if (!this.maxFileSize) {\n      return true;\n    }\n    return fileSize <= this.maxFileSize;\n  }\n\n  makeUploadFile(file: File, index: number): UploadFile {\n    return {\n      fileIndex: index,\n      id: this.generateId(),\n      name: file.name,\n      size: file.size,\n      type: file.type,\n      form: new FormData(),\n      progress: {\n        status: UploadStatus.Queue,\n        data: {\n          percentage: 0,\n          speed: 0,\n          speedHuman: `${humanizeBytes(0)}/s`,\n          startTime: null,\n          endTime: null,\n          eta: null,\n          etaHuman: null\n        }\n      },\n      lastModifiedDate: new Date(file.lastModified),\n      sub: undefined,\n      nativeFile: file\n    };\n  }\n\n  private parseResponseHeaders(httpHeaders: string): { [key: string]: string } {\n    if (!httpHeaders) {\n      return {};\n    }\n\n    return httpHeaders\n      .split('\\n')\n      .map((x: string) => x.split(/: */, 2))\n      .filter((x: string[]) => x[0])\n      .reduce((acc: { [key: string]: string }, x: string[]) => {\n        acc[x[0]] = x[1];\n        return acc;\n      }, {});\n  }\n}\n"]}