ngx-filesaver

Simple file save with FileSaver.js

中文版

Examples

• demo
• Stackblitz

Installation

$ npm install file-saver ngx-filesaver
# Or when using yarn
$ yarn add file-saver ngx-filesaver
# Or when using pnpm
$ pnpm install file-saver ngx-filesaver

Add the FileSaverModule module to your project：

import { FileSaverModule } from 'ngx-filesaver';

@NgModule({
  imports: [FileSaverModule],
})
export class AppModule {}

Instructions

There are two ways to save a file: using FileSaverService.save() or using the fileSaver directive.

1、FileSaverService

constructor(private _http: Http, private _FileSaverService: FileSaverService) {
}

onSave() {
  this._http.get('demo.pdf', {
    responseType: ResponseContentType.Blob // This must be a Blob type
  }).subscribe(res => {
    this._FileSaverService.save((<any>res)._body, fileName);
  });
}

2、fileSaver directive

Configuration example

<button
  type="button"
  fileSaver
  [method]="'GET'"
  [fileName]="'中文pdf.pdf'"
  [url]="'assets/files/demo.pdf'"
  [header]="{ token: 'demo' }"
  [query]="{ pi: 1, name: 'demo' }"
  (success)="onSuc($event)"
  (error)="onErr($event)"
>
  Download PDF
</button>

fileSaver： the directive name Parameters

Parameter	Description	Type	Default
method	Request method type	string	GET
url	Request URL	string	-
fileName	Filename when downloading	string	-
query	Additional query parameters. Equivalent to params value	string	-
header	Header configuration. Usually used for especifying access tokens	any	-
fsOptions	FileSaver.js config, can be set autoBom value	FileSaverOptions	-
success	Download success callback	EventEmitter<HttpResponse<Blob>>	-
error	Download error callback	EventEmitter<any>	-

Custom HTTP type

<button type="button" fileSaver [http]="onRemote('pdf', true)">Download PDF</button>

onRemote(type: string, fromRemote: boolean): Observable<Response> {
  return this._http.get(`assets/files/demo.${type}`, {
    responseType: ResponseContentType.Blob
  }).map(response => {
    response.headers.set('filename', `demo.${type}`)
    return response;
  });
}

About filenames

The name for the downloaded file is obtained with the following priority:

1. fileName
2. response.headers.get('filename')
3. response.headers.get('x-filename')。

If you are requesting a CORS address, you need to pay attention to the request headers. Setting Access-Control-Allow-Headers: filename should be sufficient

Class Name

Class Name	Description
filesaver__not-support	Not Supported Browsers
filesaver__disabled	During http request

Configuring CommonJS dependencies

WARNING in node_modules/ngx-filesaver/ivy_ngcc/fesm2015/ngx-filesaver.js depends on file-saver. CommonJS or AMD dependencies can cause optimization bailouts.

We cannot change this, the only way is to ignore it:

"build": {
  "builder": "@angular-devkit/build-angular:browser",
  "options": {
     "allowedCommonJsDependencies": [
        "file-saver"
     ]
     ...
   }
   ...
},