ng2-pdfjs-viewer

Angular 2+ PDFJS viewer with Mozilla's ViewerJS

This is a simple library wraps mozilla's pdfjs and viewerjs into an angular2+ component.

Installation

Step 1: To install ng2-pdfjs-viewer, run:

$ npm install ng2-pdfjs-viewer --save

And then configure it in your Angular AppModule:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';

// Import PdfJsViewerModule module
import { PdfJsViewerModule } from 'ng2-pdfjs-viewer';

@NgModule({
  declarations: [
    AppComponent,
  ],
  imports: [
    BrowserModule,
    // Add to declarations
    PdfJsViewerModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Step 2: To use this library you need a copy of pdfjs

1. Using modified version of viewerJs available in the package (Recommended approach)

   • Either copy node_modules\ng2-pdfjs-viewer\pdfjs to your public or asset folder Or use TransferWebpackPlugin or something similar to make sure the static files are accessible from the public folder in your application/webserver. Please note, if you decide to put pdfjs folder anywhere else other than the assets folder, make sure you also set [pdfJsFolder] property to help locate the folder.

   TransferWebpackPlugin Sample code

   var TransferWebpackPlugin = require('transfer-webpack-plugin');
   ...
   plugins: [
     new TransferWebpackPlugin([
       { from: 'node_modules\ng2-pdfjs-viewer\pdfjs', to: path.join(__dirname, 'assets') }
     ])
   ]
   

   Now you can use additional settings such as
   [pdfJsFolder]: To set the folder path under web and build resides.
   [externalWindow]: To decide pdf should be inline or in a new tab
   [openFile]: Show/hide open file icon
   [viewBookmark]: Show/hide bookmark icon
   [download]: Show/hide download icon
   [showSpinner]: Show a simple css based spinner/progress before the pdf loads

OR

1. Using pdf-js-gh-pages
   • Download pdfjs-gh-pages from here: https://github.com/mozilla/pdf.js/archive/gh-pages.zip and extract it.
   • Create a pdfjs folder under your angular2+ applications assets folder
   • Copy pdf.js-gh-pages/build and pdf.js-gh-pages/web folders from extracted package to pdfjs folder.
   • The web/ directory contains a 1 MB PDF file called "compressed.tracemonkey-pldi-09.pdf". This file is a sample and can safely be removed.
     ps: More info can be found here: https://github.com/mozilla/pdf.js/wiki/setup-pdf.js-in-a-website

Usage

For your convenience a sample app using angular6 is available under this repository, if you would like to see it in action (Folder ng6SampleApp)

Once your PdfJsViewerComponent is imported you can use it in your Angular application like this:

<!-- You can now use your library component in app.component.html -->
<h1>
  {{title}}
</h1>
<ng2-pdfjs-viewer pdfSrc="your pdf file path"></ng2-pdfjs-viewer>

Here is a use case to download and open the pdf as byte array and open in new tab/window: Please note, pdfSrc can be a Blob or Uint8Array as well For [externalWindow]="true" to work, pop-ups needs to be enabled at browser level

<!-- your.component.html -->
<button (click)="openPdf();">Open Pdf</button>

<!-- Please note, you need a copy of https://github.com/intbot/ng2-pdfjs-viewer/tree/master/pdfjs for some of the below features to work -->
<ng2-pdfjs-viewer #pdfViewer style="width: 800px; height: 400px"
                  [pdfJsFolder]="'pdfjs'"
                  [externalWindow]="true"
                  [downloadFileName]="'mytestfile.pdf'"
                  [openFile]="false"
                  [viewBookmark]="false"
                  [download]="false"></ng2-pdfjs-viewer>

<!-- your.component.ts-->
export class RateCardComponent implements OnInit {
  @ViewChild('pdfViewer') pdfViewer
  ...

  private downloadFile(url: string): any {
    return this.http.get(url, { responseType: ResponseContentType.Blob }).map(
      (res) => {
        return new Blob([res.blob()], { type: "application/pdf" });
      });
  }

  public openPdf() {
    let url = "url to fetch pdf as byte array";
    // url can be local url or remote http request to an api/pdf file. 
    // E.g: let url = "assets/pdf-sample.pdf";
    // E.g: https://github.com/intbot/ng2-pdfjs-viewer/tree/master/sampledoc/pdf-sample.pdf
    // E.g: http://localhost:3000/api/GetMyPdf
    // Please note, for remote urls to work, CORS should be enabled at the server. Read: https://enable-cors.org/server.html

    this.downloadFile(url).subscribe(
      (res) => {
        this.pdfViewer.pdfSrc = res; // pdfSrc can be Blob or Uint8Array
      }
    );
  }

Additional Information

Given below are examples of writing server apis(In aspnetcore c#) which returns pdfs as byte array. You can choose any server side technology as long as pdf is returned as byte array

Use case 1. As a RDLC local report viewer

[HttpGet]
[Route("MyReport")]
public IActionResult GetReport()
{
   // var reportObjectList1
   // var reportObjectList2
   var reportViewer = new ReportViewer {ProcessingMode = ProcessingMode.Local};
   reportViewer.LocalReport.ReportPath = "Reports/MyReport.rdlc";

   reportViewer.LocalReport.DataSources.Add(new ReportDataSource("NameOfDataSource1", reportObjectList1));
   reportViewer.LocalReport.DataSources.Add(new ReportDataSource("NameOfDataSource2", reportObjectList1));

   Warning[] warnings;
   string[] streamids;
   string mimeType;
   string encoding;
   string extension;

   var bytes = reportViewer.LocalReport.Render("application/pdf", null, out mimeType, out encoding, out extension, out streamids, out warnings);

   // The below content-disposition is lost when we create Blob() object in client browser. Hence commented out
   //var cd = new System.Net.Mime.ContentDisposition
   //{
   //    FileName = "somepdf.pdf",
   //    Inline = true
   //};
   //Response.Headers.Add("Content-Disposition", cd.ToString());
   
   return File(bytes, "application/pdf")
}

Use case 2. Return a physical pdf from server

[HttpGet]
[Route("GetMyPdf")]
public IActionResult GetMyPdf()
{
   var stream = await {{__get_stream_here__}}
   return File(stream, "application/pdf")); // FileStreamResult
   
  // OR
  // var bytes = await {{__get_bytes_here__}}
  // return File(bytes, "application/pdf")
}

Other projects worth mentioning

1. Angular 5+ ng2-pdf-viewer
2. AngularJS angular-pdfjs-viewer

License

MIT © Code Hippie