Introduction

Beginning with yuuvis® RAD 9.0, this new viewer-service is part of the yuuvis® RAD service infrastructure stack. It offers to display several common file types directly within a yuuvis® RADclient application. It serves within the yuuvis® RAD client and can readily be integrated into a custom client. It is designed to allow for easy integration of further viewers in addition to the free ones included already.

This article is intended for administrators who want to know about the supported file types so they can decide whether to let the viewer service be extended for not supported ones.

Supported Types

All of the following formats are supported by the viewer service. Some others like Microsoft Office files including MSG-formated e-mails are supported by the rendition service provided that it is installed and running.

For unsupported file types, the viewer service sends a notification and a download link, allowing for the content to be downloaded and viewed by an external application.

Audio

Used component: By default, audio files are natively played by the browser with HTML5 audio (that is a subject of the HTML5 Audio specification).

Default component: Used component.

Mimetype: mpeg, mp3, ogg, wav

All played files are streamed to prevent unnecessary data downloads. The autoplay is set to false.

Image

Used component: Custom Angular Application with angular-x-image-viewer plug-in.

Default component: By default, the supported mimeTypes are rendered in the standard HTML img tag.

Mimetypes: jpeg, gif, png, svg, bmp, ico

Not supported file types are by default offered as a download.

Image (tiff/tif)

Used component: Native image rendering as base64 encoded.

Default component: By default, the supported mimeTypes are rendered in the standard HTML img tag.

Mimetypes: tiff, tif

JSON

Used component: Custom Angular application with ngx-json-viewer plugin.

Default component: Used component.

Mimetype: application/json 

E-Mails

Used component: eml files are parsed by mailparser, msg files are parsed by custom parser inspired by (msgreader)

Default component: Used component.

Mimetypes : message/rfc822 (eml), beginning with 2021 Winter Alpha2: application/vnd.ms-outlook (msg)

Markdown (text/markdown)

Used component: Custom React application with markdown-to-jsx plug-in. / Custom Angular application with showdown plug-in.

Default component: Used component.

Mimetypes: x-web-markdown, markdown

Open Document Format

The ODFs are currently resolved as application/zip. The viewer analyses all such mime types additionally and reacts in this case on the file extension that must be provided.

Used component: Files are parsed and rendered with https://webodf.org/

Default component: Used component.

File extension: odt, ods, odp

Mimetypes: application/zip (as resolved by yuuvis core service)

Text (text/plain)

Used component: By default, plain text is natively rendered by the Browser.

Default component: Used component.

Mimetypes: plain

XML(text/xml)

Used component: By default xml is natively rendered as text by the Browser.

Default component: Used component.

Mimetypes: xml

PDF

Used component: PDF.js which is a Mozilla project.

Default component: Used component.

Mimetypes: application/pdf

The ranging support provided by PDF.js is supported by the Web-API Gateway as well.

Video

Used component:  By default video files are natively played by the browser with HTML5 Video (that is a subject of the HTML5 Video specification).

Default component: Used component.

Mimetypes: mpeg, mp4, ogg, webm

All played files are streamed to prevent unnecessary data downloads. The autoplay is set to false.

Zip

Used component: Native string rendering

Default component: Used component.

Mimetype: x-zip-compressed, zip

The content of the zip container is read and the name and paths are printed out.

Customizing

The viewer service can be extended as described in this section.

Integration into 3rd party application