Flip/rotate pages

Introduction

The GroupDocs.Viewer Cloud enables you to rotate individual pages when viewing documents in HTML/PDF/JPG/PNG formats. To flip/rotate pages use the PageRotations property of ViewOptions class. There are three options that you can pass:

  • On90Degree - instructs to rotate page on 90-degree clockwise;
  • On180Degree - instructs to rotate page on 180-degree clockwise;
  • On270Degree - instructs to rotate page on 270-degree clockwise;

The following code snippet shows how to rotate output pages when viewing a document as PDF

API Usage

There are steps that usage of GroupDocs.Viewer Cloud consists of:

  1. Upload input document into cloud storage
  2. Render document or get document info
  3. Download rendered document from storage

Steps 1 and 3 are storage operations, please refer to this File API documentation for usage details.

Swagger UI lets you call this REST API directly from the browser.

cURL REST Example


* First get JSON Web Token
* Please get your Client Id and Client Secret from https://dashboard.groupdocs.cloud/applications. Kindly place Client Id in "client_id" and Client Secret in "client_secret" argument.
curl -v "https://api.groupdocs.cloud/connect/token" \
-X POST \
-d "grant_type=client_credentials&client_id=xxxx&client_secret=xxxx" \
-H "Content-Type: application/x-www-form-urlencoded" \
-H "Accept: application/json"

* cURL example to get document information
curl -v "https://api.groupdocs.cloud/v2.0/viewer/view" \
-X POST \
-H "Content-Type: application/json" \
-H "Accept: application/json" \
-H "Authorization: Bearer <jwt token>"
-d "{
  'FileInfo': {
    'FilePath': 'SampleFiles/sample.docx'
  },
  'ViewFormat': 'PDF',
  'RenderOptions': {
     'PageRotations': [
       {
         'PageNumber': 1,
         'RotationAngle': 'On90Degree'
       }
     ]
  }
}"


{
  "pages": null,
  "attachments": [],
  "file": {
    "path": "viewer/sample_docx/sample.pdf",
    "downloadUrl": "https://api-qa.groupdocs.cloud/v2.0/viewer/storage/file/viewer/sample_docx/sample.pdf"
  }
}

SDKs

The API is completely independent of your operating system, database system or development language. We provide and support API SDKs in many development languages in order to make it even easier to integrate. You can see our available SDKs list here.

SDK Examples


// For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-dotnet-samples
string MyClientSecret = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
string MyClientId = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

var configuration = new Configuration(MyClientId, MyClientSecret);
var apiInstance = new ViewApi(configuration);

var viewOptions = new ViewOptions
{
    FileInfo = new FileInfo
    {
        FilePath = "SampleFiles/sample.docx"
    },
    ViewFormat = ViewOptions.ViewFormatEnum.PDF,

    RenderOptions = new RenderOptions
    {
        PageRotations = new List<PageRotation>
        {
            new PageRotation
            {
                PageNumber = 1,
                RotationAngle = PageRotation.RotationAngleEnum.On90Degree
            }
        }
    }
};

var response = apiInstance.CreateView(new CreateViewRequest(viewOptions));


// For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-java-samples
string MyClientSecret = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
string MyClientId = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

Configuration configuration = new Configuration(MyClientId, MyClientSecret);
ViewApi apiInstance = new ViewApi(configuration);

FileInfo fileInfo = new FileInfo();
fileInfo.setFilePath("SampleFiles/sample.docx");
ViewOptions viewOptions = new ViewOptions();
viewOptions.setFileInfo(fileInfo);
viewOptions.setViewFormat(ViewFormatEnum.PDF);
RenderOptions renderOptions = new RenderOptions();
PageRotation pageRotation = new PageRotation();
pageRotation.setPageNumber(1);
pageRotation.setRotationAngle(RotationAngleEnum.ON90DEGREE);
renderOptions.addPageRotationsItem(pageRotation);
viewOptions.setRenderOptions(renderOptions);

ViewResult response = apiInstance.createView(new CreateViewRequest(viewOptions));


// For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-java-samples
string MyClientSecret = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
string MyClientId = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

Configuration configuration = new Configuration(MyClientId, MyClientSecret);
ViewApi apiInstance = new ViewApi(configuration);

FileInfo fileInfo = new FileInfo();
fileInfo.setFilePath("SampleFiles/sample.docx");
ViewOptions viewOptions = new ViewOptions();
viewOptions.setFileInfo(fileInfo);
viewOptions.setViewFormat(ViewFormatEnum.PDF);
RenderOptions renderOptions = new RenderOptions();
PageRotation pageRotation = new PageRotation();
pageRotation.setPageNumber(1);
pageRotation.setRotationAngle(RotationAngleEnum.ON90DEGREE);
renderOptions.addPageRotationsItem(pageRotation);
viewOptions.setRenderOptions(renderOptions);

ViewResult response = apiInstance.createView(new CreateViewRequest(viewOptions));


// For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-php-samples
use GroupDocs\Viewer\Model;
use GroupDocs\Viewer\Model\Requests;

$ClientId = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
$ClientSecret = ""; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

$configuration = new GroupDocs\Viewer\Configuration();
$configuration->setAppSid($ClientId);
$configuration->setAppKey($ClientSecret);

$apiInstance# new GroupDocs\Viewer\ViewApi($configuration);

$viewOptions = new Model\ViewOptions();
$fileInfo = new Model\FileInfo();
$fileInfo->setFilePath("SampleFiles/sample.docx");
$viewOptions->setFileInfo($fileInfo);
$viewOptions->setViewFormat(Model\ViewOptions::VIEW_FORMAT_PDF);
$renderOptions = new Model\PdfOptions();
$pageRotation = new Model\PageRotation();
$pageRotation->setPageNumber(1);
$pageRotation->setRotationAngle(Model\PageRotation::ROTATION_ANGLE_ON90_DEGREE);
$renderOptions->setPageRotations([$pageRotation]);
$viewOptions->setRenderOptions($renderOptions);

$request = new Requests\CreateViewRequest($viewOptions);
$response = $apiInstance->createView($request);


// For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-node-samples
global.viewer# require("groupdocs-viewer-cloud");

global.clientId = "XXXX-XXXX-XXXX-XXXX"; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
global.clientSecret = "XXXXXXXXXXXXXXXX"; // Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

global.viewApi = viewer_cloud.ViewApi.fromKeys(clientId, clientSecret);

let fileInfo = new viewer_cloud.FileInfo();
fileInfo.filePath = "SampleFiles/sample.docx";
let viewOptions = new viewer_cloud.ViewOptions();
viewOptions.fileInfo = fileInfo;
viewOptions.viewFormat = viewer_cloud.ViewOptions.ViewFormatEnum.PDF;
viewOptions.renderOptions = new viewer_cloud.PdfOptions();
let pageRotation = new viewer_cloud.PageRotation();
pageRotation.pageNumber = 1;
pageRotation.rotationAngle = viewer_cloud.PageRotation.RotationAngleEnum.On90Degree;
viewOptions.renderOptions.pageRotations = [pageRotation];

let request = new viewer_cloud.CreateViewRequest(viewOptions);
let response = await viewApi.createView(request);


# For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-python-samples
import groupdocs_viewer_cloud

client_id = "XXXX-XXXX-XXXX-XXXX" # Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
client_secret = "XXXXXXXXXXXXXXXX" # Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

apiInstance# groupdocs_viewer_cloud.ViewApi.from_keys(client_id, client_secret)

view_options = groupdocs_viewer_cloud.ViewOptions()
view_options.file_info = groupdocs_viewer_cloud.FileInfo()
view_options.file_info.file_path = "SampleFiles/sample.docx"
view_options.view_format = "PDF"
view_options.render_options = groupdocs_viewer_cloud.PdfOptions()
page_rotation = groupdocs_viewer_cloud.PageRotation()
page_rotation.page_number = 1
page_rotation.rotation_angle = "On90Degree"
view_options.render_options.page_rotations = [page_rotation]

request = groupdocs_viewer_cloud.CreateViewRequest(view_options)
response = apiInstance.create_view(request)


# For complete examples and data files, please go to https://github.com/groupdocs-viewer-cloud/groupdocs-viewer-cloud-ruby-samples
require 'groupdocs_viewer_cloud'

$client_id = "XXXX-XXXX-XXXX-XXXX" # Get Client Id and Client Secret from https://dashboard.groupdocs.cloud
$client_secret = "XXXXXXXXXXXXXXXX" # Get Client Id and Client Secret from https://dashboard.groupdocs.cloud

apiInstance = GroupDocsViewerCloud::ViewApi.from_keys($client_id, $client_secret)

viewOptions = GroupDocsViewerCloud::ViewOptions.new
viewOptions.file_info = GroupDocsViewerCloud::FileInfo.new
viewOptions.file_info.file_path = "SampleFiles/sample.docx"
viewOptions.view_format = "PDF"
viewOptions.render_options = GroupDocsViewerCloud::PdfOptions.new
page_rotation = GroupDocsViewerCloud::PageRotation.new
page_rotation.page_number = 1
page_rotation.rotation_angle = "On90Degree"
viewOptions.render_options.page_rotations = [page_rotation]

request = GroupDocsViewerCloud::CreateViewRequest.new(viewOptions)
response = apiInstance.create_view(request)