PDFViewer works on localhost but fails on deployed server

Question

We are using the PDFviewer to show a document dynamically by calling

pdfViewer.Load("data:application/pdf;base64," + base64String, null);

this works on localhost but does not work when running on a deployed server

in the console we are getting the following errorsyncfusion-blazor-extended-91153b.min.js:1 Unexpected token T in JSON at position 0

SyntaxError: Unexpected token T in JSON at position 0

at JSON.parse (<anonymous>)

at e.pdfViewer.serverActionSettings.loadRequestHandler.onSuccess (https://oursite.com/_content/Syncfusion.Blazor.PdfViewer/scripts/pdfviewer-91153b.min.js:1:1251237)

at e.successHandler (https://oursite.com/_content/Syncfusion.Blazor.PdfViewer/scripts/pdfviewer-91153b.min.js:1:1455552)

at Object.ioSuccessHandler (https://oursite.com/_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor-extended-91153b.min.js:1:35778)

at https://oursite.com/_framework/blazor.server.js:1:70369

at new Promise (<anonymous>)

at e.beginInvokeJSFromDotNet (https://oursite.com/_framework/blazor.server.js:1:70335)

at https://oursite.com/_framework/blazor.server.js:1:26442

at Array.forEach (<anonymous>)

at e.invokeClientMethod (https://oursite.com/_framework/blazor.server.js:1:26412)

Vasugi Sivajothi · Answer

Hi Michael,We suspect that
the “Unexpected token T in JSON at position 0” error occurs due to the missing
of the pdfium
dll in your environment. We will create the pdfium based on the operating system at the runtime.
So, could you please try copying the below provided dll and paste it inside the folder into your project to resolve the issue or enable the write
permission for that folder?Pdfium.dllFor more information, please refer to the below UG link.https://blazor.syncfusion.com/documentation/pdfviewer/how-to/unexpected-tokenKindly try this and let us know if the issue resolves or not.Regards,Vasugi.

Michael Salzlechner · Answer

i tried copying the pdfium.dll file (from windows/x64 into the project folder with all the other dlls on the server. that did not seem to make a difference.

i looked at the link you posted but not sure how i would set the ReferencePath with a blazor SfPdfViewerServer component

are there any other dependencies for pdfi

Vasugi Sivajothi · Answer

Hi Michael,We suspect that the reported issue is due to
pdfium dll is not referred properly on your end. We suggest you refer to the
pdfium dll in the published folder and If you host the application in the Linux
service then you must install the Linux package
(Syncfusion.Blazor.PdfViewerServer.Linux) to run the application. So, please
confirm the hosting environment service. Kindly try this and let us know if the
issue resolves or not. If not, please share the hosting environment details and
package details. This will be helpful to investigate further and provide the
solution at the earliest. Or we can set up a web meeting to check the issue in
your environment and provide the solution. Please let us know your
availability. We will make every effort to have this scheduled on a date and
time of your convenience.Regards,Vasugi.

Michael Salzlechner · Answer

we are hosting this on a Amazon AWS Elastic Beanstalk Environment in an EC2 Instance running

IIS 10.0 on 64bit Windows Server 2019

We are building the project in Visual Studio and publishing the project from Visual Studio to AWS using the Visual Studio AWS tools.i saw the reference code in the sample for linux but am not sure how to add a reference to pdfium in a blazor SfPDFViewerServer component

Vasugi Sivajothi · Answer

Hi Michael,Thank you for the update. You can place the pdfium in your project in a folder called “Assets” and added this to .csproj file. Kindly try this and let us know if the issue resolves or not.Regards,Vasugi.