Testing again, the Fetch works. But there is an instruction that stops working in WebBrowser. What I had planned did not work, I will have to look for other alternatives. 

	ls_get_invoice_pdf = 'function get_invoice_kraken() {'+&
'	document.body.innerHTML = `'+& 
'    <embed '+& 
'      src="/"'+& 
'      type="application/pdf" '+& 
'      width="800px" '+& 
'      height="600px" '+& 
'      id="DisplayPdf"'+& 
'    />'+&
'<p>This it work! </p>'+&
'`;'+&
'	document.querySelector("#DisplayPdf").style.background = "red";'+&
'    fetch(" '+ls_url+' ",{'+&
'        method: "GET",'+&
'       headers:{'+&
'            "Content-Type": "Application/PDF",'+&
'            "Authorization": "Bearer " + " '+mle_responsetoken.text+' " '+&
'        }'+&
'} )'+& 
'    .then(responseUsers =>{'+& 
'        if(responseUsers.status === 200){'+& 
'            return responseUsers.blob();'+&    //-->Change Blob to text view stream pdf
'        }'+& 
'    })'+& 
'    .then(BlobPDF => {'+&
'	   alert(BlobPDF)'+&
'          const domString = URL.createObjectURL(BlobPDF)'+&   //Error en WebBrowser display nothing
'          document.querySelector("#DisplayPdf").setAttribute("src",domString)'+&
'    })'+& 
'} get_invoice_kraken(); '
wb_webbrowser_pdf.evaluatejavascriptsync( ls_get_invoice_pdf)

it's a pity that it doesn't recognize or limit the evaluatejavascriptsync. It would be very useful to load complex scripts.

By accommodating the pure javascript I can customize the view, I hope it will help someone in the future or experiment to create great thing.

Hi Luis;

  Suggestion:  Once you have the Blob data (PDF), then write it to disk using PB's FIleOpen() and FileWriteEx() methods. Then use the Web Browser's Navigate() method pointing it to the local file (aka PDF) for viewing. Food for thought. HTH

Regards ... Chris

--------------------------------------------

Hello  Chris.
Thanks for your suggestion, I'll put it into practice again.
If you can guide me on what the steps to follow would be, I don't quite understand how to use those methods.

According to the FileReadEx example :

integer li_fnum
long ll_bytes
blob Emp_Id_Pic

//I understand that it is to create the image blob 
//I don't have the image path, I already have the blob, should I skip this step? 

li_fnum = FileOpen("C:\Users\pb2019\Pictures\rect296.png",StreamMode!)
messagebox("data li_fnum ",string(li_fnum))	


//I understand to put a state to the Blob to read 
//It should work only with this method, as I continue to save the PDF or send to WebBrowser 

ll_bytes = FileReadEx(li_fnum, Emp_Id_Pic)
messagebox("data ll_bytes ",string(ll_bytes))	

Best regards.

Hi Luis;

  Suggestion:  Once you have the Blob data (PDF), then write it to disk using PB's FIleOpen() and FileWriteEx() methods. Then use the Web Browser's Navigate() method pointing it to the local file (aka PDF) for viewing. Food for thought. HTH

Regards ... Chris

Hello Chris.

Thank you very much for the suggestion, it works great. I leave the code to help if someone needs it.

string ls_url, ls_msg
integer li_return, li_FileNum
String data_cuf, ls_get_invoice_pdf
Blob ls_body_blob

HttpClient Data_HttpClient
Data_HttpClient = CREATE HttpClient


ls_url = "http://api/by-cuf/"+data_cuf.text+"/pdf"


Data_HttpClient.setrequestheader( "Content-Type", "Application/pdf;chartset=UTF-8")
Data_HttpClient.setrequestheader( "Authorization", "Bearer " +  mle_responsetoken.text )
li_return = Data_HttpClient.sendrequest( "GET", ls_url, ls_body_blob)

ls_msg =	"Headers: " + string(Data_HttpClient.GetResponseHeaders( )) + '~r~n' + &
		"Response Body: " + String(len(ls_body_blob))
messagebox('Response Status', ls_msg)


if li_return = 1 and Data_HttpClient.GetResponseStatusCode( ) = 200 then
	Data_HttpClient.getresponsebody(ls_body_blob)

// path to save the pdf and display from WebBrowser
	li_FileNum = FileOpen("C:\gravetal\testblob.pdf",StreamMode!, Write!, Shared!, Replace!)
	FileWriteEx(li_FileNum,ls_body_blob)
	FileClose(li_FileNum)
	wb_webbrowser_pdf.navigate("C:\gravetal\testblob.pdf")
end if

destroy(Data_HttpClient)