I need help - I can help - loadFromString results in 401 error

loadFromString results in 401 error

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=2907
Printed Date: 29 Sep 24 at 12:30AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: loadFromString results in 401 error

Posted By: MrPopup
Subject: loadFromString results in 401 error
Date Posted: 27 May 14 at 11:04PM

Good morning,

Using DLL version 10. Have tried both DPLLoadFromString and DPLLOadFromStringA. Same problem. Jade development environment is being used. This is the obny call I have had an issue with.

The code is:

vars

qp : PDF;

st : String;

begin

create qp transient; //create and unlock library

qp.loadFromFile("c:\temp\seka.pdf",""); //import existing pdf (4pages)

qp.deletePages(2,qp.pageCount-1); //delete all pages except page 1

qp.selectPage(1); //select page 1

st := qp.saveToString; //get pdf as a string and hold

write st.length; //check length of string

write st; //display string

delete qp; //delete and release library

create qp transient; //create and unlock library

qp.loadFromString(st,""); //load pdf from held string

write qp.lastErrorCode; //display error code

qp.saveToFile("c:\temp\test_save.pdf"); //save new document as a pdf

delete qp; //delete and release library

end;

All calls are successful except the loadFromString call.

Thank you.

Replies:

Posted By: Ingo
Date Posted: 28 May 14 at 8:27AM

is it okay with another dll-version?

If not: Please upload the pdf anywhere

and post the link - so we can check it.

Cheers, Ingo

-------------
Cheers,
Ingo

Posted By: MrPopup
Date Posted: 29 May 14 at 8:50PM

ftp site

219.89.207.2

US: quickpdf

PW pdf1004

Thank you.

Posted By: Ingo
Date Posted: 29 May 14 at 9:24PM

I think the problem is before the LoadFromString.

You should check each returning value.

What about the returning value of DeletePages?

It should be the number of the remaining pages.

I don't know Jade... the string content should be Ansi...

-------------
Cheers,
Ingo

Posted By: MrPopup
Date Posted: 29 May 14 at 9:47PM

QuickPDF Library Responses

DPLLoadFromFileA response: 1

DPLPageCount response: 4

DPLDeletePages response: 1

DPLPageCount response: 1

DPLSelectPage response: 1

String length: 219

LoadFronStringA response: 0

LastErrorCode response: 401

SaveToFile response: 1

Posted By: MrPopup
Date Posted: 29 May 14 at 10:17PM

I note that the DPLLoadFromStringA construct makes use of both char (ansi) and w_char (unicode) data types.

No other constructs that I have used mix the two types.

Thanks.

Posted By: AndrewC
Date Posted: 30 May 14 at 10:13AM

MrPopup,

Here is the C# wrapper code for LoadFromString and SaveToString ? It should be helpful with porting it to Jade. The C# wrapper is calling the DLL also.

Andrew.

public int LoadFromString(byte[] Source, string Password)

{

if (dll == null) return 0;

else

{

GCHandle gch = GCHandle.Alloc(Source, GCHandleType.Pinned);

IntPtr bufferID = dll.DebenuPDFLibraryCreateBuffer(instanceID, Source.Length);

dll.DebenuPDFLibraryAddToBuffer(instanceID, bufferID, gch.AddrOfPinnedObject(), Source.Length);

int result = dll.DebenuPDFLibraryLoadFromString(instanceID, bufferID, Password);

dll.DebenuPDFLibraryReleaseBuffer(instanceID, bufferID);

gch.Free();

return result;

}

public byte[] SaveToString()

{

if (dll == null) return new byte[0];

else

{

IntPtr data = dll.DebenuPDFLibrarySaveToString(instanceID);

int size = dll.DebenuPDFLibraryAnsiStringResultLength(instanceID);

byte[] result = new byte[size];

Marshal.Copy(data, result, 0, size);

return result;

}

Posted By: MrPopup
Date Posted: 31 May 14 at 9:45PM

Thank you Andrew. I am not sure how I would use this, but appreciate the effort.

Posted By: AndrewC
Date Posted: 04 Jun 14 at 7:14AM

Mr Popup,

You will need do some research and see how strings and arrays work in Jade. The code examples show how the C# wrapper loads and saves strings using the DLL calls.

Andrew.