ISSUU API - File Size Upload Problem

Question

User-1336361068 posted

Hi there

I am trying to utilise the API that issuu.com provide to upload a file to their website.

If I upload a small pdf file (200Kb) the process works fine. However when I try and upload a larger file (5Mb) I get an error message back from issuu.com that the required field "_uploadFilename" is missing. 

So I am wondering if my code isn't reading the file correctly/completely for the larger file and therefore I am not sending the required data.

My code is below for attaching the data and the pdf file to my HTTPWebRequest.

private static Stream GetPostStream(string fullFilePath, NameValueCollection formData, string boundary)
        {
            Stream postDataStream = new System.IO.MemoryStream();

            //adding form data
            string formDataHeaderTemplate = Environment.NewLine + "--" + boundary + Environment.NewLine +
            "Content-Dis-data; name=\"{0}\";" + Environment.NewLine + Environment.NewLine + "{1}";

            foreach (string key in formData.Keys)
            {
                byte[] formItemBytes = System.Text.Encoding.UTF8.GetBytes(string.Format(formDataHeaderTemplate, key, formData[key]));
                postDataStream.Write(formItemBytes, 0, formItemBytes.Length);
            }

            //adding file data
            FileInfo fileInfo = new FileInfo(fullFilePath);

            string fileHeaderTemplate = Environment.NewLine + "--" + boundary + Environment.NewLine + "Content-Dis-data; name=\"{0}\"; filename=\"{1}\"" + Environment.NewLine + "Content-Type: application/pdf" + Environment.NewLine + Environment.NewLine;

            byte[] fileHeaderBytes = System.Text.Encoding.UTF8.GetBytes(string.Format(fileHeaderTemplate, "file", fileInfo.FullName));

            postDataStream.Write(fileHeaderBytes, 0, fileHeaderBytes.Length);

            FileStream fileStream = fileInfo.OpenRead();

            byte[] buffer = new byte[1024];

            int bytesRead = 0;

            while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
            {
                postDataStream.Write(buffer, 0, bytesRead);
            }

            fileStream.Close();

            byte[] endBoundaryBytes = System.Text.Encoding.UTF8.GetBytes("--" + boundary + "--");
            postDataStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);


            return postDataStream;
        }

Can anyone provide any feedback.

Thanks

Nigel

Answer 1

User1927273029 posted

Hello,

Add this tag to you web.config and specify you sizein maxrequest property

 <httpRuntime maxRequestLength="20480" requestValidationMode="2.0"/>

Answer 2

User-1336361068 posted

Hi jassi_singh

Thanks for your response.

I do already have this set in my web.config. Also I have exceutionTimeout="300" on the httpRunTime setting which I trust isn't causing any problems..

So unfortunately this doesn't solve my mystery.

Thanks again for your input though.

Nigel