I have some problems about "SlideShare API - slide_src parameter" in ASP.Net, C#

[Blumpy.tr]

Hey all,

I wrote a function to upload slides. my code is this:


public static string uploadSlideShow(string title, string description,
string tags, string slide_src)
{
initializeKeys();
string url = "http://www.slideshare.net/api/1/
upload_slideshow";

string parameters =
// Set the required parameters
"api_key=" + api_key +
"&ts=" + timestamp +
"&hash=" + CalculateSHA1(shared_secret + timestamp,
Encoding.UTF8) +
"&username=" + user +
"&password=" + pass +
"&slideshow_title=" + title +
"&slideshow_srcfile=" + slide_src +

// Set the optional parameters
"&slideshow_description=" + description +
"&slideshow_tags=" + tags +
"&make_src_public=" + "N";

// Set the required parameter
//"&slideshow_srcfile=";

return executePostCommand(url, parameters);
}

i called this function like :

string result = uploadSlideShow("test","test","test","test");

the return value of this was "6 Slideshow file isn't a source object".

in slideshare developer page, there is a DotNetUtil.zip file. i used
the executePostCommand in this.

you know that the function named executePostCommand is taking 2
parameter. and they are "string uri, string params". so how can i send
"slideshow_srcfile" parameter in a string?

i know my problem is slideshow_srcfile parameter. what should i send
for this?

Thanks all of you
Best wishes,
Blumpy.tr

[Gee Chuang]

Hi there,

The slideshow_srcfile parameter should be the actual file, not just a
string representing the path to the file on your local machine.

You'll need to send a multipart/form-data POST request.

Thanks
Gee

[Blumpy.tr]

Hi Gee,

Firstly, thanks for your reply.

I know that i have to send "multipart/form-data POST request". But
there is an official code sample "Microsoft .NET (C#) - DotNetUtil".
And it contains a function to execute a post command.

so

Can we say that "this function is not ok for uploading slides?"

And should i write my own function to uploading?

Thank you so much,
Blumpy.tr

[Gee Chuang]

Hi there,

Just took a look at the execute post command code. Unfortunately it
doesn't look like the function as-is will support file upload.

The only method using the post is getEmbedCode, and the values it
passes are all string values

Thanks
Gee

[Blumpy.tr]

Hi,

OK Gee, and thank you so much.

Thanks,
Blumpy.tr

[Blumpy.tr]

Hi again,

I tried to write my upload function but i guess i couldn do this.

The codes are here:

private static string executeUploadCommand(string parameters, string
fname, string ctype, byte[] file)
{
string boundary = "---WhatIsTheBoundary---";

if (api_key == null || shared_secret == null || timestamp
== null)
return "Keys must be initialized first";

WebRequest webRequest = WebRequest.Create("http://
www.slideshare.net/api/1/upload_slideshow");
webRequest.ContentType = "multipart/form-data; boundary="
+ boundary;
webRequest.Method = "POST";

string[] keys = parameters.Split(new char[] { '&' });

// Set the body of request
string message = "--" + boundary + "\r\n";
for (int i = 0; i < keys.Length; i++)
{
string[] param = keys[i].Split(new char[] { '=' });
message += "Content-Disposition: form-data; name=\"" +
param[0] + "\"";
message += "\r\n";
message += param[1];
message += "\r\n";
message += "--" + boundary + "\r\n";
}

message += "Content-Disposition: form-data; name=\"" +
"slideshow_srcfile" + "\"";
message += "; filename=\"" + fname + "\"";
message += "\r\n";
message += "Content-Type:" + ctype;
message += "\r\n";

byte[] bytes = Encoding.ASCII.GetBytes(message);
byte[] msgbyte = new byte[bytes.Length + file.Length];

Array.Copy(bytes, msgbyte, bytes.Length);
Array.Copy(file, 0, msgbyte, bytes.Length, file.Length);

Stream os = null;
try
{
webRequest.ContentLength = msgbyte.Length;
os = webRequest.GetRequestStream();
os.Write(msgbyte, 0, msgbyte.Length);
}
catch (WebException ex)
{
return ex.ToString();
}

finally
{
if (os != null)
{
os.Close();
}
}

try
{
WebResponse webResponse = webRequest.GetResponse();
if (webResponse == null)
{ return null; }
StreamReader sr = new StreamReader
(webResponse.GetResponseStream());
return sr.ReadToEnd().Trim();
}
catch (WebException ex)
{
return ex.ToString();
}
}

This function returns :

" Status: 500 Internal Server Error Content-Type: text/html
500 Internal Server Error "

When i debug the code, everything seems ok. i cant resolve the
problem.

Thanks,
Blumpy.tr

[Blumpy.tr]

Anoyone can help ?

Thx

On Jan 2, 3:44 pm, "Blumpy.tr" <blumpy...@gmail.com> wrote:
> Hi again,
>
> I tried to write my upload function but i guess i couldn do this.
>
> The codes are here:
>
> private static string executeUploadCommand(string parameters, string
> fname, string ctype, byte[] file)
>         {
>             string boundary = "---WhatIsTheBoundary---";
>
>             if (api_key == null || shared_secret == null || timestamp
> == null)
>                 return "Keys must be initialized first";
>

>             WebRequest webRequest = WebRequest.Create("http://www.slideshare.net/api/1/upload_slideshow");

[Gee Chuang]

Hi there,

From the other thread it sounds like you've got uploads to work?

Let me know if you're still having problems.

Thanks
Gee

[Blumpy.tr]

Hi Gee,

Thank you for your interest.

I resolved my problem and i can upload slides now.

This is my uploadFunction:

private static string executeUploadCommand(string parameters, string
fname, string ctype, byte[] file)
{

string boundary = "----WhatIsTheBoundary";

if (api_key == null || shared_secret == null || timestamp
== null)
return "Keys must be initialized first";

WebRequest webRequest = WebRequest.Create("http://
www.slideshare.net/api/1/upload_slideshow");
webRequest.ContentType = "multipart/form-data; boundary="
+ boundary;
webRequest.Method = "POST";

webRequest.Timeout = 60000;

string[] keys = parameters.Split(new char[] { '&' });

// Set the body of request

StringBuilder sb = new StringBuilder();
sb.Append("--");
sb.Append(boundary);
sb.Append("\r\n");

for (int i = 0; i < keys.Length; i++)
{
string[] param = keys[i].Split(new char[] { '=' });

sb.Append("Content-Disposition: form-data; name=\"" +
param[0] + "\"");
sb.Append("\r\n");
sb.Append("\r\n");
sb.Append(param[1]);
sb.Append("\r\n");
sb.Append("--");
sb.Append(boundary);
sb.Append("\r\n");
}
sb.Append("Content-Disposition: form-data; name=\"" +
"slideshow_srcfile" + "\"");
sb.Append("; filename=\"" + fname + "\"");
sb.Append("\r\n");
sb.Append("Content-Type:" + ctype);
sb.Append("\r\n");
sb.Append("\r\n");

string message = sb.ToString();

byte[] bytes = Encoding.UTF8.GetBytes(message);

byte[] msgbyte = new byte[bytes.Length + file.Length];

Array.Copy(bytes, msgbyte, bytes.Length);
Array.Copy(file, 0, msgbyte, bytes.Length, file.Length);

// Ending Boundry
StringBuilder sb2 = new StringBuilder();
sb2.Append("--");
sb2.Append(boundary);
sb2.Append("--");
string message2 = sb2.ToString();

byte[] bytes2 = Encoding.UTF8.GetBytes(message2);
byte[] msgbyte2 = new byte[bytes2.Length +
msgbyte.Length];

Array.Copy(msgbyte, msgbyte2, msgbyte.Length);
Array.Copy(bytes2, 0, msgbyte2, msgbyte.Length,
bytes2.Length);

Stream os = null;
try
{

webRequest.ContentLength = msgbyte2.Length;
os = webRequest.GetRequestStream();
os.Write(msgbyte2, 0, msgbyte2.Length);

}
catch (WebException ex)
{
return ex.ToString();
}

finally
{
if (os != null)
{
os.Close();
}
}

try
{
WebResponse webResponse = webRequest.GetResponse();
if (webResponse == null)
{ return null; }
StreamReader sr = new StreamReader
(webResponse.GetResponseStream());
return sr.ReadToEnd().Trim();
}
catch (WebException ex)
{
return ex.ToString();
}
}

I know that comments are missing But it may help other friends.

Its a sample for uploading slides to slideshare via api v1.0

Thank you and your developer team.

Best,
Blumpy.tr

[Gee Chuang]

Hi there,

Sorry we couldn't help you sooner, but I'm glad you got everything
working! =)

Gee

On Jan 29, 1:03 am, "Blumpy.tr" <blumpy...@gmail.com> wrote:
> Hi Gee,
>

> Thank you for your interest.
>
> I resolved my problem and i can upload slides now.
>
> This is my uploadFunction:
>
> private static string executeUploadCommand(string parameters, string
> fname, string ctype, byte[] file)
>         {
>             string boundary = "----WhatIsTheBoundary";
>
>             if (api_key == null || shared_secret == null || timestamp
> == null)
>                 return "Keys must be initialized first";
>

> ...
>
> read more »