Gaurav Gupta's dashboard

Hi Louis,

To share a presentation with your contacts, simply copy paste the URL inside the text-box on the right hand side of the presentation, labeled "URL".

Please feel free to write back incase you need any more help.

Have you applied for an API key on Slideshare? From your code it seems you are not really passing the timestamp and hash at all! Apart from a username and password, you also need a secret key and shared secret.

Try this code. It works. Paste it into a simple HTML file and open it in your browser. Remember that when uploading files, the enctype='multipart/form-data' is required.

<form>
<input name="api_key" type="hidden" value="api_key" />
<input name="ts" type="hidden" value="ts" />
<input name="hash" type="hidden" value="hash_for_above_ts" />
<input name="username" type="hidden" value="username" />
<input name="password" type="hidden" value="password" />
<input name="slideshow_title" type="hidden" value="Whatever title" />
<input name="slideshow_srcfile" type="file" />
<input type="submit" value="Submit" />
</form>

In the form tag, use the following parameters:

action="http://www.slideshare.net/api/1/upload_slideshow"
method="post"
enctype='multipart/form-data'

Oops. There seems to be a problem with getsatisfaction.com. The code I mentioned got changed when posting. In the form tag, use the following parameters:

action="http://www.slideshare.net/api/1/upload_slideshow"
method="post"
enctype='multipart/form-data'

Try this code. It works. Paste it into a simple HTML file and open it in your browser. Remember that when uploading files, the enctype='multipart/form-data' is required.

<form>
<input name="api_key" type="hidden" value="api_key" />
<input name="ts" type="hidden" value="ts" />
<input name="hash" type="hidden" value="hash_for_above_ts" />
<input name="username" type="hidden" value="username" />
<input name="password" type="hidden" value="password" />
<input name="slideshow_title" type="hidden" value="Whatever title" />
<input name="slideshow_srcfile" type="file" />
<input type="submit" value="Submit" />
</form>

Hi Peta,

Can you please open this page in Internet Explorer and tell us which version of the Flash plugin you have installed:

http://kb.adobe.com/selfservice/viewC...

Gaurav Gupta

Hi Michael,

I am Gaurav from Slideshare. We received your code through the feedback mail you sent. The problem is in the SHA1 hash calculation you are doing. The method you are using does not result in a correct hash calculation.

Calculate SHA1 like it's done in this sample code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Net;
using System.Xml;
using System.Web;
using System.Security.Cryptography;

namespace ConsoleApplication1
{
class Program
{
public static string CalculateSHA1(string text, Encoding enc)
{
byte[] buffer = enc.GetBytes(text);
SHA1CryptoServiceProvider cryptoTransformSHA1 =
new SHA1CryptoServiceProvider();
string hash = BitConverter.ToString(
cryptoTransformSHA1.ComputeHash(buffer)).Replace("-", "").ToLower();

return hash;
}

public static void getapi(String api_key,String shared_secret,String tags)
{
string timestamp = Convert.ToInt32(Math.Floor((DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds)).ToString();
Console.Write("Timestamp:" + timestamp + "\n");

string lcUrl = "http://www.slideshare.net/api/1/get_slideshow_by_tag?api_key=" + api_key + "&ts=" + timestamp + "&hash=" + CalculateSHA1(shared_secret + timestamp, Encoding.UTF8) + "&tag=" + tags;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(lcUrl);

request.Method = "GET";
HttpWebResponse loWebResponse = (HttpWebResponse)request.GetResponse();
Encoding enc = Encoding.GetEncoding(1252);
StreamReader loResponseStream = new StreamReader(loWebResponse.GetResponseStream(), enc);

string lcHtml = loResponseStream.ReadToEnd();
Console.Write(lcHtml);

loWebResponse.Close();
loResponseStream.Close();

}

static void Main(string[] args)
{
getapi("api_key","shared_secret","tag");
}
}
}

Hope this helps. Please feel free to write back to us incase of any more questions.