Solved

C# ->> Memcache and deserialisation

Posted on 2014-03-24
8
303 Views
Last Modified: 2014-03-24
Hi,

I have a little C# application that successfully collects a value from memcache, it then attemptss to deserialise what I have using a memoryStream and BinaryFormatter.

Here is the code...

using (MemcachedClient writeClient = new MemcachedClient())
            {                
                string frObj= writeClient.Get<string>("myser");                
                byte[] byteArray = Encoding.ASCII.GetBytes(frObj);
                MemoryStream stream = new MemoryStream(byteArray);
                stream.Position = 0;
                BinaryFormatter bf = new BinaryFormatter();
                object d = bf.Deserialize(stream);
            }

Open in new window


I can get at the data and retrieve it. I just cant deserialise it into an object. The follow line gives me a SerialisationException was unhandled runtime.
 object d = bf.Deserialize(stream);

Open in new window


It states the following.
End of Stream encountered before parsing was completed.

I was wondering if anyone can help me to resolve this and prevent this runtime error or at least handle it.

Thank you.
Regards,
0
Comment
Question by:meetsys
  • 4
  • 4
8 Comments
 
LVL 74

Expert Comment

by:käµfm³d 👽
Comment Utility
Deserialize the byte array that the MemoryStream holds, not the MemoryStream itself. In other words, change line 8 to:

 object d = bf.Deserialize(stream.ToArray());

Open in new window

0
 

Author Comment

by:meetsys
Comment Utility
That just gives off more runtime errors.

I get this one...

cannot convert from 'byte[]' to 'System.IO.Stream'

and an invalid arguments. This site is great. I never know about it before. Any ideas where I am going wrong.
0
 
LVL 74

Expert Comment

by:käµfm³d 👽
Comment Utility
What does your serialization code look like?
0
 

Author Comment

by:meetsys
Comment Utility
The serialisation code is a string of data that comes from another program. In fact it is actually serialised in .php and then passed to the 3rd party memcache and then picked up in c#. I'm just trying to deserialise it, not worried if it comes out wrong. Even if its not the same as how it went in. Just want to have something output.
0
Top 6 Sources for Identifying Threat Actor TTPs

Understanding your enemy is essential. These six sources will help you identify the most popular threat actor tactics, techniques, and procedures (TTPs).

 
LVL 74

Expert Comment

by:käµfm³d 👽
Comment Utility
If we're talking about the same PHP code that you demonstrated in your previous question, then I don't see where there is any serialization going on. Even if there were, you are talking about serialization/deserialization between two different programming languages. If you truly are serializing in your PHP code, then you need to use a form of serialization that is more cross-platform, like XML or JSON.
0
 

Author Comment

by:meetsys
Comment Utility
Sure I get it. But it should still do something. Some sort of process that doesn't involve the runtime error I was enquiring about. Thats all I am looking to resolve at present.
0
 
LVL 74

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
Comment Utility
OK, then if I am correct in that you are not serializing in the PHP, then simply remove the BinaryFormatter business.

i.e.

using (MemcachedClient writeClient = new MemcachedClient())
{                
    string frObj = writeClient.Get<string>("myser");
}

Open in new window


Since it's a string that you put into memcached, that should be what you are getting back. No need to deserialize anything. Had you put something more involved into memcached--say a JSON object--then deserailization may come into play.
0
 

Author Closing Comment

by:meetsys
Comment Utility
Thanks for all your advise kaufmed. Really appreciate it. Tricky business, some of this serialisation, memcache stuff. Thanks
0

Featured Post

How to improve team productivity

Quip adds documents, spreadsheets, and tasklists to your Slack experience
- Elevate ideas to Quip docs
- Share Quip docs in Slack
- Get notified of changes to your docs
- Available on iOS/Android/Desktop/Web
- Online/Offline

Join & Write a Comment

A short article about a problem I had getting the GPS LocationListener working.
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
An introduction to basic programming syntax in Java by creating a simple program. Viewers can follow the tutorial as they create their first class in Java. Definitions and explanations about each element are given to help prepare viewers for future …
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now