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Fezziwig

Serialization

7 posts in this topic

Can anyone recommend a fast method to serialize a class or struct so it can be send over a socket, and a short example would be nice.
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You can send struct or class directly, assuming they don't have any pointers inside, packing is right, byte order is right and they don't have any virtual methods.
To fix any of those problems, copy data you want to send into single buffer, ex. array, and send it.
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Do you know how to serialize (save) that struct or class to a file?
If so, treat a block of memory as a "file" and "save" it to there. Then send that block as a message over the network.
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Ok thanks for the help. Because I'm sending quite large data structures, I decided to use the boost libraries (good choice?). I can send the structs like so;
[CODE]
std::ostringstream archive_stream;
boost::archive::text_oarchive archive(archive_stream);
archive << myStruct;
sendto(Socket, archive_stream.str().c_str(), sizeof(archive_stream.str().c_str()), 0, (SOCKADDR *) & SockAddr, sizeof(SockAddr));
[/CODE]
but how to I receive them on the other end? Edited by Fezziwig
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I would recommend that you take a look at messagepack, it is used to serialize/deserialize data (for sending over network or storing to file).
[url="http://msgpack.org/"]http://msgpack.org/[/url] Edited by flodihn
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If you're sending very large data you may want to consider using some light zlib compression as well (if your network performance is suffering), but that's something to do later, once you've got this working.

Remember that 'serialize' is just a fancy word for 'put in a specific order'. If you hold the relevant data in your classes as a member struct then you should have an easier time serializing, since you can just grab that struct from the object.
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The [url="http://webEbenezer.net"]C++ Middleware Writer[/url] serializes objects so they can be sent across a network. There are links to examples on the home page. Edited by wood_brian
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