[Boost-users] Problem with Serialization: invalid signature

Subject: [Boost-users] Problem with Serialization: invalid signature
From: Alexander Striffeler (a.striffeler_at_[hidden])
Date: 2013-04-04 04:59:10

Hi all

I have some trouble with the serialization of objects in C++ using 
boost. Since there was some strange behaviour in the code, I tried to 
serialize and deserialize a sample object isolated trying two versions:

|deSerialize(Packet p1, Packet p2){    // Version 1 using stringstreams
     std::ostringstream *serialized = new std::ostringstream[2];||
||serialized[0]=std::ostringstream(std::ios_base::binary);||
||serialized[1]=std::ostringstream(std::ios_base::binary);||
||
||    boost::archive::text_oarchive oa(serialized[0]);||
||    oa << p1;||
||
||    boost::archive::text_oarchive oa2(serialized[1]);||
||    oa2 << p2;||
||
||    std::string s1, s2;||
||
||    s1 = serialized[0].str();||
||    s2 = serialized[1].str();||
||
||     //deserialize
     CCNDataPkt newPacket;
     std::istringstream inputStream(s2, std::ios_base::binary);
     boost::archive::text_iarchive ia(inputStream);

|

|     ia >> newPacket;|  // throws boost::archive::archive_exception: invalid signature.

}

and

|deSerialize(Packet p1, Packet p2){    // Version 2 using ofstreams
||std::ofstream of("deleteme",std::ios_base::binary);||
||    boost::archive::binary_oarchive oa(of);||
||    oa << p1;||
||
||    std::ifstream ifstr("deleteme", std::ios_base::binary);||
||    CCNDataPkt newp;||
||    boost::archive::binary_iarchive ia(ifstr);||
|

|     ia >> newp;|     // boost::archive::archive_exception: invalid signature.

}

However, both variants returned an invalid signature exception even 
though I haven't changed anything on the serialized data. Does anyone 
know what is wrong in either of the examples above? The methods for 
serializing the custom object 'Packet' are implemented according to the 
boost serialization tutorial (non-intrusive version splitted)

Any hints are very much appreciated - TIA!

Cheers,
Alex