convert data from tcp socket in python

Question

I have a data struct that I am converting to uint8_t and sending it over a tcp socket connection. For the server side I have a python. How do I convert the data and display the struct information.

//data struct
typedef struct {
int enable;
string name;
int numbers[5];
float counter;
}Student;
 
//convert data to uint8 and send over tcp socket
uint32_t size = sizeof(student);
std:vector<std::uint8_t> data(size);
std::memcpy(data.data(), reinterpret_cast<void*>(&student),size)
sendDataOverTCPSocket(data);

Appreciate an example on how to do this.

Thank you

Used this https://www.digitalocean.com/community/tutorials/python-socket-programming-server-client socket_server.py code as the server application

Jeffrey · Accepted Answer · 2022-11-15 19:01:30Z

1

You simply cannot do std::memcpy(data.data(), reinterpret_cast<void*>(&student),size)

&student is not a POD class. Specifically, in memory, the string name; member will be a small struct, say 16 bytes, with pointers to the actual content.

Use something like Protobuff or any other stock serialization. This is the only sane way.

answered Nov 15, 2022 at 19:01

Jeffrey

11.1k1 gold badge26 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

jkafernando Over a year ago

how would I read the bytes sent over the tcp socket in python code? appreciate an example

user4581301 Over a year ago

@jkafernando There is no point to reading the bytes sent because you sent the wrong data. All you will get is more confusion. You must fix the sender first. If you don't take Jeffery's advice and use an existing serializer, you'll have to write your own protocol. Sending raw structures rarely works as expected when both sides are written in the same language and when other languages get involved, you get a dog's breakfast. After the dog is done digesting it.

jkafernando Over a year ago

can you provide an example on how to use Protobuff or any other stock serialization.

Jeffrey Over a year ago

developers.google.com/protocol-buffers/docs/tutorials

Collectives™ on Stack Overflow

convert data from tcp socket in python

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related