Re: [protobuf] How to send classes defined in proto over a socket
Wait.
On Fri, Mar 12, 2010 at 9:29 AM, mk wrote:
> Hi,
>
> I am trying to send a proto over a socket, but i am getting
> segmentation error. Could someone please help and tell me what is
> wrong with this?
>
> file.proto
> message data{
>required string x1 = 1;
>required uint32 x2 = 2;
>required float x3 = 3;
> }
>
> client.cpp
> ...
>// class defined in proto
>data data_snd;
>data data_rec;
>
>char *y1 = "operation1";
>uint32_t y2 = 123 ;
>float y3 = 3.14;
>
>// assigning data to send()
>data_snd.set_x1(y1);
>data_snd.set_x2(y2);
>data_snd.set_x3(y3);
>
>//sending data to the server
>if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) {
>
You can't do that.
You have to use one of the Serialize methods.
> cerr << "send() failed" ;
> exit(1);
> }
>
> //receiving data from the client
> if (recv(socket, &data_rcv, sizeof(data_rcv), 0) < 0) {
>cerr << "recv() failed";
>exit(1);
> }
>
> //printing received data
> cout << data_rec.x1() << "\n";
> cout << data_rec.x2() << "\n";
> cout << data_rec.x3() << "\n";
> ...
>
> server.cpp
> ...
>
> //receiving data from the client
> if (recv(socket, &data_rcv, sizeof(data_rcv), 0) < 0) {
>cerr << "recv() failed";
>exit(1);
> }
>
> //printing received data
> cout << data_rec.x1() << "\n";
> cout << data_rec.x2() << "\n";
> cout << data_rec.x3() << "\n";
>
> // assigning data to send()
>data_snd.set_x1(data_rec.x1());
>data_snd.set_x2(data_rec.x2());
>data_snd.set_x3(data_rec.x3());
>
>//sending data to the server
>if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
> ...
>
> Thanks for help and replies-
>
> --
> You received this message because you are subscribed to the Google Groups
> "Protocol Buffers" group.
> To post to this group, send email to proto...@googlegroups.com.
> To unsubscribe from this group, send email to
> protobuf+unsubscr...@googlegroups.com
> .
> For more options, visit this group at
> http://groups.google.com/group/protobuf?hl=en.
>
>
--
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To post to this group, send email to proto...@googlegroups.com.
To unsubscribe from this group, send email to
protobuf+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/protobuf?hl=en.
Re: [protobuf] How to send classes defined in proto over a socket
You're trying to send the raw C++ memory representation of a protocol object
send(socket, &data_snd, sizeof(data_snd), 0)
That doesn't work. And is the reason why protocol buffers are there in
the first place: they provide serialization techniques.
You need to use the serialization methods that SerializeToStream or
SerializeToString that generate a platform independent string
serialization from the content of the protocol buffer. On the other
side deserialize with ParseFromString/ParseFromStream
http://code.google.com/apis/protocolbuffers/docs/overview.html
-h
On Fri, Mar 12, 2010 at 09:29, mk wrote:
> Hi,
>
> I am trying to send a proto over a socket, but i am getting
> segmentation error. Could someone please help and tell me what is
> wrong with this?
>
> file.proto
> message data{
> required string x1 = 1;
> required uint32 x2 = 2;
> required float x3 = 3;
> }
>
> client.cpp
> ...
> // class defined in proto
> data data_snd;
> data data_rec;
>
> char *y1 = "operation1";
> uint32_t y2 = 123 ;
> float y3 = 3.14;
>
> // assigning data to send()
> data_snd.set_x1(y1);
> data_snd.set_x2(y2);
> data_snd.set_x3(y3);
>
> //sending data to the server
> if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
>
> //receiving data from the client
> if (recv(socket, &data_rcv, sizeof(data_rcv), 0) < 0) {
> cerr << "recv() failed";
> exit(1);
> }
>
> //printing received data
> cout << data_rec.x1() << "\n";
> cout << data_rec.x2() << "\n";
> cout << data_rec.x3() << "\n";
> ...
>
> server.cpp
> ...
>
> //receiving data from the client
> if (recv(socket, &data_rcv, sizeof(data_rcv), 0) < 0) {
> cerr << "recv() failed";
> exit(1);
> }
>
> //printing received data
> cout << data_rec.x1() << "\n";
> cout << data_rec.x2() << "\n";
> cout << data_rec.x3() << "\n";
>
> // assigning data to send()
> data_snd.set_x1(data_rec.x1());
> data_snd.set_x2(data_rec.x2());
> data_snd.set_x3(data_rec.x3());
>
> //sending data to the server
> if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
> ...
>
> Thanks for help and replies-
>
> --
> You received this message because you are subscribed to the Google Groups
> "Protocol Buffers" group.
> To post to this group, send email to proto...@googlegroups.com.
> To unsubscribe from this group, send email to
> protobuf+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/protobuf?hl=en.
>
>
--
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To post to this group, send email to proto...@googlegroups.com.
To unsubscribe from this group, send email to
protobuf+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/protobuf?hl=en.
Re: [protobuf] How to send classes defined in proto over a socket
On what line do you get the error?
On Fri, Mar 12, 2010 at 9:29 AM, mk wrote:
> Hi,
>
> I am trying to send a proto over a socket, but i am getting
> segmentation error. Could someone please help and tell me what is
> wrong with this?
>
> file.proto
> message data{
>required string x1 = 1;
>required uint32 x2 = 2;
>required float x3 = 3;
> }
>
> client.cpp
> ...
>// class defined in proto
>data data_snd;
>data data_rec;
>
>char *y1 = "operation1";
>uint32_t y2 = 123 ;
>float y3 = 3.14;
>
>// assigning data to send()
>data_snd.set_x1(y1);
>data_snd.set_x2(y2);
>data_snd.set_x3(y3);
>
>//sending data to the server
>if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
>
> //receiving data from the client
> if (recv(socket, &data_rcv, sizeof(data_rcv), 0) < 0) {
>cerr << "recv() failed";
>exit(1);
> }
>
> //printing received data
> cout << data_rec.x1() << "\n";
> cout << data_rec.x2() << "\n";
> cout << data_rec.x3() << "\n";
> ...
>
> server.cpp
> ...
>
> //receiving data from the client
> if (recv(socket, &data_rcv, sizeof(data_rcv), 0) < 0) {
>cerr << "recv() failed";
>exit(1);
> }
>
> //printing received data
> cout << data_rec.x1() << "\n";
> cout << data_rec.x2() << "\n";
> cout << data_rec.x3() << "\n";
>
> // assigning data to send()
>data_snd.set_x1(data_rec.x1());
>data_snd.set_x2(data_rec.x2());
>data_snd.set_x3(data_rec.x3());
>
>//sending data to the server
>if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
> ...
>
> Thanks for help and replies-
>
> --
> You received this message because you are subscribed to the Google Groups
> "Protocol Buffers" group.
> To post to this group, send email to proto...@googlegroups.com.
> To unsubscribe from this group, send email to
> protobuf+unsubscr...@googlegroups.com
> .
> For more options, visit this group at
> http://groups.google.com/group/protobuf?hl=en.
>
>
--
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To post to this group, send email to proto...@googlegroups.com.
To unsubscribe from this group, send email to
protobuf+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/protobuf?hl=en.
