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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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61 lines
2.1 KiB
61 lines
2.1 KiB
8 years ago
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Nanopb example "network_server"
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===============================
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This example demonstrates the use of nanopb to communicate over network
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connections. It consists of a server that sends file listings, and of
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a client that requests the file list from the server.
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Example usage
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-------------
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user@host:~/nanopb/examples/network_server$ make # Build the example
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protoc -ofileproto.pb fileproto.proto
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python ../../generator/nanopb_generator.py fileproto.pb
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Writing to fileproto.pb.h and fileproto.pb.c
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cc -ansi -Wall -Werror -I .. -g -O0 -I../.. -o server server.c
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../../pb_decode.c ../../pb_encode.c fileproto.pb.c common.c
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cc -ansi -Wall -Werror -I .. -g -O0 -I../.. -o client client.c
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../../pb_decode.c ../../pb_encode.c fileproto.pb.c common.c
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user@host:~/nanopb/examples/network_server$ ./server & # Start the server on background
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[1] 24462
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petteri@oddish:~/nanopb/examples/network_server$ ./client /bin # Request the server to list /bin
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Got connection.
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Listing directory: /bin
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1327119 bzdiff
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1327126 bzless
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1327147 ps
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1327178 ntfsmove
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1327271 mv
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1327187 mount
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1327259 false
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1327266 tempfile
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1327285 zfgrep
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1327165 gzexe
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1327204 nc.openbsd
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1327260 uname
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Details of implementation
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-------------------------
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fileproto.proto contains the portable Google Protocol Buffers protocol definition.
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It could be used as-is to implement a server or a client in any other language, for
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example Python or Java.
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fileproto.options contains the nanopb-specific options for the protocol file. This
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sets the amount of space allocated for file names when decoding messages.
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common.c/h contains functions that allow nanopb to read and write directly from
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network socket. This way there is no need to allocate a separate buffer to store
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the message.
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server.c contains the code to open a listening socket, to respond to clients and
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to list directory contents.
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client.c contains the code to connect to a server, to send a request and to print
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the response message.
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The code is implemented using the POSIX socket api, but it should be easy enough
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to port into any other socket api, such as lwip.
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