example for protobuf, go, and the repeated protobuf entry

bdr_proto.proto

package bdr_proto;

message request {
	message blob {
		required string hash = 1; // the sha256 checksum of the blob
		required int32  size = 2; // the size of the blob 
	}
	repeated blob blobs = 1;
}

test.go

package main

import (
    "./bdr_proto"
    "crypto/sha256"
    "fmt"
)

import M "math/rand"
import C "crypto/rand"

func main() {
    req := &blob_proto.Request{}
    for i = 0; i < 32; i++ {
        // read in 16 bytes from /dev/urandom to sha256
        randBytes = make([]byte, 16)
        C.Read(randBytes)

        // get its size
        size := int32(len(randBytes))

        // create a new hash, and do a crypty hash of the random bytes.
        sha := sha256.New()
        sha.Write(randBytes)
        hash := fmt.Sprintf("%x", hash.Sum(nil))

        req.Blobs = append(req.Blobs, &blob_proto.RequestBlob{
            Hash: &hash,
            Size: &size,
        }
    }
}