So I'm using gRPC to store data in a key-value store.
The protos look like this:
syntax = "proto3";
package keyvaluestore;
service KeyValueStore {
rpc AddUser(Credentials) returns (Response) {}
rpc Get(Request) returns (Response) {}
rpc Put(Request) returns (Response) {}
rpc Cput(Request) returns (Response) {}
rpc Delete(Request) returns (Response) {}
}
message Credentials {
string user = 1;
string passwd = 2;
}
message Request {
string user = 1;
string key = 2;
bytes val = 3;
bytes val2 = 4;
string addr = 5;
}
message Response {
bytes val = 1;
uint32 nbytes = 2;
string message = 3;
}
Right now, the issue is that if we send over say, an image as byte data
which can include the null byte, then when the server receives it in the
`Request` object, it treats it as a string; when it does this it only reads
it up the the first null byte.
How we pack the `Request` object on the client side:
bool KeyValueStoreClient::Put(const string& user, const string& key,
const char* val) {
Request req;
req.set_user(user);
req.set_key(key);
req.set_val(val);
ClientContext ctx;
Response res;
Status status = stub_->Put(&ctx, req, &res);
}
Server receives `req->val()` as a string instead of `char*`:
Status KeyValueStoreServiceImpl::Put(ServerContext* ctx, const Request*
req, Response* res) {
// req->val() is a string
}
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