It's not really just a sequence; it's a hierarchy, isn't it?  Why can't I 
use --decode <root> or something like that?


On Saturday, December 9, 2017 at 4:20:15 PM UTC-8, Ilia Mirkin wrote:
>
> On Sat, Dec 9, 2017 at 5:52 PM, Jim Baldwin <[email protected] 
> <javascript:>> wrote: 
> > I have a protobuf file, and a .proto file that describes the schema. 
> > 
> > The .proto describes dozens of different messages that may be in the 
> > protobuf file. 
> > 
> > I would like to know what messages can be found in the file.  I do a 
> protoc 
> > --decode_raw and get something out, but I don't see how to use that to 
> > figure out how to extract messages from the file. 
> > 
> > I assume there's something I don't get about protobufs, but it seems to 
> me I 
> > should be able to take a protobuf data file and corresponding .proto and 
> > turn it into a file that lets me see what the message hierarchy is in 
> the 
> > file.  JSON would be a great way to do that. 
> > 
> > What am I missing? 
>
> An encoded protobuf is just a sequence of (tag, value) pairs. If you 
> don't know which proto it is, decode_raw is the best you can do. If 
> you do know which proto it is, you can use --decode instead and pass 
> it a proto name to use for the decoding. 
>
> Cheers, 
>
>   -ilia 
>

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