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You're reading from  Protocol Buffers Handbook

Product typeBook
Published inApr 2024
PublisherPackt
ISBN-139781805124672
Edition1st Edition
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Author (1)
Clément Jean
Clément Jean
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Clément Jean

Clément Jean is the CTO of Education for Ethiopia, a start-up focusing on educating K-12 students in Ethiopia. On top of that, he is also an online instructor (on Udemy, Linux Foundation, and others) teaching people about diff erent kinds of technologies. In both his occupations, he deals with technologies such as Protobuf and gRPC and how to apply them to real-life use cases. His overall goal is to empower people through education and technology.
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Challenge solutions

Challenge 1 – Descriptors

In this challenge, we need to use the --descriptor_set_out flag to generate binary out of our schema. Let us define a simple schema (name.proto):

syntax = "proto3";
message Name {
  string name = 1;
}

To generate a FileDescriptorSet out of it, we need to run the following command:

$ protoc --descriptor_set_out=name.desc name.proto

This will create a name.desc file that we can then analyze.

Now, the second step is to use --decode to set the internals of the FileDescriptorSet. To do that, assuming that you have the descriptor.proto file in /usr/local/include/google/protobuf, you can run the following:

$ cat name.desc | protoc -I/usr/local/include/google/protobuf --decode=google.protobuf.FileDescriptorSet /usr/local/include/google/protobuf/descriptor.proto

This should output something like this:

file {
  name: "name.proto"
  message_type {
   &...
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Protocol Buffers Handbook
Published in: Apr 2024Publisher: PacktISBN-13: 9781805124672

Author (1)

author image
Clément Jean

Clément Jean is the CTO of Education for Ethiopia, a start-up focusing on educating K-12 students in Ethiopia. On top of that, he is also an online instructor (on Udemy, Linux Foundation, and others) teaching people about diff erent kinds of technologies. In both his occupations, he deals with technologies such as Protobuf and gRPC and how to apply them to real-life use cases. His overall goal is to empower people through education and technology.
Read more about Clément Jean