mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-30 16:46:27 +00:00
46 lines
2.0 KiB
Go
46 lines
2.0 KiB
Go
// Copyright 2016 Michal Witkowski. All Rights Reserved.
|
|
// See LICENSE for licensing terms.
|
|
|
|
/*
|
|
`grpc_validator` is a generic request contents validator server-side middleware for gRPC.
|
|
|
|
Request Validator Middleware
|
|
|
|
Validating input is important, and hard. It also causes a lot of boilerplate code. This middleware
|
|
checks for the existence of a `Validate` method on each of the messages of a gRPC request. This
|
|
includes the single request of the `Unary` calls, as well as each message of the inbound Stream calls.
|
|
In case of a validation failure, an `InvalidArgument` gRPC status is returned, along with a
|
|
description of the validation failure.
|
|
|
|
While it is generic, it was intended to be used with https://github.com/mwitkow/go-proto-validators,
|
|
a Go protocol buffers codegen plugin that creates the `Validate` methods (including nested messages)
|
|
based on declarative options in the `.proto` files themselves. For example:
|
|
|
|
|
|
syntax = "proto3";
|
|
package validator.examples;
|
|
import "github.com/mwitkow/go-proto-validators/validator.proto";
|
|
|
|
message InnerMessage {
|
|
// some_integer can only be in range (1, 100).
|
|
int32 some_integer = 1 [(validator.field) = {int_gt: 0, int_lt: 100}];
|
|
// some_float can only be in range (0;1).
|
|
double some_float = 2 [(validator.field) = {float_gte: 0, float_lte: 1}];
|
|
}
|
|
|
|
message OuterMessage {
|
|
// important_string must be a lowercase alpha-numeric of 5 to 30 characters (RE2 syntax).
|
|
string important_string = 1 [(validator.field) = {regex: "^[a-z]{2,5}$"}];
|
|
// proto3 doesn't have `required`, the `msg_exist` enforces presence of InnerMessage.
|
|
InnerMessage inner = 2 [(validator.field) = {msg_exists : true}];
|
|
}
|
|
|
|
The `OuterMessage.Validate` would include validation of regexes, existence of the InnerMessage and
|
|
the range values within it. The `grpc_validator` middleware would then automatically use that to
|
|
check all messages processed by the server.
|
|
|
|
Please consult https://github.com/mwitkow/go-proto-validators for details on `protoc` invocation and
|
|
other parameters of customization.
|
|
*/
|
|
package grpc_validator
|