类型定义
Protobuf
首先让我们看一个简单的例子
syntax = "proto3";
message SearchRequest {
string query = 1;
int32 page_number = 2;
int32 result_per_page = 3;
}
第一行指定SearchRequest，它包含三个字段query、page_number、result_per_page
字段是以[ "repeated" ] type fieldName "=" fieldNumber [ "[" fieldOptions "]" ] ";"格式定义的。这个例子是一个简单的例子，采用了type fieldName "=" fieldNumber格式定义的。
比如第一个字段querystring，其次是字段的名称，然后是等号=repeated
syntax = "proto3";
package fromatob;
// FromAtoB is a simplified version of fromAtoB’s backend API.
service FromAtoB {
rpc Lookup(LookupRequest) returns (Coordinate) {}
}
// A LookupRequest is a request to look up the coordinates for a city by name.
message LookupRequest {
string name = 1;
}
// A Coordinate identifies a location on Earth by latitude and longitude.
message Coordinate {
// Latitude is the degrees latitude of the location, in the range [-90, 90].
double latitude = 1;
// Longitude is the degrees longitude of the location, in the range [-180, 180].
double longitude = 2;
}