實做一個可以寄信的 gRPC Proto 寫一個寄發信件服務所需要的資料格式 Proto 是一個文件用來儲存 gRPC server 與 client 交換資料時鎖需要的資料格式,建議可以看看它與 JSON 的對照表來迅速了解需要怎樣寫 syntax = "proto3"; // use proto version 3 package pb; // package name /* Add the Send function for use / service Mail{ rpc Send (MailRequest) returns (MailStatus) {} } / Declare what data you need to let server know and server will use it to send a mail / message MailRequest{ string from = 1; repeated string to = 2; repeated string cc = 3; string subject = 4; string body = 5; string type = 6; } / Means what the mail status be send or not */ message MailStatus{ int32 status = 1; string code = 2; } 產生 golang 的程式 go get -u github.