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Use RPC to implement file upload: Create an RPC server to handle file upload requests, created using the net/rpc package. Create an RPC client to initiate file upload requests to the server, created using the net/rpc package, serialize the file and send it via an RPC call.
How to use RPC to implement file upload in Go
Remote Procedure Call (RPC) is a method in distributed systems The mechanism for achieving communication. It allows clients to call a function located on a different machine as if it were a local function. This article will introduce how to use RPC in Go to implement file upload.
Create RPC Server
First, we need to create the RPC server that will handle file upload requests from clients. A simple RPC server can be created using the net/rpc
package:
// 建立一个 RPC 服务 type FileUploadServer struct {} // 注册 FileUploadServer 服务 func RegisterFileUploadServer(s *rpc.Server) { s.Register(new(FileUploadServer)) } // 定义 UploadFile 方法 func (s *FileUploadServer) UploadFile(file *File, reply *FileResponse) error { // TODO: 实际的文件上传逻辑 }
Create RPC client
Next, we create the RPC client , it will initiate a file upload request to the server:
// 导入所需包 import ( "net/rpc" "os" ) // 定义 FileUploadClient 客户端 type FileUploadClient struct { conn *rpc.Client path string file *os.File } // 创建 FileUploadClient 客户端 func NewFileUploadClient(path string) (*FileUploadClient, error) { // 连接到 RPC 服务器 conn, err := rpc.Dial("tcp", "localhost:8080") // 返回 FileUploadClient 客户端 return &FileUploadClient{ conn: conn, path: path, }, err } // 上传文件 func (c *FileUploadClient) UploadFile() error { // 打开文件 file, err := os.Open(c.path) // 序列化文件并通过 RPC 调用发送 return c.conn.Call("FileUploadServer.UploadFile", &File{Data: file}, &FileResponse{}) }
Practical case
The following is a practical case showing how to use Golang RPC to implement file upload:
// 服务端代码 package main import ( "net" "net/rpc" os" ) type FileUploadServer struct {} func RegisterFileUploadServer(s *rpc.Server) { s.Register(new(FileUploadServer)) } func (s *FileUploadServer) UploadFile(file *File, reply *FileResponse) error { // 将文件保存到本地 f, err := os.Create("./" + file.Name) if err != nil { return err } _, err = f.Write(file.Data) return err } func main() { // 创建 RPC 服务器并注册服务 rpc.RegisterName("FileUploadServer", new(FileUploadServer)) // 监听指定端口 listener, err := net.Listen("tcp", ":8080") if err != nil { log.Fatal(err) } // 接受 RPC 连接并处理请求 rpc.Accept(listener) } // 客户端代码 package main import ( "log" "net/rpc" "os" ) type File struct { Name string Data []byte } type FileResponse struct {} func main() { // 创建 RPC 客户端 client, err := rpc.Dial("tcp", "localhost:8080") if err != nil { log.Fatal(err) } // 打开要上传的文件 file, err := os.Open("./test.txt") if err != nil { log.Fatal(err) } // 序列化文件并通过 RPC 调用发送 if err = client.Call("FileUploadServer.UploadFile", &File{Name: "test.txt", Data: file}, &FileResponse{}); err != nil { log.Fatal(err) } log.Println("文件上传成功") }
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