/
client.go
109 lines (94 loc) · 2.21 KB
/
client.go
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package main
import (
"context"
"fmt"
"io"
"os"
"path/filepath"
"github.com/11090815/hyperchain/protos-go/test/proto"
"google.golang.org/grpc"
)
type Client struct {
greeterClient proto.GreeterClient
downloaderClient proto.DownloaderClient
}
func NewClient(address string) (*Client, error) {
conn, err := grpc.Dial(address, grpc.WithInsecure())
if err != nil {
return nil, err
}
greeterClient := proto.NewGreeterClient(conn)
downloaderClient := proto.NewDownloaderClient(conn)
return &Client{greeterClient: greeterClient, downloaderClient: downloaderClient}, nil
}
func (c *Client) SayHello() error {
resp, err := c.greeterClient.SayHello(context.Background(), &proto.HelloRequest{Name: "Tom"})
if err != nil {
return err
}
fmt.Printf("Greet to server successfully, response from server: [%s]\n", resp.Payload)
return nil
}
func (c *Client) Download() error {
stream, err := c.downloaderClient.Download(context.Background(), &proto.DownloadRequest{Suffix: ".jpg"})
if err != nil {
return err
}
hasReceived := make(map[string]*os.File)
path := filepath.Join("download")
_, err = os.Stat(path)
if err != nil && os.IsNotExist(err) {
fmt.Println(2222, path)
if err = os.Mkdir(path, os.FileMode(0755)); err != nil {
return err
}
}
entries, err := os.ReadDir(path)
if err != nil {
return err
}
for _, entry := range entries {
os.RemoveAll(filepath.Join(path, entry.Name()))
}
for {
resp, err := stream.Recv()
if err == io.EOF {
break
}
if err != nil {
return err
}
if file, ok := hasReceived[resp.Name]; !ok {
newFile, err := os.Create(filepath.Join(path, resp.Name))
if err != nil {
return err
}
defer newFile.Close()
if _, err = newFile.Write(resp.Payload); err != nil {
return err
}
hasReceived[resp.Name] = newFile
} else {
if len(resp.Payload) == 0 {
fmt.Printf("Download [%s] completed.\n", resp.Name)
} else {
if _, err = file.Write(resp.Payload); err != nil {
return err
}
}
}
}
return nil
}
func main() {
client, err := NewClient("192.168.189.128:8080")
if err != nil {
panic(err)
}
if err = client.SayHello(); err != nil {
panic(err)
}
if err = client.Download(); err != nil {
panic(err)
}
}