/
main.go
124 lines (105 loc) · 2.66 KB
/
main.go
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package main
import (
"bytes"
"fmt"
"io"
"mime/multipart"
"net/http/httptest"
"os"
"strings"
"github.com/gocarina/gocsv"
"github.com/labstack/echo/v4"
)
type Client struct { // Our example struct, you can use "-" to ignore a field
Id string `csv:"client_id"`
Name string `csv:"client_name"`
Age string `csv:"client_age"`
NotUsed string `csv:"-"`
}
const (
fileName = "clients.csv"
)
func main() {
if err := local(); err != nil {
panic(err)
}
if err := bin([]Client{
{Id: "1", Name: "hoge", Age: "12"},
{Id: "2", Name: "\"f,uga\"", Age: "22"},
{Id: "3", Name: "foo", Age: "32"},
{Id: "4", Name: "bar", Age: "42"},
}); err != nil {
panic(err)
}
}
func bin(list []Client) error {
lines := []string{"client_id,client_name,client_age"}
for _, v := range list {
lines = append(lines, fmt.Sprintf(
"%s,%s,%s",
v.Id,
v.Name,
v.Age,
))
}
body := []byte(strings.Join(lines, "\n"))
file, err := createFile(fileName, []byte(body))
if err != nil {
return err
}
clients := []*Client{}
clientsFile, err := file.Open()
if err != nil {
return fmt.Errorf("miss open file. file_name: %s", fileName)
}
defer clientsFile.Close()
gocsv.SetCSVReader(func(in io.Reader) gocsv.CSVReader {
return gocsv.LazyCSVReader(in)
})
if err := gocsv.Unmarshal(clientsFile, &clients); err != nil {
return fmt.Errorf("miss unmarshal file. err: %w", err)
}
fmt.Println("output bin file")
for _, client := range clients {
fmt.Printf("val: %+v\n", client)
}
return nil
}
func local() error {
clientsFile, err := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE, os.ModePerm)
if err != nil {
return fmt.Errorf("miss open file. file_name: %s", fileName)
}
defer clientsFile.Close()
clients := []*Client{}
gocsv.SetCSVReader(func(in io.Reader) gocsv.CSVReader {
return gocsv.LazyCSVReader(in)
})
if err := gocsv.UnmarshalFile(clientsFile, &clients); err != nil {
return fmt.Errorf("miss unmarshal file. err: %w", err)
}
fmt.Println("output local file")
for _, client := range clients {
fmt.Printf("val: %+v\n", client)
}
return nil
}
func createFile(name string, body []byte) (*multipart.FileHeader, error) {
buf := new(bytes.Buffer)
mr := multipart.NewWriter(buf)
w, err := mr.CreateFormFile("file", name)
if err != nil {
return nil, fmt.Errorf("miss create form file. err: %w", err)
}
w.Write(body)
mr.Close()
req := httptest.NewRequest(echo.POST, "/", buf)
req.Header.Set(echo.HeaderContentType, mr.FormDataContentType())
rec := httptest.NewRecorder()
c := echo.New().NewContext(req, rec)
file, err := c.FormFile("file")
if err != nil {
return nil, fmt.Errorf("miss convert form file. err: %w", err)
}
return file, nil
}