/
uploader.go
74 lines (69 loc) · 1.75 KB
/
uploader.go
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package uploader
import (
"bytes"
"fmt"
"io"
"mime/multipart"
"net/http"
"net/url"
"os"
"github.com/gustavohmsilva/Praticando-Go/Aula_XIV/client/dataparser"
)
// UplRequestSrc define the necessary data for a file upload http request to be
// created.
type UplRequestSrc struct {
Endpoint string
FileParameter string
Path string
FileName string
Status error
}
// NewUplRequestSrc create a populated UplRequestSrc object
func NewUplRequestSrc(
uri, fileParam, path, fileName string,
) (
UplRequestSrc, error,
) {
if _, err := url.ParseRequestURI(uri); err != nil {
return UplRequestSrc{}, err
}
f, err := dataparser.Read(fmt.Sprintf("%s/%s", path, fileName))
f.Close()
if err != nil {
return UplRequestSrc{}, err
}
if fileParam == "" {
return UplRequestSrc{}, fmt.Errorf("fileParam is mandatory")
}
return UplRequestSrc{uri, fileParam, path, fileName, nil}, nil
}
// NewFileReq creates a http request with the necessary data to upload a file to
// a server over http
func NewFileReq(source UplRequestSrc) (*http.Request, error) {
f, err := os.Open(fmt.Sprintf("%s/%s", source.Path, source.FileName))
if err != nil {
return &http.Request{}, err
}
defer f.Close()
descStruct, err := f.Stat()
if err != nil {
return &http.Request{}, err
}
reqBody := new(bytes.Buffer)
bufferWriter := multipart.NewWriter(reqBody)
formData, err := bufferWriter.CreateFormFile(
source.FileParameter,
descStruct.Name(),
)
if err != nil {
return &http.Request{}, err
}
io.Copy(formData, f)
err = bufferWriter.Close()
if err != nil {
return &http.Request{}, err
}
request, err := http.NewRequest("POST", source.Endpoint, reqBody)
request.Header.Set("Content-Type", bufferWriter.FormDataContentType())
return request, nil
}