/
httpfileclient.go
191 lines (169 loc) · 4.08 KB
/
httpfileclient.go
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// Copyright 2017 Blurt. All rights reserved.
// Use of this source code is governed by a Apache
// license 2.0 that can be found in the LICENSE file.
//
// a http file client for handling files
package main
import (
"bytes"
"errors"
"flag"
"fmt"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"os"
"path"
)
func postFile(filename, fileDir, targetUrl string) (string, error) {
bodyBuf := &bytes.Buffer{}
bodyWriter := multipart.NewWriter(bodyBuf)
//关键的一步操作
fileWriter, err := bodyWriter.CreateFormFile("uploadfile", filename)
if err != nil {
return "false", err
}
//打开文件句柄操作
realFile := path.Join(fileDir, filename)
fh, err := os.Open(realFile)
if err != nil {
return "false", err
}
defer fh.Close()
//ioCopy
_, err = io.Copy(fileWriter, fh)
if err != nil {
return "false", err
}
contentType := bodyWriter.FormDataContentType()
bodyWriter.Close()
resp, err := http.Post(targetUrl, contentType, bodyBuf)
if err != nil {
return "false", err
}
defer resp.Body.Close()
resp_body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "false", err
}
if resp.StatusCode != 200 {
return "false", err
} else {
return string(resp_body), nil
}
}
func queryFileTransferProgress(filename string, queryUrl string) (string, error) {
resp, err := http.Get(queryUrl + "?filename=" + filename)
if err != nil {
return "false", err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "false", err
}
if resp.StatusCode != 200 {
return fmt.Sprint("http status code:", resp.StatusCode), nil
} else {
return string(body), nil
}
}
func downloadFile(filename, fileDir, targetUrl string) (string, error) {
resp, err := http.Get(targetUrl + "?filename=" + filename)
if err != nil {
return "false", err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return "false", err
} else {
realFile := path.Join(fileDir, filename)
f, err := os.OpenFile(realFile, os.O_RDWR|os.O_CREATE, 0666)
if err != nil {
return "false", err
}
defer f.Close()
io.Copy(f, resp.Body)
return "true", nil
}
}
func getFileList(targetUrl string) (body []byte, err error) {
resp, err := http.Get(targetUrl)
if err != nil {
return
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
err = errors.New("http status code not 200")
return
} else {
body, err = ioutil.ReadAll(resp.Body)
if err != nil {
return
} else {
return
}
}
}
// sample usage
func main() {
uploadFilename := flag.String("u", "", "upload file to server")
downloadFilename := flag.String("d", "", "download file from server")
queryFilename := flag.String("q", "", "result of file transfer")
fileDir := flag.String("dir", "", "dir of file")
serverIP := flag.String("h", "", "refer server ip")
listFlag := flag.Bool("l", false, "list all files on server")
flag.Usage = usage
flag.Parse()
if *serverIP == "" {
fmt.Println("missing server ip")
flag.Usage()
return
}
upload_url := "http://" + *serverIP + ":12345/upload"
query_url := "http://" + *serverIP + ":12345/query"
download_url := "http://" + *serverIP + ":12345/download"
list_url := "http://" + *serverIP + ":12345/list"
if *uploadFilename != "" {
result, err := postFile(*uploadFilename, *fileDir, upload_url)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(result)
}
return
} else if *downloadFilename != "" {
result, err := downloadFile(*downloadFilename, *fileDir, download_url)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(result)
}
return
} else if *queryFilename != "" {
result, err := queryFileTransferProgress(*queryFilename, query_url)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(result)
}
return
} else if *listFlag {
fileList, err := getFileList(list_url)
if err != nil {
fmt.Println(err)
} else {
fmt.Println(string(fileList))
}
} else {
flag.Usage()
}
}
func usage() {
fmt.Fprintf(os.Stderr, `httpfileclient version: httpfileclient/3.0
Usage: ./httpfileclient [-h server] [-u filename] [-d filename] [-q filename] [-dir filepath] [-l]
Options:
`)
flag.PrintDefaults()
}