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client.go
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client.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"strings"
)
var (
flag_host = flag.String("h", "", "Set host to upload to")
flag_port = flag.String("p", "", "Set port or interface of remote server to upload to")
flag_addr = flag.String("a", "", "Set whole address of server to upload to")
flag_name = flag.String("f", "", "Specify a different filename to use. If -z, it names the zip archive")
flag_stdin = flag.String("s", "", "Give stdin stream a filename")
flag_remove = flag.String("r", "", "Instruct the server to delete the file with a given ID")
flag_zip = flag.Bool("z", false, "Upload the input file(s) (and stdin) as a single zip file")
flag_inclname = flag.Bool("n", false, "Include filename in returned URL (overrides -e)")
flag_inclext = flag.Bool("e", false, "Append file extension to returned URL")
flag_nocopy = flag.Bool("C", false, "Do not copy link to clipboard")
flag_noprog = flag.Bool("P", false, "Do not show progress bar")
flag_oops = flag.Bool("oops", false, "Delete the last file uploaded")
dotfilePath string
)
func init() {
log.SetFlags(log.Lshortfile)
flag.Usage = func() {
fmt.Fprintln(os.Stderr, `usage: lift [options] [ - | files... ]
Options:`)
flag.PrintDefaults()
fmt.Fprintln(os.Stderr, `Pass '-' as a filename to include stdin as an upload.
Optional parameters specify the connection details to the remote server. -a
sets the entire URL, including scheme (and optional port), and overrides -h and
-p.
If options are specified, they will be saved in the configuration file.
The location of this file is system-dependent:
$HOME/.airlift on POSIX;
%LOCALAPPDATA%\airlift\airlift_config on Windows.`)
os.Exit(1)
}
flag.Parse()
}
func main() {
defer exit(0)
conf, err := loadConfig()
if err != nil {
fatal(err)
}
configured := config(conf)
if flag.NArg() == 0 {
if configured {
return
}
if *flag_oops {
oops(conf)
} else if *flag_remove != "" {
remove(conf, *flag_remove)
} else {
flag.Usage()
}
return
}
uploads := make([]FileUpload, 0, flag.NArg()+1)
for _, arg := range flag.Args() {
if arg == "-" {
tmp, err := ioutil.TempFile("", "airlift-upload")
if err != nil {
fatal("Failed to buffer stdin:", tmp)
}
addTemp(tmp.Name())
defer tmp.Close()
io.Copy(tmp, os.Stdin)
tmp.Close()
// TODO: content sniffing to autogen some name slightly more
// meaningful than "stdin"?
s := FileUpload{"stdin", tmp.Name()}
if *flag_stdin != "" {
s.Name = *flag_stdin
}
uploads = append(uploads, s)
} else {
fi, err := os.Stat(arg)
if err != nil {
fatal(err)
}
if fi.IsDir() {
fmt.Fprintf(os.Stderr, "warn: skipping directory '%s'\n", arg)
continue
}
uploads = append(uploads, FileUpload{filepath.Base(arg), arg})
}
}
if *flag_zip {
uploads = []FileUpload{makeZip(uploads)}
}
// -f will simply rename the first file, whatever it is
if *flag_name != "" {
uploads[0].Name = *flag_name
}
urls := make([]string, 0, len(uploads))
for _, upload := range uploads {
u := postFile(conf, upload)
if u == "" {
return
}
fmt.Println(u)
urls = append(urls, u)
}
if !*flag_nocopy {
str := strings.Join(urls, "\n")
if err := copyString(str); err != nil {
if err != errNotCopying {
fmt.Fprintf(os.Stderr, "(Error copying to clipboard: %v)\n", err)
}
} else {
fmt.Fprintln(os.Stderr, "(Copied to clipboard)")
}
}
}
type Resp struct {
URL string
Err string
}
func (conf *Config) TryRequest(makeReq func() *http.Request, expectCode int) Resp {
if conf.Host == "" {
fmt.Fprintln(os.Stderr, "Host not configured.")
flag.Usage()
}
var alreadyWrong bool
for {
req := makeReq()
if err := conf.PrepareRequest(req); err != nil {
fatal(err)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
fatal(err)
}
if resp.StatusCode != expectCode {
fmt.Fprintln(os.Stderr, resp.Status)
}
var msg Resp
if resp.StatusCode != http.StatusNoContent {
err = json.NewDecoder(resp.Body).Decode(&msg)
resp.Body.Close()
if err != nil {
fatal("Invalid server response:", err)
}
}
switch resp.StatusCode {
case expectCode:
return msg
case http.StatusForbidden:
if alreadyWrong {
fmt.Fprintln(os.Stderr, "Sorry, wrong password.")
} else {
fmt.Fprintln(os.Stderr, "Server returned error:", msg.Err)
fmt.Fprintln(os.Stderr, "You'll need a new password. If the request is successful,")
fmt.Fprintf(os.Stderr, "it will be saved in %s.\n", PasswordStorageMechanism)
alreadyWrong = true
}
fmt.Fprint(os.Stderr, "Password: ")
pass, err := readPassword()
if err != nil {
fatal(err)
}
if err = updatePassword(conf, pass); err != nil {
fatal(err)
}
default:
fatal("Server returned error:", msg.Err)
}
}
}
func requestMaker(req *http.Request) func() *http.Request {
return func() *http.Request {
return req
}
}
func oops(conf *Config) {
req, err := http.NewRequest("POST", conf.BaseURL("/oops"), nil)
if err != nil {
fatal(err)
}
resp := conf.TryRequest(requestMaker(req), http.StatusOK)
u := resp.URL
if u != "" {
fmt.Fprintf(os.Stderr, "Deleted upload at %s://%s.\n", conf.Scheme, u)
}
}
func remove(conf *Config, id string) {
req, err := http.NewRequest("DELETE", conf.BaseURL("/"+id), nil)
if err != nil {
fatal(err)
}
conf.TryRequest(requestMaker(req), http.StatusNoContent)
}
type NotAnError int
func (err NotAnError) Error() string {
return "this is not an error"
}
const (
errPassNotFound NotAnError = iota // password not found for host
errNotCopying // not copying anything on this system (no clipboard)
)
func (c *Config) BaseURL(add string) string {
return c.Scheme + "://" + c.Host + ":" + c.Port + add
}
// attach the password. Only do so if there's a password stored for the given
// host.
func (c *Config) PrepareRequest(req *http.Request) error {
pass, err := getPassword(c)
switch err {
case nil:
req.Header.Set("X-Airlift-Password", pass)
return nil
case errPassNotFound:
return nil
default:
return err
}
}
func loadConfig() (*Config, error) {
buf, err := ioutil.ReadFile(dotfilePath)
if err != nil {
if os.IsNotExist(err) {
conf := &Config{
Scheme: "http",
Port: "80",
}
return conf, writeConfig(conf)
}
return nil, err
}
conf := new(Config)
if err := json.Unmarshal(buf, conf); err != nil {
return nil, fmt.Errorf("Error reading config: %v", err)
}
return conf, nil
}
func writeConfig(conf *Config) error {
dir := filepath.Dir(dotfilePath)
os.MkdirAll(dir, 0755)
file, err := os.OpenFile(dotfilePath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600)
if err != nil {
return err
}
b, err := json.MarshalIndent(conf, "", " ")
if err != nil {
return err
}
file.Write(b)
return nil
}
func config(conf *Config) bool {
configured := false
if *flag_host != "" {
configured = true
conf.Host = *flag_host
}
if *flag_port != "" {
configured = true
conf.Port = *flag_port
}
if *flag_addr != "" {
configured = true
if !strings.Contains(*flag_addr, "://") {
*flag_addr = "http://" + *flag_addr
}
addr, err := url.Parse(*flag_addr)
if err != nil {
fatal("-a:", err)
}
conf.Scheme = addr.Scheme
host, port, err := net.SplitHostPort(addr.Host)
if err == nil {
conf.Host, conf.Port = path.Join(host, addr.Path), port
} else {
conf.Host = path.Join(addr.Host, addr.Path)
}
if conf.Port == "" {
conf.Port = "80"
}
}
if conf.Scheme == "" {
conf.Scheme = "http"
}
if configured {
if err := writeConfig(conf); err != nil {
fatal(err)
}
}
return configured
}
type FileUpload struct {
Name string // this is the name as it will be presented to the server
Path string // this is the path of the file on local disk, which could be anything
}
func postFile(conf *Config, upload FileUpload) string {
msg := conf.TryRequest(func() *http.Request {
file, err := os.Open(upload.Path)
if err != nil {
fatal(err)
}
sz, err := file.Seek(0, os.SEEK_END)
if err != nil {
fatal(err)
}
file.Seek(0, os.SEEK_SET)
var body io.ReadCloser
// only show progress if the size is bigger than some arbitrary amount
// (512KiB) and -P isn't set
if sz > 512*1024 && !*flag_noprog {
r := newProgressReader(file, sz)
//go r.Report()
body = r
} else {
body = file
}
req, err := http.NewRequest("POST", conf.BaseURL("/upload/file"), body)
if err != nil {
fatal(err)
}
req.Header.Set("X-Airlift-Filename", url.QueryEscape(upload.Name))
return req
}, http.StatusCreated)
u := msg.URL
if *flag_inclname {
u = path.Join(u, upload.Name)
} else if *flag_inclext {
u += filepath.Ext(upload.Name)
}
u = conf.Scheme + "://" + u
return u
}