Release v0.0.2

Added timeout option for checking method
Improved usage messages

Stable now

option.go

@@ -4,7 +4,6 @@ import (
     "bytes"
     "fmt"
     "os"
-    "reflect"
 
     "github.com/jessevdk/go-flags"
     "github.com/pkg/errors"
@@ -16,6 +15,7 @@ type Options struct {
     Version bool   `short:"v" long:"version" description:"display the version of pget and exit"`
     Procs   int    `short:"p" long:"procs" description:"split ratio to download file"`
     Output  string `short:"o" long:"output" description:"output file to FILENAME"`
+    Timeout int    `long:"timeout" description:"timeout of checking request in seconds"`
     Trace   bool   `long:"trace" description:"display detail error messages"`
     // File    string `long:"file" description:"urls has same hash in a file to download"`
 }
@@ -35,26 +35,17 @@ func (opts *Options) parse(argv []string) ([]string, error) {
 func (opts Options) usage() []byte {
     buf := bytes.Buffer{}
 
-    fmt.Fprintf(&buf, "Pget "+version+", a parallel file download client\n"+
+    fmt.Fprintf(&buf, msg+
         `Usage: pget [options] URL
 
 Options:
+  -h,  --help                   print usage and exit
+  -v,  --version                display the version of pget and exit
+  -p,  --procs <num>            split ratio to download file
+  -o,  --output <filename>      output file to FILENAME
+  --timeout <seconds>           timeout of checking request in seconds
+  --trace                       display detail error messages
 `)
 
-    var description string
-    t := reflect.TypeOf(opts)
-
-    for i := 0; i < t.NumField(); i++ {
-        tag := t.Field(i).Tag
-
-        if sh := tag.Get("short"); sh != "" {
-            description = fmt.Sprintf("-%s,  --%s", sh, tag.Get("long"))
-        } else {
-            description = fmt.Sprintf("--%s", tag.Get("long"))
-        }
-
-        fmt.Fprintf(&buf, "  %-20s %s\n", description, tag.Get("description"))
-    }
-
     return buf.Bytes()
 }

pget.go

@@ -2,23 +2,26 @@ package pget
 
 import (
 	"fmt"
-	"net/url"
 	"os"
 	"runtime"
 
 	"github.com/asaskevich/govalidator"
 	"github.com/pkg/errors"
 )
 
-const version = "0.0.1"
+const (
+	version = "0.0.2"
+	msg     = "Pget v" + version + ", parallel file download client\n"
+)
 
 // Pget structs
 type Pget struct {
 	Trace bool
-	procs int
-	args  []string
-	url   string
 	Utils
+	procs   int
+	args    []string
+	url     string
+	timeout int
 }
 
 type ignore struct {
@@ -32,8 +35,10 @@ type cause interface {
 // New for pget package
 func New() *Pget {
 	return &Pget{
-		Trace: false,
-		Utils: &Data{},
+		Trace:   false,
+		Utils:   &Data{},
+		procs:   2, // default
+		timeout: 10,
 	}
 }
 
@@ -84,12 +89,14 @@ func (pget *Pget) ready() error {
 		pget.Trace = opts.Trace
 	}
 
-	if opts.Procs <= 0 {
-		pget.procs = 2 // default
-	} else {
+	if opts.Procs > 2 {
 		pget.procs = opts.Procs
 	}
 
+	if opts.Timeout > 0 {
+		pget.timeout = opts.Timeout
+	}
+
 	if err := pget.parseURLs(); err != nil {
 		return errors.Wrap(err, "failed to parse of url")
 	}
@@ -144,7 +151,7 @@ func (pget *Pget) parseOptions(opts *Options, argv []string) error {
 	}
 
 	if opts.Version {
-		os.Stdout.Write([]byte("Pget " + version + ", a parallel file download client\n"))
+		os.Stdout.Write([]byte(msg))
 		return pget.makeIgnoreErr()
 	}
 
@@ -167,11 +174,5 @@ func (pget *Pget) parseURLs() error {
 		return errors.New("url has not been set in argument")
 	}
 
-	u, err := url.Parse(pget.url)
-	if err != nil {
-		return errors.Wrap(err, "failed to url parse")
-	}
-	pget.url = u.String()
-
 	return nil
 }

requests.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"time"
 
 	"github.com/pkg/errors"
 	"golang.org/x/net/context"
@@ -28,7 +29,10 @@ func (p *Pget) Checking() error {
 	url := p.url
 
 	// checking
-	res, err := http.Get(url)
+	client := http.Client{
+		Timeout: time.Duration(p.timeout) * time.Second,
+	}
+	res, err := client.Get(url)
 	if err != nil {
 		return errors.Wrap(err, "failed to head request: "+url)
 	}
@@ -38,8 +42,8 @@ func (p *Pget) Checking() error {
 		return errors.Errorf("not supported range access: %s", url)
 	}
 
-	// To perform to the correct "range access"
-	// get of the last url in the redirect
+	// To perform with the correct "range access"
+	// get the last url in the redirect
 	_url := res.Request.URL.String()
 	if p.isNotLastURL(_url) {
 		p.url = _url