128 lines
2.6 KiB
Go
128 lines
2.6 KiB
Go
/*
|
|
* Copyright (c) 2016 Alex Yatskov <alex@foosoft.net>
|
|
* Author: Alex Yatskov <alex@foosoft.net>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"flag"
|
|
"io"
|
|
"log"
|
|
"net/http"
|
|
"net/url"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/PuerkitoBio/goquery"
|
|
)
|
|
|
|
func scrape(url, css, attr string) (string, error) {
|
|
doc, err := goquery.NewDocument(url)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
sel := doc.Find(css)
|
|
|
|
var res string
|
|
if len(attr) == 0 {
|
|
res = sel.Text()
|
|
} else {
|
|
res, _ = sel.Attr(attr)
|
|
}
|
|
|
|
return strings.TrimSpace(res), nil
|
|
}
|
|
|
|
func download(url string, w io.Writer) error {
|
|
resp, err := http.Get(url)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
io.Copy(w, resp.Body)
|
|
return nil
|
|
}
|
|
|
|
func export(path string, r io.Reader) error {
|
|
out, err := os.Create(path)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer out.Close()
|
|
|
|
io.Copy(out, r)
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
if flag.NArg() < 2 {
|
|
flag.Usage()
|
|
os.Exit(2)
|
|
}
|
|
|
|
var (
|
|
attr = flag.String("attr", "", "attrerty to query")
|
|
rawBase = flag.Arg(1)
|
|
css = flag.Arg(2)
|
|
)
|
|
|
|
base, err := url.Parse(rawBase)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
resRaw, err := scrape(rawBase, css, *attr)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
log.Print(resRaw)
|
|
|
|
res, err := url.Parse(resRaw)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
if !res.IsAbs() {
|
|
res = res.ResolveReference(base)
|
|
}
|
|
|
|
var buff bytes.Buffer
|
|
if err := download(res.String(), &buff); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
var path string
|
|
if flag.NArg() > 2 {
|
|
path = flag.Arg(3)
|
|
} else {
|
|
path = filepath.Base(res.Path)
|
|
}
|
|
|
|
if err := export(path, &buff); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|