Making this be more modular
This commit is contained in:
parent
6ae001c044
commit
d0cf3364ef
12
scrape.go
12
scrape.go
@ -22,17 +22,5 @@
|
||||
|
||||
package main
|
||||
|
||||
import "log"
|
||||
|
||||
func main() {
|
||||
err := scrapeTabelog(
|
||||
"http://tabelog.com/en/kanagawa/rstLst/1/",
|
||||
"data/tabelog.json",
|
||||
"cache/webcache",
|
||||
"cache/geocache.json",
|
||||
)
|
||||
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
145
scraper.go
Normal file
145
scraper.go
Normal file
@ -0,0 +1,145 @@
|
||||
/*
|
||||
* Copyright (c) 2015 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 (
|
||||
"log"
|
||||
"net/url"
|
||||
"sync"
|
||||
|
||||
"github.com/PuerkitoBio/goquery"
|
||||
)
|
||||
|
||||
type review struct {
|
||||
name string
|
||||
address string
|
||||
url string
|
||||
|
||||
features map[string]float64
|
||||
|
||||
latitude float64
|
||||
longitude float64
|
||||
}
|
||||
|
||||
type profiler interface {
|
||||
index(doc *goquery.Document) (string, []string)
|
||||
profile(doc *goquery.Document) review
|
||||
}
|
||||
|
||||
func makeAbsUrl(base, ref string) (string, error) {
|
||||
b, err := url.Parse(base)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
r, err := url.Parse(ref)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return b.ResolveReference(r).String(), nil
|
||||
}
|
||||
|
||||
func decodeReviews(in chan review, out chan review, cache *geoCache) {
|
||||
for {
|
||||
if r, ok := <-in; ok {
|
||||
pos, err := cache.decode(r.address)
|
||||
if err == nil {
|
||||
r.latitude = pos.Latitude
|
||||
r.longitude = pos.Longitude
|
||||
out <- r
|
||||
} else {
|
||||
log.Printf("failed to decode address for %s (%v)", r.url, err)
|
||||
}
|
||||
} else {
|
||||
close(out)
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func scrapeReview(url string, out chan review, cache *webCache, group *sync.WaitGroup, prof profiler) {
|
||||
defer group.Done()
|
||||
|
||||
doc, err := cache.load(url)
|
||||
if err != nil {
|
||||
log.Printf("failed to scrape review at %s (%v)", url, err)
|
||||
} else {
|
||||
out <- prof.profile(doc)
|
||||
}
|
||||
}
|
||||
|
||||
func scrapeIndex(indexUrl string, out chan review, cache *webCache, prof profiler) {
|
||||
var group sync.WaitGroup
|
||||
|
||||
doc, err := cache.load(indexUrl)
|
||||
if err != nil {
|
||||
log.Printf("failed to scrape index at %s (%v)", indexUrl, err)
|
||||
return
|
||||
}
|
||||
|
||||
nextIndexUrl, reviewUrls := prof.index(doc)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
for _, reviewUrl := range reviewUrls {
|
||||
absUrl, err := makeAbsUrl(reviewUrl, indexUrl)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
group.Add(1)
|
||||
go scrapeReview(absUrl, out, cache, &group, prof)
|
||||
}
|
||||
|
||||
group.Wait()
|
||||
|
||||
if nextIndexUrl == "" {
|
||||
close(out)
|
||||
} else {
|
||||
absUrl, err := makeAbsUrl(nextIndexUrl, indexUrl)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
scrapeIndex(absUrl, out, cache, prof)
|
||||
}
|
||||
}
|
||||
|
||||
func scrape(url string, wc *webCache, gc *geoCache, prof profiler) []review {
|
||||
scrapeChan := make(chan review)
|
||||
decodeChan := make(chan review)
|
||||
|
||||
go scrapeIndex(url, scrapeChan, wc, prof)
|
||||
go decodeReviews(scrapeChan, decodeChan, gc)
|
||||
|
||||
var reviews []review
|
||||
for {
|
||||
if r, ok := <-decodeChan; ok {
|
||||
reviews = append(reviews, r)
|
||||
} else {
|
||||
return reviews
|
||||
}
|
||||
}
|
||||
}
|
||||
198
tabelog.go
198
tabelog.go
@ -23,185 +23,59 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"io/ioutil"
|
||||
"log"
|
||||
"net/url"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
|
||||
"github.com/PuerkitoBio/goquery"
|
||||
)
|
||||
|
||||
type tabelogParams struct {
|
||||
Page int
|
||||
type tabelog struct {
|
||||
}
|
||||
|
||||
type tabelogReview struct {
|
||||
Name string
|
||||
Address string
|
||||
Url string
|
||||
|
||||
Dishes float64
|
||||
Service float64
|
||||
Atmosphere float64
|
||||
Cost float64
|
||||
Drinks float64
|
||||
|
||||
Latitude float64
|
||||
Longitude float64
|
||||
}
|
||||
|
||||
func makeAbsUrl(base, ref string) (string, error) {
|
||||
b, err := url.Parse(base)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
r, err := url.Parse(ref)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return b.ResolveReference(r).String(), nil
|
||||
}
|
||||
|
||||
func dumpReviews(filename string, in chan tabelogReview) error {
|
||||
var reviews []tabelogReview
|
||||
for {
|
||||
if review, ok := <-in; ok {
|
||||
reviews = append(reviews, review)
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
js, err := json.MarshalIndent(reviews, "", " ")
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := ioutil.WriteFile(filename, js, 0644); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func decodeReviews(in chan tabelogReview, out chan tabelogReview, gc *geoCache) {
|
||||
for {
|
||||
if review, ok := <-in; ok {
|
||||
pos, err := gc.decode(review.Address)
|
||||
if err == nil {
|
||||
review.Latitude = pos.Latitude
|
||||
review.Longitude = pos.Longitude
|
||||
out <- review
|
||||
} else {
|
||||
log.Printf("failed to decode address for %s (%v)", review.Url, err)
|
||||
}
|
||||
} else {
|
||||
close(out)
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func scrapeReview(url string, out chan tabelogReview, wc *webCache, wg *sync.WaitGroup) {
|
||||
defer wg.Done()
|
||||
|
||||
doc, err := wc.load(url)
|
||||
if err != nil {
|
||||
log.Printf("failed to scrape review at %s (%v)", url, err)
|
||||
return
|
||||
}
|
||||
|
||||
addresses := doc.Find("p.rd-detail-info__rst-address")
|
||||
if addresses.Length() != 2 {
|
||||
return
|
||||
}
|
||||
|
||||
var review tabelogReview
|
||||
|
||||
review.Url = url
|
||||
review.Name = doc.Find("a.rd-header__rst-name-main").Text()
|
||||
review.Address = strings.TrimSpace(addresses.First().Text())
|
||||
|
||||
if review.Dishes, err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(2)").Text(), 8); err != nil {
|
||||
return
|
||||
}
|
||||
if review.Service, err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(4)").Text(), 8); err != nil {
|
||||
return
|
||||
}
|
||||
if review.Atmosphere, err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(6)").Text(), 8); err != nil {
|
||||
return
|
||||
}
|
||||
if review.Cost, err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(8)").Text(), 8); err != nil {
|
||||
return
|
||||
}
|
||||
if review.Drinks, err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(10)").Text(), 8); err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
out <- review
|
||||
}
|
||||
|
||||
func scrapeIndex(url string, out chan tabelogReview, wc *webCache, wg *sync.WaitGroup) {
|
||||
doc, err := wc.load(url)
|
||||
if err != nil {
|
||||
log.Printf("failed to scrape index at %s (%v)", url, err)
|
||||
return
|
||||
}
|
||||
|
||||
func (t *tabelog) index(doc *goquery.Document) (string, []string) {
|
||||
var reviewUrls []string
|
||||
doc.Find("div.list-rst__header > p > a").Each(func(index int, sel *goquery.Selection) {
|
||||
if href, ok := sel.Attr("href"); ok {
|
||||
wg.Add(1)
|
||||
|
||||
absUrl, err := makeAbsUrl(url, href)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
go scrapeReview(absUrl, out, wc, wg)
|
||||
reviewUrls = append(reviewUrls, href)
|
||||
}
|
||||
})
|
||||
|
||||
var nextIndexUrl string
|
||||
if href, ok := doc.Find("a.c-pagination__target--next").Attr("href"); ok {
|
||||
absUrl, err := makeAbsUrl(url, href)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
scrapeIndex(absUrl, out, wc, wg)
|
||||
}
|
||||
}
|
||||
|
||||
func scrapeReviews(url string, out chan tabelogReview, wc *webCache) error {
|
||||
var wg sync.WaitGroup
|
||||
scrapeIndex(url, out, wc, &wg)
|
||||
wg.Wait()
|
||||
|
||||
close(out)
|
||||
return nil
|
||||
}
|
||||
|
||||
func scrapeTabelog(url, resultFile, webCacheDir, geoCacheFile string) error {
|
||||
wc, err := newWebCache(webCacheDir)
|
||||
if err != nil {
|
||||
return err
|
||||
nextIndexUrl = href
|
||||
}
|
||||
|
||||
gc, err := newGeoCache(geoCacheFile)
|
||||
if err != nil {
|
||||
return err
|
||||
return nextIndexUrl, reviewUrls
|
||||
}
|
||||
|
||||
func (t *tabelog) profile(doc *goquery.Document) *review {
|
||||
var r review
|
||||
|
||||
r.url = doc.Url.String()
|
||||
r.name = doc.Find("a.rd-header__rst-name-main").Text()
|
||||
|
||||
if addresses := doc.Find("p.rd-detail-info__rst-address"); addresses.Length() == 2 {
|
||||
r.address = strings.TrimSpace(addresses.First().Text())
|
||||
} else {
|
||||
return nil
|
||||
}
|
||||
|
||||
scrapeChan := make(chan tabelogReview, 2000)
|
||||
decodeChan := make(chan tabelogReview, 2000)
|
||||
var err error
|
||||
if r.features["dishes"], err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(2)").Text(), 8); err != nil {
|
||||
return nil
|
||||
}
|
||||
if r.features["service"], err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(4)").Text(), 8); err != nil {
|
||||
return nil
|
||||
}
|
||||
if r.features["atmosphere"], err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(6)").Text(), 8); err != nil {
|
||||
return nil
|
||||
}
|
||||
if r.features["cost"], err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(8)").Text(), 8); err != nil {
|
||||
return nil
|
||||
}
|
||||
if r.features["drinks"], err = strconv.ParseFloat(doc.Find("#js-rating-detail > dd:nth-child(10)").Text(), 8); err != nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
go decodeReviews(scrapeChan, decodeChan, gc)
|
||||
scrapeReviews(url, scrapeChan, wc)
|
||||
dumpReviews(resultFile, decodeChan)
|
||||
|
||||
return gc.save()
|
||||
return &r
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user