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scraper.go
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scraper.go
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package main
import (
"context"
"encoding/json"
"fmt"
"log"
"os"
"time"
"flag"
"github.com/schollz/progressbar/v3"
"github.com/chromedp/cdproto/cdp"
"github.com/chromedp/chromedp"
)
var (
latitude *string
longitude *string
numberOfPages *int
output *string
)
type Map struct {
ctx context.Context
BASE_URL string
zoom string
}
type Place struct {
Name string
Link string
}
func init() {
latitude = flag.String("latitude", "35.1344161", "Provide latitude")
longitude = flag.String("longitude", "33.3107072", "Provide longitude")
numberOfPages = flag.Int("numberOfPages", 3, "Provide the number of pages you want to crawl")
output = flag.String("output", "places.json", "Provide the output file name")
}
func (t *Map) getPlaces() []Place {
fmt.Println("get places")
var nodes []*cdp.Node
err := chromedp.Run(t.ctx,
// chromedp.Sleep(5*time.Second),
chromedp.Nodes("a.hfpxzc", &nodes, chromedp.ByQueryAll),
)
if err != nil {
log.Fatal(err)
}
places := []Place{}
for _, node := range nodes {
placeName, _ := node.Attribute("aria-label")
placeLink, _ := node.Attribute("href")
places = append(places, Place{Name: placeName, Link: placeLink})
}
return places
}
func (t *Map) scrollDown() {
fmt.Println("scroll down")
for i := 0; i < 5; i++ {
err := chromedp.Run(t.ctx,
// chromedp.Sleep(5*time.Second),
chromedp.Evaluate(`document.querySelector("#QA0Szd > div > div > div.w6VYqd > div.bJzME.tTVLSc > div > div.e07Vkf.kA9KIf > div > div > div.m6QErb.DxyBCb.kA9KIf.dS8AEf.ecceSd > div.m6QErb.DxyBCb.kA9KIf.dS8AEf.ecceSd").scroll(0,document.querySelector("#QA0Szd > div > div > div.w6VYqd > div.bJzME.tTVLSc > div > div.e07Vkf.kA9KIf > div > div > div.m6QErb.DxyBCb.kA9KIf.dS8AEf.ecceSd > div.m6QErb.DxyBCb.kA9KIf.dS8AEf.ecceSd").scrollHeight)`, nil),
)
if err != nil {
log.Fatal(err)
}
}
}
func (t *Map) nextPage() {
err := chromedp.Run(t.ctx,
chromedp.Click("#eY4Fjd", chromedp.ByQuery),
chromedp.Sleep(4*time.Second),
)
if err != nil {
log.Fatal(err)
}
}
func (t *Map) dumpToJson(places map[string]Place, outputFile string) error {
data := []Place{}
for _, place := range places {
data = append(data, place)
}
output, _ := json.Marshal(data)
f, err := os.Create(outputFile)
if err != nil {
return err
}
defer f.Close()
_, err = f.Write(output)
if err != nil {
return err
}
return nil
}
func main() {
flag.Parse()
var m Map
ctx, cancel := chromedp.NewContext(context.Background())
m.ctx = ctx
m.BASE_URL = "https://www.google.com/maps/search/Restaurants/@"
m.zoom = "13z"
defer cancel()
err := chromedp.Run(ctx,
chromedp.Navigate(m.BASE_URL+*latitude+","+*longitude+","+m.zoom),
)
if err != nil {
log.Fatal(err)
}
places := make(map[string]Place)
for i := 0; i < *numberOfPages; i++ {
m.scrollDown()
for _, place := range m.getPlaces() {
places[place.Name] = place
}
m.nextPage()
}
m.dumpToJson(places, *output)
}