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package main | |
import ( | |
"fmt" | |
"log" | |
"regexp" | |
"strconv" | |
"time" | |
"github.com/PuerkitoBio/goquery" | |
"github.com/influxdata/influxdb/client/v2" | |
) | |
/* | |
* Today we will be scraping the webpage | |
* https://www.google.dk/search?q=weather+aalborg&oq=weather+aalborg&sourceid=chrome&ie=UTF-8 | |
* and logging into influxdb | |
*/ | |
type Weather struct { | |
Temp float64 | |
Humidity uint64 | |
} | |
var re = regexp.MustCompile("[^0-9]") | |
func Save(w *Weather) { | |
// Make client | |
c, err := client.NewHTTPClient(client.HTTPConfig{ | |
Addr: "http://localhost:8086", | |
Username: "", | |
Password: "", | |
}) | |
if err != nil { | |
log.Fatalln("Influx error: ", err) | |
} | |
// Create a new point batch | |
bp, err := client.NewBatchPoints(client.BatchPointsConfig{ | |
Database: "house", | |
Precision: "s", | |
}) | |
if err != nil { | |
log.Fatalln("Influx error: ", err) | |
} | |
// Create a point and add to batch | |
tags := map[string]string{"location": "outside"} | |
fields := map[string]interface{}{ | |
"temperature": w.Temp, | |
"humidity": w.Humidity, | |
} | |
pt, err := client.NewPoint("house", tags, fields, time.Now()) | |
if err != nil { | |
log.Fatalln("Error: ", err) | |
} | |
bp.AddPoint(pt) | |
// Write the batch | |
c.Write(bp) | |
log.Printf("Data saved to influx") | |
} | |
func Scrape() Weather { | |
doc, err := goquery.NewDocument("https://www.google.dk/search?q=weather+aalborg&oq=weather+aalborg&sourceid=chrome&ie=UTF-8") | |
if err != nil { | |
log.Fatal(err) | |
} | |
tempText := doc.Find("#ires > ol > div:nth-child(1) > div > table:nth-child(2) > tbody > tr:nth-child(1) > td:nth-child(2) > span").Text() | |
humidityText := doc.Find("#ires > ol > div:nth-child(1) > div > table:nth-child(2) > tbody > tr:nth-child(5) > td:nth-child(1)").Text() | |
temp, err := strconv.ParseFloat(re.ReplaceAllString(tempText, ""), 64) | |
if err != nil { | |
log.Printf("Cannot parse %s: %s", tempText, err.Error()) | |
} | |
humidity, err := strconv.ParseUint(re.ReplaceAllString(humidityText, ""), 10, 64) | |
if err != nil { | |
log.Printf("Cannot parse %s: %s", humidityText, err.Error()) | |
} | |
return Weather{Temp: temp, Humidity: humidity} | |
} | |
func main() { | |
fmt.Println("Hej mide") | |
w := Scrape() | |
fmt.Printf("Weather: %+v\n", w) | |
Save(&w) | |
} |
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