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amazonbeat.go
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amazonbeat.go
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package beater
import (
"fmt"
"time"
"os"
"os/exec"
"path/filepath"
"encoding/json"
"io/ioutil"
"strconv"
"github.com/elastic/beats/libbeat/beat"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/logp"
"github.com/elastic/beats/libbeat/publisher"
"github.com/awormuth/amazonbeat/config"
)
type Amazonbeat struct {
done chan struct{}
config config.Config
client publisher.Client
}
type ProductData struct {
Name string `json:"product"`
SalePrice string `json:"salePrice"`
OriginalPrice string `json:"originalPrice"`
ASIN string `json:"asin"`
NumReviews string `json:"numReviews"`
Rating string `json:"rating"`
}
// Creates beater
func New(b *beat.Beat, cfg *common.Config) (beat.Beater, error) {
config := config.DefaultConfig
if err := cfg.Unpack(&config); err != nil {
return nil, fmt.Errorf("Error reading config file: %v", err)
}
bt := &Amazonbeat{
done: make(chan struct{}),
config: config,
}
return bt, nil
}
func (bt *Amazonbeat) readAmazonData(asin string) (ProductData, error) {
productData := ProductData{}
// Get filepath for currently running script.
dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
if err != nil {
return productData, err
}
// Execute python script that pulls amazon product data.
cmd := exec.Command("python", dir + "/readAmazonData.py", asin)
err = cmd.Run()
if err != nil {
return productData, err
}
// Read data.json file into ProductData struct.
raw, err := ioutil.ReadFile(dir + "/data.json")
if err != nil {
return productData, err
}
err = json.Unmarshal(raw, &productData)
if err != nil {
return productData, err
}
return productData, nil
}
func (bt *Amazonbeat) Run(b *beat.Beat) error {
logp.Info("amazonbeat is running! Hit CTRL-C to stop it.")
bt.client = b.Publisher.Connect()
ticker := time.NewTicker(bt.config.Period)
for {
select {
case <-bt.done:
return nil
case <-ticker.C:
}
now := time.Now()
productData, err := bt.readAmazonData(bt.config.ASIN)
if err != nil {
fmt.Println(err)
return nil
}
// Convert strings to appropriate data types before sending to ElasticSearch.
salePrice, _ := strconv.ParseFloat(productData.SalePrice, 64)
originalPrice, _ := strconv.ParseFloat(productData.OriginalPrice, 64)
numReviews, _ := strconv.ParseUint(productData.NumReviews, 0, 64)
rating, _ := strconv.ParseFloat(productData.Rating, 64)
event := common.MapStr{
"@timestamp": common.Time(now),
"type": b.Name,
"product": productData.Name,
"saleprice": salePrice,
"originalprice": originalPrice,
"asin": productData.ASIN,
"numreviews": numReviews,
"rating": rating,
}
bt.client.PublishEvent(event)
logp.Info("Event sent")
}
}
func (bt *Amazonbeat) Stop() {
bt.client.Close()
close(bt.done)
}