/
collector.go
59 lines (49 loc) · 971 Bytes
/
collector.go
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package generic
import (
"io"
"net/http"
"github.com/prometheus/client_golang/prometheus"
log "github.com/sirupsen/logrus"
)
type Collector struct {
client *http.Client
target string
metrics []Metric
}
func NewCollector(client *http.Client, target string, metrics []Metric) *Collector {
return &Collector{
client: client,
target: target,
metrics: metrics,
}
}
func (c *Collector) Describe(ch chan<- *prometheus.Desc) {
for _, m := range c.metrics {
ch <- m.desc
}
}
func (c *Collector) Collect(ch chan<- prometheus.Metric) {
data, err := c.probe()
if err != nil {
log.Error(err)
return
}
for _, m := range c.metrics {
pm := m.get(m.desc, data)
if pm != nil {
ch <- pm
}
}
}
func (c *Collector) probe() (string, error) {
resp, err := c.client.Get(c.target)
if err != nil {
return "", err
}
defer resp.Body.Close()
data, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(data), nil
}