Add Residential Proxy API support

example/resproxy/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/ipinfo/go/v2/ipinfo"
+)
+
+func main() {
+	// Get access token by signing up a free account at
+	// https://ipinfo.io/signup.
+	// Provide token as an environment variable `TOKEN`,
+	// e.g. TOKEN="XXXXXXXXXXXXXX" go run main.go
+	client := ipinfo.NewClient(nil, nil, os.Getenv("TOKEN"))
+	resproxy, err := client.GetResproxy("175.107.211.204")
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("%v\n", resproxy)
+}

ipinfo/resproxy.go

@@ -0,0 +1,46 @@
+package ipinfo
+
+// ResproxyDetails represents residential proxy detection details for an IP.
+type ResproxyDetails struct {
+	IP              string  `json:"ip"`
+	LastSeen        string  `json:"last_seen"`
+	PercentDaysSeen float64 `json:"percent_days_seen"`
+	Service         string  `json:"service"`
+}
+
+// GetResproxy returns the residential proxy details for the specified IP.
+func GetResproxy(ip string) (*ResproxyDetails, error) {
+	return DefaultClient.GetResproxy(ip)
+}
+
+// GetResproxy returns the residential proxy details for the specified IP.
+func (c *Client) GetResproxy(ip string) (*ResproxyDetails, error) {
+	// perform cache lookup.
+	cacheKey := cacheKey("resproxy:" + ip)
+	if c.Cache != nil {
+		if res, err := c.Cache.Get(cacheKey); err == nil {
+			return res.(*ResproxyDetails), nil
+		}
+	}
+
+	// prepare req
+	req, err := c.newRequest(nil, "GET", "resproxy/"+ip, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// do req
+	v := new(ResproxyDetails)
+	if _, err := c.do(req, v); err != nil {
+		return nil, err
+	}
+
+	// cache req result
+	if c.Cache != nil {
+		if err := c.Cache.Set(cacheKey, v); err != nil {
+			return v, err
+		}
+	}
+
+	return v, nil
+}