Add HTTPProber widget and API to display website statuses

apis/httpprober/main.go

@@ -0,0 +1,86 @@
+package httpprober
+
+import (
+	"crypto/tls"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+const websitesFile = "websites.json"
+
+type Website struct {
+	URL    string `json:"url"`
+	Icon   string `json:"icon"`
+	Status int    `json:"status"`
+}
+
+func RunProbe() []Website {
+	results := make([]Website, 0)
+	websites := websites()
+
+	client, err := buildHTTPClient()
+	if err != nil {
+		return websites
+	}
+
+	for _, website := range websites {
+		if website.URL != "" && !strings.Contains(website.URL, "://") {
+			website.URL = "https://" + website.URL
+		}
+		website.Status = testMethod(client, website)
+		results = append(results, website)
+	}
+
+	return results
+}
+
+func websites() []Website {
+	websites := make([]Website, 0)
+	file, err := os.ReadFile(websitesFile)
+	if err == nil {
+		if err := json.Unmarshal(file, &websites); err != nil {
+			panic(err)
+		}
+	}
+	return websites
+}
+
+func buildHTTPClient() (*http.Client, error) {
+	timeout := 10
+
+	client := &http.Client{
+		Timeout: time.Duration(timeout) * time.Second,
+	}
+
+	transport := &http.Transport{
+		TLSClientConfig: &tls.Config{},
+	}
+
+	client.Transport = transport
+
+	return client, nil
+}
+
+func testMethod(client *http.Client, target Website) int {
+	req, err := http.NewRequest("GET", target.URL, nil)
+	if err != nil {
+		fmt.Println(err)
+		return -2
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		fmt.Println(err)
+		return -1
+	}
+	defer func(body io.ReadCloser) {
+		_ = body.Close()
+	}(resp.Body)
+
+	return resp.StatusCode
+}