adding validation for proxy url

pkg/validations/proxy_validation.go

@@ -0,0 +1,44 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the Apache v2.0 license.
+
+package validations
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"github.com/microsoft/moc/pkg/errors"
+)
+
+func ValidateProxyURL(proxyURL string) error {
+	parsedURL, err := url.Parse(proxyURL)
+
+	if err != nil {
+		return errors.Wrapf(errors.InvalidInput, err)
+	}
+
+	if parsedURL.Scheme != "http"{
+		return errors.Wrapf(errors.InvalidInput, "Invalid proxy URL. The URL scheme should be http")	
+	}
+
+	// Create a transport
+	transport := &http.Transport{
+		Proxy: http.ProxyURL(parsedURL),
+	}
+
+	// Create a client
+	client := &http.Client{
+		Transport: transport,
+	}
+
+	// Test the HTTP GET request
+	response, err := client.Get("http://bing.com")
+	if err != nil {
+		return errors.Wrapf(errors.InvalidInput, err)
+	} else {
+		defer response.Body.Close()
+		fmt.Println("Connected successfully to the proxy server")
+	}
+
+	return nil
+}

pkg/validations/proxy_validation_test.go

@@ -0,0 +1,17 @@
+import (
+	"testing"
+)
+
+func Test_ValidateProxyURL(t *testing.T){
+	err := ValidateProxyURL("http://akse2e:akse2e@skyproxy.ceccloud1.selfhost.corp.microsoft.com:3128")
+
+	if(err!=nil){
+		t.Fatalf("ValidateProxyURL returned error")
+	}
+
+	err = ValidateProxyURL("https://akse2e:akse2e@skyproxy.ceccloud1.selfhost.corp.microsoft.com:3128")
+
+	if err != "Invalid proxy URL. The URL scheme should be http"{
+		t.Fatalf("Didnt receive the expected error 'Invalid proxy URL. The URL scheme should be http'")
+	}
+}