first version

.gitignore

@@ -13,3 +13,6 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
+
+# Pycharms
+.idea

README.md

@@ -14,7 +14,7 @@ Usage: curlRed.exe / curlRed
 Example (ipv4): curlRed.exe 1.1.1.1
 Example (ipv6): curlRed.exe 2a03:2880:2130:cf05:face:b00c::1.Faceb00c
 Example (domain): curlRed.exe google.com
-Example (batch mode): 1.1.1.1 2a03:2880:2130:cf05:face:b00c::1.Faceb00c google.com
+Example (batch mode): curlRed.exe 1.1.1.1 2a03:2880:2130:cf05:face:b00c::1.Faceb00c google.com
 ```
 
 Build

curlRed.go

@@ -0,0 +1,55 @@
+// Fetchall fetches URLs in parallel and reports their times and sizes.
+package main
+
+import (
+	"fmt"
+	"github.com/common-nighthawk/go-figure"
+	"io"
+	"net/http"
+	"os"
+	"strconv"
+	"time"
+)
+
+func main() {
+	start := time.Now()
+	ch := make(chan string)
+
+	if len(os.Args[1:]) >= 1 {
+		for _, url := range os.Args[1:] {
+			go fetch(url, ch) // start a goroutine
+		}
+		for range os.Args[1:] {
+			fmt.Println(<-ch) // receive from channel ch
+		}
+		argCount := strconv.Itoa(len(os.Args[1:]))
+		fmt.Printf("%.2fs elapsed %s %s", time.Since(start).Seconds(), argCount, "lookup(s)")
+	} else {
+		banner := figure.NewColorFigure("curlRED", "graffiti", "red", true)
+		go fetch("", ch) // start a goroutine
+		banner.Print()
+		fmt.Println(<-ch) // receive from channel ch
+		fmt.Println("\n\nUsage: curlRed.exe / curlRed\nExample (ipv4): curlRed.exe 1.1.1.1\nExample (ipv6): curlRed.exe 2a03:2880:2130:cf05:face:b00c::1.Faceb00c\nExample (domain): curlRed.exe google.com\nExample (batch mode): curlRed.exe 1.1.1.1 2a03:2880:2130:cf05:face:b00c::1.Faceb00c google.com")
+	}
+	fmt.Println()
+
+}
+
+func fetch(lookup string, ch chan<- string) {
+	start := time.Now()
+	resp, err := http.Get("https://curl.red/" + lookup)
+	if err != nil {
+		ch <- fmt.Sprint(err) // send to channel ch
+		return
+	}
+
+	body, err := io.ReadAll(resp.Body)
+
+	resp.Body.Close() // don't leak resources
+	if err != nil {
+		ch <- fmt.Sprintf("while reading %s: %v", lookup, err)
+		return
+	}
+	secs := time.Since(start).Seconds()
+	ch <- fmt.Sprintf("%.2fs %s %s %s %s", secs, "|", lookup, "|", body)
+}

go.mod

@@ -0,0 +1,5 @@
+module curlRed
+
+go 1.19
+
+require github.com/common-nighthawk/go-figure v0.0.0-20210622060536-734e95fb86be // indirect

go.sum

@@ -0,0 +1,2 @@
+github.com/common-nighthawk/go-figure v0.0.0-20210622060536-734e95fb86be h1:J5BL2kskAlV9ckgEsNQXscjIaLiOYiZ75d4e94E6dcQ=
+github.com/common-nighthawk/go-figure v0.0.0-20210622060536-734e95fb86be/go.mod h1:mk5IQ+Y0ZeO87b858TlA645sVcEcbiX6YqP98kt+7+w=