Init: Main app created

go.mod

@@ -0,0 +1,3 @@
+module poster
+
+go 1.14

main.go

@@ -0,0 +1,177 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+)
+
+func main() {
+	// Name of the executable
+	exeName := "poster"
+	// Help Message (-h, --help)
+	helpMsg := `Usage: %[1]s [FLAGS] URL
+Execute HTTP-Requests and print responses to stdout
+
+  -m <method> Method to use for the request (default "get")
+     POST '{"mydata": "string", "nene": 31}' https://rest.api/lele/lala
+     PUT '{"mydata": "string", "nene": 31}' https://rest.api/lele/lala/31
+     PATCH '{"mydata": "string", "nene": 31}' https://rest.api/lele/lala/31
+     Note: Use "" around everything but numbers, also wrap whole json in ''
+  -h, --help Print this message.
+
+Examples:
+  %[1]s https://rest.api/posts/1337
+  %[1]s -m PUT '{"fooo": "bäü߀r", "userId": 42}' https://rest.api/posts/1
+  %[1]s -m DELETE https://rest.api/posts/1
+`
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), helpMsg, exeName)
+	}
+
+	// Name, default val, help
+	m := flag.String("m", "get", "Method for the request.")
+
+	flag.Parse()
+	// Number of all flags (executable name included -> 0 indexed)
+	l := len(os.Args) - flag.NArg()
+	// Only get the arguments after all flags
+	args := os.Args[l:]
+	al := len(args)
+	// Requested url/web resource
+	resource := args[al - 1]
+	// http client used for PUT, PATCH, DELETE
+	client := &http.Client{}
+
+	method := strings.ToLower(*m)
+	switch method {
+	// -------------------------------------------------------------------------
+	//	GET
+	// -------------------------------------------------------------------------
+	case "get":
+		fmt.Println("GET -> " + resource + " reported:")
+		res, err := http.Get(resource)
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer res.Body.Close()
+		// Read everything from body
+		body, err := ioutil.ReadAll(res.Body)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("\n\n%s\n\n", body)
+	// -------------------------------------------------------------------------
+	//	HEAD
+	// -------------------------------------------------------------------------
+	case "head":
+		fmt.Println("HEAD -> " + resource + " reported:")
+		res, err := http.Head(resource)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("\n\n%s\n\n", res.Header)
+	// -------------------------------------------------------------------------
+	//	POST
+	// -------------------------------------------------------------------------
+	case "post":
+		fmt.Println("POST -> " + resource + " reported:")
+		if al != 2 {
+			msg := `Error: Wrong number of arguments
+Usage: %s -m POST '{"mydata": "string", "nene": 31}' https://a-website.org/lele/lala
+Note: Use "" around everything but numbers, also wrap json in ''
+`
+			fmt.Printf(msg, exeName)
+			os.Exit(1)
+		}
+		data := args[0]
+		res, err := http.Post(resource, "application/json; charset=UTF-8", bytes.NewBufferString(data))
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer res.Body.Close()
+		body, err := ioutil.ReadAll(res.Body)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("\n\n%s\n\n", body)
+	// -------------------------------------------------------------------------
+	//	PUT
+	// -------------------------------------------------------------------------
+	case "put":
+		fmt.Println("PUT -> " + resource + " reported:")
+		if al != 2 {
+			msg := `Error: Wrong number of arguments
+Usage: %s -m PUT '{"mydata": "string", "nene": 31}' https://a-website.org/lele/lala/123
+Note: Use "" around everything but numbers, also wrap json in ''
+`
+			fmt.Printf(msg, exeName)
+			os.Exit(1)
+		}
+		data := args[0]
+		req, err := http.NewRequest(http.MethodPut, resource ,bytes.NewBufferString(data))
+		if err != nil {
+			log.Fatal(err)
+		}
+		req.Header.Set("Content-Type", "application/json; charset=UTF-8")
+		res, err := client.Do(req)
+		defer res.Body.Close()
+		body, err := ioutil.ReadAll(res.Body)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("\n\n%s\n\n", body)
+	// -------------------------------------------------------------------------
+	//	PATCH
+	// -------------------------------------------------------------------------
+	case "patch":
+		fmt.Println("PATCH -> " + resource + " reported:")
+		if al != 2 {
+			msg := `Error: Wrong number of arguments
+Usage: %s -m PUT '{"mydata": "string", "nene": 31}' https://a-website.org/lele/lala/123
+Note: Use "" around everything but numbers, also wrap json in ''
+`
+			fmt.Printf(msg, exeName)
+			os.Exit(1)
+		}
+		data := args[0]
+		req, err := http.NewRequest(http.MethodPatch, resource ,bytes.NewBufferString(data))
+		if err != nil {
+			log.Fatal(err)
+		}
+		req.Header.Set("Content-Type", "application/json; charset=UTF-8")
+		res, err := client.Do(req)
+		defer res.Body.Close()
+		body, err := ioutil.ReadAll(res.Body)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("\n\n%s\n\n", body)
+	// -------------------------------------------------------------------------
+	//	DELETE
+	// -------------------------------------------------------------------------
+	case "delete":
+		fmt.Println("DELETE -> " + resource + " reported:")
+		req, err := http.NewRequest(http.MethodDelete, resource, nil)
+		if err != nil {
+			log.Fatal(err)
+		}
+		res, err := client.Do(req)
+		defer res.Body.Close()
+		body, err := ioutil.ReadAll(res.Body)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("\n\n%s\n\n", body)
+	// -------------------------------------------------------------------------
+	//	DEFAULT
+	// -------------------------------------------------------------------------
+	default:
+		fmt.Println("Method unknown, use: GET, HEAD, POST, PUT, PATCH, DELETE")
+	}
+}