Add POST support

cmd/furl/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bufio"
 	"bytes"
 	"context"
 	"crypto/ed25519"
@@ -17,12 +18,13 @@ import (
 
 var requestFrom = flag.String("from", "", "the server name that the request should originate from")
 var requestKey = flag.String("key", "matrix_key.pem", "the private key to use when signing the request")
+var requestPost = flag.Bool("post", false, "send a POST request instead of GET (pipe input into stdin or type followed by Ctrl-D)")
 
 func main() {
 	flag.Parse()
 
 	if requestFrom == nil || *requestFrom == "" {
-		fmt.Println("expecting: furl -from ... [-key matrix_key.pem] https://path/to/url")
+		fmt.Println("expecting: furl -from origin.com [-key matrix_key.pem] https://path/to/url")
 		fmt.Println("supported flags:")
 		flag.PrintDefaults()
 		os.Exit(1)
@@ -59,12 +61,36 @@ func main() {
 		panic(err)
 	}
 
+	var bodyObj interface{}
+	var bodyBytes []byte
+	method := "GET"
+	if *requestPost {
+		method = "POST"
+		fmt.Println("Waiting for JSON input. Press Enter followed by Ctrl-D when done...")
+
+		scan := bufio.NewScanner(os.Stdin)
+		for scan.Scan() {
+			bytes := scan.Bytes()
+			bodyBytes = append(bodyBytes, bytes...)
+		}
+		fmt.Println("Done!")
+		if err = json.Unmarshal(bodyBytes, &bodyObj); err != nil {
+			panic(err)
+		}
+	}
+
 	req := gomatrixserverlib.NewFederationRequest(
-		"GET",
+		method,
 		gomatrixserverlib.ServerName(u.Host),
 		u.RequestURI(),
 	)
 
+	if *requestPost {
+		if err = req.SetContent(bodyObj); err != nil {
+			panic(err)
+		}
+	}
+
 	if err = req.Sign(
 		gomatrixserverlib.ServerName(*requestFrom),
 		gomatrixserverlib.KeyID(keyBlock.Headers["Key-ID"]),