commit - c6fd4def314f51c06c6da606ec1ac303fcdd4f7b
commit + ae97f74824d466663bbb1d408b197cb266528fa9
blob - c43de7e62e1ad4cb7f660bd2fe219168869da3b7
blob + f4278c87b36aa1812fbbe3004a8def0b4bbc7c43
--- main.go
+++ main.go
@@ -8,6 +8,7 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+	"path"
 	"path/filepath"
 	"regexp"
 
@@ -18,12 +19,12 @@ var (
 	baseurl = flag.String("baseurl", "gemini://m2i.omarpolo.com", "base url")
 	matrixOutDir = flag.String("matrix-out", "", "matrix out directory")
 
-	matrixRe = regexp.MustCompile(`https://matrix.org/[^\s]+\.txt`)
+	matrixRe = regexp.MustCompile(`https://.*/[^\s]+\.(txt|png|jpg|jpeg|gif)`)
 	channel = "#gemini-it"
 )
 
 func matrix2gemini(conn *irc.Conn, line *irc.Line) {
-	matches := matrixRe.FindAllString(line.Text(), -1)
+	matches := msgRe.FindAllString(line.Text(), -1)
 
 	// it's not a good idea to defer inside a loop, but we know
 	// len(matches) is small (usually just 1).  Morover, I like
@@ -40,7 +41,8 @@ func matrix2gemini(conn *irc.Conn, line *irc.Line) {
 		}
 		defer resp.Body.Close()
 
-		tmpfile, err := ioutil.TempFile(*matrixOutDir, "message-")
+		ext := path.Ext(link)
+		tmpfile, err := ioutil.TempFile(*matrixOutDir, "message-*" + ext)
 		if err != nil {
 			conn.Privmsg(channel, fmt.Sprintf("failed to tmpfile: %s", err))
 			return