From b238d11be5852ecba1b72116545e7c8b2fed6133 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Sun, 30 Jul 2023 14:44:09 +0300
Subject: [PATCH] Serve /img/ on gemini

---
 cmd/sgblog/gemini-entry.tmpl |  4 ++--
 cmd/sgblog/gemini.go         | 20 ++++++++++++++++++++
 common.go                    |  2 +-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/cmd/sgblog/gemini-entry.tmpl b/cmd/sgblog/gemini-entry.tmpl
index 67d6fc4..abbca9e 100644
--- a/cmd/sgblog/gemini-entry.tmpl
+++ b/cmd/sgblog/gemini-entry.tmpl
@@ -1,4 +1,4 @@
-{{$Cfg := .Cfg -}}{{$CR := printf "\r"}}20 text/gemini{{$CR}}
+{{$CR := printf "\r"}}20 text/gemini{{$CR}}
 # {{.Title}}
 {{$.T.Get "What"}}: {{.Commit.Hash.String}}
 {{$.T.Get "When"}}: {{.When}}
@@ -12,7 +12,7 @@
 ```
 {{end -}}
 {{- if .Images}}
-{{range $idx, $img := .Images}}=> http://{{$Cfg.ImgDomain}}/{{$img.Path}} {{$img.Alt}}
+{{range $idx, $img := .Images}}=> /img/{{$img.Path}} {{$img.Alt}}
 {{end}}
 {{end -}}
 {{- if .Cfg.CommentsEmail}}
diff --git a/cmd/sgblog/gemini.go b/cmd/sgblog/gemini.go
index 527874e..ccf719d 100644
--- a/cmd/sgblog/gemini.go
+++ b/cmd/sgblog/gemini.go
@@ -26,7 +26,9 @@ import (
 	"log"
 	"net/url"
 	"os"
+	"path"
 	"strconv"
+	"strings"
 	"text/template"
 
 	"github.com/go-git/go-git/v5"
@@ -209,6 +211,24 @@ func serveGemini(cfgPath string) {
 		if err != nil {
 			log.Fatalln(err)
 		}
+	} else if strings.HasPrefix(u.Path, "/img/") {
+		pth := strings.TrimPrefix(u.Path, "/img/")
+		if strings.Contains(pth, "..") {
+			log.Fatalln("unacceptable double dots")
+		}
+		typ := ImgTypes[path.Ext(pth)]
+		if typ == "" {
+			typ = "application/octet-stream"
+		}
+		fd, err := os.Open(path.Join(cfg.ImgPath, pth))
+		if err != nil {
+			log.Fatalln(err)
+		}
+		bw := bufio.NewWriter(os.Stdout)
+		bw.Write([]byte("20 " + typ + "\r\n"))
+		io.Copy(bw, bufio.NewReader(fd))
+		fd.Close()
+		bw.Flush()
 	} else {
 		makeGemErr(errors.New("unknown URL action"))
 	}
diff --git a/common.go b/common.go
index 9a33a4a..1f5984a 100644
--- a/common.go
+++ b/common.go
@@ -15,7 +15,7 @@ import (
 )
 
 const (
-	Version = "0.29.0"
+	Version = "0.30.0"
 	WhenFmt = "2006-01-02 15:04:05Z07:00"
 )
 
-- 
2.44.0