From c448abd99a470e1ec541027077dcdef0745270d8 Mon Sep 17 00:00:00 2001
From: Feuerfuchs <git@feuerfuchs.dev>
Date: Sun, 23 Jun 2019 17:29:07 +0200
Subject: Show expandable thumbnails for images

---
 gopherproxy.go | 42 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 36 insertions(+), 6 deletions(-)

(limited to 'gopherproxy.go')

diff --git a/gopherproxy.go b/gopherproxy.go
index 11c08d5..62b7446 100644
--- a/gopherproxy.go
+++ b/gopherproxy.go
@@ -10,6 +10,7 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"regexp"
 	"strings"
 
 	"github.com/temoto/robotstxt"
@@ -17,6 +18,8 @@ import (
 	"github.com/prologic/go-gopher"
 
 	"github.com/gobuffalo/packr"
+
+	"github.com/davidbyttow/govips/pkg/vips"
 )
 
 type Item struct {
@@ -25,7 +28,7 @@ type Item struct {
 	Text string
 }
 
-func renderDirectory(w http.ResponseWriter, tpl *template.Template, styletext string, uri string, hostport string, d gopher.Directory) error {
+func renderDirectory(w http.ResponseWriter, tpl *template.Template, styletext string, jstext string, uri string, hostport string, d gopher.Directory) error {
 	var title string
 
 	out := make([]Item, len(d.Items))
@@ -78,9 +81,10 @@ func renderDirectory(w http.ResponseWriter, tpl *template.Template, styletext st
 		Title   string
 		URI     string
 		Style   string
+		Script  string
 		Lines   []Item
 		RawText string
-	}{title, fmt.Sprintf("%s/%s", hostport, uri), styletext, out, ""})
+	}{title, fmt.Sprintf("%s/%s", hostport, uri), styletext, jstext, out, ""})
 }
 
 // GopherHandler returns a Handler that proxies requests
@@ -88,7 +92,7 @@ func renderDirectory(w http.ResponseWriter, tpl *template.Template, styletext st
 // to the request path and renders the content using the provided template.
 // The optional robots parameters points to a robotstxt.RobotsData struct
 // to test user agents against a configurable robotst.txt file.
-func GopherHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, robotsdebug bool, styletext string, uri string) http.HandlerFunc {
+func GopherHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, robotsdebug bool, styletext string, jstext string, uri string) http.HandlerFunc {
 	return func(w http.ResponseWriter, req *http.Request) {
 		agent := req.UserAgent()
 		path := strings.TrimPrefix(req.URL.Path, "/")
@@ -140,14 +144,23 @@ func GopherHandler(tpl *template.Template, robotsdata *robotstxt.RobotsData, rob
 					Title   string
 					URI     string
 					Style   string
+					Script  string
 					RawText string
 					Lines   []Item
-				}{uri, fmt.Sprintf("%s/%s", hostport, uri), styletext, buf.String(), nil})
+				}{uri, fmt.Sprintf("%s/%s", hostport, uri), styletext, jstext, buf.String(), nil})
+			} else if parts[1] == "T" {
+				_, _, err = vips.NewTransform().
+					Load(res.Body).
+					ResizeStrategy(vips.ResizeStrategyAuto).
+					ResizeWidth(160).
+					Quality(75).
+					Output(w).
+					Apply()
 			} else {
 				io.Copy(w, res.Body)
 			}
 		} else {
-			if err := renderDirectory(w, tpl, styletext, uri, hostport, res.Dir); err != nil {
+			if err := renderDirectory(w, tpl, styletext, jstext, uri, hostport, res.Dir); err != nil {
 				io.WriteString(w, fmt.Sprintf("<b>Error:</b><pre>%s</pre>", err))
 				return
 			}
@@ -240,6 +253,11 @@ func ListenAndServe(bind, robotsfile string, robotsdebug bool, uri string) error
 		styletext = ""
 	}
 
+	jstext, err := box.FindString("main.js")
+	if err != nil {
+		jstext = ""
+	}
+
 	favicondata, err := box.Find("favicon.ico")
 	if err != nil {
 		favicondata = []byte{}
@@ -257,6 +275,9 @@ func ListenAndServe(bind, robotsfile string, robotsdebug bool, uri string) error
 		"safeCss": func(s string) template.CSS {
 			return template.CSS(s)
 		},
+		"safeJs": func(s string) template.JS {
+			return template.JS(s)
+		},
 		"HTMLEscape": func(s string) string {
 			return html.EscapeString(s)
 		},
@@ -267,6 +288,11 @@ func ListenAndServe(bind, robotsfile string, robotsdebug bool, uri string) error
 		"pop": func(s []string) []string {
 			return s[:len(s)-1]
 		},
+		"replace": func(pattern, output string, input interface{}) string {
+			var re = regexp.MustCompile(pattern)
+			var inputStr = fmt.Sprintf("%v", input)
+			return re.ReplaceAllString(inputStr, output)
+		},
 	}
 
 	tpl, err = template.New("gophermenu").Funcs(funcMap).Parse(tpltext)
@@ -274,7 +300,11 @@ func ListenAndServe(bind, robotsfile string, robotsdebug bool, uri string) error
 		log.Fatal(err)
 	}
 
-	http.HandleFunc("/", GopherHandler(tpl, robotsdata, robotsdebug, styletext, uri))
+	vips.Startup(&vips.Config{
+		ConcurrencyLevel: 2,
+	})
+
+	http.HandleFunc("/", GopherHandler(tpl, robotsdata, robotsdebug, styletext, jstext, uri))
 	http.HandleFunc("/robots.txt", RobotsTxtHandler(robotstxtdata))
 	http.HandleFunc("/favicon.ico", FaviconHandler(favicondata))
 	http.HandleFunc("/iosevka-term-ss03-regular.woff", FontHandler(false, fontdataw))
-- 
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