Add port flag and update README

README.md

@@ -1 +1,81 @@
-❯ : PATH=~/go/bin:$PATH go generate ./...
+Front end for youtube-dl
+------------------------
+
+Bare minimum zero dependency¹ single binary web app to download youtube videos using youtube-dl. Allows multiple downloads in parallel. Shows title and live download progress. Pull requests welcome. For a more feature full nicer looking app, checkout [YoutubeDL-Material](https://github.com/Tzahi12345/YoutubeDL-Material)
+
+¹ Uses `golang.org/x/net` for websockets. It is strictly not part of go standard library.
+
+Usage
+-----
+
+    ❯ go install gitlab.com/balki/ytui@latest
+    go: downloading gitlab.com/balki/ytui v0.0.0-...
+
+
+    ❯ ~/go/bin/ytui -h
+    2022/06/30 10:53:46 Youtube UI
+    Usage of /home/balki/go/bin/ytui:
+      -cachepath string
+            Path where temporary download files are saved (default "./cache")
+      -dbpath string
+            Path where downloaded info is saved (default "./db.json")
+      -port int
+            Port to listen on (default 8080)
+      -videospath string
+            Path where videos are saved (default "./vids")
+      -videosurl string
+            Prefix of the url, i.e. https://domain.com/<this var>/<video filename> (default "/vids")
+      -ytdlcmd string
+            youtube-dl command seperated by spaces (default "youtube-dl")
+    
+My Deployment setup
+-------------------
+
+## File: /usr/local/lib/systemd/system/ytui.service
+
+    [Unit]
+    Description=Youtube UI
+    
+    [Service]
+    User=ytui
+    Type=simple
+    StateDirectory=ytui
+    WorkingDirectory=/var/lib/ytui
+    ExecStart=/path/to/ytui -ytdlcmd "youtube-dl --proxy socks5://x.x.x.x:1080"
+    
+    [Install]
+    WantedBy=multi-user.target
+
+## File: /usr/local/lib/sysusers.d/ytui.conf
+
+    # See sysusers.d(5) for details.
+    
+    u ytui - "Youtube UI"
+
+## File: /etc/caddy/conf.d/ytui.conf
+ 
+Make sure your main caddy file includes this
+
+    ytui.mydomain.com {
+        root * /var/lib/ytui
+    
+        handle /vids/* {
+            file_server
+        }
+    
+        handle {
+            reverse_proxy 127.0.0.1:8080
+        }
+    }
+
+## Setup Commands
+
+    sudo systemctl daemon-reload
+    sudo systemctl restart systemd-sysusers
+    sudo systemctl start ytui.service
+    sudo systemctl restart caddy
+
+Progress Tracker
+----------------
+
+Wrote a small go helper [ProgressTracker](https://gitlab.com/balki/ytui/-/blob/main/pubsub/pt.go), to watch for progress and update subscribers. Hope it is useful elsewhere too. It has full unit test coverage

main.go

@@ -24,14 +24,13 @@ import (
 //go:embed templates/index.html
 var page string
 
-const port = 8080
-
 var (
 	ytdlCmd    = []string{"youtube-dl"}
 	videosPath = "./vids"
 	videosUrl  = "/vids"
 	cachePath  = "./cache"
 	dbPath     = "./db.json"
+	port       = 8080
 )
 
 var d *db.Db
@@ -43,6 +42,8 @@ func parse() {
 	flag.StringVar(&videosUrl, "videosurl", videosUrl, "Prefix of the url, i.e. https://domain.com/<this var>/<video filename>")
 	flag.StringVar(&cachePath, "cachepath", cachePath, "Path where temporary download files are saved")
 	flag.StringVar(&dbPath, "dbpath", dbPath, "Path where downloaded info is saved")
+	flag.IntVar(&port, "port", port, "Port to listen on")
+
 	flag.Parse()
 	if ytcmd != ytdlCmd[0] {
 		ytdlCmd = strings.Fields(ytcmd)