Feat(index.html, main.go): Add ability to strip fsh.ee specific data.

index.html

@@ -29,13 +29,17 @@ A Minimal, SQLite-Backed URL Shortener
 <pre><code>| Examples:
 | 
 | 1. Create a short link to https://duckduckgo.com
-| 	$ curl -d https://duckduckgo.com %s
-| 	%s/502fb5543c36014f
+| 	$ curl -d https://duckduckgo.com {{.URL}}
+| 	{{.URL}}/502fb5543c36014f
 | 
-| 2. Deleting a short link
+| 2. Create a short link with a custom path
+|	$ curl -d https://duckduckgo.com {{.URL}}/ddg
+| 	{{.URL}}/ddg
+| 
+| 3. Deleting a short link
 | 	$ TMP=$(mktemp)
 | 	$ # temp file will store header
-| 	$ LINK=$(curl -sS %s -d https://duckduckgo.com -D $TMP)
+| 	$ LINK=$(curl -sS {{.URL}} -d https://duckduckgo.com -D $TMP)
 | 	$ # the link has been successfully created
 | 	$ DEL=$(cat $TMP | grep -i delete-with | awk '{print$2}'| tr -d '\r')
 | 	$ # deletion key is stored in 'X-Delete-With' header.
@@ -47,6 +51,7 @@ A Minimal, SQLite-Backed URL Shortener
 | 	record not found
 | 	$ # the link has been successfully deleted.</code></pre>
 		
+{{if .Demo}}
 <p>
 Please note: this is an example deployment. If you attempt to create a short 
 link here you will receive a 401 Unauthorized. If you like the examples above
@@ -56,26 +61,27 @@ to do (one of the design goals). Below are instructions detailing how.
 		
 <pre><code>| How to self-host:
 | 
-| 1. Install dependencies:
-| 	a. The Go programming language:
+| 1. Install dependencies
+| 	a. The Go programming language
 | 		<a href='https://golang.org/doc/install'>https://golang.org/doc/install</a>
-| 	b. Git version control.
+| 	b. Git version control
 | 		<a href='https://git-scm.com/book/en/v2/Getting-Started-Installing-Git'>https://git-scm.com/book/en/v2/Getting-Started-Installing-Git</a>
 | 
 | 	* On FreeBSD this would be: 
 | 		$ pkg install -y go git 
 | 
-| 2. Fetch, complile, and execute the source code:
+| 2. Fetch, complile, and execute the source code
 | 	$ env GO111MODULE=off go get git.fsh.ee/i/link
 | 	$ env GO111MODULE=off go run git.fsh.ee/i/link -url https://your.domain.com -port 8080 -db /path/to/sqlite/file -seed secret
 | 
 | * The server is now running on localhost at port 8080.
 | * If the SQLite database at this filepath does not exist it will be created.
 | * All logging will be printed to standard error and standard output.</code></pre>
+{{end}}
 		
 <footer style='white-space: pre;'>Source code: 	<a href='https://fsh.ee/src'>fsh.ee/src</a>
-License:	AGPL v3
-Copy: 		2021 i@fsh.ee
-Made with:	Go, Vim, and FreeBSD
-Unrelated blog:	<a href='https://etc.fsh.ee/'>etc.fsh.ee</a>
+License:	AGPL v3{{if .Copy}}
+Copy: 		{{.Copy}}{{end}}
+Made with:	Go, Vim, and FreeBSD{{if .Demo}}
+Unrelated blog:	<a href='https://etc.fsh.ee/'>etc.fsh.ee</a>{{end}}
 </footer>

main.go

@@ -22,6 +22,7 @@ import (
 	"flag"
 	"fmt"
 	"hash/maphash"
+	"html/template"
 	"io/ioutil"
 	"log"
 	"net/http"
@@ -117,11 +118,13 @@ func (db DB) DelLink(smol, del string) error {
 type controller struct {
 	log       *log.Logger
 	db        DB
-	url string
+	demo      bool
+	url, copy string
+	tmpl      *template.Template
 }
 
-func NewController(logger *log.Logger, db DB, url string) controller {
-	return controller{logger, db, strings.TrimRight(url, "/")}
+func NewController(logger *log.Logger, db DB, demo bool, url, copy string, tmpl *template.Template) controller {
+	return controller{logger, db, demo, strings.TrimRight(url, "/"), copy, tmpl}
 }
 
 func (c controller) Err(rw http.ResponseWriter, r *http.Request, err error) {
@@ -142,8 +145,15 @@ func (c controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 		switch strings.TrimRight(r.URL.Path, "/") {
 
 		case "":
-			rw.Header().Add("Content-Type", "text/html")
-			rw.Write([]byte(fmt.Sprintf(indexTemplate, c.url, c.url, c.url)))
+			data := map[string]interface{}{
+				"URL":  c.url,
+				"Demo": c.demo,
+				"Copy": c.copy,
+			}
+			if err := c.tmpl.Execute(rw, data); err != nil {
+				c.Err(rw, r, err)
+				return
+			}
 			return
 
 		case "/favicon.ico":
@@ -229,10 +239,12 @@ func main() {
 		startupLogger     = log.New(os.Stdout, logPrefix, 0)
 		applicationLogger = log.New(ioutil.Discard, logPrefix, 0)
 		v                 = flag.Bool("v", false, "verbose logging")
+		demo              = flag.Bool("demo", false, "turn on demo mode")
 		port              = flag.Uint("port", 8080, "port to listen on")
 		dbFilePath        = flag.String("db", "", "sqlite database filepath: required")
 		url               = flag.String("url", "", "service url: required")
 		hashSeed          = flag.String("seed", "", "hash seed: required")
+		copy              = flag.String("copy", "", "copyright information")
 	)
 	flag.Parse()
 	if *dbFilePath == "" || *url == "" || *hashSeed == "" {
@@ -247,7 +259,12 @@ func main() {
 		startupLogger.Fatal(err)
 		return
 	}
-	http.Handle("/", NewController(applicationLogger, db, *url))
+	tmpl, err := template.New("").Parse(indexTemplate)
+	if err != nil {
+		startupLogger.Fatal(err)
+		return
+	}
+	http.Handle("/", NewController(applicationLogger, db, *demo, *url, *copy, tmpl))
 	startupLogger.Println("listening on port", *port)
 	startupLogger.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *port), nil))
 }

makefile

@@ -22,7 +22,7 @@ test:
 
 run: gen build
 	@clear
-	@env $(ENV) ./$(BIN) -v -url https://dev.fsh.ee -port 8080 -db /tmp/link_test_db_1.sql -seed secret
+	@env $(ENV) ./$(BIN) -v -demo -copy "2021 i@fsh.ee" -url https://dev.fsh.ee -port 8080 -db /tmp/link_test_db_1.sql -seed secret
 
 dev:
 	@find . -type f | grep -E '(.*)\.(go|html)' | entr -cr make run