maint: remove deps and add docs

.gitignore

@@ -0,0 +1 @@
+lash

Makefile

@@ -0,0 +1,12 @@
+GO?= go
+
+.PHONY: build lint
+
+all: build
+
+build:
+	$(GO) build -o lash ./bin/main.go
+
+lint:
+	$(GO) fmt ./...
+	$(GO) vet ./...

README.md

@@ -1 +1,21 @@
 # LASH (Local Area Share HTTP)
+
+## Usage
+Using lash is pretty simple. You just provide any amount of command line
+arguments and it will generate a share link, and a code. You either go-to
+http://<your-local-ip>:port or goto http://<your-share-link> to access the
+files.
+
+## Building from Source
+Lash only has one dependency and that it is Go >= 1.26.3. To build it you just
+run either of the two following commands.
+
+```sh
+$ make
+```
+
+or
+
+```sh
+$ go build -o lash ./bin/main.go
+```

TODO

@@ -0,0 +1 @@
+feat: sumbit code with press of enter key

bin/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	_ "embed"
+	"flag"
+	"fmt"
+	"lash"
+	"lash/internal/app"
+	"lash/internal/errx"
+	share "lash/internal/shareLink"
+	"net/http"
+)
+
+var versionFlag = flag.Bool("version", false, "Print out version and exit.")
+
+var port = flag.Int("p", 1337, "Set the port for LASH exchanges.")
+var numberOfShares = flag.Int("n", -1, "Number of shares to allow before killing the server.")
+
+func main() {
+	flag.Parse()
+
+	if *versionFlag {
+		fmt.Print("lash/vxc v", lash.Version)
+		return
+	}
+
+	ctx := lash.LashContext{
+		N: *numberOfShares,
+	}
+
+	srv := app.New(&ctx)
+
+	server := http.Server{
+		Addr:    fmt.Sprintf(":%d", *port),
+		Handler: srv,
+	}
+
+	errx.Log("Your share link is %s", share.GenerateShareLink(*port))
+	errx.Log("Your token is \033[1;92m%s\033[0m", lash.Token)
+	errx.Log("starting server at http://%s:%d", share.GetLocalIP(), *port)
+	if err := server.ListenAndServe(); err != nil {
+		errx.FatalPerror(err)
+	}
+}

go.mod

@@ -1,5 +1,3 @@
 module lash
 
 go 1.26.3
-
-require github.com/google/uuid v1.6.0 // indirect

go.sum

@@ -1,2 +0,0 @@
-github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
-github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

internal/app/routes.go

@@ -0,0 +1,45 @@
+package app
+
+import (
+	"flag"
+	"lash"
+	"lash/internal/errx"
+	"lash/internal/handlers"
+	"net/http"
+	"os"
+)
+
+func New(ctx *lash.LashContext) http.Handler {
+	mux := http.NewServeMux()
+
+	share := handlers.ShareData{
+		Version: lash.Version,
+	}
+
+	file := handlers.FileHandler{
+		Ctx: ctx,
+	}
+
+	fps := flag.Args()
+	if len(fps) < 1 {
+		errx.FatalPerror(errx.ErrNotEnoughArgs)
+	}
+
+	for _, fp := range fps {
+		contents, err := os.ReadFile(fp)
+		if err != nil {
+			errx.FatalPerror(err)
+		}
+
+		file.FileData = append(file.FileData, handlers.FileData{
+			Contents: contents,
+			FileName: fp,
+		})
+	}
+
+	mux.HandleFunc("/", share.Handler)
+	mux.HandleFunc("/api/receive-token", file.APIHandler)
+	mux.HandleFunc("/"+lash.ShareLinkToken, file.FileHandler)
+
+	return mux
+}

internal/errx/define.go

@@ -0,0 +1,5 @@
+package errx
+
+import "errors"
+
+var ErrNotEnoughArgs error = errors.New("not enough arguments")

internal/errx/error.go

@@ -0,0 +1,7 @@
+package errx
+
+import "fmt"
+
+func Error(err string) {
+	fmt.Println("error:", "lash:", err)
+}

internal/errx/perror.go

@@ -0,0 +1,15 @@
+package errx
+
+import (
+	"fmt"
+	"os"
+)
+
+func Perror(err error) {
+	fmt.Println("error:", "lash:", err)
+}
+
+func FatalPerror(err error) {
+	Perror(err)
+	os.Exit(1)
+}

internal/errx/print.go

@@ -0,0 +1,7 @@
+package errx
+
+import "fmt"
+
+func Log(msg string, k ...any) {
+	fmt.Printf("lash: "+msg+"\n", k...)
+}

internal/generator/generator.go

@@ -0,0 +1,55 @@
+package generator
+
+import (
+	"math/rand/v2"
+)
+
+var keys []string = []string{
+	"octo",
+	"cool",
+	"whip",
+	"keys",
+	"cats",
+	"part",
+	"rate",
+	"face",
+	"lard",
+	"larp",
+	"dogs",
+	"cash",
+	"city",
+	"cold",
+	"desk",
+	"down",
+	"dirt",
+	"long",
+	"mean",
+	"news",
+	"only",
+	"open",
+	"year",
+	"wood",
+	"wing",
+	"work",
+	"wash",
+	"vote",
+	"onyx",
+	"snow",
+	"john",
+	"json",
+	"fang",
+}
+
+func Generate(n int) (code string) {
+	codeLen := n
+
+	start := rand.IntN(len(keys))
+
+	for i := range codeLen {
+		code += keys[(start+i)%len(keys)]
+		if i != codeLen-1 {
+			code += "-"
+		}
+	}
+	return
+}

internal/handlers/file.go

@@ -0,0 +1,83 @@
+package handlers
+
+import (
+	"archive/zip"
+	"encoding/json"
+	"fmt"
+	"lash"
+	"lash/internal/errx"
+	"net/http"
+	"strconv"
+)
+
+type FileHandler struct {
+	Ctx      *lash.LashContext
+	FileData []FileData
+}
+
+type FileData struct {
+	Contents []byte
+	FileName string
+}
+
+type ValidateRequest struct {
+	Token string
+}
+
+var sent int = 0
+
+func (h FileHandler) APIHandler(w http.ResponseWriter, r *http.Request) {
+	decoder := json.NewDecoder(r.Body)
+
+	var t ValidateRequest
+	err := decoder.Decode(&t)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if t.Token != lash.Token {
+		http.Error(w, "Invalid Token", http.StatusUnauthorized)
+		return
+	}
+
+	http.Redirect(w, r, fmt.Sprintf("/%s", lash.ShareLinkToken), http.StatusTemporaryRedirect)
+}
+
+func (h FileHandler) FileHandler(w http.ResponseWriter, r *http.Request) {
+	if sent >= h.Ctx.N && h.Ctx.N != -1 {
+		http.Error(w, "Too many requests", http.StatusTooManyRequests)
+		return
+	}
+
+	filename := h.FileData[0].FileName
+	if len(h.FileData) > 1 {
+		filename = "lash.zip"
+	}
+
+	w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s"`, filename))
+	w.Header().Set("Content-Type", "application/octet-stream")
+
+	if len(h.FileData) == 1 {
+		w.Header().Set("Content-Length", strconv.Itoa(len(h.FileData[0].Contents)))
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write(h.FileData[0].Contents)
+	} else {
+		w.WriteHeader(http.StatusOK)
+		zw := zip.NewWriter(w)
+		defer zw.Close()
+
+		for _, f := range h.FileData {
+			fw, err := zw.Create(f.FileName)
+			if err != nil {
+				errx.FatalPerror(err)
+			}
+			_, err = fw.Write(f.Contents)
+			if err != nil {
+				errx.FatalPerror(err)
+			}
+		}
+	}
+
+	sent++
+}

internal/handlers/share.go

@@ -0,0 +1,21 @@
+package handlers
+
+import (
+	"html/template"
+	"net/http"
+
+	"lash"
+)
+
+type ShareData struct {
+	Version  string
+	FileName string
+}
+
+func (h *ShareData) Handler(w http.ResponseWriter, r *http.Request) {
+	tmpl := template.Must(template.ParseFS(lash.Templates, "templates/share.html"))
+
+	if err := tmpl.ExecuteTemplate(w, "share.html", h); err != nil {
+		http.Error(w, "template render error: "+err.Error(), http.StatusInternalServerError)
+	}
+}

internal/shareLink/shareLink.go

@@ -0,0 +1,29 @@
+package sharelink
+
+import (
+	"fmt"
+	"lash"
+	"lash/internal/errx"
+	"net"
+)
+
+func GenerateShareLink(port int) string {
+	link := "http://"
+	link += GetLocalIP()
+	link += fmt.Sprintf(":%d", port)
+	link += "/"
+	link += lash.ShareLinkToken
+	return link
+}
+
+func GetLocalIP() string {
+	conn, err := net.Dial("udp", "8.8.8.8:80")
+	if err != nil {
+		errx.FatalPerror(err)
+	}
+	defer conn.Close()
+
+	localAddress := conn.LocalAddr().(*net.UDPAddr)
+
+	return localAddress.IP.String()
+}

lash.go

@@ -0,0 +1,22 @@
+package lash
+
+import (
+	"embed"
+	"lash/internal/generator"
+	"net/http"
+)
+
+type LashContext struct {
+	N      int
+	Server *http.Server
+}
+
+//go:embed templates/*.html
+var Templates embed.FS
+
+//go:embed version
+var Version string
+
+var Token string = generator.Generate(5)
+
+var ShareLinkToken string = generator.Generate(8)

main.go

@@ -1,65 +0,0 @@
-package main
-
-import (
-	_ "embed"
-	"errors"
-	"fmt"
-	"html/template"
-	"log"
-	"net/http"
-	"os"
-	"github.com/google/uuid"
-)
-
-//go:embed version
-var version string
-
-var fp string
-var read []byte
-var id string = uuid.New().String()
-
-type Data struct {
-	Version string
-	FileName string
-	Contents []byte
-	UUID string
-}
-
-func main() {
-	if len(os.Args) < 2 {
-		fmt.Println("error: lash: not enough arguments")
-		return
-	}
-	fp = os.Args[1]
-	var err error
-	read, err = os.ReadFile(fp)
-	if err != nil {
-		if errors.Is(err, os.ErrNotExist) {
-			fmt.Printf("error: lash: file `%s` does not exist", fp)
-		} else {
-			panic(err)
-		}
-	}
-
-
-	http.HandleFunc("/", shareHandler)
-	http.HandleFunc(fmt.Sprintf("/%s", id), fileHandler)
-	fmt.Println("lash: starting server at http://127.0.0.1:1337")
-	log.Fatal(http.ListenAndServe("127.0.0.1:1337", nil))
-}
-
-func shareHandler(w http.ResponseWriter, r *http.Request) {
-	tmpl := template.Must(template.ParseFiles("templates/share.html"))
-
-	data := Data{
-		Version: version,
-		FileName: fp,
-		UUID: id,
-	}
-
-	tmpl.ExecuteTemplate(w, "share.html", data)
-}
-
-func fileHandler(w http.ResponseWriter, r *http.Request) {
-	w.Write(read)
-}

templates/share.html

@@ -1,12 +1,78 @@
 <!DOCTYPE html>
 <html lang="en">
 	<head>
-<meta charset="UTF-8">
-<meta name="viewport" content="width=device-width, initial-scale=1.0">
+		<meta charset="UTF-8" />
+		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
 		<title>Lash v{{.Version}}</title>
 	</head>
 
 	<body>
-	<h1><a href="/{{.UUID}}" download>{{.FileName}}</a></h1>
+		<h1>Enter Token</h1>
+
+		<input
+				type="text"
+				id="tokenInput"
+				placeholder="Enter token"
+				/>
+
+		<button id="submitBtn">
+			Submit
+		</button>
+
+		<p id="status"></p>
+
+		<script>
+	const tokenInput = document.getElementById('tokenInput');
+	const submitBtn = document.getElementById('submitBtn');
+	const status = document.getElementById('status');
+
+	submitBtn.addEventListener('click', async () => {
+		const token = tokenInput.value.trim();
+
+		if (!token) {
+			status.textContent = 'Please enter a token.';
+			return;
+		}
+
+		try {
+			const response = await fetch('/api/receive-token', {
+				method: 'POST',
+				headers: {
+					'Content-Type': 'application/json'
+				},
+				body: JSON.stringify({ token })
+			});
+
+			if (!response.ok) {
+				status.textContent = 'Download failed.';
+				return;
+			}
+
+			const blob = await response.blob();
+			const url = window.URL.createObjectURL(blob);
+			const a = document.createElement('a');
+			a.href = url;
+			const disposition = response.headers.get('Content-Disposition');
+
+			let filename = 'download.bin';
+
+			if (disposition && disposition.includes('filename=')) {
+				filename = disposition
+					.split('filename=')[1]
+					.replace(/"/g, '');
+			}
+
+			a.download = filename;
+			document.body.appendChild(a);
+			a.click();
+			a.remove();
+			window.URL.revokeObjectURL(url);
+			status.textContent = 'Download started.';
+		} catch (err) {
+			console.error(err);
+			status.textContent = 'An error occurred.';
+		}
+	});
+</script>
 	</body>
 </html>

version

@@ -1 +1 @@
-0.1.0
+6