commit 9f6190a762afedec8b008d6ccd8791ff59217b50
Author: ptrcnull <git@ptrcnull.me>
Date:   Mon Feb 28 15:56:36 2022 +0100

    feat: Initial commit

diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..5a94675
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module gaypaste
+
+go 1.17
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..0de5d81
--- /dev/null
+++ b/main.go
@@ -0,0 +1,78 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"io"
+	"log"
+	"math/rand"
+	"net/http"
+	"os"
+	"path"
+	"time"
+)
+
+const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+func init() {
+	rand.Seed(time.Now().UnixNano())
+}
+
+// RandString taken from https://stackoverflow.com/a/31832326
+func RandString(n int) string {
+	b := make([]byte, n)
+	for i := range b {
+		b[i] = letterBytes[rand.Int63()%int64(len(letterBytes))]
+	}
+	return string(b)
+}
+
+var dataDirFlag = flag.String("dataDir", "/tmp", "directory for files")
+var domainFlag = flag.String("domain", "http://localhost:8085", "base domain")
+
+func main() {
+	h := &Handler{
+		DataDir: *dataDirFlag,
+		Domain:  *domainFlag,
+	}
+	log.Println("listening")
+	panic(http.ListenAndServe(":8085", h))
+}
+
+type Handler struct {
+	DataDir string
+	Domain  string
+}
+
+func (h *Handler) ServeHTTP(wr http.ResponseWriter, req *http.Request) {
+	if req.Method != "POST" {
+		return
+	}
+
+	name := RandString(8)
+	for {
+		_, err := os.Stat(path.Join(h.DataDir, name))
+		if errors.Is(err, os.ErrNotExist) {
+			break
+		}
+
+		name = RandString(8)
+	}
+
+	file, err := os.OpenFile(path.Join(h.DataDir, name), os.O_CREATE|os.O_RDWR, 0o644)
+	if err != nil {
+		log.Println("error:", err)
+		return
+	}
+	defer file.Close()
+	defer req.Body.Close()
+
+	_, err = io.Copy(file, req.Body)
+	if err != nil {
+		log.Println("error:", err)
+		return
+	}
+
+	log.Println("uploaded as", name)
+	wr.Write([]byte(h.Domain + "/" + name))
+}