handmade dummy S3 local dev server

src/hmns3/hmns3.go

@@ -0,0 +1,78 @@
+package hmns3
+
+import (
+	_ "embed"
+	"fmt"
+	"git.handmade.network/hmn/hmn/src/website"
+	"github.com/spf13/cobra"
+	"io"
+	"io/fs"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+)
+
+func init() {
+	s3Command := &cobra.Command{
+		Use:   "hmns3 [storage folder]",
+		Short: "Run a local s3 server that stores in the filesystem",
+		Run: func(cmd *cobra.Command, args []string) {
+			targetFolder := "./tmp"
+			if len(args) > 0 {
+				targetFolder = args[0]
+			}
+			err := os.MkdirAll(targetFolder, fs.ModePerm)
+			if err != nil {
+				panic(err)
+			}
+
+			handler := func(w http.ResponseWriter, r *http.Request) {
+				bucket, key := bucket_key(r)
+			
+				fmt.Println("\n\nIncoming request path:", r.URL.Path)
+				bodyBytes, err := io.ReadAll(r.Body)
+				fmt.Println("Bucket: ", bucket, " key: ", key, " method: ", r.Method, " len(body): ", len(bodyBytes))
+				if err != nil {
+					panic(err)
+				}
+				if r.Method == http.MethodPut {
+					w.Header().Set("Location", fmt.Sprintf("/%s", bucket))
+					err := os.MkdirAll(fmt.Sprintf("%s/%s", targetFolder, bucket), fs.ModePerm)
+					if err != nil {
+						panic(err)
+					}
+					if key != "" {
+						err = os.WriteFile(fmt.Sprintf("%s/%s/%s",targetFolder, bucket, key),   bodyBytes, fs.ModePerm)
+						if err != nil {
+							panic(err)
+						}
+					}
+				} else if r.Method == http.MethodGet {
+					fileBytes, err := os.ReadFile(fmt.Sprintf("%s/%s/%s",  targetFolder, bucket, key))
+					if err != nil {
+						panic(err)
+					}
+					w.Write(fileBytes)
+				} else {
+					panic("Unimplemented method!")
+				}
+			}
+
+			http.HandleFunc("/", handler)
+			log.Fatal(http.ListenAndServe(":80", nil))
+		},
+	}
+
+	website.WebsiteCommand.AddCommand(s3Command)
+}
+
+
+func bucket_key(r *http.Request) (string, string) {
+	slashIdx := strings.IndexByte(r.URL.Path[1:], '/')
+	if slashIdx == -1 {
+		return r.URL.Path[1:], ""
+	} else {
+		return r.URL.Path[1 : 1+slashIdx], strings.Replace(r.URL.Path[2+slashIdx:], "/", "~", -1)
+	}
+}

src/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	_ "git.handmade.network/hmn/hmn/src/admintools"
+	_ "git.handmade.network/hmn/hmn/src/hmns3"
 	_ "git.handmade.network/hmn/hmn/src/assets"
 	_ "git.handmade.network/hmn/hmn/src/buildscss"
 	_ "git.handmade.network/hmn/hmn/src/discord/cmd"