initial commit

.gitignore

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+# I you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.workf

build/.gitignore

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+*
+!.gitignore

go.mod

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+module repos.einweckglas.com/gorest
+
+go 1.18
+
+require github.com/gorilla/mux v1.8.0 // indirect

go.sum

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+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=

main.go

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+package main
+
+import (
+	"fmt";
+	"log";
+	"net/http";
+	"github.com/gorilla/mux";
+)
+
+func main() {
+	router := registerEndpoints()
+
+	fmt.Println("Starting server at :8000")
+	log.Fatal(http.ListenAndServe(":8000", router))
+}
+
+func registerEndpoints() *mux.Router {
+	router := mux.NewRouter().StrictSlash(true)
+
+	router.HandleFunc("/", ShowMessage).Methods("GET")
+	router.HandleFunc("/", SaveValue).Methods("POST")
+
+	return router
+}

toplevel.go

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+package main
+
+import (
+	"net/http";
+	"os";
+	"fmt";
+	"encoding/json";
+)
+
+type StorageInfo struct {
+	File		string `json:"filename"`
+	Content		string `json:"content"`
+}
+
+func ShowMessage(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello, World!")	
+}
+
+func SaveValue(w http.ResponseWriter, r *http.Request) {
+	var info StorageInfo
+
+	if err := json.NewDecoder(r.Body).Decode(&info); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	f, err := os.Create(info.File)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	defer func() {
+		if err := f.Close(); err != nil {
+			panic(err)
+		}
+	}()
+
+	if _, err := f.WriteString(info.Content); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}