cmd/http-reflect-server/initialization;

cmd/http-reflect-server/go.mod

@@ -0,0 +1,13 @@
+module git.blauwelle.com/go/crate/cmd/http-reflect-server
+
+go 1.20
+
+require (
+	git.blauwelle.com/go/crate/exegroup v0.3.0
+	git.blauwelle.com/go/crate/log v0.4.0
+)
+
+require (
+	git.blauwelle.com/go/crate/runtimehelper v0.1.0 // indirect
+	git.blauwelle.com/go/crate/synchelper v0.1.0 // indirect
+)

cmd/http-reflect-server/go.sum

@@ -0,0 +1,8 @@
+git.blauwelle.com/go/crate/exegroup v0.3.0 h1:TBLygDztECKc67NeIIBsFDxlA4KcJpbOmafqqRuKRcM=
+git.blauwelle.com/go/crate/exegroup v0.3.0/go.mod h1:DJoID54YI5WFHGHoTCjBao8oS3HFRzwbWMZW6P57AIQ=
+git.blauwelle.com/go/crate/log v0.4.0 h1:wK/qwO+a2YE51F6LdC9pZXL2AIARCRW0+AvFIF2Txt8=
+git.blauwelle.com/go/crate/log v0.4.0/go.mod h1:NfiG7YKQCTnLIcn6fVkaa2qEu+DuYi1Kz783Sc/F3jI=
+git.blauwelle.com/go/crate/runtimehelper v0.1.0 h1:qNhtnt9YmHXNHKsGRbwD3AZ3pezpOwrbmX1o9Bz532I=
+git.blauwelle.com/go/crate/runtimehelper v0.1.0/go.mod h1:yVMA0GkO9AS7iuPmalHKeWyv9en0JWj25rY1vpTuHhk=
+git.blauwelle.com/go/crate/synchelper v0.1.0 h1:4yEXpshkklaws/57P94xN5bA3NmyyKGcZqYmzd6QIK4=
+git.blauwelle.com/go/crate/synchelper v0.1.0/go.mod h1:2JkfH+7sF0Q0wiIaDOqG42ZLO5JxpcMfSoyy7db4Y2g=

cmd/http-reflect-server/handler.go

@@ -0,0 +1,155 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"git.blauwelle.com/go/crate/log"
+)
+
+func newHandler() http.HandlerFunc {
+	return func(rw http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+
+		var response Response
+
+		response.Request.TransferEncoding = r.TransferEncoding
+		response.Request.Proto = r.Proto
+		response.Request.Host = r.Host
+		response.Request.Method = r.Method
+		response.Request.URL = r.URL.String()
+		response.Request.RemoteAddr = r.RemoteAddr
+		response.Request.RequestURI = r.RequestURI
+		response.Request.Header = r.Header
+		response.Request.ContentLength = r.ContentLength
+
+		ctx := r.Context()
+
+		duration := time.Since(start)
+		code := http.StatusOK
+		var message string
+
+		if r.ContentLength > 0 {
+			if body, err := readBody(ctx, r); err != nil {
+				response.Error = err.Error()
+			} else {
+				response.Request.Body = body
+			}
+		}
+
+		rw.Header().Set("Content-Type", "application/json")
+		rw.WriteHeader(code)
+
+		end := time.Now()
+		response.ServeDuration = end.Sub(start).String()
+		encoder := json.NewEncoder(rw)
+		encoder.SetEscapeHTML(true)
+		encoder.SetIndent("", "  ")
+		err := encoder.Encode(response)
+		if err != nil {
+			log.Errorf(ctx, "json marshal: %s", err.Error())
+		}
+
+		log.WithFields(
+			log.Field("code", code),
+			log.Field("duration", duration.String()),
+		).Info(ctx, message)
+
+	}
+}
+
+type Response struct {
+	Error         string          `json:"error,omitempty"`
+	ServeDuration string          `json:"serveDuration"`
+	Request       ResponseRequest `json:"request"`
+}
+
+type MultipartFormFileInfo struct {
+	MIMEHeader map[string][]string `json:"mimeHeader"`
+	Filename   string              `json:"filename"`
+	Size       int64               `json:"size"`
+}
+
+type MultipartForm struct {
+	Values map[string][]string                `json:"values"`
+	Files  map[string][]MultipartFormFileInfo `json:"files"`
+}
+
+type ResponseRequest struct {
+	Header           http.Header `json:"header"`
+	Body             any         `json:"body"`
+	Proto            string      `json:"proto"`
+	Host             string      `json:"host"`
+	Method           string      `json:"method"`
+	URL              string      `json:"url"`
+	RemoteAddr       string      `json:"remoteAddr"`
+	RequestURI       string      `json:"requestUri"`
+	TransferEncoding []string    `json:"transferEncoding"`
+	ContentLength    int64       `json:"contentLength"`
+}
+
+func readBody(ctx context.Context, r *http.Request) (any, error) {
+	contentType := r.Header.Get("Content-Type")
+	switch {
+	case contentType == "":
+		return nil, nil
+	case strings.HasPrefix(contentType, "application/json"):
+		b, err := io.ReadAll(r.Body)
+		if err != nil {
+			err = fmt.Errorf("read: %w", err)
+			log.Error(ctx, err.Error())
+			return nil, err
+		}
+		if err := json.Unmarshal(b, new(any)); err != nil {
+			log.Error(ctx, err.Error())
+			return nil, err
+		}
+		return json.RawMessage(b), nil
+	case contentType == "application/x-www-form-urlencoded":
+		fallthrough
+	case strings.HasPrefix(contentType, "application/xml"):
+		fallthrough
+	case strings.HasPrefix(contentType, "text/"):
+		b, err := io.ReadAll(r.Body)
+		if err != nil {
+			panic(err)
+		}
+		return string(b), nil
+		//case :
+	case strings.HasPrefix(contentType, "multipart/form-data"):
+		if err := r.ParseMultipartForm(16 * 1024 * 1024); err != nil {
+			log.Error(ctx, err.Error())
+			return nil, err
+		}
+		body := MultipartForm{
+			Values: make(map[string][]string),
+			Files:  make(map[string][]MultipartFormFileInfo),
+		}
+		body.Values = r.MultipartForm.Value
+		for k, fs := range r.MultipartForm.File {
+			for _, f := range fs {
+				body.Files[k] = append(body.Files[k], MultipartFormFileInfo{
+					Filename:   f.Filename,
+					MIMEHeader: f.Header,
+					Size:       f.Size,
+				})
+			}
+		}
+		return body, nil
+	}
+	b, err := io.ReadAll(r.Body)
+	if err != nil {
+		err = fmt.Errorf("read: %w", err)
+		log.Error(ctx, err.Error())
+		return nil, err
+	}
+	if len(b) > 96 {
+		b = b[:96]
+	}
+	return b, nil
+}

cmd/http-reflect-server/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"net/http"
+
+	"git.blauwelle.com/go/crate/exegroup"
+	"git.blauwelle.com/go/crate/log"
+	"git.blauwelle.com/go/crate/log/logsdk"
+	"git.blauwelle.com/go/crate/log/logsdk/logjson"
+)
+
+var port = flag.Int("port", 8080, "HTTP Port")
+
+func main() {
+	flag.Parse()
+	log.Logger().AddProcessor(logsdk.AllLevels, logjson.New())
+	g := exegroup.Default()
+	mux := http.NewServeMux()
+	var handler http.Handler = mux
+	mux.HandleFunc("/", newHandler())
+	g.New().WithGoStop(exegroup.HttpListenAndServe(*port, handler))
+	log.Infof(context.Background(), "listening %d", *port)
+	log.Error(context.Background(), "exit: ", g.Run(context.Background()))
+}