chore: remove v1

image/image.go

@@ -0,0 +1,256 @@
+package image
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/h2non/filetype"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+	"golang.org/x/sys/unix"
+
+	"go.sour.is/paste/src/pkg/readutil"
+	"go.sour.is/pkg/lg"
+)
+
+type image struct {
+	store   string
+	maxSize int64
+}
+
+const DefaultMaxSize = 500 * 1024 * 1024
+
+func New(store string, maxSize int64) (a *image, err error) {
+	a = &image{
+		store:   store,
+		maxSize: DefaultMaxSize,
+	}
+
+	if maxSize > 0 {
+		a.maxSize = maxSize
+	}
+
+	if !chkStore(a.store) {
+		return nil, fmt.Errorf("image Store location [%s] does not exist or is not writable", a.store)
+	}
+
+	return a, nil
+}
+func (a *image) RegisterHTTP(mux *http.ServeMux) {
+	mux.Handle("/i", http.StripPrefix("/i", a))
+	mux.Handle("/i/", http.StripPrefix("/i/", a))
+	mux.Handle("3/upload", http.StripPrefix("/3/upload", a))
+
+}
+func (a *image) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	switch r.Method {
+	case http.MethodGet:
+		name := strings.TrimPrefix(r.URL.Path, "/")
+
+		a.get(ctx, w, name)
+	case http.MethodPost:
+		length := 0
+		if h := r.Header.Get("Content-Length"); h != "" {
+			if i, err := strconv.Atoi(h); err != nil {
+				length = i
+			}
+		}
+		id, err := a.put(ctx, w, r.Body, length)
+		switch {
+		case errors.Is(err, ErrGone):
+			w.WriteHeader(http.StatusGone)
+		case errors.Is(err, ErrNotFound):
+			w.WriteHeader(http.StatusNotFound)
+		case errors.Is(err, ErrReadingContent):
+			w.WriteHeader(http.StatusInternalServerError)
+		case errors.Is(err, ErrUnsupportedType):
+			w.WriteHeader(http.StatusUnsupportedMediaType)
+		}
+
+		type data struct{
+			Link string `json:"link"`
+			DeleteHash string `json:"deletehash"`
+		}
+		var resp = struct{
+			Data data `json:"data"`
+			Success bool `json:"success"`
+			Status int `json:"status"`
+		}{
+			Data: data{
+				Link: fmt.Sprintf("https://%s/%s", r.Host, id),
+			},
+			Success: true,
+			Status: 200,
+		}
+
+		json.NewEncoder(w).Encode(resp)
+
+	default:
+		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
+	}
+}
+
+func (a *image) get(ctx context.Context, w http.ResponseWriter, name string) error {
+	_, span := lg.Span(ctx)
+	defer span.End()
+
+	ext := filepath.Ext(name)
+	id := strings.TrimSuffix(name, ext)
+
+	fname := filepath.Join(a.store, id)
+
+	if !chkFile(fname) {
+		return fmt.Errorf("%w: %s", ErrNotFound, fname)
+	}
+
+	if chkGone(fname) {
+		return fmt.Errorf("%w: %s", ErrGone, fname)
+	}
+
+	f, err := os.Open(fname)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	pr := readutil.NewPreviewReader(f)
+
+	mime, err := readutil.ReadMIME(pr, name)
+	if err != nil {
+		return err
+	}
+	w.Header().Set("Content-Type", mime)
+	w.Header().Set("X-Content-Type-Options", "nosniff")
+
+	_, _ = io.Copy(w, pr.Drain())
+	return nil
+}
+
+func (a *image) put(ctx context.Context, w http.ResponseWriter, r io.ReadCloser, length int) (string, error) {
+	_, span := lg.Span(ctx)
+	defer span.End()
+
+	defer r.Close()
+
+	if length > 0 {
+		if int64(length) > a.maxSize {
+			return "", ErrSizeTooLarge
+		}
+	}
+
+	rdr := io.LimitReader(r, a.maxSize)
+	pr := readutil.NewPreviewReader(rdr)
+	if !isImageOrVideo(pr) {
+		return "", ErrUnsupportedType
+	}
+	rdr = pr.Drain()
+
+	s256 := sha256.New()
+	tmp, err := os.CreateTemp(a.store, "image-")
+	if err != nil {
+		return "", fmt.Errorf("%w: %w", ErrBadInput, err)
+	}
+
+	defer os.Remove(tmp.Name())
+
+	m := io.MultiWriter(s256, tmp)
+	if _, err := io.Copy(m, rdr); err != nil {
+		return "", fmt.Errorf("%w: %w", ErrBadInput, err)
+	}
+	tmp.Close()
+
+	id := base64.RawURLEncoding.EncodeToString(s256.Sum(nil)[12:])
+	fname := filepath.Join(a.store, id)
+
+	span.AddEvent("image: moving file", trace.WithAttributes(attribute.String("src", tmp.Name()), attribute.String("dst", fname)))
+	_ = os.Rename(tmp.Name(), fname)
+
+	return id, nil
+}
+
+func isImageOrVideo(in io.Reader) bool {
+	buf := make([]byte, 320)
+	_, err := in.Read(buf)
+	if err != nil {
+		return false
+	}
+	return filetype.IsImage(buf) || filetype.IsVideo(buf)
+}
+
+func chkStore(path string) bool {
+	file, err := os.Stat(path)
+
+	if err != nil && os.IsNotExist(err) {
+		err = os.MkdirAll(path, 0744)
+		if err != nil {
+			return false
+		}
+
+		file, err = os.Stat(path)
+	}
+
+	if err != nil {
+		return false
+	}
+
+	if !file.IsDir() {
+		return false
+	}
+
+	if unix.Access(path, unix.W_OK&unix.R_OK) != nil {
+		return false
+	}
+
+	return true
+}
+func chkFile(path string) bool {
+	file, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+
+	if file.IsDir() {
+		return false
+	}
+
+	if unix.Access(path, unix.W_OK&unix.R_OK) != nil {
+		return false
+	}
+
+	return true
+}
+func chkGone(path string) bool {
+	file, err := os.Stat(path)
+	if err != nil {
+		return true
+	}
+
+	if file.Size() == 0 {
+		return true
+	}
+
+	return false
+}
+
+var (
+	ErrNotFound        = errors.New("not found")
+	ErrGone            = errors.New("gone")
+	ErrReadingContent  = errors.New("reading content")
+	ErrSizeTooLarge    = errors.New("size too large")
+	ErrBadInput        = errors.New("bad input")
+	ErrUnsupportedType = errors.New("unsupported type")
+)