Allow restricting file download

This commit is contained in:
Torjus Håkestad 2021-12-06 20:13:04 +01:00
parent 570531ce0b
commit 02425ca40c
6 changed files with 333 additions and 155 deletions

View File

@ -23,6 +23,7 @@ import (
"golang.org/x/term"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/protobuf/types/known/timestamppb"
)
func ActionClientGet(c *cli.Context) error {
@ -97,6 +98,13 @@ func ActionClientUpload(c *cli.Context) error {
}
req := &pb.UploadFileRequest{Data: data, OriginalFilename: filepath.Base(arg)}
req.WithPasscode = c.Bool("with-passcode")
req.MaxViews = c.Int64("max-views")
if c.IsSet("ttl") {
duration := c.Duration("ttl")
expiresOn := time.Now().Add(duration)
req.ExpiresOn = timestamppb.New(expiresOn)
}
resp, err := client.UploadFile(c.Context, req)
if err != nil {

14
main.go
View File

@ -74,6 +74,20 @@ func main() {
Name: "upload",
Usage: "Upload file(s)",
ArgsUsage: "PATH [PATH]..",
Flags: []cli.Flag{
&cli.BoolFlag{
Name: "with-passcode",
Usage: "Require passcode to view",
},
&cli.DurationFlag{
Name: "ttl",
Usage: "Expire file when duration has passed",
},
&cli.IntFlag{
Name: "max-views",
Usage: "Limit the amount of times the file can be viewed.",
},
},
Action: actions.ActionClientUpload,
},
{

View File

@ -193,6 +193,8 @@ type UploadFileRequest struct {
Data []byte `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
OriginalFilename string `protobuf:"bytes,2,opt,name=original_filename,json=originalFilename,proto3" json:"original_filename,omitempty"`
ExpiresOn *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=expires_on,json=expiresOn,proto3" json:"expires_on,omitempty"`
MaxViews int64 `protobuf:"varint,4,opt,name=max_views,json=maxViews,proto3" json:"max_views,omitempty"`
WithPasscode bool `protobuf:"varint,5,opt,name=with_passcode,json=withPasscode,proto3" json:"with_passcode,omitempty"`
}
func (x *UploadFileRequest) Reset() {
@ -248,6 +250,20 @@ func (x *UploadFileRequest) GetExpiresOn() *timestamppb.Timestamp {
return nil
}
func (x *UploadFileRequest) GetMaxViews() int64 {
if x != nil {
return x.MaxViews
}
return 0
}
func (x *UploadFileRequest) GetWithPasscode() bool {
if x != nil {
return x.WithPasscode
}
return false
}
type UploadFileResponse struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -310,6 +326,7 @@ type GetFileRequest struct {
unknownFields protoimpl.UnknownFields
Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
Passcode string `protobuf:"bytes,2,opt,name=passcode,proto3" json:"passcode,omitempty"`
}
func (x *GetFileRequest) Reset() {
@ -351,6 +368,13 @@ func (x *GetFileRequest) GetId() string {
return ""
}
func (x *GetFileRequest) GetPasscode() string {
if x != nil {
return x.Passcode
}
return ""
}
type GetFileResponse struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -1168,6 +1192,9 @@ type File_Metadata struct {
UploadedOn *timestamppb.Timestamp `protobuf:"bytes,1,opt,name=uploaded_on,json=uploadedOn,proto3" json:"uploaded_on,omitempty"`
ExpiresOn *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=expires_on,json=expiresOn,proto3" json:"expires_on,omitempty"`
OriginalFilename string `protobuf:"bytes,3,opt,name=original_filename,json=originalFilename,proto3" json:"original_filename,omitempty"`
Passcode string `protobuf:"bytes,4,opt,name=passcode,proto3" json:"passcode,omitempty"`
CurrentViews int64 `protobuf:"varint,5,opt,name=current_views,json=currentViews,proto3" json:"current_views,omitempty"`
MaxViews int64 `protobuf:"varint,6,opt,name=max_views,json=maxViews,proto3" json:"max_views,omitempty"`
}
func (x *File_Metadata) Reset() {
@ -1223,6 +1250,27 @@ func (x *File_Metadata) GetOriginalFilename() string {
return ""
}
func (x *File_Metadata) GetPasscode() string {
if x != nil {
return x.Passcode
}
return ""
}
func (x *File_Metadata) GetCurrentViews() int64 {
if x != nil {
return x.CurrentViews
}
return 0
}
func (x *File_Metadata) GetMaxViews() int64 {
if x != nil {
return x.MaxViews
}
return 0
}
type ListFilesResponse_ListFileInfo struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -1348,14 +1396,14 @@ var file_protos_ezshare_proto_rawDesc = []byte{
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@ -1366,160 +1414,172 @@ var file_protos_ezshare_proto_rawDesc = []byte{
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}
var (

View File

@ -21,6 +21,9 @@ message File {
google.protobuf.Timestamp uploaded_on = 1;
google.protobuf.Timestamp expires_on = 2;
string original_filename = 3;
string passcode = 4;
int64 current_views = 5;
int64 max_views = 6;
};
Metadata metadata = 3;
@ -33,6 +36,8 @@ message UploadFileRequest {
bytes data = 1;
string original_filename = 2;
google.protobuf.Timestamp expires_on = 3;
int64 max_views = 4;
bool with_passcode = 5;
}
message UploadFileResponse {
string id = 1;
@ -42,6 +47,7 @@ message UploadFileResponse {
// Get
message GetFileRequest {
string id = 1;
string passcode = 2;
}
message GetFileResponse {
File file = 1;

View File

@ -3,11 +3,15 @@ package server
import (
"context"
"fmt"
"time"
"gitea.benny.dog/torjus/ezshare/pb"
"gitea.benny.dog/torjus/ezshare/store"
"github.com/dustin/go-humanize"
"github.com/google/uuid"
"go.uber.org/zap"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
type GRPCFileServiceServer struct {
@ -24,14 +28,27 @@ func NewGRPCFileServiceServer(store store.FileStore) *GRPCFileServiceServer {
func (s *GRPCFileServiceServer) UploadFile(ctx context.Context, req *pb.UploadFileRequest) (*pb.UploadFileResponse, error) {
var f pb.File
f.Data = req.GetData()
f.Metadata = &pb.File_Metadata{}
f.Metadata.OriginalFilename = req.OriginalFilename
if req.WithPasscode {
f.Metadata.Passcode = uuid.Must(uuid.NewRandom()).String()
}
f.Metadata.ExpiresOn = req.ExpiresOn
f.Metadata.MaxViews = req.MaxViews
id, err := s.store.StoreFile(&f)
if err != nil {
s.Logger.Warnw("Error storing file.", "error", err)
return nil, err
}
fileUrl := fmt.Sprintf("%s/files/%s", s.Hostname, id)
if req.WithPasscode {
fileUrl = fmt.Sprintf("%s?passcode=%s", fileUrl, f.Metadata.Passcode)
}
s.Logger.Infow("Received file.", "id", id, "size", humanize.Bytes(uint64(len(f.Data))))
return &pb.UploadFileResponse{Id: id, FileUrl: fmt.Sprintf("%s/files/%s", s.Hostname, id)}, nil
return &pb.UploadFileResponse{Id: id, FileUrl: fileUrl}, nil
}
func (s *GRPCFileServiceServer) GetFile(ctx context.Context, req *pb.GetFileRequest) (*pb.GetFileResponse, error) {
@ -39,8 +56,40 @@ func (s *GRPCFileServiceServer) GetFile(ctx context.Context, req *pb.GetFileRequ
if err != nil {
return nil, err
}
s.Logger.Infow("Sending file to client.", "id", f.FileId, "size", humanize.Bytes(uint64(len(f.Data))))
// Check if expired, viewed too many times, or needs passcode
if f.Metadata.ExpiresOn != nil {
if f.Metadata.ExpiresOn.AsTime().Before(time.Now()) {
if err := s.store.DeleteFile(f.FileId); err != nil {
s.Logger.Warnw("Error deleting expired file.", "error", err)
}
return nil, status.Error(codes.NotFound, "no such file")
}
}
// Check if requires passcode
if f.Metadata.Passcode != "" {
if f.Metadata.Passcode != req.Passcode {
return nil, status.Error(codes.PermissionDenied, "needs passcode")
}
}
// Too many views
if f.Metadata.MaxViews != 0 {
if f.Metadata.CurrentViews >= f.Metadata.MaxViews {
if err := s.store.DeleteFile(f.FileId); err != nil {
s.Logger.Warnw("Error deleting expired file.", "error", err)
}
return nil, status.Error(codes.NotFound, "no such file")
}
}
f.Metadata.CurrentViews++
if _, err := s.store.StoreFile(f); err != nil {
s.Logger.Warnw("Error storing updated file.", "error", err)
}
s.Logger.Infow("Sending file to client.", "id", f.FileId, "size", humanize.Bytes(uint64(len(f.Data))))
return &pb.GetFileResponse{File: f}, nil
}

View File

@ -4,6 +4,7 @@ import (
"encoding/json"
"fmt"
"net/http"
"time"
"gitea.benny.dog/torjus/ezshare/store"
"github.com/go-chi/chi/v5"
@ -72,11 +73,51 @@ func (s *HTTPServer) FileHandler(w http.ResponseWriter, r *http.Request) {
return
}
// Check if expired, passcode required, or other reasons for not sending file
// To many views
if f.Metadata.MaxViews != 0 {
if f.Metadata.CurrentViews >= f.Metadata.MaxViews {
// File has been viewed max amount of times - delete
s.Logger.Infow("File has been viewed too many times.", "id", id)
if err := s.store.DeleteFile(id); err != nil {
s.Logger.Warnw("Error deleting file.", "id", id)
}
WriteErrorResponse(w, http.StatusNotFound, "file viewed too many times")
return
}
}
// Expired
if f.Metadata.ExpiresOn != nil {
if f.Metadata.ExpiresOn.AsTime().Before(time.Now()) {
// File has expired
s.Logger.Infow("File has been expired.", "id", id)
if err := s.store.DeleteFile(id); err != nil {
s.Logger.Warnw("Error deleting file.", "id", id)
}
WriteErrorResponse(w, http.StatusNotFound, "file not found")
return
}
}
// Passcode required
if f.Metadata.Passcode != "" {
if f.Metadata.Passcode != r.URL.Query().Get("passcode") {
WriteErrorResponse(w, http.StatusUnauthorized, "wrong passcode")
return
}
}
w.Header().Add("Content-Type", http.DetectContentType(f.Data))
if _, err := w.Write(f.Data); err != nil {
s.Logger.Warnw("Error sending file.", "error", err, "remote_addr", r.RemoteAddr)
}
s.Logger.Infow("Sent file.", "remote_addr", r.RemoteAddr)
f.Metadata.CurrentViews++
if _, err := s.store.StoreFile(f); err != nil {
s.Logger.Warnw("Error storing updated file.", "error", err)
}
}
func WriteErrorResponse(w http.ResponseWriter, status int, message string) {