1/*
2Copyright 2011 The Perkeep Authors
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8     http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package server
18
19import (
20	"io"
21	"io/ioutil"
22	"log"
23	"net/http"
24
25	"go4.org/types"
26	"perkeep.org/internal/httputil"
27	"perkeep.org/pkg/blob"
28	"perkeep.org/pkg/schema"
29)
30
31// uploadHelperResponse is the response from serveUploadHelper.
32type uploadHelperResponse struct {
33	Got []*uploadHelperGotItem `json:"got"`
34}
35
36type uploadHelperGotItem struct {
37	FileName string         `json:"filename"`
38	ModTime  types.Time3339 `json:"modtime"`
39	FormName string         `json:"formname"`
40	FileRef  blob.Ref       `json:"fileref"`
41}
42
43func (ui *UIHandler) serveUploadHelper(rw http.ResponseWriter, req *http.Request) {
44	ctx := req.Context()
45	if ui.root.Storage == nil {
46		httputil.ServeJSONError(rw, httputil.ServerError("No BlobRoot configured"))
47		return
48	}
49
50	mr, err := req.MultipartReader()
51	if err != nil {
52		httputil.ServeJSONError(rw, httputil.ServerError("reading body: "+err.Error()))
53		return
54	}
55
56	var got []*uploadHelperGotItem
57	var modTime types.Time3339
58	for {
59		part, err := mr.NextPart()
60		if err == io.EOF {
61			break
62		}
63		if err != nil {
64			httputil.ServeJSONError(rw, httputil.ServerError("reading body: "+err.Error()))
65			break
66		}
67		if part.FormName() == "modtime" {
68			payload, err := ioutil.ReadAll(part)
69			if err != nil {
70				log.Printf("ui uploadhelper: unable to read part for modtime: %v", err)
71				continue
72			}
73			modTime = types.ParseTime3339OrZero(string(payload))
74			continue
75		}
76		fileName := part.FileName()
77		if fileName == "" {
78			continue
79		}
80		br, err := schema.WriteFileFromReaderWithModTime(ctx, ui.root.Storage, fileName, modTime.Time(), part)
81		if err != nil {
82			httputil.ServeJSONError(rw, httputil.ServerError("writing to blobserver: "+err.Error()))
83			return
84		}
85		got = append(got, &uploadHelperGotItem{
86			FileName: part.FileName(),
87			ModTime:  modTime,
88			FormName: part.FormName(),
89			FileRef:  br,
90		})
91	}
92
93	httputil.ReturnJSON(rw, &uploadHelperResponse{Got: got})
94}
95