/
creativeuploader.go
170 lines (135 loc) · 3.87 KB
/
creativeuploader.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
package main
import (
"archive/zip"
"bytes"
"encoding/base64"
"encoding/json"
"flag"
"fmt"
"image"
"io"
"net/http"
"strings"
"time"
_ "image/gif"
_ "image/jpeg"
_ "image/png"
"github.com/facebookgo/grace/gracehttp"
"github.com/julienschmidt/httprouter"
)
type Creative struct {
Name string `json:"name"`
Content string `json:"content"`
FileSize int64 `json:"filesize"`
Width int `json:"width"`
Height int `json:"height"`
Mime string `json:"mime"`
}
func upload(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
w.Header().Set("Access-Control-Allow-Origin", "*")
var response struct {
Files []Creative `json:"files"`
Error string `json:"error"`
}
if files, err := parseUpload(w, r); err != nil {
response.Error = fmt.Sprint(err)
} else {
response.Files = files
}
iframe := ps.ByName("iframe")
if iframe == "" {
w.Header().Set("Content-Type", "application/json")
if err := json.NewEncoder(w).Encode(response); err != nil {
w.Write([]byte(`{"error":"could not encode json"}`))
}
} else {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
if b, err := json.Marshal(response); err != nil {
w.Write([]byte(`{"error":"could not encode json"}`))
} else {
w.Write([]byte(`'<!DOCTYPE html><html lang=en><head><meta charset=utf-8><script type="text/javascript">window.response = "`))
w.Write(b)
w.Write([]byte(`"';</script></head><body></body></html>`))
}
}
}
func parseUpload(w http.ResponseWriter, r *http.Request) ([]Creative, error) {
file, header, err := r.FormFile("file")
if err != nil {
return nil, err
}
defer file.Close()
base64Buffer := bytes.Buffer{}
base64Writer := base64.NewEncoder(base64.StdEncoding, &base64Buffer)
size, _ := io.Copy(base64Writer, file)
if err := base64Writer.Close(); err != nil {
return nil, fmt.Errorf("Error reading file: %v", err)
}
files := make([]Creative, 0)
if strings.ToLower(header.Filename[len(header.Filename)-4:]) == ".zip" {
if _, err := file.Seek(0, 0); err != nil {
return nil, err
}
z, err := zip.NewReader(file, size)
if err != nil {
return nil, fmt.Errorf("Could not read ZIP file: %v", err)
}
for _, f := range z.File {
zipped, err := f.Open()
if err != nil {
return nil, fmt.Errorf("Could not open file in ZIP: %v", err)
}
defer zipped.Close()
w, h, mime := getImageInfo(zipped)
base64Buffer.Reset()
size, err := io.Copy(base64Writer, zipped)
if err != nil {
return nil, fmt.Errorf("Could not read ZIP: %v", err)
}
if err := base64Writer.Close(); err != nil {
return nil, fmt.Errorf("Could not finish ZIP: %v", err)
}
files = append(files, Creative{f.Name, base64Buffer.String(), size, w, h, mime})
}
} else {
if _, err := file.Seek(0, 0); err != nil { // Seek to begin
return nil, err
}
w, h, mime := getImageInfo(file)
files = append(files, Creative{header.Filename, base64Buffer.String(), size, w, h, mime})
}
return files, nil
}
func getImageInfo(file io.Reader) (int, int, string) {
img, mime, err := image.DecodeConfig(file)
if err != nil {
return 0, 0, "application/unknown"
}
return img.Width, img.Height, "image/" + mime
}
type notFound struct {
http.Handler
}
func (n notFound) ServeHTTP(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Not a valid request: %s %s", r.Method, r.URL.Path)
}
func main() {
bind := flag.String("bind", "0.0.0.0:5241", "Bind to this IP:port combination")
flag.Parse()
// Set routes
router := httprouter.New()
router.HandleMethodNotAllowed = false
router.POST("/upload", upload)
router.NotFound = notFound{}
s := &http.Server{
Addr: *bind,
Handler: router,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1024 * 6, // 4k cookie + 2k http request
}
s.SetKeepAlivesEnabled(true)
if err := gracehttp.Serve(s); err != nil {
panic(err)
}
}