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
|
package main
import (
"crypto/sha256"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"path/filepath"
"time"
"io"
)
var p_conf = Config{
host: "localhost",
port: "8000",
paste_dir: "./pastes",
templ_dir: "./tmpl",
log_fname: "./binit.log",
}
func handle_get_paste(w http.ResponseWriter, r *http.Request) {
var paste_name, orig_name string
var err error
orig_name = filepath.Clean(r.URL.Path)
paste_name = p_conf.paste_dir + "/" + orig_name
orig_IP := r.RemoteAddr
log.Printf("Received GET from %s for '%s'\n", orig_IP, orig_name)
// The default is to serve index.html
if (orig_name == "/") || (orig_name == "/index.html") {
http.ServeFile(w, r, p_conf.templ_dir + "/index.html")
} else {
// otherwise, if the requested paste exists, we serve it...
if _, err = os.Stat(paste_name); err == nil && orig_name != "./" {
http.ServeFile(w, r, paste_name)
} else {
// otherwise, we give say we didn't find it
fmt.Fprintf(w, "Paste '%s' not found\n", orig_name)
return
}
}
}
func handle_put_paste(w http.ResponseWriter, r *http.Request) {
if err := r.ParseForm(); err != nil {
// Invalid POST -- let's serve the default file
http.ServeFile(w, r, p_conf.templ_dir + "/index.html")
} else {
h := sha256.New()
req_body := r.PostForm
orig_IP := r.RemoteAddr
log.Printf("Received new POST from %s\n", orig_IP)
// get title, body, and time
title := req_body.Get("title")
paste := req_body.Get("paste")
now := time.Now().String()
// format content
content := fmt.Sprintf("# Title: %s\n# Pasted: %s\n------------\n%s", title, now, paste)
// ccompute the sha256 hash using title, body, and time
h.Write([]byte(content))
paste_hash := fmt.Sprintf("%x", h.Sum(nil))
log.Printf(" `-- hash: %s\n", paste_hash)
paste_dir := p_conf.paste_dir + "/"
// Now we save the file
for i := 0; i < len(paste_hash)-16; i++ {
paste_name := paste_hash[i:i+16]
if _, err := os.Stat(paste_dir + paste_name); os.IsNotExist(err) {
// The file does not exist, so we can create it
if err := ioutil.WriteFile(paste_dir+ paste_name, []byte(content), 0644); err == nil {
// and then we return the URL:
log.Printf(" `-- saving paste to : %s", paste_dir + paste_name)
hostname := r.Host
if show := req_body.Get("show"); show != "" {
fmt.Fprintf(w, "%s/%s", hostname, paste_name)
return
} else{
fmt.Fprintf(w, "<html><body>Link: <a href='%s'>%s</a></body></html>",
paste_hash[i:i+16], paste_hash[i:i+16])
return
}
} else {
fmt.Fprintf(w, "Cannot create the paste.. Sorry!\n")
return
}
}
}
}
}
func req_handler(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "GET":
handle_get_paste(w, r)
case "POST":
handle_put_paste(w, r)
default:
http.NotFound(w, r)
}
}
func main() {
parse_config("binit.cfg", &p_conf)
f, err := os.OpenFile(p_conf.log_fname, os.O_APPEND | os.O_CREATE | os.O_RDWR, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "Error opening logfile: %s. Exiting\n", p_conf.log_fname)
os.Exit(1)
}
log.SetOutput(io.Writer(f))
log.SetPrefix("[binit]: ")
log.SetFlags(log.Ldate | log.Ltime | log.Lmicroseconds)
log.Println("Binit version 0.1 -- Starting ")
log.Printf(" + listening on: %s:%s\n", p_conf.host, p_conf.port )
log.Printf(" + paste_dir: %s\n", p_conf.paste_dir)
log.Printf(" + templ_dir: %s\n", p_conf.templ_dir)
http.HandleFunc("/", req_handler)
log.Fatal(http.ListenAndServe(p_conf.host + ":" + p_conf.port, nil))
}
|
