/
main.go
178 lines (152 loc) · 4.51 KB
/
main.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
171
172
173
174
175
176
177
178
package main
import (
"errors"
dontlog "log"
"net"
"os"
"os/signal"
"strings"
"gopkg.in/alecthomas/kingpin.v2"
"github.com/subparlabs/bonjourno/inputs"
"github.com/subparlabs/bonjourno/log"
"github.com/subparlabs/bonjourno/service"
)
var (
// Data Sources
say = kingpin.Arg("static text", "Create a share with this text").Strings()
file = kingpin.Flag("file", "Read messages from this file, periodically updating").ExistingFile()
url = kingpin.Flag("url", "Download data from a url").String()
// How to slice the data
words = kingpin.Flag("words", "Go through whole text, instead of lines").Bool()
csvField = kingpin.Flag("csv-field", "Iterate this field from csv data").Default("-1").Int()
// How to choose messages
random = kingpin.Flag("random", "Randomize messages, instead of sequential").Bool()
// Message options
interval = kingpin.Flag("interval", "Update interval for multiple strings (not watch, for ex), like 1s or 5m").Short('i').Default("5m").Duration()
prefix = kingpin.Flag("prefix", "Prefix all messages with this string").String()
lower = kingpin.Flag("lower-case", "Lowercase messages").Bool()
upper = kingpin.Flag("upper-case", "Uppercase messages").Bool()
mixedCase = kingpin.Flag("mixed-case", "Mixedcase messages").Bool()
leet = kingpin.Flag("l33t", "Leet speak").Bool()
host = kingpin.Flag("host", "Host to broadast for the service").String()
port = kingpin.Flag("port", "Port to broadast for the service").Int()
)
func main() {
kingpin.Parse()
msgChan, err := buildStream()
if err != nil || msgChan == nil {
kingpin.FatalUsage("Failed to create input stream: " + err.Error())
}
// Disable regular logging, cuz bonjour logs an error that isn't, and it's
// confusing.
dontlog.SetOutput(NullWriter{})
if *host == "" {
*host = getLocalIP()
}
if *port == 0 {
// TODO: run a server that sends the same text on TCP conn
*port = 45897
}
serv, err := service.New(*host, *port, msgChan)
if err != nil || serv == nil {
log.Panic("Failed to create service", "err", err)
}
// Watch for signal to clean up before we exit
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt, os.Kill)
<-signals
log.Info("Shutting down")
serv.Stop()
log.Info("Stopped service")
}
func buildStream() (<-chan string, error) {
var source inputs.DataSource
var err error
if *url != "" {
log.Info("Reading messages from a url", "url", *url)
source, err = inputs.Download(*url)
if err != nil {
return nil, err
}
} else if *file != "" {
log.Info("Reading messages from file", "file", *file)
source, err = inputs.FileWatcher(*file)
if err != nil {
return nil, err
}
} else if len(*say) > 0 {
log.Info("Using a static message", "msg", *say)
source, err = inputs.StaticText(strings.Join(*say, " "))
if err != nil {
return nil, err
}
}
if source == nil {
return nil, errors.New("No source of data specified")
}
var builder inputs.MessageBuilder
if *csvField >= 0 {
log.Info("Iterating csv values", "field", *csvField)
builder = inputs.CSVField(*csvField, source)
} else if *words {
log.Info("Iterating words")
builder = inputs.WordGroups(source)
} else {
log.Info("Iterating lines")
builder = inputs.Lines(source)
}
var chooser inputs.MessageChooser
if *random {
log.Info("Randomizing order")
chooser = inputs.RandomMessageChooser(builder)
} else {
log.Info("Sequential order")
chooser = inputs.SequentialMessageChooser(builder)
}
msgChan := inputs.RateLimit(*interval,
inputs.LimitSize(40,
inputs.Cleanup(
chooser)))
// Optional filters
if *prefix != "" {
msgChan = inputs.Prefix(*prefix, msgChan)
}
if *leet {
msgChan = inputs.LeetSpeak(msgChan)
} else if *mixedCase {
msgChan = inputs.MixedCase(msgChan)
} else if *lower {
msgChan = inputs.LowerCase(msgChan)
} else if *upper {
msgChan = inputs.UpperCase(msgChan)
}
return msgChan, nil
}
func getLocalIP() string {
bestSoFar := "127.0.0.1"
if addresses, err := net.InterfaceAddrs(); err == nil {
for _, address := range addresses {
switch addr := address.(type) {
case *net.IPNet:
if !addr.IP.IsLoopback() {
if addr4 := addr.IP.To4(); addr4 != nil {
return addr4.String()
}
bestSoFar = addr.IP.String()
}
case *net.IPAddr:
if !addr.IP.IsLoopback() {
if addr4 := addr.IP.To4(); addr4 != nil {
return addr4.String()
}
bestSoFar = addr.IP.String()
}
}
}
}
return bestSoFar
}
type NullWriter struct{}
func (w NullWriter) Write(p []byte) (n int, err error) {
return len(p), nil
}