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authorPacien2013-09-08 20:08:01 +0200
committerPacien2013-09-08 20:10:03 +0200
commit1271e4c3612493bf3bd6d0035017815d10599432 (patch)
tree0609a634566119f7f2fdcb298f22936fec709b3f
parent8505a6e39fe92a9f9f01261d52cdba6c5f789995 (diff)
downloaddiffusion-master.tar.gz
First versionHEADmaster
-rw-r--r--README.md7
-rw-r--r--main.go118
2 files changed, 125 insertions, 0 deletions
diff --git a/README.md b/README.md
index 0bb4db0..efa5cfb 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
1Diffusion 1Diffusion
2========= 2=========
3
4Diffusion is a simple websocket broadcaster written in Go.
5
6Everything sent on /b/{{channel}} is broadcast to every connection on /{{channel}}.
7
8Broadcaster and client accesses can be restricted by a key for each and they will have to connect to /b/{{channel}}?{{broadcaster key}} or /{{channel}}?{{client key}}.
9These keys are definable using command line arguments when starting the program. \ No newline at end of file
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..bea50be
--- /dev/null
+++ b/main.go
@@ -0,0 +1,118 @@
1/*
2
3 This file is part of Diffusion (https://github.com/Pacien/Diffusion)
4
5 Permission is hereby granted, free of charge, to any person obtaining a copy
6 of this software and associated documentation files (the "Software"), to deal
7 in the Software without restriction, including without limitation the rights
8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 copies of the Software, and to permit persons to whom the Software is
10 furnished to do so, subject to the following conditions:
11
12 The above copyright notice and this permission notice shall be included in
13 all copies or substantial portions of the Software.
14
15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 THE SOFTWARE.
22
23*/
24
25// Diffusion
26package main
27
28import (
29 "code.google.com/p/go.net/websocket"
30 "flag"
31 "log"
32 "net/http"
33 "strings"
34)
35
36var broadcastKey = flag.String("broadcastKey", "", "Secret key for braodcasting.")
37var clientKey = flag.String("revieveKey", "", "Secret key for recieving.")
38
39func splitRequest(ws *websocket.Conn, base string) (channelName string, arguments []string) {
40 request := strings.Split(ws.Request().RequestURI[len(base):], "?")
41 channelName = request[0]
42 if len(request) > 1 {
43 arguments = strings.Split(request[1], "&")
44 }
45 return
46}
47
48func auth(submittedKey string, key *string) bool {
49 if *key == "" || submittedKey == *key {
50 return true
51 }
52 return false
53}
54
55var clients = make(map[string]map[int]chan []byte)
56
57func broadcastHandler(ws *websocket.Conn) {
58
59 channelName, arguments := splitRequest(ws, "/b/")
60
61 log.Println("New broadcaster on #" + channelName)
62
63 if !auth(arguments[0], broadcastKey) {
64 return
65 }
66
67 var message = make([]byte, 512)
68
69 for {
70 ws.Read(message)
71
72 log.Println("#" + channelName + ": " + string(message))
73
74 for _, client := range clients[channelName] {
75 client <- message
76 }
77 }
78
79}
80
81func clientHandler(ws *websocket.Conn) {
82
83 channelName, arguments := splitRequest(ws, "/")
84
85 log.Println("New client on #" + channelName)
86
87 if !auth(arguments[0], clientKey) {
88 return
89 }
90
91 var channel = make(chan []byte)
92
93 clientID := len(clients[channelName])
94 if clientID < 1 {
95 clients[channelName] = make(map[int]chan []byte)
96 }
97 clients[channelName][clientID] = channel
98 defer delete(clients[channelName], clientID)
99
100 for {
101 ws.Write(<-channel)
102 }
103
104}
105
106func main() {
107
108 flag.Parse()
109
110 http.Handle("/b/", websocket.Handler(broadcastHandler))
111 http.Handle("/", websocket.Handler(clientHandler))
112
113 err := http.ListenAndServe(":8080", nil)
114 if err != nil {
115 panic("ListenAndServe: " + err.Error())
116 }
117
118}