\u6587\u7ae0\u6765\u6e90http:\/\/tchen.me\/posts\/2014-01-27-golang-chatroom.html<\/p>\n
\u6700\u8fd1\u5728team\u5185\u90e8\u57f9\u8badgolang\uff0c\u76ee\u6807\u662f\u770b\u770bgolang\u80fd\u5426\u88abC\u5de5\u7a0b\u5e08\u5feb\u901f\u638c\u63e1\u3002\u6211\u5b9a\u4e86\u4e2a\u4e00\u4e2a\u6708\uff0c\u5171\u8ba120\u5c0f\u65f6\u7684\u57f9\u8bad\u8ba1\u5212\uff0c\u9996\u5148\u82b110\u4e2a\u5c0f\u65f6\uff08\u4e24\u5468\uff0c\u6bcf\u59291\u5c0f\u65f6\uff09\u8ba9\u5927\u5bb6\u638c\u63e1golang\u7684\u57fa\u672c\u8981\u7d20\uff0c\u80fd\u5199\u4e00\u4e9b\u5165\u95e8\u7ea7\u7684\u7a0b\u5e8f\uff0c\u4e4b\u540e\u518d\u82b1\u4e24\u5468\u65f6\u95f4\u505a\u4e00\u4e2a1000\u884c\u4ee3\u7801\u89c4\u6a21\u7684Proof of concept\u9879\u76ee\u3002\u4e3a\u4e86\u80fd\u5728\u57f9\u8bad\u7684slides\u4e0a\u76f4\u63a5\u8fd0\u884cgo code\uff0c\u6211\u505a\u4e86\u4e2a\u7b80\u5355\u7684 coderunnerd\uff0c\u53ef\u4ee5\u63a5\u53d7websocket\u4f20\u8fc7\u6765\u7684code\uff0c\u7f16\u8bd1\u8fd0\u884c\u518d\u628astdout\u8fd4\u56de\u7ed9websocket\uff0c\u4e3a\u4e86\u66f4\u6e05\u6670\u5730\u8bf4\u660egoroutine\u548cchan\u7684\u4f7f\u7528\uff0c\u4ee5\u53cagolang\u7684\u4e00\u4e9bbest practice\uff0c\u6211\u5206\u9636\u6bb5\u5199\u4e86\u4e2a chatroom\u3002\u672c\u6587\u4ecb\u7ecd\u4e00\u4e0b\u5982\u4f55\u4f7f\u7528goroutine\u548cchan\u6765\u505a\u4e00\u4e2a\u7b80\u5355\u7684\u804a\u5929\u5ba4\u3002<\/p>\n
\u9700\u6c42
\n\u804a\u5929\u5ba4\u7684\u9700\u6c42\u5f88\u7b80\u5355\uff1a<\/p>\n
\u670d\u52a1\u5668\u76d1\u542c\u67d0\u4e2a\u7aef\u53e3\uff0c\u5ba2\u6237\u7aef\u53ef\u8fde\u63a5\u5e76\u5f00\u59cb\u804a\u5929\u3002
\n\u4efb\u4f55\u5ba2\u6237\u7aef\u7684\u53d1\u8a00\u90fd\u4f1a\u88ab\u5e7f\u64ad\u7ed9\u6240\u6709\u5ba2\u6237\u7aef\u3002
\n\u5ba2\u6237\u7aef\u53ef\u4ee5\u4e3a\u81ea\u5df1\u8bbe\u5b9a\u540d\u5b57\u6216\u8005\u6267\u884c\u4e00\u4e9b\u804a\u5929\u547d\u4ee4\u3002
\n\u8bbe\u8ba1\u4e0e\u5b9e\u73b0
\n\u57fa\u672c\u60f3\u6cd5
\n\u670d\u52a1\u5668\uff08Server\uff09\uff1a<\/p>\n
Server accept\u4e0b\u6765\u7684connection\u88ab\u5b58\u5728\u4e00\u4e2a\u6570\u636e\u7ed3\u6784Client\u4e2d\uff0c\u5e76\u4ee5connection\u4e3akey\uff0cClient\u4e3avalue\uff0c\u5b58\u5728map\u91cc\u3002
\n\u6bcf\u4e2aClient\u90fd\u6709\u81ea\u5df1\u7684goroutine\u53bb\u63a5\u53d7\u548c\u53d1\u9001\u6d88\u606f\u3002Client\u548cServer\u4e4b\u95f4\u901a\u8fc7channel\u6765\u4f20\u9012\u6d88\u606f\u3002
\n\u5ba2\u6237\u7aef\uff08Client\uff09\uff1a<\/p>\n
\u53d1\u9001\u548c\u63a5\u6536\u90fd\u6709\u5404\u81ea\u7684goroutine\uff0c\u901a\u8fc7channel\u548cstdin\/stdout\u4ea4\u4e92
\n\u5b9e\u73b0
\n\u6240\u6709chat\u76f8\u5173\u7684\u903b\u8f91\u90fd\u88ab\u5c01\u88c5\u5728 chat package\u91cc\uff0cclient\u548cserver\u7684cli\u53ea\u8d1f\u8d23\u5c06ui\u548cchat\u7c98\u5408\u8d77\u6765\u3002<\/p>\n
\u9996\u5148\uff0c\u662f\u6838\u5fc3\u7684\u6570\u636e\u7ed3\u6784\uff1a<\/p>\n
type Message chan string<\/p>\n
type Client struct {
\n conn net.Conn
\n incoming Message
\n outgoing Message
\n reader *bufio.Reader
\n writer *bufio.Writer
\n quiting chan net.Conn
\n name string
\n}
\nClient \u662f\u4e00\u4e2a\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u90fd\u5171\u4eab\u7684\u6570\u636e\u7ed3\u6784\u3002conn\u662f\u5efa\u7acb\u7684\u8fde\u63a5\uff0creader\/writer\u662fconn\u4e0a\u7684bufio\u3002Client\u4e0e\u5916\u754c\u7684\u63a5\u53e3\u662fincoming\/outgoing\u4e24\u4e2achannel\uff0c\u5373\uff1aServer \u4f1a\u628a\u8981\u53d1\u9001\u7684\u5185\u5bb9 push \u5230 outgoing channel \u91cc\uff0c\u4f9bwriter\u53bb\u5199\uff1b\u800c\u4ecereader\u8bfb\u5165\u7684\u6570\u636e\u4f1a push \u5230 incoming channel \u91cc\uff0c\u4f9b Server \u8bfb\u3002<\/p>\n
\u6bcf\u4e2a Client \u6709\u81ea\u5df1\u7684\u540d\u5b57\uff0c\u670d\u52a1\u5668\u7aef\u4ee3\u7801\u4f1a\u4f7f\u7528\u8fd9\u4e2a\u540d\u5b57\uff08\u5ba2\u6237\u7aef\u4ee3\u7801\u4e0d\u4f1a\u4f7f\u7528\uff09\u3002<\/p>\n
type Token chan int
\ntype ClientTable map[net.Conn]*Client<\/p>\n
type Server struct {
\n listener net.Listener
\n clients ClientTable
\n tokens Token
\n pending chan net.Conn
\n quiting chan net.Conn
\n incoming Message
\n outgoing Message
\n}
\nServer \u4fdd\u5b58\u4e00\u5f20 ClientTable\u3002\u6bcf\u4e2a accept \u5230\u7684 conn \u4f1a push \u8fdb pending channel\uff0c\u7b49\u5f85\u521b\u5efaclient\u3002Server\u6709 incoming \/ outgoing \u4e24\u4e2a channel\uff0c\u5206\u522b\u548c client \u7684 incoming \/ outgoing \u5173\u8054\u3002<\/p>\n
Server \u6709\u4e00\u7ec4 tokens\uff0c\u51b3\u5b9a\u4e86\u4e00\u4e2aServer\u6700\u591a\u80fd\u88c5\u591a\u5c11Client\uff08\u907f\u514dServer overloading\uff09\u3002<\/p>\n
\u4e0b\u9762\u770b Server \u7684\u521b\u5efa\u6d41\u7a0b\uff1a<\/p>\n
const (
\n MAXCLIENTS = 50
\n)<\/p>\n
func CreateServer() *Server {
\n server := &Server{
\n clients: make(ClientTable, MAXCLIENTS),
\n tokens: make(Token, MAXCLIENTS),
\n pending: make(chan net.Conn),
\n quiting: make(chan net.Conn),
\n incoming: make(Message),
\n outgoing: make(Message),
\n }
\n server.listen()
\n return server
\n}
\n\u5f88\u7b80\u5355\uff0c\u65e0\u987b\u591a\u8bf4\u3002server.Listen() \u5b9e\u73b0\u5982\u4e0b\uff1a<\/p>\n
func (self *Server) listen() { server := CreateServer() } package main<\/p>\n import ( func main() { conn, err := net.Dial(“tcp”, os.Args[1])<\/p>\n if err != nil { defer conn.Close() client := CreateClient(conn)<\/p>\n go func() { for { } \u279c chatroom git:(master) .\/bin\/chatserver :5555 \u279c chatroom git:(master) .\/bin\/chatclient :5555 \u4ee5\u4e0a\u4ee3\u7801\u80fd\u6b63\u786e\u8fd0\u884c\uff0c\u4e0d\u8fc7\u8fd8\u6709\u4e0d\u5c11\u95ee\u9898\uff0c\u6bd4\u5982 server stop \u65f6 goroutine \u5e76\u672a\u6b63\u786e cleanup\u3002\u4f46\u5bf9\u4e8e\u7406\u89e3 goroutine \u548c chan \u6765\u8bf4\uff0c\u4e0d\u5931\u4e3a\u4e00\u4e2a\u5f88\u597d\u7684\u4f8b\u5b50\u3002<\/p>\n Lessons learnt \u4f8b\u5b50\uff1a<\/p>\n \u279c chatroom git:(master) go test .\/chat \u53e6\u5916\u4e00\u79cd\u505a\u6cd5\u662f\u5728\u8bfb\u5199\u4e24\u4e2a\u9700\u8981\u540c\u6b65\u7684\u5730\u65b9\u4f7f\u7528 channel \u8fdb\u884c\u540c\u6b65\uff08\u8fd8\u8bb0\u5f97\u521a\u521a\u8bb2\u7684 token\uff09\u5427\uff1f<\/p>\n \u5982\u679c\u4f60\u5bf9 map \u7684 thread-safe \u611f\u5174\u8da3\uff0c\u53ef\u4ee5\u8bfb\u8bfb stackoverflow\u4e0a\u7684\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n \u901a\u8fc7close\u6765\u5411\u6240\u6709goroutine\u4f20\u9012\u7ec8\u6b62\u8baf\u606f package main<\/p>\n import ( const ( func main() { for i := 0; i < N; i++ {\n go func(name string) {\n for {\n select {\n case <-quit:\n fmt.Printf(\"clean up %s\\n\", name)\n return\n }\n }\n }(strconv.Itoa(i))\n }\n close(quit)\n\n for {\n time.Sleep(1 * time.Second)\n }\n}\n\u6211\u751f\u6210\u4e86 N \u4e2a goroutine\uff0c\u4f46\u53ea\u9700\u4f7f\u7528\u4e00\u4e2a close \u5c31\u53ef\u4ee5\u5c06\u5176\u5168\u90e8\u5173\u95ed\u3002\u5728 chatroom \u4ee3\u7801\u4e2d\uff0c\u5173\u95ed server \u65f6\uff0c\u4e5f\u53ef\u4ee5\u91c7\u7528\u76f8\u540c\u7684\u65b9\u6cd5\uff0c\u5173\u95ed\u6240\u6709\u7684 client \u4e0a\u7684 goroutine\u3002\n\n\u4e0b\u9762\u662f\u4e0a\u8ff0\u4ee3\u7801\u6267\u884c\u7684\u7ed3\u679c\uff1a\n\n\u279c terminate go run terminate.go\nclean up 0\nclean up 1\nclean up 2\nclean up 3\nclean up 4\nclean up 5\nclean up 6\nclean up 7\nclean up 8\nclean up 9\n\u5c3d\u53ef\u80fd\u628a\u4efb\u52a1\u5206\u5e03\u5728goroutine\u4e2d\n\u5982\u679c\u4f60\u6ca1\u6709\u770b\u8fc7 Rob Pike \u7684 Concurrency is not parallelism\uff0c\u5efa\u8bae\u4e00\u5b9a\u8981\u770b\uff0c\u4e0d\u7ba1\u4f60\u6709\u6ca1\u6709 golang \u7684 background\u3002Concurrency \u662f\u4f60\u5199\u8f6f\u4ef6\u7684\u4e00\u79cd\u8ffd\u6c42\uff0c\u548c\u662f\u5426\u5e76\u884c\u65e0\u5173\uff0c\u4f46\u548c\u6a21\u5757\u5316\uff0c\u7b80\u5355\uff0c\u4f18\u96c5\u6709\u5173\u3002\n\ngoroutine\u4e0d\u53ef\u505a\u65e0\u963b\u585e\u7684infinite loop\ngoroutine\uff0c\u81f3\u5c11\u5728 golang 1.2 \u53ca\u4e4b\u524d\u7684\u7248\u672c\uff0c\u90fd\u8fd0\u884c\u5728\u4e00\u4e2a cooperative multitasking \u7684 scheduler \u4e0a\u3002\u6240\u4ee5\u4f60\u8981\u4fdd\u8bc1\u4f60\u7684\u4efb\u4f55\u4e00\u4e2a infinite loop \u90fd\u8981\u6709\u53ef\u80fd\u88ab block \u4f4f\uff0c\u65e0\u8bba\u662f block \u5728 IO, chan, \u8fd8\u662f\u4e3b\u52a8 block \u5728 timer \u4e0a\uff0c\u603b\u4e4b\uff0cinfinite loop \u8981\u6709\u9000\u51fa\u673a\u5236\u3002\u521a\u624d\u7684\u4f8b\u5b50\u6211\u4eec\u7a0d\u5fae\u6539\u6539\uff1a\n\npackage main\n\nimport (\n \"fmt\"\n \"strconv\"\n \/\/\"time\"\n)\n\nconst (\n N = 10\n)\n\nfunc main() {\n quit := make(chan bool)\n\n for i := 0; i < N; i++ {\n go func(name string) {\n for {\n select {\n case <-quit:\n fmt.Printf(\"clean up %s\\n\", name)\n return\n }\n }\n }(strconv.Itoa(i))\n }\n close(quit)\n\n for {\n \/\/time.Sleep(1 * time.Second)\n }\n}\n\u4e4d\u4e00\u770b\uff0c\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u7684 gorountine\u5e94\u8be5\u80fd\u6536\u5230 close \u800c\u81ea\u6211\u5173\u95ed\u3002\u5728 main \u6267\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5934\u5341\u4e2a\u65b0\u521b\u5efa\u51fa\u6765\u7684 goroutine \u8fd8\u672a\u5f97\u5230\u8c03\u5ea6\u3002\u867d\u7136\u5728 main \u91cc\u6211\u4eec close \u4e86 quit\uff0c\u4f46\u7531\u4e8e\u63a5\u4e0b\u6765\u7684 dead loop \u4e00\u76f4\u4e0d\u91ca\u653e CPU\uff0c\u6240\u4ee5\u5176\u4ed6 goroutine \u4e00\u76f4\u5f97\u4e0d\u5230\u8c03\u5ea6\u3002\u8fd0\u884c\u7684\u8bdd\u6ca1\u6709\u4efb\u4f55\u8f93\u51fa\uff1a\n\n\u279c terminate go run terminate.go\n^Cexit status 2\n\u6211\u4eec\u7a0d\u7a0d\u6539\u6539\u8fd9\u4e2a\u7a0b\u5e8f\uff1a\n\npackage main\n\nimport (\n \"fmt\"\n \"runtime\"\n \"strconv\"\n \/\/\"time\"\n)\n\nconst (\n N = 10\n)\n\nfunc main() {\n runtime.GOMAXPROCS(2)\n quit := make(chan bool)\n\n for i := 0; i < N; i++ {\n go func(name string) {\n for {\n select {\n case <-quit:\n fmt.Printf(\"clean up %s\\n\", name)\n return\n }\n }\n }(strconv.Itoa(i))\n }\n close(quit)\n\n for {\n \/\/time.Sleep(1 * time.Second)\n }\n}\n\u73b0\u5728\u5141\u8bb8\u8fd9\u4e2a\u7a0b\u5e8f\u8fd0\u884c\u5728\u4e24\u4e2a thread \u4e0a\u3002\u8fd9\u6837\u5c31\u80fd\u6b63\u5e38\u8fd0\u884c\u4e86\u3002\u4f46\u5207\u8bb0\uff0c\u6ca1\u6709\u963b\u585e\u673a\u5236\u7684 infinite loop \u4e0d\u662f\u4e00\u4e2a\u597d\u7684\u8bbe\u8ba1\u3002\n\n\u279c terminate go run terminate1.go\nclean up 0\nclean up 1\nclean up 2\nclean up 3\nclean up 4\nclean up 5\nclean up 6\nclean up 7\nclean up 8\nclean up 9\n^Cexit status 2\nDRY (Don't Repeat Yourself)\n\u5199 chatroom \u65f6\uff0c\u6211\u4e0d\u65ad\u91cd\u6784\u4ee3\u7801\uff0c\u5176\u76ee\u7684\u5c31\u662f\u80fd\u8ba9\u4ee3\u7801\u5e72\u51c0\uff0c\u6f02\u4eae\u3002\u6bd4\u65b9\u6211\u7684\u4e00\u6b21 commit\uff1agit diff 39690d9 6851177\uff0c\u5c31\u662f\u5728\u505a test case refactor\u3002\n\nDRY \u7684\u524d\u63d0\u662f\u6709\u5b8c\u5584\u7684 test case\uff0c\u524d\u6587\u4e5f\u63d0\u5230\u3002\u8fd9\u662f\u9879\u76ee\u5185\u90e8\u7684 DRY\u3002\n\n\u53e6\u5916\u4e00\u79cd DRY \u7684\u65b9\u5f0f\u662f\uff08\u4ece\u6211\u9014\u5ba2\u5708\u7684\u524d\u540c\u4e8b @chenchiyuan \u90a3\u91cc\u5b66\u5230\u7684\uff09\uff1a\u5982\u679c\u4e24\u4e2a\u6216\u4ee5\u4e0a\u7684\u9879\u76ee\u4e2d\u90fd\u7528\u5230\u7c7b\u4f3c\u7ed3\u6784\u7684\u4ee3\u7801\uff0c\u5219\u8003\u8651\u5c06\u5176\u91cd\u6784\u5230\u4e00\u4e2a\u7b2c\u4e09\u65b9\u7684 lib \u91cc\u3002\u5728 chatroom \u4e2d\uff0c\u6709\u4e24\u5904\u8fd9\u6837\u7684\u91cd\u6784\uff0c\u91cd\u6784\u5728\u6211\u7684 goutil \u9879\u76ee\u4e2d\u3002\n\n\u7b2c\u4e00\u5904\u662f\u751f\u6210\u552f\u4e00\u6570\uff1a\n\npackage uniq\n\nvar (\n num = make(chan int)\n)\n\nfunc init() {\n go func() {\n for i := 0; ; i++ {\n num <- i\n }\n }()\n}\n\nfunc GetUniq() int {\n return <-num\n}\n\u7b2c\u4e8c\u5904\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\uff0c\u5c06\u5339\u914d\u7684\u7ed3\u679c\u653e\u5165\u4e00\u4e2a map \u7684 slice \u91cc\uff1a\n\npackage regex\n\nimport (\n \"regexp\"\n)\n\nconst (\n KVPAIR_CAP = 16\n)\n\ntype KVPair map[string]string\n\nfunc MatchAll(r *regexp.Regexp, data string) (captures []KVPair, ok bool) {\n captures = make([]KVPair, 0, KVPAIR_CAP)\n names := r.SubexpNames()\n length := len(names)\n matches := r.FindAllStringSubmatch(data, -1)\n for _, match := range matches {\n cmap := make(KVPair, length)\n for pos, val := range match {\n name := names[pos]\n if name != \"\" {\n cmap[name] = val\n }\n }\n captures = append(captures, cmap)\n }\n if len(captures) > 0 { \u6587\u7ae0\u6765\u6e90http:\/\/tchen.me\/posts\/2014-01-27-gol …<\/p>\n
\n go func() {
\n for {
\n select {
\n case message := <-self.incoming:\n self.broadcast(message)\n case conn := <-self.pending:\n self.join(conn)\n case conn := <-self.quiting:\n self.leave(conn)\n }\n }\n }()\n}\n\u8fd9\u662f\u4e00\u4e2a goroutine\uff0c\u505a\u4e09\u4ef6\u4e8b\uff1a\n\n\u5982\u679c self.incoming \u6536\u5230\u4e1c\u897f\uff0c\u5c06\u5176 broadcast \u51fa\u53bb\u3002\n\u5982\u679c\u6709\u65b0\u7684\u8fde\u63a5\uff0c\u5219\u5c06\u5176\u63a5\u5165\u5230\u804a\u5929\u5ba4\u3002\n\u5982\u679c\u4e00\u4e2a Client \u9000\u51fa\uff0c\u5219\u8fdb\u884c\u4e00\u4e9b\u6e05\u7406\u548c\u901a\u77e5\u3002\n\u6211\u4eec\u5148\u770b\u4e00\u4e2a\u65b0\u8fde\u63a5\u5982\u4f55\u52a0\u5165\u5230\u804a\u5929\u5ba4\uff1a\n\nfunc (self *Server) join(conn net.Conn) {\n client := CreateClient(conn)\n name := getUniqName()\n client.SetName(name)\n self.clients[conn] = client\n\n log.Printf(\"Auto assigned name for conn %p: %s\\n\", conn, name)\n\n go func() {\n for {\n msg := <-client.incoming\n log.Printf(\"Got message: %s from client %s\\n\", msg, client.GetName())\n\n if strings.HasPrefix(msg, \":\") {\n if cmd, err := parseCommand(msg); err == nil {\n if err = self.executeCommand(client, cmd); err == nil {\n continue\n } else {\n log.Println(err.Error())\n }\n } else {\n log.Println(err.Error())\n }\n }\n \/\/ fallthrough to normal message if it is not parsable or executable\n self.incoming <- fmt.Sprintf(\"%s says: %s\", client.GetName(), msg)\n }\n }()\n\n go func() {\n for {\n conn := <-client.quiting\n log.Printf(\"Client %s is quiting\\n\", client.GetName())\n self.quiting <- conn\n }\n }()\n}\n\u8fd9\u91cc\u5148\u901a\u8fc7\u8fde\u63a5\u5efa\u7acb Client \u6570\u636e\uff0c\u4e3a\u5176\u81ea\u52a8\u5206\u914d\u4e00\u4e2a\u552f\u4e00\u7684\u540d\u5b57\uff0c\u7136\u540e\u5c06\u5176\u52a0\u5165\u5230 ClientTable \u4e2d\u3002\u6ce8\u610f\u5728\u8fd9\u4e2a\u51fd\u6570\u91cc\u6bcf\u4e2a Client \u4f1a\u8fd0\u884c\u4e24\u4e2a goroutine\uff0c\u6211\u4eec\u5148\u8bb0\u4f4f\u8fd9\u4e00\u70b9\u3002\n\n\u7b2c\u4e00\u4e2a goroutine \u4ece Client \u7684 incoming channel \u4e2d\u62ff\u51fa message\uff0c\u5982\u679c\u662f\u547d\u4ee4\u7684\u8bdd\u5c31\u6267\u884c\u4e4b\uff0c\u5426\u5219\u5c06\u5176\u653e\u5165 Server \u7684 incoming channel\uff0c\u7b49\u5f85\u88ab broadcast \u51fa\u53bb\u3002\u4e4b\u524d Listen() \u65b9\u6cd5\u91cc\u6709\u5bf9\u5e94\u7684\u5904\u7406\uff1a\n\n case message := <-self.incoming:\n self.broadcast(message)\n\u987a\u624b\u770b\u4e00\u4e0b broadcast \u600e\u4e48\u505a\u7684\uff1a\n\nfunc (self *Server) broadcast(message string) {\n log.Printf(\"Broadcasting message: %s\\n\", message)\n for _, client := range self.clients {\n client.outgoing <- message\n }\n}\n\u7b2c\u4e8c\u4e2a goroutine \u4ece Client \u7684 quiting channel \u4e2d\u62ff\u51fa conn\uff0c\u653e\u5165 Server \u7684 quiting channel \u4e2d\uff0c\u7b49\u5f85\u5904\u7406\u67d0\u4e2a Client \u7684\u9000\u51fa\u3002\u540c\u6837\u5728 Listen() \u4e2d\u6709\u5904\u7406\uff1a\n\n case conn := <-self.quiting:\n self.leave(conn)\n\u987a\u624b\u4e5f\u770b\u770b Leave \u505a\u4e9b\u4ec0\u4e48\uff1a\n\nfunc (self *Server) leave(conn net.Conn) {\n if conn != nil {\n conn.Close()\n delete(self.clients, conn)\n }\n\n self.generateToken()\n}\nLeave \u91cc\u6709\u4e24\u4e2a\u5751\uff0c\u4e00\u4e2a\u662f\u4ece map \u91cc\u5220\u9664\u4e00\u4e2a key \u662f\u5426\u9700\u8981 synchronize\uff0c\u6211\u4eec\u653e\u5728\u4e0b\u9762\u7684\u300e\u5e76\u53d1\u4e0e\u540c\u6b65\u300f\u91cc\u8be6\u7ec6\u518d\u8868\uff1b\u53e6\u4e00\u4e2a\u5751\u662f generateToken()\uff0c\u9a6c\u4e0a\u5c31\u4f1a\u8bb2\u5230\u3002\n\n\u770b\u4e86\u8fd9\u4e48\u591a\u4ee3\u7801\u4e86\uff0c\u8fd8\u6ca1\u770b\u5230\u670d\u52a1\u5668\u5efa\u8fde\u7684\u4ee3\u7801\uff0c\u6709\u70b9\u8bf4\u4e0d\u8fc7\u53bb\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u770b Start\uff1a\n\nfunc (self *Server) Start(connString string) {\n self.listener, _ = net.Listen(\"tcp\", connString)\n\n log.Printf(\"Server %p starts\\n\", self)\n\n \/\/ filling the tokens\n for i := 0; i < MAXCLIENTS; i++ {\n self.generateToken()\n }\n\n for {\n conn, err := self.listener.Accept()\n\n if err != nil {\n log.Println(err)\n return\n }\n\n log.Printf(\"A new connection %v kicks\\n\", conn)\n\n self.takeToken()\n self.pending <- conn\n }\n}\n\u8fd9\u91cc generateToken \u53ca takeToken \u4e0e Leave \u91cc\u7684 generateToken \u547c\u5e94\u3002\u8fd9\u4e9b\u4ee3\u7801\u5bf9\u5e94\u4e00\u4e2a\u9690\u5f0f\u9700\u6c42\uff1a\u670d\u52a1\u5668\u4e0d\u53ef\u8fc7\u8f7d\u3002\u6240\u4ee5\u6211\u4eec\u6709 MAXCLIENTS \u6765\u9650\u5236\u4e00\u4e2a\u670d\u52a1\u5668\u7684 client \u4e0a\u9650\u3002\u4f46\u662f\uff0c\u600e\u4e48\u6bd4\u8f83\u6f02\u4eae\u5730\u5904\u7406\u8fd9\u4e2a\u4e0a\u9650\u95ee\u9898\uff1f\u56e0\u4e3a\u5728\u4e00\u4e2a\u771f\u5b9e\u7684\u804a\u5929\u573a\u666f\u4e0b\uff0c\u804a\u5929\u5ba4\u91cc\u7684\u4eba\u662f\u53ef\u4ee5\u8fdb\u8fdb\u51fa\u51fa\u7684\u3002\n\n\u6211\u4eec\u91c7\u7528 token\u3002\u7cfb\u7edf\u751f\u6210\u6709\u9650\u7684 token\uff0c\u88ab\u62ff\u5149\u540e\uff0c\u5f53\u4e14\u4ec5\u5f53\u6709\u4eba\u5f52\u8fd8 token\uff0c\u7b49\u5f85\u8005\u624d\u80fd\u83b7\u5f97 token\uff0c\u8fdb\u5165\u804a\u5929\u5ba4\u3002\u5728 golang \u4e2d\uff0cgoroutine \u548c chan \u7b80\u76f4\u662f\u4e3a\u6b64\u9700\u6c42\u91cf\u8eab\u5b9a\u5236\u7684\u3002\u6211\u4eec\u770b\u8fd0\u4f5c\u673a\u5236\uff1a\n\n\u9996\u5148\u751f\u6210 MAXCLIENTS \u4e2a token\u3002\n\u7b2c 1 - MAXCLIENTS \u4e2a client:\n\u4ece tokens \u91cc\u62ff\u8d70\u4e00\u4e2a token\n\u628a\u81ea\u5df1\u7684 conn \u653e\u5165 pending channel\uff08\u5982\u679c\u4e4b\u524d\u7684 pending conn \u8fd8\u88ab\u53d6\u8d70\uff0c\u5219\u8fd9\u4e2a goroutine\u5c31\u4f1a\u88ab\u6302\u8d77\uff0c\u7b49\u5f85\u4e4b\u524d\u7684 pending conn \u88ab\u53d6\u8d70\u3002\u5426\u5219\uff0c\u7ee7\u7eed\u6267\u884c\u3002\n\u7b2c (MAXCLIENTS + 1) \u4e2a client:\n\u4ece tokens \u91cc\u62ff\u4e0d\u5230 token \u4e86\uff0c\u5f53\u524d\u7684 goroutine \u5728\u8fd9\u4e00\u70b9\u4e0a\u6302\u8d77\uff0c\u7b49\u5f85 token\u3002\n\u6709\u4eba\u79bb\u5f00\uff1a\n\u5f52\u8fd8\u4e00\u4e2a token\uff0c\u8fd9\u6837\u4e4b\u524d\u88ab\u6302\u8d77\u7b49\u5f85 token \u7684 goroutine \u88ab\u5524\u9192\uff0c\u7ee7\u7eed\u6267\u884c\u3002\n\u6ca1\u6709\u4f7f\u7528\u4efb\u4f55\u540c\u6b65\u673a\u5236\uff0c\u4ee3\u7801\u5e72\u51c0\u6e05\u6670\u6f02\u4eae\uff0c\u6211\u4eec\u5c31\u5b8c\u6210\u4e86\u4e00\u4e2a\u6392\u961f\u7cfb\u7edf\u3002Ura for go!\n\n\u5598\u4e00\u53e3\u6c14\uff0c\u63a5\u4e0b\u6765\u770b join \u7684\u65f6\u5019\u8c03\u7528\u7684 CreateClient \u7684\u4ee3\u7801\uff1a\n\nfunc CreateClient(conn net.Conn) *Client {\n reader := bufio.NewReader(conn)\n writer := bufio.NewWriter(conn)\n\n client := &Client{\n conn: conn,\n incoming: make(Message),\n outgoing: make(Message),\n quiting: make(chan net.Conn),\n reader: reader,\n writer: writer,\n }\n client.Listen()\n return client\n}\nclient.Listen \u6781\u5176\u7ec6\u8282\uff1a\n\nfunc (self *Client) Listen() {\n go self.Read()\n go self.Write()\n}\n\nfunc (self *Client) Read() {\n for {\n if line, _, err := self.reader.ReadLine(); err == nil {\n self.incoming <- string(line)\n } else {\n log.Printf(\"Read error: %s\\n\", err)\n self.quit()\n return\n }\n }\n\n}\n\nfunc (self *Client) Write() {\n for data := range self.outgoing {\n if _, err := self.writer.WriteString(data + \"\\n\"); err != nil {\n self.quit()\n return\n }\n\n if err := self.writer.Flush(); err != nil {\n log.Printf(\"Write error: %s\\n\", err)\n self.quit()\n return\n }\n }\n\n}\nclient.Listen \u91cc\u6211\u4eec\u4e5f\u751f\u6210\u4e86\u4e24\u4e2a goroutine\uff0c\u52a0\u4e0a\u4e4b\u524d\u7684\u4e24\u4e2a\uff0c\u6bcf\u4e2a client \u6709\u56db\u4e2a goroutine\uff08\u6240\u4ee5\u8fd0\u884c\u4e2d\u7684Server\u7684 gorutine \u7684\u6570\u91cf\u63a5\u8fd1\u4e8e client num * 4\uff09\u3002\u867d\u7136\u6211\u4eec\u53ef\u4ee5\u505a\u4e00\u4e9b\u4f18\u5316\uff0c\u4f46\u8fd9\u5e76\u4e0d\u8981\u7d27\uff0c\u4e00\u4e2a go \u8fdb\u7a0b\u91cc\u8fd0\u884c\u6210\u5343\u4e0a\u4e07\u4e2a goroutine\u6ca1\u6709\u592a\u5927\u95ee\u9898\uff0c\u56e0\u4e3a goroutine \u8fd0\u884c\u5728 userspace\uff0c\u5176 memory footprint\u5f88\u5c0f\uff08\u51e0k\uff09\uff0c\u5207\u6362\u4ee3\u4ef7\u975e\u5e38\u4f4e\uff08\u6ca1\u6709 syscall\uff09\u3002\n\n\u8fd9\u4e24\u4e2a goroutine \u6b63\u5982\u4e00\u5f00\u59cb\u8bbe\u8ba1\u65f6\u63d0\u5230\u7684\uff0c\u4e00\u8bfb\u4e00\u5199\uff0c\u901a\u8fc7 channel \u548c\u5916\u754c\u4ea4\u4e92\u3002\n\n\u8fd9\u5c31\u662f\u6574\u4e2a\u804a\u5929\u5ba4\u7684\u4e3b\u4f53\u4ee3\u7801\u3002\u63a5\u4e0b\u6765\u7684\u547d\u4ee4\u884c\u5c31\u5f88\u7b80\u5355\u4e86\u3002\n\n\u5148\u770b Server \u4ee3\u7801\uff1a\n\npackage main\n\nimport (\n . \"chatroom\/chat\"\n \"fmt\"\n \"os\"\n)\n\nfunc main() {\n if len(os.Args) != 2 {\n fmt.Printf(\"Usage: %s
\n os.Exit(-1)
\n }<\/p>\n
\n fmt.Printf(“Running on %s\\n”, os.Args[1])
\n server.Start(os.Args[1])<\/p>\n
\n\u63a5\u4e0b\u6765\u662f Client \u4ee3\u7801\uff1a<\/p>\n
\n “bufio”
\n . “chatroom\/chat”
\n “fmt”
\n “log”
\n “net”
\n “os”
\n)<\/p>\n
\n if len(os.Args) != 2 {
\n fmt.Printf(“Usage: %s
\n os.Exit(-1)
\n }<\/p>\n
\n log.Fatal(err)
\n }<\/p>\n
\n in := bufio.NewReader(os.Stdin)
\n out := bufio.NewWriter(os.Stdout)<\/p>\n
\n for {
\n out.WriteString(client.GetIncoming() + “\\n”)
\n out.Flush()
\n }
\n }()<\/p>\n
\n line, _, _ := in.ReadLine()
\n client.PutOutgoing(string(line))
\n }<\/p>\n
\n\u8fd0\u884c\u4e00\u4e0b\uff08\u8d77\u4e86\u4e24\u4e2aclient\uff09\uff1a<\/p>\n
\n\u279c chatroom git:(master) .\/bin\/chatserver :5555
\nRunning on :5555
\n2014\/01\/30 09:05:24 Server 0xc2000723c0 starts
\n2014\/01\/30 09:05:34 A new connection &{{0xc20008f090}} kicks
\n2014\/01\/30 09:05:34 Auto assigned name for conn 0xc200000100: User 0
\n2014\/01\/30 09:05:48 A new connection &{{0xc20008f120}} kicks
\n2014\/01\/30 09:05:48 Auto assigned name for conn 0xc200000148: User 1
\n2014\/01\/30 09:06:39 Got message: Hello from client User 0
\n2014\/01\/30 09:06:39 Broadcasting message: User 0 says: Hello
\n2014\/01\/30 09:06:48 Got message: :name Tyr from client User 1
\n2014\/01\/30 09:06:48 Broadcasting message: Notification: User 1 changed its name to Tyr
\n2014\/01\/30 09:06:57 Got message: Hello world! from client User 0
\n2014\/01\/30 09:06:57 Broadcasting message: User 0 says: Hello world!
\n2014\/01\/30 09:07:01 Got message: Hello from client Tyr
\n2014\/01\/30 09:07:01 Broadcasting message: Tyr says: Hello
\n2014\/01\/30 09:08:19 Read error: EOF
\n2014\/01\/30 09:08:19 Client User 0 is quiting
\n2014\/01\/30 09:08:19 Broadcasting message: Notification: User 0 quit the chat room.
\n\u5176\u4e2d\u4e00\u4e2a client\uff1a<\/p>\n
\nUser 0 says: Hello
\n:name Tyr
\nNotification: User 1 changed its name to Tyr
\nUser 0 says: Hello world!
\nHello
\nTyr says: Hello
\nNotification: User 0 quit the chat room.
\n\u5b8c\u6574\u4ee3\u7801\u8bf7\u89c1 github repo\u3002<\/p>\n
\n\u4f7f\u7528go test
\n\u6211\u73b0\u5728\u5199\u4ee3\u7801\u5df2\u7ecf\u79bb\u4e0d\u5f00\u975e\u5e38\u65b9\u4fbf\u7684 go test \u4e86\u3002golang \u7684\u5f00\u53d1\u8005\u4eec\u975e\u5e38\u806a\u660e\uff0c\u4ed6\u4eec\u77e5\u9053\u628a\u4e00\u4e2a test framework \/ utility \u653e\u5728\u6838\u5fc3\u7684\u5b89\u88c5\u5305\u4e2d\u662f\u591a\u4e48\u91cd\u8981\u3002\u8fd9\u4e2a chatroom \u662f\u8fed\u4ee3\u5f00\u53d1\u7684\uff0c\u4f60\u53ef\u4ee5 checkout v0.1\/v0.2\/v0.3 \u5206\u522b\u770b\u4e0d\u540c\u65f6\u671f\u7684\u4ee3\u7801\u3002\u6bcf\u6b21\u6dfb\u52a0\u65b0\u529f\u80fd\uff0c\u6216\u8005\u91cd\u6784\u4ee3\u7801\u65f6\uff0cgo test .\/chat \u5c31\u662f\u6211\u4fe1\u5fc3\u7684\u4fdd\u8bc1\u3002\u4ee3\u7801\u548ctest case\u540c\u6b65\u5f00\u53d1\uff0c\u65b0\u7684 feature \u6709\u65b0\u7684 case \u53bb cover\uff0c\u8fd9\u6837\u4e00\u70b9\u70b9\u505a\u4e0a\u53bb\u3002\u62ff\u67f3\u603b\u7684\u8bdd\u8bf4\uff0c\u5c31\u662f\uff1a\u300e\u5792\u4e00\u5c42\u571f\uff0c\u592f\u5b9e\uff0c\u518d\u5792\u4e00\u5c42\u300f\u3002<\/p>\n
\nok chatroom\/chat 0.246s
\n\u5e76\u53d1\u4e0e\u540c\u6b65
\ngolang \u5728\u8bbe\u8ba1\u65f6\u505a\u4e86\u5f88\u591a\u53d6\u820d\u3002\u5176\u4e2d\uff0c\u5bf9map\u7684\u64cd\u4f5c\u662f\u5426\u539f\u5b50\u5c31\u6709\u5f88\u591a debate\u3002\u6700\u7ec8\uff0c\u4e3a\u4e86 performance\uff0cmap \u7684\u64cd\u4f5c\u4e0d\u5177\u5907\u539f\u5b50\u6027\uff0c\u4ea6\u5373\u4e0d\u662f multithread safe\u3002\u6240\u4ee5\uff0c\u6b63\u786e\u7684\u505a\u6cd5\u662f\u5728\u4ece map \u4e2d\u5220\u9664\u4e00\u4e2a conn \u65f6\u548c\u4f7f\u7528 range \u4e2d\u8bfb\u53d6\u65f6\u505a\u8bfb\u5199\u540c\u6b65\u3002\u7531\u4e8e\u672c\u4f8b\u8fd0\u884c\u5728\u5355\u7ebf\u7a0b\u73af\u5883\u4e0b\uff08\u662f\u7684\uff0c\u5982\u679c\u4f60\u4e0d\u6307\u5b9a\uff0cgolang process \u9ed8\u8ba4\u5355\u7ebf\u7a0b\uff09\uff0c\u4e14\u4ee5\u6559\u5b66\u4e3a\u76ee\u7684\uff0c\u5b9e\u5728\u4e0d\u5fcd\u7528\u96be\u770b\u7684\u540c\u6b65\u64cd\u4f5c\u964d\u4f4e\u4ee3\u7801\u7684\u7f8e\u611f\u3002<\/p>\n
\n\u5728\u6211\u7684\u4ee3\u7801\u91cc\uff0cclose \u505a\u5f97\u6bd4\u8f83 ugly\uff0c\u4e0d\u77e5\u4f60\u662f\u5426\u611f\u53d7\u5230\u4e86\u3002\u66f4\u597d\u7684\u505a\u6cd5\u662f\u4f7f\u7528 close \u4e00\u4e2a channel \u6765\u5b8c\u6210\u5173\u95ed goroutine \u7684\u52a8\u4f5c\u3002\u5f53 close \u53d1\u751f\u65f6\uff0c\u6240\u6709\u63a5\u6536\u8fd9\u4e2a channel \u7684 goroutine \u90fd\u4f1a\u6536\u5230\u901a\u77e5\u3002\u4e0b\u9762\u662f\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n
\n “fmt”
\n “strconv”
\n “time”
\n)<\/p>\n
\n N = 10
\n)<\/p>\n
\n quit := make(chan bool)<\/p>\n
\n ok = true
\n }
\n return
\n}
\n\u603b\u7ed3\u4e00\u6761\u94c1\u5f8b\uff1aproject \u7ea7\u7684 DRY \u662f\u51fd\u6570\u5316\uff0cpackage\u5316\uff1bcross project\u7684 DRY \u662f repo \u5316\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"