Chat server: Difference between revisions
Content added Content deleted
(add javascript (node.js) solution) |
(→{{header|Go}}: language changes: error type and delete function) |
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| Line 163: | Line 163: | ||
<lang go>package main |
<lang go>package main |
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import( |
import ( |
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"os" |
"os" |
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"fmt" |
"fmt" |
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| Line 173: | Line 173: | ||
// Quick and dirty error handling. |
// Quick and dirty error handling. |
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func |
func error_(err error, r int) { |
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fmt.Printf("Error: %v\n", err) |
fmt.Printf("Error: %v\n", err) |
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| Line 186: | Line 186: | ||
// A method that makes clientMap compatible with io.Writer, allowing it to be |
// A method that makes clientMap compatible with io.Writer, allowing it to be |
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// used with fmt.Fprintf(). |
// used with fmt.Fprintf(). |
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func (cm clientMap)Write(buf []byte) (n int, err |
func (cm clientMap) Write(buf []byte) (n int, err error) { |
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for _, c := range |
for _, c := range cm { |
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// Write to each client in a seperate goroutine. |
// Write to each client in a seperate goroutine. |
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go c.Write(buf) |
go c.Write(buf) |
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| Line 198: | Line 198: | ||
// Check if a name exists; if it doesn't, add it. |
// Check if a name exists; if it doesn't, add it. |
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func (cm clientMap)Add(name string, c net.Conn) |
func (cm clientMap) Add(name string, c net.Conn) bool { |
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for k := range |
for k := range cm { |
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if name == k { |
if name == k { |
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return false |
return false |
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| Line 228: | Line 228: | ||
buf, err := br.ReadBytes('\n') |
buf, err := br.ReadBytes('\n') |
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if err != nil { |
if err != nil { |
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error_(err, -1) |
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return |
return |
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} |
} |
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| Line 251: | Line 251: | ||
defer func() { |
defer func() { |
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// Remove the client from the list. |
// Remove the client from the list. |
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clients |
delete(clients, name) |
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}() |
}() |
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| Line 267: | Line 267: | ||
switch { |
switch { |
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// Support for '/me' type messages. |
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case string(buf[0:3]) == "/me": |
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buf = append([]byte(name), buf[3:]...) |
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default: |
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// Prepend the user-name and '> '. |
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buf = append([]byte(name+"> "), buf...) |
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} |
} |
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| Line 282: | Line 282: | ||
func main() { |
func main() { |
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// Flags. Use -help for usage info. |
// Flags. Use -help for usage info. |
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var( |
var ( |
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port int |
port int |
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help bool |
help bool |
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| Line 298: | Line 298: | ||
lis, err := net.Listen("tcp", fmt.Sprintf(":%v", port)) |
lis, err := net.Listen("tcp", fmt.Sprintf(":%v", port)) |
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if err != nil { |
if err != nil { |
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error_(err, 1) |
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} |
} |
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| Line 305: | Line 305: | ||
c, err := lis.Accept() |
c, err := lis.Accept() |
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if err != nil { |
if err != nil { |
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error_(err, -1) |
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continue |
continue |
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} |
} |
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