Update README.md

README.md

@@ -1,4 +1,112 @@
 go-pop3
 ==========
 
-GolangでのPOP3クライアントの実装サンプルです。
+This is a simple POP3 client package in Go language.
+
+##Usage
+```go
+if err := pop3.ReceiveMail(address, user, pass,
+	func(number int, uid, data string, err error) (bool, error) {
+		log.Printf("%d, %s\n", number, uid)
+
+    // implement your own logic here
+
+		return false, nil
+	}); err != nil {
+	log.Fatalf("%v\n", err)
+}
+```
+or use the method that implements the command  
+```go
+client, err := pop3.Dial(address)
+
+if err != nil {
+	log.Fatalf("Error: %v\n", err)
+}
+
+defer func() {
+	client.Quit()
+	client.Close()
+}()
+
+if err = client.User(user); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+if err = client.Pass(pass); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+var count int
+var size uint64
+
+if count, size, err = client.Stat(); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+log.Printf("Count: %d, Size: %d\n", count, size)
+
+if count, size, err = client.List(6); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+log.Printf("Number: %d, Size: %d\n", count, size)
+
+var mis []pop3.MessageInfo
+
+if mis, err = client.ListAll(); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+for _, mi := range mis {
+	log.Printf("Number: %d, Size: %d\n", mi.Number, mi.Size)
+}
+
+var number int
+var uid string
+
+if number, uid, err = client.Uidl(6); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+log.Printf("Number: %d, Uid: %s\n", number, uid)
+
+if mis, err = client.UidlAll(); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+for _, mi := range mis {
+	log.Printf("Number: %d, Uid: %s\n", mi.Number, mi.Uid)
+}
+
+var content string
+
+if content, err = client.Retr(8); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+log.Printf("Content:\n%s\n", content)
+
+if err = client.Dele(6); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+if err = client.Noop(); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+
+if err = client.Rset(); err != nil {
+	log.Printf("Error: %v\n", err)
+	return
+}
+```