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package ipc
import (
"bufio"
"errors"
"fmt"
"net"
"net/url"
"os"
"path"
"strings"
"sync/atomic"
"time"
"git.sr.ht/~rjarry/aerc/log"
"github.com/kyoh86/xdg"
)
type AercServer struct {
listener net.Listener
OnMailto func(addr *url.URL) error
OnMbox func(source string) error
}
func StartServer() (*AercServer, error) {
sockpath := path.Join(xdg.RuntimeDir(), "aerc.sock")
// remove the socket if it is not connected to a session
if err := ConnectAndExec(""); err != nil {
os.Remove(sockpath)
}
log.Debugf("Starting Unix server: %s", sockpath)
l, err := net.Listen("unix", sockpath)
if err != nil {
return nil, err
}
as := &AercServer{listener: l}
go as.Serve()
return as, nil
}
func (as *AercServer) Close() {
as.listener.Close()
}
var lastId int64 = 0 // access via atomic
func (as *AercServer) Serve() {
defer log.PanicHandler()
for {
conn, err := as.listener.Accept()
switch {
case errors.Is(err, net.ErrClosed):
log.Infof("shutting down UNIX listener")
return
case err != nil:
log.Errorf("ipc: accepting connection failed: %v", err)
continue
}
defer conn.Close()
clientId := atomic.AddInt64(&lastId, 1)
log.Debugf("unix:%d accepted connection", clientId)
scanner := bufio.NewScanner(conn)
err = conn.SetDeadline(time.Now().Add(1 * time.Minute))
if err != nil {
log.Errorf("unix:%d failed to set deadline: %v", clientId, err)
}
for scanner.Scan() {
err = conn.SetDeadline(time.Now().Add(1 * time.Minute))
if err != nil {
log.Errorf("unix:%d failed to update deadline: %v", clientId, err)
}
msg := scanner.Text()
log.Tracef("unix:%d got message %s", clientId, msg)
_, err = conn.Write([]byte(as.handleMessage(msg)))
if err != nil {
log.Errorf("unix:%d failed to send response: %v", clientId, err)
break
}
}
log.Tracef("unix:%d closed connection", clientId)
}
}
func (as *AercServer) handleMessage(msg string) string {
if !strings.ContainsRune(msg, ':') {
return "error: invalid command\n"
}
prefix := msg[:strings.IndexRune(msg, ':')]
var err error
switch prefix {
case "mailto":
mailto, err := url.Parse(msg)
if err != nil {
return fmt.Sprintf("error: %v\n", err)
}
if as.OnMailto != nil {
err = as.OnMailto(mailto)
if err != nil {
return fmt.Sprintf("mailto failed: %v\n", err)
}
}
case "mbox":
if as.OnMbox != nil {
err = as.OnMbox(msg)
if err != nil {
return fmt.Sprintf("mbox failed: %v\n", err)
}
}
}
return "result: success\n"
}
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