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Added simple change to allow user detection of services *leaving* via… #60

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Added simple change to allow user detection of services *leaving* via… #60

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13 changes: 4 additions & 9 deletions client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -191,8 +191,8 @@ func (c *client) mainloop(ctx context.Context, params *LookupParams) {
}

// Iterate through channels from listeners goroutines
var entries, sentEntries map[string]*ServiceEntry
sentEntries = make(map[string]*ServiceEntry)
var entries map[string]*ServiceEntry
sentEntries := make(map[string]uint32)
for {
select {
case <-ctx.Done():
Expand Down Expand Up @@ -273,12 +273,7 @@ func (c *client) mainloop(ctx context.Context, params *LookupParams) {

if len(entries) > 0 {
for k, e := range entries {
if e.TTL == 0 {
delete(entries, k)
delete(sentEntries, k)
continue
}
if _, ok := sentEntries[k]; ok {
if oldTTL, ok := sentEntries[k]; ok && (e.TTL==oldTTL) {
continue
}

Expand All @@ -295,7 +290,7 @@ func (c *client) mainloop(ctx context.Context, params *LookupParams) {
// This is also a point to possibly stop probing actively for a
// service entry.
params.Entries <- e
sentEntries[k] = e
sentEntries[k] = e.TTL
params.disableProbing()
}
// reset entries
Expand Down
6 changes: 5 additions & 1 deletion examples/resolv/client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,11 @@ func main() {
entries := make(chan *zeroconf.ServiceEntry)
go func(results <-chan *zeroconf.ServiceEntry) {
for entry := range results {
log.Println(entry)
if entry.TTL>0 {
log.Println("[+]", entry)
} else {
log.Println("[-]", entry)
}
}
log.Println("No more entries.")
}(entries)
Expand Down