refactor: returns receive-only channel to prevent closing it from the caller go-ldap#319

Author: t2y

search.go

@@ -587,7 +587,7 @@ func (l *Conn) Search(searchRequest *SearchRequest) (*SearchResult, error) {
 // all results until an error happens (or the search successfully finished),
 // e.g. for size / time limited requests all are recieved via the channel
 // until the limit is reached.
-func (l *Conn) SearchWithChannel(ctx context.Context, searchRequest *SearchRequest) chan *SearchSingleResult {
+func (l *Conn) SearchWithChannel(ctx context.Context, searchRequest *SearchRequest) <-chan *SearchSingleResult {
 	ch := make(chan *SearchSingleResult)
 	go func() {
 		defer close(ch)

v3/search.go

@@ -589,7 +589,7 @@ func (l *Conn) Search(searchRequest *SearchRequest) (*SearchResult, error) {
 // all results until an error happens (or the search successfully finished),
 // e.g. for size / time limited requests all are recieved via the channel
 // until the limit is reached.
-func (l *Conn) SearchWithChannel(ctx context.Context, searchRequest *SearchRequest) chan *SearchSingleResult {
+func (l *Conn) SearchWithChannel(ctx context.Context, searchRequest *SearchRequest) <-chan *SearchSingleResult {
 	ch := make(chan *SearchSingleResult)
 	go func() {
 		defer close(ch)