avoid duplicate construction for http dialer

Signed-off-by: liulanzheng <lanzheng.liulz@alibaba-inc.com>

net/http/client.cpp

@@ -41,21 +41,35 @@ class PooledDialer {
  std::unique_ptr<ISocketClient> tlssock;
  std::unique_ptr<ISocketClient> udssock;
  std::unique_ptr<Resolver> resolver;
+ bool initialized = false;
+ photon::mutex init_mtx;
 
- //etsocket seems not support multi thread very well, use tcp_socket now. need to find out why
- PooledDialer(TLSContext *_tls_ctx) :
- tls_ctx(_tls_ctx ? _tls_ctx : new_tls_context(nullptr, nullptr, nullptr)),
- tls_ctx_ownership(_tls_ctx == nullptr),
- resolver(new_default_resolver(kDNSCacheLife)) {
+ PooledDialer() {
+ photon::fini_hook({this, &PooledDialer::at_photon_fini});
+ }
+
+ ~PooledDialer() {
+ }
+
+ int init(TLSContext *_tls_ctx) {
+ if (initialized)
+ return 0;
+ SCOPED_LOCK(init_mtx);
+ if (initialized)
+ return 0;
+ tls_ctx = _tls_ctx;
+ if (!tls_ctx) {
+ tls_ctx_ownership = true;
+ tls_ctx = new_tls_context(nullptr, nullptr, nullptr);
+ }
  auto tcp_cli = new_tcp_socket_client();
  auto tls_cli = new_tls_client(tls_ctx, new_tcp_socket_client(), true);
  tcpsock.reset(new_tcp_socket_pool(tcp_cli, -1, true));
  tlssock.reset(new_tcp_socket_pool(tls_cli, -1, true));
  udssock.reset(new_uds_client());
- photon::fini_hook({this, &PooledDialer::at_photon_fini});
- }
-
- ~PooledDialer() {
+ resolver.reset(new_default_resolver(kDNSCacheLife));
+ initialized = true;
+ return 0;
  }
 
  void at_photon_fini() {
@@ -145,7 +159,8 @@ class ClientImpl : public Client {
  }
 
  PooledDialer& get_dialer() {
- thread_local PooledDialer dialer(m_tls_ctx);
+ thread_local PooledDialer dialer;
+ dialer.init(m_tls_ctx);
  return dialer;
  }