diff --git a/libs/http_client/curl_thread_pool_p.cpp b/libs/http_client/curl_thread_pool_p.cpp
index cff0a3fd..8e188f0c 100644
--- a/libs/http_client/curl_thread_pool_p.cpp
+++ b/libs/http_client/curl_thread_pool_p.cpp
@@ -7,6 +7,7 @@
 #include <curl/curl.h>
 
 CurlThreadPool::CurlThreadPool() {
+	curl_global_init(CURL_GLOBAL_DEFAULT);
 	piForTimes(10) {
 		auto * t = new PIThread([this]() { threadFunc(); }, true);
 		threads << t;
@@ -15,27 +16,10 @@ CurlThreadPool::CurlThreadPool() {
 
 
 CurlThreadPool::~CurlThreadPool() {
-	exiting = true;
-	for (auto * t: threads)
-		t->stop();
-	{
-		auto cr = clients.getRef();
-		for (auto c: *cr)
-			c->abort();
-	}
-	sem.release(threads.size());
-	for (auto * t: threads) {
-		t->waitForFinish();
-		t->setDebug(false);
-		t->terminate();
-	}
-	piDeleteAllAndClear(threads);
-	{
-		auto cr = clients.getRef();
-		for (auto c: *cr)
-			delete c;
-	}
+	destroy();
+	// piCout << "~CurlThreadPool cleanup ...";
 	curl_global_cleanup();
+	// piCout << "~CurlThreadPool cleanup ok";
 }
 
 
@@ -75,3 +59,30 @@ CurlThreadPool * CurlThreadPool::instance() {
 	static CurlThreadPool ret;
 	return &ret;
 }
+
+void CurlThreadPool::destroy() {
+	// piCout << "~CurlThreadPool";
+	exiting = true;
+	for (auto * t: threads)
+		t->stop();
+	{
+		auto cr = clients.getRef();
+		for (auto c: *cr)
+			c->abort();
+	}
+	// piCout << "~CurlThreadPool release ...";
+	sem.release(threads.size());
+	for (auto * t: threads) {
+		t->waitForFinish();
+		t->setDebug(false);
+		t->terminate();
+	}
+	// piCout << "~CurlThreadPool delete ...";
+	piDeleteAllAndClear(threads);
+	{
+		auto cr = clients.getRef();
+		for (auto c: *cr)
+			delete c;
+	}
+	// piCout << "~CurlThreadPool ok";
+}
diff --git a/libs/http_client/curl_thread_pool_p.h b/libs/http_client/curl_thread_pool_p.h
index 5b4f1b7c..9b6a6bfe 100644
--- a/libs/http_client/curl_thread_pool_p.h
+++ b/libs/http_client/curl_thread_pool_p.h
@@ -1,13 +1,14 @@
 #ifndef curl_thread_pool_p_H
 #define curl_thread_pool_p_H
 
+#include "pip_http_client_export.h"
 #include "piprotectedvariable.h"
 #include "pisemaphore.h"
 #include "pithread.h"
 
 class PIHTTPClient;
 
-class CurlThreadPool {
+class PIP_HTTP_CLIENT_EXPORT CurlThreadPool {
 public:
 	void registerClient(PIHTTPClient * c);
 
@@ -18,6 +19,7 @@ private:
 	CurlThreadPool();
 	~CurlThreadPool();
 
+	void destroy();
 	void threadFunc();
 	void procClient(PIHTTPClient * c);
 
diff --git a/libs/http_client/pihttpclient.cpp b/libs/http_client/pihttpclient.cpp
index 2429f08f..c6486268 100644
--- a/libs/http_client/pihttpclient.cpp
+++ b/libs/http_client/pihttpclient.cpp
@@ -22,8 +22,30 @@ int debug_callback(CURL * handle, curl_infotype type, char * data, size_t size,
 
 
 PRIVATE_DEFINITION_START(PIHTTPClient)
+	CURLM * multi            = nullptr;
 	CURL * handle            = nullptr;
 	curl_slist * header_list = nullptr;
+	bool isInit() const {
+		return multi && handle;
+	}
+	bool init() {
+		multi  = curl_multi_init();
+		handle = curl_easy_init();
+		if (!multi || !handle) {
+			destroy();
+			return false;
+		}
+		return true;
+	}
+	void destroy() {
+		if (multi && handle) curl_multi_remove_handle(multi, handle);
+		if (header_list) curl_slist_free_all(header_list);
+		if (handle) curl_easy_cleanup(handle);
+		if (multi) curl_multi_cleanup(multi);
+		multi       = nullptr;
+		handle      = nullptr;
+		header_list = nullptr;
+	}
 PRIVATE_DEFINITION_END(PIHTTPClient)
 
 
@@ -35,8 +57,8 @@ PIHTTPClient::~PIHTTPClient() {}
 
 bool PIHTTPClient::init() {
 	if (is_cancel) return false;
-	PRIVATE->handle = curl_easy_init();
-	if (!PRIVATE->handle) return false;
+	CurlThreadPool::instance();
+	if (!PRIVATE->init()) return false;
 	auto ait = request.arguments().makeIterator();
 	while (ait.next()) {
 		if (!url.contains('?'))
@@ -81,30 +103,64 @@ bool PIHTTPClient::init() {
 
 
 void PIHTTPClient::perform() {
-	if (!PRIVATE->handle) return;
+	if (!PRIVATE->isInit()) return;
 	if (!is_cancel) {
 		// piCout << "perform ...";
 		PITimeMeasurer tm;
-		CURLcode res = curl_easy_perform(PRIVATE->handle);
-		// piCout << "done" << res << "in" << tm.elapsed_m() << ", bytes" << buffer_out.size();
-		if (res == CURLE_OK) {
-			reply.setBody(std::move(buffer_out));
-			if (on_finish) on_finish(reply);
-		} else {
-			if (res == CURLE_ABORTED_BY_CALLBACK || is_cancel) {
-				// piCerr << "curl_easy_perform() failed:" << curl_easy_strerror(res);
-				if (on_abort) on_abort(reply);
-			} else {
-				last_error = curl_easy_strerror(res);
-				if (on_error) on_error(reply);
+		// CURLcode res    = curl_easy_perform(PRIVATE->handle);
+
+		curl_multi_add_handle(PRIVATE->multi, PRIVATE->handle);
+		int running_cnt = 1;
+		do {
+			CURLMcode mc = curl_multi_perform(PRIVATE->multi, &running_cnt);
+			// piCout << "curl_multi_perform" << mc << running_cnt;
+			if (!mc) /* wait for activity, timeout or "nothing" */
+				mc = curl_multi_poll(PRIVATE->multi, nullptr, 0, 50, nullptr);
+			if (mc || is_cancel) {
+				// piCout << "curl_multi_poll() failed";
+				break;
 			}
+
+		} while (running_cnt > 0 && !is_cancel);
+
+		if (is_cancel) {
+			if (on_abort) on_abort(reply);
+			PRIVATE->destroy();
+			return;
 		}
+
+		CURLMsg * m  = nullptr;
+		CURLcode res = (CURLcode)-1;
+		do {
+			int msgq = 0;
+			m        = curl_multi_info_read(PRIVATE->multi, &msgq);
+			if (m && (m->msg == CURLMSG_DONE)) {
+				res = m->data.result;
+				if (res == CURLE_OK) {
+					reply.setBody(std::move(buffer_out));
+					if (on_finish) on_finish(reply);
+				} else {
+					if (res == CURLE_ABORTED_BY_CALLBACK || is_cancel) {
+						// piCerr << "curl_easy_perform() failed:" << curl_easy_strerror(res);
+						if (on_abort) on_abort(reply);
+					} else {
+						last_error = curl_easy_strerror(res);
+						if (on_error) on_error(reply);
+					}
+				}
+				break;
+			}
+		} while (m && !is_cancel);
+
+		if (res == (CURLcode)-1) {
+			last_error = "CURL error";
+			if (on_error) on_error(reply);
+		}
+
+		// piCout << "done" << (int)res << "in" << tm.elapsed_m() << ", bytes" << buffer_out.size();
 	}
 	// piCout << last_error;
-	if (PRIVATE->header_list) curl_slist_free_all(PRIVATE->header_list);
-	curl_easy_cleanup(PRIVATE->handle);
-	PRIVATE->handle      = nullptr;
-	PRIVATE->header_list = nullptr;
+	PRIVATE->destroy();
 }
 
 
@@ -224,6 +280,7 @@ void PIHTTPClient::start() {
 
 void PIHTTPClient::abort() {
 	is_cancel = true;
+	if (PRIVATE->isInit()) curl_multi_wakeup(PRIVATE->multi);
 }
 
 
diff --git a/libs/main/http_common/pihttpconstants.h b/libs/main/http_common/pihttpconstants.h
index 8fbef355..7a3ad45c 100644
--- a/libs/main/http_common/pihttpconstants.h
+++ b/libs/main/http_common/pihttpconstants.h
@@ -18,7 +18,7 @@ enum class Method {
 };
 
 enum class Code {
-	Unknown,
+	Unknown                          = -1,
 	Continue                         = 100,
 	SwitchingProtocols               = 101,
 	Processing                       = 102,
diff --git a/libs/main/http_common/pihttptypes.cpp b/libs/main/http_common/pihttptypes.cpp
index fa2bedf0..924732f7 100644
--- a/libs/main/http_common/pihttptypes.cpp
+++ b/libs/main/http_common/pihttptypes.cpp
@@ -18,6 +18,35 @@ const char * PIHTTP::methodName(Method m) {
 }
 
 
+// PIHTTP::MessageConst
+
+bool PIHTTP::MessageConst::isCodeInformational() const {
+	return (int)code() >= 100 && (int)code() < 200;
+}
+
+
+bool PIHTTP::MessageConst::isCodeSuccess() const {
+	return (int)code() >= 200 && (int)code() < 300;
+}
+
+
+bool PIHTTP::MessageConst::isCodeRedirection() const {
+	return (int)code() >= 300 && (int)code() < 400;
+}
+
+
+bool PIHTTP::MessageConst::isCodeClientError() const {
+	return (int)code() >= 400 && (int)code() < 500;
+}
+
+
+bool PIHTTP::MessageConst::isCodeServerError() const {
+	return (int)code() >= 500 && (int)code() < 600;
+}
+
+
+// PIHTTP::MessageMutable
+
 PIHTTP::MessageMutable & PIHTTP::MessageMutable::addHeader(const PIString & header, const PIString & value) {
 	m_headers[header] = value;
 	return *this;
diff --git a/libs/main/http_common/pihttptypes.h b/libs/main/http_common/pihttptypes.h
index 54d803ed..b9b3ccad 100644
--- a/libs/main/http_common/pihttptypes.h
+++ b/libs/main/http_common/pihttptypes.h
@@ -13,6 +13,12 @@ class PIP_EXPORT MessageConst {
 public:
 	PIHTTP::Method method() const { return m_method; }
 	PIHTTP::Code code() const { return m_code; }
+	bool isCodeInformational() const;
+	bool isCodeSuccess() const;
+	bool isCodeRedirection() const;
+	bool isCodeClientError() const;
+	bool isCodeServerError() const;
+	bool isCodeError() const { return isCodeClientError() || isCodeServerError(); }
 	const PIString & path() const { return m_path; }
 	PIStringList pathList() const { return m_path.split('/').removeAll({}); }
 	const PIByteArray & body() const { return m_body; }