fix: cancel inflight cloud signaling requests

src/slic3r/Utils/Http.cpp

@@ -1,5 +1,6 @@
 #include "Http.hpp"
 
+#include <atomic>
 #include <cstdlib>
 #include <functional>
 #include <thread>
@@ -133,7 +134,7 @@ struct Http::priv
 	std::string error_buffer;    // Used for CURLOPT_ERRORBUFFER
     std::string headers;
 	size_t limit;
-	bool cancel;
+	std::atomic_bool cancel;
     std::unique_ptr<form_file> putFile;
 
 	std::thread io_thread;
@@ -271,9 +272,9 @@ int Http::priv::xfercb(void *userp, curl_off_t dltotal, curl_off_t dlnow, curl_o
 		self->progressfn(progress, cb_cancel);
 	}
 
-	if (cb_cancel) { self->cancel = true; }
+	if (cb_cancel) { self->cancel.store(true); }
 
-	return self->cancel;
+	return self->cancel.load();
 }
 
 int Http::priv::xfercb_legacy(void *userp, double dltotal, double dlnow, double ultotal, double ulnow)
@@ -484,7 +485,7 @@ void Http::priv::http_perform()
 
 	if (res != CURLE_OK) {
 		if (res == CURLE_ABORTED_BY_CALLBACK) {
-			if (cancel) {
+			if (cancel.load()) {
 				// The abort comes from the request being cancelled programatically
 				Progress dummyprogress(0, 0, 0, 0, std::string());
 				bool cancel = true;
@@ -795,7 +796,7 @@ void Http::perform_sync()
 
 void Http::cancel()
 {
-	if (p) { p->cancel = true; }
+	if (p) { p->cancel.store(true); }
 }
 
 void Http::print() const

src/slic3r/Utils/OrcaCloudSignalingChannel.cpp

@@ -42,10 +42,16 @@ void OrcaCloudSignalingChannel::close()
 {
     m_stop.store(true);
     std::shared_ptr<Connection> conn;
+    Http::Ptr request;
     {
         std::lock_guard<std::mutex> lock(m_mutex);
         conn = m_conn;
+        request = m_inflight_requests;
     }
+    // m_conn is installed only after the live-token request completes, so
+    // cancel the request independently before waiting for the worker.
+    if (request)
+        request->cancel();
     if (conn) {
         // Established session: close the socket on the io_context's own thread so
         // the pending async_read completes and io_context.run() unwinds.
@@ -123,8 +129,9 @@ void OrcaCloudSignalingChannel::run()
         nlohmann::json token_response;
         std::string token_body;
         unsigned int http_code = 0;
-        auto request = Http::post(live_token_url);
+
-        request.set_post_body(std::string("{}"))
+        auto request = std::make_shared<Slic3r::Http>(Http::post(live_token_url));
+        request->set_post_body(std::string("{}"))
             .header("Authorization", "Bearer " + token)
             .header("Content-Type", "application/json")
             .tls_verify(true)
@@ -135,8 +142,32 @@ void OrcaCloudSignalingChannel::run()
             })
             .on_error([&http_code](std::string, std::string, unsigned status) {
                 http_code = status;
-            })
+            });
-            .perform_sync();
+
+        {
+            std::lock_guard<std::mutex> lock(m_mutex);
+            m_inflight_requests = request;
+        }
+
+        // If close() raced with request setup, make sure this request is
+        // cancelled before entering the blocking call.
+        if (m_stop.load())
+            request->cancel();
+        try {
+            request->perform_sync();
+        } catch (...) {
+            std::lock_guard<std::mutex> lock(m_mutex);
+            if (m_inflight_requests == request)
+                m_inflight_requests.reset();
+            throw;
+        }
+
+        {
+            std::lock_guard<std::mutex> lock(m_mutex);
+            if (m_inflight_requests == request)
+                m_inflight_requests.reset();
+        }
+
         try {
             token_response = nlohmann::json::parse(token_body);
         } catch (const std::exception&) {

src/slic3r/Utils/OrcaCloudSignalingChannel.hpp

@@ -1,8 +1,8 @@
 #pragma once
 
 #include "ICameraSignalingChannel.hpp"
-#include "ICloudServiceAgent.hpp"
 #include "OrcaCloudServiceAgent.hpp"
+#include "Http.hpp"
 
 #include <boost/asio/io_context.hpp>
 #include <boost/asio/ip/tcp.hpp>
@@ -52,6 +52,9 @@ private:
     static std::string encode_path_component(const std::string& value);
 
     OrcaCloudServiceAgent* m_cloud;
+
+    Http::Ptr m_inflight_requests{nullptr};
+
     std::string m_dev_id;
     std::atomic<bool> m_stop{false};
     std::atomic<bool> m_open{false};