From e09ccd4a8d7a91f2b5f21eaaf792974b364ca31b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aur=C3=A9lien=20Chatelain?= <aurelien.chatelain@utbm.fr>
Date: Wed, 9 Mar 2016 18:58:18 +0100
Subject: [PATCH] Fixes badly closed curl thread when cancelled

---
 Win/PublishSkfb.h       | 14 ++++++--------
 Win/SketchfabUploader.h | 23 ++++++++++++++++++-----
 2 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/Win/PublishSkfb.h b/Win/PublishSkfb.h
index 4f9ee48a..937d1e8f 100644
--- a/Win/PublishSkfb.h
+++ b/Win/PublishSkfb.h
@@ -54,6 +54,7 @@ int doPublishSkfb(HINSTANCE hInst,HWND hWnd);
 INT_PTR CALLBACK managePublishWindow(HWND hDlg,UINT message,WPARAM wParam,LPARAM lParam);
 INT_PTR CALLBACK manageUploadWindow(HWND hDlg,UINT message,WPARAM wParam,LPARAM lParam);
 HANDLE uploadThreadHandle = NULL;
+SketchfabV2Uploader* uploader;
 
 LPCWSTR stringToLpwstr(std::string input)
 {
@@ -96,8 +97,8 @@ int doPublishSkfb(HINSTANCE hInst,HWND hWnd)
 DWORD WINAPI thread_func(LPVOID lpParameter)
 {
     UNREFERENCED_PARAMETER(lpParameter);
-    SketchfabV2Uploader uploader;
-    lastResponse = uploader.upload(uploadWindow, skfbPbdata.skfbApiToken, skfbPbdata.skfbFilePath, skfbPbdata.skfbName, skfbPbdata.skfbDescription, skfbPbdata.skfbTags, skfbPbdata.skfbDraft, skfbPbdata.skfbPrivate, skfbPbdata.skfbPassword);
+    uploader = new SketchfabV2Uploader();
+    lastResponse = uploader->upload(uploadWindow, skfbPbdata.skfbApiToken, skfbPbdata.skfbFilePath, skfbPbdata.skfbName, skfbPbdata.skfbDescription, skfbPbdata.skfbTags, skfbPbdata.skfbDraft, skfbPbdata.skfbPrivate, skfbPbdata.skfbPassword);
     SendMessage(uploadWindow, SIGNAL_UPLOAD_FINISHED, 100, 0);
     return 0;
 }
@@ -138,6 +139,7 @@ INT_PTR CALLBACK manageUploadWindow(HWND hDlg,UINT message,WPARAM wParam,LPARAM
             errorMessageStr.c_str(),
                 L"Upload failed",
                 MB_OKCANCEL | MB_ICONERROR);
+            delete uploader;
         }
 
         EndDialog(hDlg, (INT_PTR)TRUE);
@@ -148,12 +150,8 @@ INT_PTR CALLBACK manageUploadWindow(HWND hDlg,UINT message,WPARAM wParam,LPARAM
         switch (LOWORD(wParam))
         {
             case IDC_SKFB_UPLOAD_CANCEL:
-                // Terminate thread
-                TerminateThread(uploadThreadHandle, 1);
-                EndDialog(hDlg, (INT_PTR)FALSE);
-                MessageBox(NULL,
-                    _T("Upload cancelled by the user"), _T("Upload interrupted"), MB_OK | MB_ICONERROR);
-                return (INT_PTR)FALSE;
+                // Ask curl to stop upload
+                uploader->abort();
             }
             break;
     }
diff --git a/Win/SketchfabUploader.h b/Win/SketchfabUploader.h
index 4020f8e8..8e616c31 100644
--- a/Win/SketchfabUploader.h
+++ b/Win/SketchfabUploader.h
@@ -12,6 +12,7 @@ typedef std::map<std::string, std::string> attributes;
 struct ProgressbarUpdater {
     CURL *curl;
     HWND progressBar;
+    bool cancel;
 };
 
 // Taken from https://curl.haxx.se/libcurl/c/progressfunc.html
@@ -22,11 +23,12 @@ int progress_callback(void *clientp,
 
     UNREFERENCED_PARAMETER(dltotal);
     UNREFERENCED_PARAMETER(dlnow);
-    // Hack to smooth the progress bar
-
     struct ProgressbarUpdater *myp = (struct ProgressbarUpdater *)clientp;
-    double curtime = 0;
 
+    if(myp->cancel)
+        return 1;
+
+    double curtime = 0;
     curl_easy_getinfo(myp->curl, CURLINFO_TOTAL_TIME, &curtime);
 
     curl_off_t total_percen = 0;
@@ -45,7 +47,13 @@ static size_t WriteMemoryCallback(char *contents, size_t size, size_t nmemb, voi
 }
 
 class SketchfabV2Uploader {
+private:
+    struct ProgressbarUpdater prog;
 public:
+    void abort()
+    {
+        prog.cancel=true;
+    }
     std::pair<bool, std::string> upload(HWND progressBar,
                                         const std::string& token,
                                         const std::string& filepath,
@@ -90,7 +98,6 @@ class SketchfabV2Uploader {
                                      HWND progressBar=NULL)
     {
         CURL *curl;
-        struct ProgressbarUpdater prog;
         CURLcode res;
         long http_code;
         std::string response;
@@ -132,6 +139,7 @@ class SketchfabV2Uploader {
     if (curl) {
         prog.curl = curl;
         prog.progressBar = progressBar;
+        prog.cancel = false;
 
         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
@@ -142,9 +150,14 @@ class SketchfabV2Uploader {
         curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);
         curl_easy_setopt(curl, CURLOPT_TIMEOUT, 900L);
         curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, progress_callback);
+
         res = curl_easy_perform(curl);
         if (res != CURLE_OK) {
-            return std::pair<int, std::string>(1, "{\"detail\":\"curl_easy_perform() failed: " + std::string(curl_easy_strerror(res)) + "\" } ");
+            // Upload has been cancelled
+            if(prog.cancel)
+                return std::pair<int, std::string>(1, "{\"detail\":\" Canceled by the user\" } ");
+            else
+                return std::pair<int, std::string>(1, "{\"detail\":\"curl_easy_perform() failed: " + std::string(curl_easy_strerror(res)) + "\" } ");
         }
         else {
             curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);