A bunch of fixes and improvements

src/pix360core/classes/stitching.py

@@ -145,7 +145,7 @@ class BlenderStitcher(BaseStitcher):
                 raise StitchingError(f"cube2sphere stitching failed for conversion {files[0].conversion.id}")
 
             with (Path(tempdir) / "out0001.png").open("rb") as f:
-                result = File.objects.create(conversion=files[0].conversion, file=ContentFile(f.read(), name="result.png"))
+                result = File.objects.create(conversion=files[0].conversion, file=ContentFile(f.read(), name="result.png"), mime_type="image/png")
 
             return result
 
@@ -243,7 +243,7 @@ class PILStitcher(BaseStitcher):
         PIL.Image.frombytes("RGB", (t_width, t_height), bytes(raw)).save(bio, "PNG")
         bio.seek(0)
 
-        result = File.objects.create(conversion=files[0].conversion, file=ContentFile(output, name="result.png"))
+        result = File.objects.create(conversion=files[0].conversion, file=ContentFile(output, name="result.png", mime_type="image/png"))
 
         return result
 
@@ -292,7 +292,7 @@ class PILStitcher(BaseStitcher):
         result.save(bio, "PNG")
         bio.seek(0)
 
-        result_file = File.objects.create(conversion=files[0][0].conversion, file=ContentFile(bio.read(), name="result.png"))
+        result_file = File.objects.create(conversion=files[0][0].conversion, file=ContentFile(bio.read(), name="result.png"), mime_type="image/png")
         return result_file
 
 

src/pix360core/models/content.py

@@ -1,6 +1,7 @@
 from django.db import models
 from django.contrib.auth import get_user_model
 
+import mimetypes
 import uuid
 
 def file_upload_path(instance, filename) -> str:
@@ -46,6 +47,7 @@ class ConversionStatus(models.IntegerChoices):
     PROCESSING = 1
     DONE = 2
     FAILED = -1
+    DISMISSED = -2
 
     DOWNLOADING = 10
     STITCHING = 11
@@ -82,4 +84,18 @@ class Conversion(models.Model):
         Raises:
             File.DoesNotExist: If no result file exists
         """
-        return File.objects.get(conversion=self, is_result=True)
+        return File.objects.get(conversion=self, is_result=True)
+
+    def get_result_filename(self) -> str:
+        """Get the final filename for the result file
+
+        Returns:
+            str: Filename for the result file
+
+        Raises:
+            File.DoesNotExist: If no result file exists
+        """
+        
+        basename = "".join([c for c in self.title if c.isalnum() or c in "._- "])
+        extension = mimetypes.guess_extension(self.result.mime_type)
+        return f"{basename}{extension}"

src/pix360core/static/js/worker.js

@@ -2,6 +2,8 @@ $("#options").hide();
 
 $body = $("body");
 
+var intervals = {};
+
 function toggleOptions() {
   $("#options").toggle();
 }
@@ -22,6 +24,51 @@ function deletecard(jobid) {
   }
 }
 
+function checkServerForFile(jobid, title, interval) {
+    $.ajax({
+      type: "GET",
+      cache: false,
+      url: "/status/" + jobid,
+      statusCode: {
+        403: function () {
+          Notification.requestPermission(function (permission) {
+            if (permission === "granted") {
+              var notification = new Notification("PIX360", {
+                body: "Your session has expired. Please log in again.",
+              });
+            }
+          });
+          window.location.href = "/";
+        },
+        404: function () {
+          clearInterval(intervals[jobid]);
+          failcard(jobid, title);
+          return;
+        },
+        200: function (data, tstatus, xhr) {
+          if (data.status == "completed") {
+            clearInterval(intervals[jobid]);
+            finishcard(
+              jobid,
+              title,
+              data.content_type == "video/mp4"
+            );
+            return;
+          } else if (data.status == "failed") {
+            clearInterval(intervals[jobid]);
+            failcard(jobid, title);
+            return;
+          }
+        },
+        500: function () {
+          clearInterval(intervals[jobid]);
+          failcard(jobid, title);
+          return;
+        },
+      },
+    });
+}
+
 function addcard(jobid, title) {
   var text =
     '<div class="col-sm-3" id="' +
@@ -33,6 +80,18 @@ function addcard(jobid, title) {
   $("html,body").animate({ scrollTop: $("#" + jobid).offset().top });
 }
 
+function restartconversion(jobid, title) {
+  $.ajax({
+    type: "GET",
+    url: "/retry/" + jobid,
+    success: function (msg) {
+      var interval = setInterval(checkServerForFile, 3000, msg.id, title);
+      intervals[msg.id] = interval;
+      addcard(msg.id, title);
+    },
+  });
+}
+
 function failcard(jobid, title) {
   Notification.requestPermission(function (permission) {
     if (permission === "granted") {
@@ -44,7 +103,9 @@ function failcard(jobid, title) {
   var text =
     '<div class="card"> <div style="text-align: center; color: red; font-weight: bold;" class="card-block">' +
     title +
-    ': Export failed.</div><div style="text-align: center;" class="card-block"> <a style="color: white;" onclick="deletecard(\'' +
+    ': Export failed.</div><div style="text-align: center;" class="card-block"><a style="color: white;" onclick="restartconversion (\'' +
+    jobid + '\', \'' + title +
+    '\');" class="btn btn-info">Retry</a> <a style="color: white;" onclick="deletecard(\'' +
     jobid +
     '\');" class="btn btn-danger">Hide</a></div> </div>';
   $("#" + jobid).html(text);
@@ -61,24 +122,26 @@ function finishcard(jobid, title, video) {
   var text =
     '<div class="card"> <img ' +
     (video ? 'id="' + jobid + '-thumb"' : "") +
-    ' class="card-img-top img-fluid" src="/getjob/' +
+    ' class="card-img-top img-fluid" download src="/download/' +
     jobid +
     (video ? "-thumb" : "") +
     '" alt="Final ' +
     (video ? "Video" : "Image") +
     '"><div style="text-align: center; font-weight: bold;" class="card-block">' +
     title +
-    '</div> <div style="text-align: center; color: white;" class="card-block"> <a href="/getjob/' +
+    '</div> <div style="text-align: center; color: white;" class="card-block"><a style="color: white;" onclick="restartconversion (\'' +
+    jobid + '\', \'' + title +
+    '\');" class="btn btn-info">Retry</a><a href="/download/' +
     jobid +
     '" class="btn btn-primary">Download</a> <a onclick="deletecard(\'' +
     jobid +
-    '\');" class="btn btn-danger">Hide</a></div> </div>';
+    '\');" class="btn btn-danger">Hide</a> </div> </div>';
   $("#" + jobid).html(text);
 
   var counter = 0;
   var interval = setInterval(function () {
     var image = document.getElementById(jobid + "-thumb");
-    image.src = "/getjob/" + jobid + "-thumb?rand=" + Math.random();
+    image.src = "/download/" + jobid + "-thumb?rand=" + Math.random();
     if (++counter === 10) {
       window.clearInterval(interval);
     }
@@ -95,57 +158,34 @@ $("#theform").submit(function (event) {
       success: function (msg) {
         var title = $("#title").val() ? $("#title").val() : "No title";
         var interval = setInterval(checkServerForFile, 3000, msg.id, title);
-        window.panaxworking = false;
+        intervals[msg.id] = interval;
         addcard(msg.id, title);
-
-        function checkServerForFile(jobid, title) {
-          if (!window.panaxworking) {
-            window.panaxworking = true;
-            $.ajax({
-              type: "GET",
-              cache: false,
-              url: "/status/" + jobid,
-              statusCode: {
-                403: function () {
-                  window.location.href = "/";
-                },
-                404: function () {
-                  clearInterval(interval);
-                  failcard(jobid, title);
-                  return;
-                },
-                200: function (data, tstatus, xhr) {
-                  if (data.status == "finished") {
-                    clearInterval(interval);
-                    finishcard(
-                      jobid,
-                      title,
-                      data.content_type == "video/mp4"
-                    );
-                    return;
-                  } else if (data.status == "failed") {
-                    clearInterval(interval);
-                    failcard(jobid, title);
-                    return;
-                  }
-                },
-                500: function () {
-                  clearInterval(interval);
-                  failcard(jobid, title);
-                  return;
-                },
-              },
-            });
-            window.panaxworking = false;
-          }
-        }
       },
     });
   }
 });
 
+function initialize() {
+  $.ajax({
+    type: "GET",
+    url: "/list",
+    success: function (msg) {
+      for (var i = 0; i < msg["conversions"].length; i++) {
+        var job = msg["conversions"][i];
+        if (job.status >= 0) {
+          var title = job.title ? job.title : "No title";
+          addcard(job.id, title);
+          var interval = setInterval(checkServerForFile, 3000, job.id, title);
+          intervals[job.id] = interval;
+        }
+      }
+    }
+  });
+}
+
 $(document).ready(function () {
   if (Notification.permission !== "granted") {
     Notification.requestPermission();
-  }
+  };
+  initialize();
 });

src/pix360core/urls.py

@@ -1,6 +1,6 @@
 from django.urls import path
 
-from .views import ConverterView, StartConversionView, ConversionStatusView, ConversionLogView, ConversionListView, ConversionDeleteView, ConversionResultView
+from .views import ConverterView, StartConversionView, ConversionStatusView, ConversionLogView, ConversionListView, ConversionDeleteView, ConversionResultView, ConversionRetryView, ConversionDownloadView
 
 urlpatterns = [
     path('', ConverterView.as_view(), name='converter'),
@@ -10,4 +10,6 @@ urlpatterns = [
     path('list', ConversionListView.as_view(), name='conversion_list'),
     path('delete/<uuid:id>', ConversionDeleteView.as_view(), name='conversion_delete'),
     path('result/<uuid:id>', ConversionResultView.as_view(), name='conversion_result'),
+    path('retry/<uuid:id>', ConversionRetryView.as_view(), name='conversion_retry'),
+    path('download/<uuid:id>', ConversionDownloadView.as_view(), name='conversion_download'),
 ]

src/pix360core/views.py

@@ -47,7 +47,7 @@ class ConversionStatusView(LoginRequiredMixin, View):
 
         if conversion.status == ConversionStatus.DONE:
             response['status'] = "completed"
-            response['result'] = conversion.result.file.path
+            response['result'] = conversion.result.file.url
             response['content_type'] = conversion.result.mime_type
         elif conversion.status == ConversionStatus.FAILED:
             response['status'] = "failed"
@@ -127,7 +127,49 @@ class ConversionDeleteView(LoginRequiredMixin, View):
                 'error': 'Conversion not found'
             }, status=404)
         
-        conversion.user = None
+        conversion.status = ConversionStatus.DISMISSED
         conversion.save()
         
-        return JsonResponse({})
+        return JsonResponse({})
+
+class ConversionRetryView(LoginRequiredMixin, View):
+    """View for retrying a conversion
+    """
+    def get(self, request, *args, **kwargs):
+        """Handle the POST request
+        """
+        conversion = Conversion.objects.filter(id=kwargs['id']).first()
+        if not conversion or not (conversion.user == request.user):
+            return JsonResponse({
+                'error': 'Conversion not found'
+            }, status=404)
+        
+        new_conversion = Conversion.objects.create(url=conversion.url, title=conversion.title, user=request.user)
+
+        return JsonResponse({
+            'id': new_conversion.id
+        })
+        
+class ConversionDownloadView(LoginRequiredMixin, View):
+    """View for downloading a conversion
+    """
+    def get(self, request, *args, **kwargs):
+        """Handle the GET request
+        """
+        conversion = Conversion.objects.filter(id=kwargs['id']).first()
+        if not conversion or not (conversion.user == request.user):
+            return JsonResponse({
+                'error': 'Conversion not found'
+            }, status=404)
+        
+        file = conversion.result
+        if not file:
+            return JsonResponse({
+                'error': 'Conversion not done'
+            }, status=404)
+
+        content = file.file.read()
+
+        response = HttpResponse(content, content_type=file.mime_type)
+        response['Content-Disposition'] = f'attachment; filename="{conversion.get_result_filename()}"'
+        return response

src/pix360core/worker.py

@@ -3,6 +3,7 @@ from .models import Conversion, File, ConversionStatus
 from .classes import ConversionError
 
 from django.conf import settings
+from django.db import transaction
 
 import multiprocessing
 import logging
@@ -65,30 +66,33 @@ class Worker(multiprocessing.Process):
         """
         while True:
             try:
-                conversion = Conversion.objects.filter(status=ConversionStatus.PENDING).first()
+                with transaction.atomic():
+                    conversion = Conversion.objects.select_for_update().filter(status=ConversionStatus.PENDING).first()
                 
-                if conversion:
+                    if conversion:
-                    conversion.status = ConversionStatus.PROCESSING
+                        conversion.status = ConversionStatus.PROCESSING
-                    conversion.save()
-                    self.logger.info(f"Processing conversion {conversion.id}")
-                
-                    try:
-                        result = self.process_conversion(conversion)
-                        result.is_result = True
-                        result.save()
-                        conversion.status = ConversionStatus.DONE
                         conversion.save()
-                        self.logger.info(f"Conversion {conversion.id} done")
-                    except Exception as e:
-                        conversion.status = ConversionStatus.FAILED
-                        conversion.log = traceback.format_exc()
-                        conversion.save()
-                        self.logger.error(f"Conversion {conversion.id} failed: {e}")
-                        self.logger.debug(traceback.format_exc())
 
-                else:
+                    else:
-                    self.logger.debug("No conversion to process")
+                        self.logger.debug("No conversion to process")
-                    time.sleep(1)
+                        time.sleep(1)
+                        continue
+
+                self.logger.info(f"Processing conversion {conversion.id}")
+            
+                try:
+                    result = self.process_conversion(conversion)
+                    result.is_result = True
+                    result.save()
+                    conversion.status = ConversionStatus.DONE
+                    conversion.save()
+                    self.logger.info(f"Conversion {conversion.id} done")
+                except Exception as e:
+                    conversion.status = ConversionStatus.FAILED
+                    conversion.log = traceback.format_exc()
+                    conversion.save()
+                    self.logger.error(f"Conversion {conversion.id} failed: {e}")
+                    self.logger.debug(traceback.format_exc())
 
             except Exception as e:
                 self.logger.error(f"Worker error: {e}")