Moved logic for max file path length in file storage provider (#8603)

Co-authored-by: matteo.piovanelli <matteo.piovanelli@laser-group.com>

src/Orchard.Web/Modules/Orchard.MediaProcessing/Services/ImageProfileManager.cs

@@ -171,6 +171,8 @@ namespace Orchard.MediaProcessing.Services {
                                             }
                                         }
                                     }
+                                    // the storage provider may have altered the filepath
+                                    filterContext.FilePath = newFile.GetPath();
                                 }
                             }
                             catch(Exception e) {

src/Orchard/FileSystems/Media/FileSystemStorageProvider.cs

@@ -34,10 +34,27 @@ namespace Orchard.FileSystems.Media {
             _publicPath = appPath + "Media/" + settings.Name + "/";
 
             T = NullLocalizer.Instance;
+            MaxPathLength = 260;
         }
 
         public Localizer T { get; set; }
 
+        public int MaxPathLength {
+            get; set;
+            // The public setter allows injecting this from Sites.MyTenant.Config or Sites.config, by using
+            // an AutoFac component:
+            /*
+             <component instance-scope="per-lifetime-scope"
+                type="Orchard.FileSystems.Media.FileSystemStorageProvider, Orchard.Framework"
+                service="Orchard.FileSystems.Media.IStorageProvider">
+                <properties>
+                    <property name="MaxPathLength" value="500" />
+                </properties>
+            </component>
+
+             */
+        }
+
         /// <summary>
         /// Maps a relative path into the storage path.
         /// </summary>
@@ -335,6 +352,17 @@ namespace Orchard.FileSystems.Media {
             if (!Directory.Exists(dirName)) {
                 Directory.CreateDirectory(dirName);
             }
+            //Path.GetFileNameWithoutExtension(fileInfo.Name)
+            // If absolute path is longer than the maximum path length (260 characters), file cannot be saved.
+            if (fileInfo.FullName.Length > MaxPathLength) {
+                var fileName = Path.GetFileNameWithoutExtension(fileInfo.Name);
+                var extension = fileInfo.Extension;
+                // try to generate a shorter path for the file
+                var nameHash = fileName.GetHashCode().ToString("x");
+                // Hopefully this new path is short enough now
+                path = Combine(Path.GetDirectoryName(path), nameHash + extension);
+                fileInfo = new FileInfo(MapStorage(path));
+            }
             File.WriteAllBytes(fileInfo.FullName, new byte[0]);
 
             return new FileSystemStorageFile(Fix(path), fileInfo);