swfupload.as

用flash做的网页上传工具

				// Process each selected file
				for (var i:Number = 0; i < file_reference_list.length; i++) {
					var file_item:FileItem = new FileItem(file_reference_list[i], this.movieName, this.file_index.length);
					this.file_index[file_item.index] = file_item;

					// Verify that the file is accessible. Zero byte files and possibly other conditions can cause a file to be inaccessible.
					var jsFileObj:Object = file_item.ToJavaScriptObject();
					var is_valid_file_reference:Boolean = (jsFileObj.filestatus !== FileItem.FILE_STATUS_ERROR);
					
					if (is_valid_file_reference) {
						// Check the size, if it's within the limit add it to the upload list.
						var size_result:Number = this.CheckFileSize(file_item);
						var is_valid_filetype:Boolean = this.CheckFileType(file_item);
						if(size_result == this.SIZE_OK && is_valid_filetype) {
							file_item.file_status = FileItem.FILE_STATUS_QUEUED;
							this.file_queue.push(file_item);
							this.queued_uploads++;
							num_files_queued++;
							this.Debug("Event: fileQueued : File ID: " + file_item.id);
							ExternalCall.FileQueued(this.fileQueued_Callback, file_item.ToJavaScriptObject());
						}
						else if (!is_valid_filetype) {
							file_item.file_reference = null; 	// Cleanup the object
							this.queue_errors++;
							this.Debug("Event: fileQueueError : File not of a valid type.");
							ExternalCall.FileQueueError(this.fileQueueError_Callback, this.ERROR_CODE_INVALID_FILETYPE, file_item.ToJavaScriptObject(), "File is not an allowed file type.");
						}
						else if (size_result == this.SIZE_TOO_BIG) {
							file_item.file_reference = null; 	// Cleanup the object
							this.queue_errors++;
							this.Debug("Event: fileQueueError : File exceeds size limit.");
							ExternalCall.FileQueueError(this.fileQueueError_Callback, this.ERROR_CODE_FILE_EXCEEDS_SIZE_LIMIT, file_item.ToJavaScriptObject(), "File size exceeds allowed limit.");
						}
						else if (size_result == this.SIZE_ZERO_BYTE) {
							file_item.file_reference = null; 	// Cleanup the object
							this.queue_errors++;
							this.Debug("Event: fileQueueError : File is zero bytes.");
							ExternalCall.FileQueueError(this.fileQueueError_Callback, this.ERROR_CODE_ZERO_BYTE_FILE, file_item.ToJavaScriptObject(), "File is zero bytes and cannot be uploaded.");
						}
					} else {
						file_item.file_reference = null; 	// Cleanup the object
						this.queue_errors++;
						this.Debug("Event: fileQueueError : File is zero bytes or FileReference is invalid.");
						ExternalCall.FileQueueError(this.fileQueueError_Callback, this.ERROR_CODE_ZERO_BYTE_FILE, file_item.ToJavaScriptObject(), "File is zero bytes or cannot be accessed and cannot be uploaded.");
					}
				}
			}
			
			this.Debug("Event: fileDialogComplete : Finished processing selected files. Files selected: " + file_reference_list.length + ". Files Queued: " + num_files_queued);
			ExternalCall.FileDialogComplete(this.fileDialogComplete_Callback, file_reference_list.length, num_files_queued);
		}

		
		/* ****************************************************************
			Externally exposed functions
		****************************************************************** */
		// Opens a file browser dialog that allows one file to be selected.
		private function SelectFile():void  {
			this.fileBrowserOne = new FileReference();
			this.fileBrowserOne.addEventListener(Event.SELECT, this.Select_One_Handler);
			this.fileBrowserOne.addEventListener(Event.CANCEL,  this.DialogCancelled_Handler);

			// Default file type settings
			var allowed_file_types:String = "*.*";
			var allowed_file_types_description:String = "All Files";

			// Get the instance settings
			if (this.fileTypes.length > 0) allowed_file_types = this.fileTypes;
			if (this.fileTypesDescription.length > 0)  allowed_file_types_description = this.fileTypesDescription;

			this.Debug("Event: fileDialogStart : Browsing files. Single Select. Allowed file types: " + allowed_file_types);
			ExternalCall.Simple(this.fileDialogStart_Callback);

			this.fileBrowserOne.browse([new FileFilter(allowed_file_types_description, allowed_file_types)]);
		}
		
		// Opens a file browser dialog that allows multiple files to be selected.
		private function SelectFiles():void {
			var allowed_file_types:String = "*.*";
			var allowed_file_types_description:String = "All Files";
			
			if (this.fileTypes.length > 0) allowed_file_types = this.fileTypes;
			if (this.fileTypesDescription.length > 0)  allowed_file_types_description = this.fileTypesDescription;

			this.Debug("Event: fileDialogStart : Browsing files. Multi Select. Allowed file types: " + allowed_file_types);
			ExternalCall.Simple(this.fileDialogStart_Callback);
			
			this.fileBrowserMany.browse([new FileFilter(allowed_file_types_description, allowed_file_types)]);
		}


		// Cancel the current upload and stops.  Doesn't advance the upload pointer. The current file is requeued at the beginning.
		private function StopUpload():void {
			if (this.current_file_item != null) {
				// Cancel the upload and re-queue the FileItem
				this.current_file_item.file_reference.cancel();

				this.current_file_item.file_status = FileItem.FILE_STATUS_QUEUED;
				
				// Remove the event handlers
				this.removeFileReferenceEventListeners(this.current_file_item);

				this.file_queue.unshift(this.current_file_item);
				var js_object:Object = this.current_file_item.ToJavaScriptObject();
				this.current_file_item = null;
				
				this.Debug("Event: uploadError: upload stopped. File ID: " + js_object.ID);
				ExternalCall.UploadError(this.uploadError_Callback, this.ERROR_CODE_UPLOAD_STOPPED, js_object, "Upload Stopped");
				this.Debug("Event: uploadComplete. File ID: " + js_object.ID);
				ExternalCall.UploadComplete(this.uploadComplete_Callback, js_object);
				
				this.Debug("StopUpload(): upload stopped.");
			} else {
				this.Debug("StopUpload(): No file is currently uploading. Nothing to do.");
			}
		}

		/* Cancels the upload specified by file_id
		 * If the file is currently uploading it is cancelled and the uploadComplete
		 * event gets called.
		 * If the file is not currently uploading then only the uploadCancelled event is fired.
		 * */
		private function CancelUpload(file_id:String):void {
			var file_item:FileItem = null;
			
			// Check the current file item
			if (this.current_file_item != null && (this.current_file_item.id == file_id || !file_id)) {
					this.current_file_item.file_reference.cancel();
					this.current_file_item.file_status = FileItem.FILE_STATUS_CANCELLED;
					this.upload_cancelled++;
					
					this.Debug("Event: uploadError: File ID: " + this.current_file_item.id + ". Cancelled current upload");
					ExternalCall.UploadError(this.uploadError_Callback, this.ERROR_CODE_FILE_CANCELLED, this.current_file_item.ToJavaScriptObject(), "File Upload Cancelled.");

					this.UploadComplete(false);
			} else if (file_id) {
					// Find the file in the queue
					var file_index:Number = this.FindIndexInFileQueue(file_id);
					if (file_index >= 0) {
						// Remove the file from the queue
						file_item = FileItem(this.file_queue[file_index]);
						file_item.file_status = FileItem.FILE_STATUS_CANCELLED;
						this.file_queue[file_index] = null;
						this.queued_uploads--;
						this.upload_cancelled++;
						
						// Cancel the file (just for good measure) and make the callback
						file_item.file_reference.cancel();
						this.removeFileReferenceEventListeners(file_item);
						file_item.file_reference = null;
						
						this.Debug("Event: uploadError : " + file_item.id + ". Cancelled queued upload");
						ExternalCall.UploadError(this.uploadError_Callback, this.ERROR_CODE_FILE_CANCELLED, file_item.ToJavaScriptObject(), "File Cancelled");

						// Get rid of the file object
						file_item = null;
					}
			} else {
				// Get the first file and cancel it
				while (this.file_queue.length > 0 && file_item == null) {
					// Check that File Reference is valid (if not make sure it's deleted and get the next one on the next loop)
					file_item = FileItem(this.file_queue.shift());	// Cast back to a FileItem
					if (typeof(file_item) == "undefined") {
						file_item = null;
						continue;
					}
				}
				
				if (file_item != null) {
					file_item.file_status = FileItem.FILE_STATUS_CANCELLED;
					this.queued_uploads--;
					this.upload_cancelled++;
					

					// Cancel the file (just for good measure) and make the callback
					file_item.file_reference.cancel();
					this.removeFileReferenceEventListeners(file_item);
					file_item.file_reference = null;

					this.Debug("Event: uploadError : " + file_item.id + ". Cancelled queued upload");
					ExternalCall.UploadError(this.uploadError_Callback, this.ERROR_CODE_FILE_CANCELLED, file_item.ToJavaScriptObject(), "File Cancelled");

					// Get rid of the file object
					file_item = null;
				}
				
			}

		}
		/*
		 This won't be used until Flex 3 comes out.
		private function SetCredentials(name:String, password:String):void {
			this.credentials_name = name;
			this.credentials_password = password;
		}
		*/
		private function GetStats():Object {
			return {
				in_progress : this.current_file_item == null ? 0 : 1,
				files_queued : this.queued_uploads,
				successful_uploads : this.successful_uploads,
				upload_errors : this.upload_errors,
				upload_cancelled : this.upload_cancelled,
				queue_errors : this.queue_errors
			};
		}
		private function SetStats(stats:Object):void {
			this.successful_uploads = typeof(stats["successful_uploads"]) === "number" ? stats["successful_uploads"] : this.successful_uploads;
			this.upload_errors = typeof(stats["upload_errors"]) === "number" ? stats["upload_errors"] : this.upload_errors;
			this.upload_cancelled = typeof(stats["upload_cancelled"]) === "number" ? stats["upload_cancelled"] : this.upload_cancelled;
			this.queue_errors = typeof(stats["queue_errors"]) === "number" ? stats["queue_errors"] : this.queue_errors;
		}

		private function GetFile(file_id:String):Object {
			var file_index:Number = this.FindIndexInFileQueue(file_id);
			if (file_index >= 0) {
				var file:FileItem = this.file_queue[file_index];
			} else {
				if (this.current_file_item != null) {
					file = this.current_file_item;
				} else {
					for (var i:Number = 0; i < this.file_queue.length; i++) {
						file = this.file_queue[i];
						if (file != null) break;
					}
				}
			}
			
			if (file == null) {
				return null;
			} else {
				return file.ToJavaScriptObject();
			}
			
		}
		
		private function GetFileByIndex(index:Number):Object {
			if (index < 0 || index > this.file_index.length - 1) {
				return null;
			} else {
				return this.file_index[index].ToJavaScriptObject();
			}
		}

		private function AddFileParam(file_id:String, name:String, value:String):Boolean {
			var item:FileItem = this.FindFileInFileIndex(file_id);
			if (item != null) {
				item.AddParam(name, value);
				return true;
			}
			else {
				return false;
			}
		}
		private function RemoveFileParam(file_id:String, name:String):Boolean {
			var item:FileItem = this.FindFileInFileIndex(file_id);
			if (item != null) {
				item.RemoveParam(name);
				return true;
			}
			else {
				return false;
			}
		}
		
		private function SetUploadURL(url:String):void {
			if (typeof(url) !== "undefined" && url !== "") {
				this.uploadURL = url;
			}
		}
		
		private function SetPostParams(post_object:Object):void {
			if (typeof(post_object) !== "undefined" && post_object !== null) {
				this.uploadPostObject = post_object;
			}
		}
		
		private function SetFileTypes(types:String, description:String):void {
			this.fileTypes = types;
			this.fileTypesDescription = description;
			
			this.LoadFileExensions(this.fileTypes);
		}

		// Sets the file size limit.  Accepts size values with units: 100 b, 1KB, 23Mb, 4 Gb
		// Parsing is not robust. "100 200 MB KB B GB" parses as "100 MB"
		private function SetFileSizeLimit(size:String):void {
			var value:Number = 0;
			var unit:String = "kb";
			
			// Trim the string
			var trimPattern:RegExp = /^\s*|\s*$/;
			
			size = size.toLowerCase();
			size = size.replace(trimPattern, "");

			
			// Get the value part
			var values:Array = size.match(/^\d+/);
			if (values !== null && values.length > 0) {
				value = parseInt(values[0]);
			}
			if (isNaN(value) || value < 0) value = 0;
			
			// Get the units part
			var units:Array = size.match(/(b|kb|mb|gb)/);
			if (units != null && units.length > 0) {
				unit = units[0];
			}
			
			// Set the multiplier for converting the unit to bytes
			var multiplier:Number = 1024;
			if (unit === "b")
				multiplier = 1;
			else if (unit === "mb")
				multiplier = 1048576;
			else if (unit === "gb")
				multiplier = 1073741824;
			
			this.fileSizeLimit = value * multiplier;
		}
		
		private function SetFileUploadLimit(file_upload_limit:Number):void {
			if (file_upload_limit < 0) file_upload_limit = 0;
			this.fileUploadLimit = file_upload_limit;
		}
		
		private function SetFileQueueLimit(file_queue_limit:Number):void {
			if (file_queue_limit < 0) file_queue_limit = 0;
			this.fileQueueLimit = file_queue_limit;
		}
		
		private function SetFilePostName(file_post_name:String):void {
			if (file_post_name != "") {
				this.filePostName = file_post_name;
			}
		}
		
		private function SetUseQueryString(use_query_string:Boolean):void {
			this.useQueryString = use_query_string;
		}
		
		private function SetRequeueOnError(requeue_on_error:Boolean):void {
			this.requeueOnError = requeue_on_error;
		}