Merge pull request #3 from creeperCN/fix/temp-file-and-webdav-bugs

fix: 修复空文件下载时 FileAlreadyExistsException 和 WebdavProtocol 调试代码遗留问题

Author: asforest

src/main/java/com/github/balloonupdate/mcpatch/client/Work.java

@@ -436,6 +436,10 @@ boolean run2(Servers server) throws IOException, McpatchBusinessException {
 
                     // 空文件不需要下载
                     if (f.length == 0) {
+                        // 如果临时文件已存在（上次更新中断），先删除再创建
+                        if (Files.exists(f.tempPath)) {
+                            Files.delete(f.tempPath);
+                        }
                         Files.createFile(f.tempPath);
                         continue;
                     }

src/main/java/com/github/balloonupdate/mcpatch/client/network/impl/WebdavProtocol.java

@@ -134,11 +134,6 @@ public void downloadFile(String path, Range range, String desc, Path writeTo, On
         try (ContentLengthInputStream input = response.stream) {
             long contentLength = input.getLength();
 
-            if (desc.length() > -999)
-//                throw new IOException("hahahaha");
-            throw new McpatchBusinessException("bbbbbbbbbb");
-//                throw new McpatchBusinessException("qqqqqqqqqqq", new IOException("hahahaha"));
-
             try (OutputStream output = Files.newOutputStream(writeTo)) {
                 byte[] buf = new byte[BytesUtils.chooseBufferSize(contentLength)];