Fixed the HEAD method crashing when the size of a resource is undefined

Author: AdrienCastex

lib/server/v2/commands/Head.js

@@ -35,7 +35,8 @@ var default_1 = (function () {
                                     ctx.setCode(WebDAVRequest_1.HTTPCodes.OK);
                                     ctx.response.setHeader('Accept-Ranges', 'bytes');
                                     ctx.response.setHeader('Content-Type', mimeType);
-                                    ctx.response.setHeader('Content-Length', size.toString());
+                                    if (size !== null && size !== undefined && size > -1)
+                                        ctx.response.setHeader('Content-Length', size.toString());
                                 }
                                 callback();
                             });

src/server/v2/commands/Head.ts

@@ -44,7 +44,8 @@ export default class implements HTTPMethod
                                         ctx.setCode(HTTPCodes.OK);
                                         ctx.response.setHeader('Accept-Ranges', 'bytes')
                                         ctx.response.setHeader('Content-Type', mimeType);
-                                        ctx.response.setHeader('Content-Length', size.toString());
+                                        if(size !== null && size !== undefined && size > -1)
+                                            ctx.response.setHeader('Content-Length', size.toString());
                                     }
                                     callback();
                                 })