{"record":{"id":"aa1fef81f5c59e7f","repo":"cefsharp/CefSharp","slug":"unable-to-load-byte-with-length-0","errorCode":null,"errorMessage":"Unable to load byte[] with length 0.","messagePattern":"Unable to load byte\\[\\] with length 0\\.","errorType":"validation","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"CefSharp/Internals/ByteArrayResourceHandler.cs","lineNumber":48,"sourceCode":"        /// Initializes a new instance of the <see cref=\"ByteArrayResourceHandler\"/> class.\n        /// </summary>\n        /// <param name=\"mimeType\">mimeType</param>\n        /// <param name=\"data\">byte array</param>\n        public ByteArrayResourceHandler(string mimeType, byte[] data)\n        {\n            if (string.IsNullOrEmpty(mimeType))\n            {\n                throw new ArgumentNullException(\"mimeType\", \"Please provide a valid mimeType\");\n            }\n\n            if (data == null)\n            {\n                throw new ArgumentNullException(\"data\", \"Please provide a valid array\");\n            }\n\n            if (data.Length == 0)\n            {\n                throw new Exception(\"Unable to load byte[] with length 0.\");\n            }\n\n            MimeType = mimeType;\n            Data = data;\n        }\n\n        bool IResourceHandler.ProcessRequest(IRequest request, ICallback callback)\n        {\n            //Should never be called\n            throw new NotImplementedException(\"This method should never be called\");\n        }\n\n        void IResourceHandler.GetResponseHeaders(IResponse response, out long responseLength, out string redirectUrl)\n        {\n            //Should never be called\n            throw new NotImplementedException(\"This method should never be called\");\n        }\n","sourceCodeStart":30,"sourceCodeEnd":66,"githubUrl":"https://github.com/cefsharp/CefSharp/blob/16bc6e0711a4945be17e8bc4bc7ccf9469f3fdec/CefSharp/Internals/ByteArrayResourceHandler.cs#L30-L66","documentation":"Thrown by the ByteArrayResourceHandler constructor when the data array is non-null but has length 0. A zero-length body is treated as invalid input because a stream with no content produces a meaningless/empty response; the handler rejects it rather than letting CEF serve an empty body. Note this uses a base Exception (not ArgumentException).","triggerScenarios":"Constructing new ByteArrayResourceHandler(\"text/html\", new byte[0]) or passing Encoding.UTF8.GetBytes(\"\") (empty string), an emptied MemoryStream.ToArray(), or a collection that yielded no bytes.","commonSituations":"Rendering a template that produced an empty string; serializing an object whose JSON output was unexpectedly empty; reading a file/resource that was truncated to zero bytes; a buffer that was allocated but never written.","solutions":["Validate data.Length > 0 before constructing the handler and supply real content or fall back to a default body.","If empty content is legitimately possible, return null from GetResourceHandler to let the request proceed with default handling.","Log/inspect the upstream content source (template, serializer) to find why it produced zero bytes."],"exampleFix":"// before\nvar bytes = Encoding.UTF8.GetBytes(RenderTemplate(model));\nreturn new ByteArrayResourceHandler(\"text/html\", bytes);\n\n// after\nvar bytes = Encoding.UTF8.GetBytes(RenderTemplate(model) ?? string.Empty);\nif (bytes.Length == 0) return null;\nreturn new ByteArrayResourceHandler(\"text/html\", bytes);","handlingStrategy":"validation","validationCode":"if (data == null || data.Length == 0)\n{\n    return null; // let default handling proceed, or log upstream\n}\nreturn new ByteArrayResourceHandler(mimeType, data);","typeGuard":"static bool HasByteArrayData(byte[] data) => data != null && data.Length > 0;","tryCatchPattern":null,"preventionTips":["Validate data.Length > 0 before constructing the handler.","Inspect template/serialization output that unexpectedly yields empty content.","Fall back to null/default-handling rather than constructing a zero-length handler."],"tags":["resource-handler","validation","empty-data","constructor","cefsharp"],"backgroundTag":null,"analyzedSha":"16bc6e0711a4945be17e8bc4bc7ccf9469f3fdec","analyzedAt":"2026-08-13T19:57:05.828Z","schemaVersion":2},"datasetVersion":"2026-08-14T00:17:13.853Z"}