{"record":{"id":"9bc58375fe4ca362","repo":"iflytek/astron-agent","slug":"please-enter-chat-content","errorCode":null,"errorMessage":"Please enter chat content","messagePattern":"Please enter chat content","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"console/backend/hub/src/main/java/com/iflytek/astron/console/hub/controller/chat/ChatMessageController.java","lineNumber":136,"sourceCode":"     * Validate the validity of chat request\n     *\n     * @param chatId Chat room ID, may be null\n     * @param text Chat text content, may be null or blank\n     * @param sseId Server-sent events ID, identifies current connection\n     * @param sseEmitter Server-sent events emitter, used to send messages to client\n     * @return Returns valid result if validation passes, otherwise returns invalid result\n     */\n    private ValidationResult validateChatRequest(Long chatId, String text, String sseId, SseEmitter sseEmitter) {\n        if (chatId == null) {\n            log.warn(\"chatId is empty, sseId: {}\", sseId);\n            SseEmitterUtil.sendError(sseEmitter, \"Chat ID cannot be empty\");\n            SseEmitterUtil.sendEndAndComplete(sseEmitter);\n            return ValidationResult.invalid();\n        }\n\n        if (StrUtil.isBlank(text)) {\n            log.warn(\"Chat content is empty, sseId: {}, chatId: {}\", sseId, chatId);\n            SseEmitterUtil.sendError(sseEmitter, \"Please enter chat content\");\n            SseEmitterUtil.sendEndAndComplete(sseEmitter);\n            return ValidationResult.invalid();\n        }\n\n        return ValidationResult.valid();\n    }\n\n    /**\n     * Validate chat context\n     *\n     * @param chatId Chat ID\n     * @param sseId Server-sent events ID\n     * @param sseEmitter Server-sent events emitter\n     * @return Valid chat context or null\n     */\n    private ChatContext validateChatContext(Long chatId, Long requestId, String sseId, SseEmitter sseEmitter) {\n        String uid = RequestContextUtil.getUID();\n","sourceCodeStart":118,"sourceCodeEnd":154,"githubUrl":"https://github.com/iflytek/astron-agent/blob/5e758547a83371a5a4b29dadf4ac03e8dd527635/console/backend/hub/src/main/java/com/iflytek/astron/console/hub/controller/chat/ChatMessageController.java#L118-L154","documentation":"The chat message endpoint requires non-blank message text. When the text field is null, empty, or whitespace-only, validateChatRequest sends 'Please enter chat content' over the SSE emitter and closes the stream. It prevents dispatching empty user turns to the agent engine.","triggerScenarios":"Calling the chat message send endpoint with text that is null, \"\", or only whitespace (StrUtil.isBlank(text)).","commonSituations":"User presses enter on an empty input box; frontend trims/strips content accidentally (e.g. markdown-only content removed); paste of only whitespace; form state not synchronized before submit.","solutions":["Guard in the UI: disable send until trimmed text length > 0","Trim and validate message text client-side before opening the SSE request","If sending attachments-only turns, use the appropriate endpoint rather than blank text"],"exampleFix":"// before\nconst content = editor.getText();\nsend(content);\n// after\nconst content = editor.getText().trim();\nif (!content) return; // do not call send\nsend(content);","handlingStrategy":"validation","validationCode":"if (!text || text.trim().length === 0) return; // skip send","typeGuard":"function hasContent(s) { return typeof s === 'string' && s.trim().length > 0; }","tryCatchPattern":null,"preventionTips":["Trim user input before sending","Disable send button for blank input","Handle IME composition state so empty commits are not sent"],"tags":["sse","validation","chat","empty-input"],"backgroundTag":"empty-required-field","analyzedSha":"5e758547a83371a5a4b29dadf4ac03e8dd527635","analyzedAt":"2026-09-12T08:03:51.356Z","contentChangedAt":"2026-09-12T08:03:51.356Z","schemaVersion":2},"datasetVersion":"2026-09-15T23:17:13.987Z"}