{"record":{"id":"c9b80aecc9a4a5a4","repo":"jeecgboot/JeecgBoot","slug":"error-c9b80a","errorCode":null,"errorMessage":"发送消息失败,读取文件异常:","messagePattern":"发送消息失败,读取文件异常:","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"jeecg-boot/jeecg-boot-module/jeecg-boot-module-airag/src/main/java/org/jeecg/modules/airag/llm/handler/AIChatHandler.java","lineNumber":499,"sourceCode":"            if (matcher.matches()) {\n                // 来源于网络\n                imageContents.add(ImageContent.from(imageUrl));\n            } else {\n                // 本地文件\n                String filePath = uploadpath + File.separator + imageUrl;\n                // 读取文件并转换为 base64 编码字符串\n                try {\n                    SsrfFileTypeFilter.checkPathTraversal(filePath);\n                    Path path = Paths.get(filePath);\n                    byte[] fileContent = Files.readAllBytes(path);\n                    String base64Data = Base64.getEncoder().encodeToString(fileContent);\n                    // 获取文件的 MIME 类型\n                    String mimeType = Files.probeContentType(path);\n                    // 构建 ImageContent 对象\n                    imageContents.add(ImageContent.from(base64Data, mimeType));\n                } catch (IOException e) {\n                    log.error(\"读取文件失败: {}\", imageUrl, e);\n                    throw new RuntimeException(\"发送消息失败,读取文件异常:\" + e.getMessage(), e);\n                }\n            }\n        }\n        return imageContents;\n    }\n\n    //================================================= begin【QQYUN-12145】【AI】AI 绘画创作 ========================================\n    /**\n     * 文本生成图片\n     * @param modelId\n     * @param messages\n     * @param params\n     * @return\n     */\n    @Override\n    public List<Map<String, Object>> imageGenerate(String modelId, String messages, AIChatParams params) {\n        AssertUtils.assertNotEmpty(\"至少发送一条消息\", messages);\n        //AssertUtils.assertNotEmpty(\"请选择图片大模型\", modelId);","sourceCodeStart":481,"sourceCodeEnd":517,"githubUrl":"https://github.com/jeecgboot/JeecgBoot/blob/96fb33f5ec68516da0b0147da06b2eb0419e063a/jeecg-boot/jeecg-boot-module/jeecg-boot-module-airag/src/main/java/org/jeecg/modules/airag/llm/handler/AIChatHandler.java#L481-L517","documentation":"This error is thrown by AIChatHandler.buildImageContents() when an IOException occurs while reading a local image file for base64 encoding. The method constructs a file path by concatenating uploadpath with the imageUrl, reads the file bytes, encodes to base64, and probes the MIME type. If Files.readAllBytes or Files.probeContentType throws IOException, it is wrapped in a RuntimeException.","triggerScenarios":"A chat request with local image attachments where Files.readAllBytes(path) fails due to: file not found at the expected path, permission denied, file is a directory, disk I/O error, or the path is invalid after traversal checks pass. SsrfFileTypeFilter.checkPathTraversal is called first but only checks for traversal patterns, not existence.","commonSituations":"The image file was deleted or moved between upload and chat processing. The uploadpath configuration points to a directory that doesn't exist or has wrong permissions. The imageUrl contains a relative path that doesn't resolve correctly. Disk space or I/O issues. The file exists but is locked by another process.","solutions":["Verify the image file exists at uploadpath + File.separator + imageUrl on the server filesystem.","Check that the application process has read permissions on the upload directory and files.","Confirm the jeecg.path.upload configuration matches the actual upload directory.","If files are stored on a network share, verify mount stability and connectivity.","Add existence and readability checks before Files.readAllBytes for better error messages."],"exampleFix":"// before\nbyte[] fileContent = Files.readAllBytes(path);\n\n// after — check existence and readability first\nif (!Files.exists(path) || !Files.isReadable(path)) {\n    throw new RuntimeException(\"Image file not found or not readable: \" + imageUrl);\n}\nbyte[] fileContent = Files.readAllBytes(path);","handlingStrategy":"validation","validationCode":"// Before reading, verify the file exists and is readable\nString filePath = uploadpath + File.separator + imageUrl;\nPath path = Paths.get(filePath);\nif (!Files.exists(path)) {\n    log.warn(\"Image file does not exist: {}\", filePath);\n    return Collections.emptyList(); // or throw a descriptive error\n}\nif (!Files.isReadable(path)) {\n    log.warn(\"Image file is not readable: {}\", filePath);\n    return Collections.emptyList();\n}\nSsrfFileTypeFilter.checkPathTraversal(filePath);","typeGuard":"public static boolean isImageReadable(String uploadpath, String imageUrl) {\n    try {\n        Path path = Paths.get(uploadpath + File.separator + imageUrl);\n        return Files.exists(path) && Files.isRegularFile(path) && Files.isReadable(path);\n    } catch (InvalidPathException e) {\n        return false;\n    }\n}","tryCatchPattern":"try {\n    byte[] fileContent = Files.readAllBytes(path);\n    String base64Data = Base64.getEncoder().encodeToString(fileContent);\n    imageContents.add(ImageContent.from(base64Data, mimeType));\n} catch (IOException e) {\n    log.error(\"Failed to read image file: {}\", imageUrl, e);\n    // Skip this image rather than failing the entire request\n    // Or throw with a more specific message\n    throw new RuntimeException(\"Image read failed for '\" + imageUrl + \"': \" + e.getMessage(), e);\n}","preventionTips":["Verify file existence before attempting to read","Ensure uploadpath configuration matches the actual file storage location","Check file permissions for the application process","Handle missing images gracefully — skip or return partial results rather than failing the entire chat"],"tags":["airag","file-io","image-processing","upload"],"backgroundTag":null,"analyzedSha":"96fb33f5ec68516da0b0147da06b2eb0419e063a","analyzedAt":"2026-08-14T00:04:16.786Z","schemaVersion":2},"datasetVersion":"2026-08-14T00:17:13.853Z"}