Examples with MasterWebUILogs alluxio.wire.MasterWebUILogs used on opensource projects

Example 1 with MasterWebUILogs

use of alluxio.wire.MasterWebUILogs in project alluxio by Alluxio.

the class AlluxioMasterRestServiceHandler method getWebUILogs.

/**
 * Gets Web UI logs page data.
 *
 * @param requestPath the request path
 * @param requestOffset the request offset
 * @param requestEnd the request end
 * @param requestLimit the request limit
 * @return the response object
 */
@GET
@Path(WEBUI_LOGS)
public Response getWebUILogs(@DefaultValue("") @QueryParam("path") String requestPath, @DefaultValue("0") @QueryParam("offset") String requestOffset, @DefaultValue("") @QueryParam("end") String requestEnd, @DefaultValue("20") @QueryParam("limit") String requestLimit) {
    return RestUtils.call(() -> {
        FilenameFilter filenameFilter = (dir, name) -> name.toLowerCase().endsWith(".log");
        MasterWebUILogs response = new MasterWebUILogs();
        if (!ServerConfiguration.getBoolean(PropertyKey.WEB_FILE_INFO_ENABLED)) {
            return response;
        }
        response.setDebug(ServerConfiguration.getBoolean(PropertyKey.DEBUG)).setInvalidPathError("").setViewingOffset(0).setCurrentPath("");
        // response.setDownloadLogFile(1);
        // response.setBaseUrl("./browseLogs");
        // response.setShowPermissions(false);
        String logsPath = ServerConfiguration.getString(PropertyKey.LOGS_DIR);
        File logsDir = new File(logsPath);
        String requestFile = requestPath;
        if (requestFile == null || requestFile.isEmpty()) {
            // List all log files in the log/ directory.
            List<UIFileInfo> fileInfos = new ArrayList<>();
            File[] logFiles = logsDir.listFiles(filenameFilter);
            if (logFiles != null) {
                for (File logFile : logFiles) {
                    String logFileName = logFile.getName();
                    fileInfos.add(new UIFileInfo(new UIFileInfo.LocalFileInfo(logFileName, logFileName, logFile.length(), UIFileInfo.LocalFileInfo.EMPTY_CREATION_TIME, logFile.lastModified(), logFile.isDirectory()), ServerConfiguration.global(), new MasterStorageTierAssoc().getOrderedStorageAliases()));
                }
            }
            fileInfos.sort(UIFileInfo.PATH_STRING_COMPARE);
            response.setNTotalFile(fileInfos.size());
            try {
                int offset = Integer.parseInt(requestOffset);
                int limit = Integer.parseInt(requestLimit);
                limit = offset == 0 && limit > fileInfos.size() ? fileInfos.size() : limit;
                limit = offset + limit > fileInfos.size() ? fileInfos.size() - offset : limit;
                int sum = Math.addExact(offset, limit);
                fileInfos = fileInfos.subList(offset, sum);
                response.setFileInfos(fileInfos);
            } catch (NumberFormatException e) {
                response.setFatalError("Error: offset or limit parse error, " + e.getLocalizedMessage());
                return response;
            } catch (ArithmeticException e) {
                response.setFatalError("Error: offset or offset + limit is out of bound, " + e.getLocalizedMessage());
                return response;
            } catch (IllegalArgumentException e) {
                response.setFatalError(e.getLocalizedMessage());
                return response;
            }
        } else {
            // Request a specific log file.
            // Only allow filenames as the path, to avoid arbitrary local path lookups.
            requestFile = new File(requestFile).getName();
            response.setCurrentPath(requestFile);
            File logFile = new File(logsDir, requestFile);
            try {
                long fileSize = logFile.length();
                long relativeOffset = 0;
                long offset;
                try {
                    if (requestOffset != null) {
                        relativeOffset = Long.parseLong(requestOffset);
                    }
                } catch (NumberFormatException e) {
                // ignore the exception
                }
                // relative to the end of the file.
                if (requestEnd.equals("")) {
                    offset = relativeOffset;
                } else {
                    offset = fileSize - relativeOffset;
                }
                if (offset < 0) {
                    offset = 0;
                } else if (offset > fileSize) {
                    offset = fileSize;
                }
                String fileData;
                try (InputStream is = new FileInputStream(logFile)) {
                    fileSize = logFile.length();
                    int len = (int) Math.min(5L * Constants.KB, fileSize - offset);
                    byte[] data = new byte[len];
                    long skipped = is.skip(offset);
                    if (skipped < 0) {
                        // Nothing was skipped.
                        fileData = "Unable to traverse to offset; is file empty?";
                    } else if (skipped < offset) {
                        // Couldn't skip all the way to offset.
                        fileData = "Unable to traverse to offset; is offset larger than the file?";
                    } else {
                        // Read may not read up to len, so only convert what was read.
                        int read = is.read(data, 0, len);
                        if (read < 0) {
                            // Stream couldn't read anything, skip went to EOF?
                            fileData = "Unable to read file";
                        } else {
                            fileData = WebUtils.convertByteArrayToStringWithoutEscape(data, 0, read);
                        }
                    }
                }
                response.setFileData(fileData).setViewingOffset(offset);
            } catch (IOException e) {
                response.setInvalidPathError("Error: File " + logFile + " is not available " + e.getMessage());
            }
        }
        return response;
    }, ServerConfiguration.global());
}