run.java

public void run() {

    OutputStream dataOut = null;

    try (BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
         PrintWriter out = new PrintWriter(client.getOutputStream())) {

        Map<String, String> requestHeaders = parseRequestHeaders(in);

        String method = requestHeaders.get(METHOD);
        String resource = requestHeaders.get(RESOURCE);
        String protocol = requestHeaders.get(PROTOCOL);

        String status;
        String resolvedResourcePath;
        File outputFile;

        if (resource.contains("./") || resource.contains("../")) {
            status = Http.Status.BAD_REQUEST;
            outputFile = new File(this.serverRoot, BAD_REQUEST);
        } else if (Http.Method.GET.equals(method)) {
            resolvedResourcePath = resolveResource(resource);
            outputFile = new File(this.webRoot, resolvedResourcePath);

            if (!outputFile.exists()) {
                status = Http.Status.NOT_FOUND;
                outputFile = new File(this.serverRoot, NOT_FOUND);
            } else {
                if (outputFile.isDirectory()) {
                    outputFile = new File(outputFile, INDEX_HTML);
                }
                if (outputFile.exists()) {
                    status = Http.Status.OK;
                } else {
                    status = Http.Status.NOT_FOUND;
                    outputFile = new File(this.serverRoot, NOT_FOUND);
                }
            }
        } else {
            outputFile = new File(this.serverRoot, NOT_IMPLEMENTED);
            status = Http.Status.NOT_IMPLEMENTED;
        }

        ZonedDateTime now = ZonedDateTime.now(ZoneId.of("GMT"));
        String date = now.format(HTTP_FORMATTER);

        String mimeType = Files.probeContentType(outputFile.toPath());
        byte[] data = readFile(outputFile);

        // write the headers
        writeResponseHeaders(out, protocol, status, mimeType, date, data.length, getContentEncoding(requestHeaders));

        // write the outputFile contents
        dataOut = getDataOutputStream(requestHeaders, client.getOutputStream());
        dataOut.write(data, 0, data.length);
        if (dataOut instanceof GZIPOutputStream) {
            ((GZIPOutputStream) dataOut).finish();
        } else {
            dataOut.flush();
        }

        // log the request
        log(client.getInetAddress(), date, method, status, requestHeaders.getOrDefault(UA, ""), resource);
    } catch (IOException e) {
        System.out.println(e.getMessage());
    } finally {
        if (dataOut != null) {
            try {
                dataOut.close();
            } catch (IOException ex) {
                System.out.println(ex.getMessage());
            }
        }
    }
}