用于解密 GZIP 正文的 Rest Api

Question

一个API以GZIP的形式在正文中发送大量数据，我需要创建 rest API 来解密并将其保存在数据库中，但我无法解密数据。`@GetMapping    public void hello() throws IOException {        String payload = "{\n" +                "    \"name1\": \"shrikant\",\n" +                "    \"date\": \"Fri Apr 05 15:48:59 IST 2019\"\n" +                "}";        String urlStr = "http://localhost:8080/hello";        URL url = new URL(urlStr);        HttpURLConnection conn = (HttpURLConnection) url.openConnection();        conn.setReadTimeout(60000);        conn.setConnectTimeout(60000);        conn.setRequestMethod("POST");        conn.setDoInput(true);        conn.setDoOutput(true);        conn.setRequestProperty("Accept", "application/json");        conn.setRequestProperty("Content-Type", "application/json");        conn.addRequestProperty("Content-Encoding", "gzip");        OutputStream os = conn.getOutputStream();        GZIPOutputStream gos = new GZIPOutputStream(os);        gos.write(payload.getBytes(StandardCharsets.UTF_8));        System.out.println("payload " +         Arrays.toString(payload.getBytes(StandardCharsets.UTF_8)));        os.close();        int responseCode = conn.getResponseCode();    System.out.println("\nSending 'POST' request to URL : " + url);    System.out.println("Response Code : " + responseCode);    }`用于接收数据的 API。     @PostMapping("hello")    public byte[] hello1(HttpServletRequest request) throws IOException {        System.out.println("hi");        ByteArrayInputStream bis = new ByteArrayInputStream();        GZIPInputStream gis = new GZIPInputStream(bis);        BufferedReader br = new BufferedReader(new InputStreamReader(gis, "UTF-8"));        StringBuilder sb = new StringBuilder();        String line;        while((line = br.readLine()) != null) {            sb.append(line);        }    }但无法解密数据。如何解密请求。

Answer 1

在客户端，您应该在关闭输出流之前关闭 GZIP 输出流。

    gos.close();

    os.close();

在服务器端，您应该使用来自请求的输入流

    ServletInputStream inputStream = request.getInputStream();

    GZIPInputStream gis = new GZIPInputStream(inputStream);

    BufferedReader br = new BufferedReader(new InputStreamReader(gis, "UTF-8"));

    StringBuilder sb = new StringBuilder();

    String line;

    while((line = br.readLine()) != null) {

        sb.append(line);

    }

    System.out.println(sb.toString());

对于流，最好使用尝试资源blok，您不必记住关闭流。

    try (OutputStream os = conn.getOutputStream()) {

        try (GZIPOutputStream gos = new GZIPOutputStream(os)) {

            gos.write(payload.getBytes(StandardCharsets.UTF_8));

        }

    }