//生成上传视频凭证示例代码

private static final String ACCESS_KEY = "替换为您的Access Key";
private static final String SECRET_KEY = "替换为您的Secret Key";
private static final String URL = "http://svc.suning.com/svc/api3/channel";

private static final String ENCODE = "UTF-8";

/**
 * 上传插件tokenUrl 实现
 * @return
 */
public void getUpTokenController(HttpServletRequest request, HttpServletResponse response) {
    //所有接收参数都在上传插件中自动产生，请保持一下获取参数代码
    String name = request.getParameter("name");
    String summary = request.getParameter("summary");
    String cover_img = request.getParameter("cover_img");
    String length = request.getParameter("length");
    String ppfeature = request.getParameter("ppfeature");

    if (name == null) name = "";
    if (summary == null) summary = "";
    if (cover_img == null) cover_img = "";
    if (length == null) length = "0";
    if (ppfeature == null) ppfeature = "";

    String result = addVod(name, summary,
        length, cover_img, ppfeature);

    response.setContentType("application/json;charset=utf-8");
    response.getOutputStream().write(result.getBytes("UTF-8"));
    response.getOutputStream().flush();
}

/**
 * 创建视频并获取上传凭证uptoken
 *
 * @param name        视频名称，
 * @param summary     视频简介，可为空
 * @param length      视频文件大小，单位Byte
 * @param coverImgUrl 封面图地址，可为空
 * @param ppfeature   文件特征值
 * @return 视频信息
 */
public static String addVod(String name, String summary,
        long length, String coverImgUrl, String ppfeature) {

    // 获取token认证字符串
    String auth = getAuthStr(ACCESS_KEY, SECRET_KEY);

    //中文字符处理
    name = encode(name);
    summary = encode(summary);

    String jsonTmpl = "{"
            + "\"ppfeature\": \"%s\","
            + "\"name\": \"%s\","
            + "\"summary\": \"%s\","
            + "\"coverimg\": \"%s\","
            + "\"length\": %s,"
            + "\"type\": 1"
            + "}";
    String body = String.format(jsonTmpl,  ppfeature,
            name, summary, coverImgUrl, length);

    Map<String, String> headers = new HashMap<String, String>();
    headers.put("Authorization", auth);
    headers.put("version", "3.0");

    //注：postJson方法发送POST请求时"Content-Type设置为application/json"
    String result = postJson(URL + "?getuptk=1", body, headers);
    return result;
}


//生成接口认证结果示例代码

private static final String DEFAULT_CHARSET = "UTF-8";
private static final String ALGORITHM = "HmacSHA1";

/**
 * 生成接口认证字符串
 */
public static String getAuthStr(String accessKey, String secretKey) {
    if (accessKey == null || accessKey.equals("") || secretKey == null || secretKey.equals("")) {
        throw new IllegalArgumentException("empty accessKey or secretKey");
    }

    // 1. 生成签名信息：{"rid":"random-string", "deadline":deadline-second}
    String rid = UUID.randomUUID().toString();
    long deadline = System.currentTimeMillis()/1000 + 3600;
    String info = String.format("{\"rid\":\"%s\", \"deadline\":%s}", rid, deadline);

    // 2. 对签名信息做URL安全的Base64编码
    String encodedJsonBase64;
    try {
        encodedJsonBase64 = new String(Base64.encodeBase64(info.getBytes(DEFAULT_CHARSET), false, true));
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(String.format("system not support encoding %s", DEFAULT_CHARSET));
    }

    // 3. 使用secret key 对签名信息加密
    byte[] sign;
    try {
        SecretKey sk = new SecretKeySpec(secretKey.getBytes(DEFAULT_CHARSET), ALGORITHM);
        Mac mac = Mac.getInstance(sk.getAlgorithm());
        mac.init(sk);
        sign = mac.doFinal(encodedJsonBase64.getBytes(DEFAULT_CHARSET));
    } catch (Exception e) {
        throw new RuntimeException("sha1 sign error");
    }

    // 4. 加密后的签名信息做URL安全的Base64编码
    String encoded_sign = new String(Base64.encodeBase64(sign, false, true));

    // 5. 生成最终认证字符串
    String accessToken = String.format("%s:%s:%s", accessKey, encoded_sign, encodedJsonBase64);

    return accessToken;
}

/**
 * 对中文UTF-8编码
 **/
private static String encode(String str) {
    try {
        return URLEncoder.encode(str, ENCODE);
    } catch (UnsupportedEncodingException e) {
        return str;
    }
}


/**
 * post方式提交json格式数据
 **/
public static String postJson(String url, String body, Map<String, String> headers) {
    PrintWriter out = null;
    BufferedReader in = null;
    String result = "";
    try {
        URL realUrl = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
        for(String key : headers.keySet()){
            conn.setRequestProperty(key, headers.get(key));
        }
        conn.setConnectTimeout(5 * 1000);
        conn.setReadTimeout(10 * 1000);
        conn.setDoOutput(true);
        conn.setDoInput(true);
        out = new PrintWriter(conn.getOutputStream());  //post 参数
        out.print(body);
        out.flush();
        in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = in.readLine()) != null) {
            result += line;
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (out != null)
                out.close();
            if (in != null)
                in.close();
        } catch (IOException ex) {//ignore
        }
    }
    return result;
}