文檔翻譯 API 簡介

說明

Hi，您好，歡迎使用有道智云文檔翻譯API接口服務。

本文檔主要針對需要集成HTTP API的技術開發工程師，詳細描述文檔翻譯能力相關的技術內容。

如果您有與我們商務合作的需求，可以通過以下方式聯系我們：

商務郵箱： AIcloud_Business@corp.youdao.com

如果您對文檔內容有任何疑問，可以通過以下幾種方式聯系我們：

客服QQ：1906538062

智云翻譯技術交流QQ 1群: 652880659

智云翻譯技術交流QQ 2群: 669384425

智云翻譯技術交流QQ 3群: 807539209

智云翻譯技術交流QQ 4群: 936752411

聯系郵箱： zhiyun@corp.youdao.com

溫馨提示：

• 本文檔主要針對開發人員，接入測試前需要獲取應用ID和應用密鑰；如果您還沒有，請按照新手指南 獲取。
• 平臺向每個賬戶贈送50元的體驗金，供用戶集成前測試所用，具體資費規則詳見 文檔翻譯服務報價 。

接口說明

文檔翻譯API接口提供有道的文檔翻譯服務。您只需要通過調用文檔翻譯API，傳入文檔的Base64編碼，指定源語言與目標語言，通過POST請求方式，就可以將文檔中的文字內容進行翻譯。

文檔翻譯 API HTTPS地址：

• 文檔上傳接口

https://openapi.youdao.com/file_trans/upload

• 進度查詢接口

https://openapi.youdao.com/file_trans/query

• 文檔下載接口

https://openapi.youdao.com/file_trans/download

協議須知

調用方在集成文本翻譯API時，請遵循以下規則。

接口調用參數

調用API需要向接口發送以下字段來訪問服務。

• 文檔上傳接口

• 進度查詢接口

• 文檔下載接口

簽名生成方法如下：

sha256(應用ID + input + salt + curtime + 應用密鑰)

其中，input的計算方式為：

• 文檔上傳接口

input = Base64（q）字符串（當Base64（q）長度小于等于20） 或 input = Base64（q）前10個字符前10個字符 + Base64（q）長度 + Base64（q）后十個字符（當Base64（q）長度大于20）

• 其它接口

input = flownumber字符串（當flownumber長度小于等于20）。 或 input = flownumber前10個字符前10個字符 + flownumber長度 + flownumber后十個字符（當flownumber長度大于20）

不同語言獲取時間戳，請參看 此鏈接

如果對簽名有疑問，可以參看文檔末尾各語言demo。

輸出結果

返回的結果是json格式，具體說明如下：

• 文檔上傳

• 進度查詢接口

• 文檔下載接口 若Content-Type為application/json，表示下載失敗，返回值為json，否則返回值為文件流。

示例

• 文檔上傳接口

返回結果：

{
    "errorCode": "0",   //錯誤碼
    "flownumber": "C9193F8204484E51B7DDA604137AEE3D"   //文檔流水號
}

• 進度查詢接口

返回結果：

{
    "errorCode": "0",   //錯誤碼
    "status": 1,   //狀態碼
    "statusString": "上傳中'   //狀態描述
}

• 文檔下載接口

失敗時返回結果：

{
    "errorCode": "0"   //錯誤碼
}

支持的語言表

下表為各語言對應代碼：

文檔狀態碼

服務配置

錯誤代碼列表

常用語言 Demo

Java 示例

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.*;

public class Demo {

    private static Logger logger = LoggerFactory.getLogger(Demo.class);

    private static final String YOUDAO_URL_UPLOAD = "https://openapi.youdao.com/file_trans/upload";

    private static final String YOUDAO_URL_QUERY = "https://openapi.youdao.com/file_trans/query";

    private static final String YOUDAO_URL_DOWNLOAD = "https://openapi.youdao.com/file_trans/download";

    private static final String APP_KEY = "您的應用ID";

    private static final String APP_SECRET = "您的應用密鑰";

    public static void main(String[] args) throws IOException {
        upload();
        query();
        download();
    }
    
    public static void upload() throws IOException {
        Map<String,String> params = new HashMap<String,String>();
        String q = loadAsBase64("文件的路徑");
        String salt = String.valueOf(System.currentTimeMillis());
        String curtime = String.valueOf(System.currentTimeMillis() / 1000);
        String signStr = APP_KEY + truncate(q) + salt + curtime + APP_SECRET;
        String sign = getDigest(signStr);
        params.put("q", q);
        params.put("fileName", "文件名稱");
        params.put("fileType", "文件類型");
        params.put("langFrom", "源語言");
        params.put("langTo", "目標語言");
        params.put("appKey", APP_KEY);
        params.put("salt", salt);
        params.put("curtime", curtime);
        params.put("sign", sign);
        params.put("docType", "json");
        params.put("signType", "v3");
        String result = requestForHttp(YOUDAO_URL_UPLOAD, params);
        /** 處理結果 */
        System.out.println(result);
    }
    
    public static void query() throws IOException {
        Map<String,String> params = new HashMap<String,String>();
        String flownumber = "文件流水號";
        String salt = String.valueOf(System.currentTimeMillis());
        String curtime = String.valueOf(System.currentTimeMillis() / 1000);
        String signStr = APP_KEY + truncate(flownumber) + salt + curtime + APP_SECRET;
        String sign = getDigest(signStr);
        params.put("flownumber", flownumber);
        params.put("appKey", APP_KEY);
        params.put("salt", salt);
        params.put("curtime", curtime);
        params.put("sign", sign);
        params.put("docType", "json");
        params.put("signType", "v3");
        String result = requestForHttp(YOUDAO_URL_QUERY, params);
        /** 處理結果 */
        System.out.println(result);
    }
    
    public static void download() throws IOException {
        Map<String,String> params = new HashMap<String,String>();
        String flownumber = "文件流水號";
        String salt = String.valueOf(System.currentTimeMillis());
        String curtime = String.valueOf(System.currentTimeMillis() / 1000);
        String signStr = APP_KEY + truncate(flownumber) + salt + curtime + APP_SECRET;
        String sign = getDigest(signStr);
        params.put("flownumber", flownumber);
        params.put("downloadFileType", "文件下載類型");
        params.put("appKey", APP_KEY);
        params.put("salt", salt);
        params.put("curtime", curtime);
        params.put("sign", sign);
        params.put("docType", "json");
        params.put("signType", "v3");
        String result = requestForHttp(YOUDAO_URL_DOWNLOAD, params);
        /** 處理結果 */
        System.out.println(result);
    }

    public static String requestForHttp(String url,Map<String,String> params) throws IOException {
        String result = "";

        /** 創建HttpClient */
        CloseableHttpClient httpClient = HttpClients.createDefault();

        /** httpPost */
        HttpPost httpPost = new HttpPost(url);
        List<NameValuePair> paramsList = new ArrayList<NameValuePair>();
        Iterator<Map.Entry<String,String>> it = params.entrySet().iterator();
        while(it.hasNext()){
            Map.Entry<String,String> en = it.next();
            String key = en.getKey();
            String value = en.getValue();
            paramsList.add(new BasicNameValuePair(key,value));
        }
        httpPost.setEntity(new UrlEncodedFormEntity(paramsList,"UTF-8"));
        CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
        try{
            HttpEntity httpEntity = httpResponse.getEntity();
            result = EntityUtils.toString(httpEntity,"UTF-8");
            EntityUtils.consume(httpEntity);
        }finally {
            try{
                if(httpResponse!=null){
                    httpResponse.close();
                }
            }catch(IOException e){
                logger.info("## release resouce error ##" + e);
            }
        }
        return result;
    }

    /**
     * 生成加密字段
     */
    public static String getDigest(String string) {
        if (string == null) {
            return null;
        }
        char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
        byte[] btInput = string.getBytes(StandardCharsets.UTF_8);
        try {
            MessageDigest mdInst = MessageDigest.getInstance("SHA-256");
            mdInst.update(btInput);
            byte[] md = mdInst.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (byte byte0 : md) {
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (NoSuchAlgorithmException e) {
            return null;
        }
    }

    public static String loadAsBase64(String imgFile)
  {//將文件轉化為字節數組字符串，并對其進行Base64編碼處理

    File file = new File(imgFile);
    if(!file.exists()){
        logger.error("文件不存在");
        return null;
    }
    InputStream in = null;
    byte[] data = null;
      //讀取文件字節數組
    try
    {
        in = new FileInputStream(imgFile);
        data = new byte[in.available()];
        in.read(data);
        in.close();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
      //對字節數組Base64編碼
    return Base64.getEncoder().encodeToString(data);//返回Base64編碼過的字節數組字符串
  }

  public static String truncate(String q) {
        if (q == null) {
            return null;
        }
        int len = q.length();
        String result;
        return len <= 20 ? q : (q.substring(0, 10) + len + q.substring(len - 10, len));
    }
}

Python 示例

# -*- coding: utf-8 -*-
import sys
import uuid
import requests
import base64
import hashlib
import time

reload(sys)
sys.setdefaultencoding('utf-8')

YOUDAO_URL_UPLOAD = 'https://openapi.youdao.com/file_trans/upload'
YOUDAO_URL_QUERY = 'https://openapi.youdao.com/file_trans/query'
YOUDAO_URL_DOWNLOAD = 'https://openapi.youdao.com/file_trans/download'
APP_KEY = '您的應用ID'
APP_SECRET = '您的應用密鑰'


def truncate(q):
    if q is None:
        return None
    q_utf8 = q.decode("utf-8")
    size = len(q_utf8)
    return q_utf8 if size <= 20 else q_utf8[0:10] + str(size) + q_utf8[size - 10:size]


def encrypt(signStr):
    hash_algorithm = hashlib.sha256()
    hash_algorithm.update(signStr.encode('utf-8'))
    return hash_algorithm.hexdigest()


def do_request(url, data):
    headers = {'Content-Type': 'application/x-www-form-urlencoded'}
    return requests.post(url, data=data, headers=headers)


def upload():
    f = open(r'文件的路徑', 'rb')  # 二進制方式打開文件
    q = base64.b64encode(f.read())  # 讀取文件內容，轉換為base64編碼
    f.close()
    salt = str(uuid.uuid1())
    curtime = str(int(time.time()))
    signStr = APP_KEY + truncate(q) + salt + curtime + APP_SECRET
    sign = encrypt(signStr)

    data = {}
    data['q'] = q
    data['fileName'] = '文件名稱'
    data['fileType'] = '文件類型'
    data['langFrom'] = '源語言'
    data['langTo'] = '目標語言'
    data['appKey'] = APP_KEY
    data['salt'] = salt
    data['curtime'] = curtime
    data['sign'] = sign
    data['docType'] = 'json'
    data['signType'] = 'v3'

    response = do_request(YOUDAO_URL_UPLOAD, data)
    print response.content


def query():
    flownumber = '文件流水號'
    salt = str(uuid.uuid1())
    curtime = str(int(time.time()))
    signStr = APP_KEY + truncate(flownumber) + salt + curtime + APP_SECRET
    sign = encrypt(signStr)

    data = {}
    data['flownumber'] = flownumber
    data['appKey'] = APP_KEY
    data['salt'] = salt
    data['curtime'] = curtime
    data['sign'] = sign
    data['docType'] = 'json'
    data['signType'] = 'v3'

    response = do_request(YOUDAO_URL_QUERY, data)
    print response.content


def download():
    flownumber = '文件流水號'
    salt = str(uuid.uuid1())
    curtime = str(int(time.time()))
    signStr = APP_KEY + truncate(flownumber) + salt + curtime + APP_SECRET
    sign = encrypt(signStr)

    data = {}
    data['flownumber'] = flownumber
    data['downloadFileType'] = '文件下載類型'
    data['appKey'] = APP_KEY
    data['salt'] = salt
    data['curtime'] = curtime
    data['sign'] = sign
    data['docType'] = 'json'
    data['signType'] = 'v3'

    response = do_request(YOUDAO_URL_DOWNLOAD, data)
    print response.content


if __name__ == '__main__':
    upload()
    query()
    download()

C# 示例

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Collections.Generic;
using System.Security.Cryptography;

namespace zhiyun_csharp_demo
{
    class Demo
    {
        public static void Main()
        {
            Upload();
            Query();
            Download();
        }
        
        protected static void Upload() {
            Dictionary dic = new Dictionary();
            string appKey = "您的應用ID";
            string appSecret = "您的應用密鑰";
            string url = "https://openapi.youdao.com/file_trans/upload";
            string q = LoadAsBase64("文件的路徑");
            string salt = DateTime.Now.Millisecond.ToString();
            TimeSpan ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc));
            long millis = (long) ts.TotalMilliseconds;
            string curtime = Convert.ToString(millis / 1000);
            string signStr = appKey + Truncate(q) + salt + curtime + appSecret;;
            string sign = ComputeHash(signStr, new SHA256CryptoServiceProvider());
            dic.Add("q", System.Web.HttpUtility.UrlEncode(q));
            dic.Add("fileName", "文件名稱");
            dic.Add("fileType", "文件類型");
            dic.Add("langFrom", "源語言");
            dic.Add("langTo", "目標語言");
            dic.Add("appKey", appKey);
            dic.Add("salt", salt);
            dic.Add("curtime", curtime);
            dic.Add("sign", sign);
            dic.Add("docType", "json");
            dic.Add("signType", "v3");
            string result = Post(url, dic);
            Console.WriteLine(result);
        }
        
        protected static void Query() {
            Dictionary dic = new Dictionary();
            string appKey = "您的應用ID";
            string appSecret = "您的應用密鑰";
            string url = "https://openapi.youdao.com/file_trans/query";
            string flownumber = "文件流水號";
            string salt = DateTime.Now.Millisecond.ToString();
            TimeSpan ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc));
            long millis = (long) ts.TotalMilliseconds;
            string curtime = Convert.ToString(millis / 1000);
            string signStr = appKey + Truncate(flownumber) + salt + curtime + appSecret;;
            string sign = ComputeHash(signStr, new SHA256CryptoServiceProvider());
            dic.Add("flownumber", flownumber);
            dic.Add("appKey", appKey);
            dic.Add("salt", salt);
            dic.Add("curtime", curtime);
            dic.Add("sign", sign);
            dic.Add("docType", "json");
            dic.Add("signType", "v3");
            string result = Post(url, dic);
            Console.WriteLine(result);
        }
        
        protected static void Download() {
            Dictionary dic = new Dictionary();
            string appKey = "您的應用ID";
            string appSecret = "您的應用密鑰";
            string url = "https://openapi.youdao.com/file_trans/download";
            string flownumber = "文件流水號";
            string salt = DateTime.Now.Millisecond.ToString();
            TimeSpan ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc));
            long millis = (long) ts.TotalMilliseconds;
            string curtime = Convert.ToString(millis / 1000);
            string signStr = appKey + Truncate(flownumber) + salt + curtime + appSecret;;
            string sign = ComputeHash(signStr, new SHA256CryptoServiceProvider());
            dic.Add("flownumber", flownumber);
            dic.Add("downloadFileType", "文件下載類型");
            dic.Add("appKey", appKey);
            dic.Add("salt", salt);
            dic.Add("curtime", curtime);
            dic.Add("sign", sign);
            dic.Add("docType", "json");
            dic.Add("signType", "v3");
            string result = Post(url, dic);
            Console.WriteLine(result);
        }

        protected static string ComputeHash(string input, HashAlgorithm algorithm)
        {
          Byte[] inputBytes = Encoding.UTF8.GetBytes(input);
          Byte[] hashedBytes = algorithm.ComputeHash(inputBytes);
          return BitConverter.ToString(hashedBytes).Replace("-", "");
        }

        protected static string Truncate(string q)
        {
            if (q == null)
            {
               return null;
            }
            int len = q.Length;
            return len <= 20 ? q : (q.Substring(0, 10) + len + q.Substring(len - 10, 10));
        }

        protected static string LoadAsBase64(string filename)
        {
            try
            {
                FileStream filestream = new FileStream(filename, FileMode.Open);
                byte[] arr = new byte[filestream.Length];
                filestream.Position = 0;
                filestream.Read(arr, 0, (int)filestream.Length);
                filestream.Close();
                return Convert.ToBase64String(arr);
            }
            catch (Exception ex)
            {
                return null;
            }
        }

        protected static string Post(string url, Dictionary dic)
        {
            string result = "";
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            StringBuilder builder = new StringBuilder();
            int i = 0;
            foreach (var item in dic)
            {
                if (i > 0)
                    builder.Append("&");
                builder.AppendFormat("{0}={1}", item.Key, item.Value);
                i++;
            }
            byte[] data = Encoding.UTF8.GetBytes(builder.ToString());
            req.ContentLength = data.Length;
            using (Stream reqStream = req.GetRequestStream())
            {
                reqStream.Write(data, 0, data.Length);
                reqStream.Close();
            }
            HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
            Stream stream = resp.GetResponseStream();
            using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
            {
                result = reader.ReadToEnd();
            }
            return result;
        }
    }
}

PHP 示例

<?php
define("CURL_TIMEOUT",   2000);
define("URL_UPLOAD",     "https://openapi.youdao.com/file_trans/upload");
define("URL_QUERY",      "https://openapi.youdao.com/file_trans/query");
define("URL_DOWNLOAD",   "https://openapi.youdao.com/file_trans/download");
define("APP_KEY",        "您的應用ID"); // 替換為您的應用ID
define("SEC_KEY",        "您的應用密鑰"); // 替換為您的密鑰

function upload()
{
     $file = "文件的路徑";
     $fp = fopen($file, "r") or die("Can't open file");
     // base64編碼
     $q = base64_encode(fread($fp, filesize($file)));
     fclose($fp);
     $salt = create_guid();
     $curtime = strtotime("now");
     $signStr = APP_KEY . truncate($q) . $salt . $curtime . SEC_KEY;
     $args = array(
        'appKey' => APP_KEY,
        'salt' => $salt,
     );
     $args['q'] = $q;
     $args['fileName'] = '文件名稱';
     $args['fileType'] = '文件類型';
     $args['langFrom'] = '源語言';
     $args['langTo'] = '目標語言';
     $args['curtime'] = $curtime;
     $args['sign'] = hash("sha256", $signStr);
     $args['docType'] = 'json';
     $args['signType'] = 'v3';
     $ret = call(URL_UPLOAD, $args);
     print_r($ret);
     $ret = json_decode($ret, true);
     return $ret;
}

function query()
{
     $flownumber = "文件流水號";
     $salt = create_guid();
     $curtime = strtotime("now");
     $signStr = APP_KEY . truncate($flownumber) . $salt . $curtime . SEC_KEY;
     $args = array(
        'appKey' => APP_KEY,
        'salt' => $salt,
     );
     $args['flownumber'] = $flownumber;
     $args['curtime'] = $curtime;
     $args['sign'] = hash("sha256", $signStr);
     $args['docType'] = 'json';
     $args['signType'] = 'v3';
     $ret = call(URL_QUERY, $args);
     print_r($ret);
     $ret = json_decode($ret, true);
     return $ret;
}

function download()
{
     $flownumber = "文件流水號";
     $salt = create_guid();
     $curtime = strtotime("now");
     $signStr = APP_KEY . truncate($flownumber) . $salt . $curtime . SEC_KEY;
     $args = array(
        'appKey' => APP_KEY,
        'salt' => $salt,
     );
     $args['flownumber'] = $flownumber;
     $args['downloadFileType'] = '文件下載類型';
     $args['curtime'] = $curtime;
     $args['sign'] = hash("sha256", $signStr);
     $args['docType'] = 'json';
     $args['signType'] = 'v3';
     $ret = call(URL_DOWNLOAD, $args);
     print_r($ret);
     $ret = json_decode($ret, true);
     return $ret;
}

// 發起網絡請求
function call($url, $args=null, $method="post", $testflag = 0, $timeout = CURL_TIMEOUT, $headers=array())
{
    $ret = false;
    $i = 0;
    while($ret === false)
    {
        if($i > 1)
            break;
        if($i > 0)
        {
            sleep(1);
        }
         $ret = callOnce($url, $args, $method, false, $timeout, $headers);
         $i++;
    }
    return $ret;
}

function callOnce($url, $args=null, $method="post", $withCookie = false, $timeout = CURL_TIMEOUT, $headers=array())
{
    $ch = curl_init();
    if($method == "post")
    {
        $data = convert($args);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_POST, 1);
    }
    else
    {
        $data = convert($args);
        if($data)
        {
            if(stripos($url, "?") > 0)
            {
                 $url .= "&$data";
            }
            else
            {
                 $url .= "?$data";
            }
        }
    }
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    if(!empty($headers))
    {
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    }
    if($withCookie)
    {
        curl_setopt($ch, CURLOPT_COOKIEJAR, $_COOKIE);
    }
    $r = curl_exec($ch);
    curl_close($ch);
    return $r;
}

function convert(&$args)
{
    $data = '';
    if (is_array($args))
    {
        foreach ($args as $key=>$val)
        {
            if (is_array($val))
            {
                foreach ($val as $k=>$v)
                {
                     $data .= $key.'['.$k.']='.rawurlencode($v).'&';
                }
            }
            else
            {
                     $data .="$key=".rawurlencode($val)."&";
            }
        }
        return trim($data, "&");
    }
    return $args;
}

// uuid generator
function create_guid(){
    $microTime = microtime();
    list($a_dec, $a_sec) = explode(" ", $microTime);
    $dec_hex = dechex($a_dec* 1000000);
    $sec_hex = dechex($a_sec);
    ensure_length($dec_hex, 5);
    ensure_length($sec_hex, 6);
    $guid = "";
    $guid .= $dec_hex;
    $guid .= create_guid_section(3);
    $guid .= '-';
    $guid .= create_guid_section(4);
    $guid .= '-';
    $guid .= create_guid_section(4);
    $guid .= '-';
    $guid .= create_guid_section(4);
    $guid .= '-';
    $guid .= $sec_hex;
    $guid .= create_guid_section(6);
    return $guid;
}

function truncate($q) {
    $len = abslength($q);
    return $len <= 20 ? $q : (mb_substr($q, 0, 10) . $len . mb_substr($q, $len - 10, $len));
}

function abslength($str)
{
    if(empty($str)){
        return 0;
    }
    if(function_exists('mb_strlen')){
        return mb_strlen($str,'utf-8');
    }
    else {
        preg_match_all("/./u", $str, $ar);
        return count($ar[0]);
    }
}

function ensure_length(&$string, $length){
    $strlen = strlen($string);
    if($strlen < $length)
    {
         $string = str_pad($string, $length, "0");
    }
    else if($strlen > $length)
    {
         $string = substr($string, 0, $length);
    }
}

function create_guid_section($characters){
    $return = "";
    for($i = 0; $i < $characters; $i++)
    {
         $return .= dechex(mt_rand(0,15));
    }
    return $return;
}
// 輸入
upload();
query();
download();
?>