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澜舟认知智能平台

澜舟认知智能平台是以 NLP 为核心的行业知识服务云平台,提供知识图谱、机器翻译、辅助写作、情感分析、智能检索、智能客服、文档解析等一系列服务和能力,可高效地接入搜索、生成、翻译、对话等业务场景。

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记忆库翻译

记忆库翻译支持用户通过建立句子级别的术语对应关系来优化翻译结果,为用户提供个性化的机器翻译体验。

创建记忆库#

前往控制台开通 记忆库文本翻译 后,进入服务详情页创建记忆库,记忆库创建成功后可点击 详情 按钮进入记忆库编辑,点击 添加记忆 根据示例文件格式导入您自己的翻译语言对文件,目前仅支持中英文。

注意:创建记忆库成功后,库句ID 即为记忆库ID(memoryID),调用API时需传递此参数。

请求地址#

发送 POST 请求到:

https://open.langboat.com

通信协议#

澜舟科技机器翻译服务所提供的 API 接口均通过 HTTPS 进行通信,提供高安全性的通信通道。

调用量统计#

按调用成功的 源语言(sourceText) 字符数统计用量。

请求参数#

请求头#

请求头参数是否必须描述
Accept固定值 application/json
Authorization用于验证请求合法性的认证信息,值为 AccessKey:signature格式。
Content-Type固定值 application/json
Content-MD5HTTP 协议消息体的 128-bit MD5 散列值转换成 Base64 编码的结果。
Date请求时间,GMT 格式,如: Wed, 20 Apr. 2022 17:01:00 GMT。
x-langboat-signature-nonce唯一随机数,用于防止网络重放攻击。在不同请求中要使用不同的随机数值。
x-langboat-signature-method签名方法,目前只支持 HMAC-SHA256
签名计算方法
  1. 计算 body 的 MD5 值,然后转换为 Base64 编码,编码后的值设置到 Content-MD5 Header

计算示例:

  • body = {"sourceText": "Where there is a will, there is a way."}
  • MD5(body) = de56791f6534dcfb4937dd5bdb69ae6f (十六进制字符串表示,实际上为字节数组)
  • Base64(MD5(body)) = 3lZ5H2U03PtJN91b22mubw==

Content-MD5 Header: Content-MD5: 3lZ5H2U03PtJN91b22mubw==

  1. 使用请求中的 Header 参数构造待签名的 HeaderToSign:
StringToSign =
HTTP-Verb + "\n" + //HTTP-Verb只支持POST
Accept + “\n” + //Accept为application/json
Content-MD5 + "\n" + //第1步中计算出来的MD5值
Content-Type + "\n" + //Content-Type值为application/json
Date + "\n" + //Date值为GMT时间
x-langboat-signature-method + "\n" + // 只支持 HMAC-SHA256
x-langboat-signature-nonce + "\n";

StringToSign 示例:

POST
application/json
3lZ5H2U03PtJN91b22mubw==
application/json
Mon, 10 Oct 2022 07:11:08 GMT
HMAC-SHA256
42889
  1. 使用请求中的 Queries 构造待签名的 queryToSign。将query字符串(?后的所有参数)根据字典排序升序排列并以&分隔,示例如下:
action=translateText&domain=general&memoryID=1&sourceLanguage=zh&targetLanguage=en
  1. 将上两步构造的规范化字符串按照下面的规则构造成待签名的字符串。
stringToSign = headerStringToSign + queryToSign;
  1. 计算签名 signature。按照 RFC2104的定义,计算待签名字符串 stringToSign 的 HMAC 值,按照 Base64 编码规则把 HMAC 值编码成字符串,并在前面加上 AccessKey ,即得到签名值(Authorization),示例如下:
Signature = Base64(HMAC-SHA256( AccessSecret, UTF-8-Encoding-Of(stringToSign)))
Authorization = AccessKey + ":" + Signature

Signature 示例:LaglFdItD0M/XD/hx0n0bglt0xTlKPuYhRWn4++dHfs=

Authorization 示例: Authorization: 7Bo9ByyiTWRC1Y8KJJQ9cWtNpZLmrgyb:LaglFdItD0M/XD/hx0n0bglt0xTlKPuYhRWn4++dHfs=

Query 参数#

QUERY参数是否必须描述
action文本翻译固定参数:translateText
domain领域代码, 例如通用 general, 支持的代码见表1:支持的领域及其代码
sourceLanguage源语言代码,例如简体中文 zh,支持的代码见表2:支持的语种及其代码
targetLanguage目标语言代码,例如英语 en,支持的代码见表2:支持的语种及其代码
memoryID记忆库ID,指定您创建的记忆库ID,为空则不使用记忆库

Body 参数#

BODY 参数是否必须描述
sourceText待翻译的文本,长度限制:1 <= length <= 5000

表 1: 支持的领域及其代码#

领域代码含义可用语言项
general通用领域中英互译

表 2: 支持的语种及其代码#

语种代码英文中文语言自称
enEnglish英语English
zhChinese简体中文简体中文

请求示例#

请求示例:

POST https://open.langboat.com/?action=translateText
&domain=general
&memoryID=1
&sourceLanguage=en
&targetLanguage=zh
Content-Type: application/json
Content-MD5: 1B2M2Y8AsgTpgAmY7PhCfg==
Date: Tue, 19 Apr 2022 10:03:46 GMT
Accept: application/json
x-langboat-signature-method: HMAC-SHA256
x-langboat-signature-nonce: 43785
Authorization: <Your access_key>:LaglFdItD0M/XD/hx0n0bglt0xTlKPuYhRWn4++dHfs=
{"sourceText": "Where there is a will, there is a way."}

响应#

响应体#

成功的响应体是一个 JSON , 示例:

{
"code": 0,
"message": "success",
"data": { "translated": "有志者事竟成。" },
"requestId": "0a08fd0a-5828-4392-969a-1b25144539de"
}

响应状态码、业务编码#

下面是可能的 HTTP 响应状态码、业务(错误)编码:

HTTP 状态码业务编码描述
2000返回成功
40010400请求异常
40110401鉴权失败,核对AccessKey和AccessSecret 是否正确
40310403权限不足,查看是否开通服务;或QPS,字符数,次数超过限制
42210422参数错误,核对请求参数
50010500服务异常

错误响应示例

  • 不支持的 domain
{
"code": 10422,
"message": "参数错误,核对请求参数[ 不支持的domain : biology ]",
"requestId": "962132b206f8cedc77e41030b9aac2e6"
}

示例代码#

  • Java (JDK-11)
api-example
├── pom.xml
├── src
│   ├── main
│   │   └── java
│   │   └── com.langboat.saas.example
│   │   ├── Examples.java
│   │   └── LangboatOpenClient.java

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.langboat.saas.example</groupId>
<artifactId>api-example</artifactId>
<version>1.0.0</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>11</source>
<target>11</target>
</configuration>
</plugin>
</plugins>
</build>
<packaging>jar</packaging>
<name>api-example</name>
<properties>
<java.version>11</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.8.10</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.14.0</version>
</dependency>
</dependencies>
</project>

LangboatOpenClient.java

package com.langboat.saas.example;
import cn.hutool.core.util.URLUtil;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;
import java.text.SimpleDateFormat;
import java.util.*;
public class LangboatOpenClient {
private final String accessKey;
private final String accessSecret;
private final String url;
public LangboatOpenClient(String accessKey, String accessSecret) {
this.accessKey = accessKey;
this.accessSecret = accessSecret;
this.url = "https://open.langboat.com";
}
public LangboatOpenClient(String accessKey, String accessSecret, String url) {
this.accessKey = accessKey;
this.accessSecret = accessSecret;
this.url = url;
}
/*
* 计算 MD5 + Base64
*/
private String MD5Base64(String s) {
if (s == null)
return null;
String encodeStr = "";
byte[] utfBytes = s.getBytes();
MessageDigest mdTemp;
try {
mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(utfBytes);
byte[] md5Bytes = mdTemp.digest();
encodeStr = Base64.getEncoder().encodeToString(md5Bytes);
} catch (Exception e) {
throw new Error("Failed to generate MD5 : " + e.getMessage());
}
return encodeStr;
}
/*
* 计算 HMAC-SHA256 + Base64 编码
*/
private String HMACSha256Base64(String data, String key) {
String result;
try {
SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), "HmacSHA256");
Mac mac = Mac.getInstance("HmacSHA256");
mac.init(signingKey);
byte[] rawHmac = mac.doFinal(data.getBytes());
result = Base64.getEncoder().encodeToString(rawHmac);
} catch (Exception e) {
throw new Error("Failed to generate HMAC : " + e.getMessage());
}
return result;
}
/*
* 获取时间
*/
private String toGMTString(Date date) {
SimpleDateFormat df = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss z", Locale.CHINA);
df.setTimeZone(new java.util.SimpleTimeZone(0, "GMT"));
return df.format(date);
}
/**
* 调用服务
* @param queries: query 参数
* @param data: request body 数据
* @return
*/
public Object inference(Map<String, String> queries,Map<String, Object> data) {
PrintWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
try {
StringBuilder queriesStr = new StringBuilder();
queries.forEach((k, v) -> queriesStr.append("&").append(k).append("=").append(URLUtil.encode(v)));
queriesStr.setCharAt(0, '?');
URL openUrl = new URL(this.url +queriesStr);
String body = new ObjectMapper().writeValueAsString(data);
String method = "POST";
String accept = "application/json";
String contentType = "application/json";
String date = toGMTString(new Date());
// 1.对body做MD5+BASE64加密
String bodyMd5 = MD5Base64(body);
String nonce = "" + (int) (Math.random() * 65535);
String headerToSign = method + "\n" + accept + "\n" + bodyMd5 + "\n"
+ contentType + "\n" + date + "\n"
+ "HMAC-SHA256\n"
+ nonce + "\n";
// 2.计算 queryToSign
List<String> queriesList = new ArrayList<>();
queries.forEach((k, v) -> queriesList.add(k + "=" + v));
Collections.sort(queriesList);
String queryToSign = String.join("&", queriesList);
// 3.计算 stringToSign
String stringToSign = headerToSign + queryToSign;
// 4.计算 HMAC-SHA256 + Base64
String signature = HMACSha256Base64(stringToSign, this.accessSecret);
// 5.得到 authorization header 值
String authorization = this.accessKey + ":" + signature;
URLConnection conn = openUrl.openConnection();
conn.setRequestProperty("Accept", accept);
conn.setRequestProperty("Content-Type", contentType);
conn.setRequestProperty("Content-MD5", bodyMd5);
conn.setRequestProperty("Date", date);
conn.setRequestProperty("Authorization", authorization);
conn.setRequestProperty("x-langboat-signature-nonce", nonce);
conn.setRequestProperty("x-langboat-signature-method", "HMAC-SHA256");
// POST
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(body);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
InputStream is;
HttpURLConnection httpConn = (HttpURLConnection) conn;
if (httpConn.getResponseCode() == 200) {
is = httpConn.getInputStream();
} else {
is = httpConn.getErrorStream();
}
in = new BufferedReader(new InputStreamReader(is));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result.toString();
}
}

Examples.java

package com.langboat.saas.example;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.io.FileUtil;
import cn.hutool.json.JSONUtil;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.util.Base64;
import java.util.Map;
/**
* API 调用示例
*/
public class Examples {
private final LangboatOpenClient client = new LangboatOpenClient("yourAccessKey", "yourAccessSecret");
/***
* 记忆库翻译
* @param sourceLanguage 源语言代码
* @param targetLanguage 目标语言代码
* @param sourceText 待翻译文本
* @param memoryID 记忆库ID
* @return response body
*/
public Object memoryTranslate(String sourceLanguage, String targetLanguage, String sourceText, String memoryID) {
Map<String, String> queries = Map.of(
"action", "translateText",
"domain", "general",
"sourceLanguage", sourceLanguage,
"targetLanguage", targetLanguage,
"memoryID", memoryID
);
Map<String, Object> body = Map.of(
"sourceText", sourceText
);
return this.client.inference(queries, body);
}
public static void main(String[] args) throws IOException {
Examples examples = new Examples();
Object res = examples.memoryTranslate("zh", "en", "欢迎使用机器翻译", "40");
System.out.println(res);
}
}

Python (>=3.6)#

import base64
import datetime
import hashlib
import hmac
import json
import random
import requests
class LangboatOpenClient:
"""澜舟开放平台客户端"""
def __init__(self,
access_key: str,
access_secret: str,
url: str = "https://open.langboat.com"):
self.access_key = access_key
self.access_secret = access_secret
self.url = url
def _build_header(self, query: dict, data: dict) -> dict:
accept = "application/json"
# 1. body MD5 加密
content_md5 = base64.b64encode(
hashlib.md5(
json.dumps(data).encode("utf-8")
).digest()
).decode()
content_type = "application/json"
gmt_format = '%a, %d %b %Y %H:%M:%S GMT'
date = datetime.datetime.utcnow().strftime(gmt_format)
signature_method = "HMAC-SHA256"
signature_nonce = str(random.randint(0, 65535))
header_string = f"POST\n{accept}\n{content_md5}\n{content_type}\n" \
f"{date}\n{signature_method}\n{signature_nonce}\n"
# 2. 计算 queryToSign
queries_str = []
for k, v in sorted(query.items(), key=lambda item: item[0]):
if isinstance(v, list):
for i in v:
queries_str.append(f"{k}={i}")
else:
queries_str.append(f"{k}={v}")
queries_string = '&'.join(queries_str)
# 3.计算 stringToSign
sign_string = header_string + queries_string
# 4.计算 HMAC-SHA256 + Base64
secret_bytes = self.access_secret.encode("utf-8")
# 5.计算签名
signature = base64.b64encode(
hmac.new(secret_bytes, sign_string.encode("utf-8"), hashlib.sha256).digest()
).decode()
res = {
"Content-Type": content_type,
"Content-MD5": content_md5,
"Date": date,
"Accept": accept,
"X-Langboat-Signature-Method": signature_method,
"X-Langboat-Signature-Nonce": signature_nonce,
"Authorization": f"{self.access_key}:{signature}"
}
return res
def inference(self, queries: dict, data: dict) -> (int, dict):
"""
服务调用
:param queries: query 参数
:param data: request body 数据
:return: response status, response body to json
"""
headers = self._build_header(queries, data)
response = requests.post(url=self.url, headers=headers, params=queries, json=data)
return response.status_code, response.json()
if __name__ == '__main__':
_access_key = '<Your access_key>'
_access_secret = '<Your access_secret>'
client = LangboatOpenClient(
access_key=_access_key,
access_secret=_access_secret
)
# 通用中英记忆库翻译
_queries = {
"action": "translateText",
"domain": "general",
"sourceLanguage": "zh",
"targetLanguage": "en",
"memoryID": 1
}
_data = {"sourceText": "中国"}
status_code, result = client.inference(_queries, _data)
print("response status:", status_code)
print("response json:", json.dumps(result, ensure_ascii=False, indent=2))

Go (>=1.14)#

package main
import (
"crypto/hmac"
"crypto/md5"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"math/rand"
"net/http"
"net/url"
"sort"
"strings"
"time"
)
func main() {
client := OpenClient{
baseURL: "https://open.langboat.com",
accessKey: "Your_Access_Key",
accessSecret: "Your_Access_Secret",
}
// 通用中英翻译
queries := map[string]string{
"action": "translateText",
"domain": "general",
"sourceLanguage": "zh",
"targetLanguage": "en",
"memoryID": "1",
}
data := map[string]interface{}{
"sourceText": "中国",
}
resp := client.Inference(queries, data)
response, ok := resp.(*http.Response)
if !ok {
log.Fatal("fail to convert response")
}
body, err := ioutil.ReadAll(response.Body)
if err != nil {
log.Fatal("fail to read response body")
}
log.Println(string(body))
// 金融中英翻译
queries = map[string]string{
"action": "translateText",
"domain": "finance",
"sourceLanguage": "zh",
"targetLanguage": "en",
"memoryID": "1",
}
data = map[string]interface{}{
"sourceText": "大和证券认为,叮咚买菜庞大的用户群和较高的订单频次,为其提供了更有优势的算法预测基础和采购能力,可以提供更多样化的SKU和更好的服务。",
}
resp = client.Inference(queries, data)
response, ok = resp.(*http.Response)
if !ok {
log.Fatal("fail to convert response")
}
body, err = ioutil.ReadAll(response.Body)
if err != nil {
log.Fatal("fail to read response body")
}
log.Println(string(body))
}
type OpenClient struct {
baseURL string
accessKey string
accessSecret string
}
// Inference 调用服务。queries: query 参数;data: request body 数据
func (c *OpenClient) Inference(queries map[string]string, data map[string]interface{}) interface{} {
var queriesStr = ""
var first = true
for k, v := range queries {
if first {
queriesStr += "?" + k + "=" + url.QueryEscape(v)
first = false
} else {
queriesStr += "&" + k + "=" + url.QueryEscape(v)
}
}
dataJson, err := json.Marshal(data)
if err != nil {
log.Fatal(err.Error())
}
targetURL := c.baseURL + queriesStr
client := &http.Client{
Timeout: 15 * time.Second,
}
// 构造header
var (
payload = strings.NewReader(string(dataJson))
date = time.Now().UTC().Format(http.TimeFormat)
nonce = fmt.Sprint(10000 + rand.Intn(89999))
)
// 签名
signParam := SignParam{
Body: string(dataJson),
Query: queriesStr[1:],
DateGMT: date,
Nonce: nonce,
}
contentMD5, signature := GenSignature(signParam, c.accessSecret)
// 设置header
headers := map[string]string{
"Authorization": c.accessKey + ":" + signature,
"Content-Type": "application/json",
"Accept": "application/json",
"Date": date,
"Content-MD5": contentMD5,
"x-langboat-signature-method": "HMAC-SHA256",
"x-langboat-signature-nonce": nonce,
}
req, _ := http.NewRequest("POST", targetURL, payload)
for k, v := range headers {
req.Header.Add(k, v)
}
resp, err := client.Do(req)
if err != nil {
log.Println(err.Error())
}
return resp
}
// SignParam 生成签名需要的参数
type SignParam struct {
Body string // body数据
Query string // 原始query
DateGMT string // GTM时间
Nonce string // 随机数
}
func getMD5(str string) []byte {
h := md5.New()
h.Write([]byte(str))
return h.Sum(nil)
}
func hmacSha256(data string, secret string) []byte {
h := hmac.New(sha256.New, []byte(secret))
h.Write([]byte(data))
return h.Sum(nil)
}
func resortQuery(src string) string {
queries, _ := url.ParseQuery(src)
keys := make([]string, 0)
for k := range queries {
keys = append(keys, k)
}
sort.Strings(keys)
newQuery := url.Values{}
for _, k := range keys {
for _, value := range queries[k] {
newQuery.Add(k, value)
}
}
return newQuery.Encode()
}
// GenSignature 生成签名
func GenSignature(src SignParam, accessSecret string) (string, string) {
// 计算body的md5值
md5str := getMD5(src.Body)
// base64后得到contentMD5
contentMD5 := base64.StdEncoding.EncodeToString(md5str)
// query解析,并按照字典序重新排列
query := resortQuery(src.Query)
query, _ = url.QueryUnescape(query)
// 需要做签名的字符串结构
stringToSign := `POST
application/json
%s
application/json
%s
HMAC-SHA256
%s
%s`
stringToSign = fmt.Sprintf(stringToSign, contentMD5, src.DateGMT, src.Nonce, query)
hmac256 := hmacSha256(stringToSign, accessSecret)
signature := base64.StdEncoding.EncodeToString(hmac256)
return contentMD5, signature
}

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