知识库支持通过 API 接口进行操作，在使用 API 接口之前，需要先完成以下操作。

已通过 注册账号及开通服务 页面操作完成注册账号及开通服务。

在调用知识库的各个能力之前，确保您已生成访问密钥 Access Key。Access Key 包括 Access Key ID（简称为 AK） 和 Access Key Secret（简称为 SK），其中，Access Key ID 用于标识用户，Access Key Secret 用于验证用户的密钥，请您妥善保管。
AK/SK 密钥获取方式如下，更多详情请参考 Access Key（密钥）管理。

1. 单击右上角账号名下拉框中的【密钥管理】进入对应页面。
2. 单击【新建密钥】按钮，可获取 AK/SK，可以此为凭证调用上述已接入应用的接口。

获取到 AK/SK 后，根据实际使用的语言，利用下面所提供的示例代码通过SDK生成签名。（如需了解通过源码生成签名的详情请参考签名源码示例，如需了解通过 SDK 生成签名的详情请参考SDK概览）

Python 语言 SDK 生成签名

1. 安装火山引擎程序包。

   pip install volcengine

2. 生成签名。

   import json
   import sys
   import requests
   
   from volcengine.auth.SignerV4 import SignerV4
   from volcengine.base.Request import Request
   from volcengine.Credentials import Credentials
   
   def prepare_request(method, path, ak, sk, params=None, data=None, doseq=0):
       if params:
           for key in params:
               if (
                   type(params[key]) == int
                   or type(params[key]) == float
                   or type(params[key]) == bool
               ):
                   params[key] = str(params[key])
               # elif sys.version_info[0] != 3: # 在 Python 3.x 中，不需要这部分代码
               #     if type(params[key]) == unicode:
               #         params[key] = params[key].encode("utf-8")
               elif type(params[key]) == list:
                   if not doseq:
                       params[key] = ",".join(params[key])
       r = Request()
       r.set_shema("https")
       r.set_method(method)
       r.set_connection_timeout(10)
       r.set_socket_timeout(10)
       mheaders = {
           "Accept": "application/json",
           "Content-Type": "application/json",
       }
       r.set_headers(mheaders)
       if params:
           r.set_query(params)
       r.set_path(path)
       if data is not None:
           r.set_body(json.dumps(data))
       # 生成签名
       credentials = Credentials(ak, sk, "air", "cn-north-1")
       SignerV4.sign(r, credentials)
       return r
   

GO 语言 SDK 生成签名

1. 安装火山引擎程序包。

   go get -u github.com/volcengine/volc-sdk-golang

2. 生成签名。

   package main
   
   import (
           "bytes"
           "fmt"
           "net/http"
           "net/url"
           "strings"
           "io/ioutil"
           "github.com/volcengine/volc-sdk-golang/base"
   )
   
   const (
           testAk = "***"
           testSk = "***"
   )
   
   func PrepareRequest(method string, path string, ak string, sk string, query url.Values, body []byte) *http.Request {
           u := url.URL{
                   Scheme:   "https",
                   Host:     "api-knowledgebase.mlp.cn-beijing.volces.com",
                   Path:     "/api/knowledge/collection/search",
           }
           if query != nil {
                   u.RawQuery = query.Encode()
           }
           req, _ := http.NewRequest(strings.ToUpper(method), u.String(), bytes.NewReader(body))
           req.Header.Add("Accept", "application/json")
           req.Header.Add("Content-Type", "application/json")
           req.Header.Add("Host", "api-knowledgebase.mlp.cn-beijing.volces.com")
           credential := base.Credentials{
                   AccessKeyID:     ak,
                   SecretAccessKey: sk,
                   Service:         "air",
                   Region:          "cn-north-1",
           }
           req = credential.Sign(req)
           return req
   }
   

Java语言 SDK 生成签名

1. 安装火山引擎程序包。

   <dependency>
       <groupId>com.volcengine</groupId>
       <artifactId>volc-sdk-java</artifactId>
       <version>最新版本</version>
   </dependency> 
   

2. 生成签名

package javaTest;

import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import com.volcengine.auth.ISignerV4;
import com.volcengine.auth.impl.SignerV4Impl;
import com.volcengine.model.Credentials;
import com.volcengine.service.SignableRequest;

public class sign {
  public static SignableRequest prepareRequest(String host, String path, String method, List<NameValuePair> params, String body, String ak, String sk) throws Exception {
    SignableRequest request = new SignableRequest();
    request.setMethod(method);
    request.setHeader("Accept", "application/json");
    request.setHeader("Content-Type", "application/json");
    request.setHeader("Host", "api-knowledgebase.mlp.cn-beijing.volces.com");
    request.setEntity(new StringEntity(body, "utf-8"));

    URIBuilder builder = request.getUriBuilder();
    builder.setScheme("https");
    builder.setHost(host);
    builder.setPath(path);
    if (params != null) {
      builder.setParameters(params);
    }

    RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(5000).setConnectTimeout(2000).build();
    request.setConfig(requestConfig);

    Credentials credentials = new Credentials("cn-north-1", "air");
    credentials.setAccessKeyID(ak);
    credentials.setSecretAccessKey(sk);

    // 签名
    ISignerV4 ISigner = new SignerV4Impl();
    ISigner.sign(request, credentials);

    return request;
  }

Node.js语言 SDK 生成签名

1. 安装火山引擎程序包。

pnpm add @volcengine/openapi

2. 生成签名

import { Signer } from '@volcengine/openapi';
import type { RequestObj } from '@volcengine/openapi/lib/base/types';

interface Options {
  pathname: string
  method: 'GET' | 'POST'
  body?: string // json 字符串，当且仅当 post 请求
  region: 'cn-beijing' | 'cn-shanghai'
  params?: Record<string, any> // 当且仅当 get 请求
}

function signer({ pathname, method, body, region, params }: Options) {
  const requestObj: RequestObj = {
   region, 
   headers: {
     Accept: 'application/json',
     'Content-type': 'application/json'
   },
   method,
   body,
   pathname,
   params,
 }

  const signer = new Signer(requestObj, 'air')
    signer.addAuthorization({
      accessKeyId: 'ak', // 替换为用户 ak
      secretKey: 'sk', // 替换为用户 sk
  })
  return requestObj.headers
}

调用函数 signer 生成请求体 header 后，将生成好的 header 注入到用户请求函数中。

C#语言/PHP语言 通过源码 生成签名

C#和PHP语言目前未提供SDK生成签名的方式，可参考对应的源码来生成签名：
C#：https://github.com/volcengine/volc-openapi-demos/blob/main/signature/csharp/Program.cs
PHP：https://github.com/volcengine/volc-openapi-demos/blob/main/signature/php/sign.php

获取好AK/SK 密钥后，可以将签名生成函数和创建知识库逻辑写进同一个脚本文件中。这里给出将签名生成逻辑与具体接口调用对接的一般实践过程，以python代码为例：

import json
import requests
from volcengine.auth.SignerV4 import SignerV4
from volcengine.base.Request import Request
from volcengine.Credentials import Credentials

#签名生成逻辑
def prepare_request(method, path, params=None, data=None, doseq=0):
    #创建request
    if params:
        for key in params:
            if (
                    isinstance(params[key], int)
                    or isinstance(params[key], float)
                    or isinstance(params[key], bool)
            ):
                params[key] = str(params[key])
            elif isinstance(params[key], list):
                if not doseq:
                    params[key] = ",".join(params[key])
    r = Request()
    r.set_shema("http")
    r.set_method(method)
    r.set_connection_timeout(10)
    r.set_socket_timeout(10)
    mheaders = {
        "Accept": "application/json",
        "Content-Type": "application/json",
        "Host": g_knowledge_base_domain,
        "V-Account-Id": account_id,
    }
    r.set_headers(mheaders)
    if params:
        r.set_query(params)
    r.set_host(g_knowledge_base_domain)
    r.set_path(path)
    if data is not None:
        r.set_body(json.dumps(data))
    # 生成签名
    credentials = Credentials(ak, sk, "air", "cn-north-1")
    SignerV4.sign(r, credentials)
    return r

#创建知识库逻辑
def create():
    #创建知识库的请求方式
    method = "POST"
    #创建知识库的请求路径
    path = "/api/knowledge/collection/create"
    #创建知识库所需要的一些参数
    request_params = {
        "name": "lzm_test2",
        "data_type": "unstructured_data",
        "preprocessing": {
            "chunking_strategy":"custom_balance",
            "multi_modal":["image_ocr"]
        },
        "index": {
            "cpu_quota": 1,
            "embedding_model": "doubao-embedding-and-m3",
            "embedding_dimension": 2048,
            "quant": "int8",
            "index_type": "hnsw_hybrid"
        },
    }
    info_req = prepare_request(method=method, path=path, data=request_params)
    rsp = requests.request(
        method=info_req.method,
        url="https://{}{}".format(g_knowledge_base_domain, info_req.path),
        headers=info_req.headers,
        data=info_req.body
    )
    print(rsp.text)

if __name__ == "__main__":
    ak = '刚才申请到的ak'
    sk = '刚才申请到的sk'
    g_knowledge_base_domain = "api-knowledgebase.mlp.cn-beijing.volces.com"
    account_id = "你自己的火山账号id"
    #调用创建知识库的函数
    create()

其中：

1. main函数中的’ak/sk‘参数即为你刚才申请到的ak/sk
2. account_id填写你自己的火山账号id，在火山账号管理的页面能找到