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@glodon-ecs/web-sdk

v0.10.0

Published

The ECS js sdk for Web

Downloads

321

Readme

ECS-WEB-SDK

ECS 云底座前端相关仓库

  • node >= 16

开发及编译

# nvm use 16 # important!

npm i # 安装依赖

npm run dev # 启动开发模式,可在“页面控制台”中查看输出

npm run build # 打包sdk,更多配置参考 vite.config

DuckWasmEngine 类

DuckDB 封装类,用于 Web 环境交互,读取 ECS 数据。

方法

initialize: (config)=> engineInstance

初始化并返回 DuckWasmEngine 实例

| 参数 | 类型 | 是否必须 | 默认 | 描述 | | ---- | ------ | -------- | ------------ | ---------------------------------------------------------- | | env | String | - | production | 不同环境依赖包不同,可选 production 、test 、development |

query: (sql)=> Object{ data?, error? }

使用 SQL 查询并返回结果,成功返回 data,错误返回 error

| 参数 | 类型 | 是否必须 | 默认 | 描述 | | ---- | ------ | -------- | ---- | ---- | | sql | String | 是 | - | - |

prepareQuery: (sql, params)=> Object{ data?, error? }

使用 SQL 查询并返回结果,成功返回 data,错误返回 error

| 参数 | 类型 | 是否必须 | 默认 | 描述 | | ------ | ------ | -------- | ---- | -------- | | sql | String | 是 | - | - | | params | Arrary | 是 | [] | 查询参数 |

dispose: ()=> void

删除 DuckDB 实例

resetDBInstance: ()=> void

重置 DuckDB 实例

getDBInstance: ()=> db

返回 DuckDB 实例

示例

安装依赖

import { DuckWasmEngine } from "@glodon-ecs/web-sdk@latest";

const init = async () => {
  const initConfig = { env: 'production' };
  const duckdbEngine = await DuckWasmEngine.initialize(initConfig);
};
...

// 通过 SQL 查询数据
const { data, error } = await duckdbEngine.query( "select ident from FC_MESH" );

// prepareQuery
const params = [1];
const { data, error } = await duckdbEngine.prepareQuery( "select ident from FC_MESH where ident.id = ? " , params);

注意

由于 S3 对于 URL 上特殊符号签名的校验规则与华为不匹配,如等号(=)导致签名失败,因此文件修改@duckdb/duckdb-wasm/dist/duckdb-browser-eh.worker.js;去除对 params.url 的 uriEncode

export function createS3Headers(params: S3Params, payloadParams : S3PayloadParams | null = null) : Map<string, string> {
...
- let canonicalRequest = params.method + "\n" + uriEncode(params.url) + "\n" + params.query;
+ let canonicalRequest = params.method + "\n" + params.url + "\n" + params.query;
...
}
  • 混淆代码
38390 let o = t.method + "\n" + t.url + "\n" + t.query;

修改 query 参数的签名编码

export function getS3Params (config : S3Config | undefined, url: string, method : string) : S3Params {
...

+ path = path.split('?');

return {
-    url: path,
+    url: path[0],
-    query: "",
+    query: path[1] || "",
...
}

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