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一、seatunnel-connectors-flink-http

1.总览

2.源码分析

这里是SeaTunnel项目http连接的数据源端模块，可以读入基于http协议封装的数据接口。pom.xml引用依赖如下：

Http类的getData()函数如下：

    public DataSet<Row> getData(FlinkEnvironment env) {
    	//从文件路径读请求参数
    	//文件路径格式, as a URI (e.g., "file:///some/local/file" or "hdfs://host:port/file/path")
        String syncValues = getSyncValues(env.getBatchEnvironment(), syncPath);
        LOG.info("sync values->{}", syncValues);
        //将json格式字符串的请求参数转换HashMap
        Map syncMap = jsonToMap(syncValues);
        if (!syncMap.isEmpty()) {
            requestMap.putAll(syncMap);
        }
        HttpClientResult response = new HttpClientResult();
        try {
            Map headerMap = jsonToMap(header);
            if (POST.equals(method)) {
                //发送Post请求
                response = HttpClientUtils.doPost(url, headerMap, requestMap);
            } else {
                //发送Get请求
                response = HttpClientUtils.doGet(url, headerMap, requestMap);
            }
        } catch (Exception e) {
            LOG.error("http call error!", e);
            throw new RuntimeException(e);
        }

        LOG.info("http respond code->{}", response.getCode());
        LOG.info("http respond body->{}", response.getContent());
		//返回数据集
        return env.getBatchTableEnvironment().toDataSet(
            env.getBatchTableEnvironment().fromValues(
                DataTypes.ROW(DataTypes.FIELD("rawMsg", DataTypes.STRING())),
                response.getContent()
            ),
            Row.class
        );
    }