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我想知道这段时期某些国家的人口1960-2015

我找到了这个包含这些数据的网站,我有兴趣使用Node.js.

我读到有一些API,但我不明白如何使用它们。

我去了这个网站(它允许你创建和下载XML格式的查询),我寻找了我感兴趣的表格。我设置了我感兴趣的参数并下载了查询:

<?xml version="1.0" encoding="utf-8"?>
<StructureSpecificDataQuery xmlns="http://www.sdmx.org/resources/sdmxml/schemas/v2_1/message">
  <!--NSI Web client v3.11.0.0-->
  <Header>
    <ID>IDREF47</ID>
    <Test>false</Test>
    <Prepared>2018-04-07T10:31:11.2310882+02:00</Prepared>
    <Sender id="Unknown" />
    <Receiver id="Unknown" />
  </Header>
  <Query>
    <ReturnDetails defaultLimit="361914" detail="Full" observationAction="Active" xmlns="http://www.sdmx.org/resources/sdmxml/schemas/v2_1/query">
      <Structure dimensionAtObservation="TIME_PERIOD" structureID="StructureId">
        <Structure xmlns="http://www.sdmx.org/resources/sdmxml/schemas/v2_1/common">
          <Ref agencyID="WB" id="WDI" version="1.0" xmlns="" />
        </Structure>
      </Structure>
    </ReturnDetails>
    <DataWhere xmlns="http://www.sdmx.org/resources/sdmxml/schemas/v2_1/query">
      <Dataflow>
        <Ref agencyID="WB" id="DF_UNDATA_WDI" version="1.0" xmlns="" />
      </Dataflow>
      <TimeDimensionValue>
        <TimeValue operator="greaterThanOrEqual">1960-01-01</TimeValue>
        <TimeValue operator="lessThanOrEqual">2015-12-31</TimeValue>
      </TimeDimensionValue>
      <Or>
        <DimensionValue>
          <ID>SERIES</ID>
          <Value operator="equal">SP_POP_TOTL</Value>
        </DimensionValue>
      </Or>
      <Or>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">ALB</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">AUT</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">BEL</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">BGR</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">HRV</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">CYP</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">DNK</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">EST</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">FIN</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">FRA</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">DEU</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">GRC</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">ISL</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">ITA</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">LVA</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">NLD</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">NOR</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">POL</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">PRT</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">ROM</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">SVK</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">SVN</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">ESP</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">SWE</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">CHE</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">GBR</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">EMU</Value>
        </DimensionValue>
        <DimensionValue>
          <ID>REF_AREA</ID>
          <Value operator="equal">EUU</Value>
        </DimensionValue>
      </Or>
    </DataWhere>
  </Query>
</StructureSpecificDataQuery>

现在我必须做一个 HTTP Post 请求。我安装request-promise 包

现在我不知道该怎么办。我考虑过使用这段代码,但我在哪里插入下载的查询?

var cheerio = require('cheerio');
var request = require('request-promise');
var methods = {};

var options = {
    uri: '???',
    transform: function(body) {
        return cheerio.load(body);
    }
};

methods.download = async function(req, res) {
    request(options)
    .then(function($) {
        // Process html like you would with jQuery...
    })
    .catch(function(err) {
        // Crawling failed or Cheerio choked...
    });
}

有人能帮我吗?

4

1 回答 1

0

提供的 SDMX API 陈旧且不易使用。就我个人而言,我会从表中选择所需的数据并以 csv 或 xml 格式下载。这比使用过时的 API 要容易得多。

于 2018-04-07T16:15:04.847 回答