0

使用 xml2js nodejs 模块，我设法使用以下代码从（大！）xml文档中提取；

var fs = require('fs'),
    parseString = require('xml2js').parseString,
    request = require('request');
    request('https://fb.motorcyclenews.com/mcn-bfs-fb-marketplace.xml', function (error, response, body) {
       if (!error && response.statusCode == 200) {
          parseString(body, function (err, result) {
            console.log(JSON.stringify(result));
          });
     }});

这个“有效”，结果的一小部分摘录如下；

"dealer_id":["--"],"dealer_name":["-- 摩托车"],"vehicle_registration_plate":["--"],"fb_page_id":["--"],"dealer_communication_channel":[ "LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url":["https://www.motorcyclenews.com/privacy-policy/"],"mileage":[{"value" :["552"],"unit":["MI"]}],"address":[{"$":{"format":"simple"},"component":[{" ":"Ivy路车库","$":{"name":"addr1"}},{" ":"Ivy Road","$":{"name":"city"}},{" ":"Lancashire" "$":{"name":"region"}},{" ":"UK","$":{"name":"country"}},{"":"-- 6DJ","$":{"name":"postal_code"}}]}],"vehicle_type":["MOTORCYCLE"],"dealer_url":["https://www.motorcyclenews. com/api/bfs-dealer/redirect/--"]},{"vehicle_id":["56968134"],"make":["HONDA"],"model":["NSS300 FORZA"],"year ":["2018"],"transmission":["OTHER"],"body_style":["OTHER"],"fuel_type":["GASOLINE"],"drivetrain":["RWD"],"description ":["HONDA FORZA 300CC ULTRA LOW MILES, TOP BOX FITTED, Hand Guards, Heated Grips, 完好无损, 为什么要上火车或公共汽车节省时间和金钱, 可在全国范围内提供低成本金融服务。"],"image": [{"url":["https://cdn.images.autoexposure.co.uk/AETA86362/AETV24605587_5.jpg?t=--"]}],"url":["https://www.motorcyclenews.com/bikes-for-sale/honda/nss300-forza /--/"],"title":["HONDA NSS300 FORZA (2018)"],"price":["3,750.00 GBP"],"state_of_vehicle":["USED"],"exterior_color":["BLACK "],"latitude":["51.7241967327"],"longitude":["0.4833483158"],"dealer_id":["-- City Motorcycles LTD"],"dealer_name":["-- City Motorcycles LTD"] ,"vehicle_registration_plate":["--"],"fb_page_id":["--"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url": [“https://www.motorcyclenews.com/privacy-policy/"],"mileage":[{"value":["1793"],"unit":["MI"]}],"address":[{"$":{ "格式":"简单"},"组件":[{"":"198-200 Baddow Road","$":{"name":"addr1"}},{" ":"Unknown","$":{"name":"city"}},{" ":"埃塞克斯","$":{"name":"region"}},{" ":"UK","$":{"name":"country"}},{" ":"CM2 9QP","$":{"name":"postal_code"}}]}],"vehicle_type":["MOTORCYCLE"],"dealer_url":["https://www.motorcyclenews.com/api/bfs -dealer/redirect/--"]},{"vehicle_id":["56970343"],"make":["HONDA"],"model":["VISION 110"],"year":["2011 "],"传输":["OTHER"],"body_style":["OTHER"],"fuel_type":["GASOLINE"],"drivetrain":["RWD"],"description":[""],"url":["https://www. motornews.com/bikes-for-sale/honda/vision-110/--

/"],"标题":["本田

VISION 110 (2011)"],"price":["1,250.00 GBP"],"state_of_vehicle":["USED"],"exterior_color":["Red"],"latitude":["52.2398688251"]," longitude":["0.752311123"],"dealer_id":["John Banks Honda Motorcycles"],"dealer_name":["John -- Honda Motorcycles"],"vehicle_registration_plate":["--"],"fb_page_id" :["7714743854"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url":["https://www.motorcyclenews.com/privacy-policy/ "],"里程":[{"价值":["5051"],"单位":["MI"]}],"地址":[{"$":{"格式":"simple"},"component":[{" ":"Kempson Way","$":{"name":"addr1"}},{" ":"Moreton Way","$":{" name":"city"}},{" ":"Suffolk","$":{"name":"region"}},{" ":"UK","$":{"name":"国家”}}，{”名称":"国家"}},{"名称":"国家"}},{"":"-- 7AR","$":{"name":"postal_code"}}]}],"vehicle_type":["MOTORCYCLE"],"dealer_url":["https://www.motorcyclenews. com/api/bfs-dealer/redirect/--"]},{"vehicle_id":["--"],"make":["HONDA"],"model":["CRF250"],"year ":["2019"],"transmission":["OTHER"],"body_style":["OTHER"],"fuel_type":["GASOLINE"],"drivetrain":["RWD"],"description ":[""],"url":["https://www.motorcyclenews.com/bikes-for-sale/honda/crf250/--/"],"title":["HONDA CRF250 (2019) "],"price":["4,500.00 GBP"],"state_of_vehicle":["USED"],"exterior_color":["Red"],"latitude":["52.2398688251"],"longitude":["0.752311123"],"dealer_id":["John Banks Honda Motorcycles"],"dealer_name":["John - - 本田摩托车"],"vehicle_registration_plate":["--"],"fb_page_id":["7714743854"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"], “dealer_privacy_policy_url”：[“https://www.motorcyclenews.com/privacy-policy/”]，“里程”：[{“价值”：[“1000”]，“单位”：[“MI”]}] ,"地址":[{"$":{"格式":"简单"},"组件":[{"longitude":["0.752311123"],"dealer_id":["John Banks Honda Motorcycles"],"dealer_name":["John -- Honda Motorcycles"],"vehicle_registration_plate":["--"],"fb_page_id" :["7714743854"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url":["https://www.motorcyclenews.com/privacy-policy/ "],"里程":[{"价值":["1000"],"单位":["MI"]}],"地址":[{"$":{"格式":"简单"} ，“零件”：[{”longitude":["0.752311123"],"dealer_id":["John Banks Honda Motorcycles"],"dealer_name":["John -- Honda Motorcycles"],"vehicle_registration_plate":["--"],"fb_page_id" :["7714743854"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url":["https://www.motorcyclenews.com/privacy-policy/ "],"里程":[{"价值":["1000"],"单位":["MI"]}],"地址":[{"$":{"格式":"简单"} ，“零件”：[{”vehicle_registration_plate":["--"],"fb_page_id":["7714743854"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url":["https ://www.motorcyclenews.com/privacy-policy/"],"里程":[{"value":["1000"],"unit":["MI"]}],"address":[{ "$":{"格式":"简单"},"组件":[{"vehicle_registration_plate":["--"],"fb_page_id":["7714743854"],"dealer_communication_channel":["LEAD_FORM"],"dealer_phone":["+44 --"],"dealer_privacy_policy_url":["https ://www.motorcyclenews.com/privacy-policy/"],"里程":[{"value":["1000"],"unit":["MI"]}],"address":[{ "$":{"格式":"简单"},"组件":[{"["1000"],"unit":["MI"]}],"address":[{"$":{"format":"simple"},"component":[{"["1000"],"unit":["MI"]}],"address":[{"$":{"format":"simple"},"component":[{"":"Kempson Way","$":{"name":"addr1"}},{" ":"Moreton Way","$":{"name":"city"}},{" ": "萨福克","$":{"name":"region"}},{" ":"UK","$":{"name":"country"}},{" ":"-- 7AR ","$":{"name":"postal_code"}}]}],"vehicle_type":["MOTORCYCLE"],"dealer_url":["https://www.motorcyclenews.com/api/bfs-经销商/重定向/--"]}]}}

但我现在想做的是从中提取一些信息。

特别是，我想知道列表中出现了多少次，例如“vehicle_id”的条目。

然后我可以将它用于我测试的其他部分。

任何帮助将不胜感激。

谢谢

4

1 回答 1

0

假设您发布的输出是一个对象，试试这个

let finalResult = Object.keys(result).reduce( (allNames, name) => { 
  if (name in allNames && name === "vehicle_id") {
    allNames[name]++
  }
  else if(name === "vehicle_id") {
    allNames[name] = 1
  }
  return allNames
}, {})

console.log(finalResult)
于 2020-07-01T11:24:35.287 回答