Question

我正在尝试使用请求nodejs模块访问JSON GET响应中的属性。

当我收到回复时，我似乎无法打印特定属性。每次我尝试打印属性时，我都会收到一个错误，说明它未定义。

我尝试了字符串化和解析JSON，但两者都不起作用。提前谢谢。

var request = require("request");

//The search query
var query = "TGI fridays";

//path of http request
var path = "https://maps.googleapis.com/maps/api/place/textsearch/json?query="+query+"&sensor=false&key=AIzaSyA-adbJAXBmOTGINrhWHskm4d7UU9dgnOU";


//function to print the json
var parser = function(text){
    console.log(text);


}
//http request with callback
request(path,function(error, response, body){
    parser(body.next_page_token); //a property from the json that comes up as undefined
})

继承了一些json

    {
   "debug_info" : [],
   "html_attributions" : [],
   "next_page_token" : "CjQsAAAAM5EDuFB7u9bIQ_3KeBsa894EjYv4ca3GVN45O2cBPWUaDFkebH7r_WQy2Jf-QqZZEhDUipJwL4YXDtanJ0euTGe4GhTs6PW_jM0Ops33vWwD-5aGsk7giQ",
   "results" : [
      {
         "formatted_address" : "403 Camino Del Rio South, San Diego, CA, United States",
         "geometry" : {
            "location" : {
               "lat" : 32.760091,
               "lng" : -117.161897
            }
         },
         "icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/bar-71.png",
         "id" : "29f39df87b93cf8b98062fdccc877a61fb45925a",
         "name" : "TGI Fridays",
         "opening_hours" : {
            "open_now" : true
         },
         "photos" : [
            {
               "height" : 782,
               "html_attributions" : [],
               "photo_reference" : "CoQBdgAAAFw5rZL8KjKfsBudSV-fNyRQUy5kflYnWJUrsN8PHzVsrP8v3R5eCKkRJOUj8fXnAtXnZZ34G5BRoNys7mLd0QJ3LEj-tLeY9LSs4B9jOyNpaNAszEZDh9kyQkfWr4POMxqwKCYN5gxFsMB4-NvGoG3sFZaOOySOKs6vVNPPL9fVEhCKe8eESOot42-Zxm4MBPPaGhSsiMuJbzuIzOpqTcEHEsL1c6GXYg",
               "width" : 1146
            }
         ],
         "price_level" : 2,
         "rating" : 3.2,
         "reference" : "CnRpAAAAp9SAKVfthj4gk3rSghMmI3_ZJaGTzGPhVtDsdtSyG3WunYPrYEN7dAA0iEmmsTLx3ANN9FAZZ6bVNnyUxWAwEFe8a-IsTSJZwNTYq-6fMujMZJgjTWgSSWo5LXy88NdccA3l-PQ2pX2Dnz4SnLy0dhIQ_hVBBDjk8QV2oOS-THq3BBoUKOSwQjmKFn5KeJq43p4JIkANwPU",
         "types" : [ "bar", "restaurant", "food", "establishment" ]
      },

Answer 1

Body是一个字符串。尝试：

//http request with callback
request(path,function(error, response, body){
    body = JSON.parse(body);
    parser(body.next_page_token); //a property from the json that comes up as undefined
})

结果（非常大的字符串）：

CjQsAAAAls3nW7k5vyODIeouCv_HT_PBhB9s7KNftqBRiDWtJR3RY_KOLthW4TFj-2HNlnezEhDiq73Z83kFvtpQqWfuBb-AGhT6yoVHZHNe1EmM3UWe34jfs65oHg

注意：您也可以使用此表单告诉request您期望json：

request.get({url: path, json:true},function(error, response, body){
    parser(body.next_page_token); //a property from the json that comes up as undefined
})

Nodejs JSON属性未定义

1 个答案: