JavaScriptレスポンス文字列をJavaScriptを使用して有効なJSONに変換します

Question

有効なJSONを返すようにサーバーのエンドポイントを変更することはありません。

エンドポイント：http://newsrack.in/stories/servelots/iihs_feeds/16.json

サンプル応答データ：

`var _nr_metadata = { 
     site_base_url : "http://newsrack.in", 
     issue_name : "iihs_feeds", 
     category_name : "Chikungunya", 
     listing_url : "/stories/servelots/iihs_feeds/16" 
    } 
    var _nr_stories = [ 
     { 
    title : "Delhi: Changing weather conditions cause 25 per cent rise in dengue cases", 
    url : "http://indiatoday.intoday.in/story/delhi-changing-weather-conditions-cause-rise-in-dengue-cases/1/1075570.html", 
    source : "India Today| Must Read", 
    date : "26.10.2017", 
    desc : "<a href=\'http://indiatoday.intoday.in/story/delhi-changing-weather-conditions-cause-rise-in-dengue-cases/1/1075570.html?utm_source=rss\'><img src=\'http://media2.intoday.in/indiatoday/images/stories/dengue305_102617022722.jpg\' align=\"left\" hspace=\"2\" height=\"180\" width=\"305\" alt=\"\" border=\"0\"/><\/a>Usually at this time of the year, the virus becomes inactive due to \ntemperature dip. But experts are witnessing the hostile nature of ades \nmosquitoes." 
    }, 
    { 
    title : "Waste management bye-laws pending approval of LG: Delhi High Court told", 
    url : "http://indianexpress.com/article/delhi/waste-management-bye-laws-pending-approval-of-lg-delhi-high-court-told-4906249/", 
    source : "Delhi – The Indian Express", 
    date : "25.10.2017", 
    desc : "<img alt=\"\" border=\"0\" src=\"http://pixel.wp.com/b.gif?host=indianexpress.com&#038;blog=53855017&#038;post=4906249&#038;subd=indianexpressonline&#038;ref=&#038;feed=1\" width=\"1\" height=\"1\" />" 
    }, 
    { 
    title : "Alarm bells ringing:194 dengue cases in 2 weeks in district", 
    url : "http://www.tribuneindia.com/news/ludhiana/alarm-bells-ringing-194-dengue-cases-in-2-weeks-in-district/486718.html", 
    source : "The Tribune", 
    date : "25.10.2017", 
    desc : "Tribune News Service\nLudhiana, October 24\nThe number of dengue cases is rapidly increasing in the district as 194 confirmed cases have been recorded by the Health Department in the past two weeks.\nA total of 309 confirmed cases and 524 suspected cases of dengue have been reported in the district this year till Monday. According to the Health Department, cases are mostly being reported from the areas on Chandigarh Road in Ludhiana. These include 33-foot Road, GTB Nagar, Mundian Kalan, Guru Nanak Nagar, GK Estate, Jamalpur, Sectors 32 and 39. There are chances that the number of dengue cases could be higher than official reports, say residents.\nThe department had recorded 31 confirmed dengue cases till September 22 and 115 cases till October 10 in these places. Apart from these cases, as many as 10 confirmed cases of chikungunya, which is also spread by bite of infected aedes mosquitoes, have been reported here this year.\nHealth team finds mosquito larvae in 438 containers\nHealth Inspector Manpreet Singh ..." 
    }, 
    { 
    title : "Alarm bells ringing:194 dengue cases in 2 weeks in district", 
    url : "http://www.tribuneindia.com/news/ludhiana/alarm-bells-ringing-194-dengue-cases-in-2-weeks-in-district/486718.html", 
    source : "The Tribune", 
    date : "25.10.2017", 
    desc : "Tribune News Service\nLudhiana, October 24\nThe number of dengue cases is rapidly increasing in the district as 194 confirmed cases have been recorded by the Health Department in the past two weeks.\nA total of 309 confirmed cases and 524 suspected cases of dengue have been reported in the district this year till Monday. According to the Health Department, cases are mostly being reported from the areas on Chandigarh Road in Ludhiana. These include 33-foot Road, GTB Nagar, Mundian Kalan, Guru Nanak Nagar, GK Estate, Jamalpur, Sectors 32 and 39. There are chances that the number of dengue cases could be higher than official reports, say residents.\nThe department had recorded 31 confirmed dengue cases till September 22 and 115 cases till October 10 in these places. Apart from these cases, as many as 10 confirmed cases of chikungunya, which is also spread by bite of infected aedes mosquitoes, have been reported here this year.\nHealth team finds mosquito larvae in 438 containers\nHealth Inspector Manpreet Singh ..." 
    }, 
    { 
    title : "650 new cases of dengue, 48 of chikungunya", 
    url : "http://www.thehindu.com/news/cities/Delhi/650-new-cases-of-dengue-48-of-chikungunya/article19908528.ece", 
    source : "Hindu: Cities", 
    date : "24.10.2017", 
    desc : "More than 1,000 dengue cases reported so far this month" 
    }, 
    '' // Last item -- needed because previous item ends with a comma 
]` 

あなたはサンプルデータが有効なJSONではありません見ることができるように、私は、しかし、キー内の不要なスペースになってしまった、以下の機能を試してみましたこれも問題である。 `

//Step 1 
     function extractjson(strarg){ 
       var found = [],   // an array to collect the strings that are found 
        rxp = /{([^}]+)}/g, 

        curMatch; 
var parsed=[]; 
        // step 2: regex to add quotes 
        var objKeysRegex = /({|,)(?:\s*)(?:')?([A-Za-z_$\.][A-Za-z0-9_ \-\.$]*)(?:')?(?:\s*):/g; 
        while(curMatch = rxp.exec(strarg)) { 

         found.push(curMatch[0].replace(objKeysRegex, "$1\"$2\":")); 
        } 

       //step 3- parse the found data 
       for(i=0;i<found.length;i++){ 
        try { 
         json = JSON.parse(found[i]); 
        } catch (exception) { 
         json = null; 
        } 
       if (json) { 

        //the json is ok 
       parsed.push(JSON.parse(found[i])); 

       }else{ 
       console.log("badjson"); 
     //the json is not ok 

       } 
      } 
      console.log("input length =", found.length, "output length=", parsed.length); 

      return parsed; 
      } 
      } 

`

Answer 1

ここでは、（例えば、変数名の_nr_プレフィックスを探します）データの形式に関するいくつかの仮定をし...パースでかなりナイーブ試みです。私はその文字列をさまざまなvar宣言に分割し、次にJSON.parseを使って評価する前にそれらの間のデータの各セクションを整理することをお勧めします。

let parseJSON = (text) => { 
 
    let quoteKeysAndParse = (text) => { 
 
    //Quote keys in objects 
 
    let quoted = text.replace(/([\{\[,]\s*)(['"])?([a-zA-Z0-9_]+)(['"])?\s*:/g, '$1"$3": '); 
 
    //Remove the "last item" text 
 
    quoted = quoted.replace(/,\s+'' \/\/ Last item[^\]^}]+([\]\}])/g, '$1'); 
 
    //Remove improperly escaping of apostrophes 
 
    quoted = quoted.replace(/([^\\])\\'/g, '$1\''); 
 
    //Parse the JSON 
 
    return JSON.parse(quoted); 
 
    } 
 
    
 
    //Find var declarations 
 
    let declarations = text.match(/var\s+_nr_[^\s]+\s+=\s+/ig), obj = {}, key = null, prevKey = null; 
 
    text = ['',text]; 
 
    //For each variable... 
 
    for(let declaration of declarations){ 
 
    key = declaration.match(/_nr_[^\s]+/)[0]; 
 
    let currentText = text[1].split(declaration); 
 
    text = currentText; 
 
    if(prevKey){ 
 
     //Parse the prior split section 
 
     obj[prevKey] = quoteKeysAndParse(text[0]); 
 
    } 
 
    prevKey = key; 
 
    } 
 
    
 
    //Make sure we process the last section 
 
    if(prevKey){ 
 
    obj[prevKey] = quoteKeysAndParse(text[1]); 
 
    } 
 
    return obj; 
 
} 
 

 
fetch('https://cors-anywhere.herokuapp.com/newsrack.in/stories/servelots/iihs_feeds/16.json') 
 
.then(response => response.text()) 
 
.then(parseJSON) 
 
.then(data => { 
 
    for(let item of data._nr_stories){ 
 
     let div = document.createElement('div'); 
 
     div.innerHTML = `<h3>${item.date} - <a href="${item.url}">${item.title}</a> (${item.source})</h3><p>${item.desc}</p>`; 
 
     document.body.append(div) 
 
    } 
 
});

Answer 2

ここで働いて短いソリューションだ

// ----------------------- DATA ----------------------- 
 
    let code = ` 
 
    var _nr_metadata = { 
 
    site_base_url : "http://newsrack.in", 
 
    issue_name : "iihs_feeds", 
 
    category_name : "Chikungunya", 
 
    listing_url : "/stories/servelots/iihs_feeds/16" 
 
    } 
 
    var _nr_stories = [ 
 
    { 
 
     title : "Alarm bells ringing:194 dengue cases in 2 weeks in district", 
 
     url : "http://www.tribuneindia.com/news/ludhiana/alarm-bells-ringing-194-dengue-cases-in-2-weeks-in-district/486718.html", 
 
     source : "The Tribune", 
 
     date : "25.10.2017", 
 
     desc : "Tribune News Service\nLudhiana, October 24\nThe number of dengue cases is rapidly increasing in the district as 194 confirmed cases have been recorded by the Health Department in the past two weeks.\nA total of 309 confirmed cases and 524 suspected cases of dengue have been reported in the district this year till Monday. According to the Health Department, cases are mostly being reported from the areas on Chandigarh Road in Ludhiana. These include 33-foot Road, GTB Nagar, Mundian Kalan, Guru Nanak Nagar, GK Estate, Jamalpur, Sectors 32 and 39. There are chances that the number of dengue cases could be higher than official reports, say residents.\nThe department had recorded 31 confirmed dengue cases till September 22 and 115 cases till October 10 in these places. Apart from these cases, as many as 10 confirmed cases of chikungunya, which is also spread by bite of infected aedes mosquitoes, have been reported here this year.\nHealth team finds mosquito larvae in 438 containers\nHealth Inspector Manpreet Singh ..." 
 
    }, 
 
    { 
 
     title : "650 new cases of dengue, 48 of chikungunya", 
 
     url : "http://www.thehindu.com/news/cities/Delhi/650-new-cases-of-dengue-48-of-chikungunya/article19908528.ece", 
 
     source : "Hindu: Cities", 
 
     date : "24.10.2017", 
 
     desc : "More than 1,000 dengue cases reported so far this month" 
 
    }, 
 
    ] 
 
    ` 
 

 
    // ---------------------/DATA ------------------------ 
 

 

 
    // --------------------- TREATMENT ------------------------ 
 

 
    
 
    // Add '"' around the property names 
 
    
 
    code = code.replace(/\n +([a-z_]+) +:/g, '"$1" :').replace(/[\n\r]/g,''); 
 

 
    // To avoid unecessary ',' in "}, ]" 
 
    
 
    code = code.replace(/\},[ ]*\]/g,'}]'); 
 

 

 
    // Split by var (keeping var name) 
 
    
 
    code = code.split(/ var(?=[a-z_ ]+= [\[\{])/); 
 
    
 
    // The result to feed 
 
    
 
    let result = {} ; 
 

 
    // Treat each var 
 
    
 
    code.forEach(d => { 
 

 
    d = d.trim(); 
 
    if (!d) { return } 
 
    
 
    // Separate var name and var value 
 
    // Faster? 
 
    let index = d.indexOf('='); 
 
    let var_name = d.substr(0, index).trim(); 
 
    let var_value = d.substr(index+1, d.length).trim(); 
 

 
    // Parse the value 
 
    
 
    try 
 
    { 
 
     result[var_name] = JSON.parse(var_value); 
 
    } 
 
    catch(error) 
 
    { 
 
     console.error(error); 
 
    } 
 
    }) 
 
    
 
    console.log(result);