Извлечение Извлечение из Википедии API

Question

Так я получаю ответ JSON, который выглядит следующим образом:

{ 
"batchcomplete": "", 
"query": { 
    "pages": { 
     "97646": { 
      "pageid": 97646, 
      "ns": 0, 
      "title": "Die Hard", 
      "extract": "Die Hard is a 1988 American action film directed by John McTiernan and written by Steven E. de Souza and Jeb Stuart. It follows off-duty New York City Police Department officer John McClane (Bruce Willis) as he takes on a group of highly organized criminals led by Hans Gruber (Alan Rickman), who perform a heist in a Los Angeles skyscraper under the guise of a terrorist attack using hostages, including McClane's wife Holly (Bonnie Bedelia), to keep the police at bay.\nIt is based on Roderick Thorp's 1979 novel Nothing Lasts Forever, the sequel to 1966's The Detective, which was adapted into a 1968 film of the same name that starred Frank Sinatra. Fox was therefore contractually obligated to offer Sinatra the lead role in Die Hard, but he turned it down. The studio then pitched the film to Arnold Schwarzenegger as a sequel to his 1985 action film Commando; he turned it down, as well, and the studio finally and reluctantly gave it to Willis, then known primarily as a comedic television actor.\nMade for $28 million, Die Hard grossed over $140 million theatrically worldwide, and was given a positive reception from critics. The film turned Willis into an action star, became a metonym for an action film in which a lone hero fights overwhelming odds, and has been named one of the best action movies ever made. The film also ranks #29 on Empire magazine's 2008 list of the 500 greatest movies of all time. The film's success spawned the Die Hard franchise, which includes four sequels (Die Hard 2, Die Hard with a Vengeance, Live Free or Die Hard and A Good Day to Die Hard), video games, and a comic book." 
     } 
    } 
} 
} 

Вот ссылка: https://en.wikipedia.org/w/api.php?format=jsonfm&action=query&prop=extracts&exintro=&explaintext=&titles=Die%20Hard

И я хочу, чтобы просто получить выписку страницы. Проблема в том, что я не знаю страницы, пока не получаю ответ, и поэтому не могу вызвать экстракт.

Чтобы получить выписку для этого примера я должен был бы сделать:

var data = JSON.parse(this.response); 
console.log(suggestionData.query.pages.97646.extract); 

Так что я пытался получить значение идентификатора страницы, сделав его переменную, чтобы добавить в запрос, как это:

var data = JSON.parse(this.response); 
var pageid = [suggestionData.query.pages[0]; 
console.log(suggestionData.query.pages. + pageid +.extract); 

Но это не было successeful как переменная PageId приходит как:

"97646": { 
      "pageid": 97646, 
      "ns": 0, 
      "title": "Die Hard", 
      "extract": "Die Hard is a 1988 American action film directed by John McTiernan and written by Steven E. de Souza and Jeb Stuart. It follows off-duty New York City Police Department officer John McClane (Bruce Willis) as he takes on a group of highly organized criminals led by Hans Gruber (Alan Rickman), who perform a heist in a Los Angeles skyscraper under the guise of a terrorist attack using hostages, including McClane's wife Holly (Bonnie Bedelia), to keep the police at bay.\nIt is based on Roderick Thorp's 1979 novel Nothing Lasts Forever, the sequel to 1966's The Detective, which was adapted into a 1968 film of the same name that starred Frank Sinatra. Fox was therefore contractually obligated to offer Sinatra the lead role in Die Hard, but he turned it down. The studio then pitched the film to Arnold Schwarzenegger as a sequel to his 1985 action film Commando; he turned it down, as well, and the studio finally and reluctantly gave it to Willis, then known primarily as a comedic television actor.\nMade for $28 million, Die Hard grossed over $140 million theatrically worldwide, and was given a positive reception from critics. The film turned Willis into an action star, became a metonym for an action film in which a lone hero fights overwhelming odds, and has been named one of the best action movies ever made. The film also ranks #29 on Empire magazine's 2008 list of the 500 greatest movies of all time. The film's success spawned the Die Hard franchise, which includes four sequels (Die Hard 2, Die Hard with a Vengeance, Live Free or Die Hard and A Good Day to Die Hard), video games, and a comic book." 
} 

I также хотите использовать JavaScript и не JQuery и т.д.

Answer 1

Попробуйте эту скрипку: https://jsfiddle.net/u9dnm70b/

var response = '{"batchcomplete": "","query": {"pages": {"97646": {"extract": "abcd" }}}}'; 
var suggestionData = JSON.parse(response); 
var pageid = Object.keys(suggestionData.query.pages)[0]; 
console.log(suggestionData.query.pages[pageid].extract); 

Answer 2

Вы можете извлечь PageId так:

var pageid = Object.keys(suggestionData.query.pages)[0]; 

Тогда это должно работать:

console.log(suggestionData.query.pages[pageid].extract"); 

Answer 3

Вы можете использовать Object.keys(jsonObj);, чтобы узнать ключи. В вашем случае var pageid является объектом json. Для доступа к значению, посмотрите на эту тему (get keys of json-object in JavaScript)

В короткий ответ

for key in pageid 
    content= pageid[key] 
    extract = content.extract