Конкретное значение из содержимого ответа HTTP C#

Мне было интересно, как я могу извлечь конкретное значение из содержимого ответа HTTP. Скажем, страница, с которой я делаю запрос getAsync, возвращает ответ, и в этом ответе мне нужно извлечь значение passwird. Как я могу получить значение пароля веб-сайта внутри этого метода getAsync?Конкретное значение из содержимого ответа HTTP C#

вот мой код:

async static void DownloadPage(string url) 
    { 
     CookieContainer cookies = new CookieContainer(); 
     HttpClientHandler handler = new HttpClientHandler(); 
     handler.CookieContainer = cookies; 

     using (HttpClient client = new HttpClient(handler)) 
     { 
      using (HttpResponseMessage response = client.GetAsync("https://www.kijiji.ca/t-login.html").Result) 
      { 

       HttpHeaders headers = response.Headers; 
       HttpContent content = response.Content; 
       string myContent = await content.ReadAsStringAsync(); 



      } 

     }

это ответ я получаю обратно:

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источник

2016-08-05 Puzzle

Что такое ответ? Что находится в вашем 'myContent' после этого кода? – mariocatch

Как выглядит ответ? каково все содержание ответа? это JSON или XML? –

это все между . – Puzzle

Update:

Если вы хотите получить значение конкретного элемента, вам необходимо проанализировать содержимое страницы, которую вы получили. Есть много пакетов, что там может разобрать HTML для вас, поэтому вам не придется вручную делать это, например, HTML Agility: http://www.nuget.org/packages/HtmlAgilityPack

Если вы хотите сделать это вручную, мы надеемся, это может заставить вас начать:

static void DownloadPage() 
{ 
    CookieContainer cookies = new CookieContainer(); 
    HttpClientHandler handler = new HttpClientHandler(); 
    handler.CookieContainer = cookies; 

    using (HttpClient client = new HttpClient(handler)) 
    { 
     using (HttpResponseMessage response = client.GetAsync("https://www.kijiji.ca/t-login.html").Result) 
     { 
      HttpHeaders headers = response.Headers; 
      HttpContent content = response.Content; 
      string myContent = content.ReadAsStringAsync().Result; 

      // Find value of ASOtherLang. 
      // It's in this pattern: 
      // <input type="hidden" id="ASOtherLang" value="fr_CA"/> 
      Regex regex = new Regex("id=\"ASOtherLang\" value=\"(.*)\""); 
      var otherLang = regex.Match(myContent).Groups[1]; 
      Console.WriteLine(otherLang); 
     } 
    } 
}

Это звучит, как вы просите, чтобы получить значение ввода пароля, отправив запрос GET на веб-сайт. Это невозможно сделать (если в этом вводе не было значения по умолчанию).

вход вы вернулись из вашего запроса GET является:

<input id="login-password" name="password" req="req" type="password" value="" maxlength="64"/>

Там нет ничего, что вы можете делать с этим, что даст вам пароль для входа в систему с.

источник

2016-08-05 02:54:31 mariocatch

Я понимаю, что, но я просто дал это в качестве примера. Есть много других вещей, которые я мог бы получить также правильно. Например, скажем, я хочу, чтобы значение «fr_CA» было частью ответа. Как я могу его получить? @mariocatch – Puzzle

@Puzzle Я добавил фрагмент, который, надеюсь, начнется. – mariocatch

nice Получил это с htmlAgilityPack. Спасибо. @mariocatch – Puzzle

Попробуйте это:

HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument(); 
doc.LoadHtml(myContent); 
var r = doc.DocumentNode.Descendants(); 
var htmlTextBox = doc.DocumentNode.Descendants().FirstOrDefault(x => x.Name=="input" && x.Id=="login-password"); 
if (htmlTextBox != null) 
{ 
    var passwordBoxHtml = htmlTextBox.OuterHtml; 
}

, который дает вам результат, как <input id="login-password" name="password" req="req" type="password" value="" maxlength="64"> в passwordBoxHtml.

Для этого вы должны использовать HtmlAgilityPack, которая доступна из nuget

источник

2016-08-05 03:32:06

Благодарим вас за помощь. Но я уже нашел ответ спасибо :) – Puzzle

Рад это услышать, спасибо –

Конкретное значение из содержимого ответа HTTP C#

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