Question

您好我正在编写一个小任务来学习，查询stackoverflow api 我想在下面实现 ●该日期提出的问题数量 ●所有问题的总观看次数 ●在该日期的所有问题中使用的不同（即没有重复）逗号分隔的标签列表，按字母顺序排列。

我已经完成了api调用，但这不是我所期待的。首先，我没有找到api终点从stackexchange api获取日期问题。任何建议都非常感谢

 static void Main()
    {
      Console.WriteLine("Making stackoverflow API Call...");
        using (var client = new HttpClient(new HttpClientHandler { AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate }))
        {
            client.BaseAddress = new Uri("https://api.stackexchange.com/docs");
           // Int32 unixTimestamp = (Int32) (DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1,0,0,0,0))).TotalSeconds;
            var unixStamp = Helper.ConvertToDateTime("2017, 09, 23, 0, 0, 0");
            var response = client.GetAsync("questions?fromdate="+ unixStamp + "&todate="+ unixStamp + "&site=stackoverflow").Result;
            response.EnsureSuccessStatusCode();
            var s = response.Content.ReadAsStringAsync().Result;
            var result = response.Content.ReadAsStringAsync().Result.Count();
            Console.WriteLine("Total no.of questions asked: " + result);
        }
        Console.ReadLine();
    }

Answer 1

首先，您的基地址应为https://api.stackexchange.com/2.2。要获取在一天内创建的问题数量，您必须修改默认文件管理器以包含total字段。运行以下请求：

/2.2/questions?fromdate=1506211200&todate=1506297600&order=desc&sort=creation&site=stackoverflow&filter=!)5IW-5QudQH7_nJ7d.eBuocQb(B)

将返回：

{
    "items": [],
    "has_more": false,
    "quota_max": 10000,
    "quota_remaining": 9978,
    "total": 3666
}

对于其他两个要求，您应该创建一个包含所需字段的新过滤器（如果您想使用返回的问题，可能需要在过滤器中包含更多字段以避免重复请求）。要创建，请参阅：filter/create和Custom Filters

获得结果后，您必须解析返回的JSON字符串（如果要返回XML，则必须解析XML）。您可以使用Newtonsoft或DataContractJsonSerializer中的内置版本（有关详细信息，请参阅here）。

以下是使用build in serializer的示例：

using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Threading.Tasks;
using System.Net;
using System.Net.Http;
using System.IO;

[DataContract]
public class Question
{
    // Question members...
}

[DataContract]
public class TotalQuestionsResult
{
    [DataMember(Name = "items")]
    public Question[] Items { get; set; }
    [DataMember(Name = "has_more")]
    public bool HasMore { get; set; }
    [DataMember(Name = "quota_max")]
    public int QuotaMax { get; set; }
    [DataMember(Name = "quota_remaining")]
    public int QuotaRemaining { get; set; }
    [DataMember(Name = "total")]
    public int Total { get; set; }
}

public async Task<int> GetTotalNumberOfQuestions()
{
    // Get the data.
    using (var client = new HttpClient(new HttpClientHandler { AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate }))
    {
        client.BaseAddress = new Uri("https://api.stackexchange.com/2.2");
        var response = await client.GetAsync("questions?fromdate=1506211200&todate=1506297600&order=desc&sort=creation&site=stackoverflow&filter=!)5IW-5QudQH7_nJ7d.eBuocQb(B)");
        var responseStream = new MemoryStream(await response.Content.ReadAsByteArrayAsync());
        var serializer = new DataContractJsonSerializer(typeof(TotalQuestionsResult));
        var result = (TotalQuestionsResult)serializer.ReadObject(responseStream);

        return result.Total;
    }
}

调用StackAPI端点

1 个答案: