WebRequest连接到Wikipedia API

Question

这可能是一个非常简单的问题,但我似乎无法格式化web webrequest /响应以从Wikipedia API获取数据.我已经在下面发布了我的代码,如果有人可以帮我看看我的问题.

    string pgTitle = txtPageTitle.Text;

    Uri address = new Uri("http://en.wikipedia.org/w/api.php");

    HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;

    request.Method = "POST";
    request.ContentType = "application/x-www-form-urlencoded";

    string action = "query";
    string query = pgTitle;

    StringBuilder data = new StringBuilder();
    data.Append("action=" + HttpUtility.UrlEncode(action));
    data.Append("&query=" + HttpUtility.UrlEncode(query));

    byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString());

    request.ContentLength = byteData.Length;

    using (Stream postStream = request.GetRequestStream())
    {
        postStream.Write(byteData, 0, byteData.Length);
    }

    using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
    {
        // Get the response stream.
        StreamReader reader = new StreamReader(response.GetResponseStream());

        divWikiData.InnerText = reader.ReadToEnd();
    }

Answer 1

您可能希望首先尝试GET请求,因为它更简单一些(您只需要POST以进行维基百科登录).例如,尝试模拟此请求:

http://en.wikipedia.org/w/api.php?action=query&prop=images&titles=Main%20Page

这是代码:

HttpWebRequest myRequest =
  (HttpWebRequest)WebRequest.Create("http://en.wikipedia.org/w/api.php?action=query&prop=images&titles=Main%20Page");
using (HttpWebResponse response = (HttpWebResponse)myRequest.GetResponse())
{
    string ResponseText;
    using (StreamReader reader = new StreamReader(response.GetResponseStream()))
    {
        ResponseText = reader.ReadToEnd();
    }
}

编辑:他在POST请求中遇到的另一个问题是,The exception is : The remote server returned an error: (417) Expectation failed.可以通过设置来解决:

System.Net.ServicePointManager.Expect100Continue = false;

(这来自:HTTP POST返回错误:417"期望失败.")