[英]Emulate XmlHttpRequest with a .NET WebClient
帶有XmlHttpRequest
AFAIK我可以使用send
方法下載和上傳數據。 但WebClient
有很多方法。 我不想要WebClient
所有功能。 我只是想創建一個模擬XmlHttpRequest
的對象,除了它沒有XSS限制。 我也不關心將響應作為XML或甚至現在作為字符串。 如果我可以把它作為一個足夠好的字節數組。
我認為我可以使用UploadData
作為我的通用方法,但是當嘗試使用它下載數據時它會失敗,即使它返回響應。 那么如何編寫一個行為與XmlHttpRequest
的send
方法一樣的方法呢?
編輯:我在這里找到了一個不完整的類,它正是一個XmlHttpRequest
模擬器。 太糟糕了,整個代碼都丟失了。
您可以嘗試使用此靜態函數來執行相同操作
public static string XmlHttpRequest(string urlString, string xmlContent)
{
string response = null;
HttpWebRequest httpWebRequest = null;//Declare an HTTP-specific implementation of the WebRequest class.
HttpWebResponse httpWebResponse = null;//Declare an HTTP-specific implementation of the WebResponse class
//Creates an HttpWebRequest for the specified URL.
httpWebRequest = (HttpWebRequest)WebRequest.Create(urlString);
try
{
byte[] bytes;
bytes = System.Text.Encoding.ASCII.GetBytes(xmlContent);
//Set HttpWebRequest properties
httpWebRequest.Method = "POST";
httpWebRequest.ContentLength = bytes.Length;
httpWebRequest.ContentType = "text/xml; encoding='utf-8'";
using (Stream requestStream = httpWebRequest.GetRequestStream())
{
//Writes a sequence of bytes to the current stream
requestStream.Write(bytes, 0, bytes.Length);
requestStream.Close();//Close stream
}
//Sends the HttpWebRequest, and waits for a response.
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
if (httpWebResponse.StatusCode == HttpStatusCode.OK)
{
//Get response stream into StreamReader
using (Stream responseStream = httpWebResponse.GetResponseStream())
{
using (StreamReader reader = new StreamReader(responseStream))
response = reader.ReadToEnd();
}
}
httpWebResponse.Close();//Close HttpWebResponse
}
catch (WebException we)
{ //TODO: Add custom exception handling
throw new Exception(we.Message);
}
catch (Exception ex) { throw new Exception(ex.Message); }
finally
{
httpWebResponse.Close();
//Release objects
httpWebResponse = null;
httpWebRequest = null;
}
return response;
}
h :)
您需要使用HttpWebRequest 。
HttpWebRequest rq = (HttpWebRequest)WebRequest.Create("http://thewebsite.com/thepage.html");
using(Stream s = rq.GetRequestStream()) {
// Write your data here
}
HttpWebResponse resp = (HttpWebResponse)rq.GetResponse();
using(Stream s = resp.GetResponseStream()) {
// Read the result here
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.