我正在编写一个.dll
来执行Gets and Posts
。
为了做到这一点,我创建了这个类:
public class BDCWebRequests
{
// private attributes
private static CookieContainer m_CookieJar;
private static HttpWebRequest m_HttpWebRequest;
private static string m_defaultUserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/13.0.782.107 Safari/535.1";
private static string m_defaultContentType = "application/x-www-form-urlencoded";
// Public Properties
public HttpWebRequest InternalWebRequest
{
get { return m_HttpWebRequest; }
}
/// <summary>
/// Class Constructor
/// </summary>
public BDCWebRequests()
{
m_CookieJar = new CookieContainer();
}
// Methods Come Here...
}
我想要实现的是这个lib的用户使用“InternalWebRequest”属性正确配置请求的方法。
用法如下:
BDCWebRequests myInstance = new BDCWebRequests();
myInstance.InternalWebRequest.Referer = "refererUrl";
myInstance.AllowAutoRedirect = true;
myInstance.Host = "hostUrl";
这样做之后,有Posts and Get Methods
(这里是GET作为例子)
public string Get(string url)
{
try
{
// Creating instance of HttpWebRequest based on URL received
m_HttpWebRequest = (HttpWebRequest) WebRequest.Create (url);
m_HttpWebRequest.Method = "GET";
m_HttpWebRequest.UserAgent = m_defaultUserAgent;
// Execute web request and wait for response
using (HttpWebResponse resp = (HttpWebResponse) m_HttpWebRequest.GetResponse())
{
return new StreamReader(resp.GetResponseStream()).ReadToEnd();
}
}
catch (Exception ex)
{
LogWriter.Error(ex);
}
return String.Empty;
}
用法:
myInstance.Get("UrlForTheRequest");
主要问题: 当用户执行GET或POST时,我遇到问题,之后,他尝试使用公共属性更改HttpWebRequest的内部实例的任何属性。
例如,如果用户调用GET,之后他会尝试:
例如, myInstance.InternalWebRequest.Host = ""
会抛出错误:
"this property cannot be set after writing has started"
如何以逻辑方式实现它以便用户可以:
1 - 随时随地配置请求,而不会出现此错误 2 - 使用先前配置的请求执行获取和发布?
对不起那个长问题,请提前感谢您的耐心等待。 请不要TL:DR:)
答案 0 :(得分:1)
简单:您发送请求的那一刻,从响应中读取所有必需的数据,然后创建一个新请求,并将旧请求中的所有相关参数复制到它。