/// <summary>
/// Submit a parameterized HTTP request by either GET or POST. The
/// caller can ask for the response either as a string or as a stream.
/// </summary>
/// <remarks>
/// If getResponse = false, the responseStream can be used by the caller
/// to read the response. The caller must call Close() when done with the stream.
/// If getResponse = true, the stream will be null, and Close() should not be called.
/// </remarks>
/// <param name="url">The URL to request</param>
/// <param name="doPost">POST if true, GET if false.</param>
/// <param name="requestParameters">A set of parameter/value pairs, in unencoded form.</param>
/// <returns>Response from Web.</returns>
public WebAccessorResponse SubmitHttpRequest(
Uri url,
bool doPost,
Dictionary <string, string> requestParameters)
{
WebAccessorResponse webAccessorResponse = new WebAccessorResponse();
try
{
WebRequest request = null;
string queryString = BuildQueryString(requestParameters);
if (doPost)
{
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] postBytes = encoding.GetBytes(queryString);
request = CreatePostRequest(url, CredentialCache.DefaultCredentials, postBytes.Length);
Stream requestStream = request.GetRequestStream();
requestStream.Write(postBytes, 0, postBytes.Length);
requestStream.Close();
}
else
{
request = CreateGetRequest(url, queryString, CredentialCache.DefaultCredentials);
}
Close(); // get rid of any old response
webResponse = (HttpWebResponse)request.GetResponse();
webAccessorResponse.StatusDescription = webResponse.StatusDescription;
if (webAccessorResponse.StatusDescription == "OK")
{
Stream s = webResponse.GetResponseStream();
using (StreamReader reader = new StreamReader(s))
{
webAccessorResponse.ResponseString = reader.ReadToEnd();
}
Close();
webAccessorResponse.IsSuccessful = true;
return(webAccessorResponse);
}
webAccessorResponse.IsSuccessful = false;
return(webAccessorResponse);
}
catch (WebException we)
{
HttpWebResponse response = (HttpWebResponse)we.Response;
if (response == null)
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}{1}",
webAccessorResponse.StatusDescription,
we.Message);
if (we.InnerException != null)
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}\n{1}",
webAccessorResponse.StatusDescription,
we.InnerException.Message);
}
}
else
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}WebException: {1}",
webAccessorResponse.StatusDescription,
response.StatusDescription);
}
}
catch (Exception ex)
{
webAccessorResponse.StatusDescription = ex.Message;
if (ex.InnerException != null)
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}\n{1}",
webAccessorResponse.StatusDescription,
ex.InnerException.Message);
}
}
webAccessorResponse.IsSuccessful = false;
return(webAccessorResponse);
}
/// <summary>
/// Submit a parameterized HTTP request by either GET or POST. The
/// caller can ask for the response either as a string or as a stream.
/// </summary>
/// <remarks>
/// If getResponse = false, the responseStream can be used by the caller
/// to read the response. The caller must call Close() when done with the stream.
/// If getResponse = true, the stream will be null, and Close() should not be called.
/// </remarks>
/// <param name="url">The URL to request</param>
/// <param name="doPost">POST if true, GET if false.</param>
/// <param name="requestParameters">A set of parameter/value pairs, in unencoded form.</param>
/// <returns>Response from Web.</returns>
public WebAccessorResponse SubmitHttpRequest(
Uri url,
bool doPost,
Dictionary <string, string> requestParameters)
{
WebAccessorResponse webAccessorResponse = new WebAccessorResponse();
try
{
ASCIIEncoding encoding = new ASCIIEncoding();
StringBuilder paramBlock = new StringBuilder();
string separator = string.Empty;
foreach (KeyValuePair <string, string> kvp in requestParameters)
{
paramBlock.Append(separator);
separator = "&";
paramBlock.Append(HttpUtility.UrlEncode(kvp.Key));
if (!string.IsNullOrEmpty(kvp.Value))
{
paramBlock.Append("=");
paramBlock.Append(HttpUtility.UrlEncode(kvp.Value));
}
}
WebRequest request;
if (doPost)
{
byte[] postBytes = encoding.GetBytes(paramBlock.ToString());
request = WebRequest.Create(url);
request.Proxy = _proxy;
request.Credentials = CredentialCache.DefaultCredentials;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postBytes.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(postBytes, 0, postBytes.Length);
requestStream.Close();
}
else
{
url = new Uri(string.Format(CultureInfo.InvariantCulture,
"{0}?{1}",
url.ToString(),
paramBlock));
request = WebRequest.Create(url);
request.Proxy = _proxy;
request.Credentials = CredentialCache.DefaultCredentials;
request.Method = "GET";
}
Close(); // get rid of any old response
_webResponse = (HttpWebResponse)request.GetResponse();
webAccessorResponse.StatusDescription = _webResponse.StatusDescription;
if (webAccessorResponse.StatusDescription == "OK")
{
using (Stream s = _webResponse.GetResponseStream())
{
using (StreamReader reader = new StreamReader(s))
{
webAccessorResponse.ResponseString = reader.ReadToEnd();
}
}
Close();
webAccessorResponse.IsSuccessful = true;
return(webAccessorResponse);
}
webAccessorResponse.IsSuccessful = false;
return(webAccessorResponse);
}
catch (WebException we)
{
HttpWebResponse response = (HttpWebResponse)we.Response;
if (response == null)
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}{1}",
webAccessorResponse.StatusDescription,
we.Message);
if (we.InnerException != null)
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}\n{1}",
webAccessorResponse.StatusDescription,
we.InnerException.Message);
}
}
else
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}WebException: {1}",
webAccessorResponse.StatusDescription,
response.StatusDescription);
}
}
catch (Exception ex)
{
webAccessorResponse.StatusDescription = ex.Message;
if (ex.InnerException != null)
{
webAccessorResponse.StatusDescription = string.Format(CultureInfo.InvariantCulture,
"{0}\n{1}",
webAccessorResponse.StatusDescription,
ex.InnerException.Message);
}
}
webAccessorResponse.IsSuccessful = false;
return(webAccessorResponse);
}
