/// <summary>
/// Performs request processing just prior to execution but after the IWebRequest has called.
/// </summary>
private HttpRequestMessage PreProcessRequest(ref string relativeUrl, ref HttpMethod method, IList <NameValuePair <string> > additionalHeaders)
{
//see if we've ever attempted a request - if not we're going to do some first time things.
if (m_FirstRequest)
{
m_UseCompatibilityMethods = GetUseCompatiblilityMethodsOverride(m_HostName);
m_UseHttpVersion10 = GetUseHttpVersion10Override(m_HostName);
m_FirstRequest = false;
}
//get rid of any leading slashes
relativeUrl = (relativeUrl.StartsWith("/") ? relativeUrl.Substring(1) : relativeUrl);
var request = new HttpRequestMessage(method, relativeUrl);
//put in any additional headers we got. By doing them first, if they conflict with one of our headers
//the conflict will be resolved in favor of the base implementation, forcing the dev to deal with their error first.
if (additionalHeaders != null)
{
foreach (NameValuePair <string> additionalHeader in additionalHeaders)
{
request.Headers.Add(additionalHeader.Name, additionalHeader.Value);
}
}
//see if we need to override the method. I'm just sick and tired of !@%@ IIS blocking PUT and DELETE.
if (m_UseCompatibilityMethods)
{
if (method == HttpMethod.Put || method == HttpMethod.Delete)
{
request.Headers.Add(HeaderRequestMethod, method.Method);
//and override the method back to post, which will work.
method = HttpMethod.Post;
request.Method = method;
}
}
request.Version = (m_UseHttpVersion10) ? new Version(1, 0) : new Version(1, 1);
//add our request timestamp so everyone agrees.
request.Headers.Add(HeaderRequestTimestamp, DateTimeOffset.UtcNow.ToString("o"));
//and if we have a protocol version the caller is using specify that so the server knows.
if (AppProtocolVersion != null)
{
request.Headers.Add(HeaderRequestAppProtocolVersion, AppProtocolVersion.ToString());
}
//Extension our authentication headers if there is an authentication object
if (m_AuthenticationProvider != null)
{
m_AuthenticationProvider.PreProcessRequest(this, m_Connection, request, relativeUrl, m_RequestSupportsAuthentication);
}
return(request);
}
