public void CopyCookies(HttpContext context, HttpWebRequest remoteRequest, HostMappingOptions mapping, List <TransientCookie> transientCookies, IEnumerable <string> internalCookies = null)
{
var originalRequest = context.Request;
if (originalRequest.Cookies == null || originalRequest.Cookies.Count == 0)
{
return;
}
var cookies = originalRequest.Cookies;
if (remoteRequest.CookieContainer == null)
{
remoteRequest.CookieContainer = new CookieContainer();
}
var cookiesToEncode = context.Items[Constants.HTTP_CONTEXT_COOKIES_TO_ENCODE_KEY] as List <string>;
var cookiesToAdd = transientCookies?.Where(cookie => cookie.Action == TransientCookieAction.Add);
var cookiesToUpdate = transientCookies?.Where(cookie => cookie.Action == TransientCookieAction.Update);
var cookiesToRemove = transientCookies?.Where(cookie => cookie.Action == TransientCookieAction.Delete);
foreach (var cookie in cookies)
{
if (internalCookies.Contains(cookie.Key))
{
continue;
}
if (cookiesToRemove != null
&&
cookiesToRemove.Any(transientCookie => transientCookie.Name.Equals(cookie.Key)))
{
continue;
}
if (cookiesToUpdate != null
&&
cookiesToUpdate.Any(transientCookie => transientCookie.Name.Equals(cookie.Key)))
{
var cookieToUpdate = cookiesToUpdate.FirstOrDefault(transientCookie => transientCookie.Name.Equals(cookie.Key));
AddCookie(remoteRequest, cookieToUpdate.Name, cookieToUpdate.Value);
continue;
}
UpdateCookieForRemoteRequest(context, remoteRequest, cookie, mapping, cookiesToEncode);
}
if (cookiesToAdd != null)
{
foreach (var cookie in cookiesToAdd)
{
AddCookie(remoteRequest, cookie.Name, cookie.Value);
}
}
}
public void CopyHeaders(HttpContext context, HttpWebResponse remoteResponse, HostMappingOptions mapping)
{
var originalResponse = context.Response;
originalResponse.StatusCode = (int)remoteResponse.StatusCode;
string cookiePrefix = string.Empty;
for (var i = 0; i < remoteResponse.Headers.Count; i++)
{
var headerKey = remoteResponse.Headers.GetKey(i);
switch (headerKey)
{
case HttpHeaders.SetCookie:
foreach (var value in remoteResponse.Headers.GetValues(i))
{
originalResponse.Headers.Append(HttpHeaders.SetCookie, Regex.Replace(value, mapping.DownstreamHost, mapping.ServingHost, RegexOptions.IgnoreCase));
}
break;
case HttpHeaders.AccessControlAllowOrigin:
case HttpHeaders.Location:
if (Uri.IsWellFormedUriString(remoteResponse.Headers[headerKey], UriKind.Absolute))
{
originalResponse.Headers.Add(headerKey, new UriBuilder(remoteResponse.Headers[headerKey]).ReplaceHost(mapping.DownstreamHost, mapping.ServingHost, mapping.ServingScheme));
}
else
{
originalResponse.Headers.Add(headerKey, remoteResponse.Headers[headerKey].Replace(mapping.DownstreamHost, mapping.ServingHost));
}
break;
case HttpHeaders.ContentLength:
case HttpHeaders.Connection:
case HttpHeaders.KeepAlive:
case HttpHeaders.ProxyAuthenticate:
case HttpHeaders.Trailer:
case HttpHeaders.TransferEncoding:
case HttpHeaders.Upgrade:
case HttpHeaders.WWWAuthenticate:
case HttpHeaders.ContentEncoding:
break;
default:
originalResponse.Headers.Add(headerKey, remoteResponse.Headers[headerKey]);
break;
}
}
}
public void CopyHeaders(HttpContext context, HttpWebRequest remoteRequest, HostMappingOptions mapping)
{
var originalRequest = context.Request;
remoteRequest.Method = originalRequest.Method;
remoteRequest.ContentType = originalRequest.ContentType;
remoteRequest.AllowAutoRedirect = false;
remoteRequest.KeepAlive = false;
remoteRequest.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
foreach (var headerKey in originalRequest.Headers.Keys)
{
if (remoteRequest.Headers[headerKey] != null)
{
continue;
}
switch (headerKey)
{
case HttpHeaders.UserAgent:
remoteRequest.UserAgent = originalRequest.Headers[HttpHeaders.UserAgent];
break;
case HttpHeaders.Accept:
remoteRequest.Accept = originalRequest.Headers[headerKey];
break;
case HttpHeaders.Host:
remoteRequest.Host = new HostString(mapping.DownstreamHost).ToUriComponent();
break;
case HttpHeaders.IfModifiedSince:
DateTime modifiedSinceDate;
if (DateTime.TryParse(originalRequest.Headers[headerKey], out modifiedSinceDate))
{
remoteRequest.IfModifiedSince = modifiedSinceDate;
}
break;
case HttpHeaders.Referer:
string refererHeaderValue = originalRequest.Headers[headerKey];
if (Uri.IsWellFormedUriString(refererHeaderValue, UriKind.Absolute))
{
remoteRequest.Referer = new UriBuilder(refererHeaderValue).ReplaceHost(mapping.ServingHost, mapping.DownstreamHost, mapping.DownstreamScheme);
}
else
{
remoteRequest.Referer = refererHeaderValue.Replace(mapping.ServingHost, mapping.DownstreamHost);
}
break;
case HttpHeaders.Origin:
string originHeaderValue = originalRequest.Headers[headerKey];
if (Uri.IsWellFormedUriString(originHeaderValue, UriKind.Absolute))
{
remoteRequest.Headers.Add(headerKey, new UriBuilder(originHeaderValue).ReplaceHost(mapping.ServingHost, mapping.DownstreamHost, mapping.DownstreamScheme));
}
else
{
remoteRequest.Headers.Add(headerKey, originHeaderValue.Replace(mapping.ServingHost, mapping.DownstreamHost));
}
break;
case HttpHeaders.Expect:
remoteRequest.Expect = originalRequest.Headers[headerKey];
break;
case HttpHeaders.Date:
DateTime requestDate;
if (DateTime.TryParse(originalRequest.Headers[headerKey], out requestDate))
{
remoteRequest.Date = requestDate;
}
break;
case HttpHeaders.Range:
var ranges = ParseRangeHeaderValue(originalRequest.Headers[headerKey]);
foreach (var range in ranges)
{
if (range.Start.HasValue && range.End.HasValue)
{
remoteRequest.AddRange(range.Start.Value, range.End.Value);
}
else if (range.Start.HasValue)
{
remoteRequest.AddRange(range.Start.Value);
}
else
{
remoteRequest.AddRange(-range.End.Value);
}
}
break;
case HttpHeaders.Cookie:
case HttpHeaders.ContentLength:
case HttpHeaders.ContentType:
case HttpHeaders.Connection:
case HttpHeaders.KeepAlive:
case HttpHeaders.ProxyAuthorization:
case HttpHeaders.TE:
case HttpHeaders.Upgrade:
case HttpHeaders.AcceptEncoding:
break;
default:
remoteRequest.Headers.Add(headerKey, originalRequest.Headers[headerKey]);
break;
}
}
}
private void UpdateCookieForRemoteRequest(HttpContext context, HttpWebRequest remoteRequest, KeyValuePair <string, string> originalCookie, HostMappingOptions mapping, List <string> cookiesToEncode)
{
var cookieKey = originalCookie.Key.Replace(mapping.ServingHost, mapping.DownstreamHost);
var cookieValue = originalCookie.Value.Replace(mapping.ServingHost, mapping.DownstreamHost);
if (cookiesToEncode != null && cookiesToEncode.Contains(originalCookie.Key))
{
cookieValue = WebUtility.UrlEncode(cookieValue);
}
AddCookie(remoteRequest, cookieKey, cookieValue);
}
