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Run - added parsing of the http response headers to examine the Refresh header if the response is a 503 (service unavailable). Extract the redirect and redirect delay from the header and follow it. This is to avoid the alternative of trying to calculate the cloudflare challenge/response.

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garreth.jeremiah@gmail.com
2015-12-18 12:03:38 -05:00
parent b5ff430e2d
commit 44d6ac2f04
1 changed files with 31 additions and 2 deletions
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33
src/Jackett/Utils/Clients/HttpWebClient.cs
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@@ -71,9 +71,9 @@ namespace Jackett.Utils.Clients
});
if(webRequest.EmulateBrowser)
client.DefaultRequestHeaders.Add("User-Agent", BrowserUtil.ChromeUserAgent);
client.DefaultRequestHeaders.Add("User-Agent", BrowserUtil.ChromeUserAgent);
else
client.DefaultRequestHeaders.Add("User-Agent", "Jackett/" + configService.GetVersion());
client.DefaultRequestHeaders.Add("User-Agent", "Jackett/" + configService.GetVersion());
HttpResponseMessage response = null;
var request = new HttpRequestMessage();
request.Headers.ExpectContinue = false;
@@ -118,6 +118,35 @@ namespace Jackett.Utils.Clients
var result = new WebClientByteResult();
result.Content = await response.Content.ReadAsByteArrayAsync();
// some cloudflare clients are using a refresh header
// Pull it out manually
if (response.statusCode == System.Net.HttpStatusCode.ServiceUnavailable && response.Headers.Contains("Refresh"))
{
var refreshHeaders = response.Headers.GetValues("Refresh");
var redirval = "";
var redirtime = 0;
if (refreshHeaders != null)
{
foreach (var value in refreshHeaders)
{
var start = value.IndexOf("=");
var end = value.IndexOf(";");
var len = value.Length;
if (start > -1)
{
redirval = value.Substring(start + 1);
result.RedirectingTo = redirval;
// normally we don't want a serviceunavailable (503) to be a redirect, but that's the nature
// of this cloudflare approach..don't want to alter BaseWebResult.IsRedirect because normally
// it shoudln't include service unavailable..only if we have this redirect header.
response.StatusCode = System.Net.HttpStatusCode.Redirect;
redirtime = Int32.Parse(value.Substring(0, end));
System.Threading.Thread.Sleep(redirtime * 1000);
}
}
}
}
if (response.Headers.Location != null)
{
result.RedirectingTo = response.Headers.Location.ToString();