/// <summary>Rolls a generic GET request to Atlas</summary>
/// <param name="uri"></param>
/// <returns></returns>
protected async Task <HttpResponseMessage> GetRequest(Uri uri)
{
HttpResponseMessage final = null;
if (uri == null || String.IsNullOrWhiteSpace(uri.AbsoluteUri))
{
return(final);
}
// setup a new client
HttpClient client = this.Client(uri);
// setup the first request
HttpRequestMessage req1 = new HttpRequestMessage(HttpMethod.Get, uri);
req1.Headers.Clear();
// send the 'login' request
HttpResponseMessage resp1 = await client.SendAsync(req1);
// at this point we expect a 401 with details for the Authorization header
// pull apart the auth response
string authHeader = resp1.Headers.WwwAuthenticate?.ToString();
WWWAuthFields header = this.ParseWWWAuth(authHeader);
// send a 2nd request with Authorization populated with details from www-authenticate
HttpRequestMessage req2 = new HttpRequestMessage(HttpMethod.Get, uri);
req2.Headers.Clear();
req2.Headers.Add("Authorization", GetDigestHeader(uri.AbsolutePath, header, HttpMethod.Get));
final = await client.SendAsync(req2);
return(final);
}
/// <summary>Pause or resume the specified cluster</summary>
/// <param name="projID"></param>
/// <param name="clusterName"></param>
/// <param name="pause">Pass true to pause the cluster, false to resume the cluster</param>
/// <returns></returns>
/// <remarks>PATCH is similar to POST but Pause is the only method using this for now so its not yet broken out</remarks>
public async Task <AtlasCluster> PauseCluster(string projID, string clusterName, bool pause = false)
{
if (String.IsNullOrWhiteSpace(projID) || String.IsNullOrWhiteSpace(clusterName))
{
return(null);
}
projID = projID.Trim();
clusterName = clusterName.Trim();
Uri uri = new Uri($"{_apiBase}{_dir}/groups/{projID}/clusters/{clusterName}");
HttpResponseMessage final = null;
try
{
// make a client
HttpClient client = this.Client(uri);
// roll the body
string body = JsonConvert.SerializeObject(new { paused = pause }).ToLower();
HttpRequestMessage req1 = new HttpRequestMessage(HttpMethod.Patch, uri);
req1.Headers.Clear();
// add the body
req1.Content = new StringContent(body, Encoding.UTF8, "application/json");
byte[] bytes = Encoding.UTF8.GetBytes(body);
req1.Content.Headers.Add("Content-Length", bytes.Length.ToString());
// send the first request
HttpResponseMessage resp1 = await client.SendAsync(req1);
// at this point we expect a 401 with details for the Authorization header
// pull apart the auth response
string authHeader = resp1.Headers.WwwAuthenticate?.ToString();
WWWAuthFields header = this.ParseWWWAuth(authHeader);
// send a 2nd request with Authorization populated with details from www-authenticate
HttpRequestMessage req2 = new HttpRequestMessage(HttpMethod.Patch, uri);
req2.Headers.Clear();
req2.Headers.Add("Authorization", this.GetDigestHeader(uri.AbsolutePath, header, HttpMethod.Patch));
// add the body again
req2.Content = req1.Content;
// send the 2nd request
final = await client.SendAsync(req2);
}
catch (System.Exception)
{
throw;
}
string json = (IsGZipped(final)) ? Decompress(final) : await final.Content.ReadAsStringAsync();
return(JsonConvert.DeserializeObject <AtlasCluster>(json));
}
/// <summary>Create an Auth Header Digest</summary>
/// <remarks>If you continue to use the orginal Auth request you need to increment the nonce value each request</remarks>
private string GetDigestHeader(string dir, WWWAuthFields header, HttpMethod method)
{
// increment on subsequent calls if you re-use
int nc = 1;
// create a client nonce
string cnonce = this.Noncer(8);
string h1 = $"{_publicKey}:{header.Realm}:{_privateKey}".HashToMD5();
string h2 = $"{method.ToString().ToUpperInvariant()}:{dir}".HashToMD5();
string resp = $"{h1}:{header.Nonce}:{nc:00000000}:{cnonce}:{header.QoP}:{h2}".HashToMD5();
return($"Digest username=\"{_publicKey}\", realm=\"{header.Realm}\", nonce=\"{header.Nonce}\", uri=\"{dir}\", algorithm=MD5, response=\"{resp}\", qop={header.QoP}, nc={nc:00000000}, cnonce=\"{cnonce}\"");
}
/// <summary>Parses all the WWW Auth Fields to a struct</summary>
/// <param name="header"></param>
/// <returns></returns>
/// <remarks>
/// Use whatever parsing technique makes you happy. A couple are in StringExtensions
/// An www auth header will look something like this
/// Digest realm="MMS Public API", domain="", nonce="kWVA9Ciu7lNaN5QdjPe8kxPMReVjbt+B", algorithm=MD5, qop="auth", stale=false
/// </remarks>
private WWWAuthFields ParseWWWAuth(string header)
{
WWWAuthFields results = new WWWAuthFields();
if (String.IsNullOrWhiteSpace(header))
{
return(results);
}
Dictionary <string, string> dict = header.PairsToDictionary(true);
results.Realm = (dict.ContainsKey("realm")) ? dict["realm"] : String.Empty;
results.Nonce = (dict.ContainsKey("nonce")) ? dict["nonce"] : String.Empty;
results.QoP = (dict.ContainsKey("qop")) ? dict["qop"] : String.Empty;
return(results);
}
