/**
* Convert Dictionary of paremeters to Url encoded query string
*/
internal static string GetParametersAsString(IDictionary <string, string> parameters)
{
StringBuilder data = new StringBuilder(512);
foreach (string key in (IEnumerable <string>)parameters.Keys)
{
string value = parameters[key];
if (value != null)
{
data.Append(key);
data.Append('=');
data.Append(AWSSDKUtils.UrlEncode(value, false));
data.Append('&');
}
}
string result = data.ToString();
return(result.Remove(result.Length - 1));
}
/// <summary>
/// Returns the canonicalized resource path for the service endpoint
/// </summary>
/// <param name="endpoint">Endpoint URL for the request</param>
/// <param name="resourcePath">Resource path for the request</param>
/// <remarks>
/// If resourcePath begins or ends with slash, the resulting canonicalized
/// path will follow suit.
/// </remarks>
/// <returns>Canonicalized resource path for the endpoint</returns>
public static string CanonicalizeResourcePath(Uri endpoint, string resourcePath)
{
if (endpoint != null)
{
var path = endpoint.AbsolutePath;
if (string.IsNullOrEmpty(path) || string.Equals(path, Slash, StringComparison.Ordinal))
{
path = string.Empty;
}
if (!string.IsNullOrEmpty(resourcePath) && resourcePath.StartsWith(Slash, StringComparison.Ordinal))
{
resourcePath = resourcePath.Substring(1);
}
if (!string.IsNullOrEmpty(resourcePath))
{
path = path + Slash + resourcePath;
}
resourcePath = path;
}
if (string.IsNullOrEmpty(resourcePath))
{
return(Slash);
}
// split path at / into segments
var pathSegments = resourcePath.Split(new char[] { SlashChar }, StringSplitOptions.None);
// url encode the segments
var encodedSegments = pathSegments
.Select(segment => AWSSDKUtils.UrlEncode(segment, false))
.ToArray();
// join the encoded segments with /
var canonicalizedResourcePath = string.Join(Slash, encodedSegments);
return(canonicalizedResourcePath);
}
public static AWSPublicIpAddressRanges Load()
{
int num = 0;
while (num < 3)
{
try
{
return(Parse(AWSSDKUtils.DownloadStringContent(IpAddressRangeEndpoint)));
}
catch (Exception innerException)
{
num++;
if (num == 3)
{
throw new AmazonServiceException(string.Format(CultureInfo.InvariantCulture, "Error downloading public IP address ranges file from {0}.", IpAddressRangeEndpoint), innerException);
}
}
AWSSDKUtils.Sleep(Math.Min((int)(Math.Pow(4.0, (double)num) * 100.0), 30000));
}
return(null);
}
private static List <string> GetItems(string relativeOrAbsolutePath, int tries, bool slurp)
{
var items = new List <string>();
try
{
if (!IsIMDSEnabled)
{
throw new IMDSDisabledException();
}
// if we are given a relative path, we assume the data we need exists under the
// main metadata root
var uri = relativeOrAbsolutePath.StartsWith(EC2_METADATA_SVC, StringComparison.Ordinal)
? new Uri(relativeOrAbsolutePath)
: new Uri(EC2_METADATA_ROOT + relativeOrAbsolutePath);
var content = AWSSDKUtils.DownloadStringContent(uri, TimeSpan.FromSeconds(5));
using (var stream = new StringReader(content))
{
if (slurp)
{
items.Add(stream.ReadToEnd());
}
else
{
string line;
do
{
line = stream.ReadLine();
if (line != null)
{
items.Add(line.Trim());
}
}while (line != null);
}
}
}
catch (WebException wex)
{
var response = wex.Response as HttpWebResponse;
if (response != null && response.StatusCode == HttpStatusCode.NotFound)
{
return(null);
}
if (tries <= 1)
{
Logger.GetLogger(typeof(EC2InstanceMetadata)).Error(wex, "Unable to contact EC2 Metadata service.");
return(null);
}
PauseExponentially(tries);
return(GetItems(relativeOrAbsolutePath, tries - 1, slurp));
}
catch (IMDSDisabledException)
{
// Keep this behavior identical to when HttpStatusCode.NotFound is returned.
return(null);
}
return(items);
}
private static List <string> GetItems(string relativeOrAbsolutePath, int tries, bool slurp, string token)
{
var items = new List <string>();
//For all meta-data queries we need to fetch an api token to use. In the event a
//token cannot be obtained we will fallback to not using a token.
Dictionary <string, string> headers = null;
if (token == null)
{
token = FetchApiToken(DEFAULT_RETRIES);
}
if (!string.IsNullOrEmpty(token))
{
headers = new Dictionary <string, string>();
headers.Add(HeaderKeys.XAwsEc2MetadataToken, token);
}
try
{
if (!IsIMDSEnabled)
{
throw new IMDSDisabledException();
}
// if we are given a relative path, we assume the data we need exists under the
// main metadata root
var uri = relativeOrAbsolutePath.StartsWith(EC2_METADATA_SVC, StringComparison.Ordinal)
? new Uri(relativeOrAbsolutePath)
: new Uri(EC2_METADATA_ROOT + relativeOrAbsolutePath);
var content = AWSSDKUtils.ExecuteHttpRequest(uri, "GET", null, TimeSpan.FromSeconds(5), Proxy, headers);
using (var stream = new StringReader(content))
{
if (slurp)
{
items.Add(stream.ReadToEnd());
}
else
{
string line;
do
{
line = stream.ReadLine();
if (line != null)
{
items.Add(line.Trim());
}
}while (line != null);
}
}
}
catch (IMDSDisabledException)
{
// Keep this behavior identical to when HttpStatusCode.NotFound is returned.
return(null);
}
catch (Exception e)
{
HttpStatusCode?httpStatusCode = ExceptionUtils.DetermineHttpStatusCode(e);
if (httpStatusCode == HttpStatusCode.NotFound)
{
return(null);
}
else if (httpStatusCode == HttpStatusCode.Unauthorized)
{
ClearTokenFlag();
Logger.GetLogger(typeof(EC2InstanceMetadata)).Error(e, "EC2 Metadata service returned unauthorized for token based secure data flow.");
throw;
}
if (tries <= 1)
{
Logger.GetLogger(typeof(EC2InstanceMetadata)).Error(e, "Unable to contact EC2 Metadata service.");
return(null);
}
PauseExponentially(DEFAULT_RETRIES - tries);
return(GetItems(relativeOrAbsolutePath, tries - 1, slurp, token));
}
return(items);
}
/// <summary>
/// Returns the canonicalized resource path for the service endpoint
/// </summary>
/// <param name="endpoint">Endpoint URL for the request</param>
/// <param name="resourcePath">Resource path for the request</param>
/// <param name="detectPreEncode">If true pre URL encode path segments if necessary.
/// S3 is currently the only service that does not expect pre URL encoded segments.</param>
/// <param name="pathResources">Dictionary of key/value parameters containing the values for the ResourcePath key replacements</param>
/// <param name="marshallerVersion">The version of the marshaller that constructed the request object.</param>
/// <remarks>
/// If resourcePath begins or ends with slash, the resulting canonicalized
/// path will follow suit.
/// </remarks>
/// <returns>Canonicalized resource path for the endpoint</returns>
public static string CanonicalizeResourcePath(Uri endpoint, string resourcePath, bool detectPreEncode, IDictionary <string, string> pathResources, int marshallerVersion)
{
if (endpoint != null)
{
var path = endpoint.AbsolutePath;
if (string.IsNullOrEmpty(path) || string.Equals(path, Slash, StringComparison.Ordinal))
{
path = string.Empty;
}
if (!string.IsNullOrEmpty(resourcePath) && resourcePath.StartsWith(Slash, StringComparison.Ordinal))
{
resourcePath = resourcePath.Substring(1);
}
if (!string.IsNullOrEmpty(resourcePath))
{
path = path + Slash + resourcePath;
}
resourcePath = path;
}
if (string.IsNullOrEmpty(resourcePath))
{
return(Slash);
}
IEnumerable <string> encodedSegments;
if (marshallerVersion >= 2)
{
encodedSegments = AWSSDKUtils.SplitResourcePathIntoSegments(resourcePath, pathResources);
}
else
{
//split path at / into segments
encodedSegments = resourcePath.Split(new char[] { SlashChar }, StringSplitOptions.None);
}
var pathWasPreEncoded = false;
if (detectPreEncode)
{
if (endpoint == null)
{
throw new ArgumentNullException(nameof(endpoint), "A non-null endpoint is necessary to decide whether or not to pre URL encode.");
}
// S3 is a special case. For S3 skip the pre encode.
// For everything else URL pre encode the resource path segments.
if (!S3Uri.IsS3Uri(endpoint))
{
if (marshallerVersion >= 2)
{
encodedSegments = encodedSegments.Select(segment => UrlEncode(segment, true).Replace(Slash, EncodedSlash));
}
else
{
encodedSegments = encodedSegments.Select(segment => ProtectEncodedSlashUrlEncode(segment, true));
}
pathWasPreEncoded = true;
}
}
var canonicalizedResourcePath = string.Empty;
if (marshallerVersion >= 2)
{
canonicalizedResourcePath = AWSSDKUtils.JoinResourcePathSegments(encodedSegments, false);
}
else
{
// Encode for canonicalization
encodedSegments = encodedSegments.Select(segment => UrlEncode(segment, false));
// join the encoded segments with /
canonicalizedResourcePath = string.Join(Slash, encodedSegments.ToArray());
}
// Get the logger each time (it's cached) because we shouldn't store it in a static variable.
Logger.GetLogger(typeof(AWSSDKUtils)).DebugFormat("{0} encoded {1}{2} for canonicalization: {3}",
pathWasPreEncoded ? "Double" : "Single",
resourcePath,
endpoint == null ? "" : " with endpoint " + endpoint.AbsoluteUri,
canonicalizedResourcePath);
return(canonicalizedResourcePath);
}
internal TypeMapping(TypeMappingElement mapping)
: this(mapping.Type, mapping.TargetTable)
{
AWSSDKUtils.FillDictionary(mapping.PropertyConfigs.Items, p => p.Name, p => new PropertyConfig(p), PropertyConfigs);
}
