protected PreflightResult SendPreflight(string path)
{
try
{
if (HeadRetryCounter == 0)
{
//HTTP GET
return(SendPreflightRequest(path, System.Net.Http.HttpMethod.Get));
}
else
{
//HTTP HEAD
PreflightResult preflightResult = SendPreflightRequest(path, System.Net.Http.HttpMethod.Head);
if (preflightResult.StatusCode != 200)
{
Log.Warning(ProxyHandler.TAG, "It seems, that remote API does not support HEAD. Retry with GET ...");
preflightResult = SendPreflightRequest(path, System.Net.Http.HttpMethod.Get);
if (HeadRetryCounter != -1)
{
HeadRetryCounter--;
}
}
return(preflightResult);
}
}
catch (Exception e)
{
return(new PreflightResult(999, e.Message));
}
}
private void AddOneToOneReachabilityAssociations(JObject data, IList <KeyValuePair <PathSegment, string> > pathSegmentsRepresentingStableUriPath)
{
//extract path segment representing the queried or manipulated resource (a check whether it exists has been already done before)
PathSegment pathSegmentRepresentingQueriedOrManipulatedResource = pathSegmentsRepresentingStableUriPath[pathSegmentsRepresentingStableUriPath.Count - 1].Key;
foreach (ReachabilityPath reachabilityAssociation in ((CustomizedPathSegment)pathSegmentRepresentingQueriedOrManipulatedResource).ReachabilityPaths)
{
//filter for one-to-one reachability associations
if (reachabilityAssociation.Type == ReachabilityPathType.oneToOne)
{
//create stable URI path pointing on target
IList <KeyValuePair <PathSegment, string> > pathSegmentsToTarget = _uriModel.GetPathSegmentsByStablePathSegments(reachabilityAssociation.Target, ConvertListToDictionary(pathSegmentsRepresentingStableUriPath));
string pathToTarget = UriModel.BuildFullPath(pathSegmentsToTarget);
//send pre-flight request:
PreflightResult preflightResult = SendPreflight(pathToTarget);
if (preflightResult.StatusCode < 200 || preflightResult.StatusCode >= 300)
{
if (_hyperlinkWithDebugInformation)
{
Hyperlink hyperlink = new Hyperlink()
{
Href = pathToTarget,
Rel = pathSegmentRepresentingQueriedOrManipulatedResource.IsAncestorOf(reachabilityAssociation.Target) ? DESCENDANT_REL : ANCESTOR_REL,
Debug_statusCode = preflightResult.StatusCode,
Debug_msg = preflightResult.Message
};
this.AddObjectToLinksArray(data, hyperlink);
}
}
else
{
Hyperlink hyperlink = new Hyperlink()
{
Href = pathToTarget,
Rel = pathSegmentRepresentingQueriedOrManipulatedResource.IsAncestorOf(reachabilityAssociation.Target) ? DESCENDANT_REL : ANCESTOR_REL
};
this.AddObjectToLinksArray(data, hyperlink);
}
}
}
}
public void AddOneToManyReachabilityAssociations(JObject data, IList <KeyValuePair <PathSegment, string> > pathSegmentsRepresentingStableUriPath, int statusCode, SKotstein.Net.Http.Context.HttpMethod method, string xPathPrefix)
{
//extract path segment representing the queried or manipulated resource (a check whether it exists has been already done before)
PathSegment pathSegmentRepresentingQueriedOrManipulatedResource = pathSegmentsRepresentingStableUriPath[pathSegmentsRepresentingStableUriPath.Count - 1].Key;
foreach (ReachabilityPath reachabilityAssociation in ((CustomizedPathSegment)pathSegmentRepresentingQueriedOrManipulatedResource).ReachabilityPaths)
{
//filter for one-to-one reachability associations
if (reachabilityAssociation.Type == ReachabilityPathType.oneToMany)
{
foreach (Link link in reachabilityAssociation.Links)
{
//check whether status code matches documented status code in link
if (link.StatusCode.CompareTo(statusCode + "") == 0)
{
//check whether method matches documented method in link
switch (method)
{
case SKotstein.Net.Http.Context.HttpMethod.GET:
if (link.Operation.Method != urimodel.HttpMethod.GET)
{
continue;
}
break;
case SKotstein.Net.Http.Context.HttpMethod.PATCH:
if (link.Operation.Method != urimodel.HttpMethod.PATCH)
{
continue;
}
break;
case SKotstein.Net.Http.Context.HttpMethod.POST:
if (link.Operation.Method != urimodel.HttpMethod.POST)
{
continue;
}
break;
case SKotstein.Net.Http.Context.HttpMethod.PUT:
if (link.Operation.Method != urimodel.HttpMethod.PUT)
{
continue;
}
break;
case SKotstein.Net.Http.Context.HttpMethod.DELETE:
if (link.Operation.Method != urimodel.HttpMethod.DELETE)
{
continue;
}
break;
}
}
else
{
continue;
}
//load values
string xPath = link.XPath.Replace("$", xPathPrefix);
IEnumerable <JToken> values = data.SelectTokens(xPath);
//iterate over values
foreach (JToken value in values)
{
IDictionary <PathSegment, string> pathSegmentValues = ConvertListToDictionary(pathSegmentsRepresentingStableUriPath);
//subsitutute path parameter
IDictionary <PathParameter, string> pathParameterMapping = new Dictionary <PathParameter, string>();
pathParameterMapping.Add(link.PathParameter, (string)value);
string substitutedVariablePathSegment = link.PathParameter.PathSegment.BuildStablePathSegment(pathParameterMapping);
//add subsituted variable path segment
pathSegmentValues.Add(link.PathParameter.PathSegment, substitutedVariablePathSegment);
//create stable URI path pointing on target
IList <KeyValuePair <PathSegment, string> > pathSegmentsToTarget = _uriModel.GetPathSegmentsByStablePathSegments(reachabilityAssociation.Target, pathSegmentValues);
string pathToTarget = UriModel.BuildFullPath(pathSegmentsToTarget);
//send pre-flight request:
PreflightResult preflightResult = SendPreflight(pathToTarget);
if (preflightResult.StatusCode < 200 || preflightResult.StatusCode >= 300)
{
if (_hyperlinkWithDebugInformation)
{
Hyperlink hyperlink = new Hyperlink()
{
Href = pathToTarget,
Rel = ITEM_REL,
Debug_statusCode = preflightResult.StatusCode,
Debug_msg = preflightResult.Message
};
this.AddObjectToLinksArray(value.Parent.Parent, hyperlink);
}
}
else
{
Hyperlink hyperlink = new Hyperlink()
{
Href = pathToTarget,
Rel = ITEM_REL
};
this.AddObjectToLinksArray(value.Parent.Parent, hyperlink);
}
}
}
}
}
}
