bool DoesPolicyReferenceNamedValue(ExtractorParameters extractorParameters, IEnumerable <TemplateResource> policyResources, string propertyName, PropertyTemplateResource propertyTemplateResource)
{
// check if named value is referenced in a policy file
foreach (PolicyTemplateResource policyTemplateResource in policyResources)
{
string policyContent = PolicyTemplateUtils.GetPolicyContent(extractorParameters, policyTemplateResource);
if (policyContent.Contains(string.Concat("{{", propertyTemplateResource.Properties.displayName, "}}")) || policyContent.Contains(string.Concat("{{", propertyName, "}}")))
{
// dont need to go through all policies if the named value has already been found
return(true);
}
}
return(false);
}
/// <summary>
/// Generate the ARM assets for the backend resources
/// </summary>
/// <param name="apimname"></param>
/// <param name="resourceGroup"></param>
/// <param name="singleApiName"></param>
/// <param name="apiTemplateResources"></param>
/// <param name="propertyResources"></param>
/// <param name="policyXMLBaseUrl"></param>
/// <param name="policyXMLSasToken"></param>
/// <param name="extractBackendParameters"></param>
/// <returns>a combination of a Template and the value for the BackendSettings parameter</returns>
public async Task <Tuple <Template, Dictionary <string, BackendApiParameters> > > GenerateBackendsARMTemplateAsync(string apimname, string resourceGroup, string singleApiName, List <TemplateResource> apiTemplateResources, List <TemplateResource> propertyResources, ExtractorParameters extractorParameters)
{
Console.WriteLine("------------------------------------------");
Console.WriteLine("Extracting backends from service");
Template armTemplate = this.templateBuilder.GenerateTemplateWithApimServiceNameProperty().Build();
if (extractorParameters.ParameterizeBackend)
{
TemplateParameterProperties extractBackendParametersProperties = new TemplateParameterProperties()
{
type = "object"
};
armTemplate.Parameters.Add(ParameterNames.BackendSettings, extractBackendParametersProperties);
}
List <TemplateResource> templateResources = new List <TemplateResource>();
// isolate api and operation policy resources in the case of a single api extraction, as they may reference backends
var policyResources = apiTemplateResources.Where(resource => resource.Type == ResourceTypeConstants.APIPolicy || resource.Type == ResourceTypeConstants.APIOperationPolicy || resource.Type == ResourceTypeConstants.ProductPolicy);
var namedValueResources = propertyResources.Where(resource => resource.Type == ResourceTypeConstants.Property);
// pull all backends for service
JObject oBackends = new JObject();
var oBackendParameters = new Dictionary <string, BackendApiParameters>();
int skipNumberOfBackends = 0;
do
{
string backends = await this.GetBackendsAsync(apimname, resourceGroup, skipNumberOfBackends);
oBackends = JObject.Parse(backends);
foreach (var item in oBackends["value"])
{
string backendName = ((JValue)item["name"]).Value.ToString();
string backend = await this.GetBackendDetailsAsync(apimname, resourceGroup, backendName);
// convert returned backend to template resource class
BackendTemplateResource backendTemplateResource = backend.Deserialize <BackendTemplateResource>();
backendTemplateResource.Name = $"[concat(parameters('{ParameterNames.ApimServiceName}'), '/{backendName}')]";
backendTemplateResource.ApiVersion = GlobalConstants.ApiVersion;
bool includeBackend = false;
////only extract the backend if this is a full extraction, or in the case of a single api, if it is referenced by one of the policies
if (singleApiName == null)
{
// if the user is extracting all apis, extract all the backends
includeBackend = true;
}
else
{
// check extracted policies to see if the backend is referenced.
foreach (PolicyTemplateResource policyTemplateResource in policyResources)
{
string policyContent = PolicyTemplateUtils.GetPolicyContent(extractorParameters, policyTemplateResource);
if (this.DoesPolicyReferenceBackend(policyContent, namedValueResources, backendName, backendTemplateResource))
{
// backend was used in policy, extract it
includeBackend = true;
// dont need to go through all policies if the back end has already been found
break;
}
}
}
if (includeBackend)
{
if (extractorParameters.ParameterizeBackend)
{
var apiToken = new BackendApiParameters();
string validApiParamName = ParameterNamingHelper.GenerateValidParameterName(backendName, ParameterPrefix.Diagnostic).ToLower();
if (!string.IsNullOrEmpty(backendTemplateResource.Properties.resourceId))
{
apiToken.resourceId = backendTemplateResource.Properties.resourceId;
backendTemplateResource.Properties.resourceId = $"[parameters('{ParameterNames.BackendSettings}').{validApiParamName}.resourceId]";
}
if (!string.IsNullOrEmpty(backendTemplateResource.Properties.url))
{
apiToken.url = backendTemplateResource.Properties.url;
backendTemplateResource.Properties.url = $"[parameters('{ParameterNames.BackendSettings}').{validApiParamName}.url]";
}
if (!string.IsNullOrEmpty(backendTemplateResource.Properties.protocol))
{
apiToken.protocol = backendTemplateResource.Properties.protocol;
backendTemplateResource.Properties.protocol = $"[parameters('{ParameterNames.BackendSettings}').{validApiParamName}.protocol]";
}
oBackendParameters.Add(validApiParamName, apiToken);
}
Console.WriteLine("'{0}' Backend found", backendName);
templateResources.Add(backendTemplateResource);
}
}
skipNumberOfBackends += GlobalConstants.NumOfRecords;
}while (oBackends["nextLink"] != null);
armTemplate.Resources = templateResources.ToArray();
return(new Tuple <Template, Dictionary <string, BackendApiParameters> >(armTemplate, oBackendParameters));
}
public async Task <bool> IsNamedValueUsedInBackends(string apimname, string resourceGroup, string singleApiName, List <TemplateResource> apiTemplateResources, ExtractorParameters extractorParameters, string propertyName, string propertyDisplayName)
{
// isolate api and operation policy resources in the case of a single api extraction, as they may reference backends
var policyResources = apiTemplateResources.Where(resource => resource.Type == ResourceTypeConstants.APIPolicy || resource.Type == ResourceTypeConstants.APIOperationPolicy || resource.Type == ResourceTypeConstants.ProductPolicy);
var emptyNamedValueResources = new List <TemplateResource>();
// pull all backends for service
JObject oBackends = new JObject();
int skipNumberOfBackends = 0;
do
{
string backends = await this.GetBackendsAsync(apimname, resourceGroup, skipNumberOfBackends);
oBackends = JObject.Parse(backends);
foreach (var item in oBackends["value"])
{
var content = item.ToString();
// check if backend references the named value, credentials for example
if (content.Contains(string.Concat("{{", propertyName, "}}")) || content.Contains(string.Concat("{{", propertyDisplayName, "}}")))
{
//only true if this is a full extraction, or in the case of a single api, if it is referenced by one of the API policies
if (singleApiName == null)
{
return(true);
}
else
{
// is this backend related to the single api?
// is backend used in the extracted policies for this API
// if backend id is referenced in policy
// or a named value is referenced in policy to a backend, we have already checked the policy for named value.
// check if this backend is used by any of the policies extracted
string backendName = ((JValue)item["name"]).Value.ToString();
string backend = await this.GetBackendDetailsAsync(apimname, resourceGroup, backendName);
// convert returned backend to template resource class
BackendTemplateResource backendTemplateResource = backend.Deserialize <BackendTemplateResource>();
// we have already checked if the named value is used in a policy, we just need to confirm if the backend is referenced by this single api within the policy file
// this is why an empty named values must be passed to this method for validation
foreach (PolicyTemplateResource policyTemplateResource in policyResources)
{
string policyContent = PolicyTemplateUtils.GetPolicyContent(extractorParameters, policyTemplateResource);
if (this.DoesPolicyReferenceBackend(policyContent, emptyNamedValueResources, backendName, backendTemplateResource))
{
// dont need to go through all policies and backends if the named values has already been found
return(true);
}
}
}
}
}
skipNumberOfBackends += GlobalConstants.NumOfRecords;
}while (oBackends["nextLink"] != null);
return(false);
}
