public async Task Execute(HttpContext context)
{
RouteData routeData = context.GetRouteData();
var tasks = _appenders.Select((a, i) =>
{
// Create binder for the tempalte
var templateBinder = new TemplateBinder(
context.RequestServices.GetRequiredService <UrlEncoder>(),
context.RequestServices.GetRequiredService <ObjectPool <UriBuildingContext> >(),
_routeTemplates[i].Item2,
null);
// Transform the uri
Uri fullUri = _routeTemplates[i].Item1 ?? context.Request.GetUri();
string url = templateBinder.BindValues(new RouteValueDictionary(routeData.Values));
var ub = new UriBuilder(fullUri);
ub.Path = url;
// Make the request
return(a.GetAsync(ub.ToString(), context.RequestAborted));
});
// Wait for answer from all requests
IAppenderResult[] results = await Task.WhenAll(tasks);
// Merge reults
object result = MergeResults(results);
// Write output using formatters
var actionContext = new ActionContext {
HttpContext = context, RouteData = routeData
};
var objectResult = new OkObjectResult(result);
await objectResult.ExecuteResultAsync(actionContext);
}
public void Binding_WithEmptyAndNull_DefaultValues(
string template,
IDictionary <string, object> defaults,
IDictionary <string, object> values,
string expected)
{
// Arrange
var binder = new TemplateBinder(TemplateParser.Parse(template, _inlineConstraintResolver),
defaults);
// Act & Assert
var result = binder.GetValues(ambientValues: null, values: values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
Assert.Equal(expected, boundTemplate);
}
}
private static bool TryProcessPrefixTemplate(HttpRequest request, RoutePattern routePattern, out string path)
{
// TODO: Do you have a better way to process the prefix template?
Contract.Assert(request != null);
Contract.Assert(routePattern != null);
HttpContext httpContext = request.HttpContext;
TemplateBinderFactory factory = request.HttpContext.RequestServices.GetRequiredService <TemplateBinderFactory>();
TemplateBinder templateBinder = factory.Create(routePattern);
RouteValueDictionary ambientValues = GetAmbientValues(httpContext);
var templateValuesResult = templateBinder.GetValues(ambientValues, request.RouteValues);
if (templateValuesResult == null)
{
// We're missing one of the required values for this route.
path = default;
return(false);
}
if (!templateBinder.TryProcessConstraints(httpContext, templateValuesResult.CombinedValues, out var _, out var _))
{
path = default;
return(false);
}
path = templateBinder.BindValues(templateValuesResult.AcceptedValues);
int index = path.IndexOf("?", StringComparison.Ordinal); // remove the query string
if (index >= 0)
{
path = path.Substring(0, index);
}
return(true);
}
public void Binding_WithEmptyAndNull_DefaultValues(
string template,
RouteValueDictionary defaults,
RouteValueDictionary values,
string expected)
{
// Arrange
var binder = new TemplateBinder(BinderFactory.Create(template, defaults));
// Act & Assert
var result = binder.GetValues(ambientValues: null, values: values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
Assert.Equal(expected, boundTemplate);
}
}
private string GetLink(
RouteTemplate template,
RouteValueDictionary defaults,
RouteValueDictionary explicitValues,
RouteValueDictionary ambientValues)
{
var templateBinder = new TemplateBinder(
UrlEncoder.Default,
_uriBuildingContextPool,
template,
defaults);
var values = templateBinder.GetValues(ambientValues, explicitValues);
if (values == null)
{
// We're missing one of the required values for this route.
return(null);
}
//TODO: route constraint matching here
return(templateBinder.BindValues(values.AcceptedValues));
}
public void GetVirtualPathWithMultiSegmentWithOptionalParam(
string template,
IReadOnlyDictionary<string, object> defaults,
IDictionary<string, object> ambientValues,
IDictionary<string, object> values,
string expected)
{
// Arrange
var binder = new TemplateBinder(
TemplateParser.Parse(template),
defaults);
// Act & Assert
var result = binder.GetValues(ambientValues: ambientValues, values: values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
Assert.Equal(expected, boundTemplate);
}
}
public void Binding_WithEmptyAndNull_DefaultValues(
string template,
IReadOnlyDictionary<string, object> defaults,
IDictionary<string, object> values,
string expected)
{
// Arrange
var binder = new TemplateBinder(
TemplateParser.Parse(template),
defaults);
// Act & Assert
var result = binder.GetValues(ambientValues: null, values: values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
Assert.Equal(expected, boundTemplate);
}
}
private static void RunTest(
string template,
IReadOnlyDictionary<string, object> defaults,
IDictionary<string, object> ambientValues,
IDictionary<string, object> values,
string expected)
{
// Arrange
var binder = new TemplateBinder(TemplateParser.Parse(template), defaults);
// Act & Assert
var result = binder.GetValues(ambientValues, values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
// We want to chop off the query string and compare that using an unordered comparison
var expectedParts = new PathAndQuery(expected);
var actualParts = new PathAndQuery(boundTemplate);
Assert.Equal(expectedParts.Path, actualParts.Path);
if (expectedParts.Parameters == null)
{
Assert.Null(actualParts.Parameters);
}
else
{
Assert.Equal(expectedParts.Parameters.Count, actualParts.Parameters.Count);
foreach (var kvp in expectedParts.Parameters)
{
string value;
Assert.True(actualParts.Parameters.TryGetValue(kvp.Key, out value));
Assert.Equal(kvp.Value, value);
}
}
}
}
private VirtualPathData GenerateVirtualPath(
VirtualPathContext context,
OutboundRouteEntry entry,
TemplateBinder binder)
{
// In attribute the context includes the values that are used to select this entry - typically
// these will be the standard 'action', 'controller' and maybe 'area' tokens. However, we don't
// want to pass these to the link generation code, or else they will end up as query parameters.
//
// So, we need to exclude from here any values that are 'required link values', but aren't
// parameters in the template.
//
// Ex:
// template: api/Products/{action}
// required values: { id = "5", action = "Buy", Controller = "CoolProducts" }
//
// result: { id = "5", action = "Buy" }
var inputValues = new RouteValueDictionary();
foreach (var kvp in context.Values)
{
if (entry.RequiredLinkValues.ContainsKey(kvp.Key))
{
var parameter = entry.RouteTemplate.GetParameter(kvp.Key);
if (parameter == null)
{
continue;
}
}
inputValues.Add(kvp.Key, kvp.Value);
}
var bindingResult = binder.GetValues(context.AmbientValues, inputValues);
if (bindingResult == null)
{
// A required parameter in the template didn't get a value.
return(null);
}
var matched = RouteConstraintMatcher.Match(
entry.Constraints,
bindingResult.CombinedValues,
context.HttpContext,
this,
RouteDirection.UrlGeneration,
_constraintLogger);
if (!matched)
{
// A constraint rejected this link.
return(null);
}
var pathData = entry.Handler.GetVirtualPath(context);
if (pathData != null)
{
// If path is non-null then the target router short-circuited, we don't expect this
// in typical MVC scenarios.
return(pathData);
}
var path = binder.BindValues(bindingResult.AcceptedValues);
if (path == null)
{
return(null);
}
return(new VirtualPathData(this, path));
}
private static void RunTest(
string template,
RouteValueDictionary defaults,
RouteValueDictionary ambientValues,
RouteValueDictionary values,
string expected)
{
// Arrange
var binder = new TemplateBinder(
UrlEncoder.Default,
new DefaultObjectPoolProvider().Create(new UriBuilderContextPooledObjectPolicy()),
TemplateParser.Parse(template),
defaults);
// Act & Assert
var result = binder.GetValues(ambientValues, values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
// We want to chop off the query string and compare that using an unordered comparison
var expectedParts = new PathAndQuery(expected);
var actualParts = new PathAndQuery(boundTemplate);
Assert.Equal(expectedParts.Path, actualParts.Path);
if (expectedParts.Parameters == null)
{
Assert.Null(actualParts.Parameters);
}
else
{
Assert.Equal(expectedParts.Parameters.Count, actualParts.Parameters.Count);
foreach (var kvp in expectedParts.Parameters)
{
string value;
Assert.True(actualParts.Parameters.TryGetValue(kvp.Key, out value));
Assert.Equal(kvp.Value, value);
}
}
}
}
public void GetVirtualPathWithMultiSegmentWithOptionalParam(
string template,
RouteValueDictionary defaults,
RouteValueDictionary ambientValues,
RouteValueDictionary values,
string expected)
{
// Arrange
var encoder = new UrlTestEncoder();
var binder = new TemplateBinder(
encoder,
new DefaultObjectPoolProvider().Create(new UriBuilderContextPooledObjectPolicy(encoder)),
TemplateParser.Parse(template),
defaults);
// Act & Assert
var result = binder.GetValues(ambientValues: ambientValues, values: values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
Assert.Equal(expected, boundTemplate);
}
}
private static void RunTest(
string template,
RouteValueDictionary defaults,
RouteValueDictionary ambientValues,
RouteValueDictionary values,
string expected,
UrlEncoder encoder = null)
{
// Arrange
encoder = encoder ?? new UrlTestEncoder();
var binder = new TemplateBinder(
encoder,
new DefaultObjectPoolProvider().Create(new UriBuilderContextPooledObjectPolicy(encoder)),
TemplateParser.Parse(template),
defaults);
// Act & Assert
var result = binder.GetValues(ambientValues, values);
if (result == null)
{
if (expected == null)
{
return;
}
else
{
Assert.NotNull(result);
}
}
var boundTemplate = binder.BindValues(result.AcceptedValues);
if (expected == null)
{
Assert.Null(boundTemplate);
}
else
{
Assert.NotNull(boundTemplate);
// We want to chop off the query string and compare that using an unordered comparison
var expectedParts = new PathAndQuery(expected);
var actualParts = new PathAndQuery(boundTemplate);
Assert.Equal(expectedParts.Path, actualParts.Path);
if (expectedParts.Parameters == null)
{
Assert.Null(actualParts.Parameters);
}
else
{
Assert.Equal(expectedParts.Parameters.Count, actualParts.Parameters.Count);
foreach (var kvp in expectedParts.Parameters)
{
string value;
Assert.True(actualParts.Parameters.TryGetValue(kvp.Key, out value));
Assert.Equal(kvp.Value, value);
}
}
}
}