/// <summary>
/// Add an item to a specific place in the pipeline.
/// </summary>
/// <param name="index">Index to add at</param>
/// <param name="item">Item to add</param>
/// <param name="replaceInPlace">
/// Whether to replace an existing item with the same name in its current place,
/// rather than at the position requested. Defaults to false.
/// </param>
public virtual void InsertItemAtPipelineIndex(int index, PipelineItem <TAsyncDelegate> item, bool replaceInPlace = false)
{
var existingIndex = this.RemoveByName(item.Name);
var newIndex = (replaceInPlace && existingIndex != -1) ? existingIndex : index;
this.pipelineItems.Insert(newIndex, item);
}
/// <summary>
/// Perform any initialisation tasks
/// </summary>
public void Initialize(IApplicationPipelines pipelines)
{
var item = new PipelineItem <Func <NancyContext, Response> >("Static content", ctx =>
{
return(conventions
.Select(convention => convention.Invoke(ctx, rootPathProvider.GetRootPath()))
.FirstOrDefault(response => response != null));
});
pipelines.BeforeRequest.AddItemToStartOfPipeline(item);
}
/// <summary>
/// Insert an item before a named item.
/// If the named item does not exist the item is inserted at the start of the pipeline.
/// </summary>
/// <param name="name">Name of the item to insert before</param>
/// <param name="item">Item to insert</param>
public virtual void InsertBefore(string name, PipelineItem <TAsyncDelegate> item)
{
var existingIndex =
this.pipelineItems.FindIndex(i => string.Equals(name, i.Name, StringComparison.Ordinal));
if (existingIndex == -1)
{
existingIndex = 0;
}
this.InsertItemAtPipelineIndex(existingIndex, item);
}
/// <summary>
/// Add an item to the end of the pipeline
/// </summary>
/// <param name="item">Item to add</param>
/// <param name="replaceInPlace">
/// Whether to replace an existing item with the same name in its current place,
/// rather than at the position requested. Defaults to false.
/// </param>
public virtual void AddItemToEndOfPipeline(PipelineItem <TAsyncDelegate> item, bool replaceInPlace = false)
{
var existingIndex = this.RemoveByName(item.Name);
if (replaceInPlace && existingIndex != -1)
{
this.InsertItemAtPipelineIndex(existingIndex, item);
}
else
{
this.pipelineItems.Add(item);
}
}
/// <summary>
/// Insert an item after a named item.
/// If the named item does not exist the item is inserted at the end of the pipeline.
/// </summary>
/// <param name="name">Name of the item to insert after</param>
/// <param name="item">Item to insert</param>
public virtual void InsertAfter(string name, PipelineItem <TAsyncDelegate> item)
{
var existingIndex =
this.pipelineItems.FindIndex(i => string.Equals(name, i.Name, StringComparison.Ordinal));
if (existingIndex == -1)
{
existingIndex = this.pipelineItems.Count;
}
existingIndex++;
if (existingIndex > this.pipelineItems.Count)
{
this.AddItemToEndOfPipeline(item);
}
else
{
this.InsertItemAtPipelineIndex(existingIndex, item);
}
}
/// <summary>
/// Add an item to the start of the pipeline
/// </summary>
/// <param name="item">Item to add</param>
/// <param name="replaceInPlace">
/// Whether to replace an existing item with the same name in its current place,
/// rather than at the position requested. Defaults to false.
/// </param>
public virtual void AddItemToStartOfPipeline(PipelineItem <TSyncDelegate> item, bool replaceInPlace = false)
{
this.AddItemToStartOfPipeline(this.Wrap(item), replaceInPlace);
}
/// <summary>
/// Add an item to the start of the pipeline
/// </summary>
/// <param name="item">Item to add</param>
/// <param name="replaceInPlace">
/// Whether to replace an existing item with the same name in its current place,
/// rather than at the position requested. Defaults to false.
/// </param>
public virtual void AddItemToStartOfPipeline(PipelineItem <TAsyncDelegate> item, bool replaceInPlace = false)
{
this.InsertItemAtPipelineIndex(0, item, replaceInPlace);
}
/// <summary> /// Wraps a sync delegate into it's async form /// </summary> /// <param name="syncDelegate">Sync pipeline instance</param> /// <returns>Async pipeline instance</returns> protected abstract PipelineItem <TAsyncDelegate> Wrap(PipelineItem <TSyncDelegate> syncDelegate);
/// <summary>
/// Insert an item after a named item.
/// If the named item does not exist the item is inserted at the end of the pipeline.
/// </summary>
/// <param name="name">Name of the item to insert after</param>
/// <param name="item">Item to insert</param>
public virtual void InsertAfter(string name, PipelineItem <TSyncDelegate> item)
{
this.InsertAfter(name, this.Wrap(item));
}
/// <summary>
/// Add an item to a specific place in the pipeline.
/// </summary>
/// <param name="index">Index to add at</param>
/// <param name="item">Item to add</param>
/// <param name="replaceInPlace">
/// Whether to replace an existing item with the same name in its current place,
/// rather than at the position requested. Defaults to false.
/// </param>
public virtual void InsertItemAtPipelineIndex(int index, PipelineItem <TSyncDelegate> item, bool replaceInPlace = false)
{
this.InsertItemAtPipelineIndex(index, this.Wrap(item), replaceInPlace);
}
static Jsonp()
{
JsonpItem = new PipelineItem <Action <NancyContext> >("JSONP", PrepareJsonp);
}
/// <summary>
/// Wraps a sync delegate into it's async form
/// </summary>
/// <param name="pipelineItem">Sync pipeline item instance</param>
/// <returns>Async pipeline item instance</returns>
protected override PipelineItem <Func <NancyContext, CancellationToken, Task <Response> > > Wrap(PipelineItem <Func <NancyContext, Response> > pipelineItem)
{
var syncDelegate = pipelineItem.Delegate;
Func <NancyContext, CancellationToken, Task <Response> > asyncDelegate = (ctx, ct) =>
{
var tcs = new TaskCompletionSource <Response>();
try
{
var result = syncDelegate.Invoke(ctx);
tcs.SetResult(result);
}
catch (Exception e)
{
tcs.SetException(e);
}
return(tcs.Task);
};
return(new PipelineItem <Func <NancyContext, CancellationToken, Task <Response> > >(pipelineItem.Name, asyncDelegate));
}
/// <summary>
/// Wraps the specified <see cref="PipelineItem{T}"/> into its async form.
/// </summary>
/// <param name="pipelineItem">The <see cref="PipelineItem{T}"/>.</param>
/// <returns>Async <see cref="PipelineItem{T}"/> instance</returns>
protected override PipelineItem <Func <NancyContext, CancellationToken, Task <Response> > > Wrap(PipelineItem <Func <NancyContext, Response> > pipelineItem)
{
return(new PipelineItem <Func <NancyContext, CancellationToken, Task <Response> > >(pipelineItem.Name, (ctx, ct) => Task.FromResult(pipelineItem.Delegate(ctx))));
}
/// <summary>
/// Wraps a sync delegate into it's async form
/// </summary>
/// <param name="pipelineItem">Sync pipeline item instance</param>
/// <returns>Async pipeline item instance</returns>
protected override PipelineItem <Func <NancyContext, CancellationToken, Task> > Wrap(PipelineItem <Action <NancyContext> > pipelineItem)
{
var syncDelegate = pipelineItem.Delegate;
Func <NancyContext, CancellationToken, Task> asyncDelegate = (ctx, ct) =>
{
try
{
syncDelegate.Invoke(ctx);
return(completeTask);
}
catch (Exception e)
{
var tcs = new TaskCompletionSource <object>();
tcs.SetException(e);
return(tcs.Task);
}
};
return(new PipelineItem <Func <NancyContext, CancellationToken, Task> >(pipelineItem.Name, asyncDelegate));
}
/// <summary>
/// Wraps the specified <see cref="PipelineItem{T}"/> instance into its async form.
/// </summary>
/// <param name="pipelineItem">The <see cref="PipelineItem{T}"/> instance.</param>
/// <returns>Async <see cref="PipelineItem{T}"/> instance</returns>
protected override PipelineItem <Func <NancyContext, CancellationToken, Task> > Wrap(PipelineItem <Action <NancyContext> > pipelineItem)
{
return(new PipelineItem <Func <NancyContext, CancellationToken, Task> >(pipelineItem.Name, (ctx, ct) =>
{
pipelineItem.Delegate(ctx);
return TaskHelpers.CompletedTask;
}));
}
