private async Task PerformSave(CargoEngine cargoEngine, IDictionary <string, object> environment, CancellationToken cancellationToken)
{
int itemsWritten = 0;
var request = ReadJsonFromRequest(environment) as JObject;
if (request != null)
{
var items = request.Properties()
.Select(x => new { id = x.Name, val = ((x.Value as JObject)?.Property("content")?.Value as JValue)?.Value as string })
.Where(x => x.id != null && x.val != null)
.ToDictionary(x => x.id, x => x.val);
if (items.Count > 0)
{
using (var ds = cargoEngine.CreateDataSource())
{
ds.SetById(items);
itemsWritten = items.Count;
}
}
}
await WriteObject(environment, new { message = $"saved {itemsWritten} items" }, cancellationToken);
}
public Task Invoke(IDictionary <string, object> environment)
{
var path = Get <string>(environment, "owin.RequestPath");
//get the cargo engine safely
CargoEngine cargoEngine = null;
try { cargoEngine = _getCargoEngine(); } catch { }
if (cargoEngine != null)
{
string cargoRoutePrefix = null;
CargoConfiguration config = null;
//get configuration safely
try
{
config = cargoEngine.Configuration;
cargoRoutePrefix = config?.CargoRoutePrefix;
}
catch { }
//if the route prefix matches handle the request
if (!string.IsNullOrEmpty(cargoRoutePrefix) &&
path.StartsWith(cargoRoutePrefix))
{
bool authorized = cargoEngine.AuthenticateRequest(environment);
string strippedPath = path.Substring(cargoRoutePrefix.Length);
var method = Get <string>(environment, "owin.RequestMethod");
var scheme = Get <string>(environment, "owin.RequestScheme");
var headers = Get <IDictionary <string, string[]> >(environment, "owin.RequestHeaders");
var pathBase = Get <string>(environment, "owin.RequestPathBase");
var queryString = Get <string>(environment, "owin.RequestQueryString");
var body = Get <Stream>(environment, "owin.RequestBody");
var protocol = Get <string>(environment, "owin.RequestProtocol");
var cancellationToken = Get <CancellationToken>(environment, "owin.CallCancelled");
switch (method)
{
case "HEAD":
case "GET":
return(HandleGetAsync(cargoEngine, environment, method == "HEAD", strippedPath, cancellationToken));
case "POST":
return(HandlePostAsync(cargoEngine, environment, strippedPath, cancellationToken));
default:
return(Return405Async(environment));
}
}
}
//if we get here the request remained unhandled
return(_next(environment));
}
private async Task PerformImport(CargoEngine cargoEngine, IDictionary <string, object> environment, CancellationToken cancellationToken)
{
var request = ReadObjectFromRequest <List <ContentItem> >(environment);
using (var ds = cargoEngine.CreateDataSource())
{
ds.Set(request);
await WriteObject(environment, new { message = "ok" }, cancellationToken);
}
}
private async Task HandlePostAsync(CargoEngine cargoEngine, IDictionary <string, object> environment, string strippedPath, CancellationToken cancellationToken)
{
if (strippedPath == "/save")
{
await PerformSave(cargoEngine, environment, cancellationToken);
}
else if (strippedPath == "/import")
{
await PerformImport(cargoEngine, environment, cancellationToken);
}
else
{
await Return404Async(environment);
}
}
private async Task HandleGetAsync(CargoEngine cargoEngine, IDictionary <string, object> environment, bool onlyHead, string strippedPath, CancellationToken cancellationToken)
{
if (strippedPath == "/js")
{
await WriteFromResource(environment, "cargo.js", "application/json", cancellationToken, TimeSpan.FromDays(10));
}
else if (strippedPath == "/css")
{
await WriteFromResource(environment, "cargo.css", "text/css", cancellationToken, TimeSpan.FromDays(10));
}
else if (strippedPath == "/export")
{
using (var ds = cargoEngine.CreateDataSource())
{
await WriteObject(environment, ds.GetAllContent(), cancellationToken);
}
}
else
{
await Return404Async(environment);
}
}
/// <summary>
/// Register the cargo API.
/// </summary>
/// <param name="app">The <see cref="IAppBuilder"/> provided by OWIN.</param>
/// <param name="cargoEngine">The <see cref="CargoEngine"/> to register the API for.</param>
public static IAppBuilder UseCargo(this IAppBuilder app, CargoEngine cargoEngine)
{
return app.Use(typeof(CargoPipeline), cargoEngine);
}
public void ConfigureCargo(IAppBuilder app)
{
_cargoEngine = new MyCargoEngine();
app.UseCargo(_cargoEngine);
}
public CargoPipeline(Func <IDictionary <string, object>, Task> next, CargoEngine cargoEngine)
: this(next, () => cargoEngine)
{
}
/// <summary>
/// Register the cargo API.
/// </summary>
/// <param name="app">The <see cref="IAppBuilder"/> provided by OWIN.</param>
/// <param name="cargoEngine">The <see cref="CargoEngine"/> to register the API for.</param>
public static IAppBuilder UseCargo(this IAppBuilder app, CargoEngine cargoEngine)
{
return(app.Use(typeof(CargoPipeline), cargoEngine));
}
