/// <summary>
/// Attempts to parse a name-value pair from the context's Input
/// property. This is the last function in the pipeline, so it never
/// invokes the specified next function.
/// </summary>
public static Task ParseSetting(ParseContext context, Func <Task> next)
{
const int SettingName = 0;
const int SettingValue = 1;
const int MaxSubstrings = 2;
RequiresArgument.NotNull(context, "context");
RequiresArgument.NotNull(next, "next");
var arr = context
.Input
// We only want to split on the first colon, so the maximum
//number of resulting substrings is limited to two.
.Split(new[] { ':' }, MaxSubstrings)
.Select(x => x.Trim())
.ToArray();
RequiresArgument.LengthEquals(arr, MaxSubstrings, "Settings must have a name and value. For example: MyFavoriteColor: Red");
RequiresArgument.NotNullOrWhiteSpace(arr[SettingName], "Setting name");
RequiresArgument.NotNullOrWhiteSpace(arr[SettingValue], "Setting value");
// Using reflection to find parsed setting on the context's state
// and set its value.
var field = context.State.GetType().GetRuntimeField(arr[SettingName]);
RequiresSettingExists(field, arr[SettingName]);
field.SetValue(context.State, arr[SettingValue]);
return(Task.CompletedTask);
}
/// <summary>
/// Returns true when the HttpRequest has the specified method,
/// e.g. GET, POST, etc., and path, ex: /api/students. The test is
/// case insensitive.
public static bool Matches(this HttpRequest request, string method, string path)
{
RequiresArgument.NotNullOrWhiteSpace(method, "method");
RequiresArgument.NotNullOrWhiteSpace(path, "path");
return(request.Method.ToUpperInvariant() == method.ToUpperInvariant() &&
request.Path.ToString().ToUpperInvariant() == path.ToUpperInvariant());
}
/// <summary>
/// Makes the response an OK (200) response and sets it's content.
/// </summary>
public static async Task Ok(this HttpResponse response, string content)
{
RequiresArgument.NotNullOrWhiteSpace(content, "message");
response.StatusCode = 200;
response.ContentType = "text/plain";
await response.WriteAsync(content);
}
