/// <summary>
/// Limits the length of the URL.
/// </summary>
/// <param name="builder">The OWIN builder instance.</param>
/// <param name="options">The max url length options.</param>
/// <returns>The OWIN builder instance.</returns>
/// <exception cref="System.ArgumentNullException">builder</exception>
/// <exception cref="System.ArgumentNullException">options</exception>
public static BuildFunc MaxUrlLength(this BuildFunc builder, MaxUrlLengthOptions options)
{
builder.MustNotNull("builder");
options.MustNotNull("options");
builder(_ => MaxUrlLength(options));
return builder;
}
/// <summary>
/// Limits the length of the URL.
/// </summary>
/// <param name="builder">The IAppBuilder instance.</param>
/// <param name="options">The max url length options.</param>
/// <returns>The IAppBuilder instance.</returns>
/// <exception cref="System.ArgumentNullException">builder</exception>
public static IAppBuilder MaxUrlLength(this IAppBuilder builder, MaxUrlLengthOptions options)
{
builder.MustNotNull("builder");
options.MustNotNull("options");
builder
.UseOwin()
.MaxUrlLength(options);
return builder;
}
/// <summary>
/// Limits the length of the request content.
/// </summary>
/// <param name="options">The max request content lenght options.</param>
/// <returns>An OWIN middleware delegate.</returns>
/// <exception cref="System.ArgumentNullException">options</exception>
public static MidFunc MaxUrlLength(MaxUrlLengthOptions options)
{
options.MustNotNull("options");
return
next =>
env =>
{
var context = new OwinContext(env);
int maxUrlLength = options.MaxUrlLength;
string unescapedUri = Uri.UnescapeDataString(context.Request.Uri.AbsoluteUri);
options.Tracer.AsVerbose("Checking request url length.");
if (unescapedUri.Length > maxUrlLength)
{
options.Tracer.AsInfo(
"Url \"{0}\"(Length: {2}) exceeds allowed length of {1}. Request rejected.",
unescapedUri,
maxUrlLength,
unescapedUri.Length);
context.Response.StatusCode = 414;
context.Response.ReasonPhrase = options.LimitReachedReasonPhrase(context.Response.StatusCode);
return Task.FromResult(0);
}
options.Tracer.AsVerbose("Check passed. Request forwarded.");
return next(env);
};
}