77 lines
2.6 KiB
C#
77 lines
2.6 KiB
C#
using Newtonsoft.Json;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace SimpleHttpServer;
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internal class HttpEndpointHandler {
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private static readonly DefaultAuthorizer defaultAuth = new();
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private readonly IAuthorizer _auth;
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private readonly MethodInfo _handler;
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private readonly Dictionary<string, (int pindex, Type type, int pparamIdx)> _params;
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private readonly Func<Exception, HttpResponseBuilder> _errorPageBuilder;
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public HttpEndpointHandler() {
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_auth = defaultAuth;
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}
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public HttpEndpointHandler(IAuthorizer auth) {
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}
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public virtual void Handle(HttpListenerContext ctx) {
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try {
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var (isAuth, authData) = _auth.IsAuthenticated(ctx);
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if (!isAuth) {
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throw new HttpHandlingException(401, "Authorization required!");
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}
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// collect parameters
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var invokeParams = new object?[_params.Count + 1];
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var set = new BitArray(_params.Count);
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invokeParams[0] = ctx;
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// read pparams
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// read qparams
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var qst = ctx.Request.QueryString;
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foreach (var qelem in ctx.Request.QueryString.AllKeys) {
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if (_params.ContainsKey(qelem!)) {
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var (pindex, type, isPParam) = _params[qelem!];
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if (type == typeof(string)) {
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invokeParams[pindex] = ctx.Request.QueryString[qelem!];
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set.Set(pindex - 1, true);
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} else {
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var elem = JsonConvert.DeserializeObject(ctx.Request.QueryString[qelem!]!, type);
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if (elem != null) {
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invokeParams[pindex] = elem;
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set.Set(pindex - 1, true);
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}
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}
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}
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}
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// fill with defaults
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foreach (var p in _params) {
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if (!set.Get(p.Value.pindex)) {
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invokeParams[p.Value.pindex] = p.Value.type.IsValueType ? Activator.CreateInstance(p.Value.type) : null;
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}
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}
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var builder = _handler.Invoke(null, invokeParams) as HttpResponseBuilder;
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builder!.SendResponse(ctx.Response);
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} catch (Exception e) {
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if (e is TargetInvocationException tex) {
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e = tex.InnerException!;
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}
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_errorPageBuilder(e).SendResponse(ctx.Response);
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}
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}
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}
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