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| 1 | +using Amazon.Lambda.APIGatewayEvents; |
| 2 | +using System.Text; |
| 3 | +using System.Web; |
| 4 | +using static Amazon.Lambda.APIGatewayEvents.APIGatewayHttpApiV2ProxyRequest; |
| 5 | + |
| 6 | +namespace Amazon.Lambda.TestTool |
| 7 | +{ |
| 8 | + /// <summary> |
| 9 | + /// Provides extension methods to translate an <see cref="HttpContext"/> to different types of API Gateway requests. |
| 10 | + /// </summary> |
| 11 | + public static class HttpContextExtensions |
| 12 | + { |
| 13 | + private static IHttpRequestUtility _httpRequestUtility = new HttpRequestUtility(); |
| 14 | + private static IRouteConfigurationParser _routeConfigurationParser; |
| 15 | + |
| 16 | + public static void SetHttpRequestUtility(IHttpRequestUtility httpRequestUtility) |
| 17 | + { |
| 18 | + _httpRequestUtility = httpRequestUtility ?? throw new ArgumentNullException(nameof(httpRequestUtility)); |
| 19 | + } |
| 20 | + |
| 21 | + public static void SetRouteConfigurationParser(IRouteConfigurationParser routeConfigurationParser) |
| 22 | + { |
| 23 | + _routeConfigurationParser = routeConfigurationParser ?? throw new ArgumentNullException(nameof(routeConfigurationParser)); |
| 24 | + } |
| 25 | + |
| 26 | + /// <summary> |
| 27 | + /// Translates an <see cref="HttpContext"/> to an <see cref="APIGatewayHttpApiV2ProxyRequest"/>. |
| 28 | + /// </summary> |
| 29 | + /// <param name="context">The <see cref="HttpContext"/> to be translated.</param> |
| 30 | + /// <param name="resource">The API Gateway resource path.</param> |
| 31 | + /// <returns>An <see cref="APIGatewayHttpApiV2ProxyRequest"/> object representing the translated request.</returns> |
| 32 | + public static APIGatewayHttpApiV2ProxyRequest ToApiGatewayHttpV2Request( |
| 33 | + this HttpContext context, |
| 34 | + string resource) |
| 35 | + { |
| 36 | + var request = context.Request; |
| 37 | + |
| 38 | + var matchedConfig = _routeConfigurationParser.GetRouteConfig(request.Method, request.Path); |
| 39 | + var pathParameters = _routeConfigurationParser.ExtractPathParameters(matchedConfig, request.Path); |
| 40 | + |
| 41 | + var (headers, _) = _httpRequestUtility.ExtractHeaders(request.Headers); |
| 42 | + var (queryStringParameters, _) = _httpRequestUtility.ExtractQueryStringParameters(request.Query); |
| 43 | + |
| 44 | + var httpApiV2ProxyRequest = new APIGatewayHttpApiV2ProxyRequest |
| 45 | + { |
| 46 | + RouteKey = $"{request.Method} {resource}", |
| 47 | + RawPath = request.Path, |
| 48 | + RawQueryString = request.QueryString.Value, |
| 49 | + Cookies = request.Cookies.Select(c => $"{c.Key}={c.Value}").ToArray(), |
| 50 | + Headers = headers, |
| 51 | + QueryStringParameters = queryStringParameters, |
| 52 | + PathParameters = pathParameters ?? new Dictionary<string, string>(), |
| 53 | + Body = _httpRequestUtility.ReadRequestBody(request), |
| 54 | + IsBase64Encoded = false, |
| 55 | + RequestContext = new ProxyRequestContext |
| 56 | + { |
| 57 | + Http = new HttpDescription |
| 58 | + { |
| 59 | + Method = request.Method, |
| 60 | + Path = request.Path, |
| 61 | + Protocol = request.Protocol |
| 62 | + }, |
| 63 | + RouteKey = $"{request.Method} {resource}" |
| 64 | + }, |
| 65 | + Version = "2.0" |
| 66 | + }; |
| 67 | + |
| 68 | + if (_httpRequestUtility.IsBinaryContent(request.ContentType)) |
| 69 | + { |
| 70 | + httpApiV2ProxyRequest.Body = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(httpApiV2ProxyRequest.Body)); |
| 71 | + httpApiV2ProxyRequest.IsBase64Encoded = true; |
| 72 | + } |
| 73 | + |
| 74 | + return httpApiV2ProxyRequest; |
| 75 | + } |
| 76 | + |
| 77 | + /// <summary> |
| 78 | + /// Translates an <see cref="HttpContext"/> to an <see cref="APIGatewayProxyRequest"/>. |
| 79 | + /// </summary> |
| 80 | + /// <param name="context">The <see cref="HttpContext"/> to be translated.</param> |
| 81 | + /// <param name="resource">The API Gateway resource path.</param> |
| 82 | + /// <returns>An <see cref="APIGatewayProxyRequest"/> object representing the translated request.</returns> |
| 83 | + public static APIGatewayProxyRequest ToApiGatewayRequest( |
| 84 | + this HttpContext context, |
| 85 | + string resource) |
| 86 | + { |
| 87 | + var request = context.Request; |
| 88 | + |
| 89 | + var matchedConfig = _routeConfigurationParser.GetRouteConfig(request.Method, request.Path); |
| 90 | + var pathParameters = _routeConfigurationParser.ExtractPathParameters(matchedConfig, request.Path); |
| 91 | + |
| 92 | + var (headers, multiValueHeaders) = _httpRequestUtility.ExtractHeaders(request.Headers); |
| 93 | + var (queryStringParameters, multiValueQueryStringParameters) = _httpRequestUtility.ExtractQueryStringParameters(request.Query); |
| 94 | + |
| 95 | + var proxyRequest = new APIGatewayProxyRequest |
| 96 | + { |
| 97 | + Resource = resource, |
| 98 | + Path = HttpUtility.UrlEncode(request.Path), |
| 99 | + HttpMethod = request.Method, |
| 100 | + Headers = headers, |
| 101 | + MultiValueHeaders = multiValueHeaders, |
| 102 | + QueryStringParameters = queryStringParameters, |
| 103 | + MultiValueQueryStringParameters = multiValueQueryStringParameters, |
| 104 | + PathParameters = pathParameters ?? new Dictionary<string, string>(), |
| 105 | + Body = _httpRequestUtility.ReadRequestBody(request), |
| 106 | + IsBase64Encoded = false |
| 107 | + }; |
| 108 | + |
| 109 | + if (_httpRequestUtility.IsBinaryContent(request.ContentType)) |
| 110 | + { |
| 111 | + proxyRequest.Body = Convert.ToBase64String(Encoding.UTF8.GetBytes(proxyRequest.Body)); |
| 112 | + proxyRequest.IsBase64Encoded = true; |
| 113 | + } |
| 114 | + |
| 115 | + return proxyRequest; |
| 116 | + } |
| 117 | + } |
| 118 | +} |
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