feat: add support for int, float, and bool on ingress (#905)

Some `go` examples:

```go
//ftl:verb
//ftl:ingress http GET /int
func Int(ctx context.Context, req builtin.HttpRequest[int]) (builtin.HttpResponse[int], error) {
	return builtin.HttpResponse[int]{Body: req.Body}, nil
}

//ftl:verb
//ftl:ingress http GET /float
func Float(ctx context.Context, req builtin.HttpRequest[float64]) (builtin.HttpResponse[float64], error) {
	return builtin.HttpResponse[float64]{Body: req.Body}, nil
}

//ftl:verb
//ftl:ingress http GET /bool
func Bool(ctx context.Context, req builtin.HttpRequest[bool]) (builtin.HttpResponse[bool], error) {
	return builtin.HttpResponse[bool]{Body: req.Body}, nil
}
```

backend/controller/ingress/ingress.go

@@ -164,10 +164,10 @@ func validateValue(fieldType schema.Type, path path, value any, sch *schema.Sche
 
 	case *schema.Int:
 		switch value := value.(type) {
-		case float64:
+		case int64, float64:
 			typeMatches = true
 		case string:
-			if _, err := strconv.ParseFloat(value, 64); err == nil {
+			if _, err := strconv.ParseInt(value, 10, 64); err == nil {
 				typeMatches = true
 			}
 		}

backend/controller/ingress/request.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"strconv"
 	"strings"
 
 	"github.com/TBD54566975/ftl/backend/controller/dal"
@@ -101,6 +102,41 @@ func extractHTTPRequestBody(route *dal.IngressRoute, r *http.Request, dataRef *s
 		}
 		return string(bodyData), nil
 
+	case *schema.Int:
+		bodyData, err := readRequestBody(r)
+		if err != nil {
+			return nil, err
+		}
+
+		intVal, err := strconv.ParseInt(string(bodyData), 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse integer from request body: %w", err)
+		}
+		return intVal, nil
+
+	case *schema.Float:
+		bodyData, err := readRequestBody(r)
+		if err != nil {
+			return nil, err
+		}
+
+		floatVal, err := strconv.ParseFloat(string(bodyData), 64)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse float from request body: %w", err)
+		}
+		return floatVal, nil
+
+	case *schema.Bool:
+		bodyData, err := readRequestBody(r)
+		if err != nil {
+			return nil, err
+		}
+		boolVal, err := strconv.ParseBool(string(bodyData))
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse boolean from request body: %w", err)
+		}
+		return boolVal, nil
+
 	case *schema.Unit:
 		return map[string]any{}, nil
 

backend/controller/ingress/response.go

@@ -4,6 +4,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"strconv"
 
 	"github.com/TBD54566975/ftl/backend/schema"
 )
@@ -47,10 +48,31 @@ func ResponseBodyForVerb(sch *schema.Schema, verb *schema.Verb, body []byte, hea
 	case *schema.String:
 		var responseString string
 		if err := json.Unmarshal(body, &responseString); err != nil {
-			return nil, fmt.Errorf("HTTP response body is not valid string: %w", err)
+			return nil, fmt.Errorf("HTTP response body is not a valid string: %w", err)
 		}
 		return []byte(responseString), nil
 
+	case *schema.Int:
+		var responseInt int
+		if err := json.Unmarshal(body, &responseInt); err != nil {
+			return nil, fmt.Errorf("HTTP response body is not a valid int: %w", err)
+		}
+		return []byte(strconv.Itoa(responseInt)), nil
+
+	case *schema.Float:
+		var responseFloat float64
+		if err := json.Unmarshal(body, &responseFloat); err != nil {
+			return nil, fmt.Errorf("HTTP response body is not a valid float: %w", err)
+		}
+		return []byte(strconv.FormatFloat(responseFloat, 'f', -1, 64)), nil
+
+	case *schema.Bool:
+		var responseBool bool
+		if err := json.Unmarshal(body, &responseBool); err != nil {
+			return nil, fmt.Errorf("HTTP response body is not a valid bool: %w", err)
+		}
+		return []byte(strconv.FormatBool(responseBool)), nil
+
 	case *schema.Unit:
 		return []byte{}, nil
 

integration/integration_test.go

@@ -127,6 +127,22 @@ func TestHttpIngress(t *testing.T) {
 					assert.Equal(t, []string{"text/plain; charset=utf-8"}, resp.headers["Content-Type"])
 					assert.Equal(t, []byte("Hello, World!"), resp.bodyBytes)
 				}),
+
+				httpCall(rd, http.MethodGet, "/int", []byte("1234"), func(t testing.TB, resp *httpResponse) {
+					assert.Equal(t, 200, resp.status)
+					assert.Equal(t, []string{"text/plain; charset=utf-8"}, resp.headers["Content-Type"])
+					assert.Equal(t, []byte("1234"), resp.bodyBytes)
+				}),
+				httpCall(rd, http.MethodGet, "/float", []byte("1234.56789"), func(t testing.TB, resp *httpResponse) {
+					assert.Equal(t, 200, resp.status)
+					assert.Equal(t, []string{"text/plain; charset=utf-8"}, resp.headers["Content-Type"])
+					assert.Equal(t, []byte("1234.56789"), resp.bodyBytes)
+				}),
+				httpCall(rd, http.MethodGet, "/bool", []byte("true"), func(t testing.TB, resp *httpResponse) {
+					assert.Equal(t, 200, resp.status)
+					assert.Equal(t, []string{"text/plain; charset=utf-8"}, resp.headers["Content-Type"])
+					assert.Equal(t, []byte("true"), resp.bodyBytes)
+				}),
 			}},
 		}
 	})

integration/testdata/go/httpingress/echo.go

@@ -103,23 +103,35 @@ func Html(ctx context.Context, req builtin.HttpRequest[HtmlRequest]) (builtin.Ht
 //ftl:verb
 //ftl:ingress http POST /bytes
 func Bytes(ctx context.Context, req builtin.HttpRequest[[]byte]) (builtin.HttpResponse[[]byte], error) {
-	return builtin.HttpResponse[[]byte]{
-		Body: req.Body,
-	}, nil
+	return builtin.HttpResponse[[]byte]{Body: req.Body}, nil
 }
 
 //ftl:verb
 //ftl:ingress http GET /empty
 func Empty(ctx context.Context, req builtin.HttpRequest[ftl.Unit]) (builtin.HttpResponse[ftl.Unit], error) {
-	return builtin.HttpResponse[ftl.Unit]{
-		Body: ftl.Unit{},
-	}, nil
+	return builtin.HttpResponse[ftl.Unit]{Body: ftl.Unit{}}, nil
 }
 
 //ftl:verb
 //ftl:ingress http GET /string
 func String(ctx context.Context, req builtin.HttpRequest[string]) (builtin.HttpResponse[string], error) {
-	return builtin.HttpResponse[string]{
-		Body: req.Body,
-	}, nil
+	return builtin.HttpResponse[string]{Body: req.Body}, nil
+}
+
+//ftl:verb
+//ftl:ingress http GET /int
+func Int(ctx context.Context, req builtin.HttpRequest[int]) (builtin.HttpResponse[int], error) {
+	return builtin.HttpResponse[int]{Body: req.Body}, nil
+}
+
+//ftl:verb
+//ftl:ingress http GET /float
+func Float(ctx context.Context, req builtin.HttpRequest[float64]) (builtin.HttpResponse[float64], error) {
+	return builtin.HttpResponse[float64]{Body: req.Body}, nil
+}
+
+//ftl:verb
+//ftl:ingress http GET /bool
+func Bool(ctx context.Context, req builtin.HttpRequest[bool]) (builtin.HttpResponse[bool], error) {
+	return builtin.HttpResponse[bool]{Body: req.Body}, nil
 }

integration/testdata/kotlin/httpingress/Echo.kt

@@ -127,4 +127,34 @@ class Echo {
       body = req.body
     )
   }
+
+  @Verb
+  @HttpIngress(Method.GET, "/int")
+  fun int(context: Context, req: HttpRequest<Int>): HttpResponse<Int> {
+    return HttpResponse<Int>(
+      status = 200,
+      headers = mapOf("Int" to arrayListOf("Header from FTL")),
+      body = req.body
+    )
+  }
+
+  @Verb
+  @HttpIngress(Method.GET, "/float")
+  fun float(context: Context, req: HttpRequest<Double>): HttpResponse<Double> {
+    return HttpResponse<Double>(
+      status = 200,
+      headers = mapOf("Float" to arrayListOf("Header from FTL")),
+      body = req.body
+    )
+  }
+
+  @Verb
+  @HttpIngress(Method.GET, "/bool")
+  fun bool(context: Context, req: HttpRequest<Boolean>): HttpResponse<Boolean> {
+    return HttpResponse<Boolean>(
+      status = 200,
+      headers = mapOf("Bool" to arrayListOf("Header from FTL")),
+      body = req.body
+    )
+  }
 }