api/error.defaults.go

@@ -42,10 +42,18 @@ var (
 	// the http request URI.
 	ErrorUnknownService = func() Error { return Error{200, "unknown service", nil} }
 
+	// ErrorUnknownMethod is set when there is no method matching the
+	// request's http method
+	ErrorUnknownMethod = func() Error { return Error{201, "unknown method", nil} }
+
 	// ErrorUncallableService is set when there the requested service's
 	// implementation (plugin file) is not found/callable
 	ErrorUncallableService = func() Error { return Error{202, "uncallable service", nil} }
 
+	// ErrorUncallableMethod is set when there the requested service's
+	// implementation does not features the requested method
+	ErrorUncallableMethod = func() Error { return Error{203, "uncallable method", nil} }
+
 	// ErrorPermission is set when there is a permission error by default
 	// the api returns a permission error when the current scope (built
 	// by middlewares) does not match the scope required in the config.

api/request.param.go

@@ -4,19 +4,19 @@ import (
 	"fmt"
 )
 
-// cerr allows you to create constant "const" error with type boxing.
-type cerr string
+// Error allows you to create constant "const" error with type boxing.
+type Error string
 
 // Error implements the error builtin interface.
-func (err cerr) Error() string {
+func (err Error) Error() string {
 	return string(err)
 }
 
 // ErrReqParamNotFound is thrown when a request parameter is not found
-const ErrReqParamNotFound = cerr("request parameter not found")
+const ErrReqParamNotFound = Error("request parameter not found")
 
 // ErrReqParamNotType is thrown when a request parameter is not asked with the right type
-const ErrReqParamNotType = cerr("request parameter does not fulfills type")
+const ErrReqParamNotType = Error("request parameter does not fulfills type")
 
 // RequestParam defines input parameters of an api request
 type RequestParam map[string]interface{}

http.go

@@ -3,6 +3,7 @@ package aicra
 import (
 	"log"
 	"net/http"
+	"strings"
 
 	"git.xdrm.io/go/aicra/api"
 	"git.xdrm.io/go/aicra/internal/reqdata"
@@ -12,96 +13,103 @@ import (
 type httpServer Server
 
 // ServeHTTP implements http.Handler and has to be called on each request
-func (server httpServer) ServeHTTP(res http.ResponseWriter, req *http.Request) {
-	defer req.Body.Close()
+func (server httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	defer r.Body.Close()
 
-	// 1. find a matching service in the config
-	service := server.config.Find(req)
-	if service == nil {
-		response := api.NewResponse(api.ErrorUnknownService())
-		response.ServeHTTP(res, req)
-		logError(response)
-		return
-	}
-
-	// 2. build input parameter receiver
-	dataset := reqdata.New(service)
-
-	// 3. extract URI data
-	err := dataset.ExtractURI(req)
-	if err != nil {
-		response := api.NewResponse(api.ErrorMissingParam())
-		response.ServeHTTP(res, req)
-		logError(response)
-		return
-	}
-
-	// 4. extract query data
-	err = dataset.ExtractQuery(req)
-	if err != nil {
-		response := api.NewResponse(api.ErrorMissingParam())
-		response.ServeHTTP(res, req)
-		logError(response)
-		return
-	}
-
-	// 5. extract form/json data
-	err = dataset.ExtractForm(req)
-	if err != nil {
-		response := api.NewResponse(api.ErrorMissingParam())
-		response.ServeHTTP(res, req)
-		logError(response)
-		return
-	}
-
-	// 6. find a matching handler
-	var foundHandler *api.Handler
-	var found bool
-
-	for _, handler := range server.handlers {
-		if handler.GetMethod() == service.Method && handler.GetPath() == service.Pattern {
-			found = true
-		}
-	}
-
-	// 7. fail if found no handler
-	if foundHandler == nil {
-		if found {
-			r := api.NewResponse()
-			r.SetError(api.ErrorUncallableService(), service.Method, service.Pattern)
-			r.ServeHTTP(res, req)
-			logError(r)
-			return
-		}
-
-		r := api.NewResponse()
-		r.SetError(api.ErrorUnknownService(), service.Method, service.Pattern)
-		r.ServeHTTP(res, req)
-		logError(r)
-		return
-	}
-
-	// 8. build api.Request from http.Request
-	apireq, err := api.NewRequest(req)
+	/* (1) create api.Request from http.Request
+	---------------------------------------------------------*/
+	request, err := api.NewRequest(r)
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	// 9. feed request with scope & parameters
-	apireq.Scope = service.Scope
-	apireq.Param = dataset.Data
+	// 2. find a matching service for this path in the config
+	serviceConf, pathIndex := server.config.Browse(request.URI)
+	if serviceConf == nil {
+		return
+	}
 
-	// 10. execute
-	response := api.NewResponse()
-	foundHandler.Handle(*apireq, response)
+	// 3. extract the service path from request URI
+	servicePath := strings.Join(request.URI[:pathIndex], "/")
+	if !strings.HasPrefix(servicePath, "/") {
+		servicePath = "/" + servicePath
+	}
 
-	// 11. apply headers
-	for key, values := range response.Headers {
-		for _, value := range values {
-			res.Header().Add(key, value)
+	// 4. find method configuration from http method */
+	var methodConf = serviceConf.Method(r.Method)
+	if methodConf == nil {
+		res := api.NewResponse(api.ErrorUnknownMethod())
+		res.ServeHTTP(w, r)
+		logError(res)
+		return
+	}
+
+	// 5. parse data from the request (uri, query, form, json)
+	data := reqdata.New(request.URI[pathIndex:], r)
+
+	/* (2) check parameters
+	---------------------------------------------------------*/
+	parameters, paramError := server.extractParameters(data, methodConf.Parameters)
+
+	// Fail if argument check failed
+	if paramError.Code != api.ErrorSuccess().Code {
+		res := api.NewResponse(paramError)
+		res.ServeHTTP(w, r)
+		logError(res)
+		return
+	}
+
+	request.Param = parameters
+
+	/* (3) search for the handler
+	---------------------------------------------------------*/
+	var foundHandler *api.Handler
+	var found bool
+
+	for _, handler := range server.handlers {
+		if handler.GetPath() == servicePath {
+			found = true
+			if handler.GetMethod() == r.Method {
+				foundHandler = handler
+			}
 		}
 	}
 
-	// 12. write to response
-	response.ServeHTTP(res, req)
+	// fail if found no handler
+	if foundHandler == nil {
+		if found {
+			res := api.NewResponse()
+			res.SetError(api.ErrorUncallableMethod(), servicePath, r.Method)
+			res.ServeHTTP(w, r)
+			logError(res)
+			return
+		}
+
+		res := api.NewResponse()
+		res.SetError(api.ErrorUncallableService(), servicePath)
+		res.ServeHTTP(w, r)
+		logError(res)
+		return
+	}
+
+	/* (4) execute handler and return response
+	---------------------------------------------------------*/
+	// 1. feed request with configuration scope
+	request.Scope = methodConf.Scope
+
+	// 2. execute
+	res := api.NewResponse()
+	foundHandler.Handle(*request, res)
+
+	// 3. apply headers
+	for key, values := range res.Headers {
+		for _, value := range values {
+			w.Header().Add(key, value)
+		}
+	}
+
+	// 4. write to response
+	res.ServeHTTP(w, r)
+	return
+
 }

internal/config/errors.go

@@ -1,54 +1,54 @@
 package config
 
-// cerr allows you to create constant "const" error with type boxing.
-type cerr string
+// Error allows you to create constant "const" error with type boxing.
+type Error string
 
 // Error implements the error builtin interface.
-func (err cerr) Error() string {
+func (err Error) Error() string {
 	return string(err)
 }
 
 // ErrRead - a problem ocurred when trying to read the configuration file
-const ErrRead = cerr("cannot read config")
+const ErrRead = Error("cannot read config")
 
 // ErrUnknownMethod - invalid http method
-const ErrUnknownMethod = cerr("unknown HTTP method")
+const ErrUnknownMethod = Error("unknown HTTP method")
 
 // ErrFormat - a invalid format has been detected
-const ErrFormat = cerr("invalid config format")
+const ErrFormat = Error("invalid config format")
 
 // ErrPatternCollision - there is a collision between 2 services' patterns (same method)
-const ErrPatternCollision = cerr("invalid config format")
+const ErrPatternCollision = Error("invalid config format")
 
 // ErrInvalidPattern - a service pattern is malformed
-const ErrInvalidPattern = cerr("must begin with a '/' and not end with")
+const ErrInvalidPattern = Error("must begin with a '/' and not end with")
 
 // ErrInvalidPatternBraceCapture - a service pattern brace capture is invalid
-const ErrInvalidPatternBraceCapture = cerr("invalid uri capturing braces")
+const ErrInvalidPatternBraceCapture = Error("invalid uri capturing braces")
 
 // ErrUnspecifiedBraceCapture - a parameter brace capture is not specified in the pattern
-const ErrUnspecifiedBraceCapture = cerr("capturing brace missing in the path")
+const ErrUnspecifiedBraceCapture = Error("capturing brace missing in the path")
 
 // ErrUndefinedBraceCapture - a parameter brace capture in the pattern is not defined in parameters
-const ErrUndefinedBraceCapture = cerr("capturing brace missing input definition")
+const ErrUndefinedBraceCapture = Error("capturing brace missing input definition")
 
 // ErrMissingDescription - a service is missing its description
-const ErrMissingDescription = cerr("missing description")
+const ErrMissingDescription = Error("missing description")
 
 // ErrIllegalOptionalURIParam - an URI parameter cannot be optional
-const ErrIllegalOptionalURIParam = cerr("URI parameter cannot be optional")
+const ErrIllegalOptionalURIParam = Error("URI parameter cannot be optional")
 
 // ErrMissingParamDesc - a parameter is missing its description
-const ErrMissingParamDesc = cerr("missing parameter description")
+const ErrMissingParamDesc = Error("missing parameter description")
 
 // ErrUnknownDataType - a parameter has an unknown datatype name
-const ErrUnknownDataType = cerr("unknown data type")
+const ErrUnknownDataType = Error("unknown data type")
 
 // ErrIllegalParamName - a parameter has an illegal name
-const ErrIllegalParamName = cerr("illegal parameter name")
+const ErrIllegalParamName = Error("illegal parameter name")
 
 // ErrMissingParamType - a parameter has an illegal type
-const ErrMissingParamType = cerr("missing parameter type")
+const ErrMissingParamType = Error("missing parameter type")
 
 // ErrParamNameConflict - a parameter has a conflict with its name/rename field
-const ErrParamNameConflict = cerr("name conflict for parameter")
+const ErrParamNameConflict = Error("name conflict for parameter")

internal/multipart/types.go

@@ -1,21 +1,21 @@
 package multipart
 
-// cerr allows you to create constant "const" error with type boxing.
-type cerr string
+// Error allows you to create constant "const" error with type boxing.
+type Error string
 
 // Error implements the error builtin interface.
-func (err cerr) Error() string {
+func (err Error) Error() string {
 	return string(err)
 }
 
 // ErrMissingDataName is set when a multipart variable/file has no name="..."
-const ErrMissingDataName = cerr("data has no name")
+const ErrMissingDataName = Error("data has no name")
 
 // ErrDataNameConflict is set when a multipart variable/file name is already used
-const ErrDataNameConflict = cerr("data name conflict")
+const ErrDataNameConflict = Error("data name conflict")
 
 // ErrNoHeader is set when a multipart variable/file has no (valid) header
-const ErrNoHeader = cerr("data has no header")
+const ErrNoHeader = Error("data has no header")
 
 // Component represents a multipart variable/file
 type Component struct {

internal/reqdata/errors.go

@@ -1,30 +1,30 @@
 package reqdata
 
-// cerr allows you to create constant "const" error with type boxing.
-type cerr string
+// Error allows you to create constant "const" error with type boxing.
+type Error string
 
 // Error implements the error builtin interface.
-func (err cerr) Error() string {
+func (err Error) Error() string {
 	return string(err)
 }
 
 // ErrUnknownType is returned when encountering an unknown type
-const ErrUnknownType = cerr("unknown type")
-
-// ErrInvalidMultipart is returned when multipart parse failed
-const ErrInvalidMultipart = cerr("invalid multipart")
-
-// ErrParseParameter is returned when a parameter fails when parsing
-const ErrParseParameter = cerr("cannot parse parameter")
+const ErrUnknownType = Error("unknown type")
 
 // ErrInvalidJSON is returned when json parse failed
-const ErrInvalidJSON = cerr("invalid json")
+const ErrInvalidJSON = Error("invalid json")
+
+// ErrInvalidRootType is returned when json is a map
+const ErrInvalidRootType = Error("invalid json root type")
+
+// ErrInvalidParamName - parameter has an invalid
+const ErrInvalidParamName = Error("invalid parameter name")
 
 // ErrMissingRequiredParam - required param is missing
-const ErrMissingRequiredParam = cerr("missing required param")
+const ErrMissingRequiredParam = Error("missing required param")
 
 // ErrInvalidType - parameter value does not satisfy its type
-const ErrInvalidType = cerr("invalid type")
+const ErrInvalidType = Error("invalid type")
 
 // ErrMissingURIParameter - missing an URI parameter
-const ErrMissingURIParameter = cerr("missing URI parameter")
+const ErrMissingURIParameter = Error("missing URI parameter")

internal/reqdata/parameter.go

@@ -0,0 +1,117 @@
+package reqdata
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+)
+
+// Parameter represents an http request parameter
+// that can be of type URL, GET, or FORM (multipart, json, urlencoded)
+type Parameter struct {
+	// whether the value has been json-parsed
+	// for optimisation purpose, parameters are only parsed
+	// if they are required by the current service
+	Parsed bool
+
+	// whether the value is a file
+	File bool
+
+	// the actual parameter value
+	Value interface{}
+}
+
+// Parse parameter (json-like) if not already done
+func (i *Parameter) Parse() error {
+
+	/* (1) Stop if already parsed or nil*/
+	if i.Parsed || i.Value == nil {
+		return nil
+	}
+
+	/* (2) Try to parse value */
+	parsed, err := parseParameter(i.Value)
+	if err != nil {
+		return err
+	}
+
+	i.Parsed = true
+	i.Value = parsed
+
+	return nil
+}
+
+// parseParameter parses http GET/POST data
+// - []string
+//		- size = 1 : return json of first element
+//		- size > 1 : return array of json elements
+// - string : return json if valid, else return raw string
+func parseParameter(data interface{}) (interface{}, error) {
+	dtype := reflect.TypeOf(data)
+	dvalue := reflect.ValueOf(data)
+
+	switch dtype.Kind() {
+
+	/* (1) []string -> recursive */
+	case reflect.Slice:
+
+		// 1. ignore empty
+		if dvalue.Len() == 0 {
+			return data, nil
+		}
+
+		// 2. parse each element recursively
+		result := make([]interface{}, dvalue.Len())
+
+		for i, l := 0, dvalue.Len(); i < l; i++ {
+			element := dvalue.Index(i)
+
+			// ignore non-string
+			if element.Kind() != reflect.String {
+				result[i] = element.Interface()
+				continue
+			}
+
+			parsed, err := parseParameter(element.String())
+			if err != nil {
+				return data, err
+			}
+			result[i] = parsed
+		}
+		return result, nil
+
+	/* (2) string -> parse */
+	case reflect.String:
+
+		// build json wrapper
+		wrapper := fmt.Sprintf("{\"wrapped\":%s}", dvalue.String())
+
+		// try to parse as json
+		var result interface{}
+		err := json.Unmarshal([]byte(wrapper), &result)
+
+		// return if success
+		if err == nil {
+
+			mapval, ok := result.(map[string]interface{})
+			if !ok {
+				return dvalue.String(), ErrInvalidRootType
+			}
+
+			wrapped, ok := mapval["wrapped"]
+			if !ok {
+				return dvalue.String(), ErrInvalidJSON
+			}
+
+			return wrapped, nil
+		}
+
+		// else return as string
+		return dvalue.String(), nil
+
+	}
+
+	/* (3) NIL if unknown type */
+	return dvalue.Interface(), nil
+
+}

internal/reqdata/parameter_test.go

@@ -6,9 +6,21 @@ import (
 )
 
 func TestSimpleString(t *testing.T) {
-	p := parseParameter("some-string")
+	p := Parameter{Parsed: false, File: false, Value: "some-string"}
 
-	cast, canCast := p.(string)
+	err := p.Parse()
+
+	if err != nil {
+		t.Errorf("unexpected error: <%s>", err)
+		t.FailNow()
+	}
+
+	if !p.Parsed {
+		t.Errorf("expected parameter to be parsed")
+		t.FailNow()
+	}
+
+	cast, canCast := p.Value.(string)
 	if !canCast {
 		t.Errorf("expected parameter to be a string")
 		t.FailNow()
@@ -25,9 +37,19 @@ func TestSimpleFloat(t *testing.T) {
 
 	for i, tcase := range tcases {
 		t.Run("case "+string(i), func(t *testing.T) {
-			p := parseParameter(tcase)
+			p := Parameter{Parsed: false, File: false, Value: tcase}
 
-			cast, canCast := p.(float64)
+			if err := p.Parse(); err != nil {
+				t.Errorf("unexpected error: <%s>", err)
+				t.FailNow()
+			}
+
+			if !p.Parsed {
+				t.Errorf("expected parameter to be parsed")
+				t.FailNow()
+			}
+
+			cast, canCast := p.Value.(float64)
 			if !canCast {
 				t.Errorf("expected parameter to be a float64")
 				t.FailNow()
@@ -46,9 +68,19 @@ func TestSimpleBool(t *testing.T) {
 
 	for i, tcase := range tcases {
 		t.Run("case "+string(i), func(t *testing.T) {
-			p := parseParameter(tcase)
+			p := Parameter{Parsed: false, File: false, Value: tcase}
 
-			cast, canCast := p.(bool)
+			if err := p.Parse(); err != nil {
+				t.Errorf("unexpected error: <%s>", err)
+				t.FailNow()
+			}
+
+			if !p.Parsed {
+				t.Errorf("expected parameter to be parsed")
+				t.FailNow()
+			}
+
+			cast, canCast := p.Value.(bool)
 			if !canCast {
 				t.Errorf("expected parameter to be a bool")
 				t.FailNow()
@@ -63,9 +95,21 @@ func TestSimpleBool(t *testing.T) {
 }
 
 func TestJsonStringSlice(t *testing.T) {
-	p := parseParameter(`["str1", "str2"]`)
+	p := Parameter{Parsed: false, File: false, Value: `["str1", "str2"]`}
 
-	slice, canCast := p.([]interface{})
+	err := p.Parse()
+
+	if err != nil {
+		t.Errorf("unexpected error: <%s>", err)
+		t.FailNow()
+	}
+
+	if !p.Parsed {
+		t.Errorf("expected parameter to be parsed")
+		t.FailNow()
+	}
+
+	slice, canCast := p.Value.([]interface{})
 	if !canCast {
 		t.Errorf("expected parameter to be a []interface{}")
 		t.FailNow()
@@ -95,9 +139,21 @@ func TestJsonStringSlice(t *testing.T) {
 }
 
 func TestStringSlice(t *testing.T) {
-	p := parseParameter([]string{"str1", "str2"})
+	p := Parameter{Parsed: false, File: false, Value: []string{"str1", "str2"}}
 
-	slice, canCast := p.([]interface{})
+	err := p.Parse()
+
+	if err != nil {
+		t.Errorf("unexpected error: <%s>", err)
+		t.FailNow()
+	}
+
+	if !p.Parsed {
+		t.Errorf("expected parameter to be parsed")
+		t.FailNow()
+	}
+
+	slice, canCast := p.Value.([]interface{})
 	if !canCast {
 		t.Errorf("expected parameter to be a []interface{}")
 		t.FailNow()
@@ -137,9 +193,20 @@ func TestJsonPrimitiveBool(t *testing.T) {
 
 	for i, tcase := range tcases {
 		t.Run("case "+string(i), func(t *testing.T) {
-			p := parseParameter(tcase.Raw)
+			p := Parameter{Parsed: false, File: false, Value: tcase.Raw}
 
-			cast, canCast := p.(bool)
+			err := p.Parse()
+			if err != nil {
+				t.Errorf("unexpected error: <%s>", err)
+				t.FailNow()
+			}
+
+			if !p.Parsed {
+				t.Errorf("expected parameter to be parsed")
+				t.FailNow()
+			}
+
+			cast, canCast := p.Value.(bool)
 			if !canCast {
 				t.Errorf("expected parameter to be a bool")
 				t.FailNow()
@@ -174,9 +241,20 @@ func TestJsonPrimitiveFloat(t *testing.T) {
 
 	for i, tcase := range tcases {
 		t.Run("case "+string(i), func(t *testing.T) {
-			p := parseParameter(tcase.Raw)
+			p := Parameter{Parsed: false, File: false, Value: tcase.Raw}
 
-			cast, canCast := p.(float64)
+			err := p.Parse()
+			if err != nil {
+				t.Errorf("unexpected error: <%s>", err)
+				t.FailNow()
+			}
+
+			if !p.Parsed {
+				t.Errorf("expected parameter to be parsed")
+				t.FailNow()
+			}
+
+			cast, canCast := p.Value.(float64)
 			if !canCast {
 				t.Errorf("expected parameter to be a float64")
 				t.FailNow()
@@ -192,9 +270,21 @@ func TestJsonPrimitiveFloat(t *testing.T) {
 }
 
 func TestJsonBoolSlice(t *testing.T) {
-	p := parseParameter([]string{"true", "false"})
+	p := Parameter{Parsed: false, File: false, Value: []string{"true", "false"}}
 
-	slice, canCast := p.([]interface{})
+	err := p.Parse()
+
+	if err != nil {
+		t.Errorf("unexpected error: <%s>", err)
+		t.FailNow()
+	}
+
+	if !p.Parsed {
+		t.Errorf("expected parameter to be parsed")
+		t.FailNow()
+	}
+
+	slice, canCast := p.Value.([]interface{})
 	if !canCast {
 		t.Errorf("expected parameter to be a []interface{}")
 		t.FailNow()
@@ -224,9 +314,21 @@ func TestJsonBoolSlice(t *testing.T) {
 }
 
 func TestBoolSlice(t *testing.T) {
-	p := parseParameter([]bool{true, false})
+	p := Parameter{Parsed: false, File: false, Value: []bool{true, false}}
 
-	slice, canCast := p.([]interface{})
+	err := p.Parse()
+
+	if err != nil {
+		t.Errorf("unexpected error: <%s>", err)
+		t.FailNow()
+	}
+
+	if !p.Parsed {
+		t.Errorf("expected parameter to be parsed")
+		t.FailNow()
+	}
+
+	slice, canCast := p.Value.([]interface{})
 	if !canCast {
 		t.Errorf("expected parameter to be a []interface{}")
 		t.FailNow()

internal/reqdata/set.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"reflect"
 
 	"git.xdrm.io/go/aicra/internal/config"
 	"git.xdrm.io/go/aicra/internal/multipart"
@@ -27,14 +26,14 @@ type Set struct {
 	// - FORM: no prefix
 	// - URL:  '{uri_var}'
 	// - GET:  'GET@' followed by the key in GET
-	Data map[string]interface{}
+	Data map[string]*Parameter
 }
 
 // New creates a new empty store.
 func New(service *config.Service) *Set {
 	return &Set{
 		service: service,
-		Data:    make(map[string]interface{}),
+		Data:    make(map[string]*Parameter),
 	}
 }
 
@@ -54,17 +53,17 @@ func (i *Set) ExtractURI(req *http.Request) error {
 			return fmt.Errorf("%s: %w", capture.Name, ErrUnknownType)
 		}
 
-		// parse parameter
-		parsed := parseParameter(value)
-
 		// check type
-		cast, valid := capture.Ref.Validator(parsed)
+		cast, valid := capture.Ref.Validator(value)
 		if !valid {
 			return fmt.Errorf("%s: %w", capture.Name, ErrInvalidType)
 		}
 
 		// store cast value in 'Set'
-		i.Data[capture.Ref.Rename] = cast
+		i.Data[capture.Ref.Rename] = &Parameter{
+			Value: cast,
+		}
+
 	}
 
 	return nil
@@ -87,17 +86,16 @@ func (i *Set) ExtractQuery(req *http.Request) error {
 			continue
 		}
 
-		// parse parameter
-		parsed := parseParameter(value)
-
 		// check type
-		cast, valid := param.Validator(parsed)
+		cast, valid := param.Validator(value)
 		if !valid {
 			return fmt.Errorf("%s: %w", name, ErrInvalidType)
 		}
 
-		// store cast value
-		i.Data[param.Rename] = cast
+		// store value
+		i.Data[param.Rename] = &Parameter{
+			Value: cast,
+		}
 	}
 
 	return nil
@@ -169,8 +167,10 @@ func (i *Set) parseJSON(req *http.Request) error {
 			return fmt.Errorf("%s: %w", name, ErrInvalidType)
 		}
 
-		// store cast value
-		i.Data[param.Rename] = cast
+		// store value
+		i.Data[param.Rename] = &Parameter{
+			Value: cast,
+		}
 	}
 
 	return nil
@@ -197,17 +197,16 @@ func (i *Set) parseUrlencoded(req *http.Request) error {
 			continue
 		}
 
-		// parse parameter
-		parsed := parseParameter(value)
-
 		// check type
-		cast, valid := param.Validator(parsed)
+		cast, valid := param.Validator(value)
 		if !valid {
 			return fmt.Errorf("%s: %w", name, ErrInvalidType)
 		}
 
-		// store cast value
-		i.Data[param.Rename] = cast
+		// store value
+		i.Data[param.Rename] = &Parameter{
+			Value: cast,
+		}
 	}
 
 	return nil
@@ -245,79 +244,18 @@ func (i *Set) parseMultipart(req *http.Request) error {
 			continue
 		}
 
-		// parse parameter
-		parsed := parseParameter(string(component.Data))
-
 		// fail on invalid type
-		cast, valid := param.Validator(parsed)
+		cast, valid := param.Validator(string(component.Data))
 		if !valid {
 			return fmt.Errorf("%s: %w", name, ErrInvalidType)
 		}
 
-		// store cast value
-		i.Data[param.Rename] = cast
+		// store value
+		i.Data[param.Rename] = &Parameter{
+			Value: cast,
+		}
 	}
 
 	return nil
 
 }
-
-// parseParameter parses http URI/GET/POST data
-// - []string : return array of json elements
-// - string   : return json if valid, else return raw string
-func parseParameter(data interface{}) interface{} {
-	dtype := reflect.TypeOf(data)
-	dvalue := reflect.ValueOf(data)
-
-	switch dtype.Kind() {
-
-	/* (1) []string -> recursive */
-	case reflect.Slice:
-
-		// 1. ignore empty
-		if dvalue.Len() == 0 {
-			return data
-		}
-
-		// 2. parse each element recursively
-		result := make([]interface{}, dvalue.Len())
-
-		for i, l := 0, dvalue.Len(); i < l; i++ {
-			element := dvalue.Index(i)
-			result[i] = parseParameter(element.Interface())
-		}
-		return result
-
-	/* (2) string -> parse */
-	case reflect.String:
-
-		// build json wrapper
-		wrapper := fmt.Sprintf("{\"wrapped\":%s}", dvalue.String())
-
-		// try to parse as json
-		var result interface{}
-		err := json.Unmarshal([]byte(wrapper), &result)
-
-		// return if success
-		if err != nil {
-			return dvalue.String()
-		}
-
-		mapval, ok := result.(map[string]interface{})
-		if !ok {
-			return dvalue.String()
-		}
-
-		wrapped, ok := mapval["wrapped"]
-		if !ok {
-			return dvalue.String()
-		}
-
-		return wrapped
-
-	}
-
-	/* (3) NIL if unknown type */
-	return dvalue.Interface()
-
-}

internal/reqdata/set_test.go

@@ -280,7 +280,7 @@ func TestExtractQuery(t *testing.T) {
 						t.FailNow()
 					}
 
-					cast, canCast := param.([]interface{})
+					cast, canCast := param.Value.([]string)
 					if !canCast {
 						t.Errorf("should return a []string (got '%v')", cast)
 						t.FailNow()
@@ -458,9 +458,9 @@ func TestExtractFormUrlEncoded(t *testing.T) {
 						t.FailNow()
 					}
 
-					cast, canCast := param.([]interface{})
+					cast, canCast := param.Value.([]string)
 					if !canCast {
-						t.Errorf("should return a []interface{} (got '%v')", cast)
+						t.Errorf("should return a []string (got '%v')", cast)
 						t.FailNow()
 					}
 
@@ -606,8 +606,8 @@ func TestJsonParameters(t *testing.T) {
 
 					valueType := reflect.TypeOf(value)
 
-					paramValue := param
-					paramValueType := reflect.TypeOf(param)
+					paramValue := param.Value
+					paramValueType := reflect.TypeOf(param.Value)
 
 					if valueType != paramValueType {
 						t.Errorf("should be of type %v (got '%v')", valueType, paramValueType)
@@ -762,8 +762,8 @@ x
 
 					valueType := reflect.TypeOf(value)
 
-					paramValue := param
-					paramValueType := reflect.TypeOf(param)
+					paramValue := param.Value
+					paramValueType := reflect.TypeOf(param.Value)
 
 					if valueType != paramValueType {
 						t.Errorf("should be of type %v (got '%v')", valueType, paramValueType)

server.go

@@ -6,18 +6,20 @@ import (
 	"os"
 
 	"git.xdrm.io/go/aicra/api"
-	"git.xdrm.io/go/aicra/datatype"
+
 	"git.xdrm.io/go/aicra/internal/config"
+	checker "git.xdrm.io/go/aicra/typecheck"
 )
 
 // Server represents an AICRA instance featuring: type checkers, services
 type Server struct {
-	config   *config.Server
+	config   *config.Service
+	Checkers *checker.Set
 	handlers []*api.Handler
 }
 
 // New creates a framework instance from a configuration file
-func New(configPath string, dtypes ...datatype.T) (*Server, error) {
+func New(configPath string) (*Server, error) {
 	var (
 		err        error
 		configFile io.ReadCloser
@@ -26,6 +28,7 @@ func New(configPath string, dtypes ...datatype.T) (*Server, error) {
 	// 1. init instance
 	var i = &Server{
 		config:   nil,
+		Checkers: checker.New(),
 		handlers: make([]*api.Handler, 0),
 	}
 
@@ -37,16 +40,14 @@ func New(configPath string, dtypes ...datatype.T) (*Server, error) {
 	defer configFile.Close()
 
 	// 3. load configuration
-	i.config, err = config.Parse(configFile, dtypes...)
+	i.config, err = config.Parse(configFile)
 	if err != nil {
 		return nil, err
 	}
 
 	// 4. log configuration services
 	log.Printf("🔧   Reading configuration '%s'\n", configPath)
-	for _, service := range i.config.Services {
-		log.Printf("    ->\t%s\t'%s'\n", service.Method, service.Pattern)
-	}
+	logService(*i.config, "")
 
 	return i, nil
 

util.go

@@ -5,11 +5,101 @@ import (
 	"net/http"
 
 	"git.xdrm.io/go/aicra/api"
+	"git.xdrm.io/go/aicra/internal/config"
+	"git.xdrm.io/go/aicra/internal/reqdata"
 )
 
+// extractParameters extracts parameters for the request and checks
+// every single one according to configuration options
+func (s *httpServer) extractParameters(store *reqdata.Store, methodParam map[string]*config.Parameter) (map[string]interface{}, api.Error) {
+
+	// init vars
+	parameters := make(map[string]interface{})
+
+	// for each param of the config
+	for name, param := range methodParam {
+
+		// 1. extract value
+		p, isset := store.Set[name]
+
+		// 2. fail if required & missing
+		if !isset && !param.Optional {
+			apiErr := api.ErrorMissingParam()
+			apiErr.SetArguments(name)
+			return nil, apiErr
+		}
+
+		// 3. optional & missing: set default value
+		if !isset {
+			p = &reqdata.Parameter{
+				Parsed: true,
+				File:   param.Type == "FILE",
+				Value:  nil,
+			}
+			if param.Default != nil {
+				p.Value = *param.Default
+			}
+
+			// we are done
+			parameters[param.Rename] = p.Value
+			continue
+		}
+
+		// 4. parse parameter if not file
+		if !p.File {
+			p.Parse()
+		}
+
+		// 5. fail on unexpected multipart file
+		waitFile, gotFile := param.Type == "FILE", p.File
+		if gotFile && !waitFile || !gotFile && waitFile {
+			apiErr := api.ErrorInvalidParam()
+			apiErr.SetArguments(param.Rename, "FILE")
+			return nil, apiErr
+		}
+
+		// 6. ignore type check if file
+		if gotFile {
+			parameters[param.Rename] = p.Value
+			continue
+		}
+
+		// 7. check type
+		if s.Checkers.Run(param.Type, p.Value) != nil {
+			apiErr := api.ErrorInvalidParam()
+			apiErr.SetArguments(param.Rename, param.Type, p.Value)
+			return nil, apiErr
+		}
+
+		parameters[param.Rename] = p.Value
+
+	}
+
+	return parameters, api.ErrorSuccess()
+}
+
 var handledMethods = []string{http.MethodGet, http.MethodPost, http.MethodPut, http.MethodDelete}
 
 // Prints an error as HTTP response
 func logError(res *api.Response) {
 	log.Printf("[http.fail] %v\n", res)
 }
+
+// logService logs a service details
+func logService(s config.Service, path string) {
+	for _, method := range handledMethods {
+		if m := s.Method(method); m != nil {
+			if path == "" {
+				log.Printf("    ->\t%s\t'/'\n", method)
+			} else {
+				log.Printf("    ->\t%s\t'%s'\n", method, path)
+			}
+		}
+	}
+
+	if s.Children != nil {
+		for subPath, child := range s.Children {
+			logService(*child, path+"/"+subPath)
+		}
+	}
+}