add driver management + moved implementation of default driver into 'driver/plugin'

driver/plugin.go

@@ -0,0 +1,46 @@
+package driver
+
+import (
+	"fmt"
+	"git.xdrm.io/go/aicra/err"
+	"git.xdrm.io/go/aicra/response"
+	"plugin"
+	"strings"
+)
+
+// Load implements the Driver interface
+func (d *Plugin) Load(_path []string, _method string) (func(response.Arguments, *response.Response) response.Response, err.Error) {
+
+	/* (1) Build controller path */
+	path := strings.Join(_path, "-")
+	if len(path) == 0 {
+		path = fmt.Sprintf(".build/controller/ROOT.so")
+	} else {
+		path = fmt.Sprintf(".build/controller/%s.so", path)
+	}
+
+	/* (2) Format url */
+	tmp := []byte(strings.ToLower(_method))
+	tmp[0] = tmp[0] - ('a' - 'A')
+	method := string(tmp)
+
+	/* (2) Try to load plugin */
+	p, err2 := plugin.Open(path)
+	if err2 != nil {
+		return nil, err.UncallableController
+	}
+
+	/* (3) Try to extract method */
+	m, err2 := p.Lookup(method)
+	if err2 != nil {
+		return nil, err.UncallableMethod
+	}
+
+	/* (4) Check signature */
+	callable, validSignature := m.(func(response.Arguments, *response.Response) response.Response)
+	if !validSignature {
+		return nil, err.UncallableMethod
+	}
+
+	return callable, err.Success
+}

driver/types.go

@@ -0,0 +1,58 @@
+package driver
+
+import (
+	"git.xdrm.io/go/aicra/err"
+	"git.xdrm.io/go/aicra/response"
+)
+
+type Driver interface {
+	Load(_path []string, _method string) (func(response.Arguments, *response.Response) response.Response, err.Error)
+}
+
+// Generic tells the aicra instance to use the generic driver to load controller's executables
+//
+// It will call an executable with the json input into the standard input
+//    the HTTP method is send as the key _HTTP_METHOD_ (in upper case)
+// The standard output must be a json corresponding to the data
+//
+// FILE STRUCTURE
+// --------------
+// - the root (/) controller executable must be named  <WORKDIR>/controller/ROOT
+// - the a/b/c controller executable must be named <WORKDIR>/controller/a/b/c
+type Generic struct{}
+
+// Plugin tells the aicra instance to use the plugin driver to load controller's executables
+//
+// It will load go .so plugins with the following interface :
+//
+// type Plugin interface {
+//		Get(d i.Arguments, r *i.Response) i.Response
+//		Post(d i.Arguments, r *i.Response) i.Response
+//		Put(d i.Arguments, r *i.Response) i.Response
+//		Delete(d i.Arguments, r *i.Response) i.Response
+// }
+//
+// FILE STRUCTURE
+// --------------
+// - the root (/) controller executable must be named  <WORKDIR>/controller/ROOT/main.so
+// - the a/b/c controller executable must be named <WORKDIR>/controller/a/b/c/main.so
+//
+// COMPILATION
+// -----------
+// The compilation is handled with the command-line tool `aicra <WORKDIR>`
+type Plugin struct{}
+
+// FastCGI tells the aicra instance to use the fastcgi driver to load controller's executables
+//
+// Warning: PHP only
+//
+// It will use the fastcgi protocol with php at <host>:<port>
+//
+// FILE STRUCTURE
+// --------------
+// - the root (/) controller executable must be named  <WORKDIR>/controller/ROOT.php
+// - the a/b/c controller executable must be named <WORKDIR>/controller/a/b/c.php
+type FastCGI struct {
+	host string
+	port string
+}

internal/apirequest/request.go

@@ -3,11 +3,11 @@ package apirequest
 import (
 	"encoding/json"
 	"fmt"
+	"git.xdrm.io/go/aicra/driver"
 	"git.xdrm.io/go/aicra/err"
 	"git.xdrm.io/go/aicra/response"
 	"log"
 	"net/http"
-	"plugin"
 	"strings"
 	"time"
 )
@@ -94,39 +94,8 @@ func FetchFormData(req *http.Request) map[string]interface{} {
 
 // LoadController tries to load a controller from its uri
 // checks for its given method ('Get', 'Post', 'Put', or 'Delete')
-func (i *Request) LoadController(method string) (func(response.Arguments, *response.Response) response.Response, err.Error) {
+func (i *Request) LoadController(_method string, _driver driver.Driver) (func(response.Arguments, *response.Response) response.Response, err.Error) {
 
-	/* (1) Build controller path */
+	return _driver.Load(i.Path, _method)
-	path := strings.Join(i.Path, "-")
-	if len(path) == 0 {
-		path = fmt.Sprintf(".build/controller/ROOT.so")
-	} else {
-		path = fmt.Sprintf(".build/controller/%s.so", path)
-	}
-
-	/* (2) Format url */
-	tmp := []byte(strings.ToLower(method))
-	tmp[0] = tmp[0] - ('a' - 'A')
-	method = string(tmp)
-
-	/* (2) Try to load plugin */
-	p, err2 := plugin.Open(path)
-	if err2 != nil {
-		return nil, err.UncallableController
-	}
-
-	/* (3) Try to extract method */
-	m, err2 := p.Lookup(method)
-	if err2 != nil {
-		return nil, err.UncallableMethod
-	}
-
-	/* (4) Check signature */
-	callable, validSignature := m.(func(response.Arguments, *response.Response) response.Response)
-	if !validSignature {
-		return nil, err.UncallableMethod
-	}
-
-	return callable, err.Success
 
 }

internal/config/controller.go

@@ -1,4 +1,4 @@
-package controller
+package config
 
 import (
 	"encoding/json"

internal/config/method.go

@@ -1,4 +1,4 @@
-package controller
+package config
 
 import (
 	"git.xdrm.io/go/aicra/middleware"

internal/config/types.go

@@ -1,4 +1,4 @@
-package controller
+package config
 
 /* (1) Configuration
 ---------------------------------------------------------*/

server.go

@@ -1,10 +1,12 @@
 package aicra
 
 import (
+	"errors"
+	"git.xdrm.io/go/aicra/driver"
 	e "git.xdrm.io/go/aicra/err"
 	"git.xdrm.io/go/aicra/internal/apirequest"
 	"git.xdrm.io/go/aicra/internal/checker"
-	"git.xdrm.io/go/aicra/internal/controller"
+	"git.xdrm.io/go/aicra/internal/config"
 	"git.xdrm.io/go/aicra/middleware"
 	"git.xdrm.io/go/aicra/response"
 	"log"
@@ -16,22 +18,30 @@ import (
 // * its middlewares
 // * its controllers (config)
 type Server struct {
-	controller *controller.Controller // controllers
+	controller *config.Controller   // controllers
-	checker    *checker.Registry      // type checker registry
+	checker    *checker.Registry    // type checker registry
-	middleware *middleware.Registry   // middlewares
+	middleware *middleware.Registry // middlewares
+	driver     driver.Driver
 }
 
+var ErrNilDriver = errors.New("the driver is <nil>")
+
 // New creates a framework instance from a configuration file
-func New(path string) (*Server, error) {
+func New(_path string, _driver driver.Driver) (*Server, error) {
+
+	if _driver == nil {
+		return nil, ErrNilDriver
+	}
 
 	/* (1) Init instance */
 	var err error
 	var i = &Server{
 		controller: nil,
+		driver:     _driver,
 	}
 
 	/* (2) Load configuration */
-	i.controller, err = controller.Load(path)
+	i.controller, err = config.Load(_path)
 	if err != nil {
 		return nil, err
 	}
@@ -90,7 +100,7 @@ func (s *Server) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 
 	/* (5) Load controller
 	---------------------------------------------------------*/
-	controllerImplementation, callErr := apiRequest.LoadController(req.Method)
+	controllerImplementation, callErr := apiRequest.LoadController(req.Method, s.driver)
 	if callErr.Code != e.Success.Code {
 		httpError(res, callErr)
 		log.Printf("[err] %s\n", err)
@@ -126,7 +136,7 @@ func (s *Server) ServeHTTP(res http.ResponseWriter, req *http.Request) {
 
 // extractParameters extracts parameters for the request and checks
 // every single one according to configuration options
-func (s *Server) extractParameters(req *apirequest.Request, methodParam map[string]*controller.Parameter) (map[string]interface{}, e.Error) {
+func (s *Server) extractParameters(req *apirequest.Request, methodParam map[string]*config.Parameter) (map[string]interface{}, e.Error) {
 
 	// init vars
 	err := e.Success

util.go

@@ -4,13 +4,13 @@ import (
 	"encoding/json"
 	"git.xdrm.io/go/aicra/err"
 	"git.xdrm.io/go/aicra/internal/apirequest"
-	"git.xdrm.io/go/aicra/internal/controller"
+	"git.xdrm.io/go/aicra/internal/config"
 	"git.xdrm.io/go/aicra/response"
 	"log"
 	"net/http"
 )
 
-func (s *Server) matchController(req *apirequest.Request) *controller.Controller {
+func (s *Server) matchController(req *apirequest.Request) *config.Controller {
 
 	/* (1) Try to browse by URI */
 	pathi, ctl := s.controller.Browse(req.URI)