Compare commits
No commits in common. "cc2599565959d011729077f1d4c2e7174b9b3127" and "418631e09dbe0ba69c1d245f2b5c43b7a7bd3a29" have entirely different histories.
cc25995659
...
418631e09d
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@ -107,17 +107,12 @@ func main() {
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log.Fatalf("invalid config: %s", err)
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}
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// add http middlewares (logger)
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builder.With(func(next http.Handler) http.Handler{ /* ... */ })
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// add contextual middlewares (authentication)
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builder.WithContext(func(next http.Handler) http.Handler{ /* ... */ })
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// bind handlers
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err = builder.Bind(http.MethodGet, "/user/{id}", getUserById)
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if err != nil {
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log.Fatalf("cannog bind GET /user/{id}: %s", err)
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}
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// ...
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// build your services
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handler, err := builder.Build()
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@ -266,7 +261,7 @@ type res struct{
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Output2 bool
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}
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func myHandler(ctx context.Context, r req) (*res, api.Err) {
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func myHandler(r req) (*res, api.Err) {
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err := doSomething()
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if err != nil {
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return nil, api.ErrFailure
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@ -0,0 +1,13 @@
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package api
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import "net/http"
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// Adapter to encapsulate incoming requests
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type Adapter func(http.HandlerFunc) http.HandlerFunc
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// AuthHandlerFunc is http.HandlerFunc with additional Authorization information
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type AuthHandlerFunc func(Auth, http.ResponseWriter, *http.Request)
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// AuthAdapter to encapsulate incoming request with access to api.Auth
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// to manage permissions
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type AuthAdapter func(AuthHandlerFunc) AuthHandlerFunc
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@ -21,7 +21,7 @@ type Auth struct {
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// Granted returns whether the authorization is granted
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// i.e. Auth.Active fulfills Auth.Required
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func (a *Auth) Granted() bool {
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func (a Auth) Granted() bool {
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var nothingRequired = true
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// first dimension: OR ; at least one is valid
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@ -43,7 +43,7 @@ func (a *Auth) Granted() bool {
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}
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// returns whether Auth.Active fulfills (contains) all @required roles
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func (a *Auth) fulfills(required []string) bool {
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func (a Auth) fulfills(required []string) bool {
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for _, requiredRole := range required {
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var found = false
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for _, activeRole := range a.Active {
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|
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@ -1,44 +1,17 @@
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package api
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import (
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"context"
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"net/http"
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"git.xdrm.io/go/aicra/internal/ctx"
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)
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// GetRequest extracts the current request from a context.Context
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func GetRequest(c context.Context) *http.Request {
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var (
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raw = c.Value(ctx.Request)
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cast, ok = raw.(*http.Request)
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)
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if !ok {
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return nil
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}
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return cast
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}
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// GetResponseWriter extracts the response writer from a context.Context
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func GetResponseWriter(c context.Context) http.ResponseWriter {
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var (
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raw = c.Value(ctx.Response)
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cast, ok = raw.(http.ResponseWriter)
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)
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if !ok {
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return nil
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}
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return cast
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}
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// GetAuth returns the api.Auth associated with this request from a context.Context
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func GetAuth(c context.Context) *Auth {
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var (
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raw = c.Value(ctx.Auth)
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cast, ok = raw.(*Auth)
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)
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if !ok {
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return nil
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}
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return cast
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// Ctx contains additional information for handlers
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//
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// usually input/output arguments built by aicra are sufficient
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// but the Ctx lets you manage your request from scratch if required
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//
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// If required, set api.Ctx as the first argument of your handler; if you
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// don't need it, only use standard input arguments and it will be ignored
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type Ctx struct {
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Res http.ResponseWriter
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Req *http.Request
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}
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41
builder.go
41
builder.go
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@ -5,6 +5,7 @@ import (
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"io"
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"net/http"
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"git.xdrm.io/go/aicra/api"
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"git.xdrm.io/go/aicra/datatype"
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"git.xdrm.io/go/aicra/internal/config"
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"git.xdrm.io/go/aicra/internal/dynfunc"
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@ -12,16 +13,10 @@ import (
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// Builder for an aicra server
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type Builder struct {
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// the server configuration defining available services
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conf *config.Server
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// user-defined handlers bound to services from the configuration
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handlers []*apiHandler
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// http middlewares wrapping the entire http connection (e.g. logger)
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middlewares []func(http.Handler) http.Handler
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// custom middlewares only wrapping the service handler of a request
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// they will benefit from the request's context that contains service-specific
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// information (e.g. required permisisons from the configuration)
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ctxMiddlewares []func(http.Handler) http.Handler
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adapters []api.Adapter
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authAdapters []api.AuthAdapter
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}
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// represents an api handler (method-pattern combination)
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@ -46,36 +41,26 @@ func (b *Builder) AddType(t datatype.T) error {
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return nil
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}
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// With adds an http middleware on top of the http connection
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//
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// Authentication management can only be done with the WithContext() methods as
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// the service associated with the request has not been found at this stage.
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// This stage is perfect for logging or generic request management.
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func (b *Builder) With(mw func(http.Handler) http.Handler) {
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// With adds an http adapter (middleware)
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func (b *Builder) With(adapter api.Adapter) {
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if b.conf == nil {
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b.conf = &config.Server{}
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}
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if b.middlewares == nil {
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b.middlewares = make([]func(http.Handler) http.Handler, 0)
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if b.adapters == nil {
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b.adapters = make([]api.Adapter, 0)
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}
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b.middlewares = append(b.middlewares, mw)
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b.adapters = append(b.adapters, adapter)
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}
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// WithContext adds an http middleware with the fully loaded context
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//
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// Logging or generic request management should be done with the With() method as
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// it wraps the full http connection. Middlewares added through this method only
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// wrap the user-defined service handler. The context.Context is filled with useful
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// data that can be access with api.GetRequest(), api.GetResponseWriter(),
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// api.GetAuth(), etc methods.
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func (b *Builder) WithContext(mw func(http.Handler) http.Handler) {
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// WithAuth adds an http adapter with auth capabilities (middleware)
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func (b *Builder) WithAuth(adapter api.AuthAdapter) {
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if b.conf == nil {
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b.conf = &config.Server{}
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}
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if b.ctxMiddlewares == nil {
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b.ctxMiddlewares = make([]func(http.Handler) http.Handler, 0)
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if b.authAdapters == nil {
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b.authAdapters = make([]api.AuthAdapter, 0)
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}
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b.ctxMiddlewares = append(b.ctxMiddlewares, mw)
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b.authAdapters = append(b.authAdapters, adapter)
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}
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// Setup the builder with its api definition file
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|
|
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@ -1,7 +1,6 @@
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package aicra
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import (
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"context"
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"errors"
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"net/http"
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"strings"
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@ -73,7 +72,7 @@ func TestBind(t *testing.T) {
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Config: "[]",
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HandlerMethod: "",
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HandlerPath: "",
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HandlerFn: func(context.Context) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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HandlerFn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: errUnknownService,
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BuildErr: nil,
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},
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|
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@ -109,7 +108,7 @@ func TestBind(t *testing.T) {
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]`,
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HandlerMethod: http.MethodPost,
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HandlerPath: "/path",
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HandlerFn: func(context.Context) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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HandlerFn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: errUnknownService,
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BuildErr: errMissingHandler,
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},
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|
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@ -127,7 +126,7 @@ func TestBind(t *testing.T) {
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]`,
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HandlerMethod: http.MethodGet,
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HandlerPath: "/paths",
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HandlerFn: func(context.Context) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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HandlerFn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: errUnknownService,
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BuildErr: errMissingHandler,
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},
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|
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@ -145,7 +144,7 @@ func TestBind(t *testing.T) {
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]`,
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HandlerMethod: http.MethodGet,
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HandlerPath: "/path",
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HandlerFn: func(context.Context) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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HandlerFn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: nil,
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BuildErr: nil,
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},
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|
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@ -165,7 +164,7 @@ func TestBind(t *testing.T) {
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]`,
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HandlerMethod: http.MethodGet,
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HandlerPath: "/path",
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HandlerFn: func(context.Context, struct{ Name int }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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HandlerFn: func(struct{ Name int }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: nil,
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BuildErr: nil,
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},
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|
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@ -185,7 +184,7 @@ func TestBind(t *testing.T) {
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]`,
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HandlerMethod: http.MethodGet,
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HandlerPath: "/path",
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HandlerFn: func(context.Context, struct{ Name uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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HandlerFn: func(struct{ Name uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: nil,
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BuildErr: nil,
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},
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|
|
@ -205,7 +204,7 @@ func TestBind(t *testing.T) {
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|||
]`,
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HandlerMethod: http.MethodGet,
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HandlerPath: "/path",
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HandlerFn: func(context.Context, struct{ Name string }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
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HandlerFn: func(struct{ Name string }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
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BindErr: nil,
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BuildErr: nil,
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},
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|
|
@ -225,7 +224,7 @@ func TestBind(t *testing.T) {
|
|||
]`,
|
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HandlerMethod: http.MethodGet,
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HandlerPath: "/path",
|
||||
HandlerFn: func(context.Context, struct{ Name bool }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
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HandlerFn: func(struct{ Name bool }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
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BindErr: nil,
|
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BuildErr: nil,
|
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},
|
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|
|
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116
handler.go
116
handler.go
|
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@ -1,14 +1,12 @@
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package aicra
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import (
|
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"context"
|
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"fmt"
|
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"net/http"
|
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"strings"
|
||||
|
||||
"git.xdrm.io/go/aicra/api"
|
||||
"git.xdrm.io/go/aicra/internal/config"
|
||||
"git.xdrm.io/go/aicra/internal/ctx"
|
||||
"git.xdrm.io/go/aicra/internal/reqdata"
|
||||
)
|
||||
|
||||
|
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@ -17,31 +15,30 @@ type Handler Builder
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|||
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// ServeHTTP implements http.Handler and wraps it in middlewares (adapters)
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func (s Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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var h http.Handler = http.HandlerFunc(s.resolve)
|
||||
var h = http.HandlerFunc(s.resolve)
|
||||
|
||||
for _, mw := range s.middlewares {
|
||||
h = mw(h)
|
||||
for _, adapter := range s.adapters {
|
||||
h = adapter(h)
|
||||
}
|
||||
h.ServeHTTP(w, r)
|
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h(w, r)
|
||||
}
|
||||
|
||||
// ServeHTTP implements http.Handler and wraps it in middlewares (adapters)
|
||||
func (s Handler) resolve(w http.ResponseWriter, r *http.Request) {
|
||||
// 1ind a matching service from config
|
||||
// 1. find a matching service from config
|
||||
var service = s.conf.Find(r)
|
||||
if service == nil {
|
||||
handleError(api.ErrUnknownService, w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// extract request data
|
||||
// 2. extract request data
|
||||
var input, err = extractInput(service, *r)
|
||||
if err != nil {
|
||||
handleError(api.ErrMissingParam, w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// find a matching handler
|
||||
// 3. find a matching handler
|
||||
var handler *apiHandler
|
||||
for _, h := range s.handlers {
|
||||
if h.Method == service.Method && h.Path == service.Pattern {
|
||||
|
|
@ -49,50 +46,59 @@ func (s Handler) resolve(w http.ResponseWriter, r *http.Request) {
|
|||
}
|
||||
}
|
||||
|
||||
// fail on no matching handler
|
||||
// 4. fail on no matching handler
|
||||
if handler == nil {
|
||||
handleError(api.ErrUncallableService, w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// build context with builtin data
|
||||
c := r.Context()
|
||||
c = context.WithValue(c, ctx.Request, r)
|
||||
c = context.WithValue(c, ctx.Response, w)
|
||||
c = context.WithValue(c, ctx.Auth, buildAuth(service.Scope, input.Data))
|
||||
// replace format '[a]' in scope where 'a' is an existing input's name
|
||||
scope := make([][]string, len(service.Scope))
|
||||
for a, list := range service.Scope {
|
||||
scope[a] = make([]string, len(list))
|
||||
for b, perm := range list {
|
||||
scope[a][b] = perm
|
||||
for name, value := range input.Data {
|
||||
var (
|
||||
token = fmt.Sprintf("[%s]", name)
|
||||
replacement = ""
|
||||
)
|
||||
if value != nil {
|
||||
replacement = fmt.Sprintf("[%v]", value)
|
||||
}
|
||||
scope[a][b] = strings.ReplaceAll(scope[a][b], token, replacement)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// create http handler
|
||||
var h http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
auth := api.GetAuth(r.Context())
|
||||
if auth == nil {
|
||||
var auth = api.Auth{
|
||||
Required: scope,
|
||||
Active: []string{},
|
||||
}
|
||||
|
||||
// 5. run auth-aware middlewares
|
||||
var h = api.AuthHandlerFunc(func(a api.Auth, w http.ResponseWriter, r *http.Request) {
|
||||
if !a.Granted() {
|
||||
handleError(api.ErrPermission, w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// reject non granted requests
|
||||
if !auth.Granted() {
|
||||
handleError(api.ErrPermission, w, r)
|
||||
return
|
||||
}
|
||||
|
||||
// use context defined in the request
|
||||
s.handle(r.Context(), input, handler, service, w, r)
|
||||
s.handle(input, handler, service, w, r)
|
||||
})
|
||||
|
||||
// run middlewares the handler
|
||||
for _, mw := range s.ctxMiddlewares {
|
||||
h = mw(h)
|
||||
for _, adapter := range s.authAdapters {
|
||||
h = adapter(h)
|
||||
}
|
||||
h(auth, w, r)
|
||||
|
||||
}
|
||||
|
||||
// serve using the context with values
|
||||
h.ServeHTTP(w, r.WithContext(c))
|
||||
}
|
||||
func (s *Handler) handle(input *reqdata.T, handler *apiHandler, service *config.Service, w http.ResponseWriter, r *http.Request) {
|
||||
// 5. pass execution to the handler
|
||||
ctx := api.Ctx{Res: w, Req: r}
|
||||
var outData, outErr = handler.dyn.Handle(ctx, input.Data)
|
||||
|
||||
func (s *Handler) handle(c context.Context, input *reqdata.T, handler *apiHandler, service *config.Service, w http.ResponseWriter, r *http.Request) {
|
||||
// pass execution to the handler
|
||||
var outData, outErr = handler.dyn.Handle(c, input.Data)
|
||||
|
||||
// build response from returned arguments
|
||||
// 6. build res from returned data
|
||||
var res = api.EmptyResponse().WithError(outErr)
|
||||
for key, value := range outData {
|
||||
|
||||
|
|
@ -143,35 +149,3 @@ func extractInput(service *config.Service, req http.Request) (*reqdata.T, error)
|
|||
|
||||
return dataset, nil
|
||||
}
|
||||
|
||||
// buildAuth builds the api.Auth struct from the service scope configuration
|
||||
//
|
||||
// it replaces format '[a]' in scope where 'a' is an existing input argument's
|
||||
// name with its value
|
||||
func buildAuth(scope [][]string, in map[string]interface{}) *api.Auth {
|
||||
updated := make([][]string, len(scope))
|
||||
|
||||
// replace '[arg_name]' with the 'arg_name' value if it is a known variable
|
||||
// name
|
||||
for a, list := range scope {
|
||||
updated[a] = make([]string, len(list))
|
||||
for b, perm := range list {
|
||||
updated[a][b] = perm
|
||||
for name, value := range in {
|
||||
var (
|
||||
token = fmt.Sprintf("[%s]", name)
|
||||
replacement = ""
|
||||
)
|
||||
if value != nil {
|
||||
replacement = fmt.Sprintf("[%v]", value)
|
||||
}
|
||||
updated[a][b] = strings.ReplaceAll(updated[a][b], token, replacement)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return &api.Auth{
|
||||
Required: updated,
|
||||
Active: []string{},
|
||||
}
|
||||
}
|
||||
|
|
|
|||
174
handler_test.go
174
handler_test.go
|
|
@ -3,7 +3,6 @@ package aicra_test
|
|||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"net/http"
|
||||
"net/http/httptest"
|
||||
|
|
@ -49,15 +48,15 @@ func TestWith(t *testing.T) {
|
|||
type ckey int
|
||||
const key ckey = 0
|
||||
|
||||
middleware := func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
middleware := func(next http.HandlerFunc) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
newr := r
|
||||
|
||||
// first time -> store 1
|
||||
value := r.Context().Value(key)
|
||||
if value == nil {
|
||||
newr = r.WithContext(context.WithValue(r.Context(), key, int(1)))
|
||||
next.ServeHTTP(w, newr)
|
||||
next(w, newr)
|
||||
return
|
||||
}
|
||||
|
||||
|
|
@ -68,8 +67,8 @@ func TestWith(t *testing.T) {
|
|||
}
|
||||
cast++
|
||||
newr = r.WithContext(context.WithValue(r.Context(), key, cast))
|
||||
next.ServeHTTP(w, newr)
|
||||
})
|
||||
next(w, newr)
|
||||
}
|
||||
}
|
||||
|
||||
// add middleware @n times
|
||||
|
|
@ -83,9 +82,9 @@ func TestWith(t *testing.T) {
|
|||
t.Fatalf("setup: unexpected error <%v>", err)
|
||||
}
|
||||
|
||||
pathHandler := func(ctx context.Context) (*struct{}, api.Err) {
|
||||
pathHandler := func(ctx api.Ctx) (*struct{}, api.Err) {
|
||||
// write value from middlewares into response
|
||||
value := ctx.Value(key)
|
||||
value := ctx.Req.Context().Value(key)
|
||||
if value == nil {
|
||||
t.Fatalf("nothing found in context")
|
||||
}
|
||||
|
|
@ -94,7 +93,7 @@ func TestWith(t *testing.T) {
|
|||
t.Fatalf("cannot cast context data to int")
|
||||
}
|
||||
// write to response
|
||||
api.GetResponseWriter(ctx).Write([]byte(fmt.Sprintf("#%d#", cast)))
|
||||
ctx.Res.Write([]byte(fmt.Sprintf("#%d#", cast)))
|
||||
|
||||
return nil, api.ErrSuccess
|
||||
}
|
||||
|
|
@ -213,13 +212,8 @@ func TestWithAuth(t *testing.T) {
|
|||
}
|
||||
|
||||
// tester middleware (last executed)
|
||||
builder.WithContext(func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
a := api.GetAuth(r.Context())
|
||||
if a == nil {
|
||||
t.Fatalf("cannot access api.Auth form request context")
|
||||
}
|
||||
|
||||
builder.WithAuth(func(next api.AuthHandlerFunc) api.AuthHandlerFunc {
|
||||
return func(a api.Auth, w http.ResponseWriter, r *http.Request) {
|
||||
if a.Granted() == tc.granted {
|
||||
return
|
||||
}
|
||||
|
|
@ -228,20 +222,14 @@ func TestWithAuth(t *testing.T) {
|
|||
} else {
|
||||
t.Fatalf("expected granted auth")
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
})
|
||||
|
||||
builder.WithContext(func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
a := api.GetAuth(r.Context())
|
||||
if a == nil {
|
||||
t.Fatalf("cannot access api.Auth form request context")
|
||||
}
|
||||
|
||||
a.Active = tc.permissions
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
|
||||
builder.WithAuth(func(next api.AuthHandlerFunc) api.AuthHandlerFunc {
|
||||
return func(a api.Auth, w http.ResponseWriter, r *http.Request) {
|
||||
a.Active = tc.permissions
|
||||
next(a, w, r)
|
||||
}
|
||||
})
|
||||
|
||||
err := builder.Setup(strings.NewReader(tc.manifest))
|
||||
|
|
@ -249,7 +237,7 @@ func TestWithAuth(t *testing.T) {
|
|||
t.Fatalf("setup: unexpected error <%v>", err)
|
||||
}
|
||||
|
||||
pathHandler := func(ctx context.Context) (*struct{}, api.Err) {
|
||||
pathHandler := func(ctx api.Ctx) (*struct{}, api.Err) {
|
||||
return nil, api.ErrNotImplemented
|
||||
}
|
||||
|
||||
|
|
@ -276,97 +264,6 @@ func TestWithAuth(t *testing.T) {
|
|||
|
||||
}
|
||||
|
||||
func TestPermissionError(t *testing.T) {
|
||||
|
||||
tt := []struct {
|
||||
name string
|
||||
manifest string
|
||||
permissions []string
|
||||
granted bool
|
||||
}{
|
||||
{
|
||||
name: "permission fulfilled",
|
||||
manifest: `[ { "method": "GET", "path": "/path", "scope": [["A"]], "info": "info", "in": {}, "out": {} } ]`,
|
||||
permissions: []string{"A"},
|
||||
granted: true,
|
||||
},
|
||||
{
|
||||
name: "missing permission",
|
||||
manifest: `[ { "method": "GET", "path": "/path", "scope": [["A"]], "info": "info", "in": {}, "out": {} } ]`,
|
||||
permissions: []string{},
|
||||
granted: false,
|
||||
},
|
||||
}
|
||||
|
||||
for _, tc := range tt {
|
||||
t.Run(tc.name, func(t *testing.T) {
|
||||
builder := &aicra.Builder{}
|
||||
if err := addBuiltinTypes(builder); err != nil {
|
||||
t.Fatalf("unexpected error <%v>", err)
|
||||
}
|
||||
|
||||
// add active permissions
|
||||
builder.WithContext(func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
a := api.GetAuth(r.Context())
|
||||
if a == nil {
|
||||
t.Fatalf("cannot access api.Auth form request context")
|
||||
}
|
||||
|
||||
a.Active = tc.permissions
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
})
|
||||
|
||||
err := builder.Setup(strings.NewReader(tc.manifest))
|
||||
if err != nil {
|
||||
t.Fatalf("setup: unexpected error <%v>", err)
|
||||
}
|
||||
|
||||
pathHandler := func(ctx context.Context) (*struct{}, api.Err) {
|
||||
return nil, api.ErrNotImplemented
|
||||
}
|
||||
|
||||
if err := builder.Bind(http.MethodGet, "/path", pathHandler); err != nil {
|
||||
t.Fatalf("bind: unexpected error <%v>", err)
|
||||
}
|
||||
|
||||
handler, err := builder.Build()
|
||||
if err != nil {
|
||||
t.Fatalf("build: unexpected error <%v>", err)
|
||||
}
|
||||
|
||||
response := httptest.NewRecorder()
|
||||
request := httptest.NewRequest(http.MethodGet, "/path", &bytes.Buffer{})
|
||||
|
||||
// test request
|
||||
handler.ServeHTTP(response, request)
|
||||
if response.Body == nil {
|
||||
t.Fatalf("response has no body")
|
||||
}
|
||||
type jsonResponse struct {
|
||||
Err api.Err `json:"error"`
|
||||
}
|
||||
var res jsonResponse
|
||||
err = json.Unmarshal(response.Body.Bytes(), &res)
|
||||
if err != nil {
|
||||
t.Fatalf("cannot unmarshal response: %s", err)
|
||||
}
|
||||
|
||||
expectedError := api.ErrNotImplemented
|
||||
if !tc.granted {
|
||||
expectedError = api.ErrPermission
|
||||
}
|
||||
|
||||
if res.Err.Code != expectedError.Code {
|
||||
t.Fatalf("expected error code %d got %d", expectedError.Code, res.Err.Code)
|
||||
}
|
||||
|
||||
})
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
func TestDynamicScope(t *testing.T) {
|
||||
tt := []struct {
|
||||
name string
|
||||
|
|
@ -393,7 +290,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/path/{id}",
|
||||
handler: func(context.Context, struct{ Input1 uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
handler: func(struct{ Input1 uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
url: "/path/123",
|
||||
body: ``,
|
||||
permissions: []string{"user[123]"},
|
||||
|
|
@ -414,7 +311,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/path/{id}",
|
||||
handler: func(context.Context, struct{ Input1 uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
handler: func(struct{ Input1 uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
url: "/path/666",
|
||||
body: ``,
|
||||
permissions: []string{"user[123]"},
|
||||
|
|
@ -435,7 +332,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/path/{id}",
|
||||
handler: func(context.Context, struct{ User uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
handler: func(struct{ User uint }) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
url: "/path/123",
|
||||
body: ``,
|
||||
permissions: []string{"prefix.user[123].suffix"},
|
||||
|
|
@ -457,7 +354,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/prefix/{pid}/user/{uid}",
|
||||
handler: func(context.Context, struct {
|
||||
handler: func(struct {
|
||||
Prefix uint
|
||||
User uint
|
||||
}) (*struct{}, api.Err) {
|
||||
|
|
@ -484,7 +381,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/prefix/{pid}/user/{uid}",
|
||||
handler: func(context.Context, struct {
|
||||
handler: func(struct {
|
||||
Prefix uint
|
||||
User uint
|
||||
}) (*struct{}, api.Err) {
|
||||
|
|
@ -512,7 +409,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/prefix/{pid}/user/{uid}/suffix/{sid}",
|
||||
handler: func(context.Context, struct {
|
||||
handler: func(struct {
|
||||
Prefix uint
|
||||
User uint
|
||||
Suffix uint
|
||||
|
|
@ -541,7 +438,7 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
]`,
|
||||
path: "/prefix/{pid}/user/{uid}/suffix/{sid}",
|
||||
handler: func(context.Context, struct {
|
||||
handler: func(struct {
|
||||
Prefix uint
|
||||
User uint
|
||||
Suffix uint
|
||||
|
|
@ -563,12 +460,8 @@ func TestDynamicScope(t *testing.T) {
|
|||
}
|
||||
|
||||
// tester middleware (last executed)
|
||||
builder.WithContext(func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
a := api.GetAuth(r.Context())
|
||||
if a == nil {
|
||||
t.Fatalf("cannot access api.Auth form request context")
|
||||
}
|
||||
builder.WithAuth(func(next api.AuthHandlerFunc) api.AuthHandlerFunc {
|
||||
return func(a api.Auth, w http.ResponseWriter, r *http.Request) {
|
||||
if a.Granted() == tc.granted {
|
||||
return
|
||||
}
|
||||
|
|
@ -577,20 +470,15 @@ func TestDynamicScope(t *testing.T) {
|
|||
} else {
|
||||
t.Fatalf("expected granted auth")
|
||||
}
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
}
|
||||
})
|
||||
|
||||
// update permissions
|
||||
builder.WithContext(func(next http.Handler) http.Handler {
|
||||
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
a := api.GetAuth(r.Context())
|
||||
if a == nil {
|
||||
t.Fatalf("cannot access api.Auth form request context")
|
||||
}
|
||||
builder.WithAuth(func(next api.AuthHandlerFunc) api.AuthHandlerFunc {
|
||||
return func(a api.Auth, w http.ResponseWriter, r *http.Request) {
|
||||
a.Active = tc.permissions
|
||||
next.ServeHTTP(w, r)
|
||||
})
|
||||
next(a, w, r)
|
||||
}
|
||||
})
|
||||
|
||||
err := builder.Setup(strings.NewReader(tc.manifest))
|
||||
|
|
|
|||
|
|
@ -1,13 +0,0 @@
|
|||
package ctx
|
||||
|
||||
// Key defines a custom context key type
|
||||
type Key int
|
||||
|
||||
const (
|
||||
// Request is the key for the current *http.Request
|
||||
Request Key = iota
|
||||
// Response is the key for the associated http.ResponseWriter
|
||||
Response
|
||||
// Auth is the key for the request's authentication information
|
||||
Auth
|
||||
)
|
||||
|
|
@ -14,19 +14,16 @@ const errHandlerNotFunc = cerr("handler must be a func")
|
|||
const errNoServiceForHandler = cerr("no service found for this handler")
|
||||
|
||||
// errMissingHandlerArgumentParam - missing params arguments for handler
|
||||
const errMissingHandlerContextArgument = cerr("missing handler first argument of type context.Context")
|
||||
|
||||
// errMissingHandlerInputArgument - missing params arguments for handler
|
||||
const errMissingHandlerInputArgument = cerr("missing handler argument: input struct")
|
||||
const errMissingHandlerArgumentParam = cerr("missing handler argument : parameter struct")
|
||||
|
||||
// errUnexpectedInput - input argument is not expected
|
||||
const errUnexpectedInput = cerr("unexpected input struct")
|
||||
|
||||
// errMissingHandlerOutputArgument - missing output for handler
|
||||
const errMissingHandlerOutputArgument = cerr("missing handler first output argument: output struct")
|
||||
// errMissingHandlerOutput - missing output for handler
|
||||
const errMissingHandlerOutput = cerr("handler must have at least 1 output")
|
||||
|
||||
// errMissingHandlerOutputError - missing error output for handler
|
||||
const errMissingHandlerOutputError = cerr("missing handler last output argument of type api.Err")
|
||||
const errMissingHandlerOutputError = cerr("handler must have its last output of type api.Err")
|
||||
|
||||
// errMissingRequestArgument - missing request argument for handler
|
||||
const errMissingRequestArgument = cerr("handler first argument must be of type api.Request")
|
||||
|
|
@ -37,14 +34,17 @@ const errMissingParamArgument = cerr("handler second argument must be a struct")
|
|||
// errUnexportedName - argument is unexported in struct
|
||||
const errUnexportedName = cerr("unexported name")
|
||||
|
||||
// errWrongOutputArgumentType - wrong type for output first argument
|
||||
const errWrongOutputArgumentType = cerr("handler first output argument must be a *struct")
|
||||
// errMissingParamOutput - missing output argument for handler
|
||||
const errMissingParamOutput = cerr("handler first output must be a *struct")
|
||||
|
||||
// errMissingConfigArgument - missing an input/output argument in handler struct
|
||||
const errMissingConfigArgument = cerr("missing an argument from the configuration")
|
||||
// errMissingParamFromConfig - missing a parameter in handler struct
|
||||
const errMissingParamFromConfig = cerr("missing a parameter from configuration")
|
||||
|
||||
// errMissingOutputFromConfig - missing a parameter in handler struct
|
||||
const errMissingOutputFromConfig = cerr("missing a parameter from configuration")
|
||||
|
||||
// errWrongParamTypeFromConfig - a configuration parameter type is invalid in the handler param struct
|
||||
const errWrongParamTypeFromConfig = cerr("invalid struct field type")
|
||||
|
||||
// errMissingHandlerErrorArgument - missing handler output error
|
||||
const errMissingHandlerErrorArgument = cerr("last output must be of type api.Err")
|
||||
// errMissingHandlerErrorOutput - missing handler output error
|
||||
const errMissingHandlerErrorOutput = cerr("last output must be of type api.Err")
|
||||
|
|
|
|||
|
|
@ -1,7 +1,6 @@
|
|||
package dynfunc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"log"
|
||||
"reflect"
|
||||
|
|
@ -10,69 +9,73 @@ import (
|
|||
"git.xdrm.io/go/aicra/internal/config"
|
||||
)
|
||||
|
||||
// Handler represents a dynamic aicra service handler
|
||||
// Handler represents a dynamic api handler
|
||||
type Handler struct {
|
||||
// signature defined from the service configuration
|
||||
signature *Signature
|
||||
// fn provided function that will be the service's handler
|
||||
spec *signature
|
||||
fn interface{}
|
||||
// whether fn uses api.Ctx as 1st argument
|
||||
hasContext bool
|
||||
// index in input arguments where the data struct must be
|
||||
dataIndex int
|
||||
}
|
||||
|
||||
// Build a handler from a dynamic function and checks its signature against a
|
||||
// service configuration
|
||||
//e
|
||||
// `fn` must have as a signature : `func(*api.Context, in) (*out, api.Err)`
|
||||
// - `in` is a struct{} containing a field for each service input (with valid reflect.Type)
|
||||
// - `out` is a struct{} containing a field for each service output (with valid reflect.Type)
|
||||
// Build a handler from a service configuration and a dynamic function
|
||||
//
|
||||
// @fn must have as a signature : `func(inputStruct) (*outputStruct, api.Err)`
|
||||
// - `inputStruct` is a struct{} containing a field for each service input (with valid reflect.Type)
|
||||
// - `outputStruct` is a struct{} containing a field for each service output (with valid reflect.Type)
|
||||
//
|
||||
// Special cases:
|
||||
// - it there is no input, `in` MUST be omitted
|
||||
// - it there is no output, `out` MUST be omitted
|
||||
// - a first optional input parameter of type `api.Ctx` can be added
|
||||
// - it there is no input, `inputStruct` must be omitted
|
||||
// - it there is no output, `outputStruct` must be omitted
|
||||
func Build(fn interface{}, service config.Service) (*Handler, error) {
|
||||
var (
|
||||
h = &Handler{
|
||||
signature: BuildSignature(service),
|
||||
h := &Handler{
|
||||
spec: signatureFromService(service),
|
||||
fn: fn,
|
||||
}
|
||||
fnType = reflect.TypeOf(fn)
|
||||
)
|
||||
|
||||
if fnType.Kind() != reflect.Func {
|
||||
impl := reflect.TypeOf(fn)
|
||||
|
||||
if impl.Kind() != reflect.Func {
|
||||
return nil, errHandlerNotFunc
|
||||
}
|
||||
if err := h.signature.ValidateInput(fnType); err != nil {
|
||||
|
||||
h.hasContext = impl.NumIn() >= 1 && reflect.TypeOf(api.Ctx{}).AssignableTo(impl.In(0))
|
||||
if h.hasContext {
|
||||
h.dataIndex = 1
|
||||
}
|
||||
|
||||
if err := h.spec.checkInput(impl, h.dataIndex); err != nil {
|
||||
return nil, fmt.Errorf("input: %w", err)
|
||||
}
|
||||
if err := h.signature.ValidateOutput(fnType); err != nil {
|
||||
if err := h.spec.checkOutput(impl); err != nil {
|
||||
return nil, fmt.Errorf("output: %w", err)
|
||||
}
|
||||
|
||||
return h, nil
|
||||
}
|
||||
|
||||
// Handle binds input `data` into the dynamic function and returns an output map
|
||||
func (h *Handler) Handle(ctx context.Context, data map[string]interface{}) (map[string]interface{}, api.Err) {
|
||||
var (
|
||||
ert = reflect.TypeOf(api.Err{})
|
||||
fnv = reflect.ValueOf(h.fn)
|
||||
callArgs = make([]reflect.Value, 0)
|
||||
)
|
||||
// Handle binds input @data into the dynamic function and returns map output
|
||||
func (h *Handler) Handle(ctx api.Ctx, data map[string]interface{}) (map[string]interface{}, api.Err) {
|
||||
var ert = reflect.TypeOf(api.Err{})
|
||||
var fnv = reflect.ValueOf(h.fn)
|
||||
|
||||
// bind context
|
||||
callArgs := []reflect.Value{}
|
||||
|
||||
// bind context if used in handler
|
||||
if h.hasContext {
|
||||
callArgs = append(callArgs, reflect.ValueOf(ctx))
|
||||
}
|
||||
|
||||
inputStructRequired := fnv.Type().NumIn() > 1
|
||||
|
||||
// bind input arguments
|
||||
if inputStructRequired {
|
||||
// bind input data
|
||||
if fnv.Type().NumIn() > h.dataIndex {
|
||||
// create zero value struct
|
||||
var (
|
||||
callStructPtr = reflect.New(fnv.Type().In(1))
|
||||
callStruct = callStructPtr.Elem()
|
||||
)
|
||||
callStructPtr := reflect.New(fnv.Type().In(0))
|
||||
callStruct := callStructPtr.Elem()
|
||||
|
||||
// set each field
|
||||
for name := range h.signature.Input {
|
||||
for name := range h.spec.Input {
|
||||
field := callStruct.FieldByName(name)
|
||||
if !field.CanSet() {
|
||||
continue
|
||||
|
|
@ -112,12 +115,12 @@ func (h *Handler) Handle(ctx context.Context, data map[string]interface{}) (map[
|
|||
callArgs = append(callArgs, callStruct)
|
||||
}
|
||||
|
||||
// call the handler
|
||||
// call the HandlerFn
|
||||
output := fnv.Call(callArgs)
|
||||
|
||||
// no output OR pointer to output struct is nil
|
||||
outdata := make(map[string]interface{})
|
||||
if len(h.signature.Output) < 1 || output[0].IsNil() {
|
||||
if len(h.spec.Output) < 1 || output[0].IsNil() {
|
||||
var structerr = output[len(output)-1].Convert(ert)
|
||||
return outdata, api.Err{
|
||||
Code: int(structerr.FieldByName("Code").Int()),
|
||||
|
|
@ -129,7 +132,7 @@ func (h *Handler) Handle(ctx context.Context, data map[string]interface{}) (map[
|
|||
// extract struct from pointer
|
||||
returnStruct := output[0].Elem()
|
||||
|
||||
for name := range h.signature.Output {
|
||||
for name := range h.spec.Output {
|
||||
field := returnStruct.FieldByName(name)
|
||||
outdata[name] = field.Interface()
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,7 +1,6 @@
|
|||
package dynfunc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"testing"
|
||||
|
|
@ -9,7 +8,7 @@ import (
|
|||
"git.xdrm.io/go/aicra/api"
|
||||
)
|
||||
|
||||
type testsignature Signature
|
||||
type testsignature signature
|
||||
|
||||
// builds a mock service with provided arguments as Input and matched as Output
|
||||
func (s *testsignature) withArgs(dtypes ...reflect.Type) *testsignature {
|
||||
|
|
@ -53,7 +52,7 @@ func TestInput(t *testing.T) {
|
|||
{
|
||||
Name: "none required none provided",
|
||||
Spec: (&testsignature{}).withArgs(),
|
||||
Fn: func(context.Context) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
Fn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
HasContext: false,
|
||||
Input: []interface{}{},
|
||||
ExpectedOutput: []interface{}{},
|
||||
|
|
@ -62,7 +61,7 @@ func TestInput(t *testing.T) {
|
|||
{
|
||||
Name: "int proxy (0)",
|
||||
Spec: (&testsignature{}).withArgs(reflect.TypeOf(int(0))),
|
||||
Fn: func(ctx context.Context, in intstruct) (*intstruct, api.Err) {
|
||||
Fn: func(in intstruct) (*intstruct, api.Err) {
|
||||
return &intstruct{P1: in.P1}, api.ErrSuccess
|
||||
},
|
||||
HasContext: false,
|
||||
|
|
@ -73,7 +72,7 @@ func TestInput(t *testing.T) {
|
|||
{
|
||||
Name: "int proxy (11)",
|
||||
Spec: (&testsignature{}).withArgs(reflect.TypeOf(int(0))),
|
||||
Fn: func(ctx context.Context, in intstruct) (*intstruct, api.Err) {
|
||||
Fn: func(in intstruct) (*intstruct, api.Err) {
|
||||
return &intstruct{P1: in.P1}, api.ErrSuccess
|
||||
},
|
||||
HasContext: false,
|
||||
|
|
@ -84,7 +83,7 @@ func TestInput(t *testing.T) {
|
|||
{
|
||||
Name: "*int proxy (nil)",
|
||||
Spec: (&testsignature{}).withArgs(reflect.TypeOf(new(int))),
|
||||
Fn: func(ctx context.Context, in intptrstruct) (*intptrstruct, api.Err) {
|
||||
Fn: func(in intptrstruct) (*intptrstruct, api.Err) {
|
||||
return &intptrstruct{P1: in.P1}, api.ErrSuccess
|
||||
},
|
||||
HasContext: false,
|
||||
|
|
@ -95,7 +94,7 @@ func TestInput(t *testing.T) {
|
|||
{
|
||||
Name: "*int proxy (28)",
|
||||
Spec: (&testsignature{}).withArgs(reflect.TypeOf(new(int))),
|
||||
Fn: func(ctx context.Context, in intptrstruct) (*intstruct, api.Err) {
|
||||
Fn: func(in intptrstruct) (*intstruct, api.Err) {
|
||||
return &intstruct{P1: *in.P1}, api.ErrSuccess
|
||||
},
|
||||
HasContext: false,
|
||||
|
|
@ -106,7 +105,7 @@ func TestInput(t *testing.T) {
|
|||
{
|
||||
Name: "*int proxy (13)",
|
||||
Spec: (&testsignature{}).withArgs(reflect.TypeOf(new(int))),
|
||||
Fn: func(ctx context.Context, in intptrstruct) (*intstruct, api.Err) {
|
||||
Fn: func(in intptrstruct) (*intstruct, api.Err) {
|
||||
return &intstruct{P1: *in.P1}, api.ErrSuccess
|
||||
},
|
||||
HasContext: false,
|
||||
|
|
@ -120,9 +119,16 @@ func TestInput(t *testing.T) {
|
|||
t.Run(tcase.Name, func(t *testing.T) {
|
||||
t.Parallel()
|
||||
|
||||
var dataIndex = 0
|
||||
if tcase.HasContext {
|
||||
dataIndex = 1
|
||||
}
|
||||
|
||||
var handler = &Handler{
|
||||
signature: &Signature{Input: tcase.Spec.Input, Output: tcase.Spec.Output},
|
||||
spec: &signature{Input: tcase.Spec.Input, Output: tcase.Spec.Output},
|
||||
fn: tcase.Fn,
|
||||
dataIndex: dataIndex,
|
||||
hasContext: tcase.HasContext,
|
||||
}
|
||||
|
||||
// build input
|
||||
|
|
@ -132,7 +138,7 @@ func TestInput(t *testing.T) {
|
|||
input[key] = val
|
||||
}
|
||||
|
||||
var output, err = handler.Handle(context.Background(), input)
|
||||
var output, err = handler.Handle(api.Ctx{}, input)
|
||||
if err != tcase.ExpectedErr {
|
||||
t.Fatalf("expected api error <%v> got <%v>", tcase.ExpectedErr, err)
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,7 +1,6 @@
|
|||
package dynfunc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"strings"
|
||||
|
|
@ -10,17 +9,15 @@ import (
|
|||
"git.xdrm.io/go/aicra/internal/config"
|
||||
)
|
||||
|
||||
// Signature represents input/output arguments for service from the aicra configuration
|
||||
type Signature struct {
|
||||
// Input arguments of the service
|
||||
// signature represents input/output arguments for a dynamic function
|
||||
type signature struct {
|
||||
Input map[string]reflect.Type
|
||||
// Output arguments of the service
|
||||
Output map[string]reflect.Type
|
||||
}
|
||||
|
||||
// BuildSignature builds a signature for a service configuration
|
||||
func BuildSignature(service config.Service) *Signature {
|
||||
s := &Signature{
|
||||
// builds a spec from the configuration service
|
||||
func signatureFromService(service config.Service) *signature {
|
||||
s := &signature{
|
||||
Input: make(map[string]reflect.Type),
|
||||
Output: make(map[string]reflect.Type),
|
||||
}
|
||||
|
|
@ -47,37 +44,31 @@ func BuildSignature(service config.Service) *Signature {
|
|||
return s
|
||||
}
|
||||
|
||||
// ValidateInput validates a handler's input arguments against the service signature
|
||||
func (s *Signature) ValidateInput(handlerType reflect.Type) error {
|
||||
ctxType := reflect.TypeOf((*context.Context)(nil)).Elem()
|
||||
|
||||
// missing or invalid first arg: context.Context
|
||||
if handlerType.NumIn() < 1 {
|
||||
return errMissingHandlerContextArgument
|
||||
}
|
||||
firstArgType := handlerType.In(0)
|
||||
|
||||
if !firstArgType.Implements(ctxType) {
|
||||
return fmt.Errorf("fock")
|
||||
// checks for HandlerFn input arguments
|
||||
func (s *signature) checkInput(impl reflect.Type, index int) error {
|
||||
var requiredInput, structIndex = index, index
|
||||
if len(s.Input) > 0 { // arguments struct
|
||||
requiredInput++
|
||||
}
|
||||
|
||||
// no input required
|
||||
if len(s.Input) == 0 {
|
||||
// input struct provided
|
||||
if handlerType.NumIn() > 1 {
|
||||
// missing arguments
|
||||
if impl.NumIn() > requiredInput {
|
||||
return errUnexpectedInput
|
||||
}
|
||||
|
||||
// none required
|
||||
if len(s.Input) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
// too much arguments
|
||||
if handlerType.NumIn() > 2 {
|
||||
return errMissingHandlerInputArgument
|
||||
if impl.NumIn() != requiredInput {
|
||||
return errMissingHandlerArgumentParam
|
||||
}
|
||||
|
||||
// arg must be a struct
|
||||
inStruct := handlerType.In(1)
|
||||
if inStruct.Kind() != reflect.Struct {
|
||||
structArg := impl.In(structIndex)
|
||||
if structArg.Kind() != reflect.Struct {
|
||||
return errMissingParamArgument
|
||||
}
|
||||
|
||||
|
|
@ -87,9 +78,9 @@ func (s *Signature) ValidateInput(handlerType reflect.Type) error {
|
|||
return fmt.Errorf("%s: %w", name, errUnexportedName)
|
||||
}
|
||||
|
||||
field, exists := inStruct.FieldByName(name)
|
||||
field, exists := structArg.FieldByName(name)
|
||||
if !exists {
|
||||
return fmt.Errorf("%s: %w", name, errMissingConfigArgument)
|
||||
return fmt.Errorf("%s: %w", name, errMissingParamFromConfig)
|
||||
}
|
||||
|
||||
if !ptype.AssignableTo(field.Type) {
|
||||
|
|
@ -100,18 +91,16 @@ func (s *Signature) ValidateInput(handlerType reflect.Type) error {
|
|||
return nil
|
||||
}
|
||||
|
||||
// ValidateOutput validates a handler's output arguments against the service signature
|
||||
func (s Signature) ValidateOutput(handlerType reflect.Type) error {
|
||||
errType := reflect.TypeOf(api.ErrUnknown)
|
||||
|
||||
if handlerType.NumOut() < 1 {
|
||||
return errMissingHandlerErrorArgument
|
||||
// checks for HandlerFn output arguments
|
||||
func (s signature) checkOutput(impl reflect.Type) error {
|
||||
if impl.NumOut() < 1 {
|
||||
return errMissingHandlerOutput
|
||||
}
|
||||
|
||||
// last output must be api.Err
|
||||
lastArgType := handlerType.Out(handlerType.NumOut() - 1)
|
||||
if !lastArgType.AssignableTo(errType) {
|
||||
return errMissingHandlerErrorArgument
|
||||
errOutput := impl.Out(impl.NumOut() - 1)
|
||||
if !errOutput.AssignableTo(reflect.TypeOf(api.ErrUnknown)) {
|
||||
return errMissingHandlerErrorOutput
|
||||
}
|
||||
|
||||
// no output -> ok
|
||||
|
|
@ -119,19 +108,19 @@ func (s Signature) ValidateOutput(handlerType reflect.Type) error {
|
|||
return nil
|
||||
}
|
||||
|
||||
if handlerType.NumOut() < 2 {
|
||||
return errMissingHandlerOutputArgument
|
||||
if impl.NumOut() != 2 {
|
||||
return errMissingParamOutput
|
||||
}
|
||||
|
||||
// fail if first output is not a pointer to struct
|
||||
outStructPtr := handlerType.Out(0)
|
||||
if outStructPtr.Kind() != reflect.Ptr {
|
||||
return errWrongOutputArgumentType
|
||||
structOutputPtr := impl.Out(0)
|
||||
if structOutputPtr.Kind() != reflect.Ptr {
|
||||
return errMissingParamOutput
|
||||
}
|
||||
|
||||
outStruct := outStructPtr.Elem()
|
||||
if outStruct.Kind() != reflect.Struct {
|
||||
return errWrongOutputArgumentType
|
||||
structOutput := structOutputPtr.Elem()
|
||||
if structOutput.Kind() != reflect.Struct {
|
||||
return errMissingParamOutput
|
||||
}
|
||||
|
||||
// fail on invalid output
|
||||
|
|
@ -140,9 +129,9 @@ func (s Signature) ValidateOutput(handlerType reflect.Type) error {
|
|||
return fmt.Errorf("%s: %w", name, errUnexportedName)
|
||||
}
|
||||
|
||||
field, exists := outStruct.FieldByName(name)
|
||||
field, exists := structOutput.FieldByName(name)
|
||||
if !exists {
|
||||
return fmt.Errorf("%s: %w", name, errMissingConfigArgument)
|
||||
return fmt.Errorf("%s: %w", name, errMissingOutputFromConfig)
|
||||
}
|
||||
|
||||
// ignore types evalutating to nil
|
||||
|
|
|
|||
|
|
@ -1,7 +1,6 @@
|
|||
package dynfunc
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
"reflect"
|
||||
|
|
@ -21,22 +20,22 @@ func TestInputCheck(t *testing.T) {
|
|||
{
|
||||
Name: "no input 0 given",
|
||||
Input: map[string]reflect.Type{},
|
||||
Fn: func(context.Context) {},
|
||||
FnCtx: func(context.Context) {},
|
||||
Fn: func() {},
|
||||
FnCtx: func(api.Ctx) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
Name: "no input 1 given",
|
||||
Input: map[string]reflect.Type{},
|
||||
Fn: func(context.Context, int) {},
|
||||
FnCtx: func(context.Context, int) {},
|
||||
Fn: func(int) {},
|
||||
FnCtx: func(api.Ctx, int) {},
|
||||
Err: errUnexpectedInput,
|
||||
},
|
||||
{
|
||||
Name: "no input 2 given",
|
||||
Input: map[string]reflect.Type{},
|
||||
Fn: func(context.Context, int, string) {},
|
||||
FnCtx: func(context.Context, int, string) {},
|
||||
Fn: func(int, string) {},
|
||||
FnCtx: func(api.Ctx, int, string) {},
|
||||
Err: errUnexpectedInput,
|
||||
},
|
||||
{
|
||||
|
|
@ -44,17 +43,17 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func(context.Context) {},
|
||||
FnCtx: func(context.Context) {},
|
||||
Err: errMissingHandlerInputArgument,
|
||||
Fn: func() {},
|
||||
FnCtx: func(api.Ctx) {},
|
||||
Err: errMissingHandlerArgumentParam,
|
||||
},
|
||||
{
|
||||
Name: "1 input non-struct given",
|
||||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func(context.Context, int) {},
|
||||
FnCtx: func(context.Context, int) {},
|
||||
Fn: func(int) {},
|
||||
FnCtx: func(api.Ctx, int) {},
|
||||
Err: errMissingParamArgument,
|
||||
},
|
||||
{
|
||||
|
|
@ -62,8 +61,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func(context.Context, struct{}) {},
|
||||
FnCtx: func(context.Context, struct{}) {},
|
||||
Fn: func(struct{}) {},
|
||||
FnCtx: func(api.Ctx, struct{}) {},
|
||||
Err: errUnexportedName,
|
||||
},
|
||||
{
|
||||
|
|
@ -71,17 +70,17 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func(context.Context, struct{}) {},
|
||||
FnCtx: func(context.Context, struct{}) {},
|
||||
Err: errMissingConfigArgument,
|
||||
Fn: func(struct{}) {},
|
||||
FnCtx: func(api.Ctx, struct{}) {},
|
||||
Err: errMissingParamFromConfig,
|
||||
},
|
||||
{
|
||||
Name: "1 input invalid given",
|
||||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 string }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 string }) {},
|
||||
Fn: func(struct{ Test1 string }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 string }) {},
|
||||
Err: errWrongParamTypeFromConfig,
|
||||
},
|
||||
{
|
||||
|
|
@ -89,8 +88,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 int }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 int }) {},
|
||||
Fn: func(struct{ Test1 int }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 int }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -98,17 +97,17 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(int)),
|
||||
},
|
||||
Fn: func(context.Context, struct{}) {},
|
||||
FnCtx: func(context.Context, struct{}) {},
|
||||
Err: errMissingConfigArgument,
|
||||
Fn: func(struct{}) {},
|
||||
FnCtx: func(api.Ctx, struct{}) {},
|
||||
Err: errMissingParamFromConfig,
|
||||
},
|
||||
{
|
||||
Name: "1 input ptr invalid given",
|
||||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(int)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 string }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 string }) {},
|
||||
Fn: func(struct{ Test1 string }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 string }) {},
|
||||
Err: errWrongParamTypeFromConfig,
|
||||
},
|
||||
{
|
||||
|
|
@ -116,8 +115,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(int)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *string }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *string }) {},
|
||||
Fn: func(struct{ Test1 *string }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *string }) {},
|
||||
Err: errWrongParamTypeFromConfig,
|
||||
},
|
||||
{
|
||||
|
|
@ -125,8 +124,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(int)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *int }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *int }) {},
|
||||
Fn: func(struct{ Test1 *int }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *int }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -134,8 +133,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(string("")),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 string }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 string }) {},
|
||||
Fn: func(struct{ Test1 string }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 string }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -143,8 +142,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(uint(0)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 uint }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 uint }) {},
|
||||
Fn: func(struct{ Test1 uint }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 uint }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -152,8 +151,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(float64(0)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 float64 }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 float64 }) {},
|
||||
Fn: func(struct{ Test1 float64 }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 float64 }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -161,8 +160,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf([]byte("")),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 []byte }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 []byte }) {},
|
||||
Fn: func(struct{ Test1 []byte }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 []byte }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -170,8 +169,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf([]rune("")),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 []rune }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 []rune }) {},
|
||||
Fn: func(struct{ Test1 []rune }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 []rune }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -179,8 +178,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(string)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *string }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *string }) {},
|
||||
Fn: func(struct{ Test1 *string }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *string }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -188,8 +187,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(uint)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *uint }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *uint }) {},
|
||||
Fn: func(struct{ Test1 *uint }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *uint }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -197,8 +196,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new(float64)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *float64 }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *float64 }) {},
|
||||
Fn: func(struct{ Test1 *float64 }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *float64 }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -206,8 +205,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new([]byte)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *[]byte }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *[]byte }) {},
|
||||
Fn: func(struct{ Test1 *[]byte }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *[]byte }) {},
|
||||
Err: nil,
|
||||
},
|
||||
{
|
||||
|
|
@ -215,8 +214,8 @@ func TestInputCheck(t *testing.T) {
|
|||
Input: map[string]reflect.Type{
|
||||
"Test1": reflect.TypeOf(new([]rune)),
|
||||
},
|
||||
Fn: func(context.Context, struct{ Test1 *[]rune }) {},
|
||||
FnCtx: func(context.Context, struct{ Test1 *[]rune }) {},
|
||||
Fn: func(struct{ Test1 *[]rune }) {},
|
||||
FnCtx: func(api.Ctx, struct{ Test1 *[]rune }) {},
|
||||
Err: nil,
|
||||
},
|
||||
}
|
||||
|
|
@ -226,12 +225,13 @@ func TestInputCheck(t *testing.T) {
|
|||
t.Parallel()
|
||||
|
||||
// mock spec
|
||||
s := Signature{
|
||||
s := signature{
|
||||
Input: tcase.Input,
|
||||
Output: nil,
|
||||
}
|
||||
|
||||
err := s.ValidateInput(reflect.TypeOf(tcase.FnCtx))
|
||||
t.Run("with-context", func(t *testing.T) {
|
||||
err := s.checkInput(reflect.TypeOf(tcase.FnCtx), 1)
|
||||
if err == nil && tcase.Err != nil {
|
||||
t.Errorf("expected an error: '%s'", tcase.Err.Error())
|
||||
t.FailNow()
|
||||
|
|
@ -248,6 +248,25 @@ func TestInputCheck(t *testing.T) {
|
|||
}
|
||||
}
|
||||
})
|
||||
t.Run("without-context", func(t *testing.T) {
|
||||
err := s.checkInput(reflect.TypeOf(tcase.Fn), 0)
|
||||
if err == nil && tcase.Err != nil {
|
||||
t.Errorf("expected an error: '%s'", tcase.Err.Error())
|
||||
t.FailNow()
|
||||
}
|
||||
if err != nil && tcase.Err == nil {
|
||||
t.Errorf("unexpected error: '%s'", err.Error())
|
||||
t.FailNow()
|
||||
}
|
||||
|
||||
if err != nil && tcase.Err != nil {
|
||||
if !errors.Is(err, tcase.Err) {
|
||||
t.Errorf("expected the error <%s> got <%s>", tcase.Err, err)
|
||||
t.FailNow()
|
||||
}
|
||||
}
|
||||
})
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -260,37 +279,25 @@ func TestOutputCheck(t *testing.T) {
|
|||
// no input -> missing api.Err
|
||||
{
|
||||
Output: map[string]reflect.Type{},
|
||||
Fn: func(context.Context) {},
|
||||
Err: errMissingHandlerOutputArgument,
|
||||
Fn: func() {},
|
||||
Err: errMissingHandlerOutput,
|
||||
},
|
||||
// no input -> with last type not api.Err
|
||||
{
|
||||
Output: map[string]reflect.Type{},
|
||||
Fn: func(context.Context) bool { return true },
|
||||
Err: errMissingHandlerErrorArgument,
|
||||
Fn: func() bool { return true },
|
||||
Err: errMissingHandlerErrorOutput,
|
||||
},
|
||||
// no input -> with api.Err
|
||||
{
|
||||
Output: map[string]reflect.Type{},
|
||||
Fn: func(context.Context) api.Err { return api.ErrSuccess },
|
||||
Fn: func() api.Err { return api.ErrSuccess },
|
||||
Err: nil,
|
||||
},
|
||||
// no input -> missing context.Context
|
||||
{
|
||||
Output: map[string]reflect.Type{},
|
||||
Fn: func(context.Context) api.Err { return api.ErrSuccess },
|
||||
Err: errMissingHandlerContextArgument,
|
||||
},
|
||||
// no input -> invlaid context.Context type
|
||||
{
|
||||
Output: map[string]reflect.Type{},
|
||||
Fn: func(context.Context, int) api.Err { return api.ErrSuccess },
|
||||
Err: errMissingHandlerContextArgument,
|
||||
},
|
||||
// func can have output if not specified
|
||||
{
|
||||
Output: map[string]reflect.Type{},
|
||||
Fn: func(context.Context) (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
Fn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
Err: nil,
|
||||
},
|
||||
// missing output struct in func
|
||||
|
|
@ -299,7 +306,7 @@ func TestOutputCheck(t *testing.T) {
|
|||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func() api.Err { return api.ErrSuccess },
|
||||
Err: errWrongOutputArgumentType,
|
||||
Err: errMissingParamOutput,
|
||||
},
|
||||
// output not a pointer
|
||||
{
|
||||
|
|
@ -307,7 +314,7 @@ func TestOutputCheck(t *testing.T) {
|
|||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func() (int, api.Err) { return 0, api.ErrSuccess },
|
||||
Err: errWrongOutputArgumentType,
|
||||
Err: errMissingParamOutput,
|
||||
},
|
||||
// output not a pointer to struct
|
||||
{
|
||||
|
|
@ -315,7 +322,7 @@ func TestOutputCheck(t *testing.T) {
|
|||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func() (*int, api.Err) { return nil, api.ErrSuccess },
|
||||
Err: errWrongOutputArgumentType,
|
||||
Err: errMissingParamOutput,
|
||||
},
|
||||
// unexported param name
|
||||
{
|
||||
|
|
@ -331,7 +338,7 @@ func TestOutputCheck(t *testing.T) {
|
|||
"Test1": reflect.TypeOf(int(0)),
|
||||
},
|
||||
Fn: func() (*struct{}, api.Err) { return nil, api.ErrSuccess },
|
||||
Err: errMissingConfigArgument,
|
||||
Err: errMissingParamFromConfig,
|
||||
},
|
||||
// output field invalid type
|
||||
{
|
||||
|
|
@ -364,12 +371,12 @@ func TestOutputCheck(t *testing.T) {
|
|||
t.Parallel()
|
||||
|
||||
// mock spec
|
||||
s := Signature{
|
||||
s := signature{
|
||||
Input: nil,
|
||||
Output: tcase.Output,
|
||||
}
|
||||
|
||||
err := s.ValidateOutput(reflect.TypeOf(tcase.Fn))
|
||||
err := s.checkOutput(reflect.TypeOf(tcase.Fn))
|
||||
if err == nil && tcase.Err != nil {
|
||||
t.Errorf("expected an error: '%s'", tcase.Err.Error())
|
||||
t.FailNow()
|
||||
|
|
|
|||
Loading…
Reference in New Issue