add path handler option

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

go.mod

@@ -3,8 +3,8 @@ module github.com/unistack-org/micro-server-http/v3
 go 1.16
 
 require (
-	github.com/unistack-org/micro/v3 v3.3.0
-	golang.org/x/net v0.0.0-20210324051636-2c4c8ecb7826
+	github.com/unistack-org/micro/v3 v3.3.13
+	golang.org/x/net v0.0.0-20210410081132-afb366fc7cd1
 )
 
 //replace github.com/unistack-org/micro/v3 => ../../micro

go.sum

@@ -8,15 +8,58 @@ github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTK
 github.com/silas/dag v0.0.0-20210121180416-41cf55125c34/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
 github.com/unistack-org/micro/v3 v3.3.0 h1:pEj/8QVFzMlNMEL//q/Te8qgG+XI6LTYIQrb6hMymgk=
 github.com/unistack-org/micro/v3 v3.3.0/go.mod h1:iJwCWq2PECMxigfqe6TPC5GLWvj6P94Kk+PTVZGL3w8=
+github.com/unistack-org/micro/v3 v3.3.1 h1:2KUgb5THy5GUjYgMcOf3TXYIJ0h2RbJHb2j6eeWdRx0=
+github.com/unistack-org/micro/v3 v3.3.1/go.mod h1:iJwCWq2PECMxigfqe6TPC5GLWvj6P94Kk+PTVZGL3w8=
+github.com/unistack-org/micro/v3 v3.3.2 h1:1r7fmaobJVZBKDhIewSBy8R4H/6YazQFetsDgULV6Mw=
+github.com/unistack-org/micro/v3 v3.3.2/go.mod h1:tX95c0Qx4w6oqU7qKThs9lya9P507BdZ29MsTVDmU6w=
+github.com/unistack-org/micro/v3 v3.3.4 h1:wSYjL1sfrqtMmgFfYKylrKpAepMHrPcOpe10hvQAKuo=
+github.com/unistack-org/micro/v3 v3.3.4/go.mod h1:tX95c0Qx4w6oqU7qKThs9lya9P507BdZ29MsTVDmU6w=
+github.com/unistack-org/micro/v3 v3.3.7 h1:AKQEevrlT2aqHYRFGd6BEFNnurHLvJyqvWvLCFP7iX4=
+github.com/unistack-org/micro/v3 v3.3.7/go.mod h1:M3RGgKZX1OlTn0QB+3R1tlSoGwmEg6rb/Isr0lLYmjQ=
+github.com/unistack-org/micro/v3 v3.3.8 h1:4e4gWuZI/cRUGZ6ZZpdrIDOF2MLO6cjHxeFfZzy610Y=
+github.com/unistack-org/micro/v3 v3.3.8/go.mod h1:M3RGgKZX1OlTn0QB+3R1tlSoGwmEg6rb/Isr0lLYmjQ=
+github.com/unistack-org/micro/v3 v3.3.9 h1:NFF4wymDDxgYeZU++04BxvETrrAnd0iNzVyfm/ssQI4=
+github.com/unistack-org/micro/v3 v3.3.9/go.mod h1:M3RGgKZX1OlTn0QB+3R1tlSoGwmEg6rb/Isr0lLYmjQ=
+github.com/unistack-org/micro/v3 v3.3.10 h1:yMSiyplupFQ7xy/kNXL/zqSnqGSjrlNa2GTCwea5BVg=
+github.com/unistack-org/micro/v3 v3.3.10/go.mod h1:5ragE2E8ER5d4FZQJG9pB6qdfOoLXLfKW89l77Dy3jQ=
+github.com/unistack-org/micro/v3 v3.3.11 h1:Jr0gAw5lLqgddiHKQeWUOUeP6ZqgRhz52EA9zJ5MJ3U=
+github.com/unistack-org/micro/v3 v3.3.11/go.mod h1:PPCt675o3HPcODFbJ4iRWPmQFAk1WQ+asQSOb/syq6U=
+github.com/unistack-org/micro/v3 v3.3.13 h1:y4bDDkbwnjgOckrhFkC6D/o42tr75X33UbrB+Ko0M68=
+github.com/unistack-org/micro/v3 v3.3.13/go.mod h1:98hNcMXp/WyWJwLwCuwrhN1Jm7aCWaRNsMfRjK8Fq+Y=
 golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
 golang.org/x/net v0.0.0-20210323141857-08027d57d8cf h1:sewfyKLWuY3ko6EI4hbFziQ8bHkfammpzCDfLT92I1c=
 golang.org/x/net v0.0.0-20210323141857-08027d57d8cf/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
 golang.org/x/net v0.0.0-20210324051636-2c4c8ecb7826 h1:lNRDRnwZWawoPHDS50ebYHTOHjctRMLSrUSQFcAHiW4=
 golang.org/x/net v0.0.0-20210324051636-2c4c8ecb7826/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
+golang.org/x/net v0.0.0-20210324205630-d1beb07c2056 h1:sANdAef76Ioam9aQUUdcAqricwY/WUaMc4+7LY4eGg8=
+golang.org/x/net v0.0.0-20210324205630-d1beb07c2056/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
+golang.org/x/net v0.0.0-20210326060303-6b1517762897 h1:KrsHThm5nFk34YtATK1LsThyGhGbGe1olrte/HInHvs=
+golang.org/x/net v0.0.0-20210326060303-6b1517762897/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
+golang.org/x/net v0.0.0-20210326220855-61e056675ecf h1:WUcCxqQqDT0aXO4VnQbfMvp4zh7m1Gb2clVuHUAGGRE=
+golang.org/x/net v0.0.0-20210326220855-61e056675ecf/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
+golang.org/x/net v0.0.0-20210329181859-df645c7b52b1 h1:GDp1VG8WvY8lq4ic4L7GzKC3fNRlOa3UqUEpib8aBQE=
+golang.org/x/net v0.0.0-20210329181859-df645c7b52b1/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
+golang.org/x/net v0.0.0-20210330075724-22f4162a9025 h1:WkEv4x2mvGbnkuK9cWl/Ru2pzfVxAgpSDLT/holPSug=
+golang.org/x/net v0.0.0-20210330075724-22f4162a9025/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
+golang.org/x/net v0.0.0-20210330142815-c8897c278d10 h1:j6SlnKgJhONcqBZAH/cLNz6hg79L7Q18RY4BiN0r0LI=
+golang.org/x/net v0.0.0-20210330142815-c8897c278d10/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
+golang.org/x/net v0.0.0-20210330230544-e57232859fb2 h1:nGCZOty+lVDsc4H2qPFksI5Se296+V+GhMiL/TzmYNk=
+golang.org/x/net v0.0.0-20210330230544-e57232859fb2/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210331060903-cb1fcc7394e5 h1:zuP3axpB9rV3xH0EA7n3/gCrNPZm2SRl0l4mVH2BRj4=
+golang.org/x/net v0.0.0-20210331060903-cb1fcc7394e5/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210331212208-0fccb6fa2b5c h1:KHUzaHIpjWVlVVNh65G3hhuj3KB1HnjY6Cq5cTvRQT8=
+golang.org/x/net v0.0.0-20210331212208-0fccb6fa2b5c/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210410081132-afb366fc7cd1 h1:4qWs8cYYH6PoEFy4dfhDFgoMGkwAcETd+MmPdCPMzUc=
+golang.org/x/net v0.0.0-20210410081132-afb366fc7cd1/go.mod h1:9tjilg8BloeKEkVJvy7fQ90B1CfIiPueXVOjqfkSzI8=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

handler.go

@@ -66,6 +66,14 @@ func (h *httpHandler) Options() server.HandlerOptions {
 }
 
 func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+
+	for exp, ph := range h.pathHandlers {
+		if exp.MatchString(r.URL.String()) {
+			ph(w, r)
+			return
+		}
+	}
+
 	ctx := metadata.NewContext(r.Context(), nil)
 
 	defer r.Body.Close()
@@ -81,7 +89,15 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		ct = htype
 	}
 
-	cf, err := h.newCodec(ct)
+	var cf codec.Codec
+	var err error
+	switch ct {
+	case "application/x-www-form-urlencoded":
+		cf, err = h.newCodec(strings.Split(DefaultContentType, ";")[0])
+	default:
+		cf, err = h.newCodec(strings.Split(ct, ";")[0])
+	}
+
 	if err != nil {
 		h.errorHandler(ctx, nil, w, r, err, http.StatusBadRequest)
 		return
@@ -101,6 +117,7 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	matches := make(map[string]interface{})
+
 	var match bool
 	var hldr patHandler
 	var handler *httpHandler
@@ -146,6 +163,22 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	if ct == "application/x-www-form-urlencoded" {
+		buf, err := io.ReadAll(r.Body)
+		if err != nil {
+			h.errorHandler(ctx, nil, w, r, err, http.StatusBadRequest)
+			return
+		}
+		umd, err := rflutil.URLMap(string(buf))
+		if err != nil {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+			return
+		}
+		for k, v := range umd {
+			matches[k] = v
+		}
+	}
+
 	var argv, replyv reflect.Value
 
 	// Decode the argument value.
@@ -168,21 +201,26 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	//function := hldr.rcvr
 	var returnValues []reflect.Value
 
-	if err = cf.ReadBody(r.Body, argv.Interface()); err != nil && err != io.EOF {
-		h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
-		return
+	if ct != "application/x-www-form-urlencoded" {
+		if err = cf.ReadBody(r.Body, argv.Interface()); err != nil && err != io.EOF {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
+			return
+		}
 	}
 
 	matches = rflutil.FlattenMap(matches)
-	if err = rflutil.MergeMap(argv.Interface(), matches); err != nil {
+	if err = rflutil.Merge(argv.Interface(), matches, rflutil.SliceAppend(true), rflutil.Tags([]string{"protobuf", "json"})); err != nil {
 		h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
 		return
 	}
 
-	b, err := cf.Marshal(argv.Interface())
-	if err != nil {
-		h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
-		return
+	var b []byte
+	if ct != "application/x-www-form-urlencoded" {
+		b, err = cf.Marshal(argv.Interface())
+		if err != nil {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+			return
+		}
 	}
 
 	hr := &rpcRequest{

http.go

@@ -8,6 +8,7 @@ import (
 	"net"
 	"net/http"
 	"reflect"
+	"regexp"
 	"sort"
 	"strings"
 	"sync"
@@ -35,6 +36,7 @@ type httpServer struct {
 	rsvc         *register.Service
 	init         bool
 	errorHandler func(context.Context, server.Handler, http.ResponseWriter, *http.Request, error, int)
+	pathHandlers map[*regexp.Regexp]http.HandlerFunc
 }
 
 func (h *httpServer) newCodec(ct string) (codec.Codec, error) {
@@ -57,20 +59,29 @@ func (h *httpServer) Init(opts ...server.Option) error {
 	}
 
 	h.Lock()
+	defer h.Unlock()
+
 	for _, o := range opts {
 		o(&h.opts)
 	}
 	if fn, ok := h.opts.Context.Value(errorHandlerKey{}).(func(ctx context.Context, s server.Handler, w http.ResponseWriter, r *http.Request, err error, status int)); ok && fn != nil {
 		h.errorHandler = fn
 	}
-	if h.errorHandler == nil {
-		h.errorHandler = DefaultErrorHandler
-	}
 	if h.handlers == nil {
 		h.handlers = make(map[string]server.Handler)
 	}
-	h.Unlock()
-
+	if h.pathHandlers == nil {
+		h.pathHandlers = make(map[*regexp.Regexp]http.HandlerFunc)
+	}
+	if phs, ok := h.opts.Context.Value(pathHandlerKey{}).(*pathHandlerVal); ok && phs.h != nil {
+		for pp, ph := range phs.h {
+			exp, err := regexp.Compile(pp)
+			if err != nil {
+				return err
+			}
+			h.pathHandlers[exp] = ph
+		}
+	}
 	if err := h.opts.Register.Init(); err != nil {
 		return err
 	}
@@ -553,8 +564,10 @@ func (h *httpServer) Name() string {
 func NewServer(opts ...server.Option) server.Server {
 	options := server.NewOptions(opts...)
 	return &httpServer{
-		opts:        options,
-		exit:        make(chan chan error),
-		subscribers: make(map[*httpSubscriber][]broker.Subscriber),
+		opts:         options,
+		exit:         make(chan chan error),
+		subscribers:  make(map[*httpSubscriber][]broker.Subscriber),
+		errorHandler: DefaultErrorHandler,
+		pathHandlers: make(map[*regexp.Regexp]http.HandlerFunc),
 	}
 }

options.go

@@ -65,5 +65,22 @@ func ErrorHandler(fn func(ctx context.Context, s server.Handler, w http.Response
 	return server.SetOption(errorHandlerKey{}, fn)
 }
 
-// type pathHandlerKey struct{}
-// PathHandler specifies http handler for path
+type pathHandlerKey struct{}
+type pathHandlerVal struct {
+	h map[string]http.HandlerFunc
+}
+
+// PathHandler specifies http handler for path regexp
+func PathHandler(path string, h http.HandlerFunc) server.Option {
+	return func(o *server.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		v, ok := o.Context.Value(pathHandlerKey{}).(*pathHandlerVal)
+		if !ok {
+			v = &pathHandlerVal{h: make(map[string]http.HandlerFunc)}
+		}
+		v.h[path] = h
+		o.Context = context.WithValue(o.Context, pathHandlerKey{}, v)
+	}
+}