add scripting support for attributes matching

app/router/condition.go

@@ -5,6 +5,9 @@ package router
 import (
 	"strings"
 
+	"go.starlark.net/starlark"
+	"go.starlark.net/syntax"
+
 	"v2ray.com/core/common/net"
 	"v2ray.com/core/common/strmatcher"
 )
@@ -280,3 +283,60 @@ func (m *ProtocolMatcher) Apply(ctx *Context) bool {
 
 	return false
 }
+
+type AttributeMatcher struct {
+	program *starlark.Program
+}
+
+func NewAttributeMatcher(code string) (*AttributeMatcher, error) {
+	starFile, err := syntax.Parse("attr.star", "satisfied=("+code+")", 0)
+	if err != nil {
+		return nil, newError("attr rule").Base(err)
+	}
+	p, err := starlark.FileProgram(starFile, func(name string) bool {
+		if name == "attrs" {
+			return true
+		}
+		return false
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &AttributeMatcher{
+		program: p,
+	}, nil
+}
+
+func (m *AttributeMatcher) Match(attrs map[string]interface{}) bool {
+	attrsDict := new(starlark.Dict)
+	for key, value := range attrs {
+		var starValue starlark.Value
+		switch value := value.(type) {
+		case string:
+			starValue = starlark.String(value)
+		}
+		if starValue != nil {
+			attrsDict.SetKey(starlark.String(key), starValue)
+		}
+	}
+
+	predefined := make(starlark.StringDict)
+	predefined["attrs"] = attrsDict
+
+	thread := &starlark.Thread{
+		Name: "matcher",
+	}
+	results, err := m.program.Init(thread, predefined)
+	if err != nil {
+		newError("attr matcher").Base(err).WriteToLog()
+	}
+	satisfied := results["satisfied"]
+	return satisfied != nil && bool(satisfied.Truth())
+}
+
+func (m *AttributeMatcher) Apply(ctx *Context) bool {
+	if ctx.Content == nil {
+		return false
+	}
+	return m.Match(ctx.Content.Attributes)
+}

app/router/condition_test.go

@@ -264,6 +264,18 @@ func TestRoutingRule(t *testing.T) {
 				},
 			},
 		},
+		{
+			rule: &RoutingRule{
+				Protocol:   []string{"http"},
+				Attributes: "attrs[':path'].startswith('/test')",
+			},
+			test: []ruleTest{
+				{
+					input:  &Context{Content: &session.Content{Protocol: "http/1.1", Attributes: map[string]interface{}{":path": "/test/1"}}},
+					output: true,
+				},
+			},
+		},
 	}
 
 	for _, test := range cases {

app/router/config.go

@@ -126,6 +126,14 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 		conds.Add(NewProtocolMatcher(rr.Protocol))
 	}
 
+	if len(rr.Attributes) > 0 {
+		cond, err := NewAttributeMatcher(rr.Attributes)
+		if err != nil {
+			return nil, err
+		}
+		conds.Add(cond)
+	}
+
 	if conds.Len() == 0 {
 		return nil, newError("this rule has no effective fields").AtWarning()
 	}

app/router/config.pb.go

@@ -488,6 +488,7 @@ type RoutingRule struct {
 	UserEmail            []string `protobuf:"bytes,7,rep,name=user_email,json=userEmail,proto3" json:"user_email,omitempty"`
 	InboundTag           []string `protobuf:"bytes,8,rep,name=inbound_tag,json=inboundTag,proto3" json:"inbound_tag,omitempty"`
 	Protocol             []string `protobuf:"bytes,9,rep,name=protocol,proto3" json:"protocol,omitempty"`
+	Attributes           string   `protobuf:"bytes,15,opt,name=attributes,proto3" json:"attributes,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -643,6 +644,13 @@ func (m *RoutingRule) GetProtocol() []string {
 	return nil
 }
 
+func (m *RoutingRule) GetAttributes() string {
+	if m != nil {
+		return m.Attributes
+	}
+	return ""
+}
+
 // XXX_OneofWrappers is for the internal use of the proto package.
 func (*RoutingRule) XXX_OneofWrappers() []interface{} {
 	return []interface{}{
@@ -773,62 +781,62 @@ func init() {
 }
 
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-	0x4d, 0xf4, 0x17, 0x83, 0x5e, 0xc0, 0x5b, 0xa6, 0x89, 0x67, 0x95, 0x14, 0xa9, 0x24, 0xf9, 0xca,
+	0xa6, 0x89, 0x8f, 0xc3, 0xf5, 0xc6, 0x95, 0xf5, 0xc7, 0x7f, 0xb8, 0xd0, 0x9a, 0xe8, 0x2f, 0x08,
-	0xae, 0xfd, 0xcf, 0x76, 0xe5, 0xd2, 0x7c, 0x4d, 0x66, 0x02, 0xae, 0xac, 0x0f, 0xee, 0x2d, 0xb6,
+	0xbd, 0x80, 0xfb, 0xe6, 0x91, 0xcf, 0x2a, 0x29, 0x52, 0x49, 0xf2, 0x95, 0xfd, 0x16, 0x3e, 0xdb,
-	0x64, 0xf5, 0x85, 0x88, 0xba, 0x24, 0x76, 0x8c, 0x76, 0x7d, 0x21, 0xb7, 0xa6, 0x16, 0x6b, 0x3c,
+	0x97, 0x6b, 0xf3, 0x75, 0x99, 0x0e, 0xb9, 0xb2, 0x31, 0xb8, 0xb7, 0xd8, 0xb1, 0xd5, 0x17, 0x23,
-	0xfa, 0x1e, 0x7a, 0x9b, 0x39, 0xd5, 0x11, 0xcc, 0x4c, 0x3d, 0xda, 0x11, 0x61, 0x2b, 0x2d, 0x78,
+	0xea, 0x92, 0xd8, 0x36, 0xdb, 0xf7, 0xc5, 0xdc, 0xe8, 0x6a, 0xac, 0xf1, 0xe8, 0x7b, 0xe8, 0x6d,
-	0x33, 0xe3, 0x4a, 0x8c, 0xcf, 0xa0, 0xb7, 0x4d, 0x53, 0x2d, 0xeb, 0x93, 0x6a, 0x5a, 0x99, 0x6d,
+	0xfb, 0x58, 0x33, 0x98, 0x9e, 0x7b, 0xb4, 0x87, 0x61, 0x27, 0x2d, 0x78, 0x3b, 0x03, 0x94, 0x19,
-	0xfe, 0xa2, 0x22, 0x53, 0x1e, 0x3a, 0x28, 0x84, 0xce, 0x94, 0x4f, 0xaf, 0x2f, 0x18, 0xfd, 0x31,
+	0x9f, 0x41, 0x6f, 0x57, 0xa6, 0x1a, 0xe6, 0x27, 0xd5, 0xb4, 0x32, 0xd3, 0xfe, 0x45, 0x45, 0xa6,
-	0x95, 0xd9, 0xaf, 0xa1, 0x8b, 0x7a, 0x00, 0x53, 0xfe, 0x13, 0x3d, 0x25, 0xcb, 0x94, 0x2e, 0x42,
+	0x3c, 0x74, 0x50, 0x08, 0x9d, 0x29, 0x9f, 0x5e, 0x5f, 0x30, 0xfa, 0x63, 0x2a, 0xb3, 0x5f, 0x43,
-	0x6f, 0xfc, 0x0d, 0xbc, 0x97, 0xb1, 0xe5, 0xdd, 0x14, 0x2e, 0x9d, 0x9f, 0x5b, 0xe6, 0xf4, 0xbb,
+	0x17, 0xf5, 0x00, 0xa6, 0xfc, 0x27, 0x7a, 0x4a, 0x96, 0x29, 0x5d, 0x84, 0xde, 0xf8, 0x1b, 0x78,
-	0xfb, 0xf0, 0xe5, 0x08, 0xa7, 0xab, 0x64, 0xa2, 0x10, 0x27, 0x9c, 0xeb, 0xf7, 0x11, 0x31, 0x6f,
+	0x3f, 0x63, 0xcb, 0xb7, 0x4b, 0xb8, 0x74, 0x7e, 0x6e, 0x99, 0xd5, 0xef, 0xee, 0x83, 0x97, 0x23,
-	0xe9, 0xb2, 0x3e, 0xf9, 0x3b, 0x00, 0x00, 0xff, 0xff, 0xb2, 0x28, 0x0d, 0x41, 0xf1, 0x07, 0x00,
+	0x9c, 0xae, 0x92, 0x89, 0x42, 0x9c, 0x70, 0xae, 0xef, 0x47, 0xc4, 0xbc, 0xa5, 0xcb, 0xfe, 0xe4,
-	0x00,
+	0xef, 0x00, 0x00, 0x00, 0xff, 0xff, 0x7b, 0x3e, 0x38, 0x1b, 0x11, 0x08, 0x00, 0x00,
 }

app/router/config.proto

@@ -113,6 +113,8 @@ message RoutingRule {
   repeated string user_email = 7;
   repeated string inbound_tag = 8;
   repeated string protocol = 9;
+
+  string attributes = 15;
 }
 
 message BalancingRule {

go.mod

@@ -5,6 +5,7 @@ require (
 	github.com/golang/protobuf v1.2.1-0.20190205222052-c823c79ea157
 	github.com/google/go-cmp v0.2.0
 	github.com/miekg/dns v1.1.4
+	go.starlark.net v0.0.0-20190225160109-1174b2613e82
 	golang.org/x/crypto v0.0.0-20190208162236-193df9c0f06f
 	golang.org/x/net v0.0.0-20190206173232-65e2d4e15006
 	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f

go.sum

@@ -1,5 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/mock v1.2.0 h1:28o5sBqPkBsMGnC6b4MvE2TzSr5/AT4c/1fLqVGIwlk=
@@ -9,8 +10,11 @@ github.com/golang/protobuf v1.2.1-0.20190205222052-c823c79ea157 h1:SdQMHsZ18/XZC
 github.com/golang/protobuf v1.2.1-0.20190205222052-c823c79ea157/go.mod h1:Qd/q+1AKNOZr9uGQzbzCmRO6sUih6GTPZv6a1/R87v0=
 github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/miekg/dns v1.1.4 h1:rCMZsU2ScVSYcAsOXgmC6+AKOK+6pmQTOcw03nfwYV0=
 github.com/miekg/dns v1.1.4/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
+go.starlark.net v0.0.0-20190225160109-1174b2613e82 h1:vAHCTDREx7LqPeWqNeTvCKWcURJztP3wBKnF2Q0sW7Q=
+go.starlark.net v0.0.0-20190225160109-1174b2613e82/go.mod h1:c1/X6cHgvdXj6pUlmWKMkuqRnW4K8x2vwt6JAaaircg=
 golang.org/x/crypto v0.0.0-20190208162236-193df9c0f06f h1:ETU2VEl7TnT5bl7IvuKEzTDpplg5wzGYsOCAPhdoEIg=
 golang.org/x/crypto v0.0.0-20190208162236-193df9c0f06f/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -25,7 +29,6 @@ golang.org/x/sys v0.0.0-20180830151530-49385e6e1522 h1:Ve1ORMCxvRmSXBwJK+t3Oy+V2
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc=

infra/conf/router.go

@@ -363,6 +363,7 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		User       *StringList  `json:"user"`
 		InboundTag *StringList  `json:"inboundTag"`
 		Protocols  *StringList  `json:"protocol"`
+		Attributes string       `json:"attrs"`
 	}
 	rawFieldRule := new(RawFieldRule)
 	err := json.Unmarshal(msg, rawFieldRule)
@@ -435,6 +436,10 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		}
 	}
 
+	if len(rawFieldRule.Attributes) > 0 {
+		rule.Attributes = rawFieldRule.Attributes
+	}
+
 	return rule, nil
 }