Complete first naive HTTP proxy implementation

- HTTPS configuration is till missing
- fix a few minor things in other plugins
- cleanup of config to reduce repeating of the same values multiple times

Makefile

@@ -13,7 +13,7 @@ DEBUG_PORT = 2345
 DEBUG_ARGS?= --development-logs=true
 INETMOCK_PLUGINS_DIRECTORY = $(DIR)
 
-.PHONY: clean all format deps compile debug snapshot-release test cli-cover-report html-cover-report plugins $(PLUGINS)
+.PHONY: clean all format deps update-deps compile debug snapshot-release test cli-cover-report html-cover-report plugins $(PLUGINS)
 
 all: clean format compile test plugins
 
@@ -26,9 +26,11 @@ format:
 	@go fmt $(PKGS)
 
 deps:
+	@go build -v $(BUILD_PATH)
+
+update-deps:
 	@go mod tidy
 	@go get -u
-	@go build -v $(BUILD_PATH)
 
 compile: deps
 ifdef DEBUG
@@ -44,7 +46,7 @@ endif
 
 debug:
 	@export INETMOCK_PLUGINS_DIRECTORY
-	@dlv exec $(DIR)$(BINARY_NAME) \
+	dlv exec $(DIR)$(BINARY_NAME) \
 		--headless \
 		--listen=:2345 \
 		--api-version=2 \

config.yaml

@@ -1,75 +0,0 @@
-endpoints:
-  plainHttp:
-    handler: http_mock
-    listenAddress: 0.0.0.0
-    port: 80
-    options:
-      rules:
-        - pattern: ".*\\.(?i)exe"
-          response: ./assets/fakeFiles/sample.exe
-        - pattern: ".*\\.(?i)(jpg|jpeg)"
-          response: ./assets/fakeFiles/default.jpg
-        - pattern: ".*\\.(?i)png"
-          response: ./assets/fakeFiles/default.png
-        - pattern: ".*\\.(?i)gif"
-          response: ./assets/fakeFiles/default.gif
-        - pattern: ".*\\.(?i)ico"
-          response: ./assets/fakeFiles/default.ico
-        - pattern: ".*\\.(?i)txt"
-          response: ./assets/fakeFiles/default.txt
-        - pattern: ".*"
-          response: ./assets/fakeFiles/default.html
-  httpsDowngrade:
-    handler: tls_interceptor
-    listenAddress: 0.0.0.0
-    port: 443
-    options:
-      ecdsaCurve: P256
-      validity:
-        ca:
-          notBeforeRelative: 17520h
-          notAfterRelative: 17520h
-        domain:
-          notBeforeRelative: 168h
-          notAfterRelative: 168h
-      rootCaCert:
-        publicKey: ./ca.pem
-        privateKey: ./ca.key
-      certCachePath: /tmp/inetmock/
-      target:
-        ipAddress: 127.0.0.1
-        port: 80
-  plainDns:
-    handler: dns_mock
-    listenAddress: 0.0.0.0
-    port: 53
-    options:
-      rules:
-        - pattern: ".*\\.google\\.com"
-          response: 1.1.1.1
-        - pattern: ".*\\.reddit\\.com"
-          response: 2.2.2.2
-      fallback:
-        strategy: incremental
-        args:
-          startIP: 10.0.10.0
-  dnsOverTlsDowngrade:
-    handler: tls_interceptor
-    listenAddress: 0.0.0.0
-    port: 853
-    options:
-      ecdsaCurve: P256
-      validity:
-        ca:
-          notBeforeRelative: 17520h
-          notAfterRelative: 17520h
-        domain:
-          notBeforeRelative: 168h
-          notAfterRelative: 168h
-      rootCaCert:
-        publicKey: ./ca.pem
-        privateKey: ./ca.key
-      certCachePath: /tmp/inetmock/
-      target:
-        ipAddress: 127.0.0.1
-        port: 53

config.yaml

@@ -0,0 +1 @@
+mock_config.yaml

mock_config.yaml

@@ -1,61 +1,54 @@
+x-response-rules: &httpResponseRules
+  rules:
+    - pattern: ".*\\.(?i)exe"
+      response: ./assets/fakeFiles/sample.exe
+    - pattern: ".*\\.(?i)(jpg|jpeg)"
+      response: ./assets/fakeFiles/default.jpg
+    - pattern: ".*\\.(?i)png"
+      response: ./assets/fakeFiles/default.png
+    - pattern: ".*\\.(?i)gif"
+      response: ./assets/fakeFiles/default.gif
+    - pattern: ".*\\.(?i)ico"
+      response: ./assets/fakeFiles/default.ico
+    - pattern: ".*\\.(?i)txt"
+      response: ./assets/fakeFiles/default.txt
+    - pattern: ".*"
+      response: ./assets/fakeFiles/default.html
+
+x-tls-options: &tlsOptions
+  ecdsaCurve: P256
+  validity:
+    ca:
+      notBeforeRelative: 17520h
+      notAfterRelative: 17520h
+    domain:
+      notBeforeRelative: 168h
+      notAfterRelative: 168h
+  rootCaCert:
+    publicKey: ./ca.pem
+    privateKey: ./ca.key
+  certCachePath: /tmp/inetmock/
+
 endpoints:
   plainHttp:
     handler: http_mock
     listenAddress: 0.0.0.0
     port: 80
     options:
-      rules:
+      <<: *httpResponseRules
-        - pattern: ".*\\.(?i)exe"
-          response: ./assets/fakeFiles/sample.exe
-        - pattern: ".*\\.(?i)(jpg|jpeg)"
-          response: ./assets/fakeFiles/default.jpg
-        - pattern: ".*\\.(?i)png"
-          response: ./assets/fakeFiles/default.png
-        - pattern: ".*\\.(?i)gif"
-          response: ./assets/fakeFiles/default.gif
-        - pattern: ".*\\.(?i)ico"
-          response: ./assets/fakeFiles/default.ico
-        - pattern: ".*\\.(?i)txt"
-          response: ./assets/fakeFiles/default.txt
-        - pattern: ".*"
-          response: ./assets/fakeFiles/default.html
   proxy:
     handler: http_proxy
     listenAddress: 0.0.0.0
     port: 3128
     options:
-      rules:
+      fallback: notfound
-        - pattern: ".*\\.(?i)exe"
+      <<: *httpResponseRules
-          response: ./assets/fakeFiles/sample.exe
-        - pattern: ".*\\.(?i)(jpg|jpeg)"
-          response: ./assets/fakeFiles/default.jpg
-        - pattern: ".*\\.(?i)png"
-          response: ./assets/fakeFiles/default.png
-        - pattern: ".*\\.(?i)gif"
-          response: ./assets/fakeFiles/default.gif
-        - pattern: ".*\\.(?i)ico"
-          response: ./assets/fakeFiles/default.ico
-        - pattern: ".*\\.(?i)txt"
-          response: ./assets/fakeFiles/default.txt
-        - pattern: ".*"
-          response: ./assets/fakeFiles/default.html
   httpsDowngrade:
     handler: tls_interceptor
     listenAddress: 0.0.0.0
     port: 443
     options:
-      ecdsaCurve: P256
+      <<: *tlsOptions
-      validity:
-        ca:
-          notBeforeRelative: 17520h
-          notAfterRelative: 17520h
-        domain:
-          notBeforeRelative: 168h
-          notAfterRelative: 168h
-      rootCaCert:
-        publicKey: ./ca.pem
-        privateKey: ./ca.key
-      certCachePath: /tmp/inetmock/
       target:
         ipAddress: 127.0.0.1
         port: 80
@@ -78,18 +71,7 @@ endpoints:
     listenAddress: 0.0.0.0
     port: 853
     options:
-      ecdsaCurve: P256
+      <<: *tlsOptions
-      validity:
-        ca:
-          notBeforeRelative: 17520h
-          notAfterRelative: 17520h
-        domain:
-          notBeforeRelative: 168h
-          notAfterRelative: 168h
-      rootCaCert:
-        publicKey: ./ca.pem
-        privateKey: ./ca.key
-      certCachePath: /tmp/inetmock/
       target:
         ipAddress: 127.0.0.1
         port: 53

plugins/dns_mock/Makefile

@@ -10,14 +10,16 @@ PLUGIN_NAME = $(shell basename $(DIR)).so
 OUT_DIR = $(DIR)../../
 DEBUG_PORT = 2345
 
-.PHONY: deps format compile test cli-cover-report html-cover-report
+.PHONY: deps update-deps format compile test cli-cover-report html-cover-report
 
 all: format compile test
 
 deps:
+	@go build -buildmode=plugin -v $(DIR)...
+
+update-deps:
 	@go mod tidy
 	@go get -u
-	@go build -buildmode=plugin -v $(DIR)...
 
 format:
 	@go fmt $(PKGS)

plugins/dns_mock/fake_main.go

@@ -1,5 +0,0 @@
-package main
-
-func main() {
-	panic("should not every be called")
-}

plugins/dns_mock/main.go

@@ -63,6 +63,7 @@ func (d *dnsHandler) startServer(dnsServer *dns.Server) {
 }
 
 func (d *dnsHandler) Shutdown(wg *sync.WaitGroup) {
+	d.logger.Info("shutting down DNS mock")
 	for _, dnsServer := range d.dnsServer {
 		if err := dnsServer.Shutdown(); err != nil {
 			d.logger.Error(

plugins/http_mock/Makefile

@@ -10,14 +10,16 @@ PLUGIN_NAME = $(shell basename $(DIR)).so
 OUT_DIR = $(DIR)../../
 DEBUG_PORT = 2345
 
-.PHONY: deps format compile test cli-cover-report html-cover-report
+.PHONY: deps update-deps format compile test cli-cover-report html-cover-report
 
 all: format compile test
 
 deps:
+	@go build -buildmode=plugin -v $(DIR)...
+
+update-deps:
 	@go mod tidy
 	@go get -u
-	@go build -buildmode=plugin -v $(DIR)...
 
 format:
 	@go fmt $(PKGS)
@@ -30,7 +32,7 @@ ifdef DEBUG
 else ifdef CONTAINER
 	@$(GOARGS) go build $(GO_CONTAINER_BUILD_ARGS) -o $(OUT_DIR)/$(PLUGIN_NAME) $(DIR)
 else
-	@$(GOARGS) go build $(GO_BUILD_ARGS) -o $(OUT_DIR)/$(PLUGIN_NAMEs) $(DIR)
+	@$(GOARGS) go build $(GO_BUILD_ARGS) -o $(OUT_DIR)/$(PLUGIN_NAME) $(DIR)
 endif
 
 test:

plugins/http_mock/fake_main.go

@@ -1,5 +0,0 @@
-package main
-
-func main() {
-	panic("should not every be called")
-}

plugins/http_mock/http_handler.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"bytes"
+	"go.uber.org/zap"
+	"net/http"
+)
+
+func (p *httpHandler) setupRoute(rule targetRule) {
+	p.logger.Info(
+		"setup routing",
+		zap.String("route", rule.Pattern().String()),
+		zap.String("response", rule.Response()),
+	)
+
+	p.router.Handler(rule.Pattern(), createHandlerForTarget(p.logger, rule.response))
+}
+
+func createHandlerForTarget(logger *zap.Logger, targetPath string) http.Handler {
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		headerWriter := &bytes.Buffer{}
+		request.Header.Write(headerWriter)
+
+		logger.Info(
+			"Handling request",
+			zap.String("source", request.RemoteAddr),
+			zap.String("host", request.Host),
+			zap.String("method", request.Method),
+			zap.String("protocol", request.Proto),
+			zap.String("path", request.RequestURI),
+			zap.String("response", targetPath),
+			zap.Reflect("headers", request.Header),
+		)
+
+		http.ServeFile(writer, request, targetPath)
+	})
+}

plugins/http_mock/main.go

@@ -1,13 +1,10 @@
 package main
 
 import (
-	"bytes"
 	"fmt"
 	"github.com/baez90/inetmock/internal/config"
-	"github.com/baez90/inetmock/pkg/path"
 	"go.uber.org/zap"
 	"net/http"
-	"path/filepath"
 	"sync"
 )
 
@@ -37,6 +34,7 @@ func (p *httpHandler) Run(config config.HandlerConfig) {
 }
 
 func (p *httpHandler) Shutdown(wg *sync.WaitGroup) {
+	p.logger.Info("Shutting down HTTP mock")
 	if err := p.server.Close(); err != nil {
 		p.logger.Error(
 			"failed to shutdown HTTP server",
@@ -55,35 +53,3 @@ func (p *httpHandler) startServer() {
 		)
 	}
 }
-
-func (p *httpHandler) setupRoute(rule targetRule) {
-	p.logger.Info(
-		"setup routing",
-		zap.String("route", rule.Pattern().String()),
-		zap.String("response", rule.Response()),
-	)
-
-	p.router.Handler(rule.Pattern(), createHandlerForTarget(p.logger, rule.response))
-}
-
-func createHandlerForTarget(logger *zap.Logger, targetPath string) http.Handler {
-	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
-		targetFilePath := filepath.Join(path.WorkingDirectory(), targetPath)
-
-		headerWriter := &bytes.Buffer{}
-		request.Header.Write(headerWriter)
-
-		logger.Info(
-			"Handling request",
-			zap.String("source", request.RemoteAddr),
-			zap.String("host", request.Host),
-			zap.String("method", request.Method),
-			zap.String("protocol", request.Proto),
-			zap.String("path", request.RequestURI),
-			zap.String("response", targetFilePath),
-			zap.Reflect("headers", request.Header),
-		)
-
-		http.ServeFile(writer, request, targetFilePath)
-	})
-}

plugins/http_mock/protocol_options.go

@@ -28,8 +28,7 @@ type httpOptions struct {
 	Rules []targetRule
 }
 
-func loadFromConfig(config *viper.Viper) httpOptions {
+func loadFromConfig(config *viper.Viper) (options httpOptions) {
-	options := httpOptions{}
 	anonRules := config.Get(rulesConfigKey).([]interface{})
 
 	for _, i := range anonRules {
@@ -45,5 +44,5 @@ func loadFromConfig(config *viper.Viper) httpOptions {
 		}
 	}
 
-	return options
+	return
 }

plugins/http_proxy/Makefile

@@ -10,14 +10,16 @@ PLUGIN_NAME = $(shell basename $(DIR)).so
 OUT_DIR = $(DIR)../../
 DEBUG_PORT = 2345
 
-.PHONY: deps format compile test cli-cover-report html-cover-report
+.PHONY: deps update-deps format compile test cli-cover-report html-cover-report
 
 all: format compile test
 
 deps:
+	@go build -buildmode=plugin -v $(DIR)...
+
+update-deps:
 	@go mod tidy
 	@go get -u
-	@go build -buildmode=plugin -v $(DIR)...
 
 format:
 	@go fmt $(PKGS)

plugins/http_proxy/fake_main.go

@@ -1,5 +0,0 @@
-package main
-
-func main() {
-	panic("should not every be called")
-}

plugins/http_proxy/fallback.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"gopkg.in/elazarl/goproxy.v1"
+	"net/http"
+)
+
+const (
+	passthroughStrategyName = "passthrough"
+	notFoundStrategyName    = "notfound"
+)
+
+var (
+	fallbackStrategies map[string]ProxyFallbackStrategy
+)
+
+func init() {
+	fallbackStrategies = map[string]ProxyFallbackStrategy{
+		passthroughStrategyName: &passthroughFallbackStrategy{},
+		notFoundStrategyName:    &notFoundFallbackStrategy{},
+	}
+}
+
+func StrategyForName(name string) ProxyFallbackStrategy {
+	if strategy, ok := fallbackStrategies[name]; ok {
+		return strategy
+	}
+	return fallbackStrategies[notFoundStrategyName]
+}
+
+type ProxyFallbackStrategy interface {
+	Apply(request *http.Request) (*http.Response, error)
+}
+
+type passthroughFallbackStrategy struct {
+}
+
+func (p passthroughFallbackStrategy) Apply(request *http.Request) (*http.Response, error) {
+	return nil, nil
+}
+
+type notFoundFallbackStrategy struct {
+}
+
+func (n notFoundFallbackStrategy) Apply(request *http.Request) (response *http.Response, err error) {
+	response = goproxy.NewResponse(
+		request,
+		goproxy.ContentTypeText,
+		http.StatusNotFound,
+		"The requested resource was not found",
+	)
+	return
+}

plugins/http_proxy/go.mod

@@ -4,7 +4,10 @@ go 1.14
 
 require (
 	github.com/baez90/inetmock v0.0.1
+	github.com/elazarl/goproxy v0.0.0-20200315184450-1f3cb6622dad
+	github.com/spf13/viper v1.6.3
 	go.uber.org/zap v1.14.1
+	gopkg.in/elazarl/goproxy.v1 v1.0.0-20180725130230-947c36da3153
 )
 
 replace github.com/baez90/inetmock v0.0.1 => ../../

plugins/http_proxy/go.sum

@@ -21,6 +21,10 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
+github.com/elazarl/goproxy v0.0.0-20200315184450-1f3cb6622dad h1:zPs0fNF2Io1Qytf92EI2CDJ9oCXZr+NmjEVexrUEdq4=
+github.com/elazarl/goproxy v0.0.0-20200315184450-1f3cb6622dad/go.mod h1:Ro8st/ElPeALwNFlcTpWmkr6IoMFfkjXAvTHpevnDsM=
+github.com/elazarl/goproxy/ext v0.0.0-20190711103511-473e67f1d7d2 h1:dWB6v3RcOy03t/bUadywsbyrQwCqZeNIEX6M1OtSZOM=
+github.com/elazarl/goproxy/ext v0.0.0-20190711103511-473e67f1d7d2/go.mod h1:gNh8nYJoAm43RfaxurUnxr+N1PwuFV3ZMl/efxlIlY8=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
@@ -48,6 +52,7 @@ github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgf
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
@@ -94,6 +99,7 @@ github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R
 github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
+github.com/rogpeppe/go-charset v0.0.0-20180617210344-2471d30d28b4/go.mod h1:qgYeAmZ5ZIpBWTGllZSQnw97Dj+woV0toclVaRGI8pc=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
@@ -110,6 +116,7 @@ github.com/spf13/afero v1.2.2/go.mod h1:9ZxEEn6pIJ8Rxe320qSDBk6AsU0r9pR7Q4OcevTd
 github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
 github.com/spf13/cast v1.3.1 h1:nFm6S0SMdyzrzcmThSipiEubIDy8WEXKNZ0UOgiRpng=
 github.com/spf13/cast v1.3.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
+github.com/spf13/cobra v1.0.0 h1:6m/oheQuQ13N9ks4hubMG6BnvwOeaJrqSPLahSnczz8=
 github.com/spf13/cobra v1.0.0/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHNrgE=
 github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
 github.com/spf13/jwalterweatherman v1.1.0 h1:ue6voC5bR5F8YxI5S67j9i582FU4Qvo2bmqnqMYADFk=
@@ -199,6 +206,8 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/elazarl/goproxy.v1 v1.0.0-20180725130230-947c36da3153 h1:i2sumy6EgvN2dbX7HPhoDc7hLyoym3OYdU5HlvUUrpE=
+gopkg.in/elazarl/goproxy.v1 v1.0.0-20180725130230-947c36da3153/go.mod h1:xzjpkyedLMz3EXUTBbkRuuGPsxfsBX3Sy7J6kC9Gvoc=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.55.0 h1:E8yzL5unfpW3M6fz/eB7Cb5MQAYSZ7GKo4Qth+N2sgQ=

plugins/http_proxy/init.go

@@ -1,8 +1,11 @@
 package main
 
 import (
+	"github.com/baez90/inetmock/internal/plugins"
+	"github.com/baez90/inetmock/pkg/api"
 	"github.com/baez90/inetmock/pkg/logging"
 	"go.uber.org/zap"
+	"gopkg.in/elazarl/goproxy.v1"
 )
 
 func init() {
@@ -10,4 +13,11 @@ func init() {
 	logger = logger.With(
 		zap.String("ProtocolHandler", name),
 	)
+
+	plugins.Registry().RegisterHandler(name, func() api.ProtocolHandler {
+		return &httpProxy{
+			logger: logger,
+			proxy:  goproxy.NewProxyHttpServer(),
+		}
+	})
 }

plugins/http_proxy/main.go

@@ -1,8 +1,11 @@
 package main
 
 import (
+	"fmt"
 	"github.com/baez90/inetmock/internal/config"
 	"go.uber.org/zap"
+	"gopkg.in/elazarl/goproxy.v1"
+	"net/http"
 	"sync"
 )
 
@@ -12,12 +15,43 @@ const (
 
 type httpProxy struct {
 	logger *zap.Logger
+	proxy  *goproxy.ProxyHttpServer
+	server *http.Server
 }
 
-func (h httpProxy) Run(config config.HandlerConfig) {
+func (h *httpProxy) Run(config config.HandlerConfig) {
-	panic("implement me")
+	options := loadFromConfig(config.Options())
+	addr := fmt.Sprintf("%s:%d", config.ListenAddress(), config.Port())
+	h.server = &http.Server{Addr: addr, Handler: h.proxy}
+	h.logger = h.logger.With(
+		zap.String("address", addr),
+	)
+
+	proxyHandler := &proxyHttpHandler{
+		options: options,
+		logger:  h.logger,
+	}
+	h.proxy.OnRequest().Do(proxyHandler)
+	h.proxy.OnRequest().HandleConnect()
+	go h.startProxy()
 }
 
-func (h httpProxy) Shutdown(wg *sync.WaitGroup) {
+func (h *httpProxy) startProxy() {
-	panic("implement me")
+	if err := h.server.ListenAndServe(); err != nil {
+		h.logger.Error(
+			"failed to start proxy server",
+			zap.Error(err),
+		)
+	}
+}
+
+func (h *httpProxy) Shutdown(wg *sync.WaitGroup) {
+	defer wg.Done()
+	h.logger.Info("Shutting down HTTP proxy")
+	if err := h.server.Close(); err != nil {
+		h.logger.Error(
+			"failed to shutdown proxy endpoint",
+			zap.Error(err),
+		)
+	}
 }

plugins/http_proxy/protocol_options.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"github.com/spf13/viper"
+	"regexp"
+)
+
+const (
+	rulesConfigKey            = "rules"
+	patternConfigKey          = "pattern"
+	responseConfigKey         = "response"
+	fallbackStrategyConfigKey = "fallback"
+)
+
+type targetRule struct {
+	pattern  *regexp.Regexp
+	response string
+}
+
+func (tr targetRule) Pattern() *regexp.Regexp {
+	return tr.pattern
+}
+
+func (tr targetRule) Response() string {
+	return tr.response
+}
+
+type httpProxyOptions struct {
+	Rules            []targetRule
+	FallbackStrategy ProxyFallbackStrategy
+}
+
+func loadFromConfig(config *viper.Viper) (options httpProxyOptions) {
+	options.FallbackStrategy = StrategyForName(config.GetString(fallbackStrategyConfigKey))
+
+	anonRules := config.Get(rulesConfigKey).([]interface{})
+
+	for _, i := range anonRules {
+		innerData := i.(map[interface{}]interface{})
+
+		if rulePattern, err := regexp.Compile(innerData[patternConfigKey].(string)); err == nil {
+			options.Rules = append(options.Rules, targetRule{
+				pattern:  rulePattern,
+				response: innerData[responseConfigKey].(string),
+			})
+		} else {
+			panic(err)
+		}
+	}
+
+	return
+}

plugins/http_proxy/proxy_handler.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"go.uber.org/zap"
+	"gopkg.in/elazarl/goproxy.v1"
+	"io"
+	"mime"
+	"net/http"
+	"os"
+	"path/filepath"
+)
+
+type proxyHttpHandler struct {
+	options httpProxyOptions
+	logger  *zap.Logger
+}
+
+/*
+TODO implement HTTPS proxy like in TLS interceptor
+func (p *proxyHttpHandler) HandleConnect(req string, ctx *goproxy.ProxyCtx) (*goproxy.ConnectAction, string) {
+	return &goproxy.ConnectAction{
+		Action: goproxy.OkConnect,
+
+	}, ""
+}*/
+
+func (p *proxyHttpHandler) Handle(req *http.Request, _ *goproxy.ProxyCtx) (retReq *http.Request, resp *http.Response) {
+
+	retReq = req
+	resp = &http.Response{
+		Request:          req,
+		TransferEncoding: req.TransferEncoding,
+		Header:           make(http.Header),
+		StatusCode:       http.StatusOK,
+	}
+
+	p.logger.Info(
+		"Handling request",
+		zap.String("source", req.RemoteAddr),
+		zap.String("host", req.Host),
+		zap.String("method", req.Method),
+		zap.String("protocol", req.Proto),
+		zap.String("path", req.RequestURI),
+		zap.Reflect("headers", req.Header),
+	)
+
+	for _, rule := range p.options.Rules {
+		if rule.pattern.MatchString(req.URL.Path) {
+			if file, err := os.Open(rule.response); err != nil {
+				p.logger.Error(
+					"failed to open response target file",
+					zap.String("resonse", rule.response),
+					zap.Error(err),
+				)
+				continue
+			} else {
+				resp.Body = file
+
+				if stat, err := file.Stat(); err == nil {
+					resp.ContentLength = stat.Size()
+				}
+
+				if contentType, err := GetContentType(rule, file); err == nil {
+					resp.Header["Content-Type"] = []string{contentType}
+				}
+
+				p.logger.Info("returning fake response from rules")
+				return req, resp
+			}
+		}
+	}
+
+	if resp, err := p.options.FallbackStrategy.Apply(req); err != nil {
+		p.logger.Error(
+			"failed to apply fallback strategy",
+			zap.Error(err),
+		)
+	} else {
+		p.logger.Info("returning fake response from fallback strategy")
+		return req, resp
+	}
+
+	p.logger.Info("falling back to proxying request through")
+	return req, nil
+}
+
+func GetContentType(rule targetRule, file *os.File) (contentType string, err error) {
+	if contentType = mime.TypeByExtension(filepath.Ext(rule.response)); contentType != "" {
+		return
+	}
+
+	var buf [512]byte
+
+	n, _ := io.ReadFull(file, buf[:])
+
+	contentType = http.DetectContentType(buf[:n])
+	_, err = file.Seek(0, io.SeekStart)
+	return
+}

plugins/tls_interceptor/Makefile

@@ -10,14 +10,16 @@ PLUGIN_NAME = $(shell basename $(DIR)).so
 OUT_DIR = $(DIR)../../
 DEBUG_PORT = 2345
 
-.PHONY: deps format compile test cli-cover-report html-cover-report
+.PHONY: deps update-deps format compile test cli-cover-report html-cover-report
 
 all: format compile test
 
 deps:
+	@go build -buildmode=plugin -v $(DIR)...
+
+update-deps:
 	@go mod tidy
 	@go get -u
-	@go build -buildmode=plugin -v $(DIR)...
 
 format:
 	@go fmt $(PKGS)

plugins/tls_interceptor/fake_main.go

@@ -1,5 +0,0 @@
-package main
-
-func main() {
-	panic("should not every be called")
-}

plugins/tls_interceptor/main.go

@@ -68,6 +68,7 @@ func (t *tlsInterceptor) Run(config config.HandlerConfig) {
 }
 
 func (t *tlsInterceptor) Shutdown(wg *sync.WaitGroup) {
+	t.logger.Info("Shutting down TLS interceptor")
 	t.shutdownRequested = true
 	done := make(chan struct{})
 	go func() {

proxy_config.yaml

@@ -0,0 +1,77 @@
+endpoints:
+  plainHttp:
+    handler: http_proxy
+    listenAddress: 0.0.0.0
+    port: 80
+    options:
+      rules:
+        - pattern: ".*\\.(?i)exe"
+          response: ./assets/fakeFiles/sample.exe
+        - pattern: ".*\\.(?i)(jpg|jpeg)"
+          response: ./assets/fakeFiles/default.jpg
+        - pattern: ".*\\.(?i)png"
+          response: ./assets/fakeFiles/default.png
+        - pattern: ".*\\.(?i)gif"
+          response: ./assets/fakeFiles/default.gif
+        - pattern: ".*\\.(?i)ico"
+          response: ./assets/fakeFiles/default.ico
+        - pattern: ".*\\.(?i)txt"
+          response: ./assets/fakeFiles/default.txt
+        - pattern: ".*"
+          response: ./assets/fakeFiles/default.html
+  httpsDowngrade:
+    handler: tls_interceptor
+    listenAddress: 0.0.0.0
+    port: 443
+    options:
+      ecdsaCurve: P256
+      validity:
+        ca:
+          notBeforeRelative: 17520h
+          notAfterRelative: 17520h
+        domain:
+          notBeforeRelative: 168h
+          notAfterRelative: 168h
+      rootCaCert:
+        publicKey: ./ca.pem
+        privateKey: ./ca.key
+      certCachePath: /tmp/inetmock/
+      target:
+        ipAddress: 127.0.0.1
+        port: 80
+  plainDns:
+    handler: dns_mock
+    listenAddress: 0.0.0.0
+    port: 53
+    options:
+      rules:
+        - pattern: "www.golem.de"
+          response: 77.247.84.129
+        - pattern: ".*\\.google\\.com"
+          response: 1.1.1.1
+        - pattern: ".*\\.reddit\\.com"
+          response: 2.2.2.2
+      fallback:
+        strategy: incremental
+        args:
+          startIP: 10.0.0.0
+  dnsOverTlsDowngrade:
+    handler: tls_interceptor
+    listenAddress: 0.0.0.0
+    port: 853
+    options:
+      ecdsaCurve: P256
+      validity:
+        ca:
+          notBeforeRelative: 17520h
+          notAfterRelative: 17520h
+        domain:
+          notBeforeRelative: 168h
+          notAfterRelative: 168h
+      rootCaCert:
+        publicKey: ./ca.pem
+        privateKey: ./ca.key
+      certCachePath: /tmp/inetmock/
+      target:
+        ipAddress: 127.0.0.1
+        port: 53