Support TinyGo SDK for extension toolkit (#104)

Signed-off-by: Takeshi Yoneda <[email protected]>

Author: mathetake

Makefile

@@ -15,7 +15,7 @@
 ENVOY = standard:1.11.1
 HUB ?= docker.io/getenvoy
 GETENVOY_TAG ?= dev
-BUILDERS_LANGS := rust
+BUILDERS_LANGS := rust tinygo
 BUILDERS_TAG ?= latest
 EXTRA_TAG ?=
 
@@ -139,7 +139,7 @@ builder/$(1):
 	$(if $(USE_DOCKER_BUILDKIT_CACHE),--build-arg BUILDKIT_INLINE_CACHE=1,)                                                         \
 	$(if $(USE_DOCKER_BUILDKIT_CACHE),--cache-from $(call EXTENSION_BUILDER_IMAGE,$(1),$(EXTENSION_BUILDER_IMAGE_LATEST_VERSION)),) \
 	-t $(call EXTENSION_BUILDER_IMAGE,$(1),$(BUILDERS_TAG))                                                                         \
-	images/extension-builders/$(1)
+	-f images/extension-builders/$(1)/Dockerfile images/extension-builders
 endef
 $(foreach lang,$(BUILDERS_LANGS),$(eval $(call GEN_BUILD_EXTENSION_BUILDER_IMAGE_TARGET,$(lang))))
 

data/extension/init/templates/tinygo/envoy.access_loggers/default/.gitignore

@@ -0,0 +1 @@
+/build/

data/extension/init/templates/tinygo/envoy.access_loggers/default/go.mod

@@ -0,0 +1,8 @@
+module {{ .Extension.Name }}
+
+go 1.15
+
+require (
+	github.com/stretchr/testify v1.6.1
+	github.com/tetratelabs/proxy-wasm-go-sdk v0.1.0
+)

data/extension/init/templates/tinygo/envoy.access_loggers/default/go.sum

@@ -0,0 +1,13 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/tetratelabs/proxy-wasm-go-sdk v0.1.0 h1:9CUaOB8CZInfG/VRCjOEOkzS4JLkri/weqogwmrl2a0=
+github.com/tetratelabs/proxy-wasm-go-sdk v0.1.0/go.mod h1:y1ZQT4bQEBnR8Do4nSOzb3roczzPvcAp8UrF6NEYWNY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

data/extension/init/templates/tinygo/envoy.access_loggers/default/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm"
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm/types"
+)
+
+func main() {
+	proxywasm.SetNewRootContext(newAccessLogger)
+}
+
+type accessLogger struct {
+	// You'd better embed the default root context
+	// so that you don't need to reimplement all the methods by yourself.
+	proxywasm.DefaultRootContext
+	logMessage string
+}
+
+func newAccessLogger(contextID uint32) proxywasm.RootContext {
+	return &accessLogger{}
+}
+
+// Override proxywasm.DefaultRootContext
+func (l *accessLogger) OnPluginStart(configurationSize int) types.OnPluginStartStatus {
+	// Read plugin configuration provided in Envoy configuration.
+	data, err := proxywasm.GetPluginConfiguration(configurationSize)
+	if err != nil && err != types.ErrorStatusNotFound {
+		proxywasm.LogCriticalf("failed to load config: %v", err)
+		return types.OnPluginStartStatusFailed
+	}
+	l.logMessage = string(data)
+	return types.OnPluginStartStatusOK
+}
+
+// Override proxywasm.DefaultRootContext
+func (l *accessLogger) OnLog() {
+	hdr, err := proxywasm.GetHttpRequestHeader(":path")
+	if err != nil {
+		proxywasm.LogCritical(err.Error())
+		return
+	}
+
+	proxywasm.LogInfof(":path = %s", hdr)
+	proxywasm.LogInfof("message = %s", l.logMessage)
+
+}

data/extension/init/templates/tinygo/envoy.access_loggers/default/main_test.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxytest"
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm/types"
+)
+
+func TestAccessLogger_OnLog(t *testing.T) {
+	configuration := `this is my log message`
+	opt := proxytest.NewEmulatorOption().
+		WithNewRootContext(newAccessLogger).
+		WithPluginConfiguration([]byte(configuration))
+
+	host := proxytest.NewHostEmulator(opt)
+	// Release the host emulation lock so that other test cases can insert their own host emulation.
+	defer host.Done()
+
+	// Call OnPluginStart -> the message field of root context is configured.
+	status := host.StartPlugin()
+	// Check the status returned by OnPluginStart is OK.
+	require.Equal(t, types.OnPluginStartStatusOK, status)
+
+	// Call OnLog with the given headers.
+	host.CallOnLogForAccessLogger(types.Headers{
+		{":path", "/this/is/path"},
+	}, nil)
+
+	// Check the Envoy logs.
+	logs := host.GetLogs(types.LogLevelInfo)
+	require.Contains(t, logs, ":path = /this/is/path")
+	require.Contains(t, logs, "message = this is my log message")
+}

data/extension/init/templates/tinygo/envoy.filters.http/default/.gitignore

@@ -0,0 +1 @@
+/build/

data/extension/init/templates/tinygo/envoy.filters.http/default/go.mod

@@ -0,0 +1,8 @@
+module {{ .Extension.Name }}
+
+go 1.15
+
+require (
+	github.com/stretchr/testify v1.6.1
+	github.com/tetratelabs/proxy-wasm-go-sdk v0.1.0
+)

data/extension/init/templates/tinygo/envoy.filters.http/default/go.sum

@@ -0,0 +1,13 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/tetratelabs/proxy-wasm-go-sdk v0.1.0 h1:9CUaOB8CZInfG/VRCjOEOkzS4JLkri/weqogwmrl2a0=
+github.com/tetratelabs/proxy-wasm-go-sdk v0.1.0/go.mod h1:y1ZQT4bQEBnR8Do4nSOzb3roczzPvcAp8UrF6NEYWNY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

data/extension/init/templates/tinygo/envoy.filters.http/default/main.go

@@ -0,0 +1,98 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"strings"
+
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm"
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm/types"
+)
+
+var (
+	requestCounterName = "my_http_filter.request_counter"
+	counter            proxywasm.MetricCounter
+)
+
+func main() {
+	proxywasm.SetNewRootContext(newRootContext)
+}
+
+type rootContext struct {
+	// You'd better embed the default root context
+	// so that you don't need to reimplement all the methods by yourself.
+	proxywasm.DefaultRootContext
+	contextID         uint32
+	additionalHeaders map[string]string
+}
+
+func newRootContext(rootContextID uint32) proxywasm.RootContext {
+	return &rootContext{contextID: rootContextID, additionalHeaders: map[string]string{"additional": "header"}}
+}
+
+// Override proxywasm.DefaultRootContext
+func (ctx *rootContext) OnPluginStart(configurationSize int) types.OnPluginStartStatus {
+	// Initialize the counter.
+	counter = proxywasm.DefineCounterMetric(requestCounterName)
+
+	// Read plugin configuration provided in Envoy configuration.
+	data, err := proxywasm.GetPluginConfiguration(configurationSize)
+	if err != nil && err != types.ErrorStatusNotFound {
+		proxywasm.LogCriticalf("failed to load config: %v", err)
+		return types.OnPluginStartStatusFailed
+	}
+
+	// Each line in the configuration is in the "KEY=VALUE" format.
+	scanner := bufio.NewScanner(bytes.NewReader(data))
+	for scanner.Scan() {
+		tokens := strings.Split(scanner.Text(), "=")
+		ctx.additionalHeaders[tokens[0]] = tokens[1]
+	}
+	return types.OnPluginStartStatusOK
+}
+
+// Override proxywasm.DefaultRootContext
+func (ctx *rootContext) NewHttpContext(uint32) proxywasm.HttpContext {
+	return &httpContext{additionalHeaders: ctx.additionalHeaders}
+}
+
+type httpContext struct {
+	// You'd better embed the default http context
+	// so that you don't need to reimplement all the methods by yourself.
+	proxywasm.DefaultHttpContext
+	additionalHeaders map[string]string
+}
+
+// Override proxywasm.DefaultHttpContext
+func (ctx *httpContext) OnHttpRequestHeaders(numHeaders int, endOfStream bool) types.Action {
+	hs, err := proxywasm.GetHttpRequestHeaders()
+	if err != nil {
+		proxywasm.LogCriticalf("failed to get request headers: %v", err)
+		return types.ActionPause
+	}
+
+	proxywasm.LogInfo("observing request headers")
+	for _, h := range hs {
+		proxywasm.LogInfof("%s: %s", h[0], h[1])
+	}
+
+	return types.ActionContinue
+}
+
+// Override proxywasm.DefaultHttpContext
+func (ctx *httpContext) OnHttpResponseHeaders(numHeaders int, endOfStream bool) types.Action {
+	// Set additional headers in the response.
+	for key, value := range ctx.additionalHeaders {
+		if err := proxywasm.SetHttpResponseHeader(key, value); err != nil {
+			proxywasm.LogCriticalf("failed to add header: %v", err)
+			return types.ActionPause
+		}
+		proxywasm.LogInfof("header set: %s=%s", key, value)
+	}
+	return types.ActionContinue
+}
+
+// Override proxywasm.DefaultHttpContext
+func (ctx *httpContext) OnHttpStreamDone() {
+	counter.Increment(1)
+}