feat: wasm support body-transformer

plugins/wasm-go/extensions/body-transformer/VERSION

@@ -0,0 +1 @@
+1.0.0

plugins/wasm-go/extensions/body-transformer/go.mod

@@ -0,0 +1,19 @@
+module github.com/alibaba/higress/plugins/wasm-go/extensions/body-transformer
+
+go 1.19
+
+require (
+	github.com/alibaba/higress/plugins/wasm-go v0.0.0-00010101000000-000000000000
+	github.com/tidwall/gjson v1.14.3
+)
+
+require (
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/higress-group/nottinygc v0.0.0-20231101025119-e93c4c2f8520 // indirect
+	github.com/magefile/mage v1.14.0 // indirect
+	github.com/tetratelabs/proxy-wasm-go-sdk v0.19.1-0.20220822060051-f9d179a57f8c // indirect
+	github.com/tidwall/match v1.1.1 // indirect
+	github.com/tidwall/pretty v1.2.0 // indirect
+)
+
+replace github.com/alibaba/higress/plugins/wasm-go => ../..

plugins/wasm-go/extensions/body-transformer/go.sum

@@ -0,0 +1,18 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/higress-group/nottinygc v0.0.0-20231101025119-e93c4c2f8520 h1:IHDghbGQ2DTIXHBHxWfqCYQW1fKjyJ/I7W1pMyUDeEA=
+github.com/higress-group/nottinygc v0.0.0-20231101025119-e93c4c2f8520/go.mod h1:Nz8ORLaFiLWotg6GeKlJMhv8cci8mM43uEnLA5t8iew=
+github.com/magefile/mage v1.14.0 h1:6QDX3g6z1YvJ4olPhT1wksUcSa/V0a1B+pJb73fBjyo=
+github.com/magefile/mage v1.14.0/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
+github.com/tetratelabs/proxy-wasm-go-sdk v0.19.1-0.20220822060051-f9d179a57f8c h1:OCUFXVGixHLfNjg6/QYEhv+jHJ5mRGhpEUVFv9eWPJE=
+github.com/tetratelabs/proxy-wasm-go-sdk v0.19.1-0.20220822060051-f9d179a57f8c/go.mod h1:5t/pWFNJ9eMyu/K/Z+OeGhDJ9sN9eCo8fc2pyM/Qjg4=
+github.com/tidwall/gjson v1.14.3 h1:9jvXn7olKEHU1S9vwoMGliaT8jq1vJ7IH/n9zD9Dnlw=
+github.com/tidwall/gjson v1.14.3/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
+github.com/tidwall/match v1.1.1 h1:+Ho715JplO36QYgwN9PGYNhgZvoUSc9X2c80KVTi+GA=
+github.com/tidwall/match v1.1.1/go.mod h1:eRSPERbgtNPcGhD8UCthc6PmLEQXEWd3PRB5JTxsfmM=
+github.com/tidwall/pretty v1.2.0 h1:RWIZEg2iJ8/g6fDDYzMpobmaoGh5OLl4AXtGUGPcqCs=
+github.com/tidwall/pretty v1.2.0/go.mod h1:ITEVvHYasfjBbM0u2Pg8T2nJnzm8xPwvNhhsoaGGjNU=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

plugins/wasm-go/extensions/body-transformer/main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm"
+	"github.com/tetratelabs/proxy-wasm-go-sdk/proxywasm/types"
+	"github.com/tidwall/gjson"
+)
+
+func main() {
+	wrapper.SetCtx(
+		"body-transformer",
+		wrapper.ParseConfigBy(parseConfig),
+		wrapper.ProcessRequestHeadersBy(onHttpRequestHeaders),
+		wrapper.ProcessRequestBodyBy(onHttpRequestBody),
+		wrapper.ProcessResponseBodyBy(onHttpResponseBody),
+	)
+}
+
+type BodyTransformerConfig struct {
+	reqTemplate string
+	rspTemplate string
+}
+
+func parseConfig(json gjson.Result, config *BodyTransformerConfig, log wrapper.Log) error {
+	return nil
+}
+
+func onHttpResponseBody(ctx wrapper.HttpContext, config BodyTransformerConfig, body []byte, log wrapper.Log) types.Action {
+	decoders(formatParse(ctx))
+	return types.ActionContinue
+}
+
+func onHttpRequestHeaders(ctx wrapper.HttpContext, config BodyTransformerConfig, log wrapper.Log) types.Action {
+	decoders(formatParse(ctx))
+	return types.ActionContinue
+}
+
+func onHttpRequestBody(ctx wrapper.HttpContext, config BodyTransformerConfig, body []byte, log wrapper.Log) types.Action {
+	decoders(formatParse(ctx))
+	return types.ActionContinue
+}
+
+func formatParse(ctx wrapper.HttpContext) string {
+	var f string
+	if ctx.Method() == http.MethodGet {
+		f = "args"
+	}
+
+	cType, _ := proxywasm.GetHttpRequestHeader("Content-Type")
+	if len(f) == 0 && len(cType) != 0 {
+		if cType == "text/xml" {
+			f = "xml"
+		} else if cType == "application/json" {
+			f = "json"
+		} else if cType == "application/x-www-form-urlencoded" {
+			f = "encoded"
+		}
+	}
+	return f
+}
+
+func decoders(format string) {
+	switch format {
+	case "json":
+	case "xml":
+	case "encoded":
+	case "args":
+	}
+}