chore: init

Author: moonrailgun

.traefik.yml

@@ -0,0 +1,11 @@
+# Traefik plugin manifest for tianji plugin
+displayName: Tianji Plugin
+type: middleware
+import: github.com/msgbyte/traefik-tianji-plugin
+
+summary: 'A Traefik plugin for Tianji analytics integration'
+
+testData:
+  forwardPath: _tianji
+  tianjiHost: http://localhost:12345
+  websiteId: "test-website-id"

LICENSE

@@ -0,0 +1,202 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
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+      whether in tort (including negligence), contract, or otherwise,
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+      negligent acts) or agreed to in writing, shall any Contributor be
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+      incidental, or consequential damages of any character arising as a
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+      defend, and hold each Contributor harmless for any liability
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+      of your accepting any such warranty or additional liability.
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+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+   Copyright 2020 Containous SAS
+   Copyright 2020 Traefik Labs
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

Makefile

@@ -0,0 +1,17 @@
+.PHONY: lint test vendor clean
+
+export GO111MODULE=on
+
+default: lint test
+
+test:
+	go test -v -cover ./...
+
+yaegi_test:
+	yaegi test -v .
+
+vendor:
+	go mod vendor
+
+clean:
+	rm -rf ./vendor

forwarding.go

@@ -0,0 +1,154 @@
+package traefik_tianji_plugin
+
+// Copied source from
+// https://github.com/kzmake/traefik-plugin-forward-request/blob/master/util.go
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"strings"
+)
+
+const (
+	xForwardedProto  = "x-forwarded-proto"
+	xForwardedFor    = "x-forwarded-for"
+	xForwardedHost   = "x-forwarded-host"
+	xForwardedPort   = "x-forwarded-port"
+	xForwardedURI    = "x-forwarded-uri"
+	xForwardedMethod = "x-forwarded-method"
+
+	connection         = "connection"
+	keepAlive          = "keep-alive"
+	proxyAuthenticate  = "proxy-authenticate"
+	proxyAuthorization = "proxy-authorization"
+	te                 = "te" // canonicalized version of "TE"
+	trailers           = "trailers"
+	transferEncoding   = "transfer-Encoding"
+	upgrade            = "upgrade"
+)
+
+var hopHeaders = []string{
+	connection,
+	keepAlive,
+	proxyAuthenticate,
+	proxyAuthorization,
+	te, // canonicalized version of "TE"
+	trailers,
+	transferEncoding,
+	upgrade,
+}
+
+func newForwardRequest(req *http.Request, forwardURL string) (*http.Request, error) {
+	drainedBody, body, err := drainBody(req.Body)
+	req.Body = body
+	if err != nil {
+		return nil, err
+	}
+
+	fReq, err := http.NewRequestWithContext(req.Context(), req.Method, forwardURL, drainedBody)
+	if err != nil {
+		return nil, err
+	}
+
+	copyHeaders(fReq.Header, req.Header)
+	removeHeaders(fReq.Header, hopHeaders...)
+	writeXForwardedHeaders(fReq.Header, req)
+
+	return fReq, nil
+}
+
+func drainBody(b io.ReadCloser) (r1, r2 io.ReadCloser, err error) {
+	if b == nil || b == http.NoBody {
+		return http.NoBody, http.NoBody, nil
+	}
+	var buf bytes.Buffer
+	if _, err = buf.ReadFrom(b); err != nil {
+		return nil, b, err
+	}
+	if err := b.Close(); err != nil {
+		return nil, b, err
+	}
+
+	return ioutil.NopCloser(&buf), ioutil.NopCloser(bytes.NewReader(buf.Bytes())), nil
+}
+
+func copyHeaders(dst, src http.Header) {
+	for k, vv := range src {
+		for _, v := range vv {
+			dst.Add(k, v)
+		}
+	}
+}
+
+func removeHeaders(headers http.Header, names ...string) {
+	for _, h := range names {
+		headers.Del(h)
+	}
+}
+
+func writeXForwardedHeaders(dst http.Header, req *http.Request) {
+	if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
+		if values := req.Header.Values(xForwardedFor); len(values) > 0 {
+			clientIP = strings.Join(values, ", ") + ", " + clientIP
+		}
+		dst.Set(xForwardedFor, clientIP)
+	}
+
+	xfm := req.Header.Get(xForwardedMethod)
+	switch {
+	case xfm != "":
+		dst.Set(xForwardedMethod, xfm)
+	case req.Method != "":
+		dst.Set(xForwardedMethod, req.Method)
+	default:
+		dst.Del(xForwardedMethod)
+	}
+
+	xfp := req.Header.Get(xForwardedProto)
+	switch {
+	case xfp != "":
+		dst.Set(xForwardedProto, xfp)
+	case req.TLS != nil:
+		dst.Set(xForwardedProto, "https")
+	default:
+		dst.Set(xForwardedProto, "http")
+	}
+
+	if xfp := req.Header.Get(xForwardedPort); xfp != "" {
+		dst.Set(xForwardedPort, xfp)
+	}
+
+	xfh := req.Header.Get(xForwardedHost)
+	switch {
+	case xfh != "":
+		dst.Set(xForwardedHost, xfh)
+	case req.Host != "":
+		dst.Set(xForwardedHost, req.Host)
+	default:
+		dst.Del(xForwardedHost)
+	}
+
+	xfu := req.Header.Get(xForwardedURI)
+	switch {
+	case xfu != "":
+		dst.Set(xForwardedURI, xfu)
+	case req.URL.RequestURI() != "":
+		dst.Set(xForwardedURI, req.URL.RequestURI())
+	default:
+		dst.Del(xForwardedURI)
+	}
+}
+
+func overrideHeaders(dst, src http.Header, overrideHeaders ...string) {
+	removeHeaders(dst, overrideHeaders...)
+
+	for _, overrideHeader := range overrideHeaders {
+		values := src.Values(overrideHeader)
+		for _, v := range values {
+			dst.Add(overrideHeader, v)
+		}
+	}
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/msgbyte/traefik-tianji-plugin
+
+go 1.19

go.work

@@ -0,0 +1,3 @@
+go 1.19
+
+use .