/*
Copyright 2014 The Kubernetes Authors.
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.
*/
package proxy
import (
"bytes"
"compress/flate"
"compress/gzip"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"net/url"
"strings"
"testing"
)
func parseURLOrDie(inURL string) *url.URL {
parsed, err := url.Parse(inURL)
if err != nil {
panic(err)
}
return parsed
}
func TestProxyTransport(t *testing.T) {
testTransport := &Transport{
Scheme: "http",
Host: "foo.com",
PathPrepend: "/proxy/node/node1:10250",
}
testTransport2 := &Transport{
Scheme: "https",
Host: "foo.com",
PathPrepend: "/proxy/node/node1:8080",
}
emptyHostTransport := &Transport{
Scheme: "https",
PathPrepend: "/proxy/node/node1:10250",
}
emptySchemeTransport := &Transport{
Host: "foo.com",
PathPrepend: "/proxy/node/node1:10250",
}
emptyHostAndSchemeTransport := &Transport{
PathPrepend: "/proxy/node/node1:10250",
}
type Item struct {
input string
sourceURL string
transport *Transport
output string
contentType string
forwardedURI string
redirect string
redirectWant string
reqHost string
}
table := map[string]Item{
"normal": {
input: `kubelet.loggoogle.log
`,
sourceURL: "http://mynode.com/logs/log.log",
transport: testTransport,
output: `kubelet.loggoogle.log
`,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"full document": {
input: `kubelet.loggoogle.log
`,
sourceURL: "http://mynode.com/logs/log.log",
transport: testTransport,
output: `kubelet.loggoogle.log
`,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"trailing slash": {
input: `kubelet.loggoogle.log
`,
sourceURL: "http://mynode.com/logs/log.log",
transport: testTransport,
output: `kubelet.loggoogle.log
`,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"content-type charset": {
input: `kubelet.loggoogle.log
`,
sourceURL: "http://mynode.com/logs/log.log",
transport: testTransport,
output: `kubelet.loggoogle.log
`,
contentType: "text/html; charset=utf-8",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"content-type passthrough": {
input: `kubelet.loggoogle.log
`,
sourceURL: "http://mynode.com/logs/log.log",
transport: testTransport,
output: `kubelet.loggoogle.log
`,
contentType: "text/plain",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"subdir": {
input: `kubelet.loggoogle.log`,
sourceURL: "http://mynode.com/whatever/apt/somelog.log",
transport: testTransport2,
output: `kubelet.loggoogle.log`,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:8080/whatever/apt/somelog.log",
},
"image": {
input: `
`,
sourceURL: "http://mynode.com/",
transport: testTransport,
output: `
`,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/",
},
"abs": {
input: ``,
sourceURL: "http://mynode.com/any/path/",
transport: testTransport,
output: ``,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/any/path/",
},
"abs but same host": {
input: ``,
sourceURL: "http://mynode.com/any/path/",
transport: testTransport,
output: ``,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/any/path/",
},
"redirect rel": {
sourceURL: "http://mynode.com/redirect",
transport: testTransport,
redirect: "/redirected/target/",
redirectWant: "http://foo.com/proxy/node/node1:10250/redirected/target/",
forwardedURI: "/proxy/node/node1:10250/redirect",
},
"redirect abs same host": {
sourceURL: "http://mynode.com/redirect",
transport: testTransport,
redirect: "http://mynode.com/redirected/target/",
redirectWant: "http://foo.com/proxy/node/node1:10250/redirected/target/",
forwardedURI: "/proxy/node/node1:10250/redirect",
},
"redirect abs other host": {
sourceURL: "http://mynode.com/redirect",
transport: testTransport,
redirect: "http://example.com/redirected/target/",
redirectWant: "http://example.com/redirected/target/",
forwardedURI: "/proxy/node/node1:10250/redirect",
},
"redirect abs use reqHost no host no scheme": {
sourceURL: "http://mynode.com/redirect",
transport: emptyHostAndSchemeTransport,
redirect: "http://10.0.0.1:8001/redirected/target/",
redirectWant: "http://10.0.0.1:8001/proxy/node/node1:10250/redirected/target/",
forwardedURI: "/proxy/node/node1:10250/redirect",
reqHost: "10.0.0.1:8001",
},
"source contains the redirect already": {
input: `kubelet.loggoogle.log
`,
sourceURL: "http://foo.com/logs/log.log",
transport: testTransport,
output: `kubelet.loggoogle.log
`,
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"no host": {
input: "",
sourceURL: "http://mynode.com/logs/log.log",
transport: emptyHostTransport,
output: "",
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
"no scheme": {
input: "",
sourceURL: "http://mynode.com/logs/log.log",
transport: emptySchemeTransport,
output: "",
contentType: "text/html",
forwardedURI: "/proxy/node/node1:10250/logs/log.log",
},
}
testItem := func(name string, item *Item) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Check request headers.
if got, want := r.Header.Get("X-Forwarded-Uri"), item.forwardedURI; got != want {
t.Errorf("%v: X-Forwarded-Uri = %q, want %q", name, got, want)
}
if len(item.transport.Host) == 0 {
_, present := r.Header["X-Forwarded-Host"]
if present {
t.Errorf("%v: X-Forwarded-Host header should not be present", name)
}
} else {
if got, want := r.Header.Get("X-Forwarded-Host"), item.transport.Host; got != want {
t.Errorf("%v: X-Forwarded-Host = %q, want %q", name, got, want)
}
}
if len(item.transport.Scheme) == 0 {
_, present := r.Header["X-Forwarded-Proto"]
if present {
t.Errorf("%v: X-Forwarded-Proto header should not be present", name)
}
} else {
if got, want := r.Header.Get("X-Forwarded-Proto"), item.transport.Scheme; got != want {
t.Errorf("%v: X-Forwarded-Proto = %q, want %q", name, got, want)
}
}
// Send response.
if item.redirect != "" {
http.Redirect(w, r, item.redirect, http.StatusMovedPermanently)
return
}
w.Header().Set("Content-Type", item.contentType)
fmt.Fprint(w, item.input)
}))
defer server.Close()
// Replace source URL with our test server address.
sourceURL := parseURLOrDie(item.sourceURL)
serverURL := parseURLOrDie(server.URL)
item.input = strings.Replace(item.input, sourceURL.Host, serverURL.Host, -1)
item.redirect = strings.Replace(item.redirect, sourceURL.Host, serverURL.Host, -1)
sourceURL.Host = serverURL.Host
req, err := http.NewRequest("GET", sourceURL.String(), nil)
if err != nil {
t.Errorf("%v: Unexpected error: %v", name, err)
return
}
if item.reqHost != "" {
req.Host = item.reqHost
}
resp, err := item.transport.RoundTrip(req)
if err != nil {
t.Errorf("%v: Unexpected error: %v", name, err)
return
}
if item.redirect != "" {
// Check that redirect URLs get rewritten properly.
if got, want := resp.Header.Get("Location"), item.redirectWant; got != want {
t.Errorf("%v: Location header = %q, want %q", name, got, want)
}
return
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
t.Errorf("%v: Unexpected error: %v", name, err)
return
}
if e, a := item.output, string(body); e != a {
t.Errorf("%v: expected %v, but got %v", name, e, a)
}
}
for name, item := range table {
testItem(name, &item)
}
}
func TestRewriteResponse(t *testing.T) {
gzipbuf := bytes.NewBuffer(nil)
flatebuf := bytes.NewBuffer(nil)
testTransport := &Transport{
Scheme: "http",
Host: "foo.com",
PathPrepend: "/proxy/node/node1:10250",
}
expected := []string{
"short body test",
strings.Repeat("long body test", 4097),
}
test := []struct {
encodeType string
writer func(string) *http.Response
reader func(*http.Response) string
}{
{
encodeType: "gzip",
writer: func(ept string) *http.Response {
gzw := gzip.NewWriter(gzipbuf)
defer gzw.Close()
gzw.Write([]byte(ept))
gzw.Flush()
return &http.Response{
Body: ioutil.NopCloser(gzipbuf),
}
},
reader: func(rep *http.Response) string {
reader, _ := gzip.NewReader(rep.Body)
s, _ := ioutil.ReadAll(reader)
return string(s)
},
},
{
encodeType: "deflate",
writer: func(ept string) *http.Response {
flw, _ := flate.NewWriter(flatebuf, flate.BestCompression)
defer flw.Close()
flw.Write([]byte(ept))
flw.Flush()
return &http.Response{
Body: ioutil.NopCloser(flatebuf),
}
},
reader: func(rep *http.Response) string {
reader := flate.NewReader(rep.Body)
s, _ := ioutil.ReadAll(reader)
return string(s)
},
},
}
errFn := func(encode string, err error) {
t.Errorf("%s failed to read and write: %v", encode, err)
}
for _, v := range test {
request, _ := http.NewRequest("GET", "http://mynode.com/", nil)
request.Header.Set("Content-Encoding", v.encodeType)
request.Header.Add("Accept-Encoding", v.encodeType)
for _, exp := range expected {
resp := v.writer(exp)
gotResponse, err := testTransport.rewriteResponse(request, resp)
if err != nil {
errFn(v.encodeType, err)
}
result := v.reader(gotResponse)
if result != exp {
errFn(v.encodeType, fmt.Errorf("expected %s, get %s", exp, result))
}
}
}
}