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url_prefixer_test.go
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package server_test
import (
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
"github.com/influxdata/chronograf/mocks"
"github.com/influxdata/chronograf/server"
)
var prefixerTests = []struct {
name string
subject string
expected string
shouldErr bool
attrs [][]byte
}{
{
`One script tag`,
`<script type="text/javascript" src="/loljavascript.min.js">`,
`<script type="text/javascript" src="/arbitraryprefix/loljavascript.min.js">`,
false,
[][]byte{
[]byte(`src="`),
},
},
{
`Two script tags`,
`<script type="text/javascript" src="/loljavascript.min.js"><script type="text/javascript" src="/anotherscript.min.js">`,
`<script type="text/javascript" src="/arbitraryprefix/loljavascript.min.js"><script type="text/javascript" src="/arbitraryprefix/anotherscript.min.js">`,
false,
[][]byte{
[]byte(`src="`),
},
},
{
`Link href`,
`<link rel="shortcut icon" href="/favicon.ico">`,
`<link rel="shortcut icon" href="/arbitraryprefix/favicon.ico">`,
false,
[][]byte{
[]byte(`src="`),
[]byte(`href="`),
},
},
{
`Trailing HTML`,
`<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8"/>
<title>Chronograf</title>
<link rel="shortcut icon" href="/favicon.ico"><link href="/chronograf.css" rel="stylesheet"></head>
<body>
<div id='react-root'></div>
<script type="text/javascript" src="/manifest.7489452b099f9581ca1b.dev.js"></script><script type="text/javascript" src="/vendor.568c0101d870a13ecff9.dev.js"></script><script type="text/javascript" src="/app.13d0ce0b33609be3802b.dev.js"></script></body>
</html>`,
`<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8"/>
<title>Chronograf</title>
<link rel="shortcut icon" href="/arbitraryprefix/favicon.ico"><link href="/arbitraryprefix/chronograf.css" rel="stylesheet"></head>
<body>
<div id='react-root'></div>
<script type="text/javascript" src="/arbitraryprefix/manifest.7489452b099f9581ca1b.dev.js"></script><script type="text/javascript" src="/arbitraryprefix/vendor.568c0101d870a13ecff9.dev.js"></script><script type="text/javascript" src="/arbitraryprefix/app.13d0ce0b33609be3802b.dev.js"></script></body>
</html>`,
false,
[][]byte{
[]byte(`src="`),
[]byte(`href="`),
},
},
}
func Test_Server_Prefixer_RewritesURLs(t *testing.T) {
t.Parallel()
for _, test := range prefixerTests {
subject := test.subject
expected := test.expected
backend := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, subject)
})
pfx := &server.URLPrefixer{Prefix: "/arbitraryprefix", Next: backend, Attrs: test.attrs}
ts := httptest.NewServer(pfx)
defer ts.Close()
res, err := http.Get(ts.URL)
if err != nil {
t.Error("Unexpected error fetching from prefixer: err:", err)
}
actual, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Error("Unable to read prefixed body: err:", err)
}
if string(actual) != expected+"\n" {
t.Error(test.name, ":\n Unsuccessful prefixing.\n\tWant:", fmt.Sprintf("%+q", expected), "\n\tGot: ", fmt.Sprintf("%+q", string(actual)))
}
}
}
// clogger is an http.ResponseWriter that is not an http.Flusher. It is used
// for testing the behavior of handlers that may rely on specific behavior of
// http.Flusher
type clogger struct {
next http.ResponseWriter
}
func (c *clogger) Header() http.Header {
return c.next.Header()
}
func (c *clogger) Write(bytes []byte) (int, error) {
return c.next.Write(bytes)
}
func (c *clogger) WriteHeader(code int) {
c.next.WriteHeader(code)
}
func Test_Server_Prefixer_NoPrefixingWithoutFlusther(t *testing.T) {
backend := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
fmt.Fprintf(rw, "<a href=\"/valley\">Hill Valley Preservation Society</a>")
})
wrapFunc := func(next http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
clog := &clogger{rw}
next.ServeHTTP(clog, r)
})
}
tl := &mocks.TestLogger{}
pfx := &server.URLPrefixer{
Prefix: "/hill",
Next: backend,
Logger: tl,
Attrs: [][]byte{
[]byte("href=\""),
},
}
ts := httptest.NewServer(wrapFunc(pfx))
defer ts.Close()
res, err := http.Get(ts.URL)
if err != nil {
t.Fatal("Unexpected error fetching from prefixer: err:", err)
}
actual, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Fatal("Unable to read prefixed body: err:", err)
}
unexpected := "<a href=\"/hill/valley\">Hill Valley Preservation Society</a>"
expected := "<a href=\"/valley\">Hill Valley Preservation Society</a>"
if string(actual) == unexpected {
t.Error("No Flusher", ":\n Prefixing occurred without an http.Flusher")
}
if string(actual) != expected {
t.Error("No Flusher", ":\n\tPrefixing failed to output without an http.Flusher\n\t\tWant:\n", expected, "\n\t\tGot:\n", string(actual))
}
if !tl.HasMessage("info", server.ErrNotFlusher) {
t.Error("No Flusher", ":\n Expected Error Message: \"", server.ErrNotFlusher, "\" but saw none. Msgs:", tl.Messages)
}
}
func Test_Server_Prefixer_IgnoreJsAndSvg(t *testing.T) {
expected := "Keep it the same please"
backend := http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
fmt.Fprintf(rw, expected)
})
tl := &mocks.TestLogger{}
pfx := &server.URLPrefixer{
Prefix: " error",
Next: backend,
Logger: tl,
Attrs: [][]byte{
[]byte("same"),
},
}
ts := httptest.NewServer(pfx)
defer ts.Close()
for _, fileName := range []string{"/test.js", "/test.svg"} {
res, err := http.Get(ts.URL + fileName)
if err != nil {
t.Fatal("Unexpected error fetching from prefixer: err:", err)
}
actual, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Fatal("Unable to read prefixed body: err:", err)
}
if string(actual) != expected {
t.Error("Prefixing changed content of ", fileName, ":\n\t\tWant:\n", expected, "\n\t\tGot:\n", string(actual))
}
}
}