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hijack_test.go
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package rod_test
import (
"errors"
"io/ioutil"
"mime"
"net/http"
"sync"
"github.com/go-rod/rod"
"github.com/go-rod/rod/lib/proto"
"github.com/go-rod/rod/lib/utils"
"github.com/ysmood/gson"
)
func (t T) Hijack() {
s := t.Serve()
// to simulate a backend server
s.Route("/", slash("fixtures/fetch.html"))
s.Mux.HandleFunc("/a", func(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
panic("wrong http method")
}
t.Eq("header", r.Header.Get("Test"))
b, err := ioutil.ReadAll(r.Body)
t.E(err)
t.Eq("a", string(b))
t.HandleHTTP(".html", "test")(w, r)
})
s.Route("/b", "", "b")
router := t.page.HijackRequests()
defer router.MustStop()
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) {
r := ctx.Request.SetContext(t.Context())
r.Req().Header.Set("Test", "header") // override request header
r.SetBody([]byte("test")) // override request body
r.SetBody(123) // override request body
r.SetBody(r.Body()) // override request body
type MyState struct {
Val int
}
ctx.CustomState = &MyState{10}
t.Eq(http.MethodPost, r.Method())
t.Eq(s.URL("/a"), r.URL().String())
t.Eq(proto.NetworkResourceTypeXHR, ctx.Request.Type())
t.Is(ctx.Request.IsNavigation(), false)
t.Has(ctx.Request.Header("Origin"), s.URL())
t.Len(ctx.Request.Headers(), 6)
t.True(ctx.Request.JSONBody().Nil())
// send request load response from real destination as the default value to hijack
ctx.MustLoadResponse()
t.Eq(200, ctx.Response.Payload().ResponseCode)
// override status code
ctx.Response.Payload().ResponseCode = http.StatusCreated
t.Eq("4", ctx.Response.Headers().Get("Content-Length"))
t.Has(ctx.Response.Headers().Get("Content-Type"), "text/html; charset=utf-8")
// override response header
ctx.Response.SetHeader("Set-Cookie", "key=val")
// override response body
ctx.Response.SetBody([]byte("test"))
ctx.Response.SetBody("test")
ctx.Response.SetBody(map[string]string{
"text": "test",
})
t.Eq("{\"text\":\"test\"}", ctx.Response.Body())
})
router.MustAdd(s.URL("/b"), func(ctx *rod.Hijack) {
panic("should not come to here")
})
router.MustRemove(s.URL("/b"))
router.MustAdd(s.URL("/b"), func(ctx *rod.Hijack) {
// transparent proxy
ctx.MustLoadResponse()
})
go router.Run()
t.page.MustNavigate(s.URL())
t.Eq("201 test key=val", t.page.MustElement("#a").MustText())
t.Eq("b", t.page.MustElement("#b").MustText())
}
func (t T) HijackContinue() {
s := t.Serve().Route("/", ".html", `<body>ok</body>`)
router := t.page.HijackRequests()
defer router.MustStop()
wg := &sync.WaitGroup{}
wg.Add(1)
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) {
ctx.ContinueRequest(&proto.FetchContinueRequest{})
wg.Done()
})
go router.Run()
t.page.MustNavigate(s.URL("/a"))
t.Eq("ok", t.page.MustElement("body").MustText())
wg.Wait()
}
func (t T) HijackMockWholeResponse() {
router := t.page.HijackRequests()
defer router.MustStop()
router.MustAdd("*", func(ctx *rod.Hijack) {
ctx.Response.SetHeader("Content-Type", mime.TypeByExtension(".html"))
ctx.Response.SetBody("<body>ok</body>")
})
go router.Run()
t.page.MustNavigate("http://test.com")
t.Eq("ok", t.page.MustElement("body").MustText())
}
func (t T) HijackSkip() {
s := t.Serve()
router := t.page.HijackRequests()
defer router.MustStop()
wg := &sync.WaitGroup{}
wg.Add(2)
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) {
ctx.Skip = true
wg.Done()
})
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) {
ctx.ContinueRequest(&proto.FetchContinueRequest{})
wg.Done()
})
go router.Run()
t.page.MustNavigate(s.URL("/a"))
wg.Wait()
}
func (t T) HijackOnErrorLog() {
s := t.Serve().Route("/", ".html", `<body>ok</body>`)
router := t.page.HijackRequests()
defer router.MustStop()
wg := &sync.WaitGroup{}
wg.Add(1)
var err error
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) {
ctx.OnError = func(e error) {
err = e
wg.Done()
}
ctx.ContinueRequest(&proto.FetchContinueRequest{})
})
go router.Run()
t.mc.stub(1, proto.FetchContinueRequest{}, func(send StubSend) (gson.JSON, error) {
return gson.New(nil), errors.New("err")
})
go func() {
_ = t.page.Context(t.Context()).Navigate(s.URL("/a"))
}()
wg.Wait()
t.Eq(err.Error(), "err")
}
func (t T) HijackFailRequest() {
s := t.Serve().Route("/page", ".html", `<html>
<body></body>
<script>
fetch('/a').catch(async (err) => {
document.title = err.message
})
</script></html>`)
router := t.browser.HijackRequests()
defer router.MustStop()
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) {
ctx.Response.Fail(proto.NetworkErrorReasonAborted)
})
go router.Run()
t.page.MustNavigate(s.URL("/page")).MustWaitLoad()
t.page.MustWait(`document.title === 'Failed to fetch'`)
{ // test error log
t.mc.stub(1, proto.FetchFailRequest{}, func(send StubSend) (gson.JSON, error) {
_, _ = send()
return gson.JSON{}, errors.New("err")
})
_ = t.page.Navigate(s.URL("/a"))
}
}
func (t T) HijackLoadResponseErr() {
p := t.newPage().Context(t.Context())
router := p.HijackRequests()
defer router.MustStop()
wg := &sync.WaitGroup{}
wg.Add(1)
router.MustAdd("http://test.com/a", func(ctx *rod.Hijack) {
t.Err(ctx.LoadResponse(&http.Client{
Transport: &MockRoundTripper{err: errors.New("err")},
}, true))
t.Err(ctx.LoadResponse(&http.Client{
Transport: &MockRoundTripper{res: &http.Response{
StatusCode: 200,
Body: ioutil.NopCloser(&MockReader{err: errors.New("err")}),
}},
}, true))
wg.Done()
ctx.Response.Fail(proto.NetworkErrorReasonAborted)
})
go router.Run()
_ = p.Navigate("http://test.com/a")
wg.Wait()
}
func (t T) HijackResponseErr() {
s := t.Serve().Route("/", ".html", `ok`)
p := t.newPage().Context(t.Context())
router := p.HijackRequests()
defer router.MustStop()
wg := &sync.WaitGroup{}
wg.Add(1)
router.MustAdd(s.URL("/a"), func(ctx *rod.Hijack) { // to ignore favicon
ctx.OnError = func(err error) {
t.Err(err)
wg.Done()
}
ctx.MustLoadResponse()
t.mc.stub(1, proto.FetchFulfillRequest{}, func(send StubSend) (gson.JSON, error) {
res, _ := send()
return res, errors.New("err")
})
})
go router.Run()
p.MustNavigate(s.URL("/a"))
wg.Wait()
}
func (t T) HandleAuth() {
s := t.Serve()
// mock the server
s.Mux.HandleFunc("/a", func(w http.ResponseWriter, r *http.Request) {
u, p, ok := r.BasicAuth()
if !ok {
w.Header().Add("WWW-Authenticate", `Basic realm="web"`)
w.WriteHeader(401)
return
}
t.Eq("a", u)
t.Eq("b", p)
t.HandleHTTP(".html", `<p>ok</p>`)(w, r)
})
s.Route("/err", ".html", "err page")
go t.browser.MustHandleAuth("a", "b")()
page := t.newPage(s.URL("/a"))
page.MustElementR("p", "ok")
wait := t.browser.HandleAuth("a", "b")
var page2 *rod.Page
wait2 := utils.All(func() {
page2, _ = t.browser.Page(proto.TargetCreateTarget{URL: s.URL("/err")})
})
t.mc.stubErr(1, proto.FetchContinueRequest{})
t.Err(wait())
wait2()
page2.MustClose()
}