Simone Basso 2e0118d1a6
refactor(netxlite): hide details without breaking the rest of the tree (#454)
## Description

This PR continues the refactoring of `netx` under the following principles:

1. do not break the rest of the tree and do not engage in extensive tree-wide refactoring yet
2. move under `netxlite` clearly related subpackages (e.g., `iox`, `netxmocks`)
3. move into `internal/netxlite/internal` stuff that is clearly private of `netxlite`
4. hide implementation details in `netxlite` pending new factories
5. refactor `tls` code in `netxlite` to clearly separate `crypto/tls` code from `utls` code

After each commit, I run `go test -short -race ./...` locally. Each individual commit explains what it does. I will squash, but this operation will preserve the original commit titles, so this will give further insight on each step.

## Commits

* refactor: rename netxmocks -> netxlite/mocks

Part of https://github.com/ooni/probe/issues/1591

* refactor: rename quicx -> netxlite/quicx

See https://github.com/ooni/probe/issues/1591

* refactor: rename iox -> netxlite/iox

Regenerate sources and make sure the tests pass.

See https://github.com/ooni/probe/issues/1591.

* refactor(iox): move MockableReader to netxlite/mocks

See https://github.com/ooni/probe/issues/1591

* refactor(netxlite): generator is an implementation detail

See https://github.com/ooni/probe/issues/1591

* refactor(netxlite): separate tls and utls code

See https://github.com/ooni/probe/issues/1591

* refactor(netxlite): hide most types but keep old names as legacy

With this change we avoid breaking the rest of the tree, but we start
hiding some implementation details a bit. Factories will follow.

See https://github.com/ooni/probe/issues/1591
2021-09-05 14:49:38 +02:00

103 lines
2.0 KiB
Go

package internal
import (
"context"
"io"
"net"
"net/http"
"time"
"github.com/ooni/probe-cli/v3/internal/atomicx"
"github.com/ooni/probe-cli/v3/internal/engine/netx"
"github.com/ooni/probe-cli/v3/internal/netxlite/iox"
)
type FakeResolver struct {
NumFailures *atomicx.Int64
Err error
Result []string
}
func NewFakeResolverThatFails() FakeResolver {
return FakeResolver{NumFailures: &atomicx.Int64{}, Err: ErrNotFound}
}
func NewFakeResolverWithResult(r []string) FakeResolver {
return FakeResolver{NumFailures: &atomicx.Int64{}, Result: r}
}
var ErrNotFound = &net.DNSError{
Err: "no such host",
}
func (c FakeResolver) LookupHost(ctx context.Context, hostname string) ([]string, error) {
time.Sleep(10 * time.Microsecond)
if c.Err != nil {
if c.NumFailures != nil {
c.NumFailures.Add(1)
}
return nil, c.Err
}
return c.Result, nil
}
func (c FakeResolver) Network() string {
return "fake"
}
func (c FakeResolver) Address() string {
return ""
}
var _ netx.Resolver = FakeResolver{}
type FakeTransport struct {
Err error
Func func(*http.Request) (*http.Response, error)
Resp *http.Response
}
func (txp FakeTransport) RoundTrip(req *http.Request) (*http.Response, error) {
time.Sleep(10 * time.Microsecond)
if txp.Func != nil {
return txp.Func(req)
}
if req.Body != nil {
iox.ReadAllContext(req.Context(), req.Body)
req.Body.Close()
}
if txp.Err != nil {
return nil, txp.Err
}
txp.Resp.Request = req // non thread safe but it doesn't matter
return txp.Resp, nil
}
func (txp FakeTransport) CloseIdleConnections() {}
var _ netx.HTTPRoundTripper = FakeTransport{}
type FakeBody struct {
Data []byte
Err error
}
func (fb *FakeBody) Read(p []byte) (int, error) {
time.Sleep(10 * time.Microsecond)
if fb.Err != nil {
return 0, fb.Err
}
if len(fb.Data) <= 0 {
return 0, io.EOF
}
n := copy(p, fb.Data)
fb.Data = fb.Data[n:]
return n, nil
}
func (fb *FakeBody) Close() error {
return nil
}
var _ io.ReadCloser = &FakeBody{}