8000 Preserve default transport settings for non-validating clients by xtrusia · Pull Request #108 · go-goose/goose · GitHub
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30 changes: 21 additions & 9 deletions client/client.go
Original file line number Diff line number Diff line change
Expand Up @@ -130,17 +130,29 @@ func WithInsecureHTTPClient(client *http.Client) Option {
}
}

func newHTTPClient(skipVerify bool) *http.Client {
transport, ok := http.DefaultTransport.(*http.Transport)
if ok {
transport = transport.Clone()
} else if skipVerify {
transport = &http.Transport{}
} else {
return &http.Client{Transport: http.DefaultTransport}
}
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if skipVerify {
if transport.TLSClientConfig == nil {
transport.TLSClientConfig = &tls.Config{}
}
transport.TLSClientConfig.InsecureSkipVerify = true
}
return &http.Client{Transport: transport}
}

func newOptions() *options {
return &options{
httpHeadersFunc: goosehttp.DefaultHeaders,
httpClient: &http.Client{},
insecureHTTPClient: &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
},
},
httpHeadersFunc: goosehttp.DefaultHeaders,
httpClient: newHTTPClient(false),
insecureHTTPClient: newHTTPClient(true),
}
}

Expand Down
88 changes: 88 additions & 0 deletions client/options_test.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,88 @@
package client

import (
"crypto/tls"
"net/http"
"net/url"
"testing"
)

type fakeRoundTripper struct {
http.RoundTripper
}

func TestCustomDefaultTransport(t *testing.T) {
original := http.DefaultTransport
t.Cleanup(func() { http.DefaultTransport = original })
defaultTransport := &fakeRoundTripper{}
http.DefaultTransport = defaultTransport

options := newOptions()
if options.httpClient.Transport != defaultTransport {
t.Fatal("custom default transport was not preserved")
}
insecureTransport, ok := options.insecureHTTPClient.Transport.(*http.Transport)
if !ok || insecureTransport.TLSClientConfig == nil || !insecureTransport.TLSClientConfig.InsecureSkipVerify {
t.Fatalf("unexpected insecure transport: %#v", options.insecureHTTPClient.Transport)
}

NewPublicClient("https://example.invalid", nil)
NewNonValidatingPublicClient("https://example.invalid", nil)
NewNonValidatingPublicClient("https://example.invalid", nil, WithInsecureHTTPClient(&http.Client{}))
}

func TestNewHTTPClientsPreserveDefaultTransport(t *testing.T) {
original := http.DefaultTransport
t.Cleanup(func() { http.DefaultTransport = original })

proxyURL, err := url.Parse("http://proxy.example")
if err != nil {
t.Fatal(err)
}
defaultTransport := &http.Transport{
Proxy: http.ProxyURL(proxyURL),
MaxIdleConns: 42,
TLSClientConfig: &tls.Config{MinVersion: tls.VersionTLS12},
}
http.DefaultTransport = defaultTransport

request, err := http.NewRequest(http.MethodGet, "https://example.invalid", nil)
if err != nil {
t.Fatal(err)
}
options := newOptions()
for _, test := range []struct {
name string
client *http.Client
skipVerify bool
}{
{name: "validating", client: options.httpClient},
{name: "non-validating", client: options.insecureHTTPClient, skipVerify: true},
} {
t.Run(test.name, func(t *testing.T) {
transport, ok := test.client.Transport.(*http.Transport)
if !ok {
t.Fatalf("unexpected transport: %#v", test.client.Transport)
}
if transport == defaultTransport {
t.Fatal("default transport was not cloned")
}
if transport.Proxy == nil {
t.Fatal("default proxy setting was not preserved")
}
gotProxyURL, err := transport.Proxy(request)
if err != nil {
t.Fatal(err)
}
if gotProxyURL.String() != proxyURL.String() || transport.MaxIdleConns != 42 {
t.Fatalf("default transport settings were not preserved: %#v", transport)
}
if transport.TLSClientConfig.InsecureSkipVerify != test.skipVerify || transport.TLSClientConfig.MinVersion != tls.VersionTLS12 {
t.Fatalf("unexpected TLS configuration: %#v", transport.TLSClientConfig)
}
})
}
if defaultTransport.TLSClientConfig.InsecureSkipVerify {
t.Fatal("default transport was modified")
}
}
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