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http_test.go
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package notifications
import (
"crypto/tls"
"encoding/json"
"fmt"
"mime"
"net"
"net/http"
"net/http/httptest"
"reflect"
"strconv"
"strings"
"testing"
"github.com/distribution/distribution/v3/manifest/schema1"
events "github.com/docker/go-events"
)
// TestHTTPSink mocks out an http endpoint and notifies it under a couple of
// conditions, ensuring correct behavior.
func TestHTTPSink(t *testing.T) {
serverHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer r.Body.Close()
if r.Method != "POST" {
w.WriteHeader(http.StatusMethodNotAllowed)
t.Fatalf("unexpected request method: %v", r.Method)
return
}
// Extract the content type and make sure it matches
contentType := r.Header.Get("Content-Type")
mediaType, _, err := mime.ParseMediaType(contentType)
if err != nil {
w.WriteHeader(http.StatusBadRequest)
t.Fatalf("error parsing media type: %v, contenttype=%q", err, contentType)
return
}
if mediaType != EventsMediaType {
w.WriteHeader(http.StatusUnsupportedMediaType)
t.Fatalf("incorrect media type: %q != %q", mediaType, EventsMediaType)
return
}
var envelope Envelope
dec := json.NewDecoder(r.Body)
if err := dec.Decode(&envelope); err != nil {
w.WriteHeader(http.StatusBadRequest)
t.Fatalf("error decoding request body: %v", err)
return
}
// Let caller choose the status
status, err := strconv.Atoi(r.FormValue("status"))
if err != nil {
t.Logf("error parsing status: %v", err)
// May just be empty, set status to 200
status = http.StatusOK
}
w.WriteHeader(status)
})
server := httptest.NewTLSServer(serverHandler)
metrics := newSafeMetrics("")
sink := newHTTPSink(server.URL, 0, nil, nil,
&endpointMetricsHTTPStatusListener{safeMetrics: metrics})
// first make sure that the default transport gives x509 untrusted cert error
event := Event{}
err := sink.Write(event)
if !strings.Contains(err.Error(), "x509") && !strings.Contains(err.Error(), "unknown ca") {
t.Fatal("TLS server with default transport should give unknown CA error")
}
if err := sink.Close(); err != nil {
t.Fatalf("unexpected error closing http sink: %v", err)
}
// make sure that passing in the transport no longer gives this error
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
sink = newHTTPSink(server.URL, 0, nil, tr,
&endpointMetricsHTTPStatusListener{safeMetrics: metrics})
err = sink.Write(event)
if err != nil {
t.Fatalf("unexpected error writing event: %v", err)
}
// reset server to standard http server and sink to a basic sink
metrics = newSafeMetrics("")
server = httptest.NewServer(serverHandler)
sink = newHTTPSink(server.URL, 0, nil, nil,
&endpointMetricsHTTPStatusListener{safeMetrics: metrics})
var expectedMetrics EndpointMetrics
expectedMetrics.Statuses = make(map[string]int)
closeL, err := net.Listen("tcp", "localhost:0")
if err != nil {
t.Fatalf("unexpected error creating listener: %v", err)
}
defer closeL.Close()
go func() {
for {
c, err := closeL.Accept()
if err != nil {
return
}
c.Close()
}
}()
for _, tc := range []struct {
event events.Event // events to send
url string
isFailure bool // true if there should be a failure.
isError bool // true if the request returns an error
statusCode int // if not set, no status code should be incremented.
}{
{
statusCode: http.StatusOK,
event: createTestEvent("push", "library/test", schema1.MediaTypeSignedManifest),
},
{
statusCode: http.StatusOK,
event: createTestEvent("push", "library/test", schema1.MediaTypeSignedManifest),
},
{
statusCode: http.StatusOK,
event: createTestEvent("push", "library/test", layerMediaType),
},
{
statusCode: http.StatusOK,
event: createTestEvent("push", "library/test", layerMediaType),
},
{
statusCode: http.StatusTemporaryRedirect,
},
{
statusCode: http.StatusBadRequest,
isFailure: true,
},
{
// Case where connection is immediately closed
url: "http://" + closeL.Addr().String(),
isError: true,
},
} {
if tc.isFailure {
expectedMetrics.Failures++
} else if tc.isError {
expectedMetrics.Errors++
} else {
expectedMetrics.Successes++
}
if tc.statusCode > 0 {
expectedMetrics.Statuses[fmt.Sprintf("%d %s", tc.statusCode, http.StatusText(tc.statusCode))]++
}
url := tc.url
if url == "" {
url = server.URL + "/"
}
// setup endpoint to respond with expected status code.
url += fmt.Sprintf("?status=%v", tc.statusCode)
sink.url = url
t.Logf("testcase: %v, fail=%v, error=%v", url, tc.isFailure, tc.isError)
// Try a simple event emission.
err := sink.Write(tc.event)
if !tc.isFailure && !tc.isError {
if err != nil {
t.Fatalf("unexpected error send event: %v", err)
}
} else {
if err == nil {
t.Fatalf("the endpoint should have rejected the request")
}
t.Logf("write error: %v", err)
}
if !reflect.DeepEqual(metrics.EndpointMetrics, expectedMetrics) {
t.Fatalf("metrics not as expected: %#v != %#v", metrics.EndpointMetrics, expectedMetrics)
}
}
if err := sink.Close(); err != nil {
t.Fatalf("unexpected error closing http sink: %v", err)
}
// double close returns error
if err := sink.Close(); err == nil {
t.Fatalf("second close should have returned error: %v", err)
}
}
func createTestEvent(action, repo, typ string) Event {
event := createEvent(action)
event.Target.MediaType = typ
event.Target.Repository = repo
return *event
}