22c9f45598
This changeset defines the application structure to be used for the http side of the new registry. The main components are the App and Context structs. The App context is instance global and manages global configuration and resources. Context contains request-specific resources that may be created as a by-product of an in-flight request. To latently construct per-request handlers and leverage gorilla/mux, a dispatch structure has been propped up next to the main handler flow. Without this, a router and all handlers need to be constructed on every request. By constructing handlers on each request, we ensure thread isolation and can carefully control the security context of in-flight requests. There are unit tests covering this functionality.
127 lines
2.9 KiB
Go
127 lines
2.9 KiB
Go
package registry
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import (
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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"github.com/docker/docker-registry/configuration"
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)
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// TestAppDispatcher builds an application with a test dispatcher and ensures
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// that requests are properly dispatched and the handlers are constructed.
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// This only tests the dispatch mechanism. The underlying dispatchers must be
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// tested individually.
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func TestAppDispatcher(t *testing.T) {
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app := &App{
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Config: configuration.Configuration{},
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router: v2APIRouter(),
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}
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server := httptest.NewServer(app)
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router := v2APIRouter()
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serverURL, err := url.Parse(server.URL)
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if err != nil {
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t.Fatalf("error parsing server url: %v", err)
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}
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varCheckingDispatcher := func(expectedVars map[string]string) dispatchFunc {
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return func(ctx *Context, r *http.Request) http.Handler {
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// Always checks the same name context
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if ctx.Name != ctx.vars["name"] {
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t.Fatalf("unexpected name: %q != %q", ctx.Name, "foo/bar")
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}
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// Check that we have all that is expected
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for expectedK, expectedV := range expectedVars {
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if ctx.vars[expectedK] != expectedV {
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t.Fatalf("unexpected %s in context vars: %q != %q", expectedK, ctx.vars[expectedK], expectedV)
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}
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}
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// Check that we only have variables that are expected
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for k, v := range ctx.vars {
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_, ok := expectedVars[k]
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if !ok { // name is checked on context
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// We have an unexpected key, fail
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t.Fatalf("unexpected key %q in vars with value %q", k, v)
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}
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}
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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})
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}
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}
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// unflatten a list of variables, suitable for gorilla/mux, to a map[string]string
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unflatten := func(vars []string) map[string]string {
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m := make(map[string]string)
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for i := 0; i < len(vars)-1; i = i + 2 {
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m[vars[i]] = vars[i+1]
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}
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return m
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}
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for _, testcase := range []struct {
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endpoint string
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vars []string
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}{
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{
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endpoint: routeNameImageManifest,
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vars: []string{
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"name", "foo/bar",
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"tag", "sometag",
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},
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},
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{
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endpoint: routeNameTags,
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vars: []string{
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"name", "foo/bar",
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},
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},
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{
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endpoint: routeNameLayer,
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vars: []string{
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"name", "foo/bar",
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"tarsum", "thetarsum",
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},
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},
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{
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endpoint: routeNameLayerUpload,
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vars: []string{
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"name", "foo/bar",
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"tarsum", "thetarsum",
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},
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},
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{
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endpoint: routeNameLayerUploadResume,
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vars: []string{
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"name", "foo/bar",
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"tarsum", "thetarsum",
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"uuid", "theuuid",
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},
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},
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} {
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app.register(testcase.endpoint, varCheckingDispatcher(unflatten(testcase.vars)))
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route := router.GetRoute(testcase.endpoint).Host(serverURL.Host)
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u, err := route.URL(testcase.vars...)
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if err != nil {
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t.Fatal(err)
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}
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resp, err := http.Get(u.String())
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if err != nil {
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t.Fatal(err)
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}
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if resp.StatusCode != http.StatusOK {
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t.Fatalf("unexpected status code: %v != %v", resp.StatusCode, http.StatusOK)
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}
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}
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}
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