if err != nil {
			t.Fatal(err)
		}
		if res.StatusCode != tt.want {
			t.Errorf("POST %s: status code = %d; want %d", tt.suffix, res.StatusCode, tt.want)
		}
	}
	log.Lock()
	got := log.String()
	log.Unlock()

	got = strings.TrimSpace(got)
	want = strings.TrimSpace(want)

	if got != want {
		got, want, lines := removeCommonLines(got, want)

				return oi, InvalidPart{
					PartNumber: part.PartNumber,
				}
			}
			wantCS := map[string]string{
				hash.ChecksumCRC32.String():  part.ChecksumCRC32,
				hash.ChecksumCRC32C.String(): part.ChecksumCRC32C,
				hash.ChecksumSHA1.String():   part.ChecksumSHA1,
				hash.ChecksumSHA256.String(): part.ChecksumSHA256,
			}
			if wantCS[checksumType.String()] != crc {
				return oi, InvalidPart{

	return true
}

// checkID - check if the disk-id in the request corresponds to the underlying disk.
func (s *storageRESTServer) checkID(wantID string) bool {
	if s.getStorage() == nil {
		return false
	}
	if wantID == "" {
		// Request sent empty disk-id, we allow the request
		// as the peer might be coming up and trying to read format.json
		// or create format.json
		return true
	}

func expectRunningOrFail(t *testing.T, ctrl *Controller, want bool) {
	// running gets flipped in a goroutine, retry to avoid race
	retry.UntilSuccessOrFail(t, func() error {
		for _, registry := range ctrl.registries {
			if running := registry.Instance.(*RunnableRegistry).running.Load(); running != want {
				return fmt.Errorf("%s running is %v but wanted %v", registry.Cluster(), running, want)
			}
		}
		return nil

This decoupling of parts, and being a "microframework" that could be extended to cover exactly what is needed was a key feature that I wanted to keep.

Given the simplicity of Flask, it seemed like a good match for building APIs. The next thing to find was a "Django REST Framework" for Flask.

!!! check "Inspired **FastAPI** to"

		}

		// Copy out the string.
		n, err := io.CopyN(&sb, r, int64(len))
		if n != int64(len) {
			return fmt.Errorf("failed to read full string: read %d but wanted %d", n, len)
		}
		if err != nil {
			return fmt.Errorf("copying string data: %w", err)
		}

		// Add the string to the map.
		s := sb.String()
		sb.Reset()

You can check it at <a href="http://127.0.0.1:9999/api/v1/docs" class="external-link" target="_blank">http://127.0.0.1:9999/api/v1/docs</a>:

<img src="/img/tutorial/behind-a-proxy/image02.png">

Right as we wanted it. ✔️

This is because FastAPI uses this `root_path` to create the default `server` in OpenAPI with the URL provided by `root_path`.

## Additional servers

!!! warning

		t.Fatalf("failed to access .%s: %v", strings.Join(pth, "."), err)
	} else if !found {
		t.Fatalf("failed to find .%s", strings.Join(pth, "."))
	} else if v != value {
		t.Fatalf("wanted %d at .%s, got %d", value, strings.Join(pth, "."), v)
	}
}
func expectString(t *testing.T, obj map[string]interface{}, value string, pth ...string) {

	defer i.mu.Unlock()

	var oldEntry *entry[K, V]
	if n != nil {
		oldEntry = n.entry()
		if v, ok := oldEntry.lookup(key, ht.keyEqual); ok {
			// Easy case: by loading again, it turns out exactly what we wanted is here!
			return v, true
		}
	}
	newEntry := newEntryNode(key, value)
	if oldEntry == nil {
		// Easy case: create a new entry and store it.
		slot.Store(&newEntry.node)
	} else {

			}
			if !reflect.DeepEqual(result.Header, tt.wantHeaders) {
				t.Fatal(cmp.Diff(tt.wantHeaders, result.Header))
			}
			body, _ := ioutil.ReadAll(result.Body)
			if !bytes.Equal(tt.wantBody, body) {
				t.Fatalf("wanted:\n%s\ngot:\n%s", hex.Dump(tt.wantBody), hex.Dump(body))
			}
		})
	}
}

func randTime(t *time.Time, r *rand.Rand) {
	*t = time.Unix(r.Int63n(1000*365*24*60*60), r.Int63())
}