### Tài liệu API thay thế

Và bây giờ, hãy truy cập tới <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>.

Bạn sẽ thấy tài liệu được thay thế (cung cấp bởi <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a>):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Nâng cấp ví dụ

	var cap0 int
	for i := 0; i < 5<<10; i++ {
		b.Write(buf)
		b.Read(buf)
		if i == 0 {
			cap0 = b.Cap()
		}
	}
	cap1 := b.Cap()
	// (*Buffer).grow allows for 2x capacity slop before sliding,
	// so set our error threshold at 3x.
	if cap1 > cap0*3 {
		t.Errorf("buffer cap = %d; too big (grew from %d)", cap1, cap0)
	}
}

func BenchmarkWriteByte(b *testing.B) {
	const n = 4 << 10

{"message": "Hello World"}
```

### Tài liệu tương tác API

Bây giờ tới <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

Bạn sẽ thấy một tài liệu tương tác API (cung cấp bởi <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

				return
			}
		case "Rules":
			var zb0002 uint32
			zb0002, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "Rules")
				return
			}
			if cap(z.Rules) >= int(zb0002) {
				z.Rules = (z.Rules)[:zb0002]
			} else {
				z.Rules = make([]BatchJobExpireFilter, zb0002)
			}
			for za0001 := range z.Rules {
				err = z.Rules[za0001].DecodeMsg(dc)
				if err != nil {

func (b *Buffer) Len() int { return len(b.buf) - b.off }

// Cap returns the capacity of the buffer's underlying byte slice, that is, the
// total space allocated for the buffer's data.
func (b *Buffer) Cap() int { return cap(b.buf) }

// Available returns how many bytes are unused in the buffer.
func (b *Buffer) Available() int { return cap(b.buf) - len(b.buf) }

		}

		if tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt); ok {
			tc.FuncName = "s3.MaxClients"
		}

		w.Header().Set("X-RateLimit-Limit", strconv.Itoa(cap(pool)))
		w.Header().Set("X-RateLimit-Remaining", strconv.Itoa(cap(pool)-len(pool)))

		ctx := r.Context()
		select {
		case pool <- struct{}{}:
			defer func() { <-pool }()
			globalHTTPStats.addRequestsInQueue(-1)

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.SmbNegotiationResponse#haveCapabilitiy(int)
     */
    @Override
    public boolean haveCapabilitiy ( int cap ) {
        return ( this.capabilities & cap ) == cap;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.SmbNegotiationResponse#isDFSSupported()
     */
    @Override

				return
			}
		case "rss":
			var zb0002 uint32
			zb0002, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "PoolStats")
				return
			}
			if cap(z.PoolStats) >= int(zb0002) {
				z.PoolStats = (z.PoolStats)[:zb0002]
			} else {
				z.PoolStats = make([]*rebalanceStats, zb0002)
			}
			for za0001 := range z.PoolStats {
				if dc.IsNil() {

				return
			}
		case "bkts":
			var zb0002 uint32
			zb0002, err = dc.ReadArrayHeader()
			if err != nil {
				err = msgp.WrapError(err, "QueuedBuckets")
				return
			}
			if cap(z.QueuedBuckets) >= int(zb0002) {
				z.QueuedBuckets = (z.QueuedBuckets)[:zb0002]
			} else {
				z.QueuedBuckets = make([]string, zb0002)
			}
			for za0001 := range z.QueuedBuckets {

func exponentialBackoffWait(r *rand.Rand, unit, cap time.Duration) func(uint) time.Duration {
	if unit > time.Hour {
		// Protect against integer overflow
		panic("unit cannot exceed one hour")
	}
	return func(attempt uint) time.Duration {
		if attempt > 16 {
			// Protect against integer overflow
			attempt = 16
		}
		// sleep = random_between(unit, min(cap, base * 2 ** attempt))