Context timeouts are propagated, and a default timeout of 1 minute is added if none is specified.

There is no cancellation propagation for single payload requests.
When the context is canceled, the request will return at once with an appropriate error. 
However, the remote call will not see the cancellation - as can be seen from the 'missing' context on the handler.
The result will be discarded.

### Typed handlers

				if unlock, ok := val.(chan struct{}); ok && unlock != nil {
					// Wait until unfrozen.
					select {
					case <-unlock:
					case <-r.Context().Done():
						// if client canceled we don't need to wait here forever.
						return
					}
				}
			}
		}

		globalHTTPStats.addRequestsInQueue(1)
		pool := globalAPIConfig.getRequestsPool()
		if pool == nil {

		}
	}
}

// returns overall resync status from individual bucket resync status map
func siteResyncStatus(currSt ResyncStatusType, m map[string]ResyncStatusType) ResyncStatusType {
	// avoid overwriting canceled resync status
	if currSt != ResyncStarted {
		return currSt
	}
	totBuckets := len(m)
	var cmpCount, failCount int
	for _, st := range m {
		switch st {
		case ResyncCompleted:
			cmpCount++

			retErr = err
		}

		if retErr != nil {
			healingLogIf(ctx, fmt.Errorf("listing failed with: %v on bucket: %v", retErr, bucket))
			continue
		}

		select {
		// If context is canceled don't mark as done...
		case <-ctx.Done():
			return ctx.Err()
		default:
			tracker.bucketDone(bucket)
			healingLogIf(ctx, tracker.update(ctx))
		}
	}
	if retErr != nil {
		return retErr
	}

pkg context, type Context interface, Done() <-chan struct
pkg context, type Context interface, Err() error
pkg context, type Context interface, Value(interface{}) interface{}
pkg context, var Canceled error
pkg context, var DeadlineExceeded error
pkg crypto/tls, const RenegotiateFreelyAsClient = 2
pkg crypto/tls, const RenegotiateFreelyAsClient RenegotiationSupport
pkg crypto/tls, const RenegotiateNever = 0

type ResyncStatusType int

const (
	// NoResync - no resync in progress
	NoResync ResyncStatusType = iota
	// ResyncPending - resync pending
	ResyncPending
	// ResyncCanceled - resync canceled
	ResyncCanceled
	// ResyncStarted -  resync in progress
	ResyncStarted
	// ResyncCompleted -  resync finished
	ResyncCompleted
	// ResyncFailed -  resync failed
	ResyncFailed
)

				lockRefreshed++
			} else {
				lockNotFound++
			}
			if lockRefreshed >= quorum || lockNotFound > len(restClnts)-quorum {
				done = true
			}
		case <-ctx.Done():
			// Refreshing is canceled
			return false, ctx.Err()
		}
		if done {
			break
		}
	}

	// We may have some unused results in ch, release them async.
	go func() {
		wg.Wait()
		xioutil.SafeClose(ch)

				}
				if opts.Recursive {
					// Scan folder we found. Should be in correct sort order where we are.
					err := scanDir(pop)
					if err != nil && !IsErrIgnored(err, context.Canceled) {
						internalLogIf(ctx, err)
					}
				}
				dirStack = dirStack[:len(dirStack)-1]
			}

			// All objects will be returned as directories, there has been no object check yet.

    if (!newRouteSelector.hasNext()) throw IOException("exhausted all routes")
    val newRouteSelection = newRouteSelector.next()
    routeSelection = newRouteSelection

    if (isCanceled()) throw IOException("Canceled")

    return planConnectToRoute(newRouteSelection.next(), newRouteSelection.routes)
  }

  /**
   * Returns a plan to reuse a pooled connection, or null if the pool doesn't have a connection for

| `minio_s3_requests_5xx_errors_total`          | Total number S3 requests with (5xx) errors.              |
| `minio_s3_requests_canceled_total`            | Total number S3 requests canceled by the client.         |
| `minio_s3_requests_errors_total`              | Total number S3 requests with (4xx and 5xx) errors.      |