forked from mystiq/dex
147 lines
3.4 KiB
Go
147 lines
3.4 KiB
Go
package wait
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import (
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"context"
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"crypto/tls"
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"errors"
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"fmt"
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"net"
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"net/http"
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"strconv"
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"time"
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"github.com/docker/go-connections/nat"
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)
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// Implement interface
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var _ Strategy = (*HTTPStrategy)(nil)
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type HTTPStrategy struct {
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// all Strategies should have a startupTimeout to avoid waiting infinitely
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startupTimeout time.Duration
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// additional properties
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Port nat.Port
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Path string
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StatusCodeMatcher func(status int) bool
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UseTLS bool
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AllowInsecure bool
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}
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// NewHTTPStrategy constructs a HTTP strategy waiting on port 80 and status code 200
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func NewHTTPStrategy(path string) *HTTPStrategy {
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return &HTTPStrategy{
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startupTimeout: defaultStartupTimeout(),
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Port: "80/tcp",
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Path: path,
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StatusCodeMatcher: defaultStatusCodeMatcher,
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UseTLS: false,
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}
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}
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func defaultStatusCodeMatcher(status int) bool {
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return status == http.StatusOK
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}
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// fluent builders for each property
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// since go has neither covariance nor generics, the return type must be the type of the concrete implementation
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// this is true for all properties, even the "shared" ones like startupTimeout
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func (ws *HTTPStrategy) WithStartupTimeout(startupTimeout time.Duration) *HTTPStrategy {
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ws.startupTimeout = startupTimeout
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return ws
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}
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func (ws *HTTPStrategy) WithPort(port nat.Port) *HTTPStrategy {
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ws.Port = port
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return ws
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}
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func (ws *HTTPStrategy) WithStatusCodeMatcher(statusCodeMatcher func(status int) bool) *HTTPStrategy {
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ws.StatusCodeMatcher = statusCodeMatcher
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return ws
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}
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func (ws *HTTPStrategy) WithTLS(useTLS bool) *HTTPStrategy {
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ws.UseTLS = useTLS
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return ws
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}
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func (ws *HTTPStrategy) WithAllowInsecure(allowInsecure bool) *HTTPStrategy {
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ws.AllowInsecure = allowInsecure
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return ws
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}
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// ForHTTP is a convenience method similar to Wait.java
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// https://github.com/testcontainers/testcontainers-java/blob/1d85a3834bd937f80aad3a4cec249c027f31aeb4/core/src/main/java/org/testcontainers/containers/wait/strategy/Wait.java
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func ForHTTP(path string) *HTTPStrategy {
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return NewHTTPStrategy(path)
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}
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// WaitUntilReady implements Strategy.WaitUntilReady
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func (ws *HTTPStrategy) WaitUntilReady(ctx context.Context, target StrategyTarget) (err error) {
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// limit context to startupTimeout
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ctx, cancelContext := context.WithTimeout(ctx, ws.startupTimeout)
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defer cancelContext()
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ipAddress, err := target.Host(ctx)
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if err != nil {
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return
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}
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port, err := target.MappedPort(ctx, ws.Port)
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if err != nil {
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return
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}
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if port.Proto() != "tcp" {
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return errors.New("Cannot use HTTP client on non-TCP ports")
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}
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portNumber := port.Int()
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portString := strconv.Itoa(portNumber)
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address := net.JoinHostPort(ipAddress, portString)
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var proto string
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if ws.UseTLS {
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proto = "https"
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} else {
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proto = "http"
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}
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url := fmt.Sprintf("%s://%s%s", proto, address, ws.Path)
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tripper := http.DefaultTransport
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if ws.AllowInsecure {
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tripper.(*http.Transport).TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
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}
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client := http.Client{Timeout: ws.startupTimeout, Transport: tripper}
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return err
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}
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req = req.WithContext(ctx)
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Retry:
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for {
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select {
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case <-ctx.Done():
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break Retry
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default:
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resp, err := client.Do(req)
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if err != nil || !ws.StatusCodeMatcher(resp.StatusCode) {
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time.Sleep(100 * time.Millisecond)
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continue
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}
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break Retry
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}
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}
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return nil
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}
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