/
http.go
223 lines (194 loc) · 5.72 KB
/
http.go
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package wait
import (
"bytes"
"context"
"crypto/tls"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"strconv"
"time"
"github.com/docker/go-connections/nat"
)
// Implement interface
var _ Strategy = (*HTTPStrategy)(nil)
type HTTPStrategy struct {
// all Strategies should have a startupTimeout to avoid waiting infinitely
startupTimeout time.Duration
// additional properties
Port nat.Port
Path string
StatusCodeMatcher func(status int) bool
ResponseMatcher func(body io.Reader) bool
UseTLS bool
AllowInsecure bool
TLSConfig *tls.Config // TLS config for HTTPS
Method string // http method
Body io.Reader // http request body
PollInterval time.Duration
}
// NewHTTPStrategy constructs a HTTP strategy waiting on port 80 and status code 200
func NewHTTPStrategy(path string) *HTTPStrategy {
return &HTTPStrategy{
startupTimeout: defaultStartupTimeout(),
Port: "80/tcp",
Path: path,
StatusCodeMatcher: defaultStatusCodeMatcher,
ResponseMatcher: func(body io.Reader) bool { return true },
UseTLS: false,
TLSConfig: nil,
Method: http.MethodGet,
Body: nil,
PollInterval: defaultPollInterval(),
}
}
func defaultStatusCodeMatcher(status int) bool {
return status == http.StatusOK
}
// fluent builders for each property
// since go has neither covariance nor generics, the return type must be the type of the concrete implementation
// this is true for all properties, even the "shared" ones like startupTimeout
func (ws *HTTPStrategy) WithStartupTimeout(startupTimeout time.Duration) *HTTPStrategy {
ws.startupTimeout = startupTimeout
return ws
}
func (ws *HTTPStrategy) WithPort(port nat.Port) *HTTPStrategy {
ws.Port = port
return ws
}
func (ws *HTTPStrategy) WithStatusCodeMatcher(statusCodeMatcher func(status int) bool) *HTTPStrategy {
ws.StatusCodeMatcher = statusCodeMatcher
return ws
}
func (ws *HTTPStrategy) WithResponseMatcher(matcher func(body io.Reader) bool) *HTTPStrategy {
ws.ResponseMatcher = matcher
return ws
}
func (ws *HTTPStrategy) WithTLS(useTLS bool, tlsconf ...*tls.Config) *HTTPStrategy {
ws.UseTLS = useTLS
if useTLS && len(tlsconf) > 0 {
ws.TLSConfig = tlsconf[0]
}
return ws
}
func (ws *HTTPStrategy) WithAllowInsecure(allowInsecure bool) *HTTPStrategy {
ws.AllowInsecure = allowInsecure
return ws
}
func (ws *HTTPStrategy) WithMethod(method string) *HTTPStrategy {
ws.Method = method
return ws
}
func (ws *HTTPStrategy) WithBody(reqdata io.Reader) *HTTPStrategy {
ws.Body = reqdata
return ws
}
// WithPollInterval can be used to override the default polling interval of 100 milliseconds
func (ws *HTTPStrategy) WithPollInterval(pollInterval time.Duration) *HTTPStrategy {
ws.PollInterval = pollInterval
return ws
}
// ForHTTP is a convenience method similar to Wait.java
// https://github.com/testcontainers/testcontainers-java/blob/1d85a3834bd937f80aad3a4cec249c027f31aeb4/core/src/main/java/org/testcontainers/containers/wait/strategy/Wait.java
func ForHTTP(path string) *HTTPStrategy {
return NewHTTPStrategy(path)
}
// WaitUntilReady implements Strategy.WaitUntilReady
func (ws *HTTPStrategy) WaitUntilReady(ctx context.Context, target StrategyTarget) (err error) {
// limit context to startupTimeout
ctx, cancelContext := context.WithTimeout(ctx, ws.startupTimeout)
defer cancelContext()
ipAddress, err := target.Host(ctx)
if err != nil {
return
}
var port nat.Port
port, err = target.MappedPort(ctx, ws.Port)
for port == "" {
select {
case <-ctx.Done():
return fmt.Errorf("%s:%w", ctx.Err(), err)
case <-time.After(ws.PollInterval):
port, err = target.MappedPort(ctx, ws.Port)
}
}
if port.Proto() != "tcp" {
return errors.New("Cannot use HTTP client on non-TCP ports")
}
switch ws.Method {
case http.MethodGet, http.MethodHead, http.MethodPost,
http.MethodPut, http.MethodPatch, http.MethodDelete,
http.MethodConnect, http.MethodOptions, http.MethodTrace:
default:
if ws.Method != "" {
return fmt.Errorf("invalid http method %q", ws.Method)
}
ws.Method = http.MethodGet
}
tripper := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
}).DialContext,
ForceAttemptHTTP2: true,
MaxIdleConns: 100,
IdleConnTimeout: 90 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
TLSClientConfig: ws.TLSConfig,
}
var proto string
if ws.UseTLS {
proto = "https"
if ws.AllowInsecure {
if ws.TLSConfig == nil {
tripper.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
} else {
ws.TLSConfig.InsecureSkipVerify = true
}
}
} else {
proto = "http"
}
client := http.Client{Transport: tripper, Timeout: time.Second}
address := net.JoinHostPort(ipAddress, strconv.Itoa(port.Int()))
endpoint := fmt.Sprintf("%s://%s%s", proto, address, ws.Path)
// cache the body into a byte-slice so that it can be iterated over multiple times
var body []byte
if ws.Body != nil {
body, err = ioutil.ReadAll(ws.Body)
if err != nil {
return
}
}
for {
select {
case <-ctx.Done():
return ctx.Err()
case <-time.After(ws.PollInterval):
req, err := http.NewRequestWithContext(ctx, ws.Method, endpoint, bytes.NewReader(body))
if err != nil {
return err
}
resp, err := client.Do(req)
if err != nil {
continue
}
if ws.StatusCodeMatcher != nil && !ws.StatusCodeMatcher(resp.StatusCode) {
continue
}
if ws.ResponseMatcher != nil && !ws.ResponseMatcher(resp.Body) {
continue
}
if err := resp.Body.Close(); err != nil {
continue
}
return nil
}
}
}