traefik/integration/try/condition.go

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package try
import (
"errors"
"fmt"
"io/ioutil"
"net/http"
"strings"
"github.com/abronan/valkeyrie/store"
)
// ResponseCondition is a retry condition function.
// It receives a response, and returns an error
// if the response failed the condition.
type ResponseCondition func(*http.Response) error
// BodyContains returns a retry condition function.
// The condition returns an error if the request body does not contain all the given
// strings.
func BodyContains(values ...string) ResponseCondition {
return func(res *http.Response) error {
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return fmt.Errorf("failed to read response body: %s", err)
}
for _, value := range values {
if !strings.Contains(string(body), value) {
return fmt.Errorf("could not find '%s' in body '%s'", value, string(body))
}
}
return nil
}
}
// BodyNotContains returns a retry condition function.
// The condition returns an error if the request body contain one of the given
// strings.
func BodyNotContains(values ...string) ResponseCondition {
return func(res *http.Response) error {
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return fmt.Errorf("failed to read response body: %s", err)
}
for _, value := range values {
if strings.Contains(string(body), value) {
return fmt.Errorf("find '%s' in body '%s'", value, string(body))
}
}
return nil
}
}
// BodyContainsOr returns a retry condition function.
// The condition returns an error if the request body does not contain one of the given
// strings.
func BodyContainsOr(values ...string) ResponseCondition {
return func(res *http.Response) error {
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return fmt.Errorf("failed to read response body: %s", err)
}
for _, value := range values {
if strings.Contains(string(body), value) {
return nil
}
}
return fmt.Errorf("could not find '%v' in body '%s'", values, string(body))
}
}
// HasBody returns a retry condition function.
// The condition returns an error if the request body does not have body content.
func HasBody() ResponseCondition {
return func(res *http.Response) error {
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return fmt.Errorf("failed to read response body: %s", err)
}
if len(body) == 0 {
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return errors.New("response doesn't have body content")
}
return nil
}
}
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// HasCn returns a retry condition function.
// The condition returns an error if the cn is not correct.
func HasCn(cn string) ResponseCondition {
return func(res *http.Response) error {
if res.TLS == nil {
return errors.New("response doesn't have TLS")
}
if len(res.TLS.PeerCertificates) == 0 {
return errors.New("response TLS doesn't have peer certificates")
}
if res.TLS.PeerCertificates[0] == nil {
return errors.New("first peer certificate is nil")
}
commonName := res.TLS.PeerCertificates[0].Subject.CommonName
if cn != commonName {
return fmt.Errorf("common name don't match: %s != %s", cn, commonName)
}
return nil
}
}
// StatusCodeIs returns a retry condition function.
// The condition returns an error if the given response's status code is not the
// given HTTP status code.
func StatusCodeIs(status int) ResponseCondition {
return func(res *http.Response) error {
if res.StatusCode != status {
return fmt.Errorf("got status code %d, wanted %d", res.StatusCode, status)
}
return nil
}
}
// DoCondition is a retry condition function.
// It returns an error
type DoCondition func() error
// KVExists is a retry condition function.
// Verify if a Key exists in the store
func KVExists(kv store.Store, key string) DoCondition {
return func() error {
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_, err := kv.Exists(key, nil)
return err
}
}