forked from Kong/go-kong
/
target_service.go
197 lines (176 loc) · 5.47 KB
/
target_service.go
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package kong
import (
"context"
"encoding/json"
"fmt"
)
// AbstractTargetService handles Targets in Kong.
type AbstractTargetService interface {
// Create creates a Target in Kong under upstreamID.
Create(ctx context.Context, upstreamNameOrID *string, target *Target) (*Target, error)
// Delete deletes a Target in Kong
Delete(ctx context.Context, upstreamNameOrID *string, targetOrID *string) error
// List fetches a list of Targets in Kong.
List(ctx context.Context, upstreamNameOrID *string, opt *ListOpt) ([]*Target, *ListOpt, error)
// ListAll fetches all Targets in Kong for an upstream.
ListAll(ctx context.Context, upstreamNameOrID *string) ([]*Target, error)
// MarkHealthy marks target belonging to upstreamNameOrID as healthy in
// Kong's load balancer.
MarkHealthy(ctx context.Context, upstreamNameOrID *string, target *Target) error
// MarkUnhealthy marks target belonging to upstreamNameOrID as unhealthy in
// Kong's load balancer.
MarkUnhealthy(ctx context.Context, upstreamNameOrID *string, target *Target) error
}
// TargetService handles Targets in Kong.
type TargetService service
// TODO foreign key can be read directly from the embedded key itself
// upstreamNameOrID need not be an explicit parameter.
// Create creates a Target in Kong under upstreamID.
// If an ID is specified, it will be used to
// create a target in Kong, otherwise an ID
// is auto-generated.
func (s *TargetService) Create(ctx context.Context,
upstreamNameOrID *string, target *Target,
) (*Target, error) {
if isEmptyString(upstreamNameOrID) {
return nil, fmt.Errorf("upstreamNameOrID can not be nil")
}
queryPath := "/upstreams/" + *upstreamNameOrID + "/targets"
method := "POST"
// if target.ID != nil {
// queryPath = queryPath + "/" + *target.ID
// method = "PUT"
// }
req, err := s.client.NewRequest(method, queryPath, nil, target)
if err != nil {
return nil, err
}
var createdTarget Target
_, err = s.client.Do(ctx, req, &createdTarget)
if err != nil {
return nil, err
}
return &createdTarget, nil
}
// Delete deletes a Target in Kong
func (s *TargetService) Delete(ctx context.Context,
upstreamNameOrID *string, targetOrID *string,
) error {
if isEmptyString(upstreamNameOrID) {
return fmt.Errorf("upstreamNameOrID cannot be nil for Get operation")
}
if isEmptyString(targetOrID) {
return fmt.Errorf("targetOrID cannot be nil for Delete operation")
}
endpoint := fmt.Sprintf("/upstreams/%v/targets/%v",
*upstreamNameOrID, *targetOrID)
req, err := s.client.NewRequest("DELETE", endpoint, nil, nil)
if err != nil {
return err
}
_, err = s.client.Do(ctx, req, nil)
return err
}
// List fetches a list of Targets in Kong.
// opt can be used to control pagination.
func (s *TargetService) List(ctx context.Context,
upstreamNameOrID *string, opt *ListOpt,
) ([]*Target, *ListOpt, error) {
if isEmptyString(upstreamNameOrID) {
return nil, nil, fmt.Errorf(
"upstreamNameOrID cannot be nil for Get operation")
}
data, next, err := s.client.list(ctx,
"/upstreams/"+*upstreamNameOrID+"/targets", opt)
if err != nil {
return nil, nil, err
}
var targets []*Target
for _, object := range data {
b, err := object.MarshalJSON()
if err != nil {
return nil, nil, err
}
var target Target
err = json.Unmarshal(b, &target)
if err != nil {
return nil, nil, err
}
targets = append(targets, &target)
}
return targets, next, nil
}
// ListAll fetches all Targets in Kong for an upstream.
func (s *TargetService) ListAll(ctx context.Context,
upstreamNameOrID *string,
) ([]*Target, error) {
var targets, data []*Target
var err error
opt := &ListOpt{Size: pageSize}
for opt != nil {
data, opt, err = s.List(ctx, upstreamNameOrID, opt)
if err != nil {
return nil, err
}
targets = append(targets, data...)
}
return targets, nil
}
// MarkHealthy marks target belonging to upstreamNameOrID as healthy in
// Kong's load balancer.
func (s *TargetService) MarkHealthy(ctx context.Context,
upstreamNameOrID *string, target *Target,
) error {
if target == nil {
return fmt.Errorf("cannot set health status for a nil target")
}
if isEmptyString(target.ID) && isEmptyString(target.Target) {
return fmt.Errorf("need at least one of target or ID to" +
" set health status")
}
if isEmptyString(upstreamNameOrID) {
return fmt.Errorf("upstreamNameOrID cannot be nil " +
"for updating health check")
}
tid := target.ID
if target.ID == nil {
tid = target.Target
}
endpoint := fmt.Sprintf("/upstreams/%v/targets/%v/healthy",
*upstreamNameOrID, *tid)
req, err := s.client.NewRequest("POST", endpoint, nil, nil)
if err != nil {
return err
}
_, err = s.client.Do(ctx, req, nil)
return err
}
// MarkUnhealthy marks target belonging to upstreamNameOrID as unhealthy in
// Kong's load balancer.
func (s *TargetService) MarkUnhealthy(ctx context.Context,
upstreamNameOrID *string, target *Target,
) error {
if target == nil {
return fmt.Errorf("cannot set health status for a nil target")
}
if isEmptyString(target.ID) && isEmptyString(target.Target) {
return fmt.Errorf("need at least one of target or ID to" +
" set health status")
}
if isEmptyString(upstreamNameOrID) {
return fmt.Errorf("upstreamNameOrID cannot be nil " +
"for updating health check")
}
tid := target.ID
if target.ID == nil {
tid = target.Target
}
endpoint := fmt.Sprintf("/upstreams/%v/targets/%v/unhealthy",
*upstreamNameOrID, *tid)
req, err := s.client.NewRequest("POST", endpoint, nil, nil)
if err != nil {
return err
}
_, err = s.client.Do(ctx, req, nil)
return err
}