hack: Support parsing empty object as empty array

See also Kong/kong#2309.

kong/resource_kong_api.go

@@ -1,6 +1,7 @@
 package kong
 
 import (
+ "encoding/json"
  "fmt"
  "net/http"
  "strings"
@@ -29,20 +30,58 @@ type APIRequest struct {
 
 // APIResponse : Kong API response object structure
 type APIResponse struct {
- ID string `json:"id,omitempty"`
- Name string `json:"name"`
- Hosts []string `json:"hosts,omitempty"`
- Uris []string `json:"uris,omitempty"`
- Methods []string `json:"methods,omitempty"`
- UpstreamURL string `json:"upstream_url"`
- StripURI bool `json:"strip_uri"`
- PreserveHost bool `json:"preserve_host"`
- Retries int `json:"retries,omitempty"`
- UpstreamConnectTimeout int `json:"upstream_connect_timeout,omitempty"`
- UpstreamSendTimeout int `json:"upstream_send_timeout,omitempty"`
- UpstreamReadTimeout int `json:"upstream_read_timeout,omitempty"`
- HTTPSOnly bool `json:"https_only"`
- HTTPIfTerminated bool `json:"http_if_terminated"`
+ ID string `json:"id,omitempty"`
+ Name string `json:"name"`
+ UpstreamURL string `json:"upstream_url"`
+ StripURI bool `json:"strip_uri"`
+ PreserveHost bool `json:"preserve_host"`
+ Retries int `json:"retries,omitempty"`
+ UpstreamConnectTimeout int `json:"upstream_connect_timeout,omitempty"`
+ UpstreamSendTimeout int `json:"upstream_send_timeout,omitempty"`
+ UpstreamReadTimeout int `json:"upstream_read_timeout,omitempty"`
+ HTTPSOnly bool `json:"https_only"`
+ HTTPIfTerminated bool `json:"http_if_terminated"`
+
+ // These will be set in our UnmarshalJSON function.
+ Hosts []string `json:"-"`
+ Methods []string `json:"-"`
+ Uris []string `json:"-"`
+}
+
+func (r *APIResponse) UnmarshalJSON(data []byte) error {
+ type Alias APIResponse
+ wrapped := &struct {
+ RawHosts interface{} `json:"hosts,omitempty"`
+ RawMethods interface{} `json:"methods,omitempty"`
+ RawUris interface{} `json:"uris,omitempty"`
+ *Alias
+ }{
+ Alias: (*Alias)(r),
+ }
+
+ if err := json.Unmarshal(data, &wrapped); err != nil {
+ return err
+ }
+
+ if hosts, ok := wrapped.RawHosts.([]interface{}); ok {
+ for _, host := range hosts {
+ r.Hosts = append(r.Hosts, host.(string))
+ }
+ }
+
+ if methods, ok := wrapped.RawMethods.([]interface{}); ok {
+ for _, method := range methods {
+ r.Methods = append(r.Methods, method.(string))
+ }
+ }
+
+ if uris, ok := wrapped.RawUris.([]interface{}); ok {
+ for _, uri := range uris {
+ r.Uris = append(r.Uris, uri.(string))
+ }
+ }
+
+ return nil
 }
 
 type APICreateError struct {
@@ -273,9 +312,9 @@ func getAPIFromResourceData(d *schema.ResourceData) *APIRequest {
 func setAPIToResourceData(d *schema.ResourceData, api *APIResponse) {
  d.SetId(api.ID)
  d.Set("name", api.Name)
- d.Set("hosts", api.Hosts)
+ d.Set("hosts", strings.Join(api.Hosts, ","))
  d.Set("uris", strings.Join(api.Uris, ","))
- d.Set("methods", api.Methods)
+ d.Set("methods", strings.Join(api.Methods, ","))
  d.Set("upstream_url", api.UpstreamURL)
  d.Set("strip_uri", api.StripURI)
  d.Set("preserve_host", api.PreserveHost)