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resource_aws_waf_rule.go
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resource_aws_waf_rule.go
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package aws
import (
"fmt"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/waf"
"github.com/hashicorp/terraform/helper/schema"
)
func resourceAwsWafRule() *schema.Resource {
return &schema.Resource{
Create: resourceAwsWafRuleCreate,
Read: resourceAwsWafRuleRead,
Update: resourceAwsWafRuleUpdate,
Delete: resourceAwsWafRuleDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"metric_name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"predicates": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"negated": &schema.Schema{
Type: schema.TypeBool,
Required: true,
},
"data_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
value := v.(string)
if len(value) > 128 {
errors = append(errors, fmt.Errorf(
"%q cannot be longer than 128 characters", k))
}
return
},
},
"type": &schema.Schema{
Type: schema.TypeString,
Required: true,
ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
value := v.(string)
if value != "IPMatch" && value != "ByteMatch" && value != "SqlInjectionMatch" && value != "SizeConstraint" && value != "XssMatch" {
errors = append(errors, fmt.Errorf(
"%q must be one of IPMatch | ByteMatch | SqlInjectionMatch | SizeConstraint | XssMatch", k))
}
return
},
},
},
},
},
},
}
}
func resourceAwsWafRuleCreate(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).wafconn
// ChangeToken
var ct *waf.GetChangeTokenInput
res, err := conn.GetChangeToken(ct)
if err != nil {
return fmt.Errorf("Error getting change token: %s", err)
}
params := &waf.CreateRuleInput{
ChangeToken: res.ChangeToken,
MetricName: aws.String(d.Get("metric_name").(string)),
Name: aws.String(d.Get("name").(string)),
}
resp, err := conn.CreateRule(params)
if err != nil {
return err
}
d.SetId(*resp.Rule.RuleId)
return resourceAwsWafRuleUpdate(d, meta)
}
func resourceAwsWafRuleRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).wafconn
params := &waf.GetRuleInput{
RuleId: aws.String(d.Id()),
}
resp, err := conn.GetRule(params)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok && awsErr.Code() == "WAFNonexistentItemException" {
log.Printf("[WARN] WAF Rule (%s) not found, error code (404)", d.Id())
d.SetId("")
return nil
}
return err
}
var predicates []map[string]interface{}
for _, predicateSet := range resp.Rule.Predicates {
predicate := map[string]interface{}{
"negated": *predicateSet.Negated,
"type": *predicateSet.Type,
"data_id": *predicateSet.DataId,
}
predicates = append(predicates, predicate)
}
d.Set("predicates", predicates)
d.Set("name", resp.Rule.Name)
d.Set("metric_name", resp.Rule.MetricName)
return nil
}
func resourceAwsWafRuleUpdate(d *schema.ResourceData, meta interface{}) error {
err := updateWafRuleResource(d, meta, waf.ChangeActionInsert)
if err != nil {
return fmt.Errorf("Error Updating WAF Rule: %s", err)
}
return resourceAwsWafRuleRead(d, meta)
}
func resourceAwsWafRuleDelete(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*AWSClient).wafconn
err := updateWafRuleResource(d, meta, waf.ChangeActionDelete)
if err != nil {
return fmt.Errorf("Error Removing WAF Rule Predicates: %s", err)
}
// ChangeToken
var ct *waf.GetChangeTokenInput
resp, err := conn.GetChangeToken(ct)
req := &waf.DeleteRuleInput{
ChangeToken: resp.ChangeToken,
RuleId: aws.String(d.Id()),
}
log.Printf("[INFO] Deleting WAF Rule")
_, err = conn.DeleteRule(req)
if err != nil {
return fmt.Errorf("Error deleting WAF Rule: %s", err)
}
return nil
}
func updateWafRuleResource(d *schema.ResourceData, meta interface{}, ChangeAction string) error {
conn := meta.(*AWSClient).wafconn
// ChangeToken
var ct *waf.GetChangeTokenInput
resp, err := conn.GetChangeToken(ct)
if err != nil {
return fmt.Errorf("Error getting change token: %s", err)
}
req := &waf.UpdateRuleInput{
ChangeToken: resp.ChangeToken,
RuleId: aws.String(d.Id()),
}
predicatesSet := d.Get("predicates").(*schema.Set)
for _, predicateI := range predicatesSet.List() {
predicate := predicateI.(map[string]interface{})
updatePredicate := &waf.RuleUpdate{
Action: aws.String(ChangeAction),
Predicate: &waf.Predicate{
Negated: aws.Bool(predicate["negated"].(bool)),
Type: aws.String(predicate["type"].(string)),
DataId: aws.String(predicate["data_id"].(string)),
},
}
req.Updates = append(req.Updates, updatePredicate)
}
_, err = conn.UpdateRule(req)
if err != nil {
return fmt.Errorf("Error Updating WAF Rule: %s", err)
}
return nil
}