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data_source_waf_rules.go
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data_source_waf_rules.go
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package fastly
import (
"errors"
"fmt"
"log"
"sort"
"strconv"
gofastly "github.com/fastly/go-fastly/v2/fastly"
"github.com/hashicorp/terraform-plugin-sdk/helper/hashcode"
"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
)
func dataSourceFastlyWAFRules() *schema.Resource {
return &schema.Resource{
Read: dataSourceFastlyWAFRulesRead,
Schema: map[string]*schema.Schema{
"publishers": {
Type: schema.TypeList,
Optional: true,
Description: "A list of publishers to be used as filters for the data set.",
Elem: &schema.Schema{Type: schema.TypeString},
},
"tags": {
Type: schema.TypeList,
Optional: true,
Description: "A list of tags to be used as filters for the data set.",
Elem: &schema.Schema{Type: schema.TypeString},
},
"exclude_modsec_rule_ids": {
Type: schema.TypeList,
Optional: true,
Description: "A list of modsecurity rules IDs to be excluded from the data set.",
Elem: &schema.Schema{Type: schema.TypeInt},
},
"rules": {
Type: schema.TypeList,
Computed: true,
Description: "The list of rules that results from any given combination of filters.",
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
"modsec_rule_id": {
Type: schema.TypeInt,
Required: true,
Description: "The modsecurity rule ID.",
},
"latest_revision_number": {
Type: schema.TypeInt,
Required: true,
Description: "The modsecurity rule's latest revision.",
},
"type": {
Type: schema.TypeString,
Computed: true,
Description: "The modsecurity rule's type.",
},
},
},
},
},
}
}
func dataSourceFastlyWAFRulesRead(d *schema.ResourceData, meta interface{}) error {
conn := meta.(*FastlyClient).conn
input := &gofastly.ListAllWAFRulesInput{}
if v, ok := d.GetOk("publishers"); ok {
l := v.([]interface{})
for i := range l {
input.FilterPublishers = append(input.FilterPublishers, l[i].(string))
}
}
if v, ok := d.GetOk("tags"); ok {
l := v.([]interface{})
for i := range l {
input.FilterTagNames = append(input.FilterTagNames, l[i].(string))
}
}
if v, ok := d.GetOk("exclude_modsec_rule_ids"); ok {
l := v.([]interface{})
for i := range l {
input.ExcludeMocSecIDs = append(input.ExcludeMocSecIDs, l[i].(int))
}
}
log.Printf("[INFO] Reading WAF rules with ops: %#v", input)
res, err := conn.ListAllWAFRules(input)
if err != nil {
return fmt.Errorf("error listing WAF rules: %s", err)
}
rules := flattenWAFRules(res.Items)
d.SetId(strconv.Itoa(createFiltersHash(input)))
if err := d.Set("rules", rules); err != nil {
return fmt.Errorf("error setting WAF rules: %s", err)
}
return nil
}
func createFiltersHash(i *gofastly.ListAllWAFRulesInput) int {
var result string
for _, v := range i.FilterPublishers {
result = result + v
}
for _, v := range i.FilterTagNames {
result = result + v
}
for _, v := range i.ExcludeMocSecIDs {
result = result + strconv.Itoa(v)
}
return hashcode.String(result)
}
func flattenWAFRules(ruleList []*gofastly.WAFRule) []map[string]interface{} {
rl := make([]map[string]interface{}, len(ruleList))
if len(ruleList) == 0 {
return rl
}
for i, r := range ruleList {
latestRevisionNumber := 1
if latestRevision, err := determineLatestRuleRevision(r.Revisions); err == nil {
latestRevisionNumber = latestRevision.Revision
}
rulesMapString := map[string]interface{}{
"modsec_rule_id": r.ModSecID,
"latest_revision_number": latestRevisionNumber,
"type": r.Type,
}
// Prune any empty values that come from the default string value in structs.
for k, v := range rulesMapString {
if v == "" {
delete(rulesMapString, k)
}
}
rl[i] = rulesMapString
}
return rl
}
func determineLatestRuleRevision(revisions []*gofastly.WAFRuleRevision) (*gofastly.WAFRuleRevision, error) {
if len(revisions) == 0 {
return nil, errors.New("the list of WAFRuleRevisions cannot be empty")
}
sort.Slice(revisions, func(i, j int) bool {
return revisions[i].Revision > revisions[j].Revision
})
return revisions[0], nil
}