633 lines
20 KiB
Go
633 lines
20 KiB
Go
package agent
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import (
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"fmt"
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"net/http"
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"strings"
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"github.com/hashicorp/consul/acl"
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cachetype "github.com/hashicorp/consul/agent/cache-types"
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"github.com/hashicorp/consul/agent/consul"
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"github.com/hashicorp/consul/agent/structs"
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)
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// /v1/connect/intentions
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func (s *HTTPHandlers) IntentionEndpoint(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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switch req.Method {
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case "GET":
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return s.IntentionList(resp, req)
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case "POST":
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return s.IntentionCreate(resp, req)
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default:
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return nil, MethodNotAllowedError{req.Method, []string{"GET", "POST"}}
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}
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}
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// GET /v1/connect/intentions
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func (s *HTTPHandlers) IntentionList(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Method is tested in IntentionEndpoint
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var args structs.IntentionListRequest
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil {
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return nil, err
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}
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var reply structs.IndexedIntentions
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defer setMeta(resp, &reply.QueryMeta)
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if err := s.agent.RPC(req.Context(), "Intention.List", &args, &reply); err != nil {
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return nil, err
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}
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return reply.Intentions, nil
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}
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// IntentionCreate is used to create legacy intentions.
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// Deprecated: use IntentionPutExact.
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func (s *HTTPHandlers) IntentionCreate(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Method is tested in IntentionEndpoint
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var entMeta acl.EnterpriseMeta
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if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
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return nil, err
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}
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if entMeta.PartitionOrDefault() != acl.PartitionOrDefault("") {
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return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Cannot use a partition with this endpoint"}
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}
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args := structs.IntentionRequest{
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Op: structs.IntentionOpCreate,
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}
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s.parseDC(req, &args.Datacenter)
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s.parseToken(req, &args.Token)
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if err := decodeBody(req.Body, &args.Intention); err != nil {
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return nil, fmt.Errorf("Failed to decode request body: %s", err)
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}
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if args.Intention.DestinationPartition != "" && args.Intention.DestinationPartition != "default" {
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return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Cannot specify a destination partition with this endpoint"}
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}
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if args.Intention.SourcePartition != "" && args.Intention.SourcePartition != "default" {
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return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Cannot specify a source partition with this endpoint"}
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}
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args.Intention.FillPartitionAndNamespace(&entMeta, false)
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if err := s.validateEnterpriseIntention(args.Intention); err != nil {
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return nil, err
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}
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var reply string
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if err := s.agent.RPC(req.Context(), "Intention.Apply", &args, &reply); err != nil {
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return nil, err
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}
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return intentionCreateResponse{reply}, nil
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}
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func (s *HTTPHandlers) validateEnterpriseIntention(ixn *structs.Intention) error {
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if err := s.validateEnterpriseIntentionPartition("SourcePartition", ixn.SourcePartition); err != nil {
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return err
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}
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if err := s.validateEnterpriseIntentionPartition("DestinationPartition", ixn.DestinationPartition); err != nil {
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return err
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}
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if err := s.validateEnterpriseIntentionNamespace("SourceNS", ixn.SourceNS, true); err != nil {
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return err
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}
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if err := s.validateEnterpriseIntentionNamespace("DestinationNS", ixn.DestinationNS, true); err != nil {
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return err
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}
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return nil
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}
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// GET /v1/connect/intentions/match
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func (s *HTTPHandlers) IntentionMatch(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Prepare args
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args := &structs.IntentionQueryRequest{Match: &structs.IntentionQueryMatch{}}
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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var entMeta acl.EnterpriseMeta
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if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
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return nil, err
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}
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q := req.URL.Query()
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// Extract the "by" query parameter
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if by, ok := q["by"]; !ok || len(by) != 1 {
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return nil, fmt.Errorf("required query parameter 'by' not set")
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} else {
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switch v := structs.IntentionMatchType(by[0]); v {
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case structs.IntentionMatchSource, structs.IntentionMatchDestination:
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args.Match.Type = v
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default:
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return nil, fmt.Errorf("'by' parameter must be one of 'source' or 'destination'")
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}
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}
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// Extract all the match names
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names, ok := q["name"]
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if !ok || len(names) == 0 {
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return nil, fmt.Errorf("required query parameter 'name' not set")
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}
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// Build the entries in order. The order matters since that is the
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// order of the returned responses.
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args.Match.Entries = make([]structs.IntentionMatchEntry, len(names))
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for i, n := range names {
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parsed, err := parseIntentionStringComponent(n, &entMeta, false)
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if err != nil {
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return nil, fmt.Errorf("name %q is invalid: %s", n, err)
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}
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args.Match.Entries[i] = structs.IntentionMatchEntry{
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Partition: parsed.ap,
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Namespace: parsed.ns,
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Name: parsed.name,
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}
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}
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// Make the RPC request
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var out structs.IndexedIntentionMatches
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defer setMeta(resp, &out.QueryMeta)
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if s.agent.config.HTTPUseCache && args.QueryOptions.UseCache {
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raw, m, err := s.agent.cache.Get(req.Context(), cachetype.IntentionMatchName, args)
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if err != nil {
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return nil, err
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}
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defer setCacheMeta(resp, &m)
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reply, ok := raw.(*structs.IndexedIntentionMatches)
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if !ok {
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// This should never happen, but we want to protect against panics
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return nil, fmt.Errorf("internal error: response type not correct")
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}
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out = *reply
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} else {
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RETRY_ONCE:
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if err := s.agent.RPC(req.Context(), "Intention.Match", args, &out); err != nil {
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return nil, err
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}
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if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact {
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args.AllowStale = false
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args.MaxStaleDuration = 0
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goto RETRY_ONCE
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}
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}
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out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel()
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// We must have an identical count of matches
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if len(out.Matches) != len(names) {
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return nil, fmt.Errorf("internal error: match response count didn't match input count")
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}
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// Use empty list instead of nil.
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response := make(map[string]structs.Intentions)
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for i, ixns := range out.Matches {
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response[names[i]] = ixns
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}
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return response, nil
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}
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// GET /v1/connect/intentions/check
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func (s *HTTPHandlers) IntentionCheck(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Prepare args
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args := &structs.IntentionQueryRequest{Check: &structs.IntentionQueryCheck{}}
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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var entMeta acl.EnterpriseMeta
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if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
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return nil, err
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}
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q := req.URL.Query()
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// Set the source type if set
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args.Check.SourceType = structs.IntentionSourceConsul
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if sourceType, ok := q["source-type"]; ok && len(sourceType) > 0 {
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args.Check.SourceType = structs.IntentionSourceType(sourceType[0])
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}
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// Extract the source/destination
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source, ok := q["source"]
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if !ok || len(source) != 1 {
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return nil, fmt.Errorf("required query parameter 'source' not set")
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}
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destination, ok := q["destination"]
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if !ok || len(destination) != 1 {
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return nil, fmt.Errorf("required query parameter 'destination' not set")
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}
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// We parse them the same way as matches to extract partition/namespace/name
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args.Check.SourceName = source[0]
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if args.Check.SourceType == structs.IntentionSourceConsul {
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parsed, err := parseIntentionStringComponent(source[0], &entMeta, false)
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if err != nil {
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return nil, fmt.Errorf("source %q is invalid: %s", source[0], err)
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}
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args.Check.SourcePartition = parsed.ap
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args.Check.SourceNS = parsed.ns
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args.Check.SourceName = parsed.name
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}
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// The destination is always in the Consul format
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parsed, err := parseIntentionStringComponent(destination[0], &entMeta, false)
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if err != nil {
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return nil, fmt.Errorf("destination %q is invalid: %s", destination[0], err)
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}
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args.Check.DestinationPartition = parsed.ap
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args.Check.DestinationNS = parsed.ns
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args.Check.DestinationName = parsed.name
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var reply structs.IntentionQueryCheckResponse
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if err := s.agent.RPC(req.Context(), "Intention.Check", args, &reply); err != nil {
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return nil, err
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}
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return &reply, nil
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}
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// IntentionExact handles the endpoint for /v1/connect/intentions/exact
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func (s *HTTPHandlers) IntentionExact(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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switch req.Method {
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case "GET":
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return s.IntentionGetExact(resp, req)
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case "PUT":
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return s.IntentionPutExact(resp, req)
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case "DELETE":
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return s.IntentionDeleteExact(resp, req)
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default:
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return nil, MethodNotAllowedError{req.Method, []string{"GET", "PUT", "DELETE"}}
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}
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}
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// GET /v1/connect/intentions/exact
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func (s *HTTPHandlers) IntentionGetExact(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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var entMeta acl.EnterpriseMeta
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if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
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return nil, err
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}
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args := structs.IntentionQueryRequest{
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Exact: &structs.IntentionQueryExact{},
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}
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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q := req.URL.Query()
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// Extract the source/destination
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source, ok := q["source"]
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if !ok || len(source) != 1 {
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return nil, fmt.Errorf("required query parameter 'source' not set")
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}
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destination, ok := q["destination"]
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if !ok || len(destination) != 1 {
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return nil, fmt.Errorf("required query parameter 'destination' not set")
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}
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{
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parsed, err := parseIntentionStringComponent(source[0], &entMeta, true)
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if err != nil {
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return nil, fmt.Errorf("source %q is invalid: %s", source[0], err)
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}
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args.Exact.SourcePeer = parsed.peer
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args.Exact.SourcePartition = parsed.ap
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args.Exact.SourceNS = parsed.ns
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args.Exact.SourceName = parsed.name
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}
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{
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parsed, err := parseIntentionStringComponent(destination[0], &entMeta, false)
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if err != nil {
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return nil, fmt.Errorf("destination %q is invalid: %s", destination[0], err)
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}
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args.Exact.DestinationPartition = parsed.ap
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args.Exact.DestinationNS = parsed.ns
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args.Exact.DestinationName = parsed.name
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}
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var reply structs.IndexedIntentions
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if err := s.agent.RPC(req.Context(), "Intention.Get", &args, &reply); err != nil {
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// We have to check the string since the RPC sheds the error type
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if strings.Contains(err.Error(), consul.ErrIntentionNotFound.Error()) {
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return nil, HTTPError{StatusCode: http.StatusNotFound, Reason: err.Error()}
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}
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// Not ideal, but there are a number of error scenarios that are not
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// user error (400). We look for a specific case of invalid UUID
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// to detect a parameter error and return a 400 response. The error
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// is not a constant type or message, so we have to use strings.Contains
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if strings.Contains(err.Error(), "UUID") {
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return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: err.Error()}
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}
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return nil, err
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}
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// This shouldn't happen since the called API documents it shouldn't,
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// but we check since the alternative if it happens is a panic.
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if len(reply.Intentions) == 0 {
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resp.WriteHeader(http.StatusNotFound)
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return nil, nil
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}
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return reply.Intentions[0], nil
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}
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// PUT /v1/connect/intentions/exact
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func (s *HTTPHandlers) IntentionPutExact(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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var entMeta acl.EnterpriseMeta
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if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
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return nil, err
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}
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exact, err := parseIntentionQueryExact(req, &entMeta)
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if err != nil {
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return nil, err
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}
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args := structs.IntentionRequest{
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Op: structs.IntentionOpUpsert,
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}
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s.parseDC(req, &args.Datacenter)
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s.parseToken(req, &args.Token)
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if err := decodeBody(req.Body, &args.Intention); err != nil {
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return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: fmt.Sprintf("Request decode failed: %v", err)}
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}
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// Explicitly CLEAR the old legacy ID field
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args.Intention.ID = ""
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// Use the intention identity from the URL.
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args.Intention.SourcePartition = exact.SourcePartition
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args.Intention.SourceNS = exact.SourceNS
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args.Intention.SourceName = exact.SourceName
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args.Intention.DestinationPartition = exact.DestinationPartition
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args.Intention.DestinationNS = exact.DestinationNS
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args.Intention.DestinationName = exact.DestinationName
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args.Intention.FillPartitionAndNamespace(&entMeta, false)
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var ignored string
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if err := s.agent.RPC(req.Context(), "Intention.Apply", &args, &ignored); err != nil {
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return nil, err
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}
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return true, nil
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}
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// DELETE /v1/connect/intentions/exact
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func (s *HTTPHandlers) IntentionDeleteExact(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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var entMeta acl.EnterpriseMeta
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if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
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return nil, err
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}
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exact, err := parseIntentionQueryExact(req, &entMeta)
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if err != nil {
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return nil, err
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}
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args := structs.IntentionRequest{
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Op: structs.IntentionOpDelete,
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Intention: &structs.Intention{
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// NOTE: ID is explicitly empty here
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SourcePartition: exact.SourcePartition,
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SourceNS: exact.SourceNS,
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SourceName: exact.SourceName,
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DestinationPartition: exact.DestinationPartition,
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DestinationNS: exact.DestinationNS,
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DestinationName: exact.DestinationName,
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},
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}
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s.parseDC(req, &args.Datacenter)
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s.parseToken(req, &args.Token)
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var ignored string
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if err := s.agent.RPC(req.Context(), "Intention.Apply", &args, &ignored); err != nil {
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return nil, err
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}
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return true, nil
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}
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// intentionCreateResponse is the response structure for creating an intention.
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type intentionCreateResponse struct{ ID string }
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func parseIntentionQueryExact(req *http.Request, entMeta *acl.EnterpriseMeta) (*structs.IntentionQueryExact, error) {
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q := req.URL.Query()
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// Extract the source/destination
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source, ok := q["source"]
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if !ok || len(source) != 1 || source[0] == "" {
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return nil, fmt.Errorf("required query parameter 'source' not set")
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}
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destination, ok := q["destination"]
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if !ok || len(destination) != 1 || destination[0] == "" {
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return nil, fmt.Errorf("required query parameter 'destination' not set")
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}
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var exact structs.IntentionQueryExact
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{
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parsed, err := parseIntentionStringComponent(source[0], entMeta, false)
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if err != nil {
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return nil, fmt.Errorf("source %q is invalid: %s", source[0], err)
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}
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exact.SourcePartition = parsed.ap
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exact.SourceNS = parsed.ns
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exact.SourceName = parsed.name
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}
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{
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parsed, err := parseIntentionStringComponent(destination[0], entMeta, false)
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if err != nil {
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return nil, fmt.Errorf("destination %q is invalid: %s", destination[0], err)
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}
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exact.DestinationPartition = parsed.ap
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exact.DestinationNS = parsed.ns
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exact.DestinationName = parsed.name
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}
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return &exact, nil
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}
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type parsedIntentionInput struct {
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peer, ap, ns, name string
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}
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func parseIntentionStringComponent(input string, entMeta *acl.EnterpriseMeta, allowPeerKeyword bool) (*parsedIntentionInput, error) {
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if strings.HasPrefix(input, "peer:") && !allowPeerKeyword {
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return nil, fmt.Errorf("cannot specify a peer here")
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}
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ss := strings.Split(input, "/")
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switch len(ss) {
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case 1: // Name only
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// need to specify at least the service name too
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if strings.HasPrefix(ss[0], "peer:") {
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return nil, fmt.Errorf("need to specify the service name as well")
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}
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ns := entMeta.NamespaceOrEmpty()
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ap := entMeta.PartitionOrEmpty()
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return &parsedIntentionInput{ap: ap, ns: ns, name: ss[0]}, nil
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case 2: // peer:peer/name OR namespace/name
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if strings.HasPrefix(ss[0], "peer:") {
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peerName := strings.TrimPrefix(ss[0], "peer:")
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ns := entMeta.NamespaceOrEmpty()
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return &parsedIntentionInput{peer: peerName, ns: ns, name: ss[1]}, nil
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}
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ap := entMeta.PartitionOrEmpty()
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|
return &parsedIntentionInput{ap: ap, ns: ss[0], name: ss[1]}, nil
|
|
case 3: // peer:peer/namespace/name OR partition/namespace/name
|
|
if strings.HasPrefix(ss[0], "peer:") {
|
|
peerName := strings.TrimPrefix(ss[0], "peer:")
|
|
return &parsedIntentionInput{peer: peerName, ns: ss[1], name: ss[2]}, nil
|
|
} else {
|
|
return &parsedIntentionInput{ap: ss[0], ns: ss[1], name: ss[2]}, nil
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("input can contain at most two '/'")
|
|
}
|
|
}
|
|
|
|
// IntentionSpecific handles the endpoint for /v1/connect/intentions/:id.
|
|
// Deprecated: use IntentionExact.
|
|
func (s *HTTPHandlers) IntentionSpecific(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
id := strings.TrimPrefix(req.URL.Path, "/v1/connect/intentions/")
|
|
|
|
switch req.Method {
|
|
case "GET":
|
|
return s.IntentionSpecificGet(id, resp, req)
|
|
|
|
case "PUT":
|
|
return s.IntentionSpecificUpdate(id, resp, req)
|
|
|
|
case "DELETE":
|
|
return s.IntentionSpecificDelete(id, resp, req)
|
|
|
|
default:
|
|
return nil, MethodNotAllowedError{req.Method, []string{"GET", "PUT", "DELETE"}}
|
|
}
|
|
}
|
|
|
|
// Deprecated: use IntentionGetExact.
|
|
func (s *HTTPHandlers) IntentionSpecificGet(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
// Method is tested in IntentionEndpoint
|
|
|
|
args := structs.IntentionQueryRequest{
|
|
IntentionID: id,
|
|
}
|
|
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
|
|
return nil, nil
|
|
}
|
|
|
|
var reply structs.IndexedIntentions
|
|
if err := s.agent.RPC(req.Context(), "Intention.Get", &args, &reply); err != nil {
|
|
// We have to check the string since the RPC sheds the error type
|
|
if err.Error() == consul.ErrIntentionNotFound.Error() {
|
|
return nil, HTTPError{StatusCode: http.StatusNotFound, Reason: err.Error()}
|
|
}
|
|
|
|
// Not ideal, but there are a number of error scenarios that are not
|
|
// user error (400). We look for a specific case of invalid UUID
|
|
// to detect a parameter error and return a 400 response. The error
|
|
// is not a constant type or message, so we have to use strings.Contains
|
|
if strings.Contains(err.Error(), "UUID") {
|
|
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: err.Error()}
|
|
}
|
|
|
|
return nil, err
|
|
}
|
|
|
|
// This shouldn't happen since the called API documents it shouldn't,
|
|
// but we check since the alternative if it happens is a panic.
|
|
if len(reply.Intentions) == 0 {
|
|
resp.WriteHeader(http.StatusNotFound)
|
|
return nil, nil
|
|
}
|
|
|
|
return reply.Intentions[0], nil
|
|
}
|
|
|
|
// Deprecated: use IntentionPutExact.
|
|
func (s *HTTPHandlers) IntentionSpecificUpdate(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
// Method is tested in IntentionEndpoint
|
|
|
|
var entMeta acl.EnterpriseMeta
|
|
if err := s.parseEntMetaNoWildcard(req, &entMeta); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if entMeta.PartitionOrDefault() != acl.PartitionOrDefault("") {
|
|
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Cannot use a partition with this endpoint"}
|
|
}
|
|
|
|
args := structs.IntentionRequest{
|
|
Op: structs.IntentionOpUpdate,
|
|
}
|
|
s.parseDC(req, &args.Datacenter)
|
|
s.parseToken(req, &args.Token)
|
|
if err := decodeBody(req.Body, &args.Intention); err != nil {
|
|
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: fmt.Sprintf("Request decode failed: %v", err)}
|
|
}
|
|
|
|
if args.Intention.DestinationPartition != "" && args.Intention.DestinationPartition != "default" {
|
|
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Cannot specify a destination partition with this endpoint"}
|
|
}
|
|
if args.Intention.SourcePartition != "" && args.Intention.SourcePartition != "default" {
|
|
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Cannot specify a source partition with this endpoint"}
|
|
}
|
|
|
|
args.Intention.FillPartitionAndNamespace(&entMeta, false)
|
|
|
|
// Use the ID from the URL
|
|
args.Intention.ID = id
|
|
|
|
var reply string
|
|
if err := s.agent.RPC(req.Context(), "Intention.Apply", &args, &reply); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Update uses the same create response
|
|
return intentionCreateResponse{reply}, nil
|
|
}
|
|
|
|
// Deprecated: use IntentionDeleteExact.
|
|
func (s *HTTPHandlers) IntentionSpecificDelete(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
// Method is tested in IntentionEndpoint
|
|
|
|
args := structs.IntentionRequest{
|
|
Op: structs.IntentionOpDelete,
|
|
Intention: &structs.Intention{ID: id},
|
|
}
|
|
s.parseDC(req, &args.Datacenter)
|
|
s.parseToken(req, &args.Token)
|
|
|
|
var reply string
|
|
if err := s.agent.RPC(req.Context(), "Intention.Apply", &args, &reply); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return true, nil
|
|
}
|