251 lines
6.9 KiB
Go
251 lines
6.9 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/agent/consul"
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"github.com/hashicorp/consul/agent/structs"
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)
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// /v1/connection/intentions
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func (s *HTTPServer) 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 *HTTPServer) 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.DCSpecificRequest
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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 reply structs.IndexedIntentions
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if err := s.agent.RPC("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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// POST /v1/connect/intentions
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func (s *HTTPServer) IntentionCreate(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Method is tested in IntentionEndpoint
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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, &args.Intention, nil); err != nil {
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resp.WriteHeader(http.StatusBadRequest)
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fmt.Fprintf(resp, "Request decode failed: %v", err)
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return nil, nil
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}
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var reply string
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if err := s.agent.RPC("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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// GET /v1/connect/intentions/match
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func (s *HTTPServer) 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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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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entry, err := parseIntentionMatchEntry(n)
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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] = entry
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}
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var reply structs.IndexedIntentionMatches
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if err := s.agent.RPC("Intention.Match", args, &reply); err != nil {
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return nil, err
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}
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// We must have an identical count of matches
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if len(reply.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 reply.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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// IntentionSpecific handles the endpoint for /v1/connection/intentions/:id
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func (s *HTTPServer) IntentionSpecific(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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id := strings.TrimPrefix(req.URL.Path, "/v1/connect/intentions/")
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switch req.Method {
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case "GET":
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return s.IntentionSpecificGet(id, resp, req)
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case "PUT":
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return s.IntentionSpecificUpdate(id, resp, req)
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case "DELETE":
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return s.IntentionSpecificDelete(id, 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/:id
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func (s *HTTPServer) IntentionSpecificGet(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Method is tested in IntentionEndpoint
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args := structs.IntentionQueryRequest{
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IntentionID: id,
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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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var reply structs.IndexedIntentions
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if err := s.agent.RPC("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 err.Error() == consul.ErrIntentionNotFound.Error() {
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resp.WriteHeader(http.StatusNotFound)
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fmt.Fprint(resp, err.Error())
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return nil, nil
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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/:id
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func (s *HTTPServer) IntentionSpecificUpdate(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Method is tested in IntentionEndpoint
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args := structs.IntentionRequest{
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Op: structs.IntentionOpUpdate,
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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, &args.Intention, nil); err != nil {
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resp.WriteHeader(http.StatusBadRequest)
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fmt.Fprintf(resp, "Request decode failed: %v", err)
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return nil, nil
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}
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// Use the ID from the URL
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args.Intention.ID = id
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var reply string
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if err := s.agent.RPC("Intention.Apply", &args, &reply); err != nil {
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return nil, err
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}
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return nil, nil
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}
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// DELETE /v1/connect/intentions/:id
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func (s *HTTPServer) IntentionSpecificDelete(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Method is tested in IntentionEndpoint
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args := structs.IntentionRequest{
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Op: structs.IntentionOpDelete,
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Intention: &structs.Intention{ID: id},
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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 reply string
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if err := s.agent.RPC("Intention.Apply", &args, &reply); err != nil {
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return nil, err
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}
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return nil, 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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// parseIntentionMatchEntry parses the query parameter for an intention
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// match query entry.
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func parseIntentionMatchEntry(input string) (structs.IntentionMatchEntry, error) {
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var result structs.IntentionMatchEntry
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result.Namespace = structs.IntentionDefaultNamespace
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// TODO(mitchellh): when namespaces are introduced, set the default
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// namespace to be the namespace of the requestor.
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// Get the index to the '/'. If it doesn't exist, we have just a name
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// so just set that and return.
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idx := strings.IndexByte(input, '/')
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if idx == -1 {
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result.Name = input
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return result, nil
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}
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result.Namespace = input[:idx]
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result.Name = input[idx+1:]
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if strings.IndexByte(result.Name, '/') != -1 {
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return result, fmt.Errorf("input can contain at most one '/'")
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}
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return result, nil
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}
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