open-consul/agent/hcp/testing.go

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package hcp
import (
"encoding/json"
"fmt"
"log"
"net/http"
"regexp"
"strings"
"sync"
"time"
gnmmod "github.com/hashicorp/hcp-sdk-go/clients/cloud-global-network-manager-service/preview/2022-02-15/models"
"github.com/hashicorp/hcp-sdk-go/resource"
)
type TestEndpoint struct {
Methods []string
PathSuffix string
Handler func(r *http.Request, cluster resource.Resource) (interface{}, error)
}
type MockHCPServer struct {
mu sync.Mutex
handlers map[string]TestEndpoint
servers map[string]*gnmmod.HashicorpCloudGlobalNetworkManager20220215Server
}
var basePathRe = regexp.MustCompile("/global-network-manager/[^/]+/organizations/([^/]+)/projects/([^/]+)/clusters/([^/]+)/([^/]+.*)")
func NewMockHCPServer() *MockHCPServer {
s := &MockHCPServer{
handlers: make(map[string]TestEndpoint),
servers: make(map[string]*gnmmod.HashicorpCloudGlobalNetworkManager20220215Server),
}
// Define endpoints in this package
s.AddEndpoint(TestEndpoint{
Methods: []string{"POST"},
PathSuffix: "agent/server-state",
Handler: s.handleStatus,
})
s.AddEndpoint(TestEndpoint{
Methods: []string{"POST"},
PathSuffix: "agent/discover",
Handler: s.handleDiscover,
})
return s
}
// AddEndpoint allows adding additional endpoints from other packages e.g.
// bootstrap (which can't be merged into one package due to dependency cycles).
// It's not safe to call this concurrently with any other call to AddEndpoint or
// ServeHTTP.
func (s *MockHCPServer) AddEndpoint(e TestEndpoint) {
s.handlers[e.PathSuffix] = e
}
func (s *MockHCPServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.mu.Lock()
defer s.mu.Unlock()
if r.URL.Path == "/oauth/token" {
mockTokenResponse(w)
return
}
matches := basePathRe.FindStringSubmatch(r.URL.Path)
if matches == nil || len(matches) < 5 {
w.WriteHeader(404)
log.Printf("ERROR 404: %s %s\n", r.Method, r.URL.Path)
return
}
cluster := resource.Resource{
ID: matches[3],
Type: "cluster",
Organization: matches[1],
Project: matches[2],
}
found := false
var resp interface{}
var err error
for _, e := range s.handlers {
if e.PathSuffix == matches[4] {
found = true
if !enforceMethod(w, r, e.Methods) {
return
}
resp, err = e.Handler(r, cluster)
break
}
}
if !found {
w.WriteHeader(404)
log.Printf("ERROR 404: %s %s\n", r.Method, r.URL.Path)
return
}
if err != nil {
errResponse(w, err)
return
}
if resp == nil {
// no response body
log.Printf("OK 204: %s %s\n", r.Method, r.URL.Path)
w.WriteHeader(http.StatusNoContent)
return
}
bs, err := json.MarshalIndent(resp, "", " ")
if err != nil {
errResponse(w, err)
return
}
log.Printf("OK 200: %s %s\n", r.Method, r.URL.Path)
w.Header().Set("content-type", "application/json")
w.WriteHeader(http.StatusOK)
w.Write(bs)
}
func enforceMethod(w http.ResponseWriter, r *http.Request, methods []string) bool {
for _, m := range methods {
if strings.EqualFold(r.Method, m) {
return true
}
}
// No match, sent 4xx
w.WriteHeader(http.StatusMethodNotAllowed)
log.Printf("ERROR 405: bad method (not in %v): %s %s\n", methods, r.Method, r.URL.Path)
return false
}
func mockTokenResponse(w http.ResponseWriter) {
w.WriteHeader(http.StatusOK)
w.Write([]byte(`{access_token: "token", token_type: "Bearer"}`))
}
func (s *MockHCPServer) handleStatus(r *http.Request, cluster resource.Resource) (interface{}, error) {
var req gnmmod.HashicorpCloudGlobalNetworkManager20220215AgentPushServerStateRequest
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
return nil, err
}
status := req.ServerState
log.Printf("STATUS UPDATE: server=%s version=%s leader=%v hasLeader=%v healthy=%v tlsCertExpiryDays=%1.0f",
status.Name,
status.Version,
status.Raft.IsLeader,
status.Raft.KnownLeader,
status.Autopilot.Healthy,
time.Until(time.Time(status.TLS.CertExpiry)).Hours()/24,
)
s.servers[status.Name] = &gnmmod.HashicorpCloudGlobalNetworkManager20220215Server{
GossipPort: status.GossipPort,
ID: status.ID,
LanAddress: status.LanAddress,
Name: status.Name,
RPCPort: status.RPCPort,
}
return "{}", nil
}
func (s *MockHCPServer) handleDiscover(r *http.Request, cluster resource.Resource) (interface{}, error) {
servers := make([]*gnmmod.HashicorpCloudGlobalNetworkManager20220215Server, len(s.servers))
for _, server := range s.servers {
servers = append(servers, server)
}
return gnmmod.HashicorpCloudGlobalNetworkManager20220215AgentDiscoverResponse{Servers: servers}, nil
}
func errResponse(w http.ResponseWriter, err error) {
log.Printf("ERROR 500: %s\n", err)
w.WriteHeader(500)
w.Write([]byte(fmt.Sprintf(`{"error": %q}`, err.Error())))
}