lib/controller/router/router.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: AGPL-3.0
   4
   5 package router
   6
   7 import (
   8         "context"
   9         "fmt"
  10         "net/http"
  11         "strings"
  12
  13         "git.curoverse.com/arvados.git/sdk/go/arvados"
  14         "git.curoverse.com/arvados.git/sdk/go/auth"
  15         "git.curoverse.com/arvados.git/sdk/go/ctxlog"
  16         "git.curoverse.com/arvados.git/sdk/go/httpserver"
  17         "github.com/julienschmidt/httprouter"
  18         "github.com/sirupsen/logrus"
  19 )
  20
  21 type router struct {
  22         mux *httprouter.Router
  23         fed arvados.API
  24 }
  25
  26 func New(fed arvados.API) *router {
  27         rtr := &router{
  28                 mux: httprouter.New(),
  29                 fed: fed,
  30         }
  31         rtr.addRoutes()
  32         return rtr
  33 }
  34
  35 type routableFunc func(ctx context.Context, opts interface{}) (interface{}, error)
  36
  37 func (rtr *router) addRoutes() {
  38         for _, route := range []struct {
  39                 endpoint    arvados.APIEndpoint
  40                 defaultOpts func() interface{}
  41                 exec        routableFunc
  42         }{
  43                 {
  44                         arvados.EndpointConfigGet,
  45                         func() interface{} { return &struct{}{} },
  46                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  47                                 return rtr.fed.ConfigGet(ctx)
  48                         },
  49                 },
  50                 {
  51                         arvados.EndpointLogin,
  52                         func() interface{} { return &arvados.LoginOptions{} },
  53                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  54                                 return rtr.fed.Login(ctx, *opts.(*arvados.LoginOptions))
  55                         },
  56                 },
  57                 {
  58                         arvados.EndpointCollectionCreate,
  59                         func() interface{} { return &arvados.CreateOptions{} },
  60                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  61                                 return rtr.fed.CollectionCreate(ctx, *opts.(*arvados.CreateOptions))
  62                         },
  63                 },
  64                 {
  65                         arvados.EndpointCollectionUpdate,
  66                         func() interface{} { return &arvados.UpdateOptions{} },
  67                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  68                                 return rtr.fed.CollectionUpdate(ctx, *opts.(*arvados.UpdateOptions))
  69                         },
  70                 },
  71                 {
  72                         arvados.EndpointCollectionGet,
  73                         func() interface{} { return &arvados.GetOptions{} },
  74                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  75                                 return rtr.fed.CollectionGet(ctx, *opts.(*arvados.GetOptions))
  76                         },
  77                 },
  78                 {
  79                         arvados.EndpointCollectionList,
  80                         func() interface{} { return &arvados.ListOptions{Limit: -1} },
  81                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  82                                 return rtr.fed.CollectionList(ctx, *opts.(*arvados.ListOptions))
  83                         },
  84                 },
  85                 {
  86                         arvados.EndpointCollectionProvenance,
  87                         func() interface{} { return &arvados.GetOptions{} },
  88                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  89                                 return rtr.fed.CollectionProvenance(ctx, *opts.(*arvados.GetOptions))
  90                         },
  91                 },
  92                 {
  93                         arvados.EndpointCollectionUsedBy,
  94                         func() interface{} { return &arvados.GetOptions{} },
  95                         func(ctx context.Context, opts interface{}) (interface{}, error) {
  96                                 return rtr.fed.CollectionUsedBy(ctx, *opts.(*arvados.GetOptions))
  97                         },
  98                 },
  99                 {
 100                         arvados.EndpointCollectionDelete,
 101                         func() interface{} { return &arvados.DeleteOptions{} },
 102                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 103                                 return rtr.fed.CollectionDelete(ctx, *opts.(*arvados.DeleteOptions))
 104                         },
 105                 },
 106                 {
 107                         arvados.EndpointCollectionTrash,
 108                         func() interface{} { return &arvados.DeleteOptions{} },
 109                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 110                                 return rtr.fed.CollectionTrash(ctx, *opts.(*arvados.DeleteOptions))
 111                         },
 112                 },
 113                 {
 114                         arvados.EndpointCollectionUntrash,
 115                         func() interface{} { return &arvados.UntrashOptions{} },
 116                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 117                                 return rtr.fed.CollectionUntrash(ctx, *opts.(*arvados.UntrashOptions))
 118                         },
 119                 },
 120                 {
 121                         arvados.EndpointContainerCreate,
 122                         func() interface{} { return &arvados.CreateOptions{} },
 123                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 124                                 return rtr.fed.ContainerCreate(ctx, *opts.(*arvados.CreateOptions))
 125                         },
 126                 },
 127                 {
 128                         arvados.EndpointContainerUpdate,
 129                         func() interface{} { return &arvados.UpdateOptions{} },
 130                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 131                                 return rtr.fed.ContainerUpdate(ctx, *opts.(*arvados.UpdateOptions))
 132                         },
 133                 },
 134                 {
 135                         arvados.EndpointContainerGet,
 136                         func() interface{} { return &arvados.GetOptions{} },
 137                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 138                                 return rtr.fed.ContainerGet(ctx, *opts.(*arvados.GetOptions))
 139                         },
 140                 },
 141                 {
 142                         arvados.EndpointContainerList,
 143                         func() interface{} { return &arvados.ListOptions{Limit: -1} },
 144                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 145                                 return rtr.fed.ContainerList(ctx, *opts.(*arvados.ListOptions))
 146                         },
 147                 },
 148                 {
 149                         arvados.EndpointContainerDelete,
 150                         func() interface{} { return &arvados.DeleteOptions{} },
 151                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 152                                 return rtr.fed.ContainerDelete(ctx, *opts.(*arvados.DeleteOptions))
 153                         },
 154                 },
 155                 {
 156                         arvados.EndpointContainerLock,
 157                         func() interface{} {
 158                                 return &arvados.GetOptions{Select: []string{"uuid", "state", "priority", "auth_uuid", "locked_by_uuid"}}
 159                         },
 160                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 161                                 return rtr.fed.ContainerLock(ctx, *opts.(*arvados.GetOptions))
 162                         },
 163                 },
 164                 {
 165                         arvados.EndpointContainerUnlock,
 166                         func() interface{} {
 167                                 return &arvados.GetOptions{Select: []string{"uuid", "state", "priority", "auth_uuid", "locked_by_uuid"}}
 168                         },
 169                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 170                                 return rtr.fed.ContainerUnlock(ctx, *opts.(*arvados.GetOptions))
 171                         },
 172                 },
 173                 {
 174                         arvados.EndpointSpecimenCreate,
 175                         func() interface{} { return &arvados.CreateOptions{} },
 176                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 177                                 return rtr.fed.SpecimenCreate(ctx, *opts.(*arvados.CreateOptions))
 178                         },
 179                 },
 180                 {
 181                         arvados.EndpointSpecimenUpdate,
 182                         func() interface{} { return &arvados.UpdateOptions{} },
 183                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 184                                 return rtr.fed.SpecimenUpdate(ctx, *opts.(*arvados.UpdateOptions))
 185                         },
 186                 },
 187                 {
 188                         arvados.EndpointSpecimenGet,
 189                         func() interface{} { return &arvados.GetOptions{} },
 190                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 191                                 return rtr.fed.SpecimenGet(ctx, *opts.(*arvados.GetOptions))
 192                         },
 193                 },
 194                 {
 195                         arvados.EndpointSpecimenList,
 196                         func() interface{} { return &arvados.ListOptions{Limit: -1} },
 197                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 198                                 return rtr.fed.SpecimenList(ctx, *opts.(*arvados.ListOptions))
 199                         },
 200                 },
 201                 {
 202                         arvados.EndpointSpecimenDelete,
 203                         func() interface{} { return &arvados.DeleteOptions{} },
 204                         func(ctx context.Context, opts interface{}) (interface{}, error) {
 205                                 return rtr.fed.SpecimenDelete(ctx, *opts.(*arvados.DeleteOptions))
 206                         },
 207                 },
 208         } {
 209                 rtr.addRoute(route.endpoint, route.defaultOpts, route.exec)
 210                 if route.endpoint.Method == "PATCH" {
 211                         // Accept PUT as a synonym for PATCH.
 212                         endpointPUT := route.endpoint
 213                         endpointPUT.Method = "PUT"
 214                         rtr.addRoute(endpointPUT, route.defaultOpts, route.exec)
 215                 }
 216         }
 217         rtr.mux.NotFound = http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 218                 httpserver.Errors(w, []string{"API endpoint not found"}, http.StatusNotFound)
 219         })
 220         rtr.mux.MethodNotAllowed = http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 221                 httpserver.Errors(w, []string{"API endpoint not found"}, http.StatusMethodNotAllowed)
 222         })
 223 }
 224
 225 func (rtr *router) addRoute(endpoint arvados.APIEndpoint, defaultOpts func() interface{}, exec routableFunc) {
 226         rtr.mux.HandlerFunc(endpoint.Method, "/"+endpoint.Path, func(w http.ResponseWriter, req *http.Request) {
 227                 logger := ctxlog.FromContext(req.Context())
 228                 params, err := rtr.loadRequestParams(req, endpoint.AttrsKey)
 229                 if err != nil {
 230                         logger.WithFields(logrus.Fields{
 231                                 "req":      req,
 232                                 "method":   endpoint.Method,
 233                                 "endpoint": endpoint,
 234                         }).WithError(err).Debug("error loading request params")
 235                         rtr.sendError(w, err)
 236                         return
 237                 }
 238                 opts := defaultOpts()
 239                 err = rtr.transcode(params, opts)
 240                 if err != nil {
 241                         logger.WithField("params", params).WithError(err).Debugf("error transcoding params to %T", opts)
 242                         rtr.sendError(w, err)
 243                         return
 244                 }
 245                 respOpts, err := rtr.responseOptions(opts)
 246                 if err != nil {
 247                         logger.WithField("opts", opts).WithError(err).Debugf("error getting response options from %T", opts)
 248                         rtr.sendError(w, err)
 249                         return
 250                 }
 251
 252                 creds := auth.CredentialsFromRequest(req)
 253                 if rt, _ := params["reader_tokens"].([]interface{}); len(rt) > 0 {
 254                         for _, t := range rt {
 255                                 if t, ok := t.(string); ok {
 256                                         creds.Tokens = append(creds.Tokens, t)
 257                                 }
 258                         }
 259                 }
 260                 ctx := auth.NewContext(req.Context(), creds)
 261                 ctx = arvados.ContextWithRequestID(ctx, req.Header.Get("X-Request-Id"))
 262                 logger.WithFields(logrus.Fields{
 263                         "apiEndpoint": endpoint,
 264                         "apiOptsType": fmt.Sprintf("%T", opts),
 265                         "apiOpts":     opts,
 266                 }).Debug("exec")
 267                 resp, err := exec(ctx, opts)
 268                 if err != nil {
 269                         logger.WithError(err).Debugf("returning error type %T", err)
 270                         rtr.sendError(w, err)
 271                         return
 272                 }
 273                 rtr.sendResponse(w, req, resp, respOpts)
 274         })
 275 }
 276
 277 func (rtr *router) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 278         switch strings.SplitN(strings.TrimLeft(r.URL.Path, "/"), "/", 2)[0] {
 279         case "login", "logout", "auth":
 280         default:
 281                 w.Header().Set("Access-Control-Allow-Origin", "*")
 282                 w.Header().Set("Access-Control-Allow-Methods", "GET, HEAD, PUT, POST, DELETE")
 283                 w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type")
 284                 w.Header().Set("Access-Control-Max-Age", "86486400")
 285         }
 286         if r.Method == "OPTIONS" {
 287                 return
 288         }
 289         r.ParseForm()
 290         if m := r.FormValue("_method"); m != "" {
 291                 r2 := *r
 292                 r = &r2
 293                 r.Method = m
 294         }
 295         rtr.mux.ServeHTTP(w, r)
 296 }