ceph/src/rgw/rgw_rest_conn.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "rgw_rados.h"
   5 #include "rgw_rest_conn.h"
   6
   7 #define dout_subsys ceph_subsys_rgw
   8
   9 RGWRESTConn::RGWRESTConn(CephContext *_cct, RGWRados *store,
  10                          const string& _remote_id,
  11                          const list<string>& remote_endpoints)
  12   : cct(_cct),
  13     endpoints(remote_endpoints.begin(), remote_endpoints.end()),
  14     remote_id(_remote_id)
  15 {
  16   if (store) {
  17     key = store->get_zone_params().system_key;
  18     self_zone_group = store->get_zonegroup().get_id();
  19   }
  20 }
  21
  22 RGWRESTConn::RGWRESTConn(RGWRESTConn&& other)
  23   : cct(other.cct),
  24     endpoints(std::move(other.endpoints)),
  25     key(std::move(other.key)),
  26     self_zone_group(std::move(other.self_zone_group)),
  27     remote_id(std::move(other.remote_id)),
  28     counter(other.counter.load())
  29 {
  30 }
  31
  32 RGWRESTConn& RGWRESTConn::operator=(RGWRESTConn&& other)
  33 {
  34   cct = other.cct;
  35   endpoints = std::move(other.endpoints);
  36   key = std::move(other.key);
  37   self_zone_group = std::move(other.self_zone_group);
  38   remote_id = std::move(other.remote_id);
  39   counter = other.counter.load();
  40   return *this;
  41 }
  42
  43 int RGWRESTConn::get_url(string& endpoint)
  44 {
  45   if (endpoints.empty()) {
  46     ldout(cct, 0) << "ERROR: endpoints not configured for upstream zone" << dendl;
  47     return -EIO;
  48   }
  49
  50   int i = ++counter;
  51   endpoint = endpoints[i % endpoints.size()];
  52
  53   return 0;
  54 }
  55
  56 string RGWRESTConn::get_url()
  57 {
  58   string endpoint;
  59   if (endpoints.empty()) {
  60     ldout(cct, 0) << "WARNING: endpoints not configured for upstream zone" << dendl; /* we'll catch this later */
  61     return endpoint;
  62   }
  63
  64   int i = ++counter;
  65   endpoint = endpoints[i % endpoints.size()];
  66
  67   return endpoint;
  68 }
  69
  70 static void populate_params(param_vec_t& params, const rgw_user *uid, const string& zonegroup)
  71 {
  72   if (uid) {
  73     string uid_str = uid->to_str();
  74     if (!uid->empty()) {
  75       params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "uid", uid_str));
  76     }
  77   }
  78   if (!zonegroup.empty()) {
  79     params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "zonegroup", zonegroup));
  80   }
  81 }
  82
  83 int RGWRESTConn::forward(const rgw_user& uid, req_info& info, obj_version *objv, size_t max_response, bufferlist *inbl, bufferlist *outbl)
  84 {
  85   string url;
  86   int ret = get_url(url);
  87   if (ret < 0)
  88     return ret;
  89   param_vec_t params;
  90   populate_params(params, &uid, self_zone_group);
  91   if (objv) {
  92     params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "tag", objv->tag));
  93     char buf[16];
  94     snprintf(buf, sizeof(buf), "%lld", (long long)objv->ver);
  95     params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "ver", buf));
  96   }
  97   RGWRESTSimpleRequest req(cct, url, NULL, &params);
  98   return req.forward_request(key, info, max_response, inbl, outbl);
  99 }
 100
 101 class StreamObjData : public RGWGetDataCB {
 102   rgw_obj obj;
 103 public:
 104     explicit StreamObjData(rgw_obj& _obj) : obj(_obj) {}
 105 };
 106
 107 int RGWRESTConn::put_obj_init(const rgw_user& uid, rgw_obj& obj, uint64_t obj_size,
 108                                       map<string, bufferlist>& attrs, RGWRESTStreamWriteRequest **req)
 109 {
 110   string url;
 111   int ret = get_url(url);
 112   if (ret < 0)
 113     return ret;
 114
 115   param_vec_t params;
 116   populate_params(params, &uid, self_zone_group);
 117   *req = new RGWRESTStreamWriteRequest(cct, url, NULL, &params);
 118   return (*req)->put_obj_init(key, obj, obj_size, attrs);
 119 }
 120
 121 int RGWRESTConn::complete_request(RGWRESTStreamWriteRequest *req, string& etag, real_time *mtime)
 122 {
 123   int ret = req->complete(etag, mtime);
 124   delete req;
 125
 126   return ret;
 127 }
 128
 129 static void set_date_header(const real_time *t, map<string, string>& headers, const string& header_name)
 130 {
 131   if (!t) {
 132     return;
 133   }
 134   stringstream s;
 135   utime_t tm = utime_t(*t);
 136   tm.gmtime_nsec(s);
 137   headers[header_name] = s.str();
 138 }
 139
 140 template <class T>
 141 static void set_header(T val, map<string, string>& headers, const string& header_name)
 142 {
 143   stringstream s;
 144   s << val;
 145   headers[header_name] = s.str();
 146 }
 147
 148
 149 int RGWRESTConn::get_obj(const rgw_user& uid, req_info *info /* optional */, rgw_obj& obj,
 150                          const real_time *mod_ptr, const real_time *unmod_ptr,
 151                          uint32_t mod_zone_id, uint64_t mod_pg_ver,
 152                          bool prepend_metadata, bool get_op, bool rgwx_stat,
 153                          bool sync_manifest, RGWGetDataCB *cb,
 154                          RGWRESTStreamRWRequest **req)
 155 {
 156   string url;
 157   int ret = get_url(url);
 158   if (ret < 0)
 159     return ret;
 160
 161   param_vec_t params;
 162   populate_params(params, &uid, self_zone_group);
 163   if (prepend_metadata) {
 164     params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "prepend-metadata", self_zone_group));
 165   }
 166   if (rgwx_stat) {
 167     params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "stat", "true"));
 168   }
 169   if (sync_manifest) {
 170     params.push_back(param_pair_t(RGW_SYS_PARAM_PREFIX "sync-manifest", ""));
 171   }
 172   if (!obj.key.instance.empty()) {
 173     const string& instance = obj.key.instance;
 174     params.push_back(param_pair_t("versionId", instance));
 175   }
 176   if (get_op) {
 177     *req = new RGWRESTStreamReadRequest(cct, url, cb, NULL, &params);
 178   } else {
 179     *req = new RGWRESTStreamHeadRequest(cct, url, cb, NULL, &params);
 180   }
 181   map<string, string> extra_headers;
 182   if (info) {
 183     map<string, string, ltstr_nocase>& orig_map = info->env->get_map();
 184
 185     /* add original headers that start with HTTP_X_AMZ_ */
 186 #define SEARCH_AMZ_PREFIX "HTTP_X_AMZ_"
 187     for (map<string, string>::iterator iter = orig_map.lower_bound(SEARCH_AMZ_PREFIX); iter != orig_map.end(); ++iter) {
 188       const string& name = iter->first;
 189       if (name == "HTTP_X_AMZ_DATE") /* dont forward date from original request */
 190         continue;
 191       if (name.compare(0, sizeof(SEARCH_AMZ_PREFIX) - 1, "HTTP_X_AMZ_") != 0)
 192         break;
 193       extra_headers[iter->first] = iter->second;
 194     }
 195   }
 196
 197   set_date_header(mod_ptr, extra_headers, "HTTP_IF_MODIFIED_SINCE");
 198   set_date_header(unmod_ptr, extra_headers, "HTTP_IF_UNMODIFIED_SINCE");
 199   if (mod_zone_id != 0) {
 200     set_header(mod_zone_id, extra_headers, "HTTP_DEST_ZONE_SHORT_ID");
 201   }
 202   if (mod_pg_ver != 0) {
 203     set_header(mod_pg_ver, extra_headers, "HTTP_DEST_PG_VER");
 204   }
 205
 206   int r = (*req)->get_obj(key, extra_headers, obj);
 207   if (r < 0) {
 208     delete *req;
 209     *req = nullptr;
 210   }
 211
 212   return r;
 213 }
 214
 215 int RGWRESTConn::complete_request(RGWRESTStreamRWRequest *req, string& etag, real_time *mtime,
 216                                   uint64_t *psize, map<string, string>& attrs)
 217 {
 218   int ret = req->complete(etag, mtime, psize, attrs);
 219   delete req;
 220
 221   return ret;
 222 }
 223
 224 int RGWRESTConn::get_resource(const string& resource,
 225                      param_vec_t *extra_params,
 226                      map<string, string> *extra_headers,
 227                      bufferlist& bl,
 228                      RGWHTTPManager *mgr)
 229 {
 230   string url;
 231   int ret = get_url(url);
 232   if (ret < 0)
 233     return ret;
 234
 235   param_vec_t params;
 236
 237   if (extra_params) {
 238     params.insert(params.end(), extra_params->begin(), extra_params->end());
 239   }
 240
 241   populate_params(params, nullptr, self_zone_group);
 242
 243   RGWStreamIntoBufferlist cb(bl);
 244
 245   RGWRESTStreamReadRequest req(cct, url, &cb, NULL, &params);
 246
 247   map<string, string> headers;
 248   if (extra_headers) {
 249     headers.insert(extra_headers->begin(), extra_headers->end());
 250   }
 251
 252   ret = req.get_resource(key, headers, resource, mgr);
 253   if (ret < 0) {
 254     ldout(cct, 5) << __func__ << ": get_resource() resource=" << resource << " returned ret=" << ret << dendl;
 255     return ret;
 256   }
 257
 258   string etag;
 259   map<string, string> attrs;
 260   return req.complete(etag, NULL, NULL, attrs);
 261 }
 262
 263 RGWRESTReadResource::RGWRESTReadResource(RGWRESTConn *_conn,
 264                                          const string& _resource,
 265                                          const rgw_http_param_pair *pp,
 266                                          param_vec_t *extra_headers,
 267                                          RGWHTTPManager *_mgr)
 268   : cct(_conn->get_ctx()), conn(_conn), resource(_resource),
 269     params(make_param_list(pp)), cb(bl), mgr(_mgr),
 270     req(cct, conn->get_url(), &cb, NULL, NULL)
 271 {
 272   init_common(extra_headers);
 273 }
 274
 275 RGWRESTReadResource::RGWRESTReadResource(RGWRESTConn *_conn,
 276                                          const string& _resource,
 277                                          param_vec_t& _params,
 278                                          param_vec_t *extra_headers,
 279                                          RGWHTTPManager *_mgr)
 280   : cct(_conn->get_ctx()), conn(_conn), resource(_resource), params(_params),
 281     cb(bl), mgr(_mgr), req(cct, conn->get_url(), &cb, NULL, NULL)
 282 {
 283   init_common(extra_headers);
 284 }
 285
 286 void RGWRESTReadResource::init_common(param_vec_t *extra_headers)
 287 {
 288   populate_params(params, nullptr, conn->get_self_zonegroup());
 289
 290   if (extra_headers) {
 291     headers.insert(extra_headers->begin(), extra_headers->end());
 292   }
 293
 294   req.set_params(&params);
 295 }
 296
 297 int RGWRESTReadResource::read()
 298 {
 299   int ret = req.get_resource(conn->get_key(), headers, resource, mgr);
 300   if (ret < 0) {
 301     ldout(cct, 5) << __func__ << ": get_resource() resource=" << resource << " returned ret=" << ret << dendl;
 302     return ret;
 303   }
 304
 305   string etag;
 306   map<string, string> attrs;
 307   return req.complete(etag, NULL, NULL, attrs);
 308 }
 309
 310 int RGWRESTReadResource::aio_read()
 311 {
 312   int ret = req.get_resource(conn->get_key(), headers, resource, mgr);
 313   if (ret < 0) {
 314     ldout(cct, 5) << __func__ << ": get_resource() resource=" << resource << " returned ret=" << ret << dendl;
 315     return ret;
 316   }
 317
 318   return 0;
 319 }
 320
 321 RGWRESTSendResource::RGWRESTSendResource(RGWRESTConn *_conn,
 322                                          const string& _method,
 323                                          const string& _resource,
 324                                          const rgw_http_param_pair *pp,
 325                                          param_vec_t *extra_headers,
 326                                          RGWHTTPManager *_mgr)
 327   : cct(_conn->get_ctx()), conn(_conn), method(_method), resource(_resource),
 328     params(make_param_list(pp)), cb(bl), mgr(_mgr),
 329     req(cct, method.c_str(), conn->get_url(), &cb, NULL, NULL)
 330 {
 331   init_common(extra_headers);
 332 }
 333
 334 RGWRESTSendResource::RGWRESTSendResource(RGWRESTConn *_conn,
 335                                          const string& _method,
 336                                          const string& _resource,
 337                                          param_vec_t& params,
 338                                          param_vec_t *extra_headers,
 339                                          RGWHTTPManager *_mgr)
 340   : cct(_conn->get_ctx()), conn(_conn), method(_method), resource(_resource), params(params),
 341     cb(bl), mgr(_mgr), req(cct, method.c_str(), conn->get_url(), &cb, NULL, NULL)
 342 {
 343   init_common(extra_headers);
 344 }
 345
 346 void RGWRESTSendResource::init_common(param_vec_t *extra_headers)
 347 {
 348   populate_params(params, nullptr, conn->get_self_zonegroup());
 349
 350   if (extra_headers) {
 351     headers.insert(extra_headers->begin(), extra_headers->end());
 352   }
 353
 354   req.set_params(&params);
 355 }
 356
 357 int RGWRESTSendResource::send(bufferlist& outbl)
 358 {
 359   req.set_outbl(outbl);
 360   int ret = req.get_resource(conn->get_key(), headers, resource, mgr);
 361   if (ret < 0) {
 362     ldout(cct, 5) << __func__ << ": get_resource() resource=" << resource << " returned ret=" << ret << dendl;
 363     return ret;
 364   }
 365
 366   string etag;
 367   map<string, string> attrs;
 368   return req.complete(etag, NULL, NULL, attrs);
 369 }
 370
 371 int RGWRESTSendResource::aio_send(bufferlist& outbl)
 372 {
 373   req.set_outbl(outbl);
 374   int ret = req.get_resource(conn->get_key(), headers, resource, mgr);
 375   if (ret < 0) {
 376     ldout(cct, 5) << __func__ << ": get_resource() resource=" << resource << " returned ret=" << ret << dendl;
 377     return ret;
 378   }
 379
 380   return 0;
 381 }
 382