@azure/cosmos
Version:
Microsoft Azure Cosmos DB Service Node.js SDK for NOSQL API
137 lines • 6.83 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.SessionContainer = void 0;
const tslib_1 = require("tslib");
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
const atob_js_1 = tslib_1.__importDefault(require("../utils/atob.js"));
const index_js_1 = require("../common/index.js");
const VectorSessionToken_js_1 = require("./VectorSessionToken.js");
/** @hidden */
class SessionContainer {
constructor(collectionNameToCollectionResourceId = new Map(), collectionResourceIdToSessionTokens = new Map()) {
this.collectionNameToCollectionResourceId = collectionNameToCollectionResourceId;
this.collectionResourceIdToSessionTokens = collectionResourceIdToSessionTokens;
}
get(request) {
if (!request) {
throw new Error("request cannot be null");
}
const collectionName = (0, index_js_1.getContainerLink)((0, index_js_1.trimSlashes)(request.resourceAddress));
const rangeIdToTokenMap = this.getPartitionKeyRangeIdToTokenMap(collectionName);
return SessionContainer.getCombinedSessionTokenString(rangeIdToTokenMap);
}
remove(request) {
let collectionResourceId;
const resourceAddress = (0, index_js_1.trimSlashes)(request.resourceAddress);
const collectionName = (0, index_js_1.getContainerLink)(resourceAddress);
if (collectionName) {
collectionResourceId = this.collectionNameToCollectionResourceId.get(collectionName);
this.collectionNameToCollectionResourceId.delete(collectionName);
}
if (collectionResourceId !== undefined) {
this.collectionResourceIdToSessionTokens.delete(collectionResourceId);
}
}
set(request, resHeaders) {
// TODO: we check the master logic a few different places. Might not need it.
if (!resHeaders ||
SessionContainer.isReadingFromMaster(request.resourceType, request.operationType)) {
return;
}
const sessionTokenString = resHeaders[index_js_1.Constants.HttpHeaders.SessionToken];
if (!sessionTokenString) {
return;
}
const containerName = this.getContainerName(request, resHeaders);
const ownerId = !request.isNameBased
? request.resourceId
: resHeaders[index_js_1.Constants.HttpHeaders.OwnerId] || request.resourceId;
if (!ownerId) {
return;
}
if (containerName && this.validateOwnerID(ownerId)) {
if (!this.collectionResourceIdToSessionTokens.has(ownerId)) {
this.collectionResourceIdToSessionTokens.set(ownerId, new Map());
}
if (!this.collectionNameToCollectionResourceId.has(containerName)) {
this.collectionNameToCollectionResourceId.set(containerName, ownerId);
}
const containerSessionContainer = this.collectionResourceIdToSessionTokens.get(ownerId);
SessionContainer.compareAndSetToken(sessionTokenString, containerSessionContainer);
}
}
validateOwnerID(ownerId) {
// If ownerId contains exactly 8 bytes it represents a unique database+collection identifier. Otherwise it represents another resource
// The first 4 bytes are the database. The last 4 bytes are the collection.
// Cosmos rids potentially contain "-" which is an invalid character in the browser atob implementation
// See https://en.wikipedia.org/wiki/Base64#Filenames
return (0, atob_js_1.default)(ownerId.replace(/-/g, "/")).length === 8;
}
getPartitionKeyRangeIdToTokenMap(collectionName) {
let rangeIdToTokenMap = null;
if (collectionName && this.collectionNameToCollectionResourceId.has(collectionName)) {
rangeIdToTokenMap = this.collectionResourceIdToSessionTokens.get(this.collectionNameToCollectionResourceId.get(collectionName));
}
return rangeIdToTokenMap;
}
static getCombinedSessionTokenString(tokens) {
if (!tokens || tokens.size === 0) {
return SessionContainer.EMPTY_SESSION_TOKEN;
}
let result = "";
for (const [range, token] of tokens.entries()) {
result +=
range +
SessionContainer.SESSION_TOKEN_PARTITION_SPLITTER +
token.toString() +
SessionContainer.SESSION_TOKEN_SEPARATOR;
}
return result.slice(0, -1);
}
static compareAndSetToken(newTokenString, containerSessionTokens) {
if (!newTokenString) {
return;
}
const partitionsParts = newTokenString.split(SessionContainer.SESSION_TOKEN_SEPARATOR);
for (const partitionPart of partitionsParts) {
const newTokenParts = partitionPart.split(SessionContainer.SESSION_TOKEN_PARTITION_SPLITTER);
if (newTokenParts.length !== 2) {
return;
}
const range = newTokenParts[0];
const newToken = VectorSessionToken_js_1.VectorSessionToken.create(newTokenParts[1]);
const tokenForRange = !containerSessionTokens.get(range)
? newToken
: containerSessionTokens.get(range).merge(newToken);
containerSessionTokens.set(range, tokenForRange);
}
}
// TODO: have a assert if the type doesn't mastch known types
static isReadingFromMaster(resourceType, operationType) {
if (resourceType === index_js_1.Constants.Path.OffersPathSegment ||
resourceType === index_js_1.Constants.Path.DatabasesPathSegment ||
resourceType === index_js_1.Constants.Path.UsersPathSegment ||
resourceType === index_js_1.Constants.Path.PermissionsPathSegment ||
resourceType === index_js_1.Constants.Path.TopologyPathSegment ||
resourceType === index_js_1.Constants.Path.DatabaseAccountPathSegment ||
resourceType === index_js_1.Constants.Path.PartitionKeyRangesPathSegment ||
(resourceType === index_js_1.Constants.Path.CollectionsPathSegment &&
operationType === index_js_1.OperationType.Query)) {
return true;
}
return false;
}
getContainerName(request, headers) {
let ownerFullName = headers[index_js_1.Constants.HttpHeaders.OwnerFullName];
if (!ownerFullName) {
ownerFullName = (0, index_js_1.trimSlashes)(request.resourceAddress);
}
return (0, index_js_1.getContainerLink)(ownerFullName);
}
}
exports.SessionContainer = SessionContainer;
SessionContainer.EMPTY_SESSION_TOKEN = "";
SessionContainer.SESSION_TOKEN_SEPARATOR = ",";
SessionContainer.SESSION_TOKEN_PARTITION_SPLITTER = ":";
//# sourceMappingURL=sessionContainer.js.map