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import * as hrana from "@libsql/hrana-client";
import { LibsqlError } from "@libsql/core/api";
import { expandConfig } from "@libsql/core/config";
import { HranaTransaction, executeHranaBatch, stmtToHrana, resultSetFromHrana, mapHranaError, } from "./hrana.js";
import { SqlCache } from "./sql_cache.js";
import { encodeBaseUrl } from "@libsql/core/uri";
import { supportedUrlLink } from "@libsql/core/util";
import promiseLimit from "promise-limit";
export * from "@libsql/core/api";
export function createClient(config) {
return _createClient(expandConfig(config, true));
}
/** @private */
export function _createClient(config) {
if (config.scheme !== "https" && config.scheme !== "http") {
throw new LibsqlError('The HTTP client supports only "libsql:", "https:" and "http:" URLs, ' +
`got ${JSON.stringify(config.scheme + ":")}. For more information, please read ${supportedUrlLink}`, "URL_SCHEME_NOT_SUPPORTED");
}
if (config.encryptionKey !== undefined) {
throw new LibsqlError("Encryption key is not supported by the remote client.", "ENCRYPTION_KEY_NOT_SUPPORTED");
}
if (config.scheme === "http" && config.tls) {
throw new LibsqlError(`A "http:" URL cannot opt into TLS by using ?tls=1`, "URL_INVALID");
}
else if (config.scheme === "https" && !config.tls) {
throw new LibsqlError(`A "https:" URL cannot opt out of TLS by using ?tls=0`, "URL_INVALID");
}
const url = encodeBaseUrl(config.scheme, config.authority, config.path);
return new HttpClient(url, config.authToken, config.intMode, config.fetch, config.concurrency);
}
const sqlCacheCapacity = 30;
export class HttpClient {
#client;
protocol;
#authToken;
#promiseLimitFunction;
/** @private */
constructor(url, authToken, intMode, customFetch, concurrency) {
this.#client = hrana.openHttp(url, authToken, customFetch);
this.#client.intMode = intMode;
this.protocol = "http";
this.#authToken = authToken;
this.#promiseLimitFunction = promiseLimit(concurrency);
}
async limit(fn) {
return this.#promiseLimitFunction(fn);
}
async execute(stmtOrSql, args) {
let stmt;
if (typeof stmtOrSql === 'string') {
stmt = {
sql: stmtOrSql,
args: args || []
};
}
else {
stmt = stmtOrSql;
}
return this.limit(async () => {
try {
const hranaStmt = stmtToHrana(stmt);
// Pipeline all operations, so `hrana.HttpClient` can open the stream, execute the statement and
// close the stream in a single HTTP request.
let rowsPromise;
const stream = this.#client.openStream();
try {
rowsPromise = stream.query(hranaStmt);
}
finally {
stream.closeGracefully();
}
const rowsResult = await rowsPromise;
return resultSetFromHrana(rowsResult);
}
catch (e) {
throw mapHranaError(e);
}
});
}
async batch(stmts, mode = "deferred") {
return this.limit(async () => {
try {
const hranaStmts = stmts.map(stmtToHrana);
const version = await this.#client.getVersion();
// Pipeline all operations, so `hrana.HttpClient` can open the stream, execute the batch and
// close the stream in a single HTTP request.
let resultsPromise;
const stream = this.#client.openStream();
try {
// It makes sense to use a SQL cache even for a single batch, because it may contain the same
// statement repeated multiple times.
const sqlCache = new SqlCache(stream, sqlCacheCapacity);
sqlCache.apply(hranaStmts);
// TODO: we do not use a cursor here, because it would cause three roundtrips:
// 1. pipeline request to store SQL texts
// 2. cursor request
// 3. pipeline request to close the stream
const batch = stream.batch(false);
resultsPromise = executeHranaBatch(mode, version, batch, hranaStmts);
}
finally {
stream.closeGracefully();
}
const results = await resultsPromise;
return results;
}
catch (e) {
throw mapHranaError(e);
}
});
}
async transaction(mode = "write") {
return this.limit(async () => {
try {
const version = await this.#client.getVersion();
return new HttpTransaction(this.#client.openStream(), mode, version);
}
catch (e) {
throw mapHranaError(e);
}
});
}
async executeMultiple(sql) {
return this.limit(async () => {
try {
// Pipeline all operations, so `hrana.HttpClient` can open the stream, execute the sequence and
// close the stream in a single HTTP request.
let promise;
const stream = this.#client.openStream();
try {
promise = stream.sequence(sql);
}
finally {
stream.closeGracefully();
}
await promise;
}
catch (e) {
throw mapHranaError(e);
}
});
}
sync() {
throw new LibsqlError("sync not supported in http mode", "SYNC_NOT_SUPPORTED");
}
close() {
this.#client.close();
}
get closed() {
return this.#client.closed;
}
}
export class HttpTransaction extends HranaTransaction {
#stream;
#sqlCache;
/** @private */
constructor(stream, mode, version) {
super(mode, version);
this.#stream = stream;
this.#sqlCache = new SqlCache(stream, sqlCacheCapacity);
}
/** @private */
_getStream() {
return this.#stream;
}
/** @private */
_getSqlCache() {
return this.#sqlCache;
}
close() {
this.#stream.close();
}
get closed() {
return this.#stream.closed;
}
}