/var/www/verywell.gr/server/delivery/node_modules/google-gax/build/src
Edit: /var/www/verywell.gr/server/delivery/node_modules/google-gax/build/src/streamArrayParser.js (6212B)
"use strict";
/**
* Copyright 2021 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.StreamArrayParser = void 0;
const abort_controller_1 = require("abort-controller");
const stream_1 = require("stream");
const fallbackRest_1 = require("./fallbackRest");
const featureDetection_1 = require("./featureDetection");
class StreamArrayParser extends stream_1.Transform {
/**
* StreamArrayParser processes array of valid JSON objects in random chunks
* through readable stream, and produces a stream of plain Javascript objects
* where it converted from the corresponding protobuf message instance.
*
* The default JSON parser decodes the input stream under the
* following rules:
* 1. The stream represents a valid JSON array (must start with a "[" and
* close with the corresponding "]"). Each element of this array is assumed to
* be either an array or an object, and will be decoded as a JS object and
* delivered.
* 2. All JSON elements in the buffer will be decoded and delivered in a
* stream.
*
* @private
* @constructor
* @param {protobuf.Method} rpc - the protobuf method produce array of JSON.
* @param {Object} options - the options pass to Transform Stream. See more
* details
* https://nodejs.org/api/stream.html#stream_new_stream_transform_options.
*/
constructor(rpc, options) {
super(Object.assign({}, options, { readableObjectMode: true }));
this._done = false;
this._prevBlock = Buffer.from('');
this._isInString = false;
this._isSkipped = false;
this._level = 0;
this.rpc = rpc;
this.cancelController = featureDetection_1.hasAbortController()
? // eslint-disable-next-line no-undef
new AbortController()
: new abort_controller_1.AbortController();
this.cancelSignal = this.cancelController.signal;
this.cancelRequested = false;
}
_transform(chunk, _, callback) {
let objectStart = 0;
let curIndex = 0;
if (this._level === 0 && curIndex === 0) {
if (String.fromCharCode(chunk[0]) !== '[') {
this.emit('error', new Error(`Internal Error: API service stream data must start with a '[' and close with the corresponding ']', but it start with ${String.fromCharCode(chunk[0])}`));
}
curIndex++;
this._level++;
}
while (curIndex < chunk.length) {
const curValue = String.fromCharCode(chunk[curIndex]);
if (!this._isSkipped) {
switch (curValue) {
case '{':
// Check if it's in string, we ignore the curly brace in string.
// Otherwise the object level++.
if (!this._isInString) {
this._level++;
}
if (!this._isInString && this._level === 2) {
objectStart = curIndex;
}
break;
case '"':
// Flip the string status
this._isInString = !this._isInString;
break;
case '}':
// check if it's in string
// if true, do nothing
// if false and level = 0, push data
if (!this._isInString) {
this._level--;
}
if (!this._isInString && this._level === 1) {
// find a object
const objBuff = Buffer.concat([
this._prevBlock,
chunk.slice(objectStart, curIndex + 1),
]);
try {
// HTTP reponse.ok is true.
const msgObj = fallbackRest_1.decodeResponse(this.rpc, true, objBuff);
this.push(msgObj);
}
catch (err) {
this.emit('error', err);
}
objectStart = curIndex + 1;
this._prevBlock = Buffer.from('');
}
break;
case ']':
if (!this._isInString && this._level === 1) {
this._done = true;
this.push(null);
}
break;
case '\\':
// Escaping escape character.
this._isSkipped = true;
break;
default:
break;
}
}
else {
this._isSkipped = false;
}
curIndex++;
}
if (this._level > 1) {
this._prevBlock = Buffer.concat([
this._prevBlock,
chunk.slice(objectStart, curIndex),
]);
}
callback();
}
_flush(callback) {
callback();
}
cancel() {
this._done = true;
this.cancelRequested = true;
this.cancelController.abort();
this.end();
}
}
exports.StreamArrayParser = StreamArrayParser;
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