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https://github.com/xuxiaobo-bobo/boda_jsEnv.git
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68 lines
2.4 KiB
JavaScript
68 lines
2.4 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.positiveIntermediate = exports.positiveCompletion = exports.isMultiline = exports.isSingleLine = exports.parseControlResponse = void 0;
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const LF = "\n";
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/**
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* Parse an FTP control response as a collection of messages. A message is a complete
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* single- or multiline response. A response can also contain multiple multiline responses
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* that will each be represented by a message. A response can also be incomplete
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* and be completed on the next incoming data chunk for which case this function also
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* describes a `rest`. This function converts all CRLF to LF.
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*/
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function parseControlResponse(text) {
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const lines = text.split(/\r?\n/).filter(isNotBlank);
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const messages = [];
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let startAt = 0;
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let tokenRegex;
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for (let i = 0; i < lines.length; i++) {
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const line = lines[i];
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// No group has been opened.
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if (!tokenRegex) {
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if (isMultiline(line)) {
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// Open a group by setting an expected token.
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const token = line.substr(0, 3);
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tokenRegex = new RegExp(`^${token}(?:$| )`);
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startAt = i;
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}
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else if (isSingleLine(line)) {
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// Single lines can be grouped immediately.
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messages.push(line);
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}
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}
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// Group has been opened, expect closing token.
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else if (tokenRegex.test(line)) {
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tokenRegex = undefined;
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messages.push(lines.slice(startAt, i + 1).join(LF));
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}
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}
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// The last group might not have been closed, report it as a rest.
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const rest = tokenRegex ? lines.slice(startAt).join(LF) + LF : "";
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return { messages, rest };
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}
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exports.parseControlResponse = parseControlResponse;
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function isSingleLine(line) {
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return /^\d\d\d(?:$| )/.test(line);
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}
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exports.isSingleLine = isSingleLine;
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function isMultiline(line) {
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return /^\d\d\d-/.test(line);
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}
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exports.isMultiline = isMultiline;
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/**
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* Return true if an FTP return code describes a positive completion.
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*/
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function positiveCompletion(code) {
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return code >= 200 && code < 300;
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}
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exports.positiveCompletion = positiveCompletion;
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/**
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* Return true if an FTP return code describes a positive intermediate response.
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*/
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function positiveIntermediate(code) {
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return code >= 300 && code < 400;
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}
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exports.positiveIntermediate = positiveIntermediate;
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function isNotBlank(str) {
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return str.trim() !== "";
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}
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