82 lines
1.7 KiB
JavaScript
82 lines
1.7 KiB
JavaScript
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var util = require('util');
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/**
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* Module exports.
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*/
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exports.parse = parse;
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exports.format = format;
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/**
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* Parse extensions header value
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*/
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function parse(value) {
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value = value || '';
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var extensions = {};
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value.split(',').forEach(function(v) {
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var params = v.split(';');
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var token = params.shift().trim();
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if (extensions[token] === undefined) {
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extensions[token] = [];
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} else if (!extensions.hasOwnProperty(token)) {
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return;
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}
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var parsedParams = {};
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params.forEach(function(param) {
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var parts = param.trim().split('=');
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var key = parts[0];
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var value = parts[1];
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if (typeof value === 'undefined') {
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value = true;
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} else {
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// unquote value
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if (value[0] === '"') {
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value = value.slice(1);
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}
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if (value[value.length - 1] === '"') {
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value = value.slice(0, value.length - 1);
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}
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}
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if (parsedParams[key] === undefined) {
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parsedParams[key] = [value];
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} else if (parsedParams.hasOwnProperty(key)) {
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parsedParams[key].push(value);
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}
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});
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extensions[token].push(parsedParams);
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});
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return extensions;
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}
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/**
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* Format extensions header value
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*/
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function format(value) {
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return Object.keys(value).map(function(token) {
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var paramsList = value[token];
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if (!util.isArray(paramsList)) {
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paramsList = [paramsList];
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}
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return paramsList.map(function(params) {
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return [token].concat(Object.keys(params).map(function(k) {
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var p = params[k];
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if (!util.isArray(p)) p = [p];
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return p.map(function(v) {
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return v === true ? k : k + '=' + v;
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}).join('; ');
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})).join('; ');
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}).join(', ');
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}).join(', ');
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}
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