wallet-core/node_modules/ws/lib/Extensions.js

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2016-11-03 01:33:53 +01:00
var util = require('util');
/**
* Module exports.
*/
exports.parse = parse;
exports.format = format;
/**
* Parse extensions header value
*/
function parse(value) {
value = value || '';
var extensions = {};
value.split(',').forEach(function(v) {
var params = v.split(';');
var token = params.shift().trim();
var paramsList = extensions[token] = extensions[token] || [];
var parsedParams = {};
params.forEach(function(param) {
var parts = param.trim().split('=');
var key = parts[0];
var value = parts[1];
if (typeof value === 'undefined') {
value = true;
} else {
// unquote value
if (value[0] === '"') {
value = value.slice(1);
}
if (value[value.length - 1] === '"') {
value = value.slice(0, value.length - 1);
}
}
(parsedParams[key] = parsedParams[key] || []).push(value);
});
paramsList.push(parsedParams);
});
return extensions;
}
/**
* Format extensions header value
*/
function format(value) {
return Object.keys(value).map(function(token) {
var paramsList = value[token];
if (!util.isArray(paramsList)) {
paramsList = [paramsList];
}
return paramsList.map(function(params) {
return [token].concat(Object.keys(params).map(function(k) {
var p = params[k];
if (!util.isArray(p)) p = [p];
return p.map(function(v) {
return v === true ? k : k + '=' + v;
}).join('; ');
})).join('; ');
}).join(', ');
}).join(', ');
}