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index.js
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index.js
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'use strict';
if (typeof global == 'undefined' && typeof window != 'undefined' && typeof window.alert === 'function') {
var err = new Error('[FATAL ERROR]require-node should not run in browser, because it has code: require("../.." + modulePath)!');
alert(err.message);
throw err;
}
var _jsonEx = require('./_jsonEx');
var getConfig = require('./config');
var config;
module.exports = function (options) {
if (options.resolve) {
console.warn('config.resolve is deprecated, please use config.preCall! Note: arguments changed!!');// eslint-disable-line no-console
}
if (options.reject) {
console.warn('config.reject is deprecated, please use config.postFetch! Note: arguments changed!!');// eslint-disable-line no-console
}
config = getConfig(options);
return call;
};
function call(req, res, next) {
return _formatReqRes(req, res).then(function () {
//TODO:: POST http://xxx.com/require-node?... HTTP/1.1, req.originalUrl=?
if (!req.originalUrl.startsWith(config.path)) {
throw new Error("__promise_break__");
}
var params = getParams(req);
//console.log('call params:', params);
var moduleName = params[0];
var moduleInstance = getModuleInstance(moduleName);
var functionNames = params[1];
var moduleFunction = getModuleFunction(moduleInstance, functionNames);
var actualParams = params[2];
var formalParams = getModuleFormalParams(moduleFunction);
const options2 = { req, res, moduleName, functionNames, formalParams, actualParams };
const p1 = Promise.resolve(config.preCall && config.preCall(options2));
const p2 = Promise.resolve(config.resolve && config.resolve(req, moduleName, functionNames, formalParams, actualParams));
return Promise.all([p1, p2]).then(function () {
var isCallback = moduleFunctionIsCallback(formalParams);
if (isCallback) {
var callbackResolve, callbackReject;
var callbackPromise = new Promise(function (resolve, reject) { callbackResolve = resolve; callbackReject = reject; });
var callback = function (err, result) {
if (err) {
callbackReject(err);
} else {
if (req.headers['x-require-node']) {
callbackResolve(arguments.length <= 2 ? result : Array.prototype.slice.call(arguments, 1));
} else {
callbackResolve(result);
}
}
};
}
parseActualParams(actualParams, actualParams, req, res);
parseActualParams(actualParams, formalParams, req, res, callback);
var result = moduleFunction.apply(moduleInstance, actualParams);
const ret = isCallback ? callbackPromise : result;
return config.postCall ? config.postCall(ret, options2) : ret;
});
}).then(function (result) {
if (res.finished) { //res.end() has call
return;
}
result = _jsonEx.encodeJSON(result);
if (req.headers['x-require-node']) {
res.status(200).send([null, result]);
} else {
if (result && result.$view) {
res.render(result.$view, result);
} else {
res.status(200).send(typeof result === 'number' ? (result + '') : result);
}
}
}).catch(function (err) {
if (next && err && err.message === '__promise_break__') {
return next();//next() and _formatReqRes() has return is for koa
}
config.isDebug && console.log('call err:', err);// eslint-disable-line no-console
if (err && err.stack) {
//let err.stack can stringify in funtion: res.status.send
Object.defineProperty(err, 'message', { value: err.message, enumerable: true });
config.isDebug && Object.defineProperty(err, 'stack', { value: err.stack, enumerable: true });
config.isDebug && console.log('call err enumerable stack:', err.stack);// eslint-disable-line no-console
}
if (res.finished) {
return;
}
if (req.headers['x-require-node']) {
res.status(200).send([err]);
} else {
if (err && err.$view && res.render) {
res.render(err.$view, err);
} else {
res.status(err.statusCode || 500).send(err);
}
}
});
}
function _formatReqRes(req, res) {
//console.log('req', req.url, req.originalUrl, req.body);
req.originalUrl = req.originalUrl || req.url;
if (!res.status) res.status = status => {
res.statusCode = status;
return res;
};
if (!res.send) res.send = data => {
res.setHeader('Content-Type', 'application/json');
res.end(typeof data === 'string' ? data : JSON.stringify(data));
};
return new Promise(function (resolve, reject) {
if (req.hasOwnProperty('body')) {
resolve();
} else {
require('body-parser').json({ limit: '800mb' })(req, res, resolve);
}
}).then(() => _jsonEx.decodeJSON(req.body));
}
// eslint-disable-next-line no-useless-escape
var pathPattern = /^\/([^\.\/]+)[\.\/]([^\(\[%]+)(?:(?:\(|\[|%5B)(.+)(?:\)|\]|%5D))?/i; //%5B is '[', %5D is ']'
function getParams(req) {
if (req.headers['x-require-node']) {
config.isDebug && console.log('x-require-node:', req.method, req.url);// eslint-disable-line no-console
if (req.body instanceof Array && req.body.length === 3 && req.body[1] instanceof Array && req.body[2] instanceof Array) {
return req.body;
}
} else {
var urlPath = req.originalUrl.split('?', 1)[0].slice(config.path.length);
var match = urlPath.match(pathPattern);
config.isDebug && console.log('call path match', match);// eslint-disable-line no-console
if (match) {
var params;
if (req.method === 'POST') {
params = req.body instanceof Array ? req.body : [];
} else {
params = match[3] ? JSON.parse('[' + decodeURIComponent(match[3]) + ']') : [];
}
//console.log('params',params);
return [decodeURIComponent(match[1]), [decodeURIComponent(match[2])], params];
}
}
var err = new Error('Bad Request Arguments');
err.statusCode = 400;
throw err;
}
function getModuleInstance(moduleName) {
if (moduleName.indexOf('../') != -1 || moduleName.indexOf('..\\') != -1) {
var err = new Error('Forbidden Module:' + moduleName);
err.statusCode = 403;
throw err;
}
if (config.base[moduleName]) {
return require(config.base[moduleName]);
} else if (config.base['']) {
return require(config.base[''] + moduleName);
} else {
const aliasName = moduleName.split('/', 1)[0];
if (config.base[aliasName]) {
return require(config.base[aliasName] + moduleName.slice(aliasName.length));
} else {
var err = new Error('Not Found Module:' + moduleName);
err.statusCode = 404;
throw err;
}
}
}
function getModuleFunction(moduleInstance, functionNames) {
let ret = moduleInstance;
for (var i = 0; i < functionNames.length; i++) {
ret = ret[functionNames[i]];
}
if (ret === moduleInstance || !ret) {
var err = new Error('Not Found Function:' + functionNames.join('.'));
err.statusCode = 404;
throw err;
}
return ret;
}
function getModuleFormalParams(moduleFunction) {
//提取形参列表
if (moduleFunction.$formalParams) {
return moduleFunction.$formalParams;
}
else {
var formalParamsStr = moduleFunction.toString().split(')')[0].split('(')[1];
var ret = formalParamsStr ? formalParamsStr.split(',').map(function (i) { return i.trim(); }) : [];
moduleFunction.$formalParams = ret;//缓存把结果缓存起来
return ret;
}
}
function parseActualParams(params, refParams, req, res, callback) {
var _$inject = config._inject(req, res, callback);
var $inject = config.inject ? config.inject(req, res, callback) : {};
refParams.forEach(function (refParam, index) {
params[index] = $inject[refParam] || _$inject[refParam] || params[index];
});
}
var callbackFunctionNames;
function moduleFunctionIsCallback(formalParams) {
if (!callbackFunctionNames) {
var callback = {};
var _$inject = config._inject({}, {}, callback);
var $inject = config.inject ? config.inject({}, {}, callback) : {};
callbackFunctionNames = [];
for (let key in _$inject) {
if (_$inject[key] === callback) {
callbackFunctionNames.push(key);
}
}
for (let key in $inject) {
if ($inject[key] === callback) {
callbackFunctionNames.push(key);
}
}
//console.log('callbackFunctionNames:', callbackFunctionNames);
}
return formalParams.length > 0 && callbackFunctionNames.indexOf(formalParams[formalParams.length - 1]) > -1;
}