forked from restify/node-restify
/
restify.js
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/
restify.js
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// Copyright 2011 Mark Cavage <mcavage@gmail.com> All rights reserved.
var assert = require('assert');
var crypto = require('crypto');
var util = require('util');
var http = require('http');
var path = require('path');
var querystring = require('querystring');
var url = require('url');
var uuid = require('node-uuid');
var Constants = require('./constants');
var HttpCodes = require('./http_codes');
var RestCodes = require('./rest_codes');
var log = require('./log');
var newError = require('./error').newError;
// Just force this to extend http.ServerResponse
require('./http-extra');
var _response;
function _sanitizePath(path) {
assert.ok(path);
if (log.trace()) {
log.trace('_sanitizePath: path=%s', path);
}
// Be nice like apache and strip out any //my//foo//bar///blah
var _path = path.replace(/\/\/+/g, '/');
// Kill a trailing '/'
if (_path.lastIndexOf('/') === (_path.length - 1) &&
_path.length > 1) {
_path = _path.substr(0, _path.length - 1);
}
if (log.trace()) {
log.trace('_sanitizePath: returning %s', _path);
}
return _path;
}
/**
* Checks, if a mount matches, and if so, returns an object of all
* the :param variables.
*
* @param {String} path (request.url.pathname).
* @param {Object} route (what was mounted).
*/
function _matches(path, route) {
assert.ok(path);
assert.ok(route);
if (path === route.url) {
return {}; // there were no params in this case...
}
var params = route.urlComponents;
var components = path.split('/').splice(1);
var len = components.length;
if (components.length !== params.length) return null;
var parsed = {};
for (var i = 0; i < params.length; i++) {
var _url = url.parse(components[i]);
if (params[i] === _url.pathname) continue;
if (params[i].charAt(0) === ':') {
parsed[params[i].substr(1)] = _url.pathname;
continue;
}
return null;
}
return parsed;
}
function _parseRequest(request, response, next) {
assert.ok(request);
assert.ok(response);
assert.ok(next);
if (log.trace()) {
log.trace('_parseRequest:\n%s %s HTTP/%s\nHeaders: %o',
request.method,
request.url,
request.httpVersion,
request.headers);
}
response._accept = Constants.ContentTypeJson;
if (request.headers.accept && request.headers.accept !== '*/*') {
var _mediaRange = request.headers.accept.split(';');
if (!_mediaRange) {
return response.sendError(newError({
httpCode: HttpCodes.BadRequest,
restCode: RestCodes.InvalidArgument,
message: 'Accept header invalid: ' + request.headers.accept
}));
}
var _acceptTypes = _mediaRange[0].split('/');
if (!_acceptTypes || _acceptTypes.length !== 2) {
return response.sendError(newError({
httpCode: HttpCodes.BadRequest,
restCode: RestCodes.InvalidArgument,
message: 'Accept header invalid: ' + request.headers.accept
}));
}
if (_acceptTypes[0] !== '*') {
var type = request._config._acceptable[_acceptTypes[0]];
if (!type) {
if (log.trace()) {
log.trace('accept header type doesn\'t match application');
}
return response.sendError(newError({
httpCode: HttpCodes.NotAcceptable,
restCode: RestCodes.InvalidArgument,
message: request.headers.accept + ' unsupported',
details: server._config.acceptable
}));
}
response._accept = _acceptTypes[0] + '/';
}
if (_acceptTypes[1] !== '*') {
var subType;
var subTypes = request._config._acceptable[_acceptTypes[0]];
if (subTypes) {
for (var i = 0; i < subTypes.length; i++) {
if (subTypes[i] === _acceptTypes[1]) {
subType = subTypes[i];
break;
}
}
}
if (!subType) {
return response.sendError(newError({
httpCode: HttpCodes.NotAcceptable,
restCode: RestCodes.InvalidArgument,
message: request.headers.accept + ' unsupported',
details: server._config.acceptable
}));
}
response._accept += subType;
} else {
response._accept = Constants.ContentTypeJson;
}
}
if (!response._accept) {
response._accept = Constants.ContentTypeJson;
}
if (log.trace()) {
log.trace('Parsed accept type as: %s', response._accept);
}
if (request.headers.Date) {
try {
var _date = new Date(request.headers.Date);
var now = new Date();
if ((now.getTime() - _date.getTime()) > request._config.clockSkew) {
return response.sendError(newError({
httpCode: HttpCodes.BadRequest,
restCode: RestCodes.InvalidArgument,
message: 'Date header is too old'
}));
}
} catch (e) {
return response.sendError(newError({
httpCode: HttpCodes.BadRequest,
restCode: RestCodes.InvalidArgument,
message: 'Date header is invalid'
}));
}
}
// This is so common it's worth checking up front before we read data
// TODO (mcavage) fix this
var contentType = request.contentType();
if (contentType === 'multipart/form-data') {
return response.sendError(newError({
httpCode: HttpCodes.UnsupportedMediaType,
restCode: RestCodes.InvalidArgument,
message: 'multipart/form-data unsupported'
}));
}
if (request._config.apiVersion) {
if (request.headers[Constants.XApiVersion] ||
(request.headers[Constants.XApiVersion.toLowerCase()] !==
request._config.apiVersion)) {
return response.sendError(newError({
httpCode: HttpCodes.Conflict,
restCode: RestCodes.InvalidArgument,
message: Constants.XApiVersion + ' must be ' +
request._config.apiVersion
}));
}
}
request._url = url.parse(request.url);
if (request._url.query) {
var _qs = querystring.parse(request._url.query);
for (var k in _qs) {
if (_qs.hasOwnProperty(k)) {
assert.ok(!request.params[k]);
request.params[k] = _qs[k];
}
}
}
request.body = '';
request.on('data', function(chunk) {
if (request.body.length + chunk.length > request._config.maxRequestSize) {
return response.sendError(newError({
httpCode: HttpCodes.RequestTooLarge,
restCode: RestCodes.RequestTooLarge,
message: 'maximum HTTP data size is 8k'
}));
}
request.body += chunk;
});
request.on('end', function() {
if (request.body) {
var contentLen = request.headers['content-length'];
if (contentLen !== undefined) {
if (parseInt(contentLen, 10) !== request.body.length) {
return response.sendError(newError({
httpCode: HttpCodes.BadRequest,
restCode: RestCodes.InvalidHeader,
message: 'Content-Length=' + contentLen +
' didn\'t match actual length=' + request.body.length
}));
}
}
var bParams;
if (contentType === Constants.ContentTypeFormEncoded) {
bParams = querystring.parse(request.body) || {};
} else if (contentType === Constants.ContentTypeJson) {
try {
bParams = JSON.parse(request.body);
} catch (e) {
return response.sendError(newError({
httpCode: HttpCodes.BadRequest,
restCode: RestCodes.InvalidArgument,
message: 'Invalid JSON: ' + e.message
}));
}
} else if (contentType) {
return response.sendError(newError({
httpCode: HttpCodes.UnsupportedMediaType,
restCode: RestCodes.InvalidArgument,
message: contentType + ' unsupported'
}));
}
for (var k in bParams) {
if (bParams.hasOwnProperty(k)) {
if (request.params.hasOwnProperty(k)) {
return response.sendError(newError({
httpCode: HttpCodes.Conflict,
restCode: RestCodes.InvalidArgument,
message: 'duplicate parameter detected: ' + k
}));
}
request.params[k] = bParams[k];
}
}
}
if (log.trace()) {
log.trace('_parseRequest: params parsed as: %o', request.params);
}
return next();
});
}
module.exports = {
createServer: function(options) {
var server = http.createServer(function(request, response) {
assert.ok(request);
assert.ok(response);
_response = response;
request.requestId = response.requestId = uuid().toLowerCase();
request._config = server._config;
response._config = server._config;
request.startTime = response.startTime = new Date().getTime();
response._allowedMethods = [];
var route;
var params;
var i, k;
var path = _sanitizePath(request.url);
request.url = path;
if (server.routes[request.method]) {
var routes = server.routes[request.method];
for (i = 0; i < routes.length; i++) {
params = _matches(path, routes[i]);
if (params) {
route = routes[i];
break;
}
}
}
if (route) {
server.routes.urls[route.url].forEach(function(r) {
response._allowedMethods.push(r.method);
});
if (!request.params) request.params = {};
if (!request.uriParams) request.uriParams = {};
for (k in params) {
if (params.hasOwnProperty(k)) {
assert.ok(!request.uriParams.hasOwnProperty(k));
request.uriParams[k] = params[k];
}
}
log.trace('request uri parameters now: %o', request.uriParams);
var _i = 0;
_parseRequest(request, response, function() {
var self = arguments.callee;
if (route.handlers[_i]) {
if (log.trace()) {
log.trace('Running handler: %s:: %d', request.method, _i);
}
return route.handlers[_i++].call(this, request, response, self);
} else {
_response = null;
}
});
} else {
// if(route)
// Try to send back a meaningful error code (e.g., method not supported
// rather than just 404).
// The only way we got here was if the method didn't match, so this
// loop is solely to send back a 405 rather than a 404. Sucks we have
// to do an O(N^2) walk (I guess we could do a tree or something, but
// bah, whatever, if you have that many urls...).
var _code = HttpCodes.NotFound;
for (k in server.routes.urls) {
if (server.routes.urls.hasOwnProperty(k)) {
route = server.routes.urls[k];
var _methods = [];
for (i = 0; i < route.length; i++) {
_methods.push(route[i]);
if (_matches(path, route[i])) {
_code = HttpCodes.BadMethod;
}
}
if (_code === HttpCodes.BadMethod) {
response._allowedMethods = _methods;
break;
}
}
}
response.send(_code);
_response = null;
}
});
server.logLevel = function(level) {
return log.level(level);
};
server.routes = {};
server._config = {};
server._config.apiVersion = undefined;
function _errorHandler(e) {
process.on('uncaughtException', function(e) {
log.warn('uncaughtException: ' + (e.stack ? e.stack : e));
if (_response) {
_response.writeHead(HttpCodes.InternalError);
_response.end();
_response = null;
}
});
};
if (options) {
if (options.apiVersion) {
server._config.apiVersion = options.apiVersion;
}
if (options.serverName) {
server._config.serverName = options.serverName;
}
if (options.exceptionHandler) {
process.on('uncaughtException', options.exceptionHandler);
}
if (options.maxRequestSize) {
server._config.maxRequestSize = options.maxRequestSize;
}
if (options.acceptable) {
server._config.acceptable = options.acceptable;
}
if (options.accept) {
server._config.acceptable = options.accept;
}
if (options.clockSkew) {
server._config.clockSkew = options.clockSkew * 1000;
}
}
if (!server._config.serverName) {
server._config.serverName = Constants.DefaultServerName;
}
if (!server._config.maxRequestSize) {
server._config.maxRequestSize = 8192;
}
if (!server._config.clockSkew) {
server._config.clockSkew = 300 * 1000; // Default 5m
}
if (!server._config.acceptable) {
server._config.acceptable = [
'application/json'
];
}
if (!options &&
!options.exceptionHandler) {
process.on('uncaughtException', function(e) {
log.warn('uncaughtException: ' + (e.stack ? e.stack : e));
if (_response) {
_response.writeHead(HttpCodes.InternalError);
_response.end();
_response = null;
}
});
}
server._config._acceptable = {};
for (var i = 0; i < server._config.acceptable.length; i++) {
var tmp = server._config.acceptable[i].split('/');
if (!server._config._acceptable[tmp[0]]) {
server._config._acceptable[tmp[0]] = [tmp[1]];
} else {
var found = false;
for (var j = 0; j < server._config._acceptable[tmp[0]].length; j++) {
if (server._config._acceptable[tmp[0]][j] === tmp[1]) {
found = true;
break;
}
}
if (!found) {
server._config._acceptable[tmp[0]].push(tmp[1]);
}
}
}
return server;
},
LogLevel: log.Level,
log: log,
newError: newError,
HttpCodes: HttpCodes,
RestCodes: RestCodes
};