iot-sol
Version:
Intel(r) IoT Services Orchestration Layer - HTML5 IDE + Node.js middleware to create and host distributed IoT Apps in minutes
334 lines (304 loc) • 13.1 kB
JavaScript
/******************************************************************************
Copyright (c) 2016, Intel Corporation
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
/**
* Copyright 2013, 2016 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
module.exports = function(RED) {
"use strict";
var bodyParser = require("body-parser");
var cookieParser = require("cookie-parser");
var getBody = require('raw-body');
var cors = require('cors');
var jsonParser = bodyParser.json();
var urlencParser = bodyParser.urlencoded({extended:true});
var onHeaders = require('on-headers');
var typer = require('media-typer');
var isUtf8 = require('is-utf8');
function rawBodyParser(req, res, next) {
if (req._body) { return next(); }
req.body = "";
req._body = true;
var isText = true;
var checkUTF = false;
if (req.headers['content-type']) {
var parsedType = typer.parse(req.headers['content-type'])
if (parsedType.type === "text") {
isText = true;
} else if (parsedType.subtype === "xml" || parsedType.suffix === "xml") {
isText = true;
} else if (parsedType.type !== "application") {
isText = false;
} else if (parsedType.subtype !== "octet-stream") {
checkUTF = true;
}
}
getBody(req, {
length: req.headers['content-length'],
encoding: isText ? "utf8" : null
}, function (err, buf) {
if (err) { return next(err); }
if (!isText && checkUTF && isUtf8(buf)) {
buf = buf.toString()
}
req.body = buf;
next();
});
}
var corsSetup = false;
function createRequestWrapper(node,req) {
// This misses a bunch of properties (eg headers). Before we use this function
// need to ensure it captures everything documented by Express and HTTP modules.
var wrapper = {
_req: req
};
var toWrap = [
"param",
"get",
"is",
"acceptsCharset",
"acceptsLanguage",
"app",
"baseUrl",
"body",
"cookies",
"fresh",
"hostname",
"ip",
"ips",
"originalUrl",
"params",
"path",
"protocol",
"query",
"route",
"secure",
"signedCookies",
"stale",
"subdomains",
"xhr",
"socket" // TODO: tidy this up
];
toWrap.forEach(function(f) {
if (typeof req[f] === "function") {
wrapper[f] = function() {
node.warn(RED._("httpin.errors.deprecated-call",{method:"msg.req."+f}));
var result = req[f].apply(req,arguments);
if (result === req) {
return wrapper;
} else {
return result;
}
}
} else {
wrapper[f] = req[f];
}
});
return wrapper;
}
function createResponseWrapper(node,res) {
var wrapper = {
_res: res
};
var toWrap = [
"append",
"attachment",
"cookie",
"clearCookie",
"download",
"end",
"format",
"get",
"json",
"jsonp",
"links",
"location",
"redirect",
"render",
"send",
"sendfile",
"sendFile",
"sendStatus",
"set",
"status",
"type",
"vary"
];
toWrap.forEach(function(f) {
wrapper[f] = function() {
node.warn(RED._("httpin.errors.deprecated-call",{method:"msg.res."+f}));
var result = res[f].apply(res,arguments);
if (result === res) {
return wrapper;
} else {
return result;
}
}
});
return wrapper;
}
var corsHandler = function(req,res,next) { next(); }
if (RED.settings.httpNodeCors) {
corsHandler = cors(RED.settings.httpNodeCors);
RED.httpNode.options("*",corsHandler);
}
function HTTPIn(n) {
RED.nodes.createNode(this,n);
if (RED.settings.httpNodeRoot !== false) {
if (!n.url) {
this.warn(RED._("httpin.errors.missing-path"));
return;
}
this.url = n.url;
this.method = n.method;
this.swaggerDoc = n.swaggerDoc;
var node = this;
this.errorHandler = function(err,req,res,next) {
node.warn(err);
res.sendStatus(500);
};
this.callback = function(req,res) {
var msgid = RED.util.generateId();
res._msgid = msgid;
if (node.method.match(/^(post|delete|put|options|patch)$/)) {
node.send({_msgid:msgid,req:req,res:createResponseWrapper(node,res),payload:req.body});
} else if (node.method == "get") {
node.send({_msgid:msgid,req:req,res:createResponseWrapper(node,res),payload:req.query});
} else {
node.send({_msgid:msgid,req:req,res:createResponseWrapper(node,res)});
}
};
var httpMiddleware = function(req,res,next) { next(); }
if (RED.settings.httpNodeMiddleware) {
if (typeof RED.settings.httpNodeMiddleware === "function") {
httpMiddleware = RED.settings.httpNodeMiddleware;
}
}
var metricsHandler = function(req,res,next) { next(); }
if (this.metric()) {
metricsHandler = function(req, res, next) {
var startAt = process.hrtime();
onHeaders(res, function() {
if (res._msgid) {
var diff = process.hrtime(startAt);
var ms = diff[0] * 1e3 + diff[1] * 1e-6;
var metricResponseTime = ms.toFixed(3);
var metricContentLength = res._headers["content-length"];
//assuming that _id has been set for res._metrics in HttpOut node!
node.metric("response.time.millis", {_msgid:res._msgid} , metricResponseTime);
node.metric("response.content-length.bytes", {_msgid:res._msgid} , metricContentLength);
}
});
next();
};
}
if (this.method == "get") {
RED.httpNode.get(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,this.callback,this.errorHandler);
} else if (this.method == "post") {
RED.httpNode.post(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
} else if (this.method == "put") {
RED.httpNode.put(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
} else if (this.method == "patch") {
RED.httpNode.patch(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
} else if (this.method == "delete") {
RED.httpNode.delete(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
}
this.on("close",function() {
var node = this;
RED.httpNode._router.stack.forEach(function(route,i,routes) {
if (route.route && route.route.path === node.url && route.route.methods[node.method]) {
routes.splice(i,1);
}
});
});
} else {
this.warn(RED._("httpin.errors.not-created"));
}
}
RED.nodes.registerType("http in",HTTPIn);
function HTTPOut(n) {
RED.nodes.createNode(this,n);
var node = this;
this.on("input",function(msg) {
if (msg.res) {
if (msg.headers) {
msg.res._res.set(msg.headers);
}
if (msg.cookies) {
for (var name in msg.cookies) {
if (msg.cookies.hasOwnProperty(name)) {
if (msg.cookies[name] === null || msg.cookies[name].value === null) {
if (msg.cookies[name]!==null) {
msg.res._res.clearCookie('name',msg.cookies[name]);
} else {
msg.res._res.clearCookie('name');
}
} else if (typeof msg.cookies[name] === 'object') {
msg.res._res.cookie(name,msg.cookies[name].value,msg.cookies[name]);
} else {
msg.res._res.cookie(name,msg.cookies[name]);
}
}
}
}
var statusCode = msg.statusCode || 200;
if (typeof msg.payload == "object" && !Buffer.isBuffer(msg.payload)) {
msg.res._res.status(statusCode).jsonp(msg.payload);
} else {
if (msg.res._res.get('content-length') == null) {
var len;
if (msg.payload == null) {
len = 0;
} else if (Buffer.isBuffer(msg.payload)) {
len = msg.payload.length;
} else if (typeof msg.payload == "number") {
len = Buffer.byteLength(""+msg.payload);
} else {
len = Buffer.byteLength(msg.payload);
}
msg.res._res.set('content-length', len);
}
if (typeof msg.payload === "number") {
msg.payload = ""+msg.payload;
}
msg.res._res.status(statusCode).send(msg.payload);
}
} else {
node.warn(RED._("httpin.errors.no-response"));
}
});
}
RED.nodes.registerType("http response",HTTPOut);
}