iot-sol
Version:
Intel(r) IoT Services Orchestration Layer - HTML5 IDE + Node.js middleware to create and host distributed IoT Apps in minutes
231 lines (220 loc) • 10.6 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 http = require("follow-redirects").http;
var https = require("follow-redirects").https;
var urllib = require("url");
var mustache = require("mustache");
var querystring = require("querystring");
function HTTPRequest(n) {
RED.nodes.createNode(this,n);
var node = this;
var nodeUrl = n.url;
var isTemplatedUrl = (nodeUrl||"").indexOf("{{") != -1;
var nodeMethod = n.method || "GET";
if (n.tls) {
var tlsNode = RED.nodes.getNode(n.tls);
}
this.ret = n.ret || "txt";
if (RED.settings.httpRequestTimeout) { this.reqTimeout = parseInt(RED.settings.httpRequestTimeout) || 120000; }
else { this.reqTimeout = 120000; }
var prox, noprox;
if (process.env.http_proxy != null) { prox = process.env.http_proxy; }
if (process.env.HTTP_PROXY != null) { prox = process.env.HTTP_PROXY; }
if (process.env.no_proxy != null) { noprox = process.env.no_proxy.split(","); }
if (process.env.NO_PROXY != null) { noprox = process.env.NO_PROXY.split(","); }
this.on("input",function(msg) {
var preRequestTimestamp = process.hrtime();
node.status({fill:"blue",shape:"dot",text:"httpin.status.requesting"});
var url = nodeUrl || msg.url;
if (msg.url && nodeUrl && (nodeUrl !== msg.url)) { // revert change below when warning is finally removed
node.warn(RED._("common.errors.nooverride"));
}
if (isTemplatedUrl) {
url = mustache.render(nodeUrl,msg);
}
if (!url) {
node.error(RED._("httpin.errors.no-url"),msg);
return;
}
// url must start http:// or https:// so assume http:// if not set
if (!((url.indexOf("http://") === 0) || (url.indexOf("https://") === 0))) {
if (tlsNode) {
url = "https://"+url;
} else {
url = "http://"+url;
}
}
var method = nodeMethod.toUpperCase() || "GET";
if (msg.method && n.method && (n.method !== "use")) { // warn if override option not set
node.warn(RED._("common.errors.nooverride"));
}
if (msg.method && n.method && (n.method === "use")) {
method = msg.method.toUpperCase(); // use the msg parameter
}
var opts = urllib.parse(url);
opts.method = method;
opts.headers = {};
if (msg.headers) {
for (var v in msg.headers) {
if (msg.headers.hasOwnProperty(v)) {
var name = v.toLowerCase();
if (name !== "content-type" && name !== "content-length") {
// only normalise the known headers used later in this
// function. Otherwise leave them alone.
name = v;
}
opts.headers[name] = msg.headers[v];
}
}
}
if (this.credentials && this.credentials.user) {
opts.auth = this.credentials.user+":"+(this.credentials.password||"");
}
var payload = null;
if (msg.payload && (method == "POST" || method == "PUT" || method == "PATCH" ) ) {
if (typeof msg.payload === "string" || Buffer.isBuffer(msg.payload)) {
payload = msg.payload;
} else if (typeof msg.payload == "number") {
payload = msg.payload+"";
} else {
if (opts.headers['content-type'] == 'application/x-www-form-urlencoded') {
payload = querystring.stringify(msg.payload);
} else {
payload = JSON.stringify(msg.payload);
if (opts.headers['content-type'] == null) {
opts.headers['content-type'] = "application/json";
}
}
}
if (opts.headers['content-length'] == null) {
if (Buffer.isBuffer(payload)) {
opts.headers['content-length'] = payload.length;
} else {
opts.headers['content-length'] = Buffer.byteLength(payload);
}
}
}
var urltotest = url;
var noproxy;
if (noprox) {
for (var i in noprox) {
if (url.indexOf(noprox[i]) !== -1) { noproxy=true; }
}
}
if (prox && !noproxy) {
var match = prox.match(/^(http:\/\/)?(.+)?:([0-9]+)?/i);
if (match) {
//opts.protocol = "http:";
//opts.host = opts.hostname = match[2];
//opts.port = (match[3] != null ? match[3] : 80);
opts.headers['Host'] = opts.host;
var heads = opts.headers;
var path = opts.pathname = opts.href;
opts = urllib.parse(prox);
opts.path = opts.pathname = path;
opts.headers = heads;
opts.method = method;
//console.log(opts);
urltotest = match[0];
}
else { node.warn("Bad proxy url: "+process.env.http_proxy); }
}
if (tlsNode) {
tlsNode.addTLSOptions(opts);
}
var req = ((/^https/.test(urltotest))?https:http).request(opts,function(res) {
(node.ret === "bin") ? res.setEncoding('binary') : res.setEncoding('utf8');
msg.statusCode = res.statusCode;
msg.headers = res.headers;
msg.payload = "";
// msg.url = url; // revert when warning above finally removed
res.on('data',function(chunk) {
msg.payload += chunk;
});
res.on('end',function() {
if (node.metric()) {
// Calculate request time
var diff = process.hrtime(preRequestTimestamp);
var ms = diff[0] * 1e3 + diff[1] * 1e-6;
var metricRequestDurationMillis = ms.toFixed(3);
node.metric("duration.millis", msg, metricRequestDurationMillis);
if (res.client && res.client.bytesRead) {
node.metric("size.bytes", msg, res.client.bytesRead);
}
}
if (node.ret === "bin") {
msg.payload = new Buffer(msg.payload,"binary");
}
else if (node.ret === "obj") {
try { msg.payload = JSON.parse(msg.payload); }
catch(e) { node.warn(RED._("httpin.errors.json-error")); }
}
node.send(msg);
node.status({});
});
});
req.setTimeout(node.reqTimeout, function() {
node.error(RED._("common.notification.errors.no-response"),msg);
setTimeout(function() {
node.status({fill:"red",shape:"ring",text:"common.notification.errors.no-response"});
},10);
req.abort();
});
req.on('error',function(err) {
node.error(err,msg);
msg.payload = err.toString() + " : " + url;
msg.statusCode = err.code;
node.send(msg);
node.status({fill:"red",shape:"ring",text:err.code});
});
if (payload) {
req.write(payload);
}
req.end();
});
}
RED.nodes.registerType("http request",HTTPRequest,{
credentials: {
user: {type:"text"},
password: {type: "password"}
}
});
}