mirror of https://github.com/node-red/node-red.git
366 lines
14 KiB
JavaScript
366 lines
14 KiB
JavaScript
/**
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* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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"use strict";
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var bodyParser = require("body-parser");
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var multer = require("multer");
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var cookieParser = require("cookie-parser");
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var getBody = require('raw-body');
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var cors = require('cors');
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var onHeaders = require('on-headers');
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var typer = require('content-type');
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var mediaTyper = require('media-typer');
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var isUtf8 = require('is-utf8');
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var hashSum = require("hash-sum");
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function rawBodyParser(req, res, next) {
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if (req.skipRawBodyParser) { next(); } // don't parse this if told to skip
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if (req._body) { return next(); }
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req.body = "";
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req._body = true;
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var isText = true;
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var checkUTF = false;
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if (req.headers['content-type']) {
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var contentType = typer.parse(req.headers['content-type'])
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if (contentType.type) {
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var parsedType = mediaTyper.parse(contentType.type);
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if (parsedType.type === "text") {
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isText = true;
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} else if (parsedType.subtype === "xml" || parsedType.suffix === "xml") {
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isText = true;
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} else if (parsedType.type !== "application") {
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isText = false;
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} else if ((parsedType.subtype !== "octet-stream")
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&& (parsedType.subtype !== "cbor")
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&& (parsedType.subtype !== "x-protobuf")) {
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checkUTF = true;
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} else {
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// application/octet-stream or application/cbor
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isText = false;
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}
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}
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}
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getBody(req, {
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length: req.headers['content-length'],
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encoding: isText ? "utf8" : null
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}, function (err, buf) {
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if (err) { return next(err); }
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if (!isText && checkUTF && isUtf8(buf)) {
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buf = buf.toString()
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}
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req.body = buf;
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next();
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});
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}
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var corsSetup = false;
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function createRequestWrapper(node,req) {
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// This misses a bunch of properties (eg headers). Before we use this function
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// need to ensure it captures everything documented by Express and HTTP modules.
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var wrapper = {
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_req: req
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};
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var toWrap = [
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"param",
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"get",
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"is",
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"acceptsCharset",
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"acceptsLanguage",
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"app",
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"baseUrl",
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"body",
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"cookies",
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"fresh",
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"hostname",
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"ip",
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"ips",
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"originalUrl",
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"params",
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"path",
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"protocol",
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"query",
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"route",
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"secure",
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"signedCookies",
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"stale",
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"subdomains",
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"xhr",
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"socket" // TODO: tidy this up
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];
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toWrap.forEach(function(f) {
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if (typeof req[f] === "function") {
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wrapper[f] = function() {
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node.warn(RED._("httpin.errors.deprecated-call",{method:"msg.req."+f}));
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var result = req[f].apply(req,arguments);
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if (result === req) {
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return wrapper;
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} else {
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return result;
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}
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}
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} else {
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wrapper[f] = req[f];
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}
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});
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return wrapper;
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}
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function createResponseWrapper(node,res) {
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var wrapper = {
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_res: res
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};
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var toWrap = [
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"append",
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"attachment",
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"cookie",
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"clearCookie",
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"download",
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"end",
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"format",
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"get",
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"json",
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"jsonp",
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"links",
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"location",
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"redirect",
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"render",
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"send",
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"sendfile",
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"sendFile",
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"sendStatus",
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"set",
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"status",
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"type",
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"vary"
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];
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toWrap.forEach(function(f) {
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wrapper[f] = function() {
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node.warn(RED._("httpin.errors.deprecated-call",{method:"msg.res."+f}));
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var result = res[f].apply(res,arguments);
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if (result === res) {
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return wrapper;
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} else {
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return result;
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}
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}
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});
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return wrapper;
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}
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var corsHandler = function(req,res,next) { next(); }
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if (RED.settings.httpNodeCors) {
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corsHandler = cors(RED.settings.httpNodeCors);
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RED.httpNode.options("*",corsHandler);
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}
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function HTTPIn(n) {
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RED.nodes.createNode(this,n);
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if (RED.settings.httpNodeRoot !== false) {
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if (!n.url) {
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this.warn(RED._("httpin.errors.missing-path"));
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return;
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}
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this.url = n.url;
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if (this.url[0] !== '/') {
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this.url = '/'+this.url;
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}
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this.method = n.method;
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this.upload = n.upload;
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this.swaggerDoc = n.swaggerDoc;
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var node = this;
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this.errorHandler = function(err,req,res,next) {
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node.warn(err);
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res.sendStatus(500);
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};
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this.callback = function(req,res) {
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var msgid = RED.util.generateId();
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res._msgid = msgid;
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// Since Node 15, req.headers are lazily computed and the property
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// marked as non-enumerable.
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// That means it doesn't show up in the Debug sidebar.
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// This redefines the property causing it to be evaluated *and*
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// marked as enumerable again.
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Object.defineProperty(req, 'headers', {
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value: req.headers,
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enumerable: true
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})
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if (node.method.match(/^(post|delete|put|options|patch)$/)) {
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node.send({_msgid:msgid,req:req,res:createResponseWrapper(node,res),payload:req.body});
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} else if (node.method == "get") {
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node.send({_msgid:msgid,req:req,res:createResponseWrapper(node,res),payload:req.query});
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} else {
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node.send({_msgid:msgid,req:req,res:createResponseWrapper(node,res)});
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}
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};
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var httpMiddleware = function(req,res,next) { next(); }
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if (RED.settings.httpNodeMiddleware) {
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if (typeof RED.settings.httpNodeMiddleware === "function" || Array.isArray(RED.settings.httpNodeMiddleware)) {
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httpMiddleware = RED.settings.httpNodeMiddleware;
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}
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}
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var maxApiRequestSize = RED.settings.apiMaxLength || '5mb';
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var jsonParser = bodyParser.json({limit:maxApiRequestSize});
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var urlencParser = bodyParser.urlencoded({limit:maxApiRequestSize,extended:true});
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var metricsHandler = function(req,res,next) { next(); }
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if (this.metric()) {
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metricsHandler = function(req, res, next) {
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var startAt = process.hrtime();
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onHeaders(res, function() {
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if (res._msgid) {
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var diff = process.hrtime(startAt);
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var ms = diff[0] * 1e3 + diff[1] * 1e-6;
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var metricResponseTime = ms.toFixed(3);
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var metricContentLength = res.getHeader("content-length");
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//assuming that _id has been set for res._metrics in HttpOut node!
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node.metric("response.time.millis", {_msgid:res._msgid} , metricResponseTime);
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node.metric("response.content-length.bytes", {_msgid:res._msgid} , metricContentLength);
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}
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});
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next();
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};
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}
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var multipartParser = function(req,res,next) { next(); }
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if (this.upload) {
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var mp = multer({ storage: multer.memoryStorage() }).any();
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multipartParser = function(req,res,next) {
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mp(req,res,function(err) {
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req._body = true;
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next(err);
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})
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};
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}
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if (this.method == "get") {
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RED.httpNode.get(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,this.callback,this.errorHandler);
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} else if (this.method == "post") {
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RED.httpNode.post(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,multipartParser,rawBodyParser,this.callback,this.errorHandler);
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} else if (this.method == "put") {
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RED.httpNode.put(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
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} else if (this.method == "patch") {
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RED.httpNode.patch(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
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} else if (this.method == "delete") {
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RED.httpNode.delete(this.url,cookieParser(),httpMiddleware,corsHandler,metricsHandler,jsonParser,urlencParser,rawBodyParser,this.callback,this.errorHandler);
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}
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this.on("close",function() {
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var node = this;
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RED.httpNode._router.stack.forEach(function(route,i,routes) {
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if (route.route && route.route.path === node.url && route.route.methods[node.method]) {
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routes.splice(i,1);
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}
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});
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});
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} else {
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this.warn(RED._("httpin.errors.not-created"));
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}
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}
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RED.nodes.registerType("http in",HTTPIn);
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function HTTPOut(n) {
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RED.nodes.createNode(this,n);
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var node = this;
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this.headers = n.headers||{};
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this.statusCode = parseInt(n.statusCode);
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this.on("input",function(msg,_send,done) {
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if (msg.res) {
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var headers = RED.util.cloneMessage(node.headers);
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if (msg.headers) {
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if (msg.headers.hasOwnProperty('x-node-red-request-node')) {
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var headerHash = msg.headers['x-node-red-request-node'];
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delete msg.headers['x-node-red-request-node'];
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var hash = hashSum(msg.headers);
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if (hash === headerHash) {
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delete msg.headers;
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}
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}
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if (msg.headers) {
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for (var h in msg.headers) {
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if (msg.headers.hasOwnProperty(h) && !headers.hasOwnProperty(h)) {
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headers[h] = msg.headers[h];
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}
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}
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}
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}
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if (Object.keys(headers).length > 0) {
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msg.res._res.set(headers);
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}
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if (msg.cookies) {
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for (var name in msg.cookies) {
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if (msg.cookies.hasOwnProperty(name)) {
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if (msg.cookies[name] === null || msg.cookies[name].value === null) {
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if (msg.cookies[name]!==null) {
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msg.res._res.clearCookie(name,msg.cookies[name]);
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} else {
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msg.res._res.clearCookie(name);
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}
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} else if (typeof msg.cookies[name] === 'object') {
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msg.res._res.cookie(name,msg.cookies[name].value,msg.cookies[name]);
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} else {
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msg.res._res.cookie(name,msg.cookies[name]);
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}
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}
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}
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}
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var statusCode = node.statusCode || parseInt(msg.statusCode) || 200;
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if (typeof msg.payload == "object" && !Buffer.isBuffer(msg.payload)) {
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msg.res._res.status(statusCode).jsonp(msg.payload);
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} else {
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if (msg.res._res.get('content-length') == null) {
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var len;
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if (msg.payload == null) {
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len = 0;
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} else if (Buffer.isBuffer(msg.payload)) {
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len = msg.payload.length;
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} else if (typeof msg.payload == "number") {
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len = Buffer.byteLength(""+msg.payload);
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} else {
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len = Buffer.byteLength(msg.payload);
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}
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msg.res._res.set('content-length', len);
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}
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if (typeof msg.payload === "number") {
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msg.payload = ""+msg.payload;
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}
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msg.res._res.status(statusCode).send(msg.payload);
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}
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} else {
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node.warn(RED._("httpin.errors.no-response"));
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}
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done();
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});
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}
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RED.nodes.registerType("http response",HTTPOut);
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}
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