总而言之,我使用的是像dicom文件api这样的浏览器,称为基石,为此我连接到dc4chee的WADO服务以获取dicom,dcm4chee运行端口8080,我的节点上的应用程序使用端口3000,所以我是试图显示浏览器的dicom。
https://www.npmjs.com/package/cornerstone-wado-image-loader
这是浏览器显示的错误
XMLHttpRequest can not load http: // localhost: 8080 / wado? RequestType = WADO & studyUID = 1.2.840.113704.1.111.5 ... 26513.429 & contentType = application% 2Fdicom & transferSyntax = 1.2.840.10008.1.2. In 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http: // localhost: 3000' is therefore not allowed access.
在指定的文档中
请注意,Web服务器必须支持跨源资源共享,否则图像将无法加载。如果您无法在Web服务器上启用CORS,而您正在加载DICOM P10实例,则可以使用反向代理。这是一个基于http-proxy的简单Node.js,它添加了你可能会觉得有用的CORS头文件。
并显示此示例代码但我正在使用express并且此代码不起作用
Var http = require ('http'),
HttpProxy = require ('http-proxy');
Var proxy = httpProxy.createProxyServer ({target: 'http: // localhost: 8042'}) .listen (8000);
Proxy.on ('proxyRes', function (proxyReq, req, res, options) {
// add the CORS header to the response
Res.setHeader ('Access-Control-Allow-Origin', '*');
});
Proxy.on ('error', function (e) {
// suppress errors
});
此处还使用npm cors代码
Var express = require ('express')
Var cors = require ('cors')
Var app = express ()
App.get ('/ products /: id', cors (), function (req, res, next) {
Res.json ({msg: 'This is CORS-enabled for a Single Route'))
})
App.listen (80, function () {
Console.log ('CORS-enabled web server listening on port 80')
})
但有了这个,我在端口3000而不是8080上启用了cors,我需要激活模式或在标头响应中添加'Access-Control-Allow-Origin而不是在标头请求中
如何在端口8080上添加CORS,其中dcm4chee从NODEjs运行?
抱歉我的英文
更新!
服务器响应以下内容;
RESPONDE HEADER
Content-Type:application/dicom
Date:Sat, 01 Apr 2017 01:15:38 GMT
Expires:0
Server:Apache-Coyote/1.1
Transfer-Encoding:chunked
X-Powered-By:Servlet 2.4; JBoss-4.2.3.GA (build: SVNTag=JBoss_4_2_3_GA
date=200807181439)/JBossWeb-2.0
请求标题
Accept:*/*
Accept-Encoding:gzip, deflate, sdch, br
Accept-Language:es-ES,es;q=0.8,en-US;q=0.6,en;q=0.4
Connection:keep-alive
Host:localhost:8080
Origin:http: //localhost:3000
Referer:http: //localhost:3000/
User-Agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/55.0.2883.87 Safari/537.36
如何在响应标题中启用COR???
答案 0 :(得分:8)
DO
npm install cors --save
只需在请求所在的主文件中添加这些行。
const cors = require('cors');
const express = require('express');
let app = express();
app.use(cors());
app.options('*', cors());
答案 1 :(得分:4)
要启用cors,您可以执行以下操作:
var cors = require('cors');
app.use(cors());
// to change your ports for different cors stuff:
app.set('port', process.env.PORT || 3000);
app.listen(app.get('port'), function() {
console.log('we are listening on: ',
app.get('port'))
});
请记住,cors是中间件,因此您需要在它之前设置app.use
,这样您的收到的请求才会在它们到达您的路线之前通过cors。
您可以根据要使用的端口更改端口。我很确定你也可以用||
替换&&
来监听多个端口并在那些端口上设置cors。
在raw节点中,我相信你必须使用writeHead,但我不确定原始节点的实现。
答案 2 :(得分:3)
浏览器显示错误,服务器localhost:8080拒绝来自localhost:3000的请求,似乎cors在服务器localhost:8080上没有设置好。
响应头应该是这样的:
Access-Control-Allow-Headers:Content-Type,Content-Length, Authorization, Accept,X-Requested-With
Access-Control-Allow-Methods:PUT,POST,GET,DELETE,OPTIONS
Access-Control-Allow-Origin:*
尝试在8080服务器中添加cors标头。
app.all('*', function (req, res) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With");
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
//...
答案 3 :(得分:3)
要解决此问题,首先您必须了解什么是 Access-Control-Allow-Origin:此 Header 的值将是您将向服务器发送请求的主机(例如快递)。
步骤 1:在服务器端允许 cors,(要允许跨域请求,您可以使用 * 代替 http://localhost:3000:
var express = require("express");
var app = express();
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*"); // update to match the domain you will make the request from
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
next();
});
第 2 步:只需使用您的 http 客户端,我使用的是 Axios:
var qs = require("querystring");
var axios = require("axios");
const sendEmail = (email, subject, template) => {
var data = qs.stringify({
email: email,
subject: subject,
template: template,
});
var config = {
method: "post",
url: "https://abc-domain.com/endpoint",
headers: {
"Content-Type": "application/x-www-form-urlencoded",
},
data: data,
};
axios(config)
.then(function(response) {
console.log(JSON.stringify(response.data));
})
.catch(function(error) {
console.log(error);
});
};
module.exports = sendEmail;
答案 4 :(得分:1)
将 CORS(跨源资源共享)添加到您的节点,快速应用程序很容易......
您首先需要通过 npm 安装 cors 库,使用以下命令:
npm install cors -S
如果您需要全球,只需向其添加-g
标志即可...
然后在快递应用中,执行以下操作:
const express = require('express');
const cors = require('cors');
const app = express();
app.use(cors());
这些也是他们的文档中的其他示例:
var express = require('express')
var cors = require('cors')
var app = express()
app.use(cors())
app.get('/products/:id', function (req, res, next) {
res.json({msg: 'This is CORS-enabled for all origins!'})
})
app.listen(80, function () {
console.log('CORS-enabled web server listening on port 80')
})
异步配置CORS:
var express = require('express')
var cors = require('cors')
var app = express()
var whitelist = ['http://example1.com', 'http://example2.com']
var corsOptionsDelegate = function (req, callback) {
var corsOptions;
if (whitelist.indexOf(req.header('Origin')) !== -1) {
corsOptions = { origin: true } // reflect (enable) the requested origin in the CORS response
}else{
corsOptions = { origin: false } // disable CORS for this request
}
callback(null, corsOptions) // callback expects two parameters: error and options
}
app.get('/products/:id', cors(corsOptionsDelegate), function (req, res, next) {
res.json({msg: 'This is CORS-enabled for a whitelisted domain.'})
})
app.listen(80, function () {
console.log('CORS-enabled web server listening on port 80')
})
答案 5 :(得分:0)
此代码有助于我解决快递的资源问题。而且,您可以在异步原始配置中轻松使用其他选项。
var cors = require('cors'); //import cors module
var whitelist = ['http://localhost:8000', 'http://localhost:8080']; //white list consumers
var corsOptions = {
origin: function (origin, callback) {
if (whitelist.indexOf(origin) !== -1) {
callback(null, true);
} else {
callback(null, false);
}
},
methods: ['GET', 'PUT', 'POST', 'DELETE', 'OPTIONS'],
optionsSuccessStatus: 200, // some legacy browsers (IE11, various SmartTVs) choke on 204
credentials: true, //Credentials are cookies, authorization headers or TLS client certificates.
allowedHeaders: ['Content-Type', 'Authorization', 'X-Requested-With', 'device-remember-token', 'Access-Control-Allow-Origin', 'Origin', 'Accept']
};
app.use(cors(corsOptions)); //adding cors middleware to the express with above configurations
答案 6 :(得分:0)
//Définition des CORS Middleware
app.use(function(req, res, next) {
res.setHeader("Access-Control-Allow-Headers", "X-Requested-With,content-type, Accept,Authorization,Origin");
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader("Access-Control-Allow-Methods", "GET, POST, OPTIONS, PUT, PATCH, DELETE");
res.setHeader("Access-Control-Allow-Credentials", true);
next();
});`enter code here`