CORS problems using generated [nodejs-server] code (SWAGGER)
cors, node.js, swagger, swagger-codegen
Solution
add this code above 'Initialize the Swagger middleware', changing the domain to the correct one. The node code comes from jvandemo's answer to same question No 'Access-Control-Allow-Origin' - Node / Apache Port Issue
// Add headers
app.use(function (req, res, next) {
// Website you wish to allow to connect
res.setHeader('Access-Control-Allow-Origin', 'http://server.to.allow.access.from');
// Request methods you wish to allow
res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
// Request headers you wish to allow
res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
// Set to true if you need the website to include cookies in the requests sent
// to the API (e.g. in case you use sessions)
res.setHeader('Access-Control-Allow-Credentials', true);
// Pass to next layer of middleware
next();
});
swagger-codegen wont overwrite an existing index.js
[main] INFO io.swagger.codegen.DefaultCodegen -
Skipped overwriting index.js as the file already exists in
C:\path\to\swagger-codegen\generated\nodejs\index.js
Problem
I generated my server code (`nodejs-server`) based on the swagger specification I have. The problem is that when I try to hit the API from my UI (different domain), I'm getting the well know error that CORS is not enabled: `XMLHttpRequest cannot load http://127.0.0.1:10010/events. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access.` My generated index.js is as follows: ``` 'use strict'; var fs = require('fs'), path = require('path'), http = require('http'); var app = require('connect')(); var swaggerTools = require('swagger-tools'); var jsyaml = require('js-yaml'); var serverPort = 10010; // swaggerRouter configuration var options = { swaggerUi: path.join(__dirname, '/swagger.json'), controllers: path.join(__dirname, './controllers'), useStubs: process.env.NODE_ENV === 'development' // Conditionally turn on stubs (mock mode) }; // The Swagger document (require it, build it programmatically, fetch it from a URL, ...) var spec = fs.readFileSync(path.join(__dirname,'api/swagger.yaml'), 'utf8'); var swaggerDoc = jsyaml.safeLoad(spec); // Initialize the Swagger middleware swaggerTools.initializeMiddleware(swaggerDoc, function (middleware) { // Interpret Swagger resources and attach metadata to request - must be first in swagger-tools middleware chain app.use(middleware.swaggerMetadata()); // Validate Swagger requests app.use(middleware.swaggerValidator()); // Route validated requests to appropriate controller app.use(middleware.swaggerRouter(options)); // Serve the Swagger documents and Swagger UI app.use(middleware.swaggerUi()); // Start the server http.createServer(app).listen(serverPort, function () { console.log('Your server is listening on port %d (http://localhost:%d)', serverPort, serverPort); console.log('Swagger-ui is available on http://localhost:%d/docs', serverPort); }); }); ``` Not sure how I can enable CORS using this generated code.