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CORS enabled but response for preflight has invalid HTTP status code 404 when POSTing JSON

Thanks but getting 405 error,after the above config changes. Finally it works after adding below code in web api Global.asax file protected void Application_BeginRequest(Object sender, EventArgs e) { //HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Origin”, “*”); if (HttpContext.Current.Request.HttpMethod == “OPTIONS”) { HttpContext.Current.Response.AddHeader(“Cache-Control”, “no-cache”); HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Methods”, “GET, POST”); HttpContext.Current.Response.AddHeader(“Access-Control-Allow-Headers”, “Content-Type, Accept”); HttpContext.Current.Response.AddHeader(“Access-Control-Max-Age”, “1728000”); HttpContext.Current.Response.End(); } }

Serve a dynamically generated image with Django

I assume you’re using PIL (Python Imaging Library). You need to replace your last line with (for example, if you want to serve a PNG image): response = HttpResponse(mimetype=”image/png”) img.save(response, “PNG”) return response See here for more information.

XMLHttpRequest testing in Jest

The jest api has changed a bit. This is what I use. It doesn’t do anything but it’s enough to render my components. const xhrMockClass = () => ({ open : jest.fn(), send : jest.fn(), setRequestHeader: jest.fn() }) window.XMLHttpRequest = jest.fn().mockImplementation(xhrMockClass) and in the test file: import ‘../../__mock__/xhr-mock.js’

How can you use php in a javascript function [duplicate]

You can’t run PHP code with Javascript. When the user recieves the page, the server will have evaluated and run all PHP code, and taken it out. So for example, this will work: alert( <?php echo “\”Hello\””; ?> ); Because server will have evaluated it to this: alert(“Hello”); However, you can’t perform any operations in … Read more

Python Flask Cors Issue

After I tried others suggestions and answers. Here’s what I use, which works. Steps: pip install flask flask-cors Copy and paste this in app.py file Code from flask import Flask, jsonify from flask_cors import CORS, cross_origin app = Flask(__name__) CORS(app, support_credentials=True) @app.route(“/login”) @cross_origin(supports_credentials=True) def login(): return jsonify({‘success’: ‘ok’}) if __name__ == “__main__”: app.run(host=”0.0.0.0″, port=8000, debug=True) … Read more

Could not initialize proxy – no Session

Your problem is that the hibernate Session lives only for one request. It opens in the start of the request and closes at the end. You guessed the answer: Hibernate session is closed before both requests are finished. Exactly what is happening? Your entity objects live during both requests. How? They are stored in the … Read more

How to Load Ajax in WordPress

As per your request I have put this in an answer for you. As Hieu Nguyen suggested in his answer, you can use the ajaxurl javascript variable to reference the admin-ajax.php file. However this variable is not declared on the frontend. It is simple to declare this on the front end, by putting the following … Read more

How can I change the URI without refreshing the page?

In HTML5 you can change the URL: window.history.pushState(“object or string”, “Title”, “/new-url”); check http://spoiledmilk.com/blog/html5-changing-the-browser-url-without-refreshing-page/ docs: https://developer.mozilla.org/en/DOM/Manipulating_the_browser_history#The_pushState().c2.a0method UPDATE An overview of which browser support the new HTML5 history API: http://caniuse.com/#search=pushState (caniuse.com is worth to bookmark!) there are already frameworks that do the hard work for you and even gracefully fallback to the common hash-tag solution: History.js … Read more

Contact Form 7 AJAX Callback

In version 3.3 new jQuery custom event triggers were introduced: New: Introduce 5 new jQuery custom event triggers wpcf7:invalid wpcf7:spam wpcf7:mailsent wpcf7:mailfailed wpcf7:submit You can use wpcf7:invalid like the example below: $(“.wpcf7”).on(‘wpcf7:invalid’, function(event){ // Your code here });

Reading JSON from SimpleHTTPServer Post data

Thanks matthewatabet for the klein idea. I figured a way to implement it using BaseHTTPHandler. The code below. from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer import SocketServer import simplejson import random class S(BaseHTTPRequestHandler): def _set_headers(self): self.send_response(200) self.send_header(‘Content-type’, ‘text/html’) self.end_headers() def do_GET(self): self._set_headers() f = open(“index.html”, “r”) self.wfile.write(f.read()) def do_HEAD(self): self._set_headers() def do_POST(self): self._set_headers() print “in post method” … Read more