preflight

问题 With my NGinx setup I was able to intercept OPTIONS requests from ajax preflight and respond with the correct CORS headers and a 200 response so the request could continue onwards. I am attempting to consolidate my frontend proxies into HAProxy and am having some issues getting this piece of the puzzle working. My particular issue is that while I am able to add the proper CORS options when there is a server able to respond properly to an OPTIONS request, a few of the backends cannot handle

问题 With my NGinx setup I was able to intercept OPTIONS requests from ajax preflight and respond with the correct CORS headers and a 200 response so the request could continue onwards. I am attempting to consolidate my frontend proxies into HAProxy and am having some issues getting this piece of the puzzle working. My particular issue is that while I am able to add the proper CORS options when there is a server able to respond properly to an OPTIONS request, a few of the backends cannot handle

问题 I have an API protected by basic auth. When I want to make AJAX requests against the API, the browser send an OPTIONS request which doesn't carry the Authorization header so it gets rejected and thus my AJAX call is not allowed by the browser. I tried to configure Tomcat to not authenticate OPTIONS requests but I don't manage to get it work. Someone to help me to get it works? Thanks :) 回答1: I found the solution, I had to specify the list of HTTP methods on which the authentication was

问题 The preflight is not supposed to happen for simple requests as per the documentation: https://developer.mozilla.org/en/docs/Web/HTTP/Access_control_CORS). This is indeed the case if I don't put the additional "Authorization" header in the request: "Content-Type": "application/x-www-form-urlencoded", "Authorization": "Basic _base64_string_" Without "Authorization" header: :authority:www.target.com :method:POST //<----------------This is correct :path:/oauth2/access_token?client_id=xxx-xxx

问题 I am making a web with Angular 5 and I am getting this error every time I try to do a GET request. I've read tons of tons of answers here and none of them working for me. As I've read it's because I am adding custom headers to this request which needs to be done because I am using Spring Security which I think is causing the problem. This is my current Spring Security config which I've made out of reading questions but still not working, I don't know if I am doing something wrong in it:

问题 I am working with an Angular 2 & Ionic 2 app. I had to change to another server for testing and the API has stopped working with the below error message: Response for preflight has invalid HTTP status code 403 I added this to .htaccess <IfModule mod_headers.c> Header append Vary User-Agent env=!dont-vary Header add Access-Control-Allow-Origin "*" Header add Access-Control-Allow-Headers "origin, x-requested-with, content-type" Header add Access-Control-Allow-Methods "PUT, GET, POST, DELETE,

问题 I have a simple GWT application running from IIS on my server. I am trying to test HTTP requests to tomcat running on the same server. However, since both the application servers are running on different ports, my browser (chrome and firefox) treats the requests as a CORS request. To enable tomcat to accept CORS request, I updated it to Tomcat 7.0.52 and enabled the CORS filter in the global web.xml configuration. I tested this simple setup and it seems to work. Here is the code in GWT:

问题 So, I'm using simplexml in php to display elements from an xml file onto a webpage. This is working fine when selecting a whole list child elements in one certain element. The thing is however, I need to select a number of rules in one element, and display the data attached to these certain rules found in another element. To clarify, this a simplified version of my xml file (it contains everything I need): <report> <profile_info> <rules> <rule id="RUL1"> <display_name> XMP does not have

问题 Hello I am using the Ionic 2 framework with Angular and I want to make a http request with the authorization header but it appears it is not sending the header. What have I done wrong? @Injectable() export class UserServiceProvider { private loginSuccess: any; constructor(public http: Http) { console.log('Hello UserServiceProvider Provider'); } login(username, password) { var token = btoa(username + ':' + password); alert(token); this.loginSuccess = false; let headers = new Headers(); headers

问题 As I understand, a pre-flight request is sent by the browser if any of the following conditions is false (source: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#Simple_requests): Request method is GET, HEAD or POST. Custom headers are not set. Content-Type header value is either application/x-www-form-urlencoded , multipart/form-data or text/plain . I have a web app which sends a GET request to a server on a different origin. Since I have to send cookies to the server, the property