cors | 易学教程

How to get headers of the response from fetch

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问题 I am using fetch on chrome Version 52.0.2743.82 (64-bit). I want to get all the headers in the response. Following snippet only return content-type but if you peek into chrome dev tools it shows many other response headers. How to get other headers from fetch. fetch('https://httpbin.org/get') .then(response => { const headers = response.headers.entries(); let header = headers.next(); while (!header.done){ console.log(headers.value); header = header.next(); } }) I tried polyfilling(manually

AJAX安全

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AJAX 三问 ajax请求真的不安全吗，为什么后端总是让使用普通HTTP请求？ ajax请求哪里不安全? 怎样让ajax请求更安全？目录常见的web前端安全问题 CSRF简介 CSRF和ajax的关系 XSS简介 XSS和ajax关系 SQL注入 SQL和ajax关系 ajax和HTTP区别 cors 和ajax安全性之间的关系首先解决问题：ajax真的不安全吗？哪里不安全？如何更安全？在Web应用中，客户端输入不可信是一个基本原则。如果某个Web应用具备良好的安全性，那么再怎么用“不安全的AJAX”也削弱不了它的安全性，反之如果应用本身存在漏洞，不管用何种技术请求，它都是不安全的。 web常见安全问题： 1.XSS（跨站脚本攻击） -> 伪造会话（基于XSS实现CSRF） ->劫持cookie ->恶意代码执行 2.CSRF（跨站请求伪造） ->伪造用户身份操作 3.SQL注入 CSRF简介 CSRF 冒用用户身份，进行恶意操作采用cookie来进行用户校验登录受信任网站A，并在本地生成Cookie 在不登出A的情况下，访问危险网站B 如下图：一般在(4)处恶意网站(B)的攻击手段如下（必须是指向A的地址，否则无法带上cookie）： // 1.譬如在网站内的图片资源中潜入恶意的转账操作 <img src=http://www.bank.example

browsers send Options instead of Post after changing http header

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问题 /*set the response header*/ Form responseHeaders = (Form) getResponse().getAttributes().get("org.restlet.http.headers"); if (responseHeaders == null) { responseHeaders = new Form(); responseHeaders.add("Access-Control-Allow-Origin", "*"); responseHeaders.add("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE"); getResponse().getAttributes().put("org.restlet.http.headers", responseHeaders); } I added this in my restlet 2.0 code to allow for cross domain access, this does make the first

HttpClient - Angular4 - No 'Access-Control-Allow-Origin' header is present on the requested resource

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问题 The error I am getting seems to be a CORS issue. I am trying to make a POST request to my RESTful API through HttpClient as follows: import {Component, OnInit} from '@angular/core'; import {Observable} from "rxjs/Observable"; import {HttpClient, HttpParams, HttpHeaders} from "@angular/common/http"; import { Test } from './test'; import { TestResponse } from './test.response'; import 'rxjs/add/operator/map'; import 'rxjs/add/operator/do'; import * as _ from 'lodash'; @Component({ selector: 'my

Enabling CORS (Cross Origin Request) in Django

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问题 I'm trying to make use of the overpass API http://wiki.openstreetmap.org/wiki/Overpass_API with a JavaScript XMLHttpRequest in a project running on Django but I keep getting the Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://www.google.com/accounts/ClientLogin. (Reason: CORS header 'Access-Control-Allow-Origin' missing). error. I get this error whether I'm using GET or POST, and from any other host, not just the overpass API. I've

Render JSON with header

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问题 I want to render JSON with the following cors header in my controller: 'Access-Control-Allow-Origin' = '*'. I tried this: def my_action render(json: some_params) response.headers['Access-Control-Allow-Origin'] = '*' end but I got an AbstractController::DoubleRenderError . Are there ways to render JSON with headers? 回答1: You can't set a header after render, because the response is sent. So change the headers after makes no sense and you get this error. Try: def my_action response.headers[

Why is there no preflight in CORS for POST requests with standard content-type

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问题 I'm a bit confused about the security aspects of CORS POST requests. I know there is a lost of information about this topic online, but I couldn't find a definite answer to my questions. If I understood it correctly, the goal of the same-origin policy is to prevent CSRF attacks and the goal of CORS is to enable resource sharing if (and only if) the server agrees to share its data with applications hosted on other sites (origins). HTTP specifies that POST requests are not 'safe', i.e. they

Cordova doesn't send origin on request in some Android devices

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问题 This is a problem that happens on some android devices. I have a Samsung Galaxy A5 (2017) with Google Chrome version 76.0.3809.89 and Android version 8.0.0. When I deploy my Cordova application for the first time on this device and making a POST request I receive an error about CORS: Access to XMLHttpRequest at 'http://foo.com/bar' from origin 'file://' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is

Cordova doesn't send origin on request in some Android devices

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add multiple cross origin urls in spring boot

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问题 I found an example on how to set cors headers in spring-boot application. Since we have many origins, I need to add them. Is the following valid? @Configuration @EnableWebMvc public class WebConfig extends WebMvcConfigurerAdapter { @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/api/**") .allowedOrigins("http://domain1.com") .allowedOrigins("http://domain2.com") .allowedOrigins("http://domain3.com") } } I have no way to test this unless it is used by three