Tag:Cross domain

  • . net core uses CORS to solve cross domain requests


    Inject the service into the configureservices function of the startup file public void ConfigureServices(IServiceCollection services) { #Region CORS cross domain request services.AddCors(c => { c.AddPolicy(“AllRequests”, policy => { policy .AllowAnyOrigin() .AllowAnyMethod() .AllowAnyHeader(); }); }); #endregion services.AddControllers(); } Start the middleware in the following configure function public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { if (env.IsDevelopment()) { […]

  • Front end cross domain really easy, mom no longer need to worry


    This paper mainly introduces two cross domain methods, jsonp and CORS. Koa simulation is used in the background. The real goal is to understand the whole cross domain process. As for what is cross domain and browser homology strategy, please Baidu. JSONP Jsonp is actually a kind of trick, which makes use of the browser’s […]

  • Analysis of browser cross domain problem


    The same origin strategy of browser:The agreement is the same、Same domain name、The ports are the same。 All browser vendors follow this strategy. There are three kinds of behavior limitation in non homologous (cross domain) Cookies, localstorage, and indexdb cannot be obtained DOM cannot be obtained Atax request cannot be sent This homology can effectively prevent […]

  • Exception handling of JavaScript


    WhenJavaScriptEngine executionJavaScriptCode, there may be a variety of exceptions, such as syntax exceptions, missing features in the language, and exceptions caused by the exception output from the server or user. andJavascriptThe engine is single threaded, so once an exception is encountered,JavascriptThe engine usually stops execution, blocks subsequent code and throws an exception message. Therefore, we […]

  • Cross domain processing of canvas images


    Introduction In recent work, when dealing with image merging, the cross domain situation of image source is encountered, which is recorded here. Origin My GitHub Image cross domain processing When using canvas to synthesize images, some of the images placed in the canvas are from another domain name. Due to the same origin policy, the […]

  • Solutions to cross domain problems in springboot


    This article mainly introduces the solution of springboot cross domain problem. The example code is introduced in detail, which has certain reference learning value for everyone’s study or work. Friends in need can refer to it If you do not pay attention to the cross domain problem in springboot, it is easy to cause errors. […]

  • Install and configure nginx for Ubuntu


    preface Recently I took over the team’s previous log project. To be frank, I still had no idea at the beginning. I went to the project directly before I understood the tutorial. I was a little worried. But later I found that it was OK. All the things to write were from the tutorial. I […]

  • Cross domain implementation


    Cross domain access testing Co domain testing analysis 1. Browser address:http://manage.jt.com/test.html 2. Browser address:http://manage.jt.com/test.json conclusion When the browser address is the same as the Ajax request address (protocol: / / Domain Name: port), the normal obligation call can be realized Cross domain testing analysis 1. Browser address:http://www.jt.com/test.html 2.2.ajax request address:http://manage.jt.com/test.json conclusion If the request address […]

  • Go language websocket


    Websocket message service   Objective: to build websocket service and exchange messages with browser and service (the first go program written)   Code directory structure:   Front end HTML page: 1 2 3 4 5 6 window.addEventListener(“load”, function(evt) { 7 var output = document.getElementById(“output”); 8 var input = document.getElementById(“input”); 9 var ws; 10 var print […]

  • On the cross domain problem in the separation of front end and back end


    In the development process of separating the front end and the back end, the following error messages often appear: Access to XMLHttpRequest at ‘’ from origin ‘’ has been blocked by CORS policy: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. HelloWorld.vue?18db:50 err Error: Network […]

  • Browser cache cross domain for front end filling


    introduction In a front-end career, it’s inevitable to work with someone calledCross domainWith the guys. thatCross domainWhyCross domainAndCross domainI will not repeat the solution here (if you want to know more about it, please refer to this blog posthttps://blog.csdn.net/qq_3812…)。 What I’m talking about here is a less common oneCross domain, which is the browser’sCache cross […]

  • Building a website environment from scratch (PHP YAF nginx MariaDB) – cross domain


    Cross domain Front end and back-end separation development inevitably involves cross domain issues. Let’s talk about it today. Of course, this is only my personal understanding. If there is any mistake, please correct it Cross domain in development environment Solve cross domain in Vue: Create a new project in the root directory of the front-end […]