what is the use of CORS Handler in WebAPI ?

Question

Can anyone explain me in detail the use of CORS Handler in WebAPI?

Sakthivel Ganesan · Answer

Supporting 3rd party callers Enabling CORS and allow any domain to access your Web API public void ConfigureServices(IServiceCollection services) { services.AddCors(); } public void Configure(IApplicationBuilder app) { app.UseCors(cfg => { cfg.AllowAnyHeader() .AllowAnyMethod() .AllowAnyOrigin(); }); } Enabling CORS and allow only XYZ domain to access your Web API public void Configure(IApplicationBuilder app) { app.UseCors(cfg => { cfg.AllowAnyHeader() .AllowAnyMethod() .WithOrigins( http://xyz.com ); }); } Hope I answered your question.

Khaja Moizuddin · Answer

@ sakthivel ganesan  we will be having http://localhost:50782/... Etc. The url when we run  then how can we access from other domain  can you explain me with some basic example.

Khaja Moizuddin · Answer

Any more answers for this question

Sakthivel Ganesan · Answer

CORS stands for Cross Origin Resource Sharing. Normally a Web Api can be accessible only with in the same domain. It cannot be accessed outside domain. If you would like to enable your Web API to accessible by other domains then CORS should be enabled. For example let's say you developed an API and it is deployed on abc.com. So following methods can be accessible only by the applications that are deployed in abc.com domain. It cannot be accessible from either Microsoft.com or Google.com Get Post Put Patch Using CORS you can enable your Get method to be accessible by either Microsoft.com or Google.com.