what is the use of CORS Handler in WebAPI ?

Khaja Moizuddin

9y1.3k

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

4 Replies

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Sakthivel Ganesan9y ago
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 Moizuddin9y ago
@ 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 Moizuddin9y ago
Any more answers for this question
Sakthivel Ganesan9y ago
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.