Function to add cors headers

Project.toml

@@ -1,7 +1,7 @@
 name = "Genie"
 uuid = "c43c736e-a2d1-11e8-161f-af95117fbd1e"
 authors = ["Adrian Salceanu <[email protected]> and the amazing Genie contributors ♥️"]
-version = "5.28.0"
+version = "5.29.0"
 
 [deps]
 ArgParse = "c7e460c6-2fb9-53a9-8c5b-16f535851c63"

src/Configuration.jl

@@ -138,6 +138,29 @@ function config!(; kwargs...)
 end
 
 
+"""
+    add_cors_header!(key, value)
+
+Adds a new CORS header to the `Genie.config.cors_headers` collection as key => value pair.
+
+# Examples
+```julia
+Genie.Configuration.add_cors_header!("Access-Control-Allow-Headers", "Genie-Session-Id")
+```
+"""
+function add_cors_header!(key, value; config = Genie.config)
+  key = string(key)
+  value = string(value)
+
+  if ! haskey(config.cors_headers, key)
+    @warn "CORS header key $key does not exist. Creating."
+    config.cors_headers[key] = value
+  end
+
+  config.cors_headers[key] = join(push!([String(strip(h)) for h in split(config.cors_headers[key], ',')], value) |> unique!, ", ")
+end
+
+
 """
     mutable struct Settings