WKWebView URL Query & Header Setting

let url = "your URL"
var components = URLComponents(string: url)!
components.queryItems = URLQueryItem(name: "name", value: value.trimmingCharacters(in: .whitespaces))
components.queryItems = [URLQueryItem(name: "name1", value: value.trimmingCharacters(in: .whitespaces)), URLQueryItem(name: "name2", value: value.trimmingCharacters(in: .whitespaces))]
var request = URLRequest(url: components.url!)
request.setValue("value", forHTTPHeaderField: "key")

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URL Query Setting

URLComponents를 사용하지 않은 경우	https://www.address.com/
URLComponents를 사용하고 URLQueryItem을 1개만 설정한 경우	https://www.address.com/?name=value
URLComponents를 사용하고 URLQueryItem을 2개 이상 설정한 경우	https://www.address.com/?name1=value1&name2=value2&...

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URL Header Setting

https://developer.mozilla.org/ko/docs/Web/HTTP/Headers

HTTP 헤더 - HTTP | MDN