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'''HTTP Methods in Scala''' The '''HTTP protocol''' [[HTTP_protocol|HyperText Transfer Protocol]] is the foundation of any data exchange on the Web and a client-server protocol, which means requests are initiated by the recipient, usually the Web browser. A complete document is reconstructed from the different sub-documents fetched, for instance text, layout description, images, videos, scripts, and more. In the HTTP protocol, different [[HTTP_methods|methods]] are used to perform different actions. When working with [[Main Page | Scala]], a general-purpose programming language, you can use different libraries to work with these HTTP methods. This article discusses these HTTP methods and how you can implement them using Scala. == GET == The [[GET]] method is used to retrieve data from a server. In Scala, you can use the Akka HTTP library to send a GET request. ``` val responseFuture: Future[HttpResponse] = Http().singleRequest(HttpRequest(uri: "http://example.com")) ``` == POST == The [[POST]] method is used to send data to a server. In Scala, you can use the Akka HTTP library to send a POST request. ``` val responseFuture: Future[HttpResponse] = Http().singleRequest(HttpRequest( method = HttpMethods.POST, uri = "http://example.com", entity = HttpEntity(ContentTypes.`text/plain(UTF-8)`, "data") )) ``` == PUT == The [[PUT]] method replaces all current representations of the target resource with the payload. In Scala, you can use the Akka HTTP library to send a PUT request. ``` val request = HttpRequest( method = HttpMethods.PUT, uri = "http://example.com/resource", entity = HttpEntity(ContentTypes.`text/plain(UTF-8)`, "new resource") ) val responseFuture: Future[HttpResponse] = Http().singleRequest(request) ``` == DELETE == The [[DELETE]] method deletes the specified resource. In Scala, you can use the Akka HTTP library to send a DELETE request. ``` val request = HttpRequest( method = HttpMethods.DELETE, uri = "http://example.com/resource" ) val responseFuture: Future[HttpResponse] = Http().singleRequest(request) ``` == HEAD == The [[HEAD]] method asks for a response identical to that of a GET request, but without the response body. ``` val responseFuture: Future[HttpResponse] = Http().singleRequest(HttpRequest( method = HttpMethods.HEAD, uri = "http://example.com" )) ``` == OPTIONS == The [[OPTIONS]] method is used to describe the communication options for the target resource. ``` val request = HttpRequest( method = HttpMethods.OPTIONS, uri = "http://example.com" ) val responseFuture: Future[HttpResponse] = Http().singleRequest(request) ``` == CONNECT == The CONNECT method establishes a network connection for use with a proxy that can dynamically switch between being a tunnel (for example, to facilitate SSL-encrypted HTTPS sessions) and being a straightforward data relay for resources that are not encrypted. It's rarely used in real-life apps. == TRACE == The TRACE method performs a message loop-back test along the path to the target resource, providing a diagnostic tool for viewing the message being sent. Both CONNECT and TRACE methods have security implications and rarely used in typical applications due to those concerns. == Conclusion == In '''Scala''', you can use the Akka HTTP library to work with the HTTP methods. This allows you to build web applications in a functional, type-safe, and concurrent manner. Working with HTTP methods using these libraries gives you greater control over your [[Web_application|web applications]], allowing you to create more efficient, scalable, and robust software solutions. == See Also == * [[Scala_(programming_language)|Scala]] * [[Akka_HTTP]] * [[Web_application]] * [[HTTP_protocol]] * [[GET]] * [[POST]] * [[PUT]] * [[DELETE]] * [[HEAD]] * [[OPTIONS]]
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