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Code Quality Rank: L5
Programming language: Swift
License: Apache License 2.0
Tags: Network     Webserver    
Latest version: v0.1.2

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README

Fire Image

Blackfire

An extremely fast Swift web framework

Swift Version SwiftPM compatible License Apache Plaforms

๐Ÿ”ฅ Getting Started

If you're familiar with express.js then Blackfire will be known to you. The most simple example of how to use can be seen below:

main.swift

import Blackfire

// Create a nice new ๐Ÿ”ฅ app for us to play with.
let app = Flame()

// Let's add a route to begin with.
app.get("/") { (req, res) in
  res.send(text: "Hello World")
}

app.start(port: 3000) { result in
  switch result {
    case .success:
      print("Server started on port 3000")
    case .failure(let error):
 ย  ย  ย print("Server failed with error: \(error)")
 ย }
}
$ curl localhost:3000 
Hello World%

๐ŸŽ Features

Blackfire has all the standard features of a typical minimal Web Framework, let's take a look at some of these.

๐Ÿ”ฑ Routing

Routing, as seen in the above example, takes place by assigning a handler to a method in your App

app.get("/") { (req, res) in
  res.send(text: "I'm a GET request")
}
app.post("/users") { (req, res) in
  res.send(text: "I'm a POST request to /users")
}
app.delete("/all/files") { (req, res) in
  res.send(text: "I'm a DELETE request to /all/files ...wait")
}
app.put("/em/up") { (req, res) in
  res.send(text: "I'm a PUT request to /em/up Am I being robbed?")
}

This can become tedious if you have a lot of /users/<something> routes however, so we created the........

๐Ÿ’ Router

Don't be scared that it's a monkey handling it, he had a pretty decent job interview on the whiteboard and seems to be doing ok.

The router object allows you to group routes together. For example

let users = Router()
users.get("/") { req, res in
  res.send(text: "Get me all the users")
}
users.post("/") { req, res in
  res.send(text: "Creating a new user")
}
users.get("/favourites") { req, res in
 ย res.send(json: ["food": "๐ŸŒ"])
}

// Let's use the router to match for /users
app.use("/users", users)

$ curl localhost:3000/users
Get me all the users%
$ curl localhost:3000/users/favourites
{"food":"๐ŸŒ"}%

Powerful stuff.

๐Ÿ“ซ Request

The request or req object contains a bunch of helpful information that your handler may want to use:

These include:

  • request.params A key value pair of Strings that are matched in the route
  • request.body The raw body of the recieved request, in the form of a String
  • request.headers A key value pair of Strings of the headers that appeared in the route
  • request.method The method of this request, formed from the HTTPMethod enum.
  • request.path The path of this request
  • request.httpProtocol The protocol for this request.

๐Ÿ“ฃ Response

The response or res object contains everything you need to return data back to the consumer

  • res.send(text: String) Send back a basic text response in the form of Content-Type: text/plain
  • res.send(json: Any) Send back some JSON, takes in a JSON parseable object. This method can fail if the object is not parseable
  • res.send(status: Int) Send back a HTTP status with no body
  • res.send(html: String) Send back some html with the header of Content-Type: text/html
  • res.send(error: String) Sends back an error, setting the status to 500.
  • res.headers Set some headers to send back to the client

๐Ÿˆ Threading

Threading is a contentious issue when it comes to web frameworks, the age old question of Single vs Multithreaded is enough to start a flame war.

So let's fight the fire with fire and solve it once and for all.

๐Ÿ‘ธ Queue Types

A Flame app can take a type of either .serial or .concurrent. These do exactly as they say on the tin and allow for either all requests to be handled via DispatchQueue.main or DispatchQueue.global().

Why did we do this?

We think that giving you the power to choose which type you want for your app is a good thing. We're not sorry.

Just as an FYI, we chose to go with .serial as the default setting. It was a 50/50 chance we got it right. Good thing it can be changed.

Example

// An app which handles only on the main thread.
let app = Flame(type: .serial)

// An app which handles on multiple concurrent threads.
let app = Flame(type: .concurrent)


*Note that all licence references and agreements mentioned in the Blackfish README section above are relevant to that project's source code only.