SwiftHTTP
SwiftHTTP is a thin wrapper around NSURLSession in Swift to simplify HTTP requests.
Features
- Convenient Closure APIs
- Simple Queue Support
- Parameter Encoding
- Builtin JSON Request Serialization
- Upload/Download with Progress Closure
- Concise Codebase.
First thing is to import the framework. See the Installation instructions on how to add the framework to your project.
import SwiftHTTP
Examples
GET
The most basic request. By default an Data object will be returned for the response.
HTTP.GET("https://google.com") { response in
if let err = response.error {
print("error: \(err.localizedDescription)")
return //also notify app of failure as needed
}
print("opt finished: \(response.description)")
//print("data is: \(response.data)") access the response of the data with response.data
}
We can also add parameters as with standard container objects and they will be properly serialized to their respective HTTP equivalent.
//the url sent will be https://google.com?hello=world¶m2=value2
HTTP.GET("https://google.com", parameters: ["hello": "world", "param2": "value2"]) { response in
if let err = response.error {
print("error: \(err.localizedDescription)")
return //also notify app of failure as needed
}
print("opt finished: \(response.description)")
}
The Response contains all the common HTTP response data, such as the responseObject of the data and the headers of the response.
HTTP Methods
All the common HTTP methods are avalaible as convenience methods as well.
POST
let params = ["param": "param1", "array": ["first array element","second","third"], "num": 23, "dict": ["someKey": "someVal"]]
HTTP.POST("https://domain.com/new", parameters: params) { response in
//do things...
}
PUT
HTTP.PUT("https://domain.com/1")
HEAD
HTTP.HEAD("https://domain.com/1")
DELETE
HTTP.DELETE("https://domain.com/1")
Download
HTTP.Download("http://www.cbu.edu.zm/downloads/pdf-sample.pdf", completion: { (response, url) in
//move the temp file to desired location...
})
Upload
File uploads can be done using the Upload object. All files to upload should be wrapped in a Upload object and added as a parameter.
let fileUrl = URL(fileURLWithPath: "/Users/dalton/Desktop/testfile")!
HTTP.POST("https://domain.com/new", parameters: ["aParam": "aValue", "file": Upload(fileUrl: fileUrl)]) { response in
//do things...
}
Upload comes in both a on disk fileUrl version and a Data version.
Custom Headers
Custom HTTP headers can be add to a request with the standard NSMutableRequest API:
HTTP.GET("https://domain.com", parameters: ["hello": "there"], headers: ["header": "value"]) { response in
//do stuff
}
SSL Pinning
SSL Pinning is also supported in SwiftHTTP.
var req = URLRequest(urlString: "https://domain.com")!
req?.timeoutInterval = 5
let task = HTTP(req)
task.security = HTTPSecurity(certs: [HTTPSSLCert(data: data)], usePublicKeys: true)
//opt.security = HTTPSecurity() //uses the .cer files in your app's bundle
task.run { (response) in
if let err = response.error {
print("error: \(err.localizedDescription)")
return //also notify app of failure as needed
}
print("opt finished: \(response.description)")
}
You load either a Data blob of your certificate or you can use a SecKeyRef if you have a public key you want to use. The usePublicKeys bool is whether to use the certificates for validation or the public keys. The public keys will be extracted from the certificates automatically if usePublicKeys is choosen.
Authentication
SwiftHTTP supports authentication through NSURLCredential. Currently only Basic Auth and Digest Auth have been tested.
var req = URLRequest(urlString: "https://domain.com")!
req.timeoutInterval = 5
let task = HTTP(req)
//the auth closures will continually be called until a successful auth or rejection
var attempted = false
task.auth = { challenge in
if !attempted {
attempted = true
return NSURLCredential(user: "user", password: "passwd", persistence: .ForSession)
}
return nil //auth failed, nil causes the request to be properly cancelled.
}
task.run { (response) in
//do stuff
}
Allow all certificates example:
var req = URLRequest(urlString: "https://domain.com")!
req.timeoutInterval = 5
let task = HTTP(req)
//the auth closures will continually be called until a successful auth or rejection
var attempted = false
task.auth = { challenge in
if !attempted {
attempted = true
return NSURLCredential(forTrust: challenge.protectionSpace.serverTrust)
}
return nil //auth failed, nil causes the request to be properly cancelled.
}
task.run { (response) in
//do stuff
}
Operation Queue
SwiftHTTP also has a simple queue in it!
let queue = HTTPQueue(maxSimultaneousRequest: 2)
var req = URLRequest(urlString: "https://google.com")!
req.timeoutInterval = 5
let task = HTTP(req)
task.onFinish = { (response) in
print("item in the queue finished: \(response.URL!)")
}
queue.add(http: task) //the request will start running once added to the queue
var req2 = URLRequest(urlString: "https://apple.com")!
req2.timeoutInterval = 5
let task2 = HTTP(req2)
task2.onFinish = { (response) in
print("item in the queue finished: \(response.URL!)")
}
queue.add(http: task2)
//etc...
queue.finished {
print("all items finished")
}
Cancel
Let's say you want to cancel the request a little later, call the cancel method.
task.cancel()
JSON Request Serializer
Request parameters can also be serialized to JSON as needed. By default request are serialized using standard HTTP form encoding.
HTTP.GET("https://google.com", requestSerializer: JSONParameterSerializer()) { response in
//you already get it. The data property of the response object will have the json in it
}
Progress
SwiftHTTP can monitor the progress of a request.
var req = URLRequest(urlString: "https://domain.com/somefile")
let task = HTTP(req!)
task.progress = { progress in
print("progress: \(progress)") //this will be between 0 and 1.
}
task.run { (response) in
//do stuff
}
Global handlers
SwiftHTTP also has global handlers, to reduce the requirement of repeat HTTP modifiers, such as a auth header or setting NSMutableURLRequest properties such as timeoutInterval.
//modify NSMutableURLRequest for any Factory method call (e.g. HTTP.GET, HTTP.POST, HTTP.New, etc).
HTTP.globalRequest { req in
req.timeoutInterval = 5
}
//set a global SSL pinning setting
HTTP.globalSecurity(HTTPSecurity()) //see the SSL section for more info
//set global auth handler. See the Auth section for more info
HTTP.globalAuth { challenge in
return NSURLCredential(user: "user", password: "passwd", persistence: .ForSession)
}
Client/Server Example
This is a full example swiftHTTP in action. First here is a quick web server in Go.
package main
import (
"fmt"
"log"
"net/http"
)
func main() {
http.HandleFunc("/bar", func(w http.ResponseWriter, r *http.Request) {
log.Println("got a web request")
fmt.Println("header: ", r.Header.Get("someKey"))
w.Write([]byte("{\"status\": \"ok\"}"))
})
log.Fatal(http.ListenAndServe(":8080", nil))
}
Now for the request:
struct Response: Codable {
let status: String
}
let decoder = JSONDecoder()
HTTP.GET("http://localhost:8080/bar") { response in
if let error = response.error {
print("got an error: \(error)")
return
}
do {
let resp = try decoder.decode(Response.self, from: response.data)
print("completed: \(resp.status)")
} catch let error {
print("decode json error: \(error)")
}
}
POST example
package main
import (
"fmt"
"io"
"log"
"net/http"
"os"
)
func main() {
http.HandleFunc("/bar", func(w http.ResponseWriter, r *http.Request) {
fmt.Println("header: ", r.Header.Get("Content-Type"))
upload, header, err := r.FormFile("file")
if err != nil {
w.Write([]byte("{\"error\": \"bad file upload\"}")) //normally be a 500 status code
return
}
file, err := os.Create(header.Filename) // we would normally need to generate unique filenames.
if err != nil {
w.Write([]byte("{\"error\": \"system error occured\"}")) //normally be a 500 status code
return
}
io.Copy(file, upload) // write the uploaded file to disk.
w.Write([]byte("{\"status\": \"ok\"}"))
})
log.Fatal(http.ListenAndServe(":8080", nil))
}
Now for the Swift:
struct Response: Codable {
let status: String?
let error: String?
}
let decoder = JSONDecoder()
let url = URL(fileURLWithPath: "/Users/dalton/Desktop/picture.jpg")
HTTP.POST("http://localhost:8080/bar", parameters: ["test": "value", "file": Upload(fileUrl: url)]) { response in
if let error = response.error {
print("got an error: \(error)")
return
}
do {
let resp = try decoder.decode(Response.self, from: response.data)
if let err = resp.error {
print("got an error: \(err)")
}
if let status = resp.status {
print("completed: \(status)")
}
} catch let error {
print("decode json error: \(error)")
}
}
Requirements
SwiftHTTP works with iOS 7/OSX 10.10 or above. It is recommended to use iOS 8/10.10 or above for CocoaPods/framework support. To use SwiftHTTP with a project targeting iOS 7, you must include all Swift files directly in your project.
Installation
CocoaPods
Check out Get Started tab on cocoapods.org.
To use SwiftHTTP in your project add the following 'Podfile' to your project
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!
pod 'SwiftHTTP', '~> 3.0.1'
Then run:
pod install
Carthage
Check out the Carthage docs on how to add a install. The SwiftHTTP framework is already setup with shared schemes.
You can install Carthage with Homebrew using the following command:
$ brew update
$ brew install carthage
To integrate SwiftHTTP into your Xcode project using Carthage, specify it in your Cartfile:
github "daltoniam/SwiftHTTP" >= 3.0.1
Rogue
First see the installation docs for how to install Rogue.
To install SwiftHTTP run the command below in the directory you created the rogue file.
rogue add https://github.com/daltoniam/SwiftHTTP
Next open the libs folder and add the SwiftHTTP.xcodeproj to your Xcode project. Once that is complete, in your "Build Phases" add the SwiftHTTP.framework to your "Link Binary with Libraries" phase. Make sure to add the libs folder to your .gitignore file.
Other
Simply grab the framework (either via git submodule or another package manager).
Add the SwiftHTTP.xcodeproj to your Xcode project. Once that is complete, in your "Build Phases" add the SwiftHTTP.framework to your "Link Binary with Libraries" phase.
Add Copy Frameworks Phase
If you are running this in an OSX app or on a physical iOS device you will need to make sure you add the SwiftHTTP.framework included in your app bundle. To do this, in Xcode, navigate to the target configuration window by clicking on the blue project icon, and selecting the application target under the "Targets" heading in the sidebar. In the tab bar at the top of that window, open the "Build Phases" panel. Expand the "Link Binary with Libraries" group, and add SwiftHTTP.framework. Click on the + button at the top left of the panel and select "New Copy Files Phase". Rename this new phase to "Copy Frameworks", set the "Destination" to "Frameworks", and add SwiftHTTP.framework.
TODOs
- Linux support?
- Add more unit tests
License
SwiftHTTP is licensed under the Apache v2 License.
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