iOS Network monitor/interceptor framework written in Swift

by iOS Example

NetShears

NetShears is a Network interceptor framework written in Swift.

NetShears adds a Request interceptor mechanisms to be able to modify the HTTP/HTTPS Request before being sent . This mechanism can be used to implement authentication policies, add headers to a request , add log trace or even redirect requests.

Features

  • [x] Intercept HTTP/HTTPS request header
  • [x] Intercept HTTP/HTTPS request endpoint
  • [x] View traffic logs
  • [ ] Intercept HTTP/HTTPS response body
  • [ ] Block HTTP requets

How it works

NetShears working by swizzling the URLProtocol.

How to use

Start NetShears by calling startRecording() in didFinishLaunchingWithOptions

import NetShears

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {

	NetShears.startRecording()

}

Interceptor

Header Modification:

let header = HeaderModifyModel(key: "API-Version", value: "123")
let headerModifier = RequestEvaluatorModifierHeader(header: header)
NetShears.shared.modify(modifier: headerModifier)

Endpoint Modification:

let endpoint = RedirectedRequestModel(originalUrl: "/register", redirectUrl: "/login")
let endpointModifier = RequestEvaluatorModifierEndpoint(redirectedRequest: endpoint)
NetShears.shared.modify(modifier: endpointModifier)

Traffic Monitoring

In order to show network traffics in your app simply call presentNetworkMonitor method and then a view will present containing traffic logs.

NetShears.shared.presentNetworkMonitor()

gRPC

You can view gRPC calls by constructing the Request and Response from GRPC models:

public func addGRPC(url: String,
                        host: String,
                        requestObject: Data?,
                        responseObject: Data?,
                        success: Bool,
                        statusCode: Int,
                        statusMessage: String?,
                        duration: Double?,
                        HPACKHeadersRequest: [String: String]?,
                        HPACKHeadersResponse: [String: String]?)

Example

// Your GRPC services that is generated from SwiftGRPC
private let client = NoteServiceServiceClient.init(address: "127.0.0.1:12345", secure: false)


func insertNote(note: Note, completion: @escaping(Note?, CallResult?) -> Void) {
    _ = try? client.insert(note, completion: { (createdNote, result) in

        NetShears.shared.addGRPC(url: "https://test.com/grpc",
                         requestObject: try? note.jsonUTF8Data(),
                         responseObject: try? createdNote.jsonUTF8Data(),
                         success: result.success,
                         statusCode: result.statusCode.rawValue,
                         statusMessage: result.statusMessage)
    })
}

Installation

Swift Package Manager

Create a Package.swift file.

// swift-tools-version:5.0

import PackageDescription

let package = Package(
  name: "YourProject",
  dependencies: [
    .package(url: "https://github.com/divar-ir/NetShears.git", from: "1.0.0"),
  ],
  targets: [
    .target(name: "YourProject", dependencies: ["NetShears"])
  ]
)

$ swift build

CocoaPods

# Podfile
use_frameworks!

target 'YOUR_TARGET_NAME' do
    pod 'NetShears'
end

Replace YOUR_TARGET_NAME and then, in the Podfile directory, type:

$ pod install

GitHub

https://github.com/divar-ir/NetShears