Atlantis for iOS

1. What's it?
A lightweight and powerful iOS framework for intercepting HTTP/HTTPS and WS/WSS traffic from your iOS app. No more messing around with proxy, certificate config.
iOS Framework for intercepting HTTP/HTTPS traffic
Github: https://github.com/ProxymanApp/atlantis​
2. Benefit?
Automatically intercept all HTTP/HTTPS Traffic with ease.
Automatically intercept WebSocket from iOS devices.
Support iOS Physical Devices and Simulators
No need to config HTTP Proxy, Install or Trust any Certificate
Review traffic logs from Proxyman for macOS app.
Categorize the log by app and devices.
Atlantis is only for Network Inspector. If you would use Debugging Tools like Map Local, Breakpoint, Map Remote, Scripting, Network Throttling, Reverse Proxy ... please consider using a normal Proxy.
3. How to install Atlantis to your iOS Project
CocoaPod
Add the following line to your Podfile and execute pod install
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pod 'atlantis-proxyman'
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Swift Packages Manager
Add https://github.com/ProxymanApp/atlantis to your project by: Open Xcode -> File Menu -> Swift Packages -> Add Package Dependency...
Carthage
1.Add to your Cartfile
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github "ProxymanApp/atlantis"
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1.Run carthage update
2.Drag Atlantis.framework from your project
3.Create a Carthage Script as the Carthage guideline​
For Carthage with Xcode 12, please check out the workaround: https://github.com/Carthage/Carthage/blob/master/Documentation/Xcode12Workaround.md​
4. How to Use?
1.By default, Bonjour service will try to connect all Proxyman app in the same network:
If you have only ONE MacOS machine that has Proxyman. Let use the simple version:
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import Atlantis
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​
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// Add to the end of `application(_:didFinishLaunchingWithOptions:)` in AppDelegate.swift or SceneDelegate.swift
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Atlantis.start()
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If there are many Proxyman apps from colleague's Mac Machines, and you would Atlantis connects to your macOS machine. Let use Atlantis.start(hostName:) version
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import Atlantis
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​
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// Add to the end of `application(_:didFinishLaunchingWithOptions:)` in AppDelegate.swift or SceneDelegate.swift
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Atlantis.start(hostName: "_your_host_name")
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You can get the hostName from Proxyman -> Certificate menu -> Install for iOS -> Atlantis -> How to Start Atlantis -> and copy the HostName
2. Make sure your iOS devices/simulator and macOS Proxyman are in the same Wifi Network or connect your iOS Devices to Mac by USB cables
3. Open macOS Proxyman (or download the lasted here) (2.11.0+)
4. Open your iOS app and Inspect traffic logs from Proxyman app
5. Enjoy debugging ❤️
WS/WSS Traffic
From Atlantis 1.9.0+, Atlantis is capable of capturing all WS/WSS Traffic, which is made byURLSessionWebSocketTask, and send to Proxyman for macOS. You don't need to config anything, it works out of the box.
Requirement
macOS Proxyman app 2.11.0+
iOS 13.0+ / macOS 10.15+
Xcode 11+
Swift 5.0+
Required Configuration for iOS 14+
From iOS 14, it's required to add NSLocalNetworkUsageDescription and NSBonjourServices to your info.plist
Open Info.plist file and add the following keys and values:
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<key>NSLocalNetworkUsageDescription</key>
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<string>Atlantis would use Bonjour Service to discover Proxyman app from your local network.</string>
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<key>NSBonjourServices</key>
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<array>
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    <string>_Proxyman._tcp</string>
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</array>
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Advanced Usage
By default, if your iOS app uses Apple's Networking classes (e.g URLSession or NSURLConnection) or using popular Networking libraries (e.g Alamofire and AFNetworking) to make an HTTP Request, Atlantis will work OUT OF THE BOX.
However, if your app doesn't use any one of them, Atlantis is not able to automatically capture the network traffic.
To resolve it, Atlantis offers certain functions to help you manually* add your Request and Response that will present on the Proxyman app as usual.
1. My app uses C++ Network library and doesn't use URLSession, NSURLSession or any iOS Networking library
You can construct the Request and Response for Atlantis from the following func
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    /// Handy func to manually add Atlantis' Request & Response, then sending to Proxyman for inspecting
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    /// It's useful if your Request & Response are not URLRequest and URLResponse
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    /// - Parameters:
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    ///   - request: Atlantis' request model
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    ///   - response: Atlantis' response model
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    ///   - responseBody: The body data of the response
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    public class func add(request: Request,
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                          response: Response,
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                          responseBody: Data?) {
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Example:
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@IBAction func getManualBtnOnClick(_ sender: Any) {
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  // Init Request and Response
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  let header = Header(key: "X-Data", value: "Atlantis")
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  let jsonType = Header(key: "Content-Type", value: "application/json")
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  let jsonObj: [String: Any] = ["country": "Singapore"]
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  let data = try! JSONSerialization.data(withJSONObject: jsonObj, options: [])
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  let request = Request(url: "https://proxyman.io/get/data", method: "GET", headers: [header, jsonType], body: data)
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  let response = Response(statusCode: 200, headers: [Header(key: "X-Response", value: "Internal Error server"), jsonType])
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  let responseObj: [String: Any] = ["error_response": "Not FOund"]
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  let responseData = try! JSONSerialization.data(withJSONObject: responseObj, options: [])
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​
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  // Add to Atlantis and show it on Proxyman app
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  Atlantis.add(request: request, response: response, responseBody: responseData)
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}
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2. My app use GRPC
You can construct the Request and Response from GRPC models:
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    /// Helper func to convert GRPC message to Atlantis format that could show on Proxyman app as a HTTP Message
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    /// - Parameters:
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    ///   - url: The url of the grpc message to distinguish each message
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    ///   - requestObject: Request Data for the Request, use `try? request.jsonUTF8Data()` for this.
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    ///   - responseObject: Response object for the Response, use `try? response.jsonUTF8Data()` for this.
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    ///   - success: success state. Get from `CallResult.success`
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    ///   - statusCode: statusCode state. Get from `CallResult.statusCode`
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    ///   - statusMessage: statusMessage state. Get from `CallResult.statusMessage`
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    public class func addGRPC(url: String,
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                                 requestObject: Data?,
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                                 responseObject: Data?,
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                                 success: Bool,
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                                 statusCode: Int,
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                                 statusMessage: String?,
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                                 HPACKHeadersRequest: [Header]?,
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                                 HPACKHeadersResponse: [Header]?){
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Example:
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// Your GRPC services that is generated from SwiftGRPC
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private let client = NoteServiceServiceClient.init(address: "127.0.0.1:50051", secure: false)
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​
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// Note is a struct that is generated from a protobuf file
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func insertNote(note: Note, completion: @escaping(Note?, CallResult?) -> Void) {
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    _ = try? client.insert(note, completion: { (createdNote, result) in
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        // Add to atlantis and show it on Proxyman app
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        Atlantis.addGRPC(url: "https://my-server.com/grpc",
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                         requestObject: try? note.jsonUTF8Data(),
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                         responseObject: try? createdNote.jsonUTF8Data(),
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                         success: result.success,
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                         statusCode: result.statusCode.rawValue,
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                         statusMessage: result.statusMessage)
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    })
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}
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FAQ
1. How does Atlantis work?
Atlantis uses Method Swizzling technique to swizzle certain functions of NSURLSession and NSURLConnection that enables Atlantis captures HTTP/HTTPS traffic on the fly.
Then it sends to Proxyman app for inspection later.
2. How can Atlantis stream the data to the Proxyman app?
As soon as your iOS app (Atlantis is enabled) and the Proxyman macOS app are the same local network, Atlantis could discover the Proxyman app by using Bonjour Service. After the connection is established, Atlantis will send the data via Socket.
3. Is it safe to send my network traffic logs to the Proxyman app?
It's completely safe since your data is locally transferred between your iOS app and the Proxyman app, no Internet is required. All traffic logs are captures and send to the Proxyman app for inspecting on the fly.
Atlantis and Proxyman app do not store any of your data on any server.
4. What kind of data that Atlantis capture?
All HTTP/HTTPS traffic from your iOS apps, that integrate the Atlantis framework
Your iOS app name, bundle identifier, and small size of the logo
iOS devices/simulators name and device models.
All the above data are not stored anywhere (except in the memory). It will be wiped out as soon as you close the app.
They are required to categorize the traffic on the Proxyman app by project and device name. Therefore, it's easier to know where the request/response comes from.
Troubleshooting
1. I could not see any request from Atlantis on Proxyman app?
For some reason, Bonjour service might not be able to find Proxyman app.
=> Make sure your iOS devices and the Mac are in the same Wifi Network or connect to your Mac with USB Cabel
=> Please use Atlantis.start(hostName: "_your_host_name") version to explicitly tell Atlantis connects to your Mac.