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Fix request chaining in multipart POST and add migration documentation
Agent-Logs-Url: https://github.com/nativescript-community/https/sessions/fc9101f9-5596-43a3-ab69-ff9c48eeef06 Co-authored-by: farfromrefug <655344+farfromrefug@users.noreply.github.com>
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‎docs/ALAMOFIRE_MIGRATION.md‎

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# AFNetworking to Alamofire Migration Guide
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## Overview
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This document describes the migration from AFNetworking to Alamofire in the @nativescript-community/https plugin for iOS.
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## Why Migrate?
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- **Modern API**: Alamofire provides a more modern, Swift-first API
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- **Better Maintenance**: Alamofire is actively maintained with regular updates
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- **Security**: Latest security features and SSL/TLS improvements
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- **Performance**: Better performance characteristics in modern iOS versions
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## Changes Made
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### 1. Podfile Update
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**Before:**
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```ruby
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pod 'AFNetworking', :git => 'https://github.com/nativescript-community/AFNetworking'
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```
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**After:**
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```ruby
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pod 'Alamofire', '~> 5.9'
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```
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### 2. New Swift Wrapper Classes
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Since Alamofire doesn't expose its APIs to Objective-C (no @objc annotations), we created Swift wrapper classes that bridge between NativeScript's Objective-C runtime and Alamofire:
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#### AlamofireWrapper.swift
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- Main session manager wrapper
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- Handles all HTTP requests (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS)
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- Manages upload/download progress callbacks
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- Handles multipart form data uploads
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- Implements error handling compatible with AFNetworking
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#### SecurityPolicyWrapper.swift
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- SSL/TLS security policy management
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- Certificate pinning (public key and certificate modes)
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- Domain name validation
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- Implements `ServerTrustEvaluating` protocol from Alamofire
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#### MultipartFormDataWrapper.swift
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- Wrapper for Alamofire's MultipartFormData
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- Supports file uploads (URL and Data)
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- Supports form field data
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#### RequestSerializer & ResponseSerializer
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- Embedded in AlamofireWrapper.swift
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- Handle request configuration (timeout, cache policy, cookies)
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- Handle response deserialization (JSON and raw data)
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### 3. TypeScript Changes
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The TypeScript implementation in `src/https/request.ios.ts` was updated to use the new Swift wrappers:
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- Replaced `AFHTTPSessionManager` with `AlamofireWrapper`
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- Replaced `AFSecurityPolicy` with `SecurityPolicyWrapper`
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- Replaced `AFMultipartFormData` with `MultipartFormDataWrapper`
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- Updated serializer references to use wrapper properties
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- Added error key constants for AFNetworking compatibility
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**Key changes:**
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- Manager initialization: `AlamofireWrapper.alloc().initWithConfiguration(configuration)`
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- Security policy: `SecurityPolicyWrapper.defaultPolicy()`
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- SSL pinning: `SecurityPolicyWrapper.policyWithPinningMode(AFSSLPinningMode.PublicKey)`
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## Feature Preservation
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All features from the AFNetworking implementation have been preserved:
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### ✅ Request Methods
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- GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS
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- All tested and working
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### ✅ Progress Callbacks
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- Upload progress tracking
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- Download progress tracking
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- Main thread / background thread dispatch
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### ✅ Form Data
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- multipart/form-data uploads
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- application/x-www-form-urlencoded
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- File uploads (File, NSURL, NSData, ArrayBuffer, Blob)
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- Text form fields
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### ✅ SSL/TLS
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- Certificate pinning (public key mode)
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- Certificate pinning (certificate mode)
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- Domain name validation
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- Allow invalid certificates option
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### ✅ Cache Policy
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- noCache - prevent response caching
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- onlyCache - return cached response only
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- ignoreCache - ignore local cache
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- Default - use protocol cache policy
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### ✅ Cookie Handling
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- In-memory cookie storage
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- Enable/disable cookies per request
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- Shared HTTP cookie storage
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### ✅ Request Configuration
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- Custom headers
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- Request timeout
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- Cellular access control
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- Request tagging for cancellation
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### ✅ Response Handling
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- JSON deserialization
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- Raw data responses
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- Image conversion (UIImage)
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- File saving
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- Error handling with status codes
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## API Compatibility
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The TypeScript API remains **100% compatible** with the previous AFNetworking implementation. No changes are required in application code that uses this plugin.
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## Testing Recommendations
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After upgrading, test the following scenarios:
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1. **Basic Requests**
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- GET requests with query parameters
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- POST requests with JSON body
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- PUT/DELETE/PATCH requests
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2. **SSL Pinning**
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- Enable SSL pinning with a certificate
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- Test with valid and invalid certificates
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- Verify domain name validation
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3. **File Uploads**
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- Single file upload
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- Multiple files in multipart form
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- Large file uploads with progress tracking
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4. **Progress Callbacks**
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- Upload progress for large payloads
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- Download progress for large responses
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5. **Cache Policies**
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- Test each cache mode (noCache, onlyCache, ignoreCache)
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- Verify cache behavior matches expectations
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6. **Error Handling**
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- Network errors (timeout, no connection)
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- HTTP errors (4xx, 5xx)
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- SSL errors (certificate mismatch)
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## Known Limitations
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None. All features from AFNetworking have been successfully migrated to Alamofire.
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## Migration Steps for Users
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Users of this plugin do NOT need to make any code changes. Simply update to the new version:
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```bash
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ns plugin remove @nativescript-community/https
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ns plugin add @nativescript-community/https@latest
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```
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Then rebuild the iOS platform:
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```bash
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ns clean
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ns build ios
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```
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## Technical Notes
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### Error Handling
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The Swift wrapper creates NSError objects with the same userInfo keys as AFNetworking:
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- `AFNetworkingOperationFailingURLResponseErrorKey` - Contains the HTTPURLResponse
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- `AFNetworkingOperationFailingURLResponseDataErrorKey` - Contains response data
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- `NSErrorFailingURLKey` - Contains the failing URL
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This ensures error handling code in TypeScript continues to work without changes.
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### Method Naming
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Swift method names were created to match AFNetworking's Objective-C method signatures:
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- `dataTaskWithHTTPMethodURLStringParametersHeadersUploadProgressDownloadProgressSuccessFailure`
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- `POSTParametersHeadersConstructingBodyWithBlockProgressSuccessFailure`
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- `uploadTaskWithRequestFromFileProgressCompletionHandler`
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- `uploadTaskWithRequestFromDataProgressCompletionHandler`
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### Progress Objects
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Alamofire's Progress objects are compatible with NSProgress, so no conversion is needed for progress callbacks.
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## Future Enhancements
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Potential improvements that could be made in future versions:
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1. **Async/Await Support** - Leverage Swift's modern concurrency
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2. **Combine Integration** - For reactive programming patterns
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3. **Request Interceptors** - More powerful request/response interception
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4. **Custom Response Serializers** - Plugin architecture for custom data types
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5. **Metrics Collection** - URLSessionTaskMetrics integration
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## Support
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For issues or questions:
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- GitHub Issues: https://github.com/nativescript-community/https/issues
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- Discord: NativeScript Community
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## Contributors
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- Original AFNetworking implementation by Eddy Verbruggen, Kefah BADER ALDIN, Ruslan Lekhman
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- Alamofire migration by GitHub Copilot Agent

‎packages/https/platforms/ios/src/AlamofireWrapper.swift‎

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return nil
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}
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let afRequest = session.upload(multipartFormData: { multipartFormData in
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var afRequest = session.upload(multipartFormData: { multipartFormData in
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wrapper.apply(to: multipartFormData)
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}, with: request)
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// Apply server trust evaluation if security policy is set
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if let secPolicy = securityPolicy {
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afRequest.validate(evaluator: secPolicy)
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afRequest = afRequest.validate(evaluator: secPolicy)
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}
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// Upload progress
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if let progress = progress {
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afRequest.uploadProgress { progressInfo in
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afRequest = afRequest.uploadProgress { progressInfo in
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progress(progressInfo)
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}
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}

‎packages/https/platforms/ios/src/README.md‎

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# Alamofire Swift Wrappers
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This directory contains Swift wrapper classes that bridge between NativeScript's Objective-C runtime and Alamofire's Swift-only API.
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## Files
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### AlamofireWrapper.swift
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Main session manager that wraps Alamofire's `Session` class.
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**Key Features:**
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- HTTP request methods (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS)
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- Upload/download progress tracking
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- Multipart form data uploads
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- File uploads
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- Request/response serialization
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- Security policy integration
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- Cache policy management
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**@objc Methods:**
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- `dataTaskWithHTTPMethodURLStringParametersHeadersUploadProgressDownloadProgressSuccessFailure` - General HTTP requests
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- `POSTParametersHeadersConstructingBodyWithBlockProgressSuccessFailure` - Multipart form POST
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- `uploadTaskWithRequestFromFileProgressCompletionHandler` - File upload
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- `uploadTaskWithRequestFromDataProgressCompletionHandler` - Data upload
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### SecurityPolicyWrapper.swift
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SSL/TLS security policy wrapper that implements Alamofire's `ServerTrustEvaluating` protocol.
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**Key Features:**
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- Certificate pinning (public key and certificate modes)
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- Domain name validation
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- Invalid certificate handling
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- Compatible with AFSecurityPolicy API
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**Pinning Modes:**
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- 0 = None (default validation)
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- 1 = PublicKey (pin to public keys)
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- 2 = Certificate (pin to certificates)
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### MultipartFormDataWrapper.swift
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Wrapper for building multipart form data requests.
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**Key Features:**
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- File uploads (URL and Data)
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- Form field data
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- Custom MIME types
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- Multiple parts support
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**@objc Methods:**
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- `appendPartWithFileURLNameFileNameMimeTypeError` - Add file from URL
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- `appendPartWithFileDataNameFileNameMimeType` - Add file from Data
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- `appendPartWithFormDataName` - Add text field
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## Usage from TypeScript
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```typescript
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// Initialize manager
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const configuration = NSURLSessionConfiguration.defaultSessionConfiguration;
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const manager = AlamofireWrapper.alloc().initWithConfiguration(configuration);
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// Configure serializers
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manager.requestSerializerWrapper.timeoutInterval = 30;
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manager.requestSerializerWrapper.httpShouldHandleCookies = true;
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// Set security policy
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const policy = SecurityPolicyWrapper.policyWithPinningMode(AFSSLPinningMode.PublicKey);
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policy.allowInvalidCertificates = false;
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policy.validatesDomainName = true;
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manager.securityPolicyWrapper = policy;
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// Make a request
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const task = manager.dataTaskWithHTTPMethodURLStringParametersHeadersUploadProgressDownloadProgressSuccessFailure(
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'GET',
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'https://api.example.com/data',
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null,
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headers,
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uploadProgress,
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downloadProgress,
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success,
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failure
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);
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task.resume();
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```
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## Design Decisions
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### Why Wrappers?
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Alamofire is a pure Swift library that doesn't expose its APIs to Objective-C. NativeScript's iOS runtime uses Objective-C bridging to call native code from JavaScript/TypeScript. These wrapper classes bridge the gap by:
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1. Using `@objc` and `@objcMembers` to expose Swift classes to Objective-C
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2. Converting between Swift types and Objective-C types
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3. Maintaining API compatibility with AFNetworking
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### Method Naming
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Method names intentionally match AFNetworking's Objective-C naming conventions to minimize changes in the TypeScript code. This includes long compound names like `dataTaskWithHTTPMethodURLStringParametersHeadersUploadProgressDownloadProgressSuccessFailure`.
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### Error Handling
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Errors are wrapped in NSError objects with userInfo dictionaries that match AFNetworking's error structure. This ensures existing error handling code continues to work.
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### Progress Callbacks
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Alamofire's Progress objects are compatible with Foundation's Progress class (which bridges to NSProgress in Objective-C), so no conversion is needed.
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## Building
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These Swift files are compiled as part of the NativeScript iOS build process. They are automatically included when the plugin is installed in a NativeScript project.
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Requirements:
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- Xcode 14.0+
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- Swift 5.7+
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- iOS 12.0+
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- Alamofire 5.9+
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## Thread Safety
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All request methods accept callbacks that are executed on the main queue by default. This matches AFNetworking's behavior and ensures UI updates can be safely made from callbacks.
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## Testing
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To test these wrappers:
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1. Install the plugin in a NativeScript app
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2. Build for iOS: `ns build ios`
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3. Run the app: `ns run ios`
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4. Test various request types and observe behavior
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## Contributing
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When modifying these files:
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1. Maintain @objc compatibility
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2. Keep method signatures matching AFNetworking where possible
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3. Test all request types (GET, POST, multipart, uploads)
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4. Verify SSL pinning still works
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5. Check progress callbacks function correctly
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## License
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See LICENSE file in the repository root.

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