be-ytb/js/main.swift

import JavaScriptCore
import Alamofire

func createJSContext() -> JSContext {
    let ctx = JSContext()
    
    // 注入 console.log
    ctx?.evaluateScript("var console = { log: function(message) { _consoleLog(message) } }")
    let consoleLog: @convention(block) (String) -> Void = { message in
        print("JavaScript Console.log: " + message)
    }
    ctx?.setObject(unsafeBitCast(consoleLog, to: AnyObject.self), forKeyedSubscript: "_consoleLog" as (NSCopying & NSObjectProtocol)?)
    
    // 注入AF
    ctx?.evaluateScript("var af = { request: function(url, method, data, headers, callback) { _request(url, method, data, headers, callback) } }")
    let af: @convention(block) (String, String, String?, [String: String]?, JSValue?) -> Void = { url, method, data, headers, callback in
        var request = URLRequest(url: URL(string: url)!)
        request.httpMethod = method
        
        if let data = data {
            request.setValue("application/json", forHTTPHeaderField: "Content-Type")
            request.httpBody = data.data(using: .utf8)
        }
        
        if let headers = headers {
            request.headers = HTTPHeaders(headers)
        }
        
        AF.request(request).response { response in
            if let data = response.data {
                let responseString = String(data: data, encoding: .utf8)
                callback?.call(withArguments: [responseString, nil])
            }
            if let error = response.error {
                callback?.call(withArguments: [nil, error.localizedDescription])
            }
        }
    }
    ctx?.setObject(unsafeBitCast(af, to: AnyObject.self), forKeyedSubscript: "_request" as (NSCopying & NSObjectProtocol)?)
    
    // 捕捉JS运行异常
    ctx?.exceptionHandler = { context, exception in
        if let exception = exception {
            print("JavaScript Exception: \(exception)")
        }
    }
    
    return ctx!
}

let ctx = createJSContext()


// 在 JavaScript 脚本中使用 Alamofire
let script = """
    AF.request("GET", "http://api.mywidgetsnow.com/health",, null, null, function(result) {
        console.log(result);
    });
"""

// 执行 JavaScript 脚本
ctx.evaluateScript(script)

RunLoop.main.run()