如何以编程方式将代理添加到 NSURLSession

Question

查看 NSURLSession 和 NSURLSessionConfiguration 的文档，我的印象是我应该使用如下字典配置它：

    // Create a dictionary to describe the proxy 
    NSDictionary *proxyDict = @{
        (NSString *)kCFProxyHostNameKey   : @"myProxyHost.com",
        (NSString *)kCFProxyPortNumberKey : @"12345",
        (NSString *)kCFProxyTypeKey       : (NSString*)kCFProxyTypeHTTP
    };

    // Create a configuration that uses the dictionary
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    [configuration setConnectionProxyDictionary:proxyDict];

但是，使用此配置创建的 NSURLSession 的请求直接连接。

Answer 1

事实证明，你想要的字典键是 Stream 变体，它们是解析为 "HTTPProxy" 的那些：

NSString* proxyHost = @"myProxyHost.com";
NSNumber* proxyPort = [NSNumber numberWithInt: 12345];

// Create an NSURLSessionConfiguration that uses the proxy
NSDictionary *proxyDict = @{
    @"HTTPEnable"  : [NSNumber numberWithInt:1],
    (NSString *)kCFStreamPropertyHTTPProxyHost  : proxyHost,
    (NSString *)kCFStreamPropertyHTTPProxyPort  : proxyPort,

    @"HTTPSEnable" : [NSNumber numberWithInt:1],
    (NSString *)kCFStreamPropertyHTTPSProxyHost : proxyHost,
    (NSString *)kCFStreamPropertyHTTPSProxyPort : proxyPort,
};

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration ephemeralSessionConfiguration];
configuration.connectionProxyDictionary = proxyDict;

// Create a NSURLSession with our proxy aware configuration
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:[NSOperationQueue mainQueue]];

// Form the request
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.google.com?2"]];

// Dispatch the request on our custom configured session
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:
                              ^(NSData *data, NSURLResponse *response, NSError *error) {
                                  NSLog(@"NSURLSession got the response [%@]", response);
                                  NSLog(@"NSURLSession got the data [%@]", data);
                              }];

NSLog(@"Lets fire up the task!");
[task resume];

Answer 2

由于 Jeff 的几个答案已被弃用，我使用这个

NSMutableDictionary *proxy=[NSMutableDictionary dictionaryWithDictionary:@{(__bridge NSString *)kCFNetworkProxiesHTTPEnable  : @1,  (__bridge NSString *)kCFNetworkProxiesHTTPSEnable : @1}];
proxy[(__bridge NSString *)kCFNetworkProxiesHTTPProxy] =host;
proxy[(__bridge NSString *)kCFNetworkProxiesHTTPSProxy]=host;
proxy[(__bridge NSString *)kCFNetworkProxiesHTTPPort]  =port;
proxy[(__bridge NSString *)kCFNetworkProxiesHTTPSPort] =port;
proxy[(__bridge NSString *)kCFProxyUsernameKey]=user;
proxy[(__bridge NSString *)kCFProxyPasswordKey]=password;

configuration.connectionProxyDictionary=proxy;

Answer 3

如果有人需要这个的 swift 版本：

Swift 3

let sessionConfiguration = URLSessionConfiguration.default
sessionConfiguration.connectionProxyDictionary = [
    kCFNetworkProxiesHTTPEnable as AnyHashable: true,
    kCFNetworkProxiesHTTPPort as AnyHashable: 999, //myPortInt
    kCFNetworkProxiesHTTPProxy as AnyHashable: "myProxyUrlString"
]
let session = URLSession(configuration: sessionConfiguration)

Answer 4

kCFProxyPortNumberKey 值应该是 Int 而不是 String

Answer 5

Swift 3 分机

extension URLSession {

    func withProxy(proxyURL: String, proxyPort: Int) -> URLSession {

        var configuration = self.configuration

        configuration.connectionProxyDictionary = [
            kCFNetworkProxiesHTTPEnable as AnyHashable : true,
            kCFNetworkProxiesHTTPPort as AnyHashable : proxyPort,
            kCFNetworkProxiesHTTPProxy as AnyHashable : proxyURL
        ]

        return URLSession(configuration: configuration, delegate: self.delegate, delegateQueue: self.delegateQueue)
    }
}

用法：

let session = URLSession().withProxy(proxyURL: "xxxxxx", proxyPort: 8321)

Answer 6

根据之前的所有回复，这适用于 Swift 4，HTTP 和 HTTPS：

let proxyHost = "127.0.0.1"
let proxyPort = 8888
let configuration = URLSessionConfiguration.default
configuration.connectionProxyDictionary = [
    kCFNetworkProxiesHTTPEnable: true,
    kCFNetworkProxiesHTTPProxy: proxyHost,
    kCFNetworkProxiesHTTPPort: proxyPort,
    kCFNetworkProxiesHTTPSEnable: true,
    kCFNetworkProxiesHTTPSProxy: proxyHost,
    kCFNetworkProxiesHTTPSPort: proxyPort
]

proxyHost 应该是主机名并且不包含任何 URL 方案。

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