Using Smart Proxy Manager with Objective-C

Warning

zyte-smartproxy-ca.crt should be installed in your OS for the below code to work. You can follow these instructions in order to install it.

Note

All the code in this documentation has been tested with Xcode 13.1.

1. In order to work with Objective-C make sure you have Xcode installed.

2. Make sure that you follow Fetching HTTPS pages with Zyte Smart Proxy Manager to install proper certificate in order to request pages with https.

3. Create a new macOS Project and select Application > Command Line Tool.

4. Copy entire Sample Code given below and paste in main.m.

5. Replace <SPM-APIKEY> with Zyte Smart Proxy Manager API Key.

6. Press Command + R to run the program or Select Product > Run from the Menu bar.

7. The output can be found on Console. Active Console by pressing Shift + Command + C or by Selecting View > Debug Area > Activate Console from the Menu bar.

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    // Replace <SPM-APIKEY> with Zyte Smart Proxy Manager API Key
    NSString *username = @"<SPM-APIKEY>";
    NSString *password = @"";
    NSString *authString = [NSString stringWithFormat:@"%@:%@",
                            username,
                            password];

    // Convert authString to an NSData instance
    NSData *authData = [authString dataUsingEncoding:NSUTF8StringEncoding];

    // Build the header string with base64 encoded data
    NSString *authHeader = [NSString stringWithFormat: @"Basic %@",
                            [authData base64EncodedStringWithOptions:0]];

    // Building session configuration with proxy information
    NSString* proxyHost = @"proxy.zyte.com";
    NSNumber* proxyPort = [NSNumber numberWithInt: 8011];
    NSDictionary *proxyDict = @{
        @"HTTPEnable"  : [NSNumber numberWithInt:1],
        (NSString *)kCFNetworkProxiesHTTPProxy  : proxyHost,
        (NSString *)kCFNetworkProxiesHTTPPort  : proxyPort,

        @"HTTPSEnable" : [NSNumber numberWithInt:1],
        (NSString *)kCFNetworkProxiesHTTPSProxy : proxyHost,
        (NSString *)kCFNetworkProxiesHTTPSPort : proxyPort,
    };
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration ephemeralSessionConfiguration];
    configuration.connectionProxyDictionary = proxyDict;
    [configuration setHTTPAdditionalHeaders:@{@"Proxy-Authorization": authHeader}];

    // Create a NSURLSession with the proxy-aware configuration
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];

    // Setting URL to request
    NSURL *url = [NSURL URLWithString:@"https://toscrape.com"];

    // Dispatch the request on the custom configured session
    NSURLSessionDataTask *dataTask = [session dataTaskWithURL: url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                NSLog(@"Response: %@",response);
                NSLog(@"Data: %@",data);
                NSLog(@"Error: %@",error);
                CFRunLoopStop(CFRunLoopGetCurrent());
                exit(EXIT_SUCCESS);
            }];
            [dataTask resume];

    CFRunLoopRun();
    return 0;
}