问如何在iOS中从PAC文件中获取代理信息

EN

 CFDictionaryRef dicRef = CFNetworkCopySystemProxySettings();
//Manual Proxy Details
const NSString* proxyStr = (const NSString*)CFDictionaryGetValue(dicRef, (const void*)kCFNetworkProxiesHTTPProxy);

//Auto Config Proxy Details
NSString* proxyStr2 = ( NSString*)CFDictionaryGetValue(dicRef, (const void*)kCFNetworkProxiesProxyAutoConfigURLString);
// Return something similar to http://someIPAddress:someport/pacfile

if (proxyStr2 != nil)
{
    NSLog(@"Proxy %@", proxyStr2);
    // Create an url with the proxy pac
    NSURL *url = [NSURL URLWithString:proxyStr2];
    if (url != nil)
    {
        NSString* urlPath = [url path];
        // Url path: /pacfile
        NSLog(@"Url %@", urlPath);
        NSError* error;

        // Go fetch the content the url (PAC Content)
        NSString *content = [NSString stringWithContentsOfURL:url encoding:NSASCIIStringEncoding error:&error];

        if (content == nil)
        {
            NSLog(@"StringWithContentsOfUrl Error: %@", error);
        }

        if (content != nil)
        {
            NSLog(@"PAC content: %@", content);

            // Parsing of the pac file. This is just a sample parsing script and may change based on what your PAC returns
            NSUInteger firstMatch = [content rangeOfString:@"PROXY "].location + 6;
            NSUInteger secondMatch = [content rangeOfString:@"\"" options:0 range:NSMakeRange(firstMatch , [content length] - firstMatch)].location;

            if (firstMatch < 10000 && secondMatch < 10000 && firstMatch > 0 && secondMatch > 0)
            {
               //Just a random label
                self.randLabel3.text=[NSString stringWithFormat: @"First match and second match: %tu %tu", firstMatch, secondMatch];

            }
        }
    }
}