ipinfo.m

# build "clang -framework Foundation ipinfo.m -o ipinfo" remove this line after pasting
#import <Foundation/Foundation.h>

static NSDictionary* fetchIPInfo(void) {
    NSURL *url = [NSURL URLWithString:@"https://ipinfo.io/json"];
    NSData *data = [NSData dataWithContentsOfURL:url];
    if (!data) {
        NSLog(@"Failed to fetch data");
        return nil;
    }
    NSError *error = nil;
    id jsonObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
    if (error || ![jsonObject isKindOfClass:[NSDictionary class]]) {
        NSLog(@"JSON parsing error: %@", error);
        return nil;
    }
    return (NSDictionary *)jsonObject;
}

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSDictionary *json = fetchIPInfo();
        if (!json) {
            return 1;
        }

        // Parse args fields (skip argv[0])
        NSMutableArray<NSString*> *fields = [NSMutableArray array];
        for (int i = 1; i < argc; i++) {
            NSString *arg = [NSString stringWithUTF8String:argv[i]];
            if ([arg hasPrefix:@"--"]) {
                NSString *field = [arg substringFromIndex:2];
                if (field.length > 0) {
                    [fields addObject:field];
                }
            }
        }

        if (fields.count == 0) {
            // No args, print full JSON pretty
            NSError *encodingError = nil;
            NSData *jsonData = [NSJSONSerialization dataWithJSONObject:json options:NSJSONWritingPrettyPrinted error:&encodingError];
            if (!jsonData) {
                NSLog(@"JSON encode error: %@", encodingError);
                return 1;
            }
            NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
            printf("%s\n", [jsonString UTF8String]);
        } else if (fields.count == 1) {
            // Single field: print the value as string if exists
            id value = json[fields[0]];
            if ([value isKindOfClass:[NSString class]]) {
                printf("%s\n", [((NSString *)value) UTF8String]);
            } else {
                NSLog(@"Field '%@' not found or not a string", fields[0]);
                return 1;
            }
        } else {
            // Multiple fields: build dictionary with those fields
            NSMutableDictionary *result = [NSMutableDictionary dictionary];
            for (NSString *key in fields) {
                id val = json[key];
                if (val) {
                    result[key] = val;
                }
            }
            NSError *encodingError = nil;
            NSData *jsonData = [NSJSONSerialization dataWithJSONObject:result options:NSJSONWritingPrettyPrinted error:&encodingError];
            if (!jsonData) {
                NSLog(@"JSON encode error: %@", encodingError);
                return 1;
            }
            NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
            printf("%s\n", [jsonString UTF8String]);
        }
    }
    return 0;
}