NSURLRequest Create cURL Command

NSURLRequest+cURL.m

@interface NSURLRequest (cURL)
- (NSString *)curlCommand;
@end


@implementation NSURLRequest (cURL)
- (NSString *)curlCommand
{
    NSString *(^stringFromDict)(NSDictionary *dict) = ^NSString*(NSDictionary *dict){
        
        NSMutableString *paramString = [NSMutableString stringWithString:@"{"];
        for (NSString *key in dict) {
            NSString *param = [NSString stringWithFormat:@"\"%@\" : \"%@\", ", key, dict[key]];
            [paramString appendString:param];
        }
        [paramString appendString:@"}"];
        return paramString;
    };
    
    NSMutableString *fullParamString = [NSMutableString stringWithString:@""];
    if (self.HTTPBody) {
        id data = [NSJSONSerialization JSONObjectWithData:self.HTTPBody options:0 error:nil];
        if ([data isKindOfClass:[NSArray class]]) {
            [fullParamString appendString:@"[%@"];
            for (NSDictionary *dict in data) {
                [fullParamString appendString:stringFromDict(dict)];
            }
            [fullParamString appendString:@"]"];
        } else {
            fullParamString =  [stringFromDict(data) mutableCopy];
        }
    }
    NSMutableString *headerString = [NSMutableString string];
    for (NSString *key in [self allHTTPHeaderFields]) {
        [headerString appendFormat:@" -H \"%@: %@\"", key, [self valueForHTTPHeaderField:key]];
    }
    NSString *command = [NSString stringWithFormat:@"curl -X %@ %@ -d '%@' %@", self.HTTPMethod, headerString, fullParamString, [self.URL absoluteString]];
    return command;
}
@end