Header ordering with ja3 and akamai parameter

[omar6995]

• What feature do you find confusing?

I'm trying to use the impersonation with a set of private ja3 / akamai / headers. But I think from my understanding of curl_cffi and curl-impersonate that when using ja3 and akamai parameter the header logic is not used.

I'd like to know how we can set the order of the headers with the ja3/ akamai parameter ( including automatic headers like host)

Edit, i tried the following code but it is not working at all, i'm getting flagged by the site i'm trying to scrape.

CHROME_HEADER_ORDER = [
    'Host',
    'Connection',
    'Content-Length',
    'sec-ch-ua',
    'sec-ch-ua-mobile',
    'sec-ch-ua-platform',
    'Upgrade-Insecure-Requests',
    'User-Agent',
    'Accept',
    'Sec-Fetch-Site',
    'Sec-Fetch-Mode',
    'Sec-Fetch-User',
    'Sec-Fetch-Dest',
    'Accept-Encoding',
    'Accept-Language',
    'Cookie',
    'Referer',
    'Origin',
    'Content-Type',
    'Cache-Control',
    'Pragma'
]

# Safari's standard header order
SAFARI_HEADER_ORDER = [
    'Host',
    'Accept',
    'User-Agent',
    'Accept-Language',
    'Accept-Encoding',
    'Connection',
    'Cookie',
    'Referer',
    'Upgrade-Insecure-Requests',
    'Content-Type',
    'Content-Length',
    'Origin',
    'Cache-Control',
    'Pragma'
]

# Edge's standard header order (based on Chromium but with some differences)
EDGE_HEADER_ORDER = [
    'Host',
    'Connection',
    'Content-Length',
    'sec-ch-ua',
    'sec-ch-ua-mobile',
    'sec-ch-ua-platform',
    'User-Agent',
    'Accept',
    'Accept-Encoding',
    'Accept-Language',
    'Sec-Fetch-Site',
    'Sec-Fetch-Mode',
    'Sec-Fetch-User',
    'Sec-Fetch-Dest',
    'Upgrade-Insecure-Requests',
    'Cookie',
    'Referer',
    'Origin',
    'Content-Type',
    'Cache-Control'
]

def _reorder_headers(self, headers: Dict[str, str], browser_type: str = 'chrome') -> Dict[str, str]:
        """
        Reorder headers according to the specified browser's standard order
        
        Args:
            headers: Dictionary of headers to reorder
            browser_type: Type of browser to use for header ordering ('chrome', 'safari', 'edge')
            
        Returns:
            Dict[str, str]: Reordered headers dictionary
        """
        # Get the header order for the specified browser (default to Chrome if not found)
        header_order = BROWSER_HEADER_ORDERS.get(browser_type.lower(), CHROME_HEADER_ORDER)
        
        # Create a new ordered dictionary for the result
        ordered_headers = {}
        
        # First add headers that exist in our order list
        for header_name in header_order:
            if header_name.lower() in [k.lower() for k in headers.keys()]:
                # Find the actual case-sensitive key from the original headers
                original_key = next(k for k in headers.keys() if k.lower() == header_name.lower())
                ordered_headers[original_key] = headers[original_key]
        
        # Then add any remaining headers that weren't in our order list
        for key, value in headers.items():
            if key not in ordered_headers:
                ordered_headers[key] = value
                
        return ordered_headers

fingerprint = random.choice(browserFingerprints)
headers = fingerprint['headers']
headers['Accept-Language'] = random.choice(accept_languages)
headers['Referer'] = referer
# Determine browser type from User-Agent
browser_type = 'chrome'  # Default to Chrome
ua_lower = current_user_agent.lower()
if 'safari' in ua_lower and 'chrome' not in ua_lower:
browser_type = 'safari'
 elif 'edg/' in ua_lower:
browser_type = 'edge'

headers = self._reorder_headers(headers, browser_type)

ja3 = fingerprint['ja3']
                            
akamai = fingerprint['akamai']
extra_fp = {
 'tls_permute_extensions': fingerprint['support_randomization'],
 'tls_grease': fingerprint['support_randomization']
}
if method == 'GET':
 response = await current_session.get(url,ja3=ja3,akamai=akamai, **kwargs, 
 headers=headers,extra_fp=extra_fp,default_headers=False)
else:
 response = await current_session.post(url,ja3=ja3,akamai=akamai, **kwargs, 
 headers=headers,extra_fp=extra_fp,default_headers=False)

Thanks in advance.

[lexiforest]

Sorry, we do not support custom header ordering at the moment, but it's on our TODO list.