17 files changed, 129 insertions, 93 deletions

diff --git a/etc/tool/readme_table.py b/etc/tool/readme_table.py
index 895b515f..b56e4bca 100644
--- a/etc/tool/readme_table.py
+++ b/etc/tool/readme_table.py
@@ -14,6 +14,8 @@ async def test_async(provider: ProviderType):
         return False
     messages = [{"role": "user", "content": "Hello Assistant!"}]
     try:
+        if "webdriver" in provider.get_parameters():
+            return False
         response = await asyncio.wait_for(ChatCompletion.create_async(
             model=models.default,
             messages=messages,
@@ -88,7 +90,7 @@ def print_models():
         "huggingface": "Huggingface",
         "anthropic": "Anthropic",
         "inflection": "Inflection",
-        "meta": "Meta"
+        "meta": "Meta",
     }
     provider_urls = {
         "google": "https://gemini.google.com/",
@@ -96,7 +98,7 @@ def print_models():
         "huggingface": "https://huggingface.co/",
         "anthropic": "https://www.anthropic.com/",
         "inflection": "https://inflection.ai/",
-        "meta": "https://llama.meta.com/"
+        "meta": "https://llama.meta.com/",
     }
 
     lines = [
@@ -108,6 +110,8 @@ def print_models():
             if name not in ("gpt-3.5-turbo", "gpt-4", "gpt-4-turbo"):
                 continue
         name = re.split(r":|/", model.name)[-1]
+        if model.base_provider not in base_provider_names:
+            continue
         base_provider = base_provider_names[model.base_provider]
         if not isinstance(model.best_provider, BaseRetryProvider):
             provider_name = f"g4f.Provider.{model.best_provider.__name__}"
@@ -121,7 +125,24 @@ def print_models():
 
     print("\n".join(lines))
 
+def print_image_models():
+    lines = [
+        "| Label | Provider | Model | Website |",
+        "| ----- | -------- | ----- | ------- |",
+    ]
+    from g4f.gui.server.api import Api
+    for image_model in Api.get_image_models():
+        provider_url = image_model["url"]
+        netloc = urlparse(provider_url).netloc.replace("www.", "")
+        website = f"[{netloc}]({provider_url})"
+        label = image_model["provider"] if image_model["label"] is None else image_model["label"]
+        lines.append(f'| {label} | {image_model["provider"]} | {image_model["image_model"]} | {website} |')
+
+    print("\n".join(lines))
+
 if __name__ == "__main__":
     print_providers()
     print("\n", "-" * 50, "\n")
-    print_models()
\ No newline at end of file
+    print_models()
+    print("\n", "-" * 50, "\n")
+    print_image_models()
\ No newline at end of file
diff --git a/g4f/Provider/BingCreateImages.py b/g4f/Provider/BingCreateImages.py
index f29126b6..60ecff07 100644
--- a/g4f/Provider/BingCreateImages.py
+++ b/g4f/Provider/BingCreateImages.py
@@ -16,6 +16,7 @@ class BingCreateImages(AsyncGeneratorProvider, ProviderModelMixin):
     url = "https://www.bing.com/images/create"
     working = True
     needs_auth = True
+    image_models = ["dall-e"]
 
     def __init__(self, cookies: Cookies = None, proxy: str = None) -> None:
         self.cookies: Cookies = cookies
diff --git a/g4f/Provider/DeepInfraImage.py b/g4f/Provider/DeepInfraImage.py
index ce09533b..8e56e513 100644
--- a/g4f/Provider/DeepInfraImage.py
+++ b/g4f/Provider/DeepInfraImage.py
@@ -11,6 +11,7 @@ class DeepInfraImage(AsyncGeneratorProvider, ProviderModelMixin):
     url = "https://deepinfra.com"
     working = True
     default_model = 'stability-ai/sdxl'
+    image_models = [default_model]
 
     @classmethod
     def get_models(cls):
@@ -18,6 +19,7 @@ class DeepInfraImage(AsyncGeneratorProvider, ProviderModelMixin):
             url = 'https://api.deepinfra.com/models/featured'
             models = requests.get(url).json()
             cls.models = [model['model_name'] for model in models if model["reported_type"] == "text-to-image"]
+            cls.image_models = cls.models
         return cls.models
 
     @classmethod
diff --git a/g4f/Provider/MetaAI.py b/g4f/Provider/MetaAI.py
index fb7790f9..045255e7 100644
--- a/g4f/Provider/MetaAI.py
+++ b/g4f/Provider/MetaAI.py
@@ -13,7 +13,7 @@ from ..requests import raise_for_status, DEFAULT_HEADERS
 from ..image import ImageResponse, ImagePreview
 from ..errors import ResponseError
 from .base_provider import AsyncGeneratorProvider
-from .helper import format_prompt, get_connector
+from .helper import format_prompt, get_connector, format_cookies
 
 class Sources():
     def __init__(self, link_list: List[Dict[str, str]]) -> None:
@@ -48,7 +48,6 @@ class MetaAI(AsyncGeneratorProvider):
 
     async def update_access_token(self, birthday: str = "1999-01-01"):
         url = "https://www.meta.ai/api/graphql/"
-
         payload = {
             "lsd": self.lsd,
             "fb_api_caller_class": "RelayModern",
@@ -90,7 +89,7 @@ class MetaAI(AsyncGeneratorProvider):
             headers = {}
         headers = {
             'content-type': 'application/x-www-form-urlencoded',
-            'cookie': "; ".join([f"{k}={v}" for k, v in cookies.items()]),
+            'cookie': format_cookies(cookies),
             'origin': 'https://www.meta.ai',
             'referer': 'https://www.meta.ai/',
             'x-asbd-id': '129477',
@@ -194,7 +193,7 @@ class MetaAI(AsyncGeneratorProvider):
             **headers
         }
         async with self.session.post(url, headers=headers, cookies=self.cookies, data=payload) as response:
-            await raise_for_status(response)
+            await raise_for_status(response, "Fetch sources failed")
             text = await response.text()
             if "<h1>Something Went Wrong</h1>" in text:
                 raise ResponseError("Response: Something Went Wrong")
diff --git a/g4f/Provider/MetaAIAccount.py b/g4f/Provider/MetaAIAccount.py
index 8be2318e..d334393d 100644
--- a/g4f/Provider/MetaAIAccount.py
+++ b/g4f/Provider/MetaAIAccount.py
@@ -6,6 +6,7 @@ from .MetaAI import MetaAI
 
 class MetaAIAccount(MetaAI):
     needs_auth = True
+    image_models = ["meta"]
 
     @classmethod
     async def create_async_generator(
diff --git a/g4f/Provider/ReplicateImage.py b/g4f/Provider/ReplicateImage.py
index 3e423c1a..5d001604 100644
--- a/g4f/Provider/ReplicateImage.py
+++ b/g4f/Provider/ReplicateImage.py
@@ -17,6 +17,7 @@ class ReplicateImage(AsyncGeneratorProvider, ProviderModelMixin):
         "39ed52f2a78e934b3ba6e2a89f5b1c712de7dfea535525255b1aa35c5565e08b",
         "2b017d9b67edd2ee1401238df49d75da53c523f36e363881e057f5dc3ed3c5b2"
     ]
+    image_models = [default_model]
 
     @classmethod
     async def create_async_generator(
diff --git a/g4f/Provider/You.py b/g4f/Provider/You.py
index e90365ce..61069503 100644
--- a/g4f/Provider/You.py
+++ b/g4f/Provider/You.py
@@ -8,7 +8,7 @@ import uuid
 from ..typing import AsyncResult, Messages, ImageType, Cookies
 from .base_provider import AsyncGeneratorProvider, ProviderModelMixin
 from .helper import format_prompt
-from ..image import ImageResponse, to_bytes, is_accepted_format
+from ..image import ImageResponse, ImagePreview, to_bytes, is_accepted_format
 from ..requests import StreamSession, FormData, raise_for_status
 from .you.har_file import get_telemetry_ids
 from .. import debug
@@ -34,6 +34,7 @@ class You(AsyncGeneratorProvider, ProviderModelMixin):
     model_aliases = {
         "claude-v2": "claude-2"
     }
+    image_models = ["dall-e"]
     _cookies = None
     _cookies_used = 0
     _telemetry_ids = []
@@ -67,7 +68,7 @@ class You(AsyncGeneratorProvider, ProviderModelMixin):
             timeout=(30, timeout)
         ) as session:
             cookies = await cls.get_cookies(session) if chat_mode != "default" else None
-            
+
             upload = json.dumps([await cls.upload_file(session, cookies, to_bytes(image), image_name)]) if image else ""
             headers = {
                 "Accept": "text/event-stream",
@@ -102,11 +103,17 @@ class You(AsyncGeneratorProvider, ProviderModelMixin):
                         if event == "youChatToken" and event in data:
                             yield data[event]
                         elif event == "youChatUpdate" and "t" in data and data["t"] is not None:
-                            match = re.search(r"!\[fig\]\((.+?)\)", data["t"])
-                            if match:
-                                yield ImageResponse(match.group(1), messages[-1]["content"])
+                            if chat_mode == "create":
+                                match = re.search(r"!\[(.+?)\]\((.+?)\)", data["t"])
+                                if match:
+                                    if match.group(1) == "fig":
+                                        yield ImagePreview(match.group(2), messages[-1]["content"])
+                                    else:
+                                        yield ImageResponse(match.group(2), match.group(1))
+                                else:
+                                    yield data["t"]          
                             else:
-                                yield data["t"]                         
+                                yield data["t"]               
 
     @classmethod
     async def upload_file(cls, client: StreamSession, cookies: Cookies, file: bytes, filename: str = None) -> dict:
diff --git a/g4f/Provider/bing/conversation.py b/g4f/Provider/bing/conversation.py
index 4cfeef8e..a4195fa4 100644
--- a/g4f/Provider/bing/conversation.py
+++ b/g4f/Provider/bing/conversation.py
@@ -41,6 +41,8 @@ async def create_conversation(session: StreamSession, headers: dict, tone: str)
             raise RateLimitError("Response 404: Do less requests and reuse conversations")
         await raise_for_status(response, "Failed to create conversation")
         data = await response.json()
+    if not data:
+        raise RuntimeError('Empty response: Failed to create conversation')
     conversationId = data.get('conversationId')
     clientId = data.get('clientId')
     conversationSignature = response.headers.get('X-Sydney-Encryptedconversationsignature')
diff --git a/g4f/Provider/needs_auth/Gemini.py b/g4f/Provider/needs_auth/Gemini.py
index ebf5f413..3917df80 100644
--- a/g4f/Provider/needs_auth/Gemini.py
+++ b/g4f/Provider/needs_auth/Gemini.py
@@ -53,6 +53,7 @@ class Gemini(AsyncGeneratorProvider):
     url = "https://gemini.google.com"
     needs_auth = True
     working = True
+    image_models = ["gemini"]
 
     @classmethod
     async def create_async_generator(
diff --git a/g4f/Provider/needs_auth/OpenaiAccount.py b/g4f/Provider/needs_auth/OpenaiAccount.py
index 7be60c86..6260d343 100644
--- a/g4f/Provider/needs_auth/OpenaiAccount.py
+++ b/g4f/Provider/needs_auth/OpenaiAccount.py
@@ -3,4 +3,5 @@ from __future__ import annotations
 from .OpenaiChat import OpenaiChat
 
 class OpenaiAccount(OpenaiChat):
-    needs_auth = True
\ No newline at end of file
+    needs_auth = True
+    image_models = ["dall-e"]
\ No newline at end of file
diff --git a/g4f/Provider/needs_auth/OpenaiChat.py b/g4f/Provider/needs_auth/OpenaiChat.py
index 36b8bd3c..7952d606 100644
--- a/g4f/Provider/needs_auth/OpenaiChat.py
+++ b/g4f/Provider/needs_auth/OpenaiChat.py
@@ -29,6 +29,7 @@ from ...requests.aiohttp import StreamSession
 from ...image import to_image, to_bytes, ImageResponse, ImageRequest
 from ...errors import MissingAuthError, ResponseError
 from ...providers.conversation import BaseConversation
+from ..helper import format_cookies
 from ..openai.har_file import getArkoseAndAccessToken, NoValidHarFileError
 from ... import debug
 
@@ -44,7 +45,12 @@ class OpenaiChat(AsyncGeneratorProvider, ProviderModelMixin):
     supports_system_message = True
     default_model = None
     models = ["gpt-3.5-turbo", "gpt-4", "gpt-4-gizmo"]
-    model_aliases = {"text-davinci-002-render-sha": "gpt-3.5-turbo", "": "gpt-3.5-turbo", "gpt-4-turbo-preview": "gpt-4"}
+    model_aliases = {
+        "text-davinci-002-render-sha": "gpt-3.5-turbo",
+        "": "gpt-3.5-turbo",
+        "gpt-4-turbo-preview": "gpt-4",
+        "dall-e": "gpt-4",
+    }
     _api_key: str = None
     _headers: dict = None
     _cookies: Cookies = None
@@ -364,8 +370,8 @@ class OpenaiChat(AsyncGeneratorProvider, ProviderModelMixin):
             arkose_token = None
             if cls.default_model is None:
                 try:
-                    arkose_token, api_key, cookies = await getArkoseAndAccessToken(proxy)
-                    cls._create_request_args(cookies)
+                    arkose_token, api_key, cookies, headers = await getArkoseAndAccessToken(proxy)
+                    cls._create_request_args(cookies, headers)
                     cls._set_api_key(api_key)
                 except NoValidHarFileError as e:
                     ...
@@ -393,8 +399,8 @@ class OpenaiChat(AsyncGeneratorProvider, ProviderModelMixin):
                     print(f'Arkose: {need_arkose} Turnstile: {data["turnstile"]["required"]}')
 
             if need_arkose and arkose_token is None:
-                arkose_token, api_key, cookies = await getArkoseAndAccessToken(proxy)
-                cls._create_request_args(cookies)
+                arkose_token, api_key, cookies, headers = await getArkoseAndAccessToken(proxy)
+                cls._create_request_args(cookies, headers)
                 cls._set_api_key(api_key)
                 if arkose_token is None:
                     raise MissingAuthError("No arkose token found in .har file")
@@ -613,7 +619,7 @@ this.fetch = async (url, options) => {
                 cookies[c.name] = c.value
         user_agent = await page.evaluate("window.navigator.userAgent")
         await page.close()
-        cls._create_request_args(cookies, user_agent)
+        cls._create_request_args(cookies, user_agent=user_agent)
         cls._set_api_key(api_key)
 
     @classmethod
@@ -667,16 +673,12 @@ this.fetch = async (url, options) => {
             "oai-language": "en-US",
         }
 
-    @staticmethod
-    def _format_cookies(cookies: Cookies):
-        return "; ".join(f"{k}={v}" for k, v in cookies.items() if k != "access_token")
-
     @classmethod
-    def _create_request_args(cls, cookies: Cookies = None, user_agent: str = None):
-        cls._headers = cls.get_default_headers()
+    def _create_request_args(cls, cookies: Cookies = None, headers: dict = None, user_agent: str = None):
+        cls._headers = cls.get_default_headers() if headers is None else headers
         if user_agent is not None:
             cls._headers["user-agent"] = user_agent
-        cls._cookies = {} if cookies is None else cookies
+        cls._cookies = {} if cookies is None else {k: v for k, v in cookies.items() if k != "access_token"}
         cls._update_cookie_header()
 
     @classmethod
@@ -693,7 +695,7 @@ this.fetch = async (url, options) => {
 
     @classmethod
     def _update_cookie_header(cls):
-        cls._headers["cookie"] = cls._format_cookies(cls._cookies)
+        cls._headers["cookie"] = format_cookies(cls._cookies)
 
 class Conversation(BaseConversation):
     """
diff --git a/g4f/Provider/openai/har_file.py b/g4f/Provider/openai/har_file.py
index 52cd8260..c1b3b9f1 100644
--- a/g4f/Provider/openai/har_file.py
+++ b/g4f/Provider/openai/har_file.py
@@ -59,17 +59,21 @@ def readHAR():
                     except KeyError:
                         continue
                     cookies = {c['name']: c['value'] for c in v['request']['cookies']}
+                    headers = get_headers(v)
     if not accessToken:
         raise NoValidHarFileError("No accessToken found in .har files")
     if not chatArks:
-        return None, accessToken, cookies
-    return chatArks.pop(), accessToken, cookies
+        return None, accessToken, cookies, headers
+    return chatArks.pop(), accessToken, cookies, headers
+
+def get_headers(entry) -> dict:
+    return {h['name'].lower(): h['value'] for h in entry['request']['headers'] if h['name'].lower() not in ['content-length', 'cookie'] and not h['name'].startswith(':')}
 
 def parseHAREntry(entry) -> arkReq:
     tmpArk = arkReq(
         arkURL=entry['request']['url'],
         arkBx="",
-        arkHeader={h['name'].lower(): h['value'] for h in entry['request']['headers'] if h['name'].lower() not in ['content-length', 'cookie'] and not h['name'].startswith(':')},
+        arkHeader=get_headers(entry),
         arkBody={p['name']: unquote(p['value']) for p in entry['request']['postData']['params'] if p['name'] not in ['rnd']},
         arkCookies={c['name']: c['value'] for c in entry['request']['cookies']},
         userAgent=""
@@ -123,11 +127,11 @@ def getN() -> str:
     timestamp = str(int(time.time()))
     return base64.b64encode(timestamp.encode()).decode()
 
-async def getArkoseAndAccessToken(proxy: str):
+async def getArkoseAndAccessToken(proxy: str) -> tuple[str, str, dict, dict]:
     global chatArk, accessToken, cookies
     if chatArk is None or accessToken is None:
-        chatArk, accessToken, cookies = readHAR()
+        chatArk, accessToken, cookies, headers = readHAR()
     if chatArk is None:
-        return None, accessToken, cookies
+        return None, accessToken, cookies, headers
     newReq = genArkReq(chatArk)
-    return await sendRequest(newReq, proxy), accessToken, cookies
+    return await sendRequest(newReq, proxy), accessToken, cookies, headers
diff --git a/g4f/Provider/you/har_file.py b/g4f/Provider/you/har_file.py
index 18a7144b..e58e44d6 100644
--- a/g4f/Provider/you/har_file.py
+++ b/g4f/Provider/you/har_file.py
@@ -4,7 +4,6 @@ import json
 import os
 import os.path
 import random
-import requests
 
 from ...requests import StreamSession, raise_for_status
 from ...errors import MissingRequirementsError
@@ -21,7 +20,8 @@ class arkReq:
         self.arkCookies = arkCookies
         self.userAgent = userAgent
 
-arkPreURL = "https://telemetry.stytch.com/submit"
+telemetry_url = "https://telemetry.stytch.com/submit"
+public_token = "public-token-live-507a52ad-7e69-496b-aee0-1c9863c7c819"
 chatArks: list = None
 
 def readHAR():
@@ -44,7 +44,7 @@ def readHAR():
                 # Error: not a HAR file!
                 continue
             for v in harFile['log']['entries']:
-                if arkPreURL in v['request']['url']:
+                if v['request']['url'] == telemetry_url:
                     chatArks.append(parseHAREntry(v))
     if not chatArks:
         raise NoValidHarFileError("No telemetry in .har files found")
@@ -62,24 +62,29 @@ def parseHAREntry(entry) -> arkReq:
     return tmpArk
 
 async def sendRequest(tmpArk: arkReq, proxy: str = None):
-    async with StreamSession(headers=tmpArk.arkHeaders, cookies=tmpArk.arkCookies, proxies={"all": proxy}) as session:
+    async with StreamSession(headers=tmpArk.arkHeaders, cookies=tmpArk.arkCookies, proxy=proxy) as session:
         async with session.post(tmpArk.arkURL, data=tmpArk.arkBody) as response:
             await raise_for_status(response)
             return await response.text()
 
-async def get_dfp_telemetry_id(proxy: str = None):
+async def create_telemetry_id(proxy: str = None):
     global chatArks
     if chatArks is None:
         chatArks = readHAR()
     return await sendRequest(random.choice(chatArks), proxy)
 
 async def get_telemetry_ids(proxy: str = None) -> list:
+    try:
+        return [await create_telemetry_id(proxy)]
+    except NoValidHarFileError as e:
+        if debug.logging:
+            print(e)
     if debug.logging:
         print('Getting telemetry_id for you.com with nodriver')
     try:
         from nodriver import start
     except ImportError:
-        raise MissingRequirementsError('Install "nodriver" package | pip install -U nodriver')
+        raise MissingRequirementsError('Add .har file from you.com or install "nodriver" package | pip install -U nodriver')
     try:
         browser = await start()
         tab = browser.main_tab
@@ -89,49 +94,11 @@ async def get_telemetry_ids(proxy: str = None) -> list:
             await tab.sleep(1)
 
         async def get_telemetry_id():
-            public_token = "public-token-live-507a52ad-7e69-496b-aee0-1c9863c7c819"
-            telemetry_url = "https://telemetry.stytch.com/submit"
-            return await tab.evaluate(f'this.GetTelemetryID("{public_token}", "{telemetry_url}");', await_promise=True)
-
-        # for _ in range(500):
-        #     with open("hardir/you.com_telemetry_ids.txt", "a") as f:
-        #         f.write((await get_telemetry_id()) + "\n")
+            return await tab.evaluate(
+                f'this.GetTelemetryID("{public_token}", "{telemetry_url}");',
+                await_promise=True
+            )
 
-        return [await get_telemetry_id() for _ in range(4)]
+        return [await get_telemetry_id() for _ in range(1)]
     finally:
-        try:
-            await tab.close()
-        except Exception as e:
-            print(f"Error occurred while closing tab: {str(e)}")
-        try:
-            await browser.stop()
-        except Exception as e:
-            pass
-
-    headers = {
-        'Accept': '*/*',
-        'Accept-Language': 'en,fr-FR;q=0.9,fr;q=0.8,es-ES;q=0.7,es;q=0.6,en-US;q=0.5,am;q=0.4,de;q=0.3',
-        'Connection': 'keep-alive',
-        'Content-type': 'application/x-www-form-urlencoded',
-        'Origin': 'https://you.com',
-        'Referer': 'https://you.com/',
-        'Sec-Fetch-Dest': 'empty',
-        'Sec-Fetch-Mode': 'cors',
-        'Sec-Fetch-Site': 'cross-site',
-        'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36',
-        'sec-ch-ua': '"Google Chrome";v="123", "Not:A-Brand";v="8", "Chromium";v="123"',
-        'sec-ch-ua-mobile': '?0',
-        'sec-ch-ua-platform': '"macOS"',
-    }
-    
-    proxies = {
-            'http': proxy,
-            'https': proxy} if proxy else None
-
-    response = requests.post('https://telemetry.stytch.com/submit', 
-                            headers=headers, data=payload, proxies=proxies)
-
-    if '-' in response.text:
-        print(f'telemetry generated: {response.text}')
-    
-    return (response.text)
+        await browser.stop()
\ No newline at end of file
diff --git a/g4f/gui/server/api.py b/g4f/gui/server/api.py
index 47c25eb7..435700ea 100644
--- a/g4f/gui/server/api.py
+++ b/g4f/gui/server/api.py
@@ -16,7 +16,8 @@ conversations: dict[dict[str, BaseConversation]] = {}
 
 class Api():
 
-    def get_models(self) -> list[str]:
+    @staticmethod
+    def get_models() -> list[str]:
         """
         Return a list of all models.
 
@@ -27,7 +28,8 @@ class Api():
         """
         return models._all_models
 
-    def get_provider_models(self, provider: str) -> list[dict]:
+    @staticmethod
+    def get_provider_models(provider: str) -> list[dict]:
         if provider in __map__:
             provider: ProviderType = __map__[provider]
             if issubclass(provider, ProviderModelMixin):
@@ -40,7 +42,24 @@ class Api():
             else:
                 return [];
 
-    def get_providers(self) -> list[str]:
+    @staticmethod
+    def get_image_models() -> list[dict]:
+        image_models = []
+        for key, provider in __map__.items():
+            if hasattr(provider, "image_models"):
+                if hasattr(provider, "get_models"):
+                    provider.get_models()
+                for model in provider.image_models:
+                    image_models.append({
+                        "provider": key,
+                        "url": provider.url,
+                        "label": provider.label if hasattr(provider, "label") else None,
+                        "image_model": model
+                    })
+        return image_models
+
+    @staticmethod
+    def get_providers() -> list[str]:
         """
         Return a list of all working providers.
         """
@@ -58,7 +77,8 @@ class Api():
             if provider.working
         }
 
-    def get_version(self):
+    @staticmethod
+    def get_version():
         """
         Returns the current and latest version of the application.
 
diff --git a/g4f/gui/server/backend.py b/g4f/gui/server/backend.py
index d30b97d9..d9e31c0e 100644
--- a/g4f/gui/server/backend.py
+++ b/g4f/gui/server/backend.py
@@ -31,6 +31,10 @@ class Backend_Api(Api):
                 'function': self.get_provider_models,
                 'methods': ['GET']
             },
+            '/backend-api/v2/image_models': {
+                'function': self.get_image_models,
+                'methods': ['GET']
+            },
             '/backend-api/v2/providers': {
                 'function': self.get_providers,
                 'methods': ['GET']
diff --git a/g4f/providers/base_provider.py b/g4f/providers/base_provider.py
index 685a6f98..5624c9e1 100644
--- a/g4f/providers/base_provider.py
+++ b/g4f/providers/base_provider.py
@@ -271,13 +271,13 @@ class AsyncGeneratorProvider(AsyncProvider):
         raise NotImplementedError()
 
 class ProviderModelMixin:
-    default_model: str
+    default_model: str = None
     models: list[str] = []
     model_aliases: dict[str, str] = {}
 
     @classmethod
     def get_models(cls) -> list[str]:
-        if not cls.models:
+        if not cls.models and cls.default_model is not None:
             return [cls.default_model]
         return cls.models
 
diff --git a/g4f/providers/helper.py b/g4f/providers/helper.py
index 0ec9aac2..7ebe0d02 100644
--- a/g4f/providers/helper.py
+++ b/g4f/providers/helper.py
@@ -3,7 +3,7 @@ from __future__ import annotations
 import random
 import string
 
-from ..typing import Messages
+from ..typing import Messages, Cookies
 
 def format_prompt(messages: Messages, add_special_tokens=False) -> str:
     """
@@ -56,4 +56,7 @@ def filter_none(**kwargs) -> dict:
         key: value
         for key, value in kwargs.items()
         if value is not None
-    }
\ No newline at end of file
+    }
+
+def format_cookies(cookies: Cookies) -> str:
+    return "; ".join([f"{k}={v}" for k, v in cookies.items()])
\ No newline at end of file