1 files changed, 172 insertions, 0 deletions

diff --git a/g4f/Provider/Myshell.py b/g4f/Provider/Myshell.py
new file mode 100644
index 00000000..0ddd3029
--- /dev/null
+++ b/g4f/Provider/Myshell.py
@@ -0,0 +1,172 @@
+from __future__ import annotations
+
+import json, uuid, hashlib, time, random
+
+from aiohttp import ClientSession
+from aiohttp.http import WSMsgType
+import asyncio
+
+from ..typing import AsyncGenerator
+from .base_provider import AsyncGeneratorProvider, format_prompt
+
+
+models = {
+    "samantha": "1e3be7fe89e94a809408b1154a2ee3e1",
+    "gpt-3.5-turbo": "8077335db7cd47e29f7de486612cc7fd",
+    "gpt-4": "01c8de4fbfc548df903712b0922a4e01",
+}
+
+
+class Myshell(AsyncGeneratorProvider):
+    url = "https://app.myshell.ai/chat"
+    working               = True
+    supports_gpt_35_turbo = True
+    supports_gpt_4        = True
+
+    @classmethod
+    async def create_async_generator(
+        cls,
+        model: str,
+        messages: list[dict[str, str]],
+        **kwargs
+    ) -> AsyncGenerator:
+        if not model:
+            bot_id = models["samantha"]
+        elif model in models:
+            bot_id = models[model]
+        else:
+            raise ValueError(f"Model are not supported: {model}")
+        
+        user_agent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36'
+        visitor_id = generate_visitor_id(user_agent)
+
+        async with ClientSession(
+            headers={'User-Agent': user_agent}
+        ) as session:
+            async with session.ws_connect(
+                "wss://api.myshell.ai/ws/?EIO=4&transport=websocket",
+                autoping=False,
+                timeout=90
+            ) as wss:
+                # Send and receive hello message
+                await wss.receive_str()
+                message = json.dumps({"token": None, "visitorId": visitor_id})
+                await wss.send_str(f"40/chat,{message}")
+                await wss.receive_str()
+
+                # Fix "need_verify_captcha" issue
+                await asyncio.sleep(5)
+
+                # Create chat message
+                text = format_prompt(messages)
+                chat_data = json.dumps(["text_chat",{
+                    "reqId": str(uuid.uuid4()),
+                    "botUid": bot_id,
+                    "sourceFrom": "myshellWebsite",
+                    "text": text,
+                    **generate_signature(text)
+                }])
+
+                # Send chat message
+                chat_start = "42/chat,"
+                chat_message = f"{chat_start}{chat_data}"
+                await wss.send_str(chat_message)
+
+                # Receive messages
+                async for message in wss:
+                    if message.type != WSMsgType.TEXT:
+                        continue
+                    # Ping back
+                    if message.data == "2":
+                        await wss.send_str("3")
+                        continue
+                    # Is not chat message
+                    if not message.data.startswith(chat_start):
+                        continue
+                    data_type, data = json.loads(message.data[len(chat_start):])
+                    if data_type == "text_stream":
+                        if data["data"]["text"]:
+                            yield data["data"]["text"]
+                        elif data["data"]["isFinal"]:
+                            break
+                    elif data_type in ("message_replied", "need_verify_captcha"):
+                        raise RuntimeError(f"Received unexpected message: {data_type}")
+
+
+    @classmethod
+    @property
+    def params(cls):
+        params = [
+            ("model", "str"),
+            ("messages", "list[dict[str, str]]"),
+            ("stream", "bool"),
+        ]
+        param = ", ".join([": ".join(p) for p in params])
+        return f"g4f.provider.{cls.__name__} supports: ({param})"
+
+
+def generate_timestamp() -> str:
+    return str(
+        int(
+            str(int(time.time() * 1000))[:-1]
+            + str(
+                sum(
+                    2 * int(digit)
+                    if idx % 2 == 0
+                    else 3 * int(digit)
+                    for idx, digit in enumerate(str(int(time.time() * 1000))[:-1])
+                )
+                % 10
+            )
+        )
+    )
+
+def generate_signature(text: str):
+    timestamp = generate_timestamp()
+    version = 'v1.0.0'
+    secret = '8@VXGK3kKHr!u2gA' 
+    data = f"{version}#{text}#{timestamp}#{secret}"
+    signature = hashlib.md5(data.encode()).hexdigest()
+    signature = signature[::-1]
+    return {
+        "signature": signature,
+        "timestamp": timestamp,
+        "version": version
+    }
+
+def xor_hash(B: str):
+    r = []
+    i = 0
+    
+    def o(e, t):
+        o_val = 0
+        for i in range(len(t)):
+            o_val |= r[i] << (8 * i)
+        return e ^ o_val
+    
+    for e in range(len(B)):
+        t = ord(B[e])
+        r.insert(0, 255 & t)
+        
+        if len(r) >= 4:
+            i = o(i, r)
+            r = []
+    
+    if len(r) > 0:
+        i = o(i, r)
+    
+    return hex(i)[2:]
+
+def performance() -> str:
+    t = int(time.time() * 1000)
+    e = 0
+    while t == int(time.time() * 1000):
+        e += 1
+    return hex(t)[2:] + hex(e)[2:]
+
+def generate_visitor_id(user_agent: str) -> str:
+    f = performance()
+    r = hex(int(random.random() * (16**16)))[2:-2]
+    d = xor_hash(user_agent)
+    e = hex(1080 * 1920)[2:]
+    return f"{f}-{r}-{d}-{e}-{f}"
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