text-generation-webui/api-example-stream.py

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'''
Contributed by SagsMug. Thank you SagsMug.
https://github.com/oobabooga/text-generation-webui/pull/175
'''
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import asyncio
import json
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import random
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import string
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import websockets
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# Note, Gradio may pick a different fn value as the definition of the Gradio app changes.
# You can always launch the web UI and inspect the websocket stream using your browser's dev tools
# to determine what value Gradio expects here.
GRADIO_FN = 29
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def random_hash():
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letters = string.ascii_lowercase + string.digits
return ''.join(random.choice(letters) for i in range(9))
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async def run(context):
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server = "127.0.0.1"
params = {
'max_new_tokens': 200,
'do_sample': True,
'temperature': 0.5,
'top_p': 0.9,
'typical_p': 1,
'repetition_penalty': 1.05,
'encoder_repetition_penalty': 1.0,
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'top_k': 0,
'min_length': 0,
'no_repeat_ngram_size': 0,
'num_beams': 1,
'penalty_alpha': 0,
'length_penalty': 1,
'early_stopping': False,
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'seed': -1,
'add_bos_token': True,
'truncation_length': 2048,
'custom_stopping_strings': [],
'ban_eos_token': False
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}
payload = json.dumps([context, params])
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session = random_hash()
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async with websockets.connect(f"ws://{server}:7860/queue/join") as websocket:
while content := json.loads(await websocket.recv()):
# Python3.10 syntax, replace with if elif on older
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match content["msg"]:
case "send_hash":
await websocket.send(json.dumps({
"session_hash": session,
"fn_index": GRADIO_FN
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}))
case "estimation":
pass
case "send_data":
await websocket.send(json.dumps({
"session_hash": session,
"fn_index": GRADIO_FN,
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"data": [
payload
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]
}))
case "process_starts":
pass
case "process_generating" | "process_completed":
yield content["output"]["data"][0]
# You can search for your desired end indicator and
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# stop generation by closing the websocket here
if (content["msg"] == "process_completed"):
break
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prompt = "What I would like to say is the following: "
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async def get_result():
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async for response in run(prompt):
# Print intermediate steps
print(response)
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# Print final result
print(response)
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asyncio.run(get_result())