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extensions/openai: Major openai extension updates & fixes (#3049)

Browse Source 
* many openai updates

* total reorg & cleanup.

* fixups

* missing import os for images

* +moderations, custom_stopping_strings, more fixes

* fix bugs in completion streaming

* moderation fix (flagged)

* updated moderation categories

---------

Co-authored-by: Matthew Ashton <mashton-gitlab@zhero.org>
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extensions/openai/README.md
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@ -218,12 +218,11 @@ but there are some exceptions.
| ✅❌ | langchain | https://github.com/hwchase17/langchain | OPENAI_API_BASE=http://127.0.0.1:5001/v1 even with a good 30B-4bit model the result is poor so far. It assumes zero shot python/json coding. Some model tailored prompt formatting improves results greatly. |
| ✅❌ | Auto-GPT | https://github.com/Significant-Gravitas/Auto-GPT | OPENAI_API_BASE=http://127.0.0.1:5001/v1 Same issues as langchain. Also assumes a 4k+ context |
| ✅❌ | babyagi | https://github.com/yoheinakajima/babyagi | OPENAI_API_BASE=http://127.0.0.1:5001/v1 |
| ❌ | guidance | https://github.com/microsoft/guidance | logit_bias and logprobs not yet supported |
## Future plans
* better error handling
* model changing, esp. something for swapping loras or embedding models
* consider switching to FastAPI + starlette for SSE (openai SSE seems non-standard)
* do something about rate limiting or locking requests for completions, most systems will only be able handle a single request at a time before OOM
## Bugs? Feedback? Comments? Pull requests?

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extensions/openai/completions.py Normal file
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@ -0,0 +1,599 @@
import time
import yaml
import tiktoken
import torch
import torch.nn.functional as F
from transformers import LogitsProcessor, LogitsProcessorList
from modules import shared
from modules.text_generation import encode, decode, generate_reply
from extensions.openai.defaults import get_default_req_params, default, clamp
from extensions.openai.utils import end_line, debug_msg
from extensions.openai.errors import *
# Thanks to @Cypherfox [Cypherfoxy] for the logits code, blame to @matatonic
class LogitsBiasProcessor(LogitsProcessor):
def __init__(self, logit_bias={}):
self.logit_bias = logit_bias
super().__init__()
def __call__(self, input_ids: torch.LongTensor, logits: torch.FloatTensor) -> torch.FloatTensor:
if self.logit_bias:
keys = list([int(key) for key in self.logit_bias.keys()])
values = list([int(val) for val in self.logit_bias.values()])
logits[0, keys] += torch.tensor(values).cuda()
return logits
class LogprobProcessor(LogitsProcessor):
def __init__(self, logprobs=None):
self.logprobs = logprobs
self.token_alternatives = {}
super().__init__()
def __call__(self, input_ids: torch.LongTensor, logits: torch.FloatTensor) -> torch.FloatTensor:
if self.logprobs is not None: # 0-5
log_e_probabilities = F.log_softmax(logits, dim=1)
# XXX hack. should find the selected token and include the prob of that
# ... but we just +1 here instead because we don't know it yet.
top_values, top_indices = torch.topk(log_e_probabilities, k=self.logprobs + 1)
top_tokens = [ decode(tok) for tok in top_indices[0] ]
self.token_alternatives = dict(zip(top_tokens, top_values[0].tolist()))
return logits
def convert_logprobs_to_tiktoken(model, logprobs):
try:
encoder = tiktoken.encoding_for_model(model)
# just pick the first one if it encodes to multiple tokens... 99.9% not required and maybe worse overall.
return dict([ (encoder.decode([encoder.encode(token)[0]]), prob) for token, prob in logprobs.items() ])
except KeyError:
# assume native tokens if we can't find the tokenizer
return logprobs
def marshal_common_params(body):
# Request Parameters
# Try to use openai defaults or map them to something with the same intent
req_params = get_default_req_params()
# Common request parameters
req_params['truncation_length'] = shared.settings['truncation_length']
req_params['add_bos_token'] = shared.settings.get('add_bos_token', req_params['add_bos_token'])
req_params['seed'] = shared.settings.get('seed', req_params['seed'])
req_params['custom_stopping_strings'] = shared.settings['custom_stopping_strings']
# OpenAI API Parameters
# model - ignored for now, TODO: When we can reliably load a model or lora from a name only change this
req_params['requested_model'] = body.get('model', shared.model_name)
req_params['suffix'] = default(body, 'suffix', req_params['suffix'])
req_params['temperature'] = clamp(default(body, 'temperature', req_params['temperature']), 0.001, 1.999) # fixup absolute 0.0/2.0
req_params['top_p'] = clamp(default(body, 'top_p', req_params['top_p']), 0.001, 1.0)
n = default(body, 'n', 1)
if n != 1:
raise InvalidRequestError(message="Only n = 1 is supported.", param='n')
if 'stop' in body: # str or array, max len 4 (ignored)
if isinstance(body['stop'], str):
req_params['stopping_strings'] = [body['stop']] # non-standard parameter
elif isinstance(body['stop'], list):
req_params['stopping_strings'] = body['stop']
# presence_penalty - ignored
# frequency_penalty - ignored
# user - ignored
logits_processor = []
logit_bias = body.get('logit_bias', None)
if logit_bias: # {str: float, ...}
# XXX convert tokens from tiktoken based on requested model
# Ex.: 'logit_bias': {'1129': 100, '11442': 100, '16243': 100}
try:
encoder = tiktoken.encoding_for_model(req_params['requested_model'])
new_logit_bias = {}
for logit, bias in logit_bias.items():
for x in encode(encoder.decode([int(logit)]))[0]:
new_logit_bias[str(int(x))] = bias
print(logit_bias, '->', new_logit_bias)
logit_bias = new_logit_bias
except KeyError:
pass # assume native tokens if we can't find the tokenizer
logits_processor = [LogitsBiasProcessor(logit_bias)]
logprobs = None # coming to chat eventually
if 'logprobs' in body:
logprobs = default(body, 'logprobs', 0) # maybe cap at topk? don't clamp 0-5.
req_params['logprob_proc'] = LogprobProcessor(logprobs)
logits_processor.extend([req_params['logprob_proc']])
else:
logprobs = None
if logits_processor: # requires logits_processor support
req_params['logits_processor'] = LogitsProcessorList(logits_processor)
return req_params
def messages_to_prompt(body: dict, req_params: dict, max_tokens):
# functions
if body.get('functions', []): # chat only
raise InvalidRequestError(message="functions is not supported.", param='functions')
if body.get('function_call', ''): # chat only, 'none', 'auto', {'name': 'func'}
raise InvalidRequestError(message="function_call is not supported.", param='function_call')
if not 'messages' in body:
raise InvalidRequestError(message="messages is required", param='messages')
messages = body['messages']
role_formats = {
'user': 'user: {message}\n',
'assistant': 'assistant: {message}\n',
'system': '{message}',
'context': 'You are a helpful assistant. Answer as concisely as possible.',
'prompt': 'assistant:',
}
if not 'stopping_strings' in req_params:
req_params['stopping_strings'] = []
# Instruct models can be much better
if shared.settings['instruction_template']:
try:
instruct = yaml.safe_load(open(f"characters/instruction-following/{shared.settings['instruction_template']}.yaml", 'r'))
template = instruct['turn_template']
system_message_template = "{message}"
system_message_default = instruct['context']
bot_start = template.find('<|bot|>') # So far, 100% of instruction templates have this token
user_message_template = template[:bot_start].replace('<|user-message|>', '{message}').replace('<|user|>', instruct['user'])
bot_message_template = template[bot_start:].replace('<|bot-message|>', '{message}').replace('<|bot|>', instruct['bot'])
bot_prompt = bot_message_template[:bot_message_template.find('{message}')].rstrip(' ')
role_formats = {
'user': user_message_template,
'assistant': bot_message_template,
'system': system_message_template,
'context': system_message_default,
'prompt': bot_prompt,
}
if 'Alpaca' in shared.settings['instruction_template']:
req_params['stopping_strings'].extend(['\n###'])
elif instruct['user']: # WizardLM and some others have no user prompt.
req_params['stopping_strings'].extend(['\n' + instruct['user'], instruct['user']])
debug_msg(f"Loaded instruction role format: {shared.settings['instruction_template']}")
except Exception as e:
req_params['stopping_strings'].extend(['\nuser:'])
print(f"Exception: When loading characters/instruction-following/{shared.settings['instruction_template']}.yaml: {repr(e)}")
print("Warning: Loaded default instruction-following template for model.")
else:
req_params['stopping_strings'].extend(['\nuser:'])
print("Warning: Loaded default instruction-following template for model.")
system_msgs = []
chat_msgs = []
# You are ChatGPT, a large language model trained by OpenAI. Answer as concisely as possible. Knowledge cutoff: {knowledge_cutoff} Current date: {current_date}
context_msg = role_formats['system'].format(message=role_formats['context']) if role_formats['context'] else ''
context_msg = end_line(context_msg)
# Maybe they sent both? This is not documented in the API, but some clients seem to do this.
if 'prompt' in body:
context_msg = end_line(role_formats['system'].format(message=body['prompt'])) + context_msg
for m in messages:
role = m['role']
content = m['content']
# name = m.get('name', None)
# function_call = m.get('function_call', None) # user name or function name with output in content
msg = role_formats[role].format(message=content)
if role == 'system':
system_msgs.extend([msg])
elif role == 'function':
raise InvalidRequestError(message="role: function is not supported.", param='messages')
else:
chat_msgs.extend([msg])
system_msg = '\n'.join(system_msgs)
system_msg = end_line(system_msg)
prompt = system_msg + context_msg + ''.join(chat_msgs) + role_formats['prompt']
token_count = len(encode(prompt)[0])
if token_count >= req_params['truncation_length']:
err_msg = f"This model maximum context length is {req_params['truncation_length']} tokens. However, your messages resulted in over {token_count} tokens."
raise InvalidRequestError(message=err_msg)
if max_tokens > 0 and token_count + max_tokens > req_params['truncation_length']:
err_msg = f"This model maximum context length is {req_params['truncation_length']} tokens. However, your messages resulted in over {token_count} tokens and max_tokens is {max_tokens}."
print(f"Warning: ${err_msg}")
#raise InvalidRequestError(message=err_msg)
return prompt, token_count
def chat_completions(body: dict, is_legacy: bool=False) -> dict:
# Chat Completions
object_type = 'chat.completions'
created_time = int(time.time())
cmpl_id = "chatcmpl-%d" % (int(time.time()*1000000000))
resp_list = 'data' if is_legacy else 'choices'
# common params
req_params = marshal_common_params(body)
req_params['stream'] = False
requested_model = req_params.pop('requested_model')
logprob_proc = req_params.pop('logprob_proc', None)
req_params['top_k'] = 20 # There is no best_of/top_k param for chat, but it is much improved with a higher top_k.
# chat default max_tokens is 'inf', but also flexible
max_tokens = 0
max_tokens_str = 'length' if is_legacy else 'max_tokens'
if max_tokens_str in body:
max_tokens = default(body, max_tokens_str, req_params['truncation_length'])
req_params['max_new_tokens'] = max_tokens
else:
req_params['max_new_tokens'] = req_params['truncation_length']
# format the prompt from messages
prompt, token_count = messages_to_prompt(body, req_params, max_tokens)
# generate reply #######################################
debug_msg({'prompt': prompt, 'req_params': req_params})
stopping_strings = req_params.pop('stopping_strings', [])
logprob_proc = req_params.pop('logprob_proc', None)
generator = generate_reply(prompt, req_params, stopping_strings=stopping_strings, is_chat=False)
answer = ''
for a in generator:
answer = a
# strip extra leading space off new generated content
if answer and answer[0] == ' ':
answer = answer[1:]
completion_token_count = len(encode(answer)[0])
stop_reason = "stop"
if token_count + completion_token_count >= req_params['truncation_length'] or completion_token_count >= max_tokens:
stop_reason = "length"
resp = {
"id": cmpl_id,
"object": object_type,
"created": created_time,
"model": shared.model_name, # TODO: add Lora info?
resp_list: [{
"index": 0,
"finish_reason": stop_reason,
"message": {"role": "assistant", "content": answer}
}],
"usage": {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
}
if logprob_proc: # not official for chat yet
top_logprobs = convert_logprobs_to_tiktoken(model=requested_model, logprobs=logprob_proc.token_alternatives)
resp[resp_list][0]["logprobs"] = {'top_logprobs': [top_logprobs]}
# else:
# resp[resp_list][0]["logprobs"] = None
return resp
# generator
def stream_chat_completions(body: dict, is_legacy: bool=False):
# Chat Completions
stream_object_type = 'chat.completions.chunk'
created_time = int(time.time())
cmpl_id = "chatcmpl-%d" % (int(time.time()*1000000000))
resp_list = 'data' if is_legacy else 'choices'
# common params
req_params = marshal_common_params(body)
req_params['stream'] = True
requested_model = req_params.pop('requested_model')
logprob_proc = req_params.pop('logprob_proc', None)
req_params['top_k'] = 20 # There is no best_of/top_k param for chat, but it is much improved with a higher top_k.
# chat default max_tokens is 'inf', but also flexible
max_tokens = 0
max_tokens_str = 'length' if is_legacy else 'max_tokens'
if max_tokens_str in body:
max_tokens = default(body, max_tokens_str, req_params['truncation_length'])
req_params['max_new_tokens'] = max_tokens
else:
req_params['max_new_tokens'] = req_params['truncation_length']
# format the prompt from messages
prompt, token_count = messages_to_prompt(body, req_params, max_tokens)
def chat_streaming_chunk(content):
# begin streaming
chunk = {
"id": cmpl_id,
"object": stream_object_type,
"created": created_time,
"model": shared.model_name,
resp_list: [{
"index": 0,
"finish_reason": None,
# So yeah... do both methods? delta and messages.
"message": {'role': 'assistant', 'content': content},
"delta": {'role': 'assistant', 'content': content},
}],
}
if logprob_proc: # not official for chat yet
top_logprobs = convert_logprobs_to_tiktoken(model=requested_model, logprobs=logprob_proc.token_alternatives)
chunk[resp_list][0]["logprobs"] = {'top_logprobs': [top_logprobs]}
#else:
# chunk[resp_list][0]["logprobs"] = None
return chunk
yield chat_streaming_chunk('')
# generate reply #######################################
debug_msg({'prompt': prompt, 'req_params': req_params})
stopping_strings = req_params.pop('stopping_strings', [])
logprob_proc = req_params.pop('logprob_proc', None)
generator = generate_reply(prompt, req_params, stopping_strings=stopping_strings, is_chat=False)
answer = ''
seen_content = ''
completion_token_count = 0
for a in generator:
answer = a
len_seen = len(seen_content)
new_content = answer[len_seen:]
if not new_content or chr(0xfffd) in new_content: # partial unicode character, don't send it yet.
continue
seen_content = answer
# strip extra leading space off new generated content
if len_seen == 0 and new_content[0] == ' ':
new_content = new_content[1:]
completion_token_count += len(encode(new_content)[0])
chunk = chat_streaming_chunk(new_content)
yield chunk
stop_reason = "stop"
if token_count + completion_token_count >= req_params['truncation_length'] or completion_token_count >= max_tokens:
stop_reason = "length"
chunk = chat_streaming_chunk('')
chunk[resp_list][0]['finish_reason'] = stop_reason
chunk['usage'] = {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
yield chunk
def completions(body: dict, is_legacy: bool=False):
# Legacy
# Text Completions
object_type = 'text_completion'
created_time = int(time.time())
cmpl_id = "conv-%d" % (int(time.time()*1000000000))
resp_list = 'data' if is_legacy else 'choices'
# ... encoded as a string, array of strings, array of tokens, or array of token arrays.
prompt_str = 'context' if is_legacy else 'prompt'
if not prompt_str in body:
raise InvalidRequestError("Missing required input", param=prompt_str)
prompt = body[prompt_str]
if isinstance(prompt, list):
if prompt and isinstance(prompt[0], int):
try:
encoder = tiktoken.encoding_for_model(requested_model)
prompt = encode(encoder.decode(prompt))[0]
except KeyError:
prompt = decode(prompt)[0]
else:
raise InvalidRequestError(message="API Batched generation not yet supported.", param=prompt_str)
# common params
req_params = marshal_common_params(body)
req_params['stream'] = False
max_tokens_str = 'length' if is_legacy else 'max_tokens'
max_tokens = default(body, max_tokens_str, req_params['max_new_tokens'])
req_params['max_new_tokens'] = max_tokens
requested_model = req_params.pop('requested_model')
logprob_proc = req_params.pop('logprob_proc', None)
token_count = len(encode(prompt)[0])
if token_count + max_tokens > req_params['truncation_length']:
err_msg = f"The token count of your prompt ({token_count}) plus max_tokens ({max_tokens}) cannot exceed the model's context length ({req_params['truncation_length']})."
#print(f"Warning: ${err_msg}")
raise InvalidRequestError(message=err_msg, param=max_tokens_str)
req_params['echo'] = default(body, 'echo', req_params['echo'])
req_params['top_k'] = default(body, 'best_of', req_params['top_k'])
# generate reply #######################################
debug_msg({'prompt': prompt, 'req_params': req_params})
stopping_strings = req_params.pop('stopping_strings', [])
logprob_proc = req_params.pop('logprob_proc', None)
generator = generate_reply(prompt, req_params, stopping_strings=stopping_strings, is_chat=False)
answer = ''
for a in generator:
answer = a
# strip extra leading space off new generated content
if answer and answer[0] == ' ':
answer = answer[1:]
completion_token_count = len(encode(answer)[0])
stop_reason = "stop"
if token_count + completion_token_count >= req_params['truncation_length'] or completion_token_count >= max_tokens:
stop_reason = "length"
resp = {
"id": cmpl_id,
"object": object_type,
"created": created_time,
"model": shared.model_name, # TODO: add Lora info?
resp_list: [{
"index": 0,
"finish_reason": stop_reason,
"text": answer,
}],
"usage": {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
}
if logprob_proc:
top_logprobs = convert_logprobs_to_tiktoken(model=requested_model, logprobs=logprob_proc.token_alternatives)
resp[resp_list][0]["logprobs"] = {'top_logprobs': [top_logprobs]}
else:
resp[resp_list][0]["logprobs"] = None
return resp
# generator
def stream_completions(body: dict, is_legacy: bool=False):
# Legacy
# Text Completions
#object_type = 'text_completion'
stream_object_type = 'text_completion.chunk'
created_time = int(time.time())
cmpl_id = "conv-%d" % (int(time.time()*1000000000))
resp_list = 'data' if is_legacy else 'choices'
# ... encoded as a string, array of strings, array of tokens, or array of token arrays.
prompt_str = 'context' if is_legacy else 'prompt'
if not prompt_str in body:
raise InvalidRequestError("Missing required input", param=prompt_str)
prompt = body[prompt_str]
if isinstance(prompt, list):
if prompt and isinstance(prompt[0], int):
try:
encoder = tiktoken.encoding_for_model(requested_model)
prompt = encode(encoder.decode(prompt))[0]
except KeyError:
prompt = decode(prompt)[0]
else:
raise InvalidRequestError(message="API Batched generation not yet supported.", param=prompt_str)
# common params
req_params = marshal_common_params(body)
req_params['stream'] = True
max_tokens_str = 'length' if is_legacy else 'max_tokens'
max_tokens = default(body, max_tokens_str, req_params['max_new_tokens'])
req_params['max_new_tokens'] = max_tokens
requested_model = req_params.pop('requested_model')
logprob_proc = req_params.pop('logprob_proc', None)
token_count = len(encode(prompt)[0])
if token_count + max_tokens > req_params['truncation_length']:
err_msg = f"The token count of your prompt ({token_count}) plus max_tokens ({max_tokens}) cannot exceed the model's context length ({req_params['truncation_length']})."
#print(f"Warning: ${err_msg}")
raise InvalidRequestError(message=err_msg, param=max_tokens_str)
req_params['echo'] = default(body, 'echo', req_params['echo'])
req_params['top_k'] = default(body, 'best_of', req_params['top_k'])
def text_streaming_chunk(content):
# begin streaming
chunk = {
"id": cmpl_id,
"object": stream_object_type,
"created": created_time,
"model": shared.model_name,
resp_list: [{
"index": 0,
"finish_reason": None,
"text": content,
}],
}
if logprob_proc:
top_logprobs = convert_logprobs_to_tiktoken(model=requested_model, logprobs=logprob_proc.token_alternatives)
chunk[resp_list][0]["logprobs"] = {'top_logprobs': [top_logprobs]}
else:
chunk[resp_list][0]["logprobs"] = None
return chunk
yield text_streaming_chunk('')
# generate reply #######################################
debug_msg({'prompt': prompt, 'req_params': req_params})
stopping_strings = req_params.pop('stopping_strings', [])
logprob_proc = req_params.pop('logprob_proc', None)
generator = generate_reply(prompt, req_params, stopping_strings=stopping_strings, is_chat=False)
answer = ''
seen_content = ''
completion_token_count = 0
for a in generator:
answer = a
len_seen = len(seen_content)
new_content = answer[len_seen:]
if not new_content or chr(0xfffd) in new_content: # partial unicode character, don't send it yet.
continue
seen_content = answer
# strip extra leading space off new generated content
if len_seen == 0 and new_content[0] == ' ':
new_content = new_content[1:]
chunk = text_streaming_chunk(new_content)
completion_token_count += len(encode(new_content)[0])
yield chunk
stop_reason = "stop"
if token_count + completion_token_count >= req_params['truncation_length'] or completion_token_count >= max_tokens:
stop_reason = "length"
chunk = text_streaming_chunk('')
chunk[resp_list][0]["finish_reason"] = stop_reason
chunk["usage"] = {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
yield chunk

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import copy
# Slightly different defaults for OpenAI's API
# Data type is important, Ex. use 0.0 for a float 0
default_req_params = {
'max_new_tokens': 16, # 'Inf' for chat
'temperature': 1.0,
'top_p': 1.0,
'top_k': 1, # choose 20 for chat in absence of another default
'repetition_penalty': 1.18,
'repetition_penalty_range': 0,
'encoder_repetition_penalty': 1.0,
'suffix': None,
'stream': False,
'echo': False,
'seed': -1,
# 'n' : default(body, 'n', 1), # 'n' doesn't have a direct map
'truncation_length': 2048, # first use shared.settings value
'add_bos_token': True,
'do_sample': True,
'typical_p': 1.0,
'epsilon_cutoff': 0.0, # In units of 1e-4
'eta_cutoff': 0.0, # In units of 1e-4
'tfs': 1.0,
'top_a': 0.0,
'min_length': 0,
'no_repeat_ngram_size': 0,
'num_beams': 1,
'penalty_alpha': 0.0,
'length_penalty': 1.0,
'early_stopping': False,
'mirostat_mode': 0,
'mirostat_tau': 5.0,
'mirostat_eta': 0.1,
'ban_eos_token': False,
'skip_special_tokens': True,
'custom_stopping_strings': '',
# 'logits_processor' - conditionally passed
# 'stopping_strings' - temporarily used
# 'logprobs' - temporarily used
# 'requested_model' - temporarily used
}
def get_default_req_params():
return copy.deepcopy(default_req_params)
# little helper to get defaults if arg is present but None and should be the same type as default.
def default(dic, key, default):
val = dic.get(key, default)
if type(val) != type(default):
# maybe it's just something like 1 instead of 1.0
try:
v = type(default)(val)
if type(val)(v) == val: # if it's the same value passed in, it's ok.
return v
except:
pass
val = default
return val
def clamp(value, minvalue, maxvalue):
return max(minvalue, min(value, maxvalue))

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extensions/openai/edits.py Normal file
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@ -0,0 +1,102 @@
import time
import yaml
import os
from modules import shared
from extensions.openai.defaults import get_default_req_params
from extensions.openai.utils import debug_msg
from extensions.openai.errors import *
from modules.text_generation import encode, generate_reply
def edits(instruction: str, input: str, temperature = 1.0, top_p = 1.0) -> dict:
created_time = int(time.time()*1000)
# Request parameters
req_params = get_default_req_params()
stopping_strings = []
# Alpaca is verbose so a good default prompt
default_template = (
"Below is an instruction that describes a task, paired with an input that provides further context. "
"Write a response that appropriately completes the request.\n\n"
"### Instruction:\n{instruction}\n\n### Input:\n{input}\n\n### Response:\n"
)
instruction_template = default_template
# Use the special instruction/input/response template for anything trained like Alpaca
if shared.settings['instruction_template']:
if 'Alpaca' in shared.settings['instruction_template']:
stopping_strings.extend(['\n###'])
else:
try:
instruct = yaml.safe_load(open(f"characters/instruction-following/{shared.settings['instruction_template']}.yaml", 'r'))
template = instruct['turn_template']
template = template\
.replace('<|user|>', instruct.get('user', ''))\
.replace('<|bot|>', instruct.get('bot', ''))\
.replace('<|user-message|>', '{instruction}\n{input}')
instruction_template = instruct.get('context', '') + template[:template.find('<|bot-message|>')].rstrip(' ')
if instruct['user']:
stopping_strings.extend(['\n' + instruct['user'], instruct['user'] ])
except Exception as e:
instruction_template = default_template
print(f"Exception: When loading characters/instruction-following/{shared.settings['instruction_template']}.yaml: {repr(e)}")
print("Warning: Loaded default instruction-following template (Alpaca) for model.")
else:
stopping_strings.extend(['\n###'])
print("Warning: Loaded default instruction-following template (Alpaca) for model.")
edit_task = instruction_template.format(instruction=instruction, input=input)
truncation_length = shared.settings['truncation_length']
token_count = len(encode(edit_task)[0])
max_tokens = truncation_length - token_count
if max_tokens < 1:
err_msg = f"This model maximum context length is {truncation_length} tokens. However, your messages resulted in over {truncation_length - max_tokens} tokens."
raise InvalidRequestError(err_msg, param='input')
req_params['max_new_tokens'] = max_tokens
req_params['truncation_length'] = truncation_length
req_params['temperature'] = temperature
req_params['top_p'] = top_p
req_params['seed'] = shared.settings.get('seed', req_params['seed'])
req_params['add_bos_token'] = shared.settings.get('add_bos_token', req_params['add_bos_token'])
req_params['custom_stopping_strings'] = shared.settings['custom_stopping_strings']
debug_msg({'edit_template': edit_task, 'req_params': req_params, 'token_count': token_count})
generator = generate_reply(edit_task, req_params, stopping_strings=stopping_strings, is_chat=False)
longest_stop_len = max([len(x) for x in stopping_strings] + [0])
answer = ''
for a in generator:
answer = a
# some reply's have an extra leading space to fit the instruction template, just clip it off from the reply.
if edit_task[-1] != '\n' and answer and answer[0] == ' ':
answer = answer[1:]
completion_token_count = len(encode(answer)[0])
resp = {
"object": "edit",
"created": created_time,
"choices": [{
"text": answer,
"index": 0,
}],
"usage": {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
}
return resp

50
extensions/openai/embeddings.py Normal file
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@ -0,0 +1,50 @@
import os
from sentence_transformers import SentenceTransformer
from extensions.openai.utils import float_list_to_base64, debug_msg
from extensions.openai.errors import *
st_model = os.environ["OPENEDAI_EMBEDDING_MODEL"] if "OPENEDAI_EMBEDDING_MODEL" in os.environ else "all-mpnet-base-v2"
embeddings_model = None
def load_embedding_model(model):
try:
emb_model = SentenceTransformer(model)
print(f"\nLoaded embedding model: {model}, max sequence length: {emb_model.max_seq_length}")
except Exception as e:
print(f"\nError: Failed to load embedding model: {model}")
raise ServiceUnavailableError(f"Error: Failed to load embedding model: {model}", internal_message = repr(e))
return emb_model
def get_embeddings_model():
global embeddings_model, st_model
if st_model and not embeddings_model:
embeddings_model = load_embedding_model(st_model) # lazy load the model
return embeddings_model
def get_embeddings_model_name():
global st_model
return st_model
def embeddings(input: list, encoding_format: str):
embeddings = get_embeddings_model().encode(input).tolist()
if encoding_format == "base64":
data = [{"object": "embedding", "embedding": float_list_to_base64(emb), "index": n} for n, emb in enumerate(embeddings)]
else:
data = [{"object": "embedding", "embedding": emb, "index": n} for n, emb in enumerate(embeddings)]
response = {
"object": "list",
"data": data,
"model": st_model, # return the real model
"usage": {
"prompt_tokens": 0,
"total_tokens": 0,
}
}
debug_msg(f"Embeddings return size: {len(embeddings[0])}, number: {len(embeddings)}")
return response

27
extensions/openai/errors.py Normal file
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@ -0,0 +1,27 @@
class OpenAIError(Exception):
def __init__(self, message = None, code = 500, internal_message = ''):
self.message = message
self.code = code
self.internal_message = internal_message
def __repr__(self):
return "%s(message=%r, code=%d)" % (
self.__class__.__name__,
self.message,
self.code,
)
class InvalidRequestError(OpenAIError):
def __init__(self, message, param, code = 400, error_type ='InvalidRequestError', internal_message = ''):
super(OpenAIError, self).__init__(message, code, error_type, internal_message)
self.param = param
def __repr__(self):
return "%s(message=%r, code=%d, param=%s)" % (
self.__class__.__name__,
self.message,
self.code,
self.param,
)
class ServiceUnavailableError(OpenAIError):
def __init__(self, message = None, code = 500, error_type ='ServiceUnavailableError', internal_message = ''):
super(OpenAIError, self).__init__(message, code, error_type, internal_message)

48
extensions/openai/images.py Normal file
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@ -0,0 +1,48 @@
import os
import time
import requests
from extensions.openai.errors import *
def generations(prompt: str, size: str, response_format: str, n: int):
# Stable Diffusion callout wrapper for txt2img
# Low effort implementation for compatibility. With only "prompt" being passed and assuming DALL-E
# the results will be limited and likely poor. SD has hundreds of models and dozens of settings.
# If you want high quality tailored results you should just use the Stable Diffusion API directly.
# it's too general an API to try and shape the result with specific tags like "masterpiece", etc,
# Will probably work best with the stock SD models.
# SD configuration is beyond the scope of this API.
# At this point I will not add the edits and variations endpoints (ie. img2img) because they
# require changing the form data handling to accept multipart form data, also to properly support
# url return types will require file management and a web serving files... Perhaps later!
width, height = [ int(x) for x in size.split('x') ] # ignore the restrictions on size
# to hack on better generation, edit default payload.
payload = {
'prompt': prompt, # ignore prompt limit of 1000 characters
'width': width,
'height': height,
'batch_size': n,
'restore_faces': True, # slightly less horrible
}
resp = {
'created': int(time.time()),
'data': []
}
# TODO: support SD_WEBUI_AUTH username:password pair.
sd_url = f"{os.environ['SD_WEBUI_URL']}/sdapi/v1/txt2img"
response = requests.post(url=sd_url, json=payload)
r = response.json()
if response.status_code != 200 or 'images' not in r:
raise ServiceUnavailableError(r.get('detail', [{'msg': 'Unknown error calling Stable Diffusion'}])[0]['msg'], code = response.status_code)
# r['parameters']...
for b64_json in r['images']:
if response_format == 'b64_json':
resp['data'].extend([{'b64_json': b64_json}])
else:
resp['data'].extend([{'url': f'data:image/png;base64,{b64_json}'}]) # yeah it's lazy. requests.get() will not work with this
return resp

77
extensions/openai/models.py Normal file
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@ -0,0 +1,77 @@
from modules import shared
from modules.utils import get_available_models
from modules.models import load_model, unload_model
from modules.models_settings import (get_model_settings_from_yamls,
update_model_parameters)
from extensions.openai.embeddings import get_embeddings_model_name
from extensions.openai.errors import *
def get_current_model_list() -> list:
return [ shared.model_name ] # The real chat/completions model, maybe "None"
def get_pseudo_model_list() -> list:
return [ # these are expected by so much, so include some here as a dummy
'gpt-3.5-turbo',
'text-embedding-ada-002',
]
def load_model(model_name: str) -> dict:
resp = {
"id": model_name,
"object": "engine",
"owner": "self",
"ready": True,
}
if model_name not in get_pseudo_model_list() + [ get_embeddings_model_name() ] + get_current_model_list(): # Real model only
# No args. Maybe it works anyways!
# TODO: hack some heuristics into args for better results
shared.model_name = model_name
unload_model()
model_settings = get_model_settings_from_yamls(shared.model_name)
shared.settings.update(model_settings)
update_model_parameters(model_settings, initial=True)
if shared.settings['mode'] != 'instruct':
shared.settings['instruction_template'] = None
shared.model, shared.tokenizer = load_model(shared.model_name)
if not shared.model: # load failed.
shared.model_name = "None"
raise OpenAIError(f"Model load failed for: {shared.model_name}")
return resp
def list_models(is_legacy: bool = False) -> dict:
# TODO: Lora's?
all_model_list = get_current_model_list() + [ get_embeddings_model_name() ] + get_pseudo_model_list() + get_available_models()
models = {}
if is_legacy:
models = [{ "id": id, "object": "engine", "owner": "user", "ready": True } for id in all_model_list ]
if not shared.model:
models[0]['ready'] = False
else:
models = [{ "id": id, "object": "model", "owned_by": "user", "permission": [] } for id in all_model_list ]
resp = {
"object": "list",
"data": models,
}
return resp
def model_info(model_name: str) -> dict:
return {
"id": model_name,
"object": "model",
"owned_by": "user",
"permission": []
}

70
extensions/openai/moderations.py Normal file
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@ -0,0 +1,70 @@
import time
import numpy as np
from numpy.linalg import norm
from extensions.openai.embeddings import get_embeddings_model
moderations_disabled = False # return 0/false
category_embeddings = None
antonym_embeddings = None
categories = [ "sexual", "hate", "harassment", "self-harm", "sexual/minors", "hate/threatening", "violence/graphic", "self-harm/intent", "self-harm/instructions", "harassment/threatening", "violence" ]
flag_threshold = 0.5
def get_category_embeddings():
global category_embeddings, categories
if category_embeddings is None:
embeddings = get_embeddings_model().encode(categories).tolist()
category_embeddings = dict(zip(categories, embeddings))
return category_embeddings
def cosine_similarity(a, b):
return np.dot(a, b) / (norm(a) * norm(b))
# seems most openai like with all-mpnet-base-v2
def mod_score(a, b):
return 2.0 * np.dot(a, b)
def moderations(input):
global category_embeddings, categories, flag_threshold, moderations_disabled
results = {
"id": f"modr-{int(time.time()*1e9)}",
"model": "text-moderation-001",
"results": [],
}
embeddings_model = get_embeddings_model()
if not embeddings_model or moderations_disabled:
results['results'] = [{
'categories': dict([ (C, False) for C in categories]),
'category_scores': dict([ (C, 0.0) for C in categories]),
'flagged': False,
}]
return results
category_embeddings = get_category_embeddings()
# input, string or array
if isinstance(input, str):
input = [input]
for in_str in input:
for ine in embeddings_model.encode([in_str]).tolist():
category_scores = dict([ (C, mod_score(category_embeddings[C], ine)) for C in categories ])
category_flags = dict([ (C, bool(category_scores[C] > flag_threshold)) for C in categories ])
flagged = any(category_flags.values())
results['results'].extend([{
'flagged': flagged,
'categories': category_flags,
'category_scores': category_scores,
}])
print(results)
return results

1
extensions/openai/requirements.txt
View File

@ -1,2 +1,3 @@
flask_cloudflared==0.0.12
sentence-transformers
tiktoken

893
extensions/openai/script.py
View File

@ -1,108 +1,27 @@
import base64
import json
import os
import time
import requests
import yaml
import numpy as np
import traceback
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from threading import Thread
from modules.utils import get_available_models
from modules.models import load_model, unload_model
from modules.models_settings import (get_model_settings_from_yamls,
update_model_parameters)
from modules import shared
from modules.text_generation import encode, generate_reply
from extensions.openai.tokens import token_count, token_encode, token_decode
import extensions.openai.models as OAImodels
import extensions.openai.edits as OAIedits
import extensions.openai.embeddings as OAIembeddings
import extensions.openai.images as OAIimages
import extensions.openai.moderations as OAImoderations
import extensions.openai.completions as OAIcompletions
from extensions.openai.errors import *
from extensions.openai.utils import debug_msg
from extensions.openai.defaults import (get_default_req_params, default, clamp)
params = {
'port': int(os.environ.get('OPENEDAI_PORT')) if 'OPENEDAI_PORT' in os.environ else 5001,
}
debug = True if 'OPENEDAI_DEBUG' in os.environ else False
# Slightly different defaults for OpenAI's API
# Data type is important, Ex. use 0.0 for a float 0
default_req_params = {
'max_new_tokens': 200,
'temperature': 1.0,
'top_p': 1.0,
'top_k': 1,
'repetition_penalty': 1.18,
'repetition_penalty_range': 0,
'encoder_repetition_penalty': 1.0,
'suffix': None,
'stream': False,
'echo': False,
'seed': -1,
# 'n' : default(body, 'n', 1), # 'n' doesn't have a direct map
'truncation_length': 2048,
'add_bos_token': True,
'do_sample': True,
'typical_p': 1.0,
'epsilon_cutoff': 0.0, # In units of 1e-4
'eta_cutoff': 0.0, # In units of 1e-4
'tfs': 1.0,
'top_a': 0.0,
'min_length': 0,
'no_repeat_ngram_size': 0,
'num_beams': 1,
'penalty_alpha': 0.0,
'length_penalty': 1.0,
'early_stopping': False,
'mirostat_mode': 0,
'mirostat_tau': 5.0,
'mirostat_eta': 0.1,
'ban_eos_token': False,
'skip_special_tokens': True,
'custom_stopping_strings': '',
}
# Optional, install the module and download the model to enable
# v1/embeddings
try:
from sentence_transformers import SentenceTransformer
except ImportError:
pass
st_model = os.environ["OPENEDAI_EMBEDDING_MODEL"] if "OPENEDAI_EMBEDDING_MODEL" in os.environ else "all-mpnet-base-v2"
embedding_model = None
# little helper to get defaults if arg is present but None and should be the same type as default.
def default(dic, key, default):
val = dic.get(key, default)
if type(val) != type(default):
# maybe it's just something like 1 instead of 1.0
try:
v = type(default)(val)
if type(val)(v) == val: # if it's the same value passed in, it's ok.
return v
except:
pass
val = default
return val
def clamp(value, minvalue, maxvalue):
return max(minvalue, min(value, maxvalue))
def float_list_to_base64(float_list):
# Convert the list to a float32 array that the OpenAPI client expects
float_array = np.array(float_list, dtype="float32")
# Get raw bytes
bytes_array = float_array.tobytes()
# Encode bytes into base64
encoded_bytes = base64.b64encode(bytes_array)
# Turn raw base64 encoded bytes into ASCII
ascii_string = encoded_bytes.decode('ascii')
return ascii_string
class Handler(BaseHTTPRequestHandler):
def send_access_control_headers(self):
self.send_header("Access-Control-Allow-Origin", "*")
@ -118,11 +37,43 @@ class Handler(BaseHTTPRequestHandler):
"Authorization"
)
def openai_error(self, message, code = 500, error_type = 'APIError', param = '', internal_message = ''):
def do_OPTIONS(self):
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
self.wfile.write("OK".encode('utf-8'))
def start_sse(self):
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'text/event-stream')
self.send_header('Cache-Control', 'no-cache')
# self.send_header('Connection', 'keep-alive')
self.end_headers()
def send_sse(self, chunk: dict):
response = 'data: ' + json.dumps(chunk) + '\r\n\r\n'
debug_msg(response)
self.wfile.write(response.encode('utf-8'))
def end_sse(self):
self.wfile.write('data: [DONE]\r\n\r\n'.encode('utf-8'))
def return_json(self, ret: dict, code: int = 200, no_debug=False):
self.send_response(code)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
response = json.dumps(ret)
r_utf8 = response.encode('utf-8')
self.wfile.write(r_utf8)
if not no_debug:
debug_msg(r_utf8)
def openai_error(self, message, code = 500, error_type = 'APIError', param = '', internal_message = ''):
error_resp = {
'error': {
'message': message,
@ -132,121 +83,61 @@ class Handler(BaseHTTPRequestHandler):
}
}
if internal_message:
error_resp['internal_message'] = internal_message
print(internal_message)
#error_resp['internal_message'] = internal_message
response = json.dumps(error_resp)
self.wfile.write(response.encode('utf-8'))
self.return_json(error_resp, code)
def do_OPTIONS(self):
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
self.wfile.write("OK".encode('utf-8'))
def openai_error_handler(func):
def wrapper(self):
try:
func(self)
except ServiceUnavailableError as e:
self.openai_error(e.message, e.code, e.error_type, internal_message=e.internal_message)
except InvalidRequestError as e:
self.openai_error(e.message, e.code, e.error_type, e.param, internal_message=e.internal_message)
except OpenAIError as e:
self.openai_error(e.message, e.code, e.error_type, internal_message=e.internal_message)
except Exception as e:
self.openai_error(repr(e), 500, 'OpenAIError', internal_message=traceback.format_exc())
return wrapper
@openai_error_handler
def do_GET(self):
if self.path.startswith('/v1/engines') or self.path.startswith('/v1/models'):
current_model_list = [ shared.model_name ] # The real chat/completions model, maybe "None"
embeddings_model_list = [ st_model ] if embedding_model else [] # The real sentence transformer embeddings model
pseudo_model_list = [ # these are expected by so much, so include some here as a dummy
'gpt-3.5-turbo', # /v1/chat/completions
'text-curie-001', # /v1/completions, 2k context
'text-davinci-002' # /v1/embeddings text-embedding-ada-002:1536, text-davinci-002:768
]
debug_msg(self.requestline)
debug_msg(self.headers)
if self.path.startswith('/v1/engines') or self.path.startswith('/v1/models'):
is_legacy = 'engines' in self.path
is_list = self.path in ['/v1/engines', '/v1/models']
resp = ''
if is_legacy and not is_list: # load model
if is_legacy and not is_list:
model_name = self.path[self.path.find('/v1/engines/') + len('/v1/engines/'):]
resp = {
"id": model_name,
"object": "engine",
"owner": "self",
"ready": True,
}
if model_name not in pseudo_model_list + embeddings_model_list + current_model_list: # Real model only
# No args. Maybe it works anyways!
# TODO: hack some heuristics into args for better results
shared.model_name = model_name
unload_model()
model_settings = get_model_settings_from_yamls(shared.model_name)
shared.settings.update(model_settings)
update_model_parameters(model_settings, initial=True)
if shared.settings['mode'] != 'instruct':
shared.settings['instruction_template'] = None
shared.model, shared.tokenizer = load_model(shared.model_name)
if not shared.model: # load failed.
shared.model_name = "None"
resp['id'] = "None"
resp['ready'] = False
resp = OAImodels.load_model(model_name)
elif is_list:
# TODO: Lora's?
available_model_list = get_available_models()
all_model_list = current_model_list + embeddings_model_list + pseudo_model_list + available_model_list
models = {}
if is_legacy:
models = [{ "id": id, "object": "engine", "owner": "user", "ready": True } for id in all_model_list ]
if not shared.model:
models[0]['ready'] = False
resp = OAImodels.list_models(is_legacy)
else:
models = [{ "id": id, "object": "model", "owned_by": "user", "permission": [] } for id in all_model_list ]
model_name = self.path[len('/v1/models/'):]
resp = OAImodels.model_info()
resp = {
"object": "list",
"data": models,
}
else:
the_model_name = self.path[len('/v1/models/'):]
resp = {
"id": the_model_name,
"object": "model",
"owned_by": "user",
"permission": []
}
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
response = json.dumps(resp)
self.wfile.write(response.encode('utf-8'))
self.return_json(resp)
elif '/billing/usage' in self.path:
# Ex. /v1/dashboard/billing/usage?start_date=2023-05-01&end_date=2023-05-31
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
response = json.dumps({
"total_usage": 0,
})
self.wfile.write(response.encode('utf-8'))
self.return_json({"total_usage": 0}, no_debug=True)
else:
self.send_error(404)
@openai_error_handler
def do_POST(self):
if debug:
print(self.headers) # did you know... python-openai sends your linux kernel & python version?
debug_msg(self.requestline)
debug_msg(self.headers)
content_length = int(self.headers['Content-Length'])
body = json.loads(self.rfile.read(content_length).decode('utf-8'))
if debug:
print(body)
debug_msg(body)
if '/completions' in self.path or '/generate' in self.path:
@ -255,621 +146,109 @@ class Handler(BaseHTTPRequestHandler):
return
is_legacy = '/generate' in self.path
is_chat_request = 'chat' in self.path
resp_list = 'data' if is_legacy else 'choices'
# XXX model is ignored for now
# model = body.get('model', shared.model_name) # ignored, use existing for now
model = shared.model_name
created_time = int(time.time())
cmpl_id = "chatcmpl-%d" % (created_time) if is_chat_request else "conv-%d" % (created_time)
# Request Parameters
# Try to use openai defaults or map them to something with the same intent
req_params = default_req_params.copy()
stopping_strings = []
if 'stop' in body:
if isinstance(body['stop'], str):
stopping_strings.extend([body['stop']])
elif isinstance(body['stop'], list):
stopping_strings.extend(body['stop'])
truncation_length = default(shared.settings, 'truncation_length', 2048)
truncation_length = clamp(default(body, 'truncation_length', truncation_length), 1, truncation_length)
default_max_tokens = truncation_length if is_chat_request else 16 # completions default, chat default is 'inf' so we need to cap it.
max_tokens_str = 'length' if is_legacy else 'max_tokens'
max_tokens = default(body, max_tokens_str, default(shared.settings, 'max_new_tokens', default_max_tokens))
# if the user assumes OpenAI, the max_tokens is way too large - try to ignore it unless it's small enough
req_params['max_new_tokens'] = max_tokens
req_params['truncation_length'] = truncation_length
req_params['temperature'] = clamp(default(body, 'temperature', default_req_params['temperature']), 0.001, 1.999) # fixup absolute 0.0
req_params['top_p'] = clamp(default(body, 'top_p', default_req_params['top_p']), 0.001, 1.0)
req_params['top_k'] = default(body, 'best_of', default_req_params['top_k'])
req_params['suffix'] = default(body, 'suffix', default_req_params['suffix'])
req_params['stream'] = default(body, 'stream', default_req_params['stream'])
req_params['echo'] = default(body, 'echo', default_req_params['echo'])
req_params['seed'] = shared.settings.get('seed', default_req_params['seed'])
req_params['add_bos_token'] = shared.settings.get('add_bos_token', default_req_params['add_bos_token'])
is_streaming = req_params['stream']
self.send_response(200)
self.send_access_control_headers()
if is_streaming:
self.send_header('Content-Type', 'text/event-stream')
self.send_header('Cache-Control', 'no-cache')
# self.send_header('Connection', 'keep-alive')
else:
self.send_header('Content-Type', 'application/json')
self.end_headers()
token_count = 0
completion_token_count = 0
prompt = ''
stream_object_type = ''
object_type = ''
if is_chat_request:
# Chat Completions
stream_object_type = 'chat.completions.chunk'
object_type = 'chat.completions'
messages = body['messages']
role_formats = {
'user': 'user: {message}\n',
'assistant': 'assistant: {message}\n',
'system': '{message}',
'context': 'You are a helpful assistant. Answer as concisely as possible.',
'prompt': 'assistant:',
}
# Instruct models can be much better
if shared.settings['instruction_template']:
try:
instruct = yaml.safe_load(open(f"characters/instruction-following/{shared.settings['instruction_template']}.yaml", 'r'))
template = instruct['turn_template']
system_message_template = "{message}"
system_message_default = instruct['context']
bot_start = template.find('<|bot|>') # So far, 100% of instruction templates have this token
user_message_template = template[:bot_start].replace('<|user-message|>', '{message}').replace('<|user|>', instruct['user'])
bot_message_template = template[bot_start:].replace('<|bot-message|>', '{message}').replace('<|bot|>', instruct['bot'])
bot_prompt = bot_message_template[:bot_message_template.find('{message}')].rstrip(' ')
role_formats = {
'user': user_message_template,
'assistant': bot_message_template,
'system': system_message_template,
'context': system_message_default,
'prompt': bot_prompt,
}
if 'Alpaca' in shared.settings['instruction_template']:
stopping_strings.extend(['\n###'])
elif instruct['user']: # WizardLM and some others have no user prompt.
stopping_strings.extend(['\n' + instruct['user'], instruct['user']])
if debug:
print(f"Loaded instruction role format: {shared.settings['instruction_template']}")
except Exception as e:
stopping_strings.extend(['\nuser:'])
print(f"Exception: When loading characters/instruction-following/{shared.settings['instruction_template']}.yaml: {repr(e)}")
print("Warning: Loaded default instruction-following template for model.")
else:
stopping_strings.extend(['\nuser:'])
print("Warning: Loaded default instruction-following template for model.")
system_msgs = []
chat_msgs = []
# You are ChatGPT, a large language model trained by OpenAI. Answer as concisely as possible. Knowledge cutoff: {knowledge_cutoff} Current date: {current_date}
context_msg = role_formats['system'].format(message=role_formats['context']) if role_formats['context'] else ''
if context_msg:
system_msgs.extend([context_msg])
# Maybe they sent both? This is not documented in the API, but some clients seem to do this.
if 'prompt' in body:
prompt_msg = role_formats['system'].format(message=body['prompt'])
system_msgs.extend([prompt_msg])
for m in messages:
role = m['role']
content = m['content']
msg = role_formats[role].format(message=content)
if role == 'system':
system_msgs.extend([msg])
else:
chat_msgs.extend([msg])
# can't really truncate the system messages
system_msg = '\n'.join(system_msgs)
if system_msg and system_msg[-1] != '\n':
system_msg = system_msg + '\n'
system_token_count = len(encode(system_msg)[0])
remaining_tokens = truncation_length - system_token_count
chat_msg = ''
while chat_msgs:
new_msg = chat_msgs.pop()
new_size = len(encode(new_msg)[0])
if new_size <= remaining_tokens:
chat_msg = new_msg + chat_msg
remaining_tokens -= new_size
else:
print(f"Warning: too many messages for context size, dropping {len(chat_msgs) + 1} oldest message(s).")
break
prompt = system_msg + chat_msg + role_formats['prompt']
token_count = len(encode(prompt)[0])
else:
# Text Completions
stream_object_type = 'text_completion.chunk'
object_type = 'text_completion'
# ... encoded as a string, array of strings, array of tokens, or array of token arrays.
if is_legacy:
prompt = body['context'] # Older engines.generate API
else:
prompt = body['prompt'] # XXX this can be different types
if isinstance(prompt, list):
self.openai_error("API Batched generation not yet supported.")
return
token_count = len(encode(prompt)[0])
if token_count >= truncation_length:
new_len = int(len(prompt) * shared.settings['truncation_length'] / token_count)
prompt = prompt[-new_len:]
new_token_count = len(encode(prompt)[0])
print(f"Warning: truncating prompt to {new_len} characters, was {token_count} tokens. Now: {new_token_count} tokens.")
token_count = new_token_count
if truncation_length - token_count < req_params['max_new_tokens']:
print(f"Warning: Ignoring max_new_tokens ({req_params['max_new_tokens']}), too large for the remaining context. Remaining tokens: {truncation_length - token_count}")
req_params['max_new_tokens'] = truncation_length - token_count
print(f"Warning: Set max_new_tokens = {req_params['max_new_tokens']}")
is_streaming = body.get('stream', False)
if is_streaming:
# begin streaming
chunk = {
"id": cmpl_id,
"object": stream_object_type,
"created": created_time,
"model": shared.model_name,
resp_list: [{
"index": 0,
"finish_reason": None,
}],
}
self.start_sse()
if stream_object_type == 'text_completion.chunk':
chunk[resp_list][0]["text"] = ""
response = []
if 'chat' in self.path:
response = OAIcompletions.stream_chat_completions(body, is_legacy=is_legacy)
else:
# So yeah... do both methods? delta and messages.
chunk[resp_list][0]["message"] = {'role': 'assistant', 'content': ''}
chunk[resp_list][0]["delta"] = {'role': 'assistant', 'content': ''}
response = OAIcompletions.stream_completions(body, is_legacy=is_legacy)
response = 'data: ' + json.dumps(chunk) + '\r\n\r\n'
self.wfile.write(response.encode('utf-8'))
for resp in response:
self.send_sse(resp)
# generate reply #######################################
if debug:
print({'prompt': prompt, 'req_params': req_params})
generator = generate_reply(prompt, req_params, stopping_strings=stopping_strings, is_chat=False)
self.end_sse()
answer = ''
seen_content = ''
longest_stop_len = max([len(x) for x in stopping_strings] + [0])
for a in generator:
answer = a
stop_string_found = False
len_seen = len(seen_content)
search_start = max(len_seen - longest_stop_len, 0)
for string in stopping_strings:
idx = answer.find(string, search_start)
if idx != -1:
answer = answer[:idx] # clip it.
stop_string_found = True
if stop_string_found:
break
# If something like "\nYo" is generated just before "\nYou:"
# is completed, buffer and generate more, don't send it
buffer_and_continue = False
for string in stopping_strings:
for j in range(len(string) - 1, 0, -1):
if answer[-j:] == string[:j]:
buffer_and_continue = True
break
else:
continue
break
if buffer_and_continue:
continue
if is_streaming:
# Streaming
new_content = answer[len_seen:]
if not new_content or chr(0xfffd) in new_content: # partial unicode character, don't send it yet.
continue
seen_content = answer
chunk = {
"id": cmpl_id,
"object": stream_object_type,
"created": created_time,
"model": shared.model_name,
resp_list: [{
"index": 0,
"finish_reason": None,
}],
}
# strip extra leading space off new generated content
if len_seen == 0 and new_content[0] == ' ':
new_content = new_content[1:]
if stream_object_type == 'text_completion.chunk':
chunk[resp_list][0]['text'] = new_content
response = ''
if 'chat' in self.path:
response = OAIcompletions.chat_completions(body, is_legacy=is_legacy)
else:
# So yeah... do both methods? delta and messages.
chunk[resp_list][0]['message'] = {'content': new_content}
chunk[resp_list][0]['delta'] = {'content': new_content}
response = 'data: ' + json.dumps(chunk) + '\r\n\r\n'
self.wfile.write(response.encode('utf-8'))
completion_token_count += len(encode(new_content)[0])
response = OAIcompletions.completions(body, is_legacy=is_legacy)
if is_streaming:
chunk = {
"id": cmpl_id,
"object": stream_object_type,
"created": created_time,
"model": model, # TODO: add Lora info?
resp_list: [{
"index": 0,
"finish_reason": "stop",
}],
"usage": {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
}
if stream_object_type == 'text_completion.chunk':
chunk[resp_list][0]['text'] = ''
else:
# So yeah... do both methods? delta and messages.
chunk[resp_list][0]['message'] = {'content': ''}
chunk[resp_list][0]['delta'] = {'content': ''}
response = 'data: ' + json.dumps(chunk) + '\r\n\r\ndata: [DONE]\r\n\r\n'
self.wfile.write(response.encode('utf-8'))
# Finished if streaming.
if debug:
if answer and answer[0] == ' ':
answer = answer[1:]
print({'answer': answer}, chunk)
return
# strip extra leading space off new generated content
if answer and answer[0] == ' ':
answer = answer[1:]
if debug:
print({'response': answer})
completion_token_count = len(encode(answer)[0])
stop_reason = "stop"
if token_count + completion_token_count >= truncation_length:
stop_reason = "length"
resp = {
"id": cmpl_id,
"object": object_type,
"created": created_time,
"model": model, # TODO: add Lora info?
resp_list: [{
"index": 0,
"finish_reason": stop_reason,
}],
"usage": {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
}
if is_chat_request:
resp[resp_list][0]["message"] = {"role": "assistant", "content": answer}
else:
resp[resp_list][0]["text"] = answer
response = json.dumps(resp)
self.wfile.write(response.encode('utf-8'))
self.return_json(response)
elif '/edits' in self.path:
# deprecated
if not shared.model:
self.openai_error("No model loaded.")
return
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
req_params = get_default_req_params()
created_time = int(time.time())
# Using Alpaca format, this may work with other models too.
instruction = body['instruction']
input = body.get('input', '')
temperature = clamp(default(body, 'temperature', req_params['temperature']), 0.001, 1.999) # fixup absolute 0.0
top_p = clamp(default(body, 'top_p', req_params['top_p']), 0.001, 1.0)
# Request parameters
req_params = default_req_params.copy()
stopping_strings = []
response = OAIedits.edits(instruction, input, temperature, top_p)
# Alpaca is verbose so a good default prompt
default_template = (
"Below is an instruction that describes a task, paired with an input that provides further context. "
"Write a response that appropriately completes the request.\n\n"
"### Instruction:\n{instruction}\n\n### Input:\n{input}\n\n### Response:\n"
)
instruction_template = default_template
# Use the special instruction/input/response template for anything trained like Alpaca
if shared.settings['instruction_template']:
if 'Alpaca' in shared.settings['instruction_template']:
stopping_strings.extend(['\n###'])
else:
try:
instruct = yaml.safe_load(open(f"characters/instruction-following/{shared.settings['instruction_template']}.yaml", 'r'))
template = instruct['turn_template']
template = template\
.replace('<|user|>', instruct.get('user', ''))\
.replace('<|bot|>', instruct.get('bot', ''))\
.replace('<|user-message|>', '{instruction}\n{input}')
instruction_template = instruct.get('context', '') + template[:template.find('<|bot-message|>')].rstrip(' ')
if instruct['user']:
stopping_strings.extend(['\n' + instruct['user'], instruct['user'] ])
except Exception as e:
instruction_template = default_template
print(f"Exception: When loading characters/instruction-following/{shared.settings['instruction_template']}.yaml: {repr(e)}")
print("Warning: Loaded default instruction-following template (Alpaca) for model.")
else:
stopping_strings.extend(['\n###'])
print("Warning: Loaded default instruction-following template (Alpaca) for model.")
edit_task = instruction_template.format(instruction=instruction, input=input)
truncation_length = default(shared.settings, 'truncation_length', 2048)
token_count = len(encode(edit_task)[0])
max_tokens = truncation_length - token_count
req_params['max_new_tokens'] = max_tokens
req_params['truncation_length'] = truncation_length
req_params['temperature'] = clamp(default(body, 'temperature', default_req_params['temperature']), 0.001, 1.999) # fixup absolute 0.0
req_params['top_p'] = clamp(default(body, 'top_p', default_req_params['top_p']), 0.001, 1.0)
req_params['seed'] = shared.settings.get('seed', default_req_params['seed'])
req_params['add_bos_token'] = shared.settings.get('add_bos_token', default_req_params['add_bos_token'])
if debug:
print({'edit_template': edit_task, 'req_params': req_params, 'token_count': token_count})
generator = generate_reply(edit_task, req_params, stopping_strings=stopping_strings, is_chat=False)
longest_stop_len = max([len(x) for x in stopping_strings] + [0])
answer = ''
seen_content = ''
for a in generator:
answer = a
stop_string_found = False
len_seen = len(seen_content)
search_start = max(len_seen - longest_stop_len, 0)
for string in stopping_strings:
idx = answer.find(string, search_start)
if idx != -1:
answer = answer[:idx] # clip it.
stop_string_found = True
if stop_string_found:
break
# some reply's have an extra leading space to fit the instruction template, just clip it off from the reply.
if edit_task[-1] != '\n' and answer and answer[0] == ' ':
answer = answer[1:]
completion_token_count = len(encode(answer)[0])
resp = {
"object": "edit",
"created": created_time,
"choices": [{
"text": answer,
"index": 0,
}],
"usage": {
"prompt_tokens": token_count,
"completion_tokens": completion_token_count,
"total_tokens": token_count + completion_token_count
}
}
if debug:
print({'answer': answer, 'completion_token_count': completion_token_count})
response = json.dumps(resp)
self.wfile.write(response.encode('utf-8'))
self.return_json(response)
elif '/images/generations' in self.path and 'SD_WEBUI_URL' in os.environ:
# Stable Diffusion callout wrapper for txt2img
# Low effort implementation for compatibility. With only "prompt" being passed and assuming DALL-E
# the results will be limited and likely poor. SD has hundreds of models and dozens of settings.
# If you want high quality tailored results you should just use the Stable Diffusion API directly.
# it's too general an API to try and shape the result with specific tags like "masterpiece", etc,
# Will probably work best with the stock SD models.
# SD configuration is beyond the scope of this API.
# At this point I will not add the edits and variations endpoints (ie. img2img) because they
# require changing the form data handling to accept multipart form data, also to properly support
# url return types will require file management and a web serving files... Perhaps later!
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
width, height = [ int(x) for x in default(body, 'size', '1024x1024').split('x') ] # ignore the restrictions on size
prompt = body['prompt']
size = default(body, 'size', '1024x1024')
response_format = default(body, 'response_format', 'url') # or b64_json
n = default(body, 'n', 1) # ignore the batch limits of max 10
payload = {
'prompt': body['prompt'], # ignore prompt limit of 1000 characters
'width': width,
'height': height,
'batch_size': default(body, 'n', 1) # ignore the batch limits of max 10
}
response = OAIimages.generations(prompt=prompt, size=size, response_format=response_format, n=n)
resp = {
'created': int(time.time()),
'data': []
}
self.return_json(response, no_debug=True)
# TODO: support SD_WEBUI_AUTH username:password pair.
sd_url = f"{os.environ['SD_WEBUI_URL']}/sdapi/v1/txt2img"
elif '/embeddings' in self.path:
encoding_format = body.get('encoding_format', '')
response = requests.post(url=sd_url, json=payload)
r = response.json()
# r['parameters']...
for b64_json in r['images']:
if response_format == 'b64_json':
resp['data'].extend([{'b64_json': b64_json}])
else:
resp['data'].extend([{'url': f'data:image/png;base64,{b64_json}'}]) # yeah it's lazy. requests.get() will not work with this
input = body.get('input', body.get('text', ''))
if not input:
raise InvalidRequestError("Missing required argument input", params='input')
response = json.dumps(resp)
self.wfile.write(response.encode('utf-8'))
elif '/embeddings' in self.path and embedding_model is not None:
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
input = body['input'] if 'input' in body else body['text']
if type(input) is str:
input = [input]
embeddings = embedding_model.encode(input).tolist()
response = OAIembeddings.embeddings(input, encoding_format)
def enc_emb(emb):
# If base64 is specified, encode. Otherwise, do nothing.
if body.get("encoding_format", "") == "base64":
return float_list_to_base64(emb)
else:
return emb
data = [{"object": "embedding", "embedding": enc_emb(emb), "index": n} for n, emb in enumerate(embeddings)]
response = json.dumps({
"object": "list",
"data": data,
"model": st_model, # return the real model
"usage": {
"prompt_tokens": 0,
"total_tokens": 0,
}
})
if debug:
print(f"Embeddings return size: {len(embeddings[0])}, number: {len(embeddings)}")
self.wfile.write(response.encode('utf-8'))
self.return_json(response, no_debug=True)
elif '/moderations' in self.path:
# for now do nothing, just don't error.
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
input = body['input']
if not input:
raise InvalidRequestError("Missing required argument input", params='input')
response = json.dumps({
"id": "modr-5MWoLO",
"model": "text-moderation-001",
"results": [{
"categories": {
"hate": False,
"hate/threatening": False,
"self-harm": False,
"sexual": False,
"sexual/minors": False,
"violence": False,
"violence/graphic": False
},
"category_scores": {
"hate": 0.0,
"hate/threatening": 0.0,
"self-harm": 0.0,
"sexual": 0.0,
"sexual/minors": 0.0,
"violence": 0.0,
"violence/graphic": 0.0
},
"flagged": False
}]
})
self.wfile.write(response.encode('utf-8'))
response = OAImoderations.moderations(input)
self.return_json(response, no_debug=True)
elif self.path == '/api/v1/token-count':
# NOT STANDARD. lifted from the api extension, but it's still very useful to calculate tokenized length client side.
self.send_response(200)
self.send_access_control_headers()
self.send_header('Content-Type', 'application/json')
self.end_headers()
response = token_count(body['prompt'])
tokens = encode(body['prompt'])[0]
response = json.dumps({
'results': [{
'tokens': len(tokens)
}]
})
self.wfile.write(response.encode('utf-8'))
self.return_json(response, no_debug=True)
elif self.path == '/api/v1/token/encode':
# NOT STANDARD. needed to support logit_bias, logprobs and token arrays for native models
encoding_format = body.get('encoding_format', '')
response = token_encode(body['input'], encoding_format)
self.return_json(response, no_debug=True)
elif self.path == '/api/v1/token/decode':
# NOT STANDARD. needed to support logit_bias, logprobs and token arrays for native models
encoding_format = body.get('encoding_format', '')
response = token_decode(body['input'], encoding_format)
self.return_json(response, no_debug=True)
else:
print(self.path, self.headers)
self.send_error(404)
def run_server():
global embedding_model
try:
embedding_model = SentenceTransformer(st_model)
print(f"\nLoaded embedding model: {st_model}, max sequence length: {embedding_model.max_seq_length}")
except:
print(f"\nFailed to load embedding model: {st_model}")
pass
server_addr = ('0.0.0.0' if shared.args.listen else '127.0.0.1', params['port'])
server = ThreadingHTTPServer(server_addr, Handler)
if shared.args.share:

37
extensions/openai/tokens.py Normal file
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from extensions.openai.utils import float_list_to_base64
from modules.text_generation import encode, decode
def token_count(prompt):
tokens = encode(prompt)[0]
return {
'results': [{
'tokens': len(tokens)
}]
}
def token_encode(input, encoding_format = ''):
#if isinstance(input, list):
tokens = encode(input)[0]
return {
'results': [{
'encoding_format': encoding_format,
'tokens': float_list_to_base64(tokens) if encoding_format == "base64" else tokens,
'length': len(tokens),
}]
}
def token_decode(tokens, encoding_format):
#if isinstance(input, list):
# if encoding_format == "base64":
# tokens = base64_to_float_list(tokens)
output = decode(tokens)[0]
return {
'results': [{
'text': output
}]
}

26
extensions/openai/utils.py Normal file
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import os
import base64
import numpy as np
def float_list_to_base64(float_list):
# Convert the list to a float32 array that the OpenAPI client expects
float_array = np.array(float_list, dtype="float32")
# Get raw bytes
bytes_array = float_array.tobytes()
# Encode bytes into base64
encoded_bytes = base64.b64encode(bytes_array)
# Turn raw base64 encoded bytes into ASCII
ascii_string = encoded_bytes.decode('ascii')
return ascii_string
def end_line(s):
if s and s[-1] != '\n':
s = s + '\n'
return s
def debug_msg(*args, **kwargs):
if 'OPENEDAI_DEBUG' in os.environ:
print(*args, **kwargs)