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| import requests | |
| import json | |
| import re | |
| from urllib.parse import quote | |
| def extract_between_tags(text, start_tag, end_tag): | |
| start_index = text.find(start_tag) | |
| end_index = text.find(end_tag, start_index) | |
| return text[start_index+len(start_tag):end_index] | |
| class VectaraQuery(): | |
| def __init__(self, api_key: str, customer_id: str, corpus_id: str, prompt_name: str = None): | |
| self.customer_id = customer_id | |
| self.corpus_id = corpus_id | |
| self.api_key = api_key | |
| self.prompt_name = prompt_name if prompt_name else "vectara-experimental-summary-ext-2023-12-11-large" | |
| self.conv_id = None | |
| def get_body(self, user_response: str): | |
| corpora_key_list = [{ | |
| 'customer_id': self.customer_id, 'corpus_id': self.corpus_id, 'lexical_interpolation_config': {'lambda': 0.025} | |
| }] | |
| user_response = user_response.replace('"', '\\"') # Escape double quotes | |
| prompt = f''' | |
| [ | |
| {{ | |
| "role": "system", | |
| "content": "You are an assistant that provides information about drink names based on a given corpus." | |
| }}, | |
| {{ | |
| "role": "user", | |
| "content": "{user_response}" | |
| }} | |
| ] | |
| ''' | |
| return { | |
| 'query': [ | |
| { | |
| 'query': user_response, | |
| 'start': 0, | |
| 'numResults': 10, | |
| 'corpusKey': corpora_key_list, | |
| 'context_config': { | |
| 'sentences_before': 2, | |
| 'sentences_after': 2, | |
| 'start_tag': "%START_SNIPPET%", | |
| 'end_tag': "%END_SNIPPET%", | |
| } | |
| } | |
| ] | |
| } | |
| def get_headers(self): | |
| return { | |
| "Content-Type": "application/json", | |
| "Accept": "application/json", | |
| "customer-id": self.customer_id, | |
| "x-api-key": self.api_key, | |
| "grpc-timeout": "60S" | |
| } | |
| def submit_query(self, query_str: str): | |
| endpoint = f"https://api.vectara.io/v1/stream-query" | |
| body = self.get_body(query_str) | |
| response = requests.post(endpoint, data=json.dumps(body), verify=True, headers=self.get_headers(), stream=True) | |
| if response.status_code != 200: | |
| print(f"Query failed with code {response.status_code}, reason {response.reason}, text {response.text}") | |
| return "Sorry, something went wrong in my brain. Please try again later." | |
| chunks = [] | |
| accumulated_text = "" # Initialize text accumulation | |
| pattern_max_length = 50 # Example heuristic | |
| for line in response.iter_lines(): | |
| if line: # filter out keep-alive new lines | |
| data = json.loads(line.decode('utf-8')) | |
| res = data['result'] | |
| response_set = res['responseSet'] | |
| if response_set is None: | |
| # grab next chunk and yield it as output | |
| summary = res.get('summary', None) | |
| if summary is None or len(summary)==0: | |
| continue | |
| else: | |
| chat = summary.get('chat', None) | |
| if chat and chat.get('status', None): | |
| st_code = chat['status'] | |
| print(f"Chat query failed with code {st_code}") | |
| if st_code == 'RESOURCE_EXHAUSTED': | |
| self.conv_id = None | |
| return 'Sorry, Vectara chat turns exceeds plan limit.' | |
| return 'Sorry, something went wrong in my brain. Please try again later.' | |
| conv_id = chat.get('conversationId', None) if chat else None | |
| if conv_id: | |
| self.conv_id = conv_id | |
| chunk = summary['text'] | |
| accumulated_text += chunk # Append current chunk to accumulation | |
| if len(accumulated_text) > pattern_max_length: | |
| accumulated_text = re.sub(r"\[\d+\]", "", accumulated_text) | |
| accumulated_text = re.sub(r"\s+\.", ".", accumulated_text) | |
| out_chunk = accumulated_text[:-pattern_max_length] | |
| chunks.append(out_chunk) | |
| yield out_chunk | |
| accumulated_text = accumulated_text[-pattern_max_length:] | |
| if summary['done']: | |
| break | |
| # yield the last piece | |
| if len(accumulated_text) > 0: | |
| accumulated_text = re.sub(r" \[\d+\]\.", ".", accumulated_text) | |
| chunks.append(accumulated_text) | |
| yield accumulated_text | |
| return ''.join(chunks) | |