285 lines
11 KiB
Python
285 lines
11 KiB
Python
import os
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import json
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import requests
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import os
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import hashlib
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import json
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from pathlib import Path
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BASE_URL = os.environ.get('OLLAMA_HOST', 'http://localhost:11434')
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# Generate a response for a given prompt with a provided model. This is a streaming endpoint, so will be a series of responses.
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# The final response object will include statistics and additional data from the request. Use the callback function to override
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# the default handler.
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def generate(model_name, prompt, system=None, template=None, format="", context=None, options=None, callback=None):
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try:
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url = f"{BASE_URL}/api/generate"
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payload = {
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"model": model_name,
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"prompt": prompt,
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"system": system,
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"template": template,
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"context": context,
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"options": options,
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"format": format,
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}
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# Remove keys with None values
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payload = {k: v for k, v in payload.items() if v is not None}
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with requests.post(url, json=payload, stream=True) as response:
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response.raise_for_status()
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# Creating a variable to hold the context history of the final chunk
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final_context = None
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# Variable to hold concatenated response strings if no callback is provided
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full_response = ""
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# Iterating over the response line by line and displaying the details
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for line in response.iter_lines():
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if line:
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# Parsing each line (JSON chunk) and extracting the details
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chunk = json.loads(line)
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# If a callback function is provided, call it with the chunk
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if callback:
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callback(chunk)
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else:
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# If this is not the last chunk, add the "response" field value to full_response and print it
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if not chunk.get("done"):
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response_piece = chunk.get("response", "")
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full_response += response_piece
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print(response_piece, end="", flush=True)
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# Check if it's the last chunk (done is true)
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if chunk.get("done"):
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final_context = chunk.get("context")
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# Return the full response and the final context
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return full_response, final_context
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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return None, None
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# Create a blob file on the server if it doesn't exist.
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def create_blob(digest, file_path):
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url = f"{BASE_URL}/api/blobs/{digest}"
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# Check if the blob exists
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response = requests.head(url)
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if response.status_code != 404:
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return # Blob already exists, no need to upload
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response.raise_for_status()
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# Upload the blob
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with open(file_path, 'rb') as file_data:
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requests.post(url, data=file_data)
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# Create a model from a Modelfile. Use the callback function to override the default handler.
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def create(model_name, filename, callback=None):
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try:
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file_path = Path(filename).expanduser().resolve()
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processed_lines = []
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# Read and process the modelfile
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with open(file_path, 'r') as f:
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for line in f:
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# Skip empty or whitespace-only lines
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if not line.strip():
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continue
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command, args = line.split(maxsplit=1)
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if command.upper() in ["FROM", "ADAPTER"]:
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path = Path(args.strip()).expanduser()
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# Check if path is relative and resolve it
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if not path.is_absolute():
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path = (file_path.parent / path)
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# Skip if file does not exist for "model", this is handled by the server
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if not path.exists():
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processed_lines.append(line)
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continue
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# Calculate SHA-256 hash
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with open(path, 'rb') as bin_file:
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hash = hashlib.sha256()
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hash.update(bin_file.read())
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blob = f"sha256:{hash.hexdigest()}"
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# Add the file to the remote server
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create_blob(blob, path)
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# Replace path with digest in the line
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line = f"{command} @{blob}\n"
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processed_lines.append(line)
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# Combine processed lines back into a single string
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modelfile_content = '\n'.join(processed_lines)
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url = f"{BASE_URL}/api/create"
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payload = {"name": model_name, "modelfile": modelfile_content}
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# Making a POST request with the stream parameter set to True to handle streaming responses
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with requests.post(url, json=payload, stream=True) as response:
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response.raise_for_status()
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# Iterating over the response line by line and displaying the status
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for line in response.iter_lines():
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if line:
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chunk = json.loads(line)
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if callback:
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callback(chunk)
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else:
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print(f"Status: {chunk.get('status')}")
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except Exception as e:
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print(f"An error occurred: {e}")
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# Pull a model from a the model registry. Cancelled pulls are resumed from where they left off, and multiple
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# calls to will share the same download progress. Use the callback function to override the default handler.
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def pull(model_name, insecure=False, callback=None):
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try:
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url = f"{BASE_URL}/api/pull"
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payload = {
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"name": model_name,
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"insecure": insecure
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}
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# Making a POST request with the stream parameter set to True to handle streaming responses
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with requests.post(url, json=payload, stream=True) as response:
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response.raise_for_status()
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# Iterating over the response line by line and displaying the details
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for line in response.iter_lines():
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if line:
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# Parsing each line (JSON chunk) and extracting the details
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chunk = json.loads(line)
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# If a callback function is provided, call it with the chunk
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if callback:
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callback(chunk)
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else:
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# Print the status message directly to the console
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print(chunk.get('status', ''), end='', flush=True)
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# If there's layer data, you might also want to print that (adjust as necessary)
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if 'digest' in chunk:
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print(f" - Digest: {chunk['digest']}", end='', flush=True)
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print(f" - Total: {chunk['total']}", end='', flush=True)
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print(f" - Completed: {chunk['completed']}", end='\n', flush=True)
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else:
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print()
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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# Push a model to the model registry. Use the callback function to override the default handler.
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def push(model_name, insecure=False, callback=None):
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try:
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url = f"{BASE_URL}/api/push"
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payload = {
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"name": model_name,
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"insecure": insecure
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}
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# Making a POST request with the stream parameter set to True to handle streaming responses
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with requests.post(url, json=payload, stream=True) as response:
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response.raise_for_status()
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# Iterating over the response line by line and displaying the details
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for line in response.iter_lines():
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if line:
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# Parsing each line (JSON chunk) and extracting the details
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chunk = json.loads(line)
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# If a callback function is provided, call it with the chunk
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if callback:
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callback(chunk)
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else:
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# Print the status message directly to the console
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print(chunk.get('status', ''), end='', flush=True)
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# If there's layer data, you might also want to print that (adjust as necessary)
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if 'digest' in chunk:
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print(f" - Digest: {chunk['digest']}", end='', flush=True)
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print(f" - Total: {chunk['total']}", end='', flush=True)
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print(f" - Completed: {chunk['completed']}", end='\n', flush=True)
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else:
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print()
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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# List models that are available locally.
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def list():
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try:
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response = requests.get(f"{BASE_URL}/api/tags")
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response.raise_for_status()
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data = response.json()
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models = data.get('models', [])
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return models
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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return None
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# Copy a model. Creates a model with another name from an existing model.
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def copy(source, destination):
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try:
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# Create the JSON payload
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payload = {
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"source": source,
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"destination": destination
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}
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response = requests.post(f"{BASE_URL}/api/copy", json=payload)
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response.raise_for_status()
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# If the request was successful, return a message indicating that the copy was successful
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return "Copy successful"
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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return None
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# Delete a model and its data.
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def delete(model_name):
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try:
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url = f"{BASE_URL}/api/delete"
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payload = {"name": model_name}
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response = requests.delete(url, json=payload)
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response.raise_for_status()
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return "Delete successful"
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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return None
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# Show info about a model.
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def show(model_name):
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try:
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url = f"{BASE_URL}/api/show"
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payload = {"name": model_name}
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response = requests.post(url, json=payload)
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response.raise_for_status()
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# Parse the JSON response and return it
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data = response.json()
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return data
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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return None
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def heartbeat():
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try:
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url = f"{BASE_URL}/"
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response = requests.head(url)
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response.raise_for_status()
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return "Ollama is running"
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except requests.exceptions.RequestException as e:
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print(f"An error occurred: {e}")
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return "Ollama is not running"
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