Copyright	(c) 2025 Tushar Adhatrao
License	MIT
Maintainer	Tushar Adhatrao <tusharadhatrao@gmail.com>
Stability	experimental
Safe Haskell	None
Language	Haskell2010

Data.Ollama.Generate

Contents

Generate Texts
Configuration
Response and Configuration Types
Error Types

Description

This module provides functions and types for generating text using an Ollama model. It includes APIs for sending generation requests, both in IO (generate) and monadic (generateM) contexts, with support for streaming and non-streaming responses. The GenerateOps type configures the generation request, allowing customization of the model, prompt, images, format, and other parameters. The defaultGenerateOps provides a convenient starting point for configuration.

The module supports advanced features like Base64-encoded images, custom templates, and model-specific options (e.g., temperature). It also includes validation to ensure required fields are non-empty.

Example:

>>> let ops = defaultGenerateOps { modelName = "gemma3", prompt = "Write a poem." }
>>> generate ops Nothing
Right (GenerateResponse ...)

Synopsis

generate :: GenerateOps -> Maybe OllamaConfig -> IO (Either OllamaError GenerateResponse)
generateM :: MonadIO m => GenerateOps -> Maybe OllamaConfig -> m (Either OllamaError GenerateResponse)
defaultGenerateOps :: GenerateOps
data GenerateOps = GenerateOps {
- modelName :: !Text
- prompt :: !Text
- suffix :: Maybe Text
- images :: !(Maybe [Text])
- format :: !(Maybe Format)
- system :: !(Maybe Text)
- template :: !(Maybe Text)
- stream :: !(Maybe (GenerateResponse -> IO (), IO ()))
- raw :: !(Maybe Bool)
- keepAlive :: !(Maybe Int)
- options :: !(Maybe ModelOptions)
- think :: !(Maybe Bool)
}
validateGenerateOps :: GenerateOps -> Either OllamaError GenerateOps
data GenerateResponse = GenerateResponse {
- model :: !Text
- createdAt :: !UTCTime
- genResponse :: !Text
- done :: !Bool
- totalDuration :: !(Maybe Int64)
- loadDuration :: !(Maybe Int64)
- promptEvalCount :: !(Maybe Int64)
- promptEvalDuration :: !(Maybe Int64)
- evalCount :: !(Maybe Int64)
- evalDuration :: !(Maybe Int64)
- thinking :: !(Maybe Text)
}
data Format
- = JsonFormat
- | SchemaFormat Schema
data OllamaConfig = OllamaConfig {
- hostUrl :: Text
- timeout :: Int
- onModelStart :: Maybe (IO ())
- onModelError :: Maybe (IO ())
- onModelFinish :: Maybe (IO ())
- retryCount :: Maybe Int
- retryDelay :: Maybe Int
- commonManager :: Maybe Manager
}
defaultOllamaConfig :: OllamaConfig
data ModelOptions = ModelOptions {
- numKeep :: Maybe Int
- seed :: Maybe Int
- numPredict :: Maybe Int
- topK :: Maybe Int
- topP :: Maybe Double
- minP :: Maybe Double
- typicalP :: Maybe Double
- repeatLastN :: Maybe Int
- temperature :: Maybe Double
- repeatPenalty :: Maybe Double
- presencePenalty :: Maybe Double
- frequencyPenalty :: Maybe Double
- penalizeNewline :: Maybe Bool
- stop :: Maybe [Text]
- numa :: Maybe Bool
- numCtx :: Maybe Int
- numBatch :: Maybe Int
- numGpu :: Maybe Int
- mainGpu :: Maybe Int
- useMmap :: Maybe Bool
- numThread :: Maybe Int
}
defaultModelOptions :: ModelOptions
data OllamaError

Generate Texts

generate :: GenerateOps -> Maybe OllamaConfig -> IO (Either OllamaError GenerateResponse) Source #

Generates text using the specified model and configuration.

Validates the GenerateOps configuration and sends a POST request to the "api/generate" endpoint. Supports both streaming and non-streaming responses based on the stream field in GenerateOps. Returns Right with a GenerateResponse on success or Left with an OllamaError on failure.

Example:

>>> let ops = defaultGenerateOps { modelName = "gemma3", prompt = "Write a short poem." }
>>> generate ops Nothing
Right (GenerateResponse ...)

generateM :: MonadIO m => GenerateOps -> Maybe OllamaConfig -> m (Either OllamaError GenerateResponse) Source #

MonadIO version of generate for use in monadic contexts.

Lifts the generate function into a MonadIO context, allowing it to be used in monadic computations.

Example:

>>> import Control.Monad.IO.Class
>>> let ops = defaultGenerateOps { modelName = "gemma3", prompt = "Hello!" }
>>> runReaderT (generateM ops Nothing) someContext
Right (GenerateResponse ...)

Configuration

defaultGenerateOps :: GenerateOps Source #

Default configuration for text generation.

Provides a default GenerateOps with the "gemma3" model and an empty prompt. Other fields are set to Nothing or default values. Can be customized by modifying fields as needed.

Example:

>>> let ops = defaultGenerateOps { modelName = "customModel", prompt = "Hello!" }
>>> generate ops Nothing

data GenerateOps Source #

Configuration for a text generation request.

Constructors

GenerateOps

Fields

modelName :: !Text
The name of the model to use for generation (e.g., "gemma3").
prompt :: !Text
The prompt text to provide to the model for generating a response.
suffix :: Maybe Text
Optional suffix to append to the generated text (not supported by all models).
images :: !(Maybe [Text])
Optional list of Base64-encoded images to include with the request.
format :: !(Maybe Format)
Optional format specifier for the response (e.g., JSON).
Since: 0.1.3.0
system :: !(Maybe Text)
Optional system text to include in the generation context.
template :: !(Maybe Text)
Optional template to format the response.
stream :: !(Maybe (GenerateResponse -> IO (), IO ()))
Optional streaming functions: the first handles each response chunk, the second flushes the stream.
raw :: !(Maybe Bool)
Optional flag to return the raw response.
keepAlive :: !(Maybe Int)
Optional override for how long (in minutes) the model stays loaded in memory (default: 5 minutes).
options :: !(Maybe ModelOptions)
Optional model parameters (e.g., temperature) as specified in the Modelfile.
Since: 0.1.3.0
think :: !(Maybe Bool)
Optional flag to enable thinking mode.
Since: 0.2.0.0

Instances

Instances details

ToJSON GenerateOps Source #
Instance details Defined in Data.Ollama.Generate Methods toJSON :: GenerateOps -> Value # toEncoding :: GenerateOps -> Encoding # toJSONList :: [GenerateOps] -> Value # toEncodingList :: [GenerateOps] -> Encoding # omitField :: GenerateOps -> Bool #
Show GenerateOps Source #
Instance details Defined in Data.Ollama.Generate Methods showsPrec :: Int -> GenerateOps -> ShowS # show :: GenerateOps -> String # showList :: [GenerateOps] -> ShowS #
Eq GenerateOps Source #
Instance details Defined in Data.Ollama.Generate Methods (==) :: GenerateOps -> GenerateOps -> Bool # (/=) :: GenerateOps -> GenerateOps -> Bool #

validateGenerateOps :: GenerateOps -> Either OllamaError GenerateOps Source #

Validates GenerateOps to ensure required fields are non-empty.

Checks that the modelName and prompt fields are not empty. Returns Right with the validated GenerateOps or Left with an OllamaError if validation fails.

Example:

>>> validateGenerateOps defaultGenerateOps
Left (InvalidRequest "Prompt cannot be empty")
--
-- @since 0.2.0.0

Response and Configuration Types

data GenerateResponse Source #

Result type for generate function containing the model's response and meta-information.

Constructors

GenerateResponse

Fields

model :: !Text
The name of the model that generated the response.
createdAt :: !UTCTime
The timestamp when the response was created.
genResponse :: !Text
The generated response from the model.
done :: !Bool
A flag indicating whether the generation process is complete.
totalDuration :: !(Maybe Int64)
Optional total duration in milliseconds for the generation process.
loadDuration :: !(Maybe Int64)
Optional load duration in milliseconds for loading the model.
promptEvalCount :: !(Maybe Int64)
Optional count of prompt evaluations during the generation process.
promptEvalDuration :: !(Maybe Int64)
Optional duration in milliseconds for evaluating the prompt.
evalCount :: !(Maybe Int64)
Optional count of evaluations during the generation process.
evalDuration :: !(Maybe Int64)
Optional duration in milliseconds for evaluations during the generation process.
thinking :: !(Maybe Text)
Thinking of reasoning models; if think is set to true
Since: 0.2.0.0

Instances

Instances details

FromJSON GenerateResponse Source #
Instance details Defined in Data.Ollama.Common.Types Methods parseJSON :: Value -> Parser GenerateResponse # parseJSONList :: Value -> Parser [GenerateResponse] # omittedField :: Maybe GenerateResponse #
Show GenerateResponse Source #
Instance details Defined in Data.Ollama.Common.Types Methods showsPrec :: Int -> GenerateResponse -> ShowS # show :: GenerateResponse -> String # showList :: [GenerateResponse] -> ShowS #
Eq GenerateResponse Source #
Instance details Defined in Data.Ollama.Common.Types Methods (==) :: GenerateResponse -> GenerateResponse -> Bool # (/=) :: GenerateResponse -> GenerateResponse -> Bool #
HasDone GenerateResponse Source #
Instance details Defined in Data.Ollama.Common.Types Methods getDone :: GenerateResponse -> Bool Source #

data Format Source #

Format specification for the chat output.

Since: 0.1.3.0

Constructors

JsonFormat
SchemaFormat Schema

Instances

Instances details

ToJSON Format Source #
Instance details Defined in Data.Ollama.Common.Types Methods toJSON :: Format -> Value # toEncoding :: Format -> Encoding # toJSONList :: [Format] -> Value # toEncodingList :: [Format] -> Encoding # omitField :: Format -> Bool #
Show Format Source #
Instance details Defined in Data.Ollama.Common.Types Methods showsPrec :: Int -> Format -> ShowS # show :: Format -> String # showList :: [Format] -> ShowS #
Eq Format Source #
Instance details Defined in Data.Ollama.Common.Types Methods (==) :: Format -> Format -> Bool # (/=) :: Format -> Format -> Bool #

data OllamaConfig Source #

Configuration for the Ollama client. Used across all requests to customize behavior such as timeouts, retries, custom HTTP manager, and lifecycle hooks. -- -- @since 0.2.0.0

Constructors

OllamaConfig

Fields

hostUrl :: Text
Base URL for the Ollama server (default: http://127.0.0.1:11434)
timeout :: Int
Timeout in seconds for API requests (ignored if commonManager is set)
onModelStart :: Maybe (IO ())
Callback executed when a model starts
onModelError :: Maybe (IO ())
Callback executed if a model encounters an error
onModelFinish :: Maybe (IO ())
Callback executed when a model finishes (not called on error)
retryCount :: Maybe Int
Number of retries on failure (default: 0 if Nothing)
retryDelay :: Maybe Int
Delay between retries in seconds (if applicable)
commonManager :: Maybe Manager
Shared HTTP manager; disables timeout and retry settings

Instances

Instances details

Generic OllamaConfig Source #

Instance details

Defined in Data.Ollama.Common.Config

Associated Types

type Rep OllamaConfig

Instance details

Defined in Data.Ollama.Common.Config

Methods

from :: OllamaConfig -> Rep OllamaConfig x #

to :: Rep OllamaConfig x -> OllamaConfig #

type Rep OllamaConfig Source #

Instance details

Defined in Data.Ollama.Common.Config

defaultOllamaConfig :: OllamaConfig Source #

A default configuration pointing to localhost:11434 with 90s timeout and no hooks or retry logic.

data ModelOptions Source #

Optional model tuning parameters that influence generation behavior.

Since: 0.2.0.0

Constructors

ModelOptions

Fields

Instances

Instances details

ToJSON ModelOptions Source #	Custom ToJSON instance for Options
Instance details Defined in Data.Ollama.Common.Types Methods toJSON :: ModelOptions -> Value # toEncoding :: ModelOptions -> Encoding # toJSONList :: [ModelOptions] -> Value # toEncodingList :: [ModelOptions] -> Encoding # omitField :: ModelOptions -> Bool #
Show ModelOptions Source #
Instance details Defined in Data.Ollama.Common.Types Methods showsPrec :: Int -> ModelOptions -> ShowS # show :: ModelOptions -> String # showList :: [ModelOptions] -> ShowS #
Eq ModelOptions Source #
Instance details Defined in Data.Ollama.Common.Types Methods (==) :: ModelOptions -> ModelOptions -> Bool # (/=) :: ModelOptions -> ModelOptions -> Bool #

defaultModelOptions :: ModelOptions Source #

Default model options for API requests.

Provides a default ModelOptions configuration with all fields set to Nothing, suitable as a starting point for customizing model parameters like temperature or token limits.

Example:

>>> let opts = defaultModelOptions { temperature = Just 0.7 }

Error Types

data OllamaError Source #

Represents all possible errors that may occur when using the Ollama client.

Since: 0.2.0.0

Constructors

HttpError HttpException	Low-level HTTP exception (connection failure, etc.)
DecodeError DecodingErrorMessage DecodingFailedValue	Failure to decode a JSON response, includes message and raw value
ApiError Text	Error returned from Ollama's HTTP API
FileError IOException	Error during file operations (e.g., loading an image)
JsonSchemaError String	Mismatch in expected JSON schema or structure
TimeoutError String	Request timed out
InvalidRequest String	Request is malformed or violates input constraints