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Reusable components for bottle

Project description

# bottle-utils

Reusable components for bottle

## Responses

### Plugin response.JsonResponsePlugin

The JSON response plugin is a plugin that provides three main features:

  • Returns dict or list responses as a JSON object: {“result”: <output>} * If the response is a dict containing either “result” or “error”, the result is returned as-is
  • Catches HTTPResponse exceptions (including the subclass HTTPError) and formats them as a JSON object: {“error”: {“code”: <http response code>, “message”: <exception message>}}
  • Provides an error handler that can be used to replace the standard error handler with one that returns JSON objects * The handler must be manually applied for each error code to each app, except as shown below

## SQLAlchemy

The SQLAlchemy package must be installed, and is NOT a requirement of this package as a whole! Make sure it is installed or ImportError will be raised.

### Plugin sqlalchemy.SQLAlchemyNotFoundPlugin

The SQLAlchemy not found plugin converts SQLAlchemy not found exceptions to 404s. Apply within the JsonResponsePlugin to turn not found objects into a nicely formatted JSON error message.

### Plugin sqlalchemy.SQLAlchemySession

Given an sqlalchemy engine in the constructor, this plugin creates bottle.request.sa_session that can be used for querying. This results in a new session for each thread/request. The kwarg “autocommit” may also be passed, turning automatic commits on or off (default: True)

## Apps

### Function apps.setup

Set up a collection of apps. The function accepts the following arguments:

  • main_app (required): “main” app on which other apps are mounted
  • sub_apps (optional): List containing either plain application instances (which are not mounted anywhere) or lists containing [app, mountpoint], where the app is mounted to main_app at mountpoint. The main_app is automatically added to this list - do not add it yourself.
  • plugins (optional): list of plugins to install to all apps
  • error_handlers (optional): List containing either error handler callbacks, or lists containing [range, handler] where handler is applied to all error codes in range (default range is 300-599)
  • error_handler_generators (optional): List containing either methods that generate error handler callbacks, or lists containing [range, handler_generator] where handler_generator(code) is applied to all error codes in range (default range is 300-599)
error_handler_generators can be used to apply the JSON response error handler:
setup(mainapp, [otherapp], error_handler_generators = [JsonResponsePlugin.getErrorHandler])

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