sanic/docs/sanic/request_data.md

Request Data

When an endpoint receives a HTTP request, the route function is passed a Request object.

The following variables are accessible as properties on Request objects:

• json (any) - JSON body

  from sanic.response import json
  
  @app.route("/json")
  def post_json(request):
      return json({ "received": True, "message": request.json })
  

• args (dict) - Query string variables. A query string is the section of a URL that resembles ?key1=value1&key2=value2. If that URL were to be parsed, the args dictionary would look like {'key1': ['value1'], 'key2': ['value2']}. The request's query_string variable holds the unparsed string value.

  from sanic.response import json
  
  @app.route("/query_string")
  def query_string(request):
      return json({ "parsed": True, "args": request.args, "url": request.url, "query_string": request.query_string })
  

• raw_args (dict) - On many cases you would need to access the url arguments in a less packed dictionary. For same previous URL ?key1=value1&key2=value2, the raw_args dictionary would look like {'key1': 'value1', 'key2': 'value2'}.

• files (dictionary of File objects) - List of files that have a name, body, and type

  from sanic.response import json
  
  @app.route("/files")
  def post_json(request):
      test_file = request.files.get('test')
  
      file_parameters = {
          'body': test_file.body,
          'name': test_file.name,
          'type': test_file.type,
      }
  
      return json({ "received": True, "file_names": request.files.keys(), "test_file_parameters": file_parameters })
  

• form (dict) - Posted form variables.

  from sanic.response import json
  
  @app.route("/form")
  def post_json(request):
      return json({ "received": True, "form_data": request.form, "test": request.form.get('test') })
  

• body (bytes) - Posted raw body. This property allows retrieval of the request's raw data, regardless of content type.

  from sanic.response import text
  
  @app.route("/users", methods=["POST",])
  def create_user(request):
      return text("You are trying to create a user with the following POST: %s" % request.body)
  

• ip (str) - IP address of the requester.

• app - a reference to the Sanic application object that is handling this request. This is useful when inside blueprints or other handlers in modules that do not have access to the global app object.

  from sanic.response import json
  from sanic import Blueprint
  
  bp = Blueprint('my_blueprint')
  
  @bp.route('/')
  async def bp_root(request):
      if request.app.config['DEBUG']:
          return json({'status': 'debug'})
      else:
          return json({'status': 'production'})
  
  

• url: The full URL of the request, ie: http://localhost:8000/posts/1/?foo=bar

• scheme: The URL scheme associated with the request: http or https

• host: The host associated with the request: localhost:8080

• path: The path of the request: /posts/1/

• query_string: The query string of the request: foo=bar or a blank string ''

• uri_template: Template for matching route handler: /posts/<id>/

Accessing values using get and getlist

The request properties which return a dictionary actually return a subclass of dict called RequestParameters. The key difference when using this object is the distinction between the get and getlist methods.

• get(key, default=None) operates as normal, except that when the value of the given key is a list, only the first item is returned.
• getlist(key, default=None) operates as normal, returning the entire list.

from sanic.request import RequestParameters

args = RequestParameters()
args['titles'] = ['Post 1', 'Post 2']

args.get('titles') # => 'Post 1'

args.getlist('titles') # => ['Post 1', 'Post 2']