Example – Handling POST¶
The route
decorator supports a methods
keyword which is the list of HTTP methods as strings.
For example, methods=['POST']
will cause the handler to be invoked when an POST
request is received.
If a handler can support multiple methods the current method can be distinguished with request.method
.
Here is our "Hello, world!"
example extended to support setting the name we are saying Hello to via a POST
request with a name
argument.
This also demonstrates the use of the redirect method of the request to redirect back to '/'
after handling the POST
.
The most specific handler should be defined first.
So the POST
handler must be defined before the handler with no methods
.
from twisted.internet.defer import succeed
from klein import run, route
name = b"world"
@route("/", methods=["POST"])
def setname(request):
global name
name = request.args.get(b'name', [b'world'])[0]
request.redirect('/')
return succeed(None)
@route('/')
def hello(request):
return b"Hello, %s!" % (name,)
run("localhost", 8080)
The following curl command can be used to test this behaviour:
curl -v -L -d name='bob' http://localhost:8080/
Accessing the request content¶
To read the content of the request use the read
method of
IRequest.content
from klein import run, route
import json
@route('/', methods=['POST'])
def do_post(request):
content = json.loads(request.content.read())
response = json.dumps(dict(the_data=content), indent=4)
return response
run("localhost", 8080)
The following curl command can be used to test this behaviour:
curl -XPOST -v -H 'Content-Type: appliction/json' -d '{"name":"bob"}' http://localhost:8080/