tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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access-control-basic-preflight-cache.py (1798B)

      1 from wptserve.utils import isomorphic_encode
      2 
      3 def main(request, response):
      4    def fail(message):
      5        response.content = b"FAIL " + isomorphic_encode(request.method) + b": " + message
      6        response.status = 400
      7 
      8    def getState(token):
      9        server_state = request.server.stash.take(token)
     10        if not server_state:
     11            return b"Uninitialized"
     12        return server_state
     13 
     14    def setState(state, token):
     15        request.server.stash.put(token, state)
     16 
     17    response.headers.set(b"Access-Control-Allow-Origin", request.headers.get(b"origin"))
     18    response.headers.set(b"Access-Control-Allow-Credentials", b"true")
     19    token = request.GET.first(b"token", None)
     20    state = getState(token)
     21 
     22    if state == b"Uninitialized":
     23        if request.method == u"OPTIONS":
     24            response.headers.set(b"Access-Control-Allow-Methods", b"PUT")
     25            response.headers.set(b"Access-Control-Max-Age", 10)
     26            setState(b"OPTIONSSent", token)
     27        else:
     28            fail(state)
     29    elif state == b"OPTIONSSent":
     30        if request.method == u"PUT":
     31            response.content = b"PASS: First PUT request."
     32            setState(b"FirstPUTSent", token)
     33        else:
     34            fail(state)
     35    elif state == b"FirstPUTSent":
     36        if request.method == u"PUT":
     37            response.content = b"PASS: Second PUT request. Preflight worked."
     38        elif request.method == u"OPTIONS":
     39            response.headers.set(b"Access-Control-Allow-Methods", b"PUT")
     40            setState(b"FAILSecondOPTIONSSent", token)
     41        else:
     42            fail(state)
     43    elif state == b"FAILSecondOPTIONSSent":
     44        if request.method == u"PUT":
     45            fail(b"Second OPTIONS request was sent. Preflight failed.")
     46        else:
     47            fail(state)
     48    else:
     49        fail(state)