import sys, os
from netlib import tcp, http
import netlib.utils
import rparse, utils

class PathocError(Exception): pass


class Pathoc(tcp.TCPClient):
    def __init__(self, host, port):
        tcp.TCPClient.__init__(self, host, port)
        self.settings = dict(
            staticdir = os.getcwd(),
            unconstrained_file_access = True,
        )

    def request(self, spec):
        """
            Return an (httpversion, code, msg, headers, content) tuple.

            May raise rparse.ParseException, netlib.http.HttpError or
            rparse.FileAccessDenied.
        """
        r = rparse.parse_request(self.settings, spec)
        ret = r.serve(self.wfile, None, self.host)
        self.wfile.flush()
        return http.read_response(self.rfile, r.method, None)

    def _show_summary(self, fp, httpversion, code, msg, headers, content):
        print >> fp, "<< %s %s: %s bytes"%(code, utils.xrepr(msg), len(content))

    def _show(self, fp, header, data, hexdump):
        if hexdump:
            print >> fp, "%s (hex dump):"%header
            for line in netlib.utils.hexdump(data):
                print >> fp, "\t%s %s %s"%line
        else:
            print >> fp, "%s (unprintables escaped):"%header
            print >> fp, netlib.utils.cleanBin(data)

    def print_requests(self, reqs, showreq, showresp, explain, hexdump, fp=sys.stdout):
        """
            Performs a series of requests, and prints results to the specified
            file descriptor.

            reqs: A sequence of request specifications
            showreq: Print requests
            showresp: Print responses
            explain: Print request explanation
            hexdump: When printing requests or responses, use hex dump output
        """
        for i in reqs:
            try:
                r = rparse.parse_request(self.settings, i)
                if showreq:
                    self.wfile.start_log()
                req = r.serve(self.wfile, None, self.host)
                if explain:
                    print >> fp, ">> ", req["method"], repr(req["path"])
                    for a in req["actions"]:
                        print >> fp, "\t",
                        for x in a:
                            print >> fp, x,
                        print >> fp
                if showreq:
                    self._show(fp, ">> Request", self.wfile.get_log(), hexdump)
                self.wfile.flush()
                if showresp:
                    self.rfile.start_log()
                resp = http.read_response(self.rfile, r.method, None)
            except rparse.ParseException, v:
                print >> fp, "Error parsing request spec: %s"%v.msg
                print >> fp, v.marked()
                return
            except rparse.FileAccessDenied, v:
                print >> fp, "File access error: %s"%v
                return
            except http.HttpError, v:
                print >> fp, "<< HTTP Error:", v.msg
                if showresp:
                    self._show(fp, "<< Response", self.rfile.get_log(), hexdump)
                return
            except tcp.NetLibTimeout:
                print >> fp, "<<", "Timeout"
                if showresp:
                    self._show(fp, "<< Response", self.rfile.get_log(), hexdump)
                return
            except tcp.NetLibDisconnect: # pragma: nocover
                print >> fp, "<<", "Disconnect"
                return
            else:
                if showresp:
                    self._show(fp, "<< Response", self.rfile.get_log(), hexdump)
                else:
                    self._show_summary(fp, *resp)