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"""
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Contains helpers for interacting with the console. Includes definition for the
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class that is used to run the console.
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"""
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import cmd2
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import re
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import string
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import sys
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from .util import PappyException
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from twisted.internet import defer
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###################
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## Helper functions
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def print_pappy_errors(func):
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def catch(*args, **kwargs):
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try:
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func(*args, **kwargs)
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except PappyException as e:
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print str(e)
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return catch
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@defer.inlineCallbacks
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def load_reqlist(line, allow_special=True):
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"""
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load_reqlist(line, allow_special=True)
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A helper function for parsing a list of requests that are passed as an
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argument. If ``allow_special`` is True, then it will parse IDs such as
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``u123`` or ``s123``. Even if allow_special is false, it will still parse
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``m##`` IDs. Will print any errors with loading any of the requests and
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will return a list of all the requests which were successfully loaded.
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Returns a deferred.
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:Returns: Twisted deferred
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"""
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from .http import Request
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# Parses a comma separated list of ids and returns a list of those requests
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# prints any errors
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ids = re.split(',\s*', line)
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reqs = []
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for reqid in ids:
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try:
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req = yield Request.load_request(reqid, allow_special)
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reqs.append(req)
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except PappyException as e:
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print e
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defer.returnValue(reqs)
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def print_table(coldata, rows):
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"""
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Print a table.
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Coldata: List of dicts with info on how to print the columns.
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``name`` is the heading to give column,
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``width (optional)`` maximum width before truncating. 0 for unlimited.
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Rows: List of tuples with the data to print
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"""
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# Get the width of each column
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widths = []
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headers = []
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for data in coldata:
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if 'name' in data:
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headers.append(data['name'])
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else:
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headers.append('')
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empty_headers = True
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for h in headers:
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if h != '':
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empty_headers = False
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if not empty_headers:
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rows = [headers] + rows
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for i in range(len(coldata)):
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col = coldata[i]
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if 'width' in col and col['width'] > 0:
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maxwidth = col['width']
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else:
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maxwidth = 0
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colwidth = 0
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for row in rows:
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printstr = str(row[i])
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if len(printstr) > colwidth:
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colwidth = len(printstr)
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if maxwidth > 0 and colwidth > maxwidth:
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widths.append(maxwidth)
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else:
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widths.append(colwidth)
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# Print rows
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padding = 2
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for row in rows:
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for (col, width) in zip(row, widths):
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printstr = str(col)
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if len(printstr) > width:
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for i in range(len(printstr)-4, len(printstr)-1):
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printstr=printstr[:width]
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printstr=printstr[:-3]+'...'
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sys.stdout.write(printstr)
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sys.stdout.write(' '*(width-len(printstr)))
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sys.stdout.write(' '*padding)
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sys.stdout.write('\n')
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sys.stdout.flush()
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def print_requests(requests):
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"""
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Takes in a list of requests and prints a table with data on each of the
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requests. It's the same table that's used by ``ls``.
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"""
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# Print a table with info on all the requests in the list
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cols = [
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{'name':'ID'},
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{'name':'Verb'},
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{'name': 'Host'},
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{'name':'Path', 'width':40},
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{'name':'S-Code'},
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{'name':'Req Len'},
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{'name':'Rsp Len'},
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{'name':'Time'},
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{'name':'Mngl'},
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]
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rows = []
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for request in requests:
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rid = request.reqid
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method = request.verb
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if 'host' in request.headers:
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host = request.headers['host']
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else:
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host = '??'
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path = request.full_path
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reqlen = len(request.body)
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rsplen = 'N/A'
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mangle_str = '--'
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if request.unmangled:
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mangle_str = 'q'
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if request.response:
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response_code = str(request.response.response_code) + \
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' ' + request.response.response_text
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rsplen = len(request.response.body)
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if request.response.unmangled:
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if mangle_str == '--':
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mangle_str = 's'
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else:
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mangle_str += '/s'
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else:
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response_code = ''
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time_str = '--'
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if request.time_start and request.time_end:
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time_delt = request.time_end - request.time_start
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time_str = "%.2f" % time_delt.total_seconds()
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rows.append([rid, method, host, path, response_code,
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reqlen, rsplen, time_str, mangle_str])
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print_table(cols, rows)
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def confirm(message, default='n'):
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"""
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A helper function to get confirmation from the user. It prints ``message``
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then asks the user to answer yes or no. Returns True if the user answers
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yes, otherwise returns False.
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"""
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if 'n' in default.lower():
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default = False
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else:
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default = True
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print message
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if default:
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answer = raw_input('(Y/n) ')
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else:
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answer = raw_input('(y/N) ')
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if not answer:
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return default
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if answer[0].lower() == 'y':
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return True
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else:
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return False
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##########
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## Classes
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class ProxyCmd(cmd2.Cmd):
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"""
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An object representing the console interface. Provides methods to add
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commands and aliases to the console.
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"""
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def __init__(self, *args, **kwargs):
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self.prompt = 'pappy> '
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self.debug = True
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self._cmds = {}
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self._aliases = {}
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cmd2.Cmd.__init__(self, *args, **kwargs)
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def __dir__(self):
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# Hack to get cmd2 to detect that we can run a command
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ret = set(dir(self.__class__))
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ret.update(self.__dict__.keys())
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ret.update(['do_'+k for k in self._cmds.keys()])
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ret.update(['help_'+k for k in self._cmds.keys()])
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ret.update(['complete_'+k for k, v in self._cmds.iteritems() if self._cmds[k][1]])
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for k, v in self._aliases.iteritems():
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ret.add('do_' + k)
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ret.add('help_' + k)
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if self._cmds[self._aliases[k]][1]:
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ret.add('complete_'+k)
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return sorted(ret)
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def __getattr__(self, attr):
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def gen_helpfunc(func):
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def f():
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if not func.__doc__:
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to_print = 'No help exists for function'
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lines = func.__doc__.splitlines()
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if len(lines) > 0 and lines[0] == '':
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lines = lines[1:]
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if len(lines) > 0 and lines[-1] == '':
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lines = lines[-1:]
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to_print = '\n'.join(string.lstrip(l) for l in lines)
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print to_print
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return f
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if attr.startswith('do_'):
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command = attr[3:]
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if command in self._cmds:
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return print_pappy_errors(self._cmds[command][0])
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elif command in self._aliases:
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real_command = self._aliases[command]
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if real_command in self._cmds:
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return print_pappy_errors(self._cmds[real_command][0])
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elif attr.startswith('help_'):
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command = attr[5:]
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if command in self._cmds:
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return gen_helpfunc(self._cmds[command][0])
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elif command in self._aliases:
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real_command = self._aliases[command]
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if real_command in self._cmds:
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return gen_helpfunc(self._cmds[real_command][0])
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elif attr.startswith('complete_'):
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command = attr[9:]
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if command in self._cmds:
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if self._cmds[command][1]:
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return self._cmds[command][1]
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elif command in self._aliases:
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real_command = self._aliases[command]
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if real_command in self._cmds:
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if self._cmds[real_command][1]:
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return self._cmds[real_command][1]
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raise AttributeError(attr)
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def get_names(self):
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# Hack to get cmd to recognize do_/etc functions as functions for things
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# like autocomplete
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return dir(self)
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def set_cmd(self, command, func, autocomplete_func=None):
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"""
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Add a command to the console.
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"""
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self._cmds[command] = (func, autocomplete_func)
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def set_cmds(self, cmd_dict):
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"""
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Set multiple commands from a dictionary. Format is:
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{'command': (do_func, autocomplete_func)}
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Use autocomplete_func=None for no autocomplete function
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"""
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for command, vals in cmd_dict.iteritems():
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do_func, ac_func = vals
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self.set_cmd(command, do_func, ac_func)
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def add_alias(self, command, alias):
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"""
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Add an alias for a command.
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ie add_alias("foo", "f") will let you run the 'foo' command with 'f'
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"""
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self._aliases[alias] = command
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def add_aliases(self, alias_list):
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"""
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Pass in a list of tuples to add them all as aliases.
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ie add_aliases([('foo', 'f'), ('foo', 'fo')]) will add 'f' and 'fo' as
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aliases for 'foo'
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"""
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for command, alias in alias_list:
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self.add_alias(command, alias)
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