#
# This file contains global functions for formatting and printing data. This
# file should be imported into individual log-parsing scripts located in
-# logs/*. Data is all formatted in HTML. Writing to disk and/or emailng data
-# is left to __main__.py.
+# logs/*. Data is formatted in HTML or plaintext. Writing to disk and/or
+# emailng data is left to __main__.py.
#
import os
import re
import locale
from string import Template
+from math import floor, ceil
+from tabulate import tabulate
import logparse
-from . import interface, util, config
+from . import interface, util, config, mail
import logging
logger = logging.getLogger(__name__)
+
locale.setlocale(locale.LC_ALL, '') # inherit system locale
#DEG = "°".encode('unicode_escape')
DEG = u'\N{DEGREE SIGN}'
CORNERCHARS_SINGLE = ['└', '┘', '┐', '┌']
LINECHARS_DOUBLE = ['║', '═']
LINECHARS_SINGLE = ['│', '─']
+JXNCHARS_DOUBLE = ['╠', '╣', '╦', '╩', '╬']
+JXNCHARS_SINGLE = ['├', '┤', '┬', '┴', '┼']
+BULLET = "• "
+INDENT = " "
+
class Output:
+ """
+ Base class for a data processor.
+ """
def __init__(self):
self.content = ""
self.destination = ""
def append(self, content):
+ """
+ Add a string
+ """
self.content += content
def write(self, destination=""):
+ """
+ Output contents into a file
+ """
if destination == "":
destination = self.destination
if destination == "":
class PlaintextOutput(Output):
+ """
+ Processes & outputs data in a plaintext form which can be read with cat or plaintext email.
+ """
def __init__(self, linewidth=80):
self.content = ""
self.linewidth = linewidth;
def append_header(self, template=''):
+ """
+ Print details with some primitive formatting
+ """
init_varfilter()
box = PlaintextBox(content=Template("$title $version on $hostname\n\n$time $date").safe_substitute(varsubst), vpadding=2, hpadding="\t\t", linewidth=config.prefs['linewidth'])
line = PlaintextLine(self.linewidth)
self.append(box.draw() + line.draw())
def append_footer(self):
+ """
+ Append a horizontal line and some details
+ """
init_varfilter()
self.append(PlaintextLine(self.linewidth, vpadding=1).draw())
self.append(Template("$hostname $time $date").safe_substitute(varsubst))
def append_section(self, section):
+ """
+ Call the appropriate methods to format a section (provided by a parser).
+ This should be run by interface.py after every instance of parse_log().
+ """
self.append(PlaintextBox(content=section.title, double=False, fullwidth=False, vpadding=0, hpadding=" ").draw())
self.append('\n'*2)
for data in section.data:
self.append(self._fmt_data(data.subtitle, data.items))
- self.append('\n')
+ self.append('\n')
+ for table in section.tables:
+ self.append(table.draw_plain())
+ self.append("\n")
def _fmt_data(self, subtitle, data = None): # write title and data
+ """
+ Format the properties of a data object into usable plaintext form with a few fancy symbols/formatting tricks.
+ Subtitle is required, data is not. If only subtitle is supplied or subtitle + one data item, a single line will be printed.
+ """
if (subtitle == ""):
logger.warning("No subtitle provided.. skipping section")
return
else:
itemoutput = subtitle + '\n'
for datum in data:
- datum = '• ' + datum
- if len(datum) > config.prefs['linewidth']:
+ datum = BULLET + datum
+ if len(datum) > config.prefs['linewidth'] - 3:
words = datum.split()
- if max(map(len, words)) > config.prefs['linewidth']:
- raise ValueError("Content width is too small")
+ if max(map(len, words)) > config.prefs['linewidth'] - len(INDENT):
+ continue
res, part, others = [], words[0], words[1:]
for word in others:
- if len(' ') + len(word) > config.prefs['linewidth'] - len(part):
+ if 1 + len(word) > config.prefs['linewidth'] - len(part):
res.append(part)
part = word
else:
part += ' ' + word
if part:
res.append(part)
- datum = '\n'.join(res)
+ datum = ('\n ').join(res)
+ datum = INDENT + datum
itemoutput += datum + '\n'
return itemoutput
-
class HtmlOutput(Output):
+ """
+ Process and output data in HTML format.
+ All HTML formatting functions now reside in this class to differentiate them from plaintext.
+ """
def __init__(self):
self.content = ""
self.css = ""
def embed_css(self, css):
+ """
+ Convert stylesheet to inline tags
+ """
self.content = mail.mailprep(self.content, css)
+ return self.content
- def append_header(self, template): # insert variables into header template file
+ def append_header(self, template):
+ """
+ Insert variables into header template file and append HTML tags
+ """
init_varfilter()
headercontent = Template(open(template, 'r').read())
self.append(headercontent.safe_substitute(varsubst))
self.append(opentag('div', id='main'))
def append_footer(self):
+ """
+ Close HTML tags that were opened in the template.
+ TODO: add footer template similar to header template.
+ """
self.append(closetag('div') + closetag('body') + closetag('html'))
def append_section(self, section):
+ """
+ Call the appropriate methods to generate HTML tags for a section (provided by a parser).
+ This should be run by interface.py after every instance of parse_log().
+ """
self.append(opentag('div', 1, section.title, 'section'))
self.append(self._gen_title(section.title))
for data in section.data:
self.append(self._fmt_data(data.subtitle, data.items))
+ for table in section.tables:
+ self.append(table.draw_html())
self.append(closetag('div', 1))
- def _gen_title(self, title): # write title for a section
+ def _gen_title(self, title):
+ """
+ Format the title for a section
+ """
if (title == '' or '\n' in title):
logger.error("Invalid title")
raise ValueError
logger.debug("Writing title for " + title)
- return tag('h2', 0, title)
+ return tag('h2', False, title)
- def _fmt_data(self, subtitle, data = None): # write title and data
+ def _fmt_data(self, subtitle, data = None):
+ """
+ Format the properties of a data object into usable HTML tags.
+ Subtitle is required, data is not. If only subtitle is supplied or subtitle + one data item, a single line will be printed.
+ """
if (subtitle == ""):
logger.warning("No subtitle provided.. skipping section")
return
if (data == None or len(data) == 0):
logger.debug("No data provided.. just printing subtitle")
- return tag('p', 0, subtitle)
+ return tag('p', False, subtitle)
else:
logger.debug("Received data " + str(data))
subtitle += ':'
if (len(data) == 1):
- return tag('p', 0, subtitle + ' ' + data[0])
+ return tag('p', False, subtitle + ' ' + data[0])
else:
output = ""
- output += tag('p', 0, subtitle)
+ output += tag('p', False, subtitle)
output += opentag('ul', 1)
coderegex = re.compile('`(.*)`')
for datum in data:
if datum == "" or datum == None:
continue
- datum = coderegex.sub(r'<code>{\1}</code>', str(datum))
- output += tag('li', 0, datum)
- output += closetag('ul', 1)
+ datum = coderegex.sub(r"<code>\1</code>", str(datum))
+ output += tag('li', False, datum)
+ output += closetag('ul', True)
return output
class Section:
+ """
+ Each parser should output a Section() which contains the title and returned data.
+ """
def __init__(self, title):
self.title = title
self.data = []
+ self.tables = []
- def add_data(self, data):
+ def append_data(self, data):
self.data.append(data)
+ def append_table(self, table):
+ self.tables.append(table)
+
+
class Data:
+ """
+ Each section (parser) can have one or more Data() objects which are essentially glorified lists.
+ """
- def __init__(self, subtitle, items=None):
+ def __init__(self, subtitle="", items=[]):
self.subtitle = subtitle
self.items = items
+ def truncl(self, limit): # truncate list
+ """
+ Truncate self.items to a specified value and state how many items are hidden.
+ """
+ if (len(self.items) > limit):
+ more = str(len(self.items) - limit)
+ self.items = self.items[:limit]
+ self.items.append("+ {0} more".format(more))
+
+ def orderbyfreq(self):
+ """
+ Order a list by frequency of each item, then remove duplicates and append frequency in parentheses.
+ """
+ unsorted = list(self.items)
+ self.items = ["{0} ({1})".format(y, unsorted.count(y)) for y in sorted(set(unsorted), key = lambda x: -unsorted.count(x))]
+
+class Table(object):
+ """
+ A wrapper for python-tabulate's Tabulate type.
+ """
+
+ def __init__(self, double=False, borders=False, hpadding=" ", maxwidth=80, headers=[]):
+ self.rows = [] # List of row objects
+ self.keymap = {} # For fast lookup of row by value of first column
+ self.double = double
+ self.borders = borders
+ self.align_cols = []
+ self.hpadding = hpadding
+ self.maxwidth = maxwidth
+ self.headers = headers
+ self._align_cols = []
+
+ def add_row(self, row):
+
+ self.rows.append(row)
+ if len(row.columns) > 0:
+ self.keymap[row.columns[0]] = row
+
+ logger.debug("Added row with {0} columns".format(str(len(row.columns))))
+
+ def align_column(self, i, align):
+ while len(self._align_cols) -1 < i:
+ self._align_cols.append("")
+ self._align_cols[i] = align
+ for row in self.rows:
+ row.columns[i].align = align
+ logger.debug("Column alignment is now {0}".format(str(self._align_cols)))
+
+ def _gen_list(self):
+ hierarchy = []
+ for row in self.rows:
+ row_data = []
+ for column in row.columns:
+ row_data.append(column.content)
+ hierarchy.append(row_data)
+ return hierarchy
+
+ def draw_html(self):
+ output = tabulate(self._gen_list(), self.headers, tablefmt="html", colalign=tuple(self._align_cols))
+ return output
+
+ def draw_plain(self):
+ output = tabulate(self._gen_list(), self.headers, tablefmt="fancy_grid" if self.borders else "plain", colalign=tuple(self._align_cols))
+ return output
+
+
+class Table0(object):
+ """
+ A two-dimensional information display.
+ This is a hacky implementation - Table() now relies on the Tabulate package which is much more reliable.
+ """
+
+ def __init__(self, double=False, borders=True, hpadding="+", maxwidth=80):
+ self.rows = [] # List of row objects
+ self.keymap = {} # For fast lookup of row by value of first column
+ self.double = double
+ self.borders = borders
+ self.align_cols = []
+ self.hpadding = hpadding
+ self.maxwidth = maxwidth
+ self._colwidths = []
+
+ def add_row(self, row):
+ self.rows.append(row)
+ for i, col in enumerate(row.columns):
+ if len(self._colwidths) >= i + 1:
+ self._colwidths[i] = max([self._colwidths[i], len(col.content)])
+ else:
+ self._colwidths.append(len(col.content))
+ logger.debug("Added row with {0} columns. Column widths are now {1}.".format(str(len(row.columns)), str(self._colwidths)))
+ if len(row.columns) > 0:
+ self.keymap[row.columns[0]] = row
+
+ def align_column(self, i, align):
+ for row in self.rows:
+ row.columns[i].align = align
+
+
+ def draw_html(self):
+ output = ""
+ output += opentag("table", True, cl="data_table")
+ for row in self.rows:
+ if row.header:
+ output += opentag("th", block=True, cl="header")
+ else:
+ output += opentag("tr", block=True)
+ for column in row.columns:
+ output += tag("td", content=column.content, style={"text-align": column.align} if column.align else {})
+ if row.header:
+ output += closetag("th", True)
+ else:
+ output += closetag("tr", True)
+ output += closetag("table", True)
+ logger.debug("Built table with {0} rows and {1} columns".format(str(len(self.rows)), str(max([x.n for x in self.rows]))))
+ return output
+
+ def draw_plain(self):
+ output = ""
+ cols = [list(x) for x in zip(self.rows)]
+ logger.debug("Cols are " + str(cols))
+
+ if self.double == True:
+ cornerchars = CORNERCHARS_DOUBLE
+ linechars = LINECHARS_DOUBLE
+ jxnchars = JXNCHARS_DOUBLE
+ else:
+ cornerchars = CORNERCHARS_SINGLE
+ linechars = LINECHARS_SINGLE
+ jxnchars = JXNCHARS_SINGLE
+
+ lengths = []
+ row_lengths = []
+ for row in self.rows:
+ for i, col in enumerate(row.columns):
+ if len(lengths) >= i + 1:
+ lengths[i] = max([lengths[i], len(col.content)])
+ else:
+ lengths.append(len(col.content))
+
+ logger.debug("Lengths are " + str(lengths))
+
+ for i, row in enumerate(self.rows):
+ l = (len(INDENT) + len(self.hpadding)*2*len(row.columns) + ((1+len(row.columns)) if self.borders else 0) + sum([len(col.content) for col in row.columns]))
+ if l > self.maxwidth:
+ logger.debug("Line overflow for cell in row {0} of table".format(str(i)))
+ words = row.columns[-1].content.split()
+ if max(map(len, words)) > self.maxwidth:
+ continue
+ res, part, others = [], words[0], words[1:]
+ for word in others:
+ if l - len(word) < self.maxwidth:
+ res.append(part)
+ part = word
+ else:
+ part += ' ' + word
+ if part:
+ res.append(part)
+ self._colwidths[-1] = max([len(f) for f in res] + [len(r.columns[-1].content) for r in self.rows if r != row])
+ if self.borders:
+ row.columns[-1].content = res[0][:-1] + self.hpadding + " "*(self._colwidths[-1]-len(res[0])+1) + linechars[0]
+ for fragment in res[1:]:
+ row.columns[-1].content += "\n" + INDENT + "".join([(linechars[0] + self.hpadding + " "*x + self.hpadding) for x in lengths]) + linechars[0] + self.hpadding + fragment + " " * (max(self._colwidths) - len(fragment))
+
+ if self.borders:
+ top = INDENT + cornerchars[3] + jxnchars[2].join(linechars[1] * (l+2) for l in self._colwidths) + cornerchars[2] + "\n"
+ bottom = INDENT + cornerchars[0] + jxnchars[3].join(linechars[1] * (l+2) for l in self._colwidths) + cornerchars[1] + "\n"
+ rowtext = INDENT + linechars[0] + linechars[0].join("{:>%d}" % l for l in self._colwidths) + linechars[0] + "\n"
+ line = INDENT + jxnchars[0] + jxnchars[4].join(linechars[1] * (l+2) for l in self._colwidths) + jxnchars[1] + "\n"
+ else:
+ top = bottom = line = ""
+ rowtext = " ".join("{:>%d}" % l for l in self._colwidths) + "\n"
+
+ for i, row in enumerate(self.rows):
+ logger.debug("Processing row {0} of {1}".format(str(i), str(len(self.rows)-1)))
+ row_output = ""
+ if i == 0:
+ row_output += top
+ row_output += (INDENT + linechars[0] if self.borders else "")
+ for j, column in enumerate(row.columns):
+ if column.align == "right":
+ cell_output = self.hpadding + " "*(self._colwidths[j]-len(column.content)) + column.content + self.hpadding + (linechars[0] if self.borders else "")
+ elif column.align == "left":
+ cell_output = self.hpadding + column.content + " "*(self._colwidths[j]-len(column.content)) + self.hpadding + (linechars[0] if self.borders else "")
+ elif column.align == "center":
+ n_whitespace = (self._colwidths[j]-len(column.content))/2
+ cell_output = self.hpadding + " "*(floor(n_whitespace) if len(column.content) % 2 == 0 else ceil(n_whitespace)) + column.content + " "*(ceil(n_whitespace) if len(column.content) % 2 == 0 else floor(n_whitespace)) + self.hpadding + (linechars[0] if self.borders else "")
+ else:
+ logger.warning("Couldn't find alignment value for cell {0} of row {1} with content \"{2}\"".format(str(j), str(i), column.content()))
+ continue
+ row_output += cell_output
+ if len(row_output) > self.maxwidth:
+ logger.warning("Line overflow for row {0} of table".format(str(i)))
+
+ output += row_output + "\n"
+ if i == len(self.rows)-1:
+ output += (bottom if self.borders else "")
+ else:
+ output += (line if self.borders else "")
+
+ return output
+
+class Row(object):
+
+ def __init__(self, columns=[], header=False):
+ self.columns = columns
+ self.header = header
+ self.n = len(self.columns)
+
+ def add_column(self, column):
+ self.columns.append(column)
+ self.n += 1
+
+ def rm_column(self, column):
+ self.remove(column)
+ self.n -= 1
+
+class Column(object):
+
+ def __init__(self, content="", align="right"):
+ self.content = content
+ self.align = align
class PlaintextLine:
+ """
+ Draw a horizontal line for plain text format, with optional padding/styling.
+ """
def __init__(self, linewidth=80, double=True, vpadding=1, hpadding=""):
self.linewidth = linewidth
line = (LINECHARS_DOUBLE[1] if self.double else LINECHARS_SINGLE[1])
return "\n" * self.vpadding + self.hpadding + line * (self.linewidth - 2 * len(self.hpadding)) + self.hpadding + "\n" * self.vpadding
+
class PlaintextBox:
+ """
+ Draw a rectangular box around text, with customisable padding/size/style
+ """
def __init__(self, content="", double=True, fullwidth=True, linewidth=80, hpadding="\t", vpadding=1):
self.content = content
if len(line) > contentwidth:
words = line.split()
if max(map(len, words)) > contentwidth:
- raise ValueError("Content width is too small")
+ continue
res, part, others = [], words[0], words[1:]
for word in others:
if len(' ') + len(word) > contentwidth - len(part):
contentlines.append(cornerchars[0] + linechars[1] * (contentwidth + len(self.hpadding)*2) + cornerchars[1])
return ('\n').join(contentlines)
+
def init_varfilter():
global varfilter
global varpattern
varpattern = re.compile("|".join(varfilter.keys()))
varsubst = dict(title=config.prefs['title'], date=interface.start.strftime(DATEFMT), time=interface.start.strftime(TIMEFMT), hostname=util.hostname(config.prefs['hostname-path']), version=logparse.__version__, css=os.path.relpath(config.prefs['css'], os.path.dirname(config.prefs['output'])))
-def writetitle(title): # write title for a section
- if (title == '' or '\n' in title):
- logger.error("Invalid title")
- raise ValueError
- logger.debug("Writing title for " + title)
- return tag('h2', 0, title)
-
-def opentag(tag, block = 0, id = None, cl = None): # write html opening tag
- output = ""
- if (block):
- output += '\n'
- output += '<' + tag
- if (id != None):
- output += " id='" + id + "'"
- if (cl != None):
- output += " class='" + cl + "'"
- output += '>'
- if (block):
- output += '\n'
- return output
-
-def closetag(tag, block = 0): # write html closing tag
- if (block == 0):
- return "</" + tag + ">"
- else:
- return "\n</" + tag + ">\n"
-
-def tag(tag, block = 0, content = ""): # write html opening tag, content, and html closing tag
- o = opentag(tag, block)
- c = closetag(tag, block)
- return o + content + c
+def backticks(l):
+ return ["`" + x + "`" for x in l]
-def orderbyfreq(l): # order a list by the frequency of its elements and remove duplicates
- temp_l = l[:]
- l = list(set(l))
- l = [[i, temp_l.count(i)] for i in l] # add count of each element
- l.sort(key=lambda x:temp_l.count(x[0])) # sort by count
- l = [i[0] + ' (' + str(i[1]) + ')' for i in l] # put element and count into string
- l = l[::-1] # reverse
- return l
-
-def addtag(l, tag): # add prefix and suffix tags to each item in a list
- l2 = ['<' + tag + '>' + i + '</' + tag + '>' for i in l]
- return l2
-
-def truncl(input, limit): # truncate list
- if (len(input) > limit):
- more = str(len(input) - limit)
- output = input[:limit]
- output.append("+ " + more + " more")
- return(output)
- else:
- return(input)
-def plural(noun, quantity): # return "1 noun" or "n nouns"
+def plural(noun, quantity):
+ """
+ Return "1 noun" or "n nouns"
+ """
if (quantity == 1):
return(str(quantity) + " " + noun)
else:
return(str(quantity) + " " + noun + "s")
-def parsesize(num, suffix='B'): # return human-readable size from number of bytes
+
+def parsesize(num, suffix='B'):
+ """
+ Return human-readable size from number of bytes
+ """
for unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']:
if abs(num) < 1024.0:
return "%3.1f %s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', suffix)
-def fsubject(template): # Replace variables in the title template provided in config
+
+def fsubject(template):
+ """
+ Replace variables in the title template provided in config
+ """
r = varpattern.sub(lambda m: varfilter[re.escape(m.group(0))], template)
logger.debug("Returning subject line " + r)
return r
-def writedata(subtitle, data = None): # write title and data
- if (subtitle == ""):
- logger.warning("No subtitle provided.. skipping section")
- return
+def opentag(tag, block=False, id=None, cl=None, style=None):
+ """
+ Write HTML opening tag
+ """
+ output = ""
+ if block:
+ output += '\n'
+ output += '<' + tag
+ if id:
+ output += " id='" + id + "'"
+ if cl:
+ output += " class='" + cl + "'"
+ if style:
+ output += " style='"
+ output += " ".join("{0}: {1};".format(attr, value) for attr, value in style.items())
+ output += "'"
+ output += '>'
+ if block:
+ output += '\n'
+ return output
- if (data == None or len(data) == 0):
- logger.debug("No data provided.. just printing subtitle")
- return tag('p', 0, subtitle)
+def closetag(tag, block=False):
+ """
+ Write HTML closing tag
+ """
+ if block:
+ return "\n</" + tag + ">\n"
else:
- logger.debug("Received data " + str(data))
- subtitle += ':'
- if (len(data) == 1):
- return tag('p', 0, subtitle + ' ' + data[0])
- else:
- output = ""
- output += tag('p', 0, subtitle)
- output += opentag('ul', 1)
- for datum in data:
- output += tag('li', 0, datum)
- output += closetag('ul', 1)
- return output
+ return "</" + tag + ">"
+
+def tag(tag, block=False, content="", id=None, cl=None, style=None):
+ """
+ Write HTML opening tag, content, and closing tag
+ """
+ o = opentag(tag, block, id, cl, style)
+ c = closetag(tag, block)
+ return o + content + c