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Move common code into a 'tools' file.
Implementation is as similar as possible to the well-tested code in the 1.3.x tree. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8878 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Angus Leeming
parent
c4e43d0557
commit
f907db6a82
@ -1,3 +1,21 @@
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2004-08-09 Angus Leeming <leeming@lyx.org>
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* scripts/lyxpreview_tools.py: move code common to both
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legacy_lyxpreview2ppm.py and lyxpreview2bitmap.py into a separate
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file. The code itself is a straight copy of the implementation
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to be found in the 1.3.x tree. It is much more flexible and powerful
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than the existing code in the 1.4.x tree. It's also better tested.
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* scripts/legacy_lyxpreview2ppm.py: use the code in
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lyxpreview_tools.py. Also use try-except blocks when reading files.
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The code is as similar as possible to that found in the 1.3.x tree,
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differing only in the parsing of the metrics file as 1.4.x requires
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different data.
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* scripts/lyxpreview2bitmap.py: use the code in lyxpreview_tools.py.
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Also use the experience gained in making the 1.3.x code robust to
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wrap arguments to external programs in 'single quotes'.
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2004-07-23 Angus Leeming <leeming@lyx.org>
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* layouts/apa.layout: Patch from Yvonnick Noel. Spell the
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@ -1,68 +1,73 @@
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#! /usr/bin/env python
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# -*- coding: iso-8859-1 -*-
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# file legacy_lyxpreview2ppm.py
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# This file is part of LyX, the document processor.
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# Licence details can be found in the file COPYING.
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# author Angus Leeming
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# Full author contact details are available in file CREDITS
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# This script converts a LaTeX file to a bunch of ppm files using the
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# deprecated dvi->ps->ppm conversion route.
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# with much advice from members of the preview-latex project:
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# David Kastrup, dak@gnu.org and
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# Jan-Åke Larsson, jalar@mai.liu.se.
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# and with much help testing the code under Windows from
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# Paul A. Rubin, rubin@msu.edu.
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# This script takes a LaTeX file and generates a collection of
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# ppm image files, one per previewed snippet.
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# Example usage:
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# legacy_lyxpreview2bitmap.py 0lyxpreview.tex 128 ppm 000000 faf0e6
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# This script takes five arguments:
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# TEXFILE: the name of the .tex file to be converted.
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# SCALEFACTOR: a scale factor, used to ascertain the resolution of the
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# generated image which is then passed to gs.
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# OUTPUTFORMAT: the format of the output bitmap image files.
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# This particular script can produce only "ppm" format output.
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# FG_COLOR: the foreground color as a hexadecimal string, eg '000000'.
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# BG_COLOR: the background color as a hexadecimal string, eg 'faf0e6'.
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# Decomposing TEXFILE's name as DIR/BASE.tex, this script will,
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# if executed successfully, leave in DIR:
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# * a (possibly large) number of image files with names
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# like BASE[0-9]+.ppm
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# * a file BASE.metrics, containing info needed by LyX to position
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# the images correctly on the screen.
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# The script uses several external programs and files:
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# * A latex executable;
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# * preview.sty;
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# * dvips;
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# * gs;
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# * pnmcrop (optional).
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# preview.sty is part of the preview-latex project
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# http://preview-latex.sourceforge.net/
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# Alternatively, it can be obtained from
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# CTAN/support/preview-latex/
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# The script uses the deprecated dvi->ps->ppm conversion route.
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# If possible, please grab 'dvipng'; it's faster and more robust.
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# This legacy support will be removed one day...
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# If you have it then this script will not be invoked by
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# lyxpreview2bitmap.py.
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# Warning: this legacy support will be removed one day...
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import glob, os, re, string, sys
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import pipes, tempfile
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import glob, os, pipes, re, string, sys
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from lyxpreview_tools import copyfileobj, error, find_exe, \
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find_exe_or_terminate, mkstemp, run_command
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# Pre-compiled regular expressions.
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# Pre-compiled regular expression.
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latex_file_re = re.compile("\.tex$")
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def usage(prog_name):
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return "Usage: %s <latex file> <dpi> <fg color> <bg color>\n"\
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return "Usage: %s <latex file> <dpi> ppm <fg color> <bg color>\n"\
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"\twhere the colors are hexadecimal strings, eg 'faf0e6'"\
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% prog_name
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def error(message):
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sys.stderr.write(message + '\n')
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sys.exit(1)
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def find_exe(candidates, path):
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for prog in candidates:
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for directory in path:
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if os.name == "nt":
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full_path = os.path.join(directory, prog + ".exe")
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else:
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full_path = os.path.join(directory, prog)
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if os.access(full_path, os.X_OK):
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return full_path
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return None
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def find_exe_or_terminate(candidates, path):
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exe = find_exe(candidates, path)
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if exe == None:
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error("Unable to find executable from '%s'" % string.join(candidates))
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return exe
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def run_command(cmd):
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handle = os.popen(cmd, 'r')
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cmd_stdout = handle.read()
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cmd_status = handle.close()
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return cmd_status, cmd_stdout
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def extract_metrics_info(log_file, metrics_file):
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metrics = open(metrics_file, 'w')
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@ -73,30 +78,37 @@ def extract_metrics_info(log_file, metrics_file):
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tp_descent = 0.0
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success = 0
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for line in open(log_file, 'r').readlines():
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match = log_re.match(line)
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if match == None:
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continue
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try:
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for line in open(log_file, 'r').readlines():
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match = log_re.match(line)
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if match == None:
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continue
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snippet = (match.group(1) == 'S')
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success = 1
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match = data_re.search(line)
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if match == None:
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error("Unexpected data in %s\n%s" % (log_file, line))
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snippet = (match.group(1) == 'S')
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success = 1
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match = data_re.search(line)
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if match == None:
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error("Unexpected data in %s\n%s" % (log_file, line))
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if snippet:
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ascent = string.atof(match.group(2)) + tp_ascent
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descent = string.atof(match.group(3)) - tp_descent
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if snippet:
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ascent = string.atof(match.group(2)) + tp_ascent
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descent = string.atof(match.group(3)) - tp_descent
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frac = 0.5
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if abs(ascent + descent) > 0.1:
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frac = ascent / (ascent + descent)
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frac = 0.5
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if abs(ascent + descent) > 0.1:
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frac = ascent / (ascent + descent)
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metrics.write("Snippet %s %f\n" % (match.group(1), frac))
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metrics.write("Snippet %s %f\n" % (match.group(1), frac))
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else:
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tp_descent = string.atof(match.group(2))
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tp_ascent = string.atof(match.group(4))
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else:
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tp_descent = string.atof(match.group(2))
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tp_ascent = string.atof(match.group(4))
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except:
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# Unable to open the file, but do nothing here because
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# the calling function will act on the value of 'success'.
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warning('Warning in extract_metrics_info! Unable to open "%s"' % log_file)
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warning(`sys.exc_type` + ',' + `sys.exc_value`)
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return success
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@ -112,102 +124,41 @@ def extract_resolution(log_file, dpi):
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# Default values
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magnification = 1000.0
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fontsize = 0.0
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fontsize = 10.0
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for line in open(log_file, 'r').readlines():
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if found_fontsize and found_magnification:
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break
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try:
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for line in open(log_file, 'r').readlines():
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if found_fontsize and found_magnification:
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break
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if not found_fontsize:
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match = fontsize_re.match(line)
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if match != None:
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match = extract_decimal_re.search(line)
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if match == None:
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error("Unable to parse: %s" % line)
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fontsize = string.atof(match.group(1))
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found_fontsize = 1
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continue
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if not found_fontsize:
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match = fontsize_re.match(line)
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if match != None:
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match = extract_decimal_re.search(line)
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if match == None:
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error("Unable to parse: %s" % line)
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fontsize = string.atof(match.group(1))
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found_fontsize = 1
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continue
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if not found_magnification:
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match = magnification_re.match(line)
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if match != None:
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match = extract_integer_re.search(line)
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if match == None:
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error("Unable to parse: %s" % line)
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magnification = string.atof(match.group(1))
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found_magnification = 1
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continue
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if not found_magnification:
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match = magnification_re.match(line)
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if match != None:
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match = extract_integer_re.search(line)
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if match == None:
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error("Unable to parse: %s" % line)
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magnification = string.atof(match.group(1))
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found_magnification = 1
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continue
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except:
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warning('Warning in extract_resolution! Unable to open "%s"' % log_file)
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warning(`sys.exc_type` + ',' + `sys.exc_value`)
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# This is safe because both fontsize and magnification have
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# non-zero default values.
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return dpi * (10.0 / fontsize) * (1000.0 / magnification)
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def get_version_info():
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version_re = re.compile("([0-9])\.([0-9])")
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match = version_re.match(sys.version)
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if match == None:
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error("Unable to extract version info from 'sys.version'")
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return string.atoi(match.group(1)), string.atoi(match.group(2))
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def copyfileobj(fsrc, fdst, rewind=0, length=16*1024):
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"""copy data from file-like object fsrc to file-like object fdst"""
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if rewind:
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fsrc.flush()
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fsrc.seek(0)
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while 1:
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buf = fsrc.read(length)
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if not buf:
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break
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fdst.write(buf)
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class TempFile:
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"""clone of tempfile.TemporaryFile to use with python < 2.0."""
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# Cache the unlinker so we don't get spurious errors at shutdown
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# when the module-level "os" is None'd out. Note that this must
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# be referenced as self.unlink, because the name TempFile
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# may also get None'd out before __del__ is called.
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unlink = os.unlink
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def __init__(self):
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self.filename = tempfile.mktemp()
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self.file = open(self.filename,"w+b")
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self.close_called = 0
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def close(self):
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if not self.close_called:
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self.close_called = 1
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self.file.close()
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self.unlink(self.filename)
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def __del__(self):
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self.close()
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def read(self, size = -1):
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return self.file.read(size)
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def write(self, line):
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return self.file.write(line)
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def seek(self, offset):
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return self.file.seek(offset)
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def flush(self):
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return self.file.flush()
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def mkstemp():
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"""create a secure temporary file and return its object-like file"""
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major, minor = get_version_info()
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if major >= 2 and minor >= 0:
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return tempfile.TemporaryFile()
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else:
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return TempFile()
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def legacy_latex_file(latex_file, fg_color, bg_color):
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use_preview_re = re.compile("(\\\\usepackage\[[^]]+)(\]{preview})")
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@ -215,19 +166,26 @@ def legacy_latex_file(latex_file, fg_color, bg_color):
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tmp = mkstemp()
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success = 0
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for line in open(latex_file, 'r').readlines():
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match = use_preview_re.match(line)
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if match == None:
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tmp.write(line)
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continue
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try:
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for line in open(latex_file, 'r').readlines():
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match = use_preview_re.match(line)
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if match == None:
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tmp.write(line)
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continue
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success = 1
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tmp.write("%s,dvips,tightpage%s\n\n" \
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"\\AtBeginDocument{\\AtBeginDvi{%%\n" \
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"\\special{!userdict begin/bop-hook{//bop-hook exec\n" \
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"<%s%s>{255 div}forall setrgbcolor\n" \
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"clippath fill setrgbcolor}bind def end}}}\n" \
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% (match.group(1), match.group(2), fg_color, bg_color))
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success = 1
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tmp.write("%s,dvips,tightpage%s\n\n" \
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"\\AtBeginDocument{\\AtBeginDvi{%%\n" \
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"\\special{!userdict begin/bop-hook{//bop-hook exec\n" \
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"<%s%s>{255 div}forall setrgbcolor\n" \
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"clippath fill setrgbcolor}bind def end}}}\n" \
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% (match.group(1), match.group(2), fg_color, bg_color))
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except:
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# Unable to open the file, but do nothing here because
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# the calling function will act on the value of 'success'.
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warning('Warning in legacy_latex_file! Unable to open "%s"' % latex_file)
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warning(`sys.exc_type` + ',' + `sys.exc_value`)
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if success:
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copyfileobj(tmp, open(latex_file,"wb"), 1)
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@ -237,8 +195,8 @@ def legacy_latex_file(latex_file, fg_color, bg_color):
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def crop_files(pnmcrop, basename):
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t = pipes.Template()
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t.append("%s -left" % pnmcrop, '--')
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t.append("%s -right" % pnmcrop, '--')
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t.append('"%s" -left' % pnmcrop, '--')
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t.append('"%s" -right' % pnmcrop, '--')
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for file in glob.glob("%s*.ppm" % basename):
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tmp = mkstemp()
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@ -253,13 +211,16 @@ def legacy_conversion(argv):
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if len(argv) != 6:
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error(usage(argv[0]))
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# Ignore argv[1]
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dir, latex_file = os.path.split(argv[2])
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dir, latex_file = os.path.split(argv[1])
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if len(dir) != 0:
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os.chdir(dir)
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dpi = string.atoi(argv[3])
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dpi = string.atoi(argv[2])
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output_format = argv[3]
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if output_format != "ppm":
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error("This script will generate ppm format images only.")
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fg_color = argv[4]
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bg_color = argv[5]
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@ -275,7 +236,7 @@ def legacy_conversion(argv):
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error("Unable to move color info into the latex file")
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# Compile the latex file.
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latex_call = "%s %s" % (latex, latex_file)
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latex_call = '"%s" "%s"' % (latex, latex_file)
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latex_status, latex_stdout = run_command(latex_call)
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if latex_status != None:
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@ -286,8 +247,8 @@ def legacy_conversion(argv):
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dvi_file = latex_file_re.sub(".dvi", latex_file)
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ps_file = latex_file_re.sub(".ps", latex_file)
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dvips_call = "%s -o %s %s" % (dvips, ps_file, dvi_file)
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dvips_call = '"%s" -o "%s" "%s"' % (dvips, ps_file, dvi_file)
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dvips_status, dvips_stdout = run_command(dvips_call)
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if dvips_status != None:
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error("Failed: %s %s" % (os.path.basename(dvips), dvi_file))
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@ -303,10 +264,10 @@ def legacy_conversion(argv):
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alpha = 2
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# Generate the bitmap images
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gs_call = "%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pnmraw " \
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"-sOutputFile=%s%%d.ppm " \
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"-dGraphicsAlphaBit=%d -dTextAlphaBits=%d " \
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"-r%f %s" \
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gs_call = '"%s" -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pnmraw ' \
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'-sOutputFile="%s%%d.ppm" ' \
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'-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
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'-r%f "%s"' \
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% (gs, latex_file_re.sub("", latex_file), \
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alpha, alpha, resolution, ps_file)
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@ -324,3 +285,7 @@ def legacy_conversion(argv):
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error("Failed to extract metrics info from %s" % log_file)
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return 0
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if __name__ == "__main__":
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legacy_conversion(sys.argv)
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@ -31,9 +31,10 @@
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# lyxpreview2bitmap.py png 0lyxpreview.tex 128 000000 faf0e6
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# This script takes five arguments:
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# FORMAT: either 'png' or 'ppm'. The desired output format.
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# FORMAT: The desired output format. Either 'png' or 'ppm'.
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# TEXFILE: the name of the .tex file to be converted.
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# DPI: a scale factor, passed to dvipng.
|
||||
# DPI: a scale factor, used to ascertain the resolution of the
|
||||
# generated image which is then passed to gs.
|
||||
# FG_COLOR: the foreground color as a hexadecimal string, eg '000000'.
|
||||
# BG_COLOR: the background color as a hexadecimal string, eg 'faf0e6'.
|
||||
|
||||
@ -45,8 +46,12 @@
|
||||
# the images correctly on the screen.
|
||||
|
||||
import glob, os, re, string, sys
|
||||
|
||||
from legacy_lyxpreview2ppm import legacy_conversion
|
||||
|
||||
from lyxpreview_tools import error, find_exe, \
|
||||
find_exe_or_terminate, run_command
|
||||
|
||||
|
||||
# Pre-compiled regular expressions.
|
||||
hexcolor_re = re.compile("^[0-9a-fA-F]{6}$")
|
||||
@ -54,46 +59,11 @@ latex_file_re = re.compile("\.tex$")
|
||||
|
||||
|
||||
def usage(prog_name):
|
||||
return "Usage: %s <latex file> <dpi> <fg color> <bg color>\n"\
|
||||
return "Usage: %s <format> <latex file> <dpi> <fg color> <bg color>\n"\
|
||||
"\twhere the colors are hexadecimal strings, eg 'faf0e6'"\
|
||||
% prog_name
|
||||
|
||||
|
||||
def error(message):
|
||||
sys.stderr.write(message + '\n')
|
||||
sys.exit(1)
|
||||
|
||||
|
||||
def find_exe(candidates, path):
|
||||
for prog in candidates:
|
||||
for directory in path:
|
||||
if os.name == "nt":
|
||||
full_path = os.path.join(directory, prog + ".exe")
|
||||
else:
|
||||
full_path = os.path.join(directory, prog)
|
||||
|
||||
if os.access(full_path, os.X_OK):
|
||||
return full_path
|
||||
|
||||
return None
|
||||
|
||||
|
||||
def find_exe_or_terminate(candidates, path):
|
||||
exe = find_exe(candidates, path)
|
||||
if exe == None:
|
||||
error("Unable to find executable from '%s'" % string.join(candidates))
|
||||
|
||||
return exe
|
||||
|
||||
|
||||
def run_command(cmd):
|
||||
handle = os.popen(cmd, 'r')
|
||||
cmd_stdout = handle.read()
|
||||
cmd_status = handle.close()
|
||||
|
||||
return cmd_status, cmd_stdout
|
||||
|
||||
|
||||
def make_texcolor(hexcolor):
|
||||
# Test that the input string contains 6 hexadecimal chars.
|
||||
if not hexcolor_re.match(hexcolor):
|
||||
@ -137,7 +107,7 @@ def convert_to_ppm_format(pngtopnm, basename):
|
||||
for png_file in glob.glob("%s*.png" % basename):
|
||||
ppm_file = png_file_re.sub(".ppm", png_file)
|
||||
|
||||
p2p_cmd = "%s %s" % (pngtopnm, png_file)
|
||||
p2p_cmd = "'%s' '%s'" % (pngtopnm, png_file)
|
||||
p2p_status, p2p_stdout = run_command(p2p_cmd)
|
||||
if p2p_status != None:
|
||||
error("Unable to convert %s to ppm format" % png_file)
|
||||
@ -170,7 +140,11 @@ def main(argv):
|
||||
dvipng = find_exe(["dvipng"], path)
|
||||
if dvipng == None:
|
||||
if output_format == "ppm":
|
||||
return legacy_conversion(argv)
|
||||
# The data is input to legacy_conversion in as similar
|
||||
# as possible a manner to that input to the code used in
|
||||
# LyX 1.3.x.
|
||||
vec = [ argv[0], argv[2], argv[3], argv[1], argv[4], argv[5] ]
|
||||
return legacy_conversion(vec)
|
||||
else:
|
||||
error("The old 'dvi->ps->ppm' conversion requires "
|
||||
"ppm as the output format")
|
||||
@ -180,7 +154,7 @@ def main(argv):
|
||||
pngtopnm = find_exe_or_terminate(["pngtopnm"], path)
|
||||
|
||||
# Compile the latex file.
|
||||
latex_call = "%s %s" % (latex, latex_file)
|
||||
latex_call = "'%s' '%s'" % (latex, latex_file)
|
||||
|
||||
latex_status, latex_stdout = run_command(latex_call)
|
||||
if latex_status != None:
|
||||
@ -189,7 +163,7 @@ def main(argv):
|
||||
|
||||
# Run the dvi file through dvipng.
|
||||
dvi_file = latex_file_re.sub(".dvi", latex_file)
|
||||
dvipng_call = "%s -Ttight -depth -height -D %d -fg '%s' -bg '%s' %s" \
|
||||
dvipng_call = "'%s' -Ttight -depth -height -D %d -fg '%s' -bg '%s' '%s'" \
|
||||
% (dvipng, dpi, fg_color, bg_color, dvi_file)
|
||||
|
||||
dvipng_status, dvipng_stdout = run_command(dvipng_call)
|
||||
@ -208,5 +182,6 @@ def main(argv):
|
||||
|
||||
return 0
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main(sys.argv)
|
||||
|
||||
195
lib/scripts/lyxpreview_tools.py
Normal file
195
lib/scripts/lyxpreview_tools.py
Normal file
@ -0,0 +1,195 @@
|
||||
#! /usr/bin/env python
|
||||
|
||||
# file lyxpreview_tools.py
|
||||
# This file is part of LyX, the document processor.
|
||||
# Licence details can be found in the file COPYING.
|
||||
|
||||
# author Angus Leeming
|
||||
# Full author contact details are available in file CREDITS
|
||||
|
||||
# and with much help testing the code under Windows from
|
||||
# Paul A. Rubin, rubin@msu.edu.
|
||||
|
||||
# A repository of the following functions, used by the lyxpreview2xyz scripts.
|
||||
# copyfileobj, error, find_exe, find_exe_or_terminate, mkstemp,
|
||||
# run_command, warning
|
||||
|
||||
import os, re, string, sys, tempfile
|
||||
|
||||
use_win32_modules = 0
|
||||
if os.name == "nt":
|
||||
use_win32_modules = 1
|
||||
try:
|
||||
import pywintypes
|
||||
import win32con
|
||||
import win32event
|
||||
import win32file
|
||||
import win32pipe
|
||||
import win32process
|
||||
import win32security
|
||||
import winerror
|
||||
except:
|
||||
sys.stderr.write("Consider installing the PyWin extension modules "\
|
||||
"if you're irritated by windows appearing briefly.\n")
|
||||
use_win32_modules = 0
|
||||
|
||||
|
||||
def warning(message):
|
||||
sys.stderr.write(message + '\n')
|
||||
|
||||
|
||||
def error(message):
|
||||
sys.stderr.write(message + '\n')
|
||||
sys.exit(1)
|
||||
|
||||
|
||||
def find_exe(candidates, path):
|
||||
for prog in candidates:
|
||||
for directory in path:
|
||||
if os.name == "nt":
|
||||
full_path = os.path.join(directory, prog + ".exe")
|
||||
else:
|
||||
full_path = os.path.join(directory, prog)
|
||||
|
||||
if os.access(full_path, os.X_OK):
|
||||
return full_path
|
||||
|
||||
return None
|
||||
|
||||
|
||||
def find_exe_or_terminate(candidates, path):
|
||||
exe = find_exe(candidates, path)
|
||||
if exe == None:
|
||||
error("Unable to find executable from '%s'" % string.join(candidates))
|
||||
|
||||
return exe
|
||||
|
||||
|
||||
def run_command_popen(cmd):
|
||||
handle = os.popen(cmd, 'r')
|
||||
cmd_stdout = handle.read()
|
||||
cmd_status = handle.close()
|
||||
|
||||
return cmd_status, cmd_stdout
|
||||
|
||||
|
||||
def run_command_win32(cmd):
|
||||
sa = win32security.SECURITY_ATTRIBUTES()
|
||||
sa.bInheritHandle = True
|
||||
stdout_r, stdout_w = win32pipe.CreatePipe(sa, 0)
|
||||
|
||||
si = win32process.STARTUPINFO()
|
||||
si.dwFlags = (win32process.STARTF_USESTDHANDLES
|
||||
| win32process.STARTF_USESHOWWINDOW)
|
||||
si.wShowWindow = win32con.SW_HIDE
|
||||
si.hStdOutput = stdout_w
|
||||
|
||||
process, thread, pid, tid = \
|
||||
win32process.CreateProcess(None, cmd, None, None, True,
|
||||
0, None, None, si)
|
||||
if process == None:
|
||||
return -1, ""
|
||||
|
||||
# Must close the write handle in this process, or ReadFile will hang.
|
||||
stdout_w.Close()
|
||||
|
||||
# Read the pipe until we get an error (including ERROR_BROKEN_PIPE,
|
||||
# which is okay because it happens when child process ends).
|
||||
data = ""
|
||||
error = 0
|
||||
while 1:
|
||||
try:
|
||||
hr, buffer = win32file.ReadFile(stdout_r, 4096)
|
||||
if hr != winerror.ERROR_IO_PENDING:
|
||||
data = data + buffer
|
||||
|
||||
except pywintypes.error, e:
|
||||
if e.args[0] != winerror.ERROR_BROKEN_PIPE:
|
||||
error = 1
|
||||
break
|
||||
|
||||
if error:
|
||||
return -2, ""
|
||||
|
||||
# Everything is okay --- the called process has closed the pipe.
|
||||
# For safety, check that the process ended, then pick up its exit code.
|
||||
win32event.WaitForSingleObject(process, win32event.INFINITE)
|
||||
if win32process.GetExitCodeProcess(process):
|
||||
return -3, ""
|
||||
|
||||
return None, data
|
||||
|
||||
|
||||
def run_command(cmd):
|
||||
if use_win32_modules:
|
||||
return run_command_win32(cmd)
|
||||
else:
|
||||
return run_command_popen(cmd)
|
||||
|
||||
|
||||
def get_version_info():
|
||||
version_re = re.compile("([0-9])\.([0-9])")
|
||||
|
||||
match = version_re.match(sys.version)
|
||||
if match == None:
|
||||
error("Unable to extract version info from 'sys.version'")
|
||||
|
||||
return string.atoi(match.group(1)), string.atoi(match.group(2))
|
||||
|
||||
|
||||
def copyfileobj(fsrc, fdst, rewind=0, length=16*1024):
|
||||
"""copy data from file-like object fsrc to file-like object fdst"""
|
||||
if rewind:
|
||||
fsrc.flush()
|
||||
fsrc.seek(0)
|
||||
|
||||
while 1:
|
||||
buf = fsrc.read(length)
|
||||
if not buf:
|
||||
break
|
||||
fdst.write(buf)
|
||||
|
||||
|
||||
class TempFile:
|
||||
"""clone of tempfile.TemporaryFile to use with python < 2.0."""
|
||||
# Cache the unlinker so we don't get spurious errors at shutdown
|
||||
# when the module-level "os" is None'd out. Note that this must
|
||||
# be referenced as self.unlink, because the name TempFile
|
||||
# may also get None'd out before __del__ is called.
|
||||
unlink = os.unlink
|
||||
|
||||
def __init__(self):
|
||||
self.filename = tempfile.mktemp()
|
||||
self.file = open(self.filename,"w+b")
|
||||
self.close_called = 0
|
||||
|
||||
def close(self):
|
||||
if not self.close_called:
|
||||
self.close_called = 1
|
||||
self.file.close()
|
||||
self.unlink(self.filename)
|
||||
|
||||
def __del__(self):
|
||||
self.close()
|
||||
|
||||
def read(self, size = -1):
|
||||
return self.file.read(size)
|
||||
|
||||
def write(self, line):
|
||||
return self.file.write(line)
|
||||
|
||||
def seek(self, offset):
|
||||
return self.file.seek(offset)
|
||||
|
||||
def flush(self):
|
||||
return self.file.flush()
|
||||
|
||||
|
||||
def mkstemp():
|
||||
"""create a secure temporary file and return its object-like file"""
|
||||
major, minor = get_version_info()
|
||||
|
||||
if major >= 2 and minor >= 0:
|
||||
return tempfile.TemporaryFile()
|
||||
else:
|
||||
return TempFile()
|
||||
Loading…
Reference in New Issue
Block a user