您可以使用Google JS Minifier。以下是一个使用它来压缩一堆JavaScript文件的Python脚本:
import httplib
import simplejson as json
import urllib
import sys
def combine_js(js_files, minify=False):
files = list(js_files)
if not minify:
code = []
for path in files:
f = open(path, 'r')
code.append(f.read())
f.close()
return '\n\n'.join(code)
def _minify(code):
params = urllib.urlencode([
('js_code', code),
('compilation_level', 'SIMPLE_OPTIMIZATIONS'),
('output_format', 'json'),
('output_info', 'compiled_code'),
('output_info', 'errors'),
('output_info', 'warnings'),
])
headers = {'Content-type': "application/x-www-form-urlencoded"}
conn = httplib.HTTPConnection('closure-compiler.appspot.com')
conn.request('POST', '/compile', params, headers)
response = conn.getresponse()
data = json.loads(response.read())
conn.close()
if not data.get('compiledCode'):
print >>sys.stderr, 'WARNING: Did not get any code from google js compiler.'
print >>sys.stderr, data
print >>sys.stderr
print >>sys.stderr, 'Using unminified code'
return None
return data.get('compiledCode')
chunks = []
code = ''
while len(files):
path = files[0]
f = open(path, 'r')
data = f.read()
f.close()
if len(code + data) >= 1000000:
res = _minify(code)
if res is None:
return combine_js(js_files)
chunks.append(res)
code = ''
continue
code += data
del files[0]
if code:
res = _minify(code)
if res is None:
return combine_js(js_files)
chunks.append(res)
return '\n\n'.join(chunks).strip()
if __name__ == '__main__':
print combine_js(sys.argv[1:], True)
用法:python 文件名.py 路径/到/你的/*.js > 压缩.js
如果你使用的是古老版本的Python并且没有安装simplejson,以下是如何使脚本能够与本地的simplejson版本一起运行(通过SSH运行以下命令):
cd
wget http://pypi.python.org/packages/source/s/simplejson/simplejson-2.3.2.tar.gz
tar xzf simplejson-2.3.2.tar.gz
export PYTHONPATH=$HOME/simplejson-2.3.2/