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工具.python调用js.md

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python 调用 js 的几种方式

一、用os 库

这种方式最直接

import os

os.system('/Users/apple/.nvm/versions/node/v16.9.0/bin/node test.js')
/Users/apple/Documents/meiminjun/Notebook/10-python/jsencrypt.js:1141
  j_lm && "Microsoft Internet Explorer" == navigator.appName
                                           ^

ReferenceError: navigator is not defined
    at /Users/apple/Documents/meiminjun/Notebook/10-python/jsencrypt.js:1141:44
    at Object.<anonymous> (/Users/apple/Documents/meiminjun/Notebook/10-python/jsencrypt.js:2824:3)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:94:18)
    at Object.<anonymous> (/Users/apple/Documents/meiminjun/Notebook/10-python/test.js:1:17)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)





256

二、使用execjs

这种方式可以拿到返回值，但是无法使用模块化特性，只能单文件方式

import execjs
import os
os.environ["EXECJS_RUNTIME"] = "Node"
# 查看环境
execjs.get().name
'JavaScriptCore'

运行js 脚本

# eval 执行简单脚本
e = execjs.eval('new Array(1,2,3)')
print(e)
[1, 2, 3]

# execjs.compile用于执行更复杂的js代码
x = execjs.compile('''
        function add(x,y){
            return x+y;
            };
        ''')
print(x.call('add', '1', '2'))
12

运行js 文件

with open('test.js') as f:
    jsdata = f.read()

ctx = execjs.compile(jsdata)
# print(x.call('add', '1', '2'))
publickey = 'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv6PccYjPuMMwkLpEiugcxctFWV2Kw5XCWgSoVYVx7XO9N2Q7tSIW5mPqoAKDg'
print(x.call('jsencrypt', publickey, 'Fengliya1991'))
---------------------------------------------------------------------------

ProgramError                              Traceback (most recent call last)

/var/folders/vh/4zv6yqys5w7dry2wxbzxkkvxf0lzcv/T/ipykernel_24039/120078937.py in <module>
      5 # print(x.call('add', '1', '2'))
      6 publickey = 'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv6PccYjPuMMwkLpEiugcxctFWV2Kw5XCWgSoVYVx7XO9N2Q7tSIW5mPqoAKDg'
----> 7 print(x.call('jsencrypt', publickey, 'Fengliya1991'))


/usr/local/anaconda3/envs/py39/lib/python3.9/site-packages/execjs/_abstract_runtime_context.py in call(self, name, *args)
     35         if not self.is_available():
     36             raise execjs.RuntimeUnavailableError
---> 37         return self._call(name, *args)
     38 
     39     @abstractmethod


/usr/local/anaconda3/envs/py39/lib/python3.9/site-packages/execjs/_external_runtime.py in _call(self, identifier, *args)
     90         def _call(self, identifier, *args):
     91             args = json.dumps(args)
---> 92             return self._eval("{identifier}.apply(this, {args})".format(identifier=identifier, args=args))
     93 
     94         def _exec_with_pipe(self, source):


/usr/local/anaconda3/envs/py39/lib/python3.9/site-packages/execjs/_external_runtime.py in _eval(self, source)
     76 
     77             code = 'return eval({data})'.format(data=data)
---> 78             return self.exec_(code)
     79 
     80         def _exec_(self, source):


/usr/local/anaconda3/envs/py39/lib/python3.9/site-packages/execjs/_abstract_runtime_context.py in exec_(self, source)
     16         if not self.is_available():
     17             raise execjs.RuntimeUnavailableError
---> 18         return self._exec_(source)
     19 
     20     def eval(self, source):


/usr/local/anaconda3/envs/py39/lib/python3.9/site-packages/execjs/_external_runtime.py in _exec_(self, source)
     86             else:
     87                 output = self._exec_with_pipe(source)
---> 88             return self._extract_result(output)
     89 
     90         def _call(self, identifier, *args):


/usr/local/anaconda3/envs/py39/lib/python3.9/site-packages/execjs/_external_runtime.py in _extract_result(self, output)
    165                 return value
    166             else:
--> 167                 raise ProgramError(value)
    168 
    169 


ProgramError: ReferenceError: Can't find variable: jsencrypt

设置其他js执行环境

import os

# os.environ.keys()
os.environ["EXECJS_RUNTIME"] = "Node"

execjs.get().name
'JavaScriptCore'