python線上編譯器的簡單原理與超簡單實現
阿新 • • 發佈:2019-01-06
今天沒事兒完了一下菜鳥教程的python編譯器發現挺有意思,想搞明白它的原理是啥,於是我輸入了以下程式碼:
import sys,os
print(sys.version_info)
print(sys.executable)
print(sys.path[0])
print(os.listdir(sys.path[0]))
with open("/usercode/file.py") as e:
print(e.read())
結果是這樣的:
我個人推測,它是將post請求的程式碼資料寫入了伺服器的一個檔案,然後用伺服器的python編譯器執行返回結果
於是我自己簡單實現一個
目錄結構:
OnlineEXEC
|----zxby.py
|----app
|----flaskrun.py
zxby.py程式碼實現:
flaskrun.py程式碼實現:# -*- coding: utf-8 -*- #__author__="ZJL" import os,sys,subprocess,tempfile,time # 建立臨時資料夾,返回臨時資料夾路徑 TempFile = tempfile.mkdtemp(suffix='_test', prefix='python_') # 檔名 FileNum = int(time.time()*1000) # python編譯器位置 EXEC = sys.executable #獲取python版本 def get_version(): v = sys.version_info version = "python %s.%s" %(v.major,v.minor) return version # 獲得py檔名 def get_pyname(): global FileNum return 'test_%d' % FileNum # 接收程式碼寫入檔案 def write_file(pyname, code): fpath = os.path.join(TempFile, '%s.py' % pyname) with open(fpath, 'w', encoding='utf-8') as f: f.write(code) print('file path: %s' % fpath) return fpath # 編碼 def decode(s): try: return s.decode('utf-8') except UnicodeDecodeError: return s.decode('gbk') # 主執行函式 def main(code): r = dict() r["version"] = get_version() pyname = get_pyname() fpath = write_file(pyname, code) try: # subprocess.check_output 是 父程序等待子程序完成,返回子程序向標準輸出的輸出結果 # stderr是標準輸出的型別 outdata = decode(subprocess.check_output([EXEC, fpath], stderr=subprocess.STDOUT, timeout=5)) except subprocess.CalledProcessError as e: # e.output是錯誤資訊標準輸出 # 錯誤返回的資料 r["code"] = 'Error' r["output"] = decode(e.output) return r else: # 成功返回的資料 r['output'] = outdata r["code"]="Success" return r finally: # 刪除檔案(其實不用刪除臨時檔案會自動刪除) try: os.remove(fpath) except Exception as e: exit(1) # if __name__ == '__main__': # code ="""print("你好")""" # print(main(code))
# -*- coding: utf-8 -*- #__author__="ZJL" from flask import Flask from flask import request from flask import Response import json import zxby app = Flask(__name__) def Response_headers(content): resp = Response(content) resp.headers['Access-Control-Allow-Origin'] = '*' return resp @app.route('/') def hello_world(): return Response_headers('hello world!!!') @app.route('/run',methods=['POST']) def run(): if request.method == 'POST' and request.form['code']: code = request.form['code'] print(code) jsondata = zxby.main(code) return Response_headers(str(jsondata)) @app.errorhandler(403) def page_not_found(error): content = json.dumps({"error_code": "403"}) resp = Response_headers(content) return resp @app.errorhandler(404) def page_not_found(error): content = json.dumps({"error_code": "404"}) resp = Response_headers(content) return resp @app.errorhandler(400) def page_not_found(error): content = json.dumps({"error_code": "400"}) resp = Response_headers(content) return resp @app.errorhandler(405) def page_not_found(error): content = json.dumps({"error_code": "405"}) resp = Response_headers(content) return resp @app.errorhandler(410) def page_not_found(error): content = json.dumps({"error_code": "410"}) resp = Response_headers(content) return resp @app.errorhandler(500) def page_not_found(error): content = json.dumps({"error_code": "500"}) resp = Response_headers(content) return resp if __name__ == '__main__': app.run(debug=True)
開啟postman測試:
正確程式碼測試:
錯誤程式碼測試:
大致就是這樣的