解決python3中自定義wsgi函數(shù),make_server函數(shù)報錯的問題
更新時間：2017年11月21日 20:16:54 作者：5K小碼
下面小編就為大家分享一篇解決python3中自定義wsgi函數(shù),make_server函數(shù)報錯的問題，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧
#coding:utf-8
from wsgiref.simple_server import make_server
def RunServer(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/html')])
return '<h1>Hello, web!</h1>'
if __name__ == '__main__':
httpd = make_server('localhost', 8000, RunServer)
print ("Serving HTTP on port 8000...")
httpd.serve_forever()
這段代碼在python2.7中可以運(yùn)行，到python3.4中運(yùn)行，就開始報錯，報錯內(nèi)容如下：
Serving HTTP on port 8000...
127.0.0.1 - - [12/Apr/2016 16:44:17] "GET / HTTP/1.1" 200 0
Traceback (most recent call last):
File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run
self.finish_response()
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response
self.write(data)
File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance
127.0.0.1 - - [12/Apr/2016 16:44:17] "GET / HTTP/1.1" 500 59
Traceback (most recent call last):
File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run
self.finish_response()
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response
self.write(data)
File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python34\lib\wsgiref\handlers.py", line 141, in run
self.handle_error()
File "C:\Python34\lib\wsgiref\handlers.py", line 369, in handle_error
self.finish_response()
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response
self.write(data)
File "C:\Python34\lib\wsgiref\handlers.py", line 275, in write
self.send_headers()
File "C:\Python34\lib\wsgiref\handlers.py", line 332, in send_headers
if not self.origin_server or self.client_is_modern():
File "C:\Python34\lib\wsgiref\handlers.py", line 345, in client_is_modern
return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 60566)
File "C:\Python34\lib\socketserver.py", line 305, in _handle_request_noblock
self.process_request(request, client_address)
File "C:\Python34\lib\socketserver.py", line 331, in process_request
self.finish_request(request, client_address)
File "C:\Python34\lib\socketserver.py", line 344, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "C:\Python34\lib\socketserver.py", line 673, in __init__
self.handle()
File "C:\Python34\lib\wsgiref\simple_server.py", line 133, in handle
handler.run(self.server.get_app())
File "C:\Python34\lib\wsgiref\handlers.py", line 144, in run
self.close()
File "C:\Python34\lib\wsgiref\simple_server.py", line 35, in close
self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
----------------------------------------
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 60568)
----------------------------------------
127.0.0.1 - - [12/Apr/2016 16:44:18] "GET / HTTP/1.1" 200 0
Traceback (most recent call last):
File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run
self.finish_response()
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response
self.write(data)
File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance
127.0.0.1 - - [12/Apr/2016 16:44:18] "GET / HTTP/1.1" 500 59
Traceback (most recent call last):
File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run
self.finish_response()
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response
self.write(data)
File "C:\Python34\lib\wsgiref\handlers.py", line 267, in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python34\lib\wsgiref\handlers.py", line 141, in run
self.handle_error()
File "C:\Python34\lib\wsgiref\handlers.py", line 369, in handle_error
self.finish_response()
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response
self.write(data)
File "C:\Python34\lib\wsgiref\handlers.py", line 275, in write
self.send_headers()
File "C:\Python34\lib\wsgiref\handlers.py", line 332, in send_headers
if not self.origin_server or self.client_is_modern():
File "C:\Python34\lib\wsgiref\handlers.py", line 345, in client_is_modern
return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python34\lib\socketserver.py", line 305, in _handle_request_noblock
self.process_request(request, client_address)
File "C:\Python34\lib\socketserver.py", line 331, in process_request
self.finish_request(request, client_address)
File "C:\Python34\lib\socketserver.py", line 344, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "C:\Python34\lib\socketserver.py", line 673, in __init__
self.handle()
File "C:\Python34\lib\wsgiref\simple_server.py", line 133, in handle
handler.run(self.server.get_app())
File "C:\Python34\lib\wsgiref\handlers.py", line 144, in run
self.close()
File "C:\Python34\lib\wsgiref\simple_server.py", line 35, in close
self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
猛地一看，這么多報錯，一下就蒙圈了，各種google百度，各種查，google到時能查到一些，
但是英文不好，也看不太明白，百度查到的都是垃圾，根本就沒用，最后硬著頭皮，一點一點看源碼。
首先，根據(jù)第一行的提示：
File "C:\Python34\lib\wsgiref\handlers.py", line 138, in run self.finish_response()
我這里用的編輯器是pycharm，找到handlers.py文件的138行，按住ctrl點擊文件中的finish_response()方法，
就找到self.finish_response()定義的位置了。根據(jù)第二條提示：
File "C:\Python34\lib\wsgiref\handlers.py", line 181, in finish_response self.write(data)
發(fā)現(xiàn)是write方法出現(xiàn)錯誤，再按住ctrl點擊write方法，找到定義write方法的位置，發(fā)現(xiàn)第一行就定義了一條報錯：
assert type(data) is bytes, \ "write() argument must be a bytes instance"
對照上面的報錯信息，發(fā)現(xiàn)可能是變量data的類型，不是bytes，所以在handlers.py181行代碼self.write(data)上面加一句：
data=data.encode(),再次刷新程序，發(fā)現(xiàn)所有報錯居然都沒了，程序正常運(yùn)行。
以上這篇解決python3中自定義wsgi函數(shù),make_server函數(shù)報錯的問題就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持腳本之家。
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