我想从一个website.So获取一个图像(GIF格式),我用龙卷风,建立异步HTTP客户端做it.My代码是这样的:龙卷风卷曲HTTP客户端无法获取二进制文件
import tornado.httpclient
import tornado.ioloop
import tornado.gen
import tornado.web
tornado.httpclient.AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")
http_client = tornado.httpclient.AsyncHTTPClient()
class test(tornado.web.RequestHandler):
@tornado.gen.coroutine
def get(self):
content = yield http_client.fetch('http://www.baidu.com/img/bdlogo.gif')
print('=====', type(content.body))
application = tornado.web.Application([
(r'/', test)
])
application.listen(80)
tornado.ioloop.IOLoop.instance().start()
所以当我访问服务器时,它应该获取一个gif文件。但是它会捕获一个异常。
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x81 in position 8: invalid start byte
ERROR:tornado.application:Uncaught exception GET/(127.0.0.1)
HTTPRequest(protocol='http', host='127.0.0.1', method='GET', uri='/', version='HTTP/1.1', remote_ip='127.0.0.1', headers={'Accept-Language': 'zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3', 'Accept-Encoding': 'gzip, deflate', 'Host': '127.0.0.1', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'User-Agent': 'Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130922 Firefox/17.0', 'Connection': 'keep-alive', 'Cache-Control': 'max-age=0', 'If-None-Match': '"da39a3ee5e6b4b0d3255bfef95601890afd80709"'})
Traceback (most recent call last):
File "/usr/lib/python3.2/site-packages/tornado/web.py", line 1144, in _when_complete
if result.result() is not None:
File "/usr/lib/python3.2/site-packages/tornado/concurrent.py", line 129, in result
raise_exc_info(self.__exc_info)
File "<string>", line 3, in raise_exc_info
File "/usr/lib/python3.2/site-packages/tornado/stack_context.py", line 302, in wrapped
ret = fn(*args, **kwargs)
File "/usr/lib/python3.2/site-packages/tornado/gen.py", line 550, in inner
self.set_result(key, result)
File "/usr/lib/python3.2/site-packages/tornado/gen.py", line 476, in set_result
self.run()
File "/usr/lib/python3.2/site-packages/tornado/gen.py", line 505, in run
yielded = self.gen.throw(*exc_info)
File "test.py", line 12, in get
content = yield http_client.fetch('http://www.baidu.com/img/bdlogo.gif')
File "/usr/lib/python3.2/site-packages/tornado/gen.py", line 496, in run
next = self.yield_point.get_result()
File "/usr/lib/python3.2/site-packages/tornado/gen.py", line 395, in get_result
return self.runner.pop_result(self.key).result()
File "/usr/lib/python3.2/concurrent/futures/_base.py", line 393, in result
return self.__get_result()
File "/usr/lib/python3.2/concurrent/futures/_base.py", line 352, in __get_result
raise self._exception
tornado.curl_httpclient.CurlError: HTTP 599: Failed writing body (0 != 1024)
ERROR:tornado.access:500 GET/(127.0.0.1) 131.53ms
这似乎试图我的二进制文件进行解码为UTF-8文本,这是unnecessary.IF我评论
tornado.httpclient.AsyncHTTPClient.configure( “tornado.curl_httpclient.CurlAsyncHTTPClient” )
出来,将使用一个简单的HTTP客户端而不是pycurl,效果很好。(它告诉我的“内容”的类型是字节)
因此,如果它返回一个字节对象,为什么它会尝试解码它?我认为问题是pycurl或pycurl在龙卷风中的包装,对吧?
我的python版本是3.2.5,龙卷风3.1.1,pycurl 7.19。
谢谢!
感谢您的回复!我试过了,pycurl似乎很有用。但龙卷风期望pycurl返回头部和身体作为字符串(现在他们是字节,因为他们应该!)。所以看起来龙卷风不像python3,只需要很少的修改就可以在python3下运行。我不是Python的专家,所以我选择放弃并使用简单的http客户端。不管怎样,谢谢你! – riaqn
其余的Tornado在Python 3上运行良好;这只是curl_httpclient有问题。这些将在支持Python 3的官方pycurl发布后得到修复。 –
http://pycurl.sourceforge.net/doc/release-notes.html看起来像它已被更新到据说支持python3 – proteneer