【发布时间】：2013-05-18 21:01:48
【问题描述】：
我有一个烧瓶应用程序，它与另一个网络服务通信。我有这个错误，似乎只有当两个应用程序都在同一台服务器上运行时才会发生，但我不知道来源是什么。 Flask 应用程序通过 Apache 中的 WSGIScriptAlias 托管在 /tools。
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] mod_wsgi (pid=25705): Exception occurred processing WSGI script '/opt/tools-frontend/wsgi.py'.
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] Traceback (most recent call last):
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/flask/app.py", line 1701, in __call__
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] return self.wsgi_app(environ, start_response)
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/flask/app.py", line 1689, in wsgi_app
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] response = self.make_response(self.handle_exception(e))
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/flask/app.py", line 1687, in wsgi_app
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] response = self.full_dispatch_request()
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/flask/app.py", line 1361, in full_dispatch_request
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] response = self.make_response(rv)
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/flask/app.py", line 1447, in make_response
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] rv = self.response_class(rv, headers=headers, status=status)
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/werkzeug/wrappers.py", line 627, in __init__
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] self.headers = Headers(headers)
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/werkzeug/datastructures.py", line 836, in __init__
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] self.extend(defaults)
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] File "/opt/tools-frontend/ENV_1/lib/python2.7/site-packages/werkzeug/datastructures.py", line 978, in extend
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] for key, value in iterable:
[Thu May 23 13:11:44 2013] [error] [client 41.164.8.114] ValueError: too many values to unpack
[Thu May 23 13:11:44 2013] [debug] mod_deflate.c(615): [client 41.164.8.114] Zlib: Compressed 590 to 372 : URL /tools/api/login/, referer: http://www.website.com/tools
API 托管在同一台机器上的不同域中，查看日志文件，它工作正常。
API 调用在以下函数中进行：
@app.route('/api/', methods=['GET', 'POST', 'PUT', 'DELETE'])
@app.route('/api/<path:endpoint>', methods=['GET', 'POST', 'PUT', 'DELETE'])
def api(endpoint=None):
# extract POST/PUT variables
dat = request.form
if len(dat) == 0:
# extract GET variables
dat = request.args
# submit request to API
out = call_api(request.method, endpoint, dat, request.files)
return out
调用：
def call_api(method, endpoint, data=None, files=None):
url = 'https://api.example.com' + endpoint
if method.upper() == "GET":
r = requests.get(url, data=data, verify=False)
# ... similarly for other verbs
return r.text, r.status_code, r.headers
【问题讨论】：
-
您是否要在视图中设置标题？你能分享一下代码吗？
headers的值不是None，也不是 dict，而是可迭代的。 Iterable 应该产生(key, value)对，但这不是它得到的。 -
在我看来，当flask/werkzeug 试图处理响应时，崩溃正在发生。您可以在堆栈跟踪中看到我的代码根本没有涉及，顶部文件是
flask/app/py。触发 API 调用的行是r = requests.get(url, data=data, verify=False) -
你能分享你的视图代码吗？解析响应的标头令人窒息，您的代码不在堆栈跟踪中，因为错误不在您的视图中，是的，但这并不意味着它不是原因 - 毕竟它会生成响应。
标签： python flask mod-wsgi wsgi werkzeug