【发布时间】：2016-02-21 20:45:08
【问题描述】：
我想构建一个 python 客户端来与我的 python Google Cloud Endpoints API 对话。我的简单 HelloWorld 示例在 python 客户端中遇到了 HTTPException，我不知道为什么。
我已经按照this 非常有用的线程中的建议设置了简单的示例。 GAE Endpoints API 在 localhost:8080 上运行没有问题 - 我可以在 API Explorer 中成功访问它。在我添加有问题的 service = build() 行之前，我的简单客户端在 localhost:8080 上运行良好。
当试图让客户端与端点 API 对话时，我收到以下错误：
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/dist27/gae_override/httplib.py", line 526, in getresponse
raise HTTPException(str(e))
HTTPException: Deadline exceeded while waiting for HTTP response from URL: http://localhost:8080/_ah/api/discovery/v1/apis/helloworldendpoints/v1/rest?userIp=%3A%3A1
我已尝试延长 http 截止日期。这不仅没有帮助，而且如此简单的首次调用 localhost 不应超过默认的 5 秒截止日期。我也试过直接在浏览器中访问发现 URL，效果也很好。
这是我的简单代码。首先是客户端，main.py：
import webapp2
import os
import httplib2
from apiclient.discovery import build
http = httplib2.Http()
# HTTPException happens on the following line:
# Note that I am using http, not https
service = build("helloworldendpoints", "v1", http=http,
discoveryServiceUrl=("http://localhost:8080/_ah/api/discovery/v1/apis/{api}/{apiVersion}/rest"))
# result = service.resource().method([parameters]).execute()
class MainPage(webapp2.RequestHandler):
def get(self):
self.response.headers['Content-type'] = 'text/plain'
self.response.out.write("Hey, this is working!")
app = webapp2.WSGIApplication(
[('/', MainPage)],
debug=True)
这里是 Hello World 端点，helloworld.py：
"""Hello World API implemented using Google Cloud Endpoints.
Contains declarations of endpoint, endpoint methods,
as well as the ProtoRPC message class and container required
for endpoint method definition.
"""
import endpoints
from protorpc import messages
from protorpc import message_types
from protorpc import remote
# If the request contains path or querystring arguments,
# you cannot use a simple Message class.
# Instead, you must use a ResourceContainer class
REQUEST_CONTAINER = endpoints.ResourceContainer(
message_types.VoidMessage,
name=messages.StringField(1),
)
package = 'Hello'
class Hello(messages.Message):
"""String that stores a message."""
greeting = messages.StringField(1)
@endpoints.api(name='helloworldendpoints', version='v1')
class HelloWorldApi(remote.Service):
"""Helloworld API v1."""
@endpoints.method(message_types.VoidMessage, Hello,
path = "sayHello", http_method='GET', name = "sayHello")
def say_hello(self, request):
return Hello(greeting="Hello World")
@endpoints.method(REQUEST_CONTAINER, Hello,
path = "sayHelloByName", http_method='GET', name = "sayHelloByName")
def say_hello_by_name(self, request):
greet = "Hello {}".format(request.name)
return Hello(greeting=greet)
api = endpoints.api_server([HelloWorldApi])
最后，这是我的 app.yaml 文件：
application: <<my web client id removed for stack overflow>>
version: 1
runtime: python27
api_version: 1
threadsafe: yes
handlers:
- url: /_ah/spi/.*
script: helloworld.api
secure: always
# catchall - must come last!
- url: /.*
script: main.app
secure: always
libraries:
- name: endpoints
version: latest
- name: webapp2
version: latest
为什么我超过了 HTTP 截止日期以及如何解决？
【问题讨论】：
标签： python-2.7 google-app-engine google-cloud-endpoints google-api-python-client httpexception