GAE + Python2.7 + webapp2 + AJAX

Question

是否有与GAE + Python2.7 + webapp2的AJAX实现相关的任何教程或代码示例。

我试图按照以下说明：

http://code.google.com/appengine/articles/rpc.html

，但我收到以下错误：

Traceback (most recent call last): 
    File "E:\dev\workspace\test\webapp2.py", line 1536, in __call__ 
    rv = self.handle_exception(request, response, e) 
    File "E:\dev\workspace\test\webapp2.py", line 1530, in __call__ 
    rv = self.router.dispatch(request, response) 
    File "E:\dev\workspace\test\webapp2.py", line 1278, in default_dispatcher 
    return route.handler_adapter(request, response) 
    File "E:\dev\workspace\test\webapp2.py", line 1101, in __call__ 
    handler = self.handler(request, response) 
TypeError: __init__() takes exactly 1 argument (3 given) 

还有另外一个类似的讨论在这里：

Google App Engine Python Protorpc Error: __call__() takes exactly 1 argument (3 given)

他RES是Specialscope的例子我的代码：

main.py

from BaseHandler import BaseHandler 
from google.appengine.ext import blobstore 
from google.appengine.ext.webapp import blobstore_handlers 
import logging 
from google.appengine.api import files 
from google.appengine.api import images 
import json 
import webapp2 

class FileuploadHandler(BaseHandler): 
    def get(self): 
    blobstore.create_upload_url('/static') 
    context={} 
    self.render_response("uploader.html",**context) 
class FileDownloadHandler(blobstore_handlers.BlobstoreUploadHandler,BaseHandler): 
    def post(self): 
    upload_files=self.request.POST 
    #image=upload_files['file'] 
    logging.error(upload_files) 
    keys=upload_files.keys() 
    imageurls=[] 
    for key in keys: 
     if key.find("uploadimage")!=-1: 
     image=upload_files[key] 
     file_name=files.blobstore.create(mime_type='image/jpg') 
     with files.open(file_name,'a') as f: 
      f.write(image.value) 
     files.finalize(file_name) 
     blob_key=files.blobstore.get_blob_key(file_name) 
     imageurls.append(images.get_serving_url(blob_key)) 
    context={} 
    context['imagelinks']=imageurls 
    self.response.write(json.dumps(context)) 

app = webapp2.WSGIApplication([ 
     ('/upload',      FileuploadHandler), 
     ('/download',     FileDownloadHandler), 
     ], debug = True)  

BaseHandler.py

import webapp2 
import os 

from webapp2_extras import jinja2 
from google.appengine.ext import db 


class BaseHandler(webapp2.RequestHandler): 

    @webapp2.cached_property 
    def jinja2(self): 
     # Returns a Jinja2 renderer cached in the app registry. 
     return jinja2.get_jinja2(app=self.app) 

    def render_response(self, _template, **context): 
     # Renders a template and writes the result to the response. 
     rv = self.jinja2.render_template(_template, **context) 
     self.response.write(rv) 

Answer 1

堆栈跟踪表明，你有你的WSGIApplication会URL映射是有一个组，但没有相应的参数的处理程序。

如果你有

(r'/foo/(\s+)/(\s+)', FooHandler), 

，那么你需要

class FooHandler(webapp2.RequestHandler): 
    def get(self, arg1, arg2): 
    ... 

您正在使用预期通过几年的Python 2.7支持的文档。如果我处于你的位置，我很想让应用首先在Python 2.5上工作，然后将端口设置为2.7。

Answer 2

我已经为GAE + Python2.7这里AJAX图片上传的代码示例， http://verysimplescripts.blogspot.com/

Answer 3

的问题是在这里：

import webapp2 

app = webapp2.WSGIApplication([ 
     ('/upload',      FileuploadHandler), 
     ('/download',     FileDownloadHandler), 
     ], debug = True)  

不能使用webapp2.WSGIApplication来构建应用程序，它不了解protorpc。相反，执行此操作：

from protorpc.wsgi import service 

app = service.service_mappings([ 
     ('/upload',      FileuploadHandler), 
     ('/download',     FileDownloadHandler), 
     ])