我试图在 Amazon Mechanical Turk 的 HIT 请求中包含一个链接,使用 boto,并不断收到我的 XML 无效的错误。我逐渐将我的 html 缩减到最低限度,并发现一些有效链接似乎无缘无故地失败了。任何具有 boto 或 aws 专业知识的人都可以帮我解析原因吗?
我遵循了这两个指南:
- http://www.toforge.com/2011/04/boto-mturk-tutorial-create-hits/
- https://gist.github.com/j2labs/740267
这是我的例子:
from boto.mturk.connection import MTurkConnection
from boto.mturk.question import QuestionContent,Question,QuestionForm,Overview,AnswerSpecification,SelectionAnswer,FormattedContent,FreeTextAnswer
from config import *
HOST = 'mechanicalturk.sandbox.amazonaws.com'
mtc = MTurkConnection(aws_access_key_id=ACCESS_ID,
aws_secret_access_key=SECRET_KEY,
host=HOST)
title = 'HIT title'
description = ("HIT description.")
keywords = 'keywords'
s1 = """<![CDATA[<p>Here comes a link <a href='%s'>LINK</a></p>]]>""" % "http://www.example.com"
s2 = """<![CDATA[<p>Here comes a link <a href='%s'>LINK</a></p>]]>""" % "https://www.google.com/search?q=example&site=imghp&tbm=isch"
def makeahit(s):
overview = Overview()
overview.append_field('Title', 'HIT title itself')
overview.append_field('FormattedContent',s)
qc = QuestionContent()
qc.append_field('Title','The title')
fta = FreeTextAnswer()
q = Question(identifier="URL",
content=qc,
answer_spec=AnswerSpecification(fta))
question_form = QuestionForm()
question_form.append(overview)
question_form.append(q)
mtc.create_hit(questions=question_form,
max_assignments=1,
title=title,
description=description,
keywords=keywords,
duration = 30,
reward=0.05)
makeahit(s1) # SUCCESS!
makeahit(s2) # FAIL?
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 25, in makeahit
File "/usr/local/lib/python2.7/dist-packages/boto/mturk/connection.py", line 263, in create_hit
return self._process_request('CreateHIT', params, [('HIT', HIT)])
File "/usr/local/lib/python2.7/dist-packages/boto/mturk/connection.py", line 821, in _process_request
return self._process_response(response, marker_elems)
File "/usr/local/lib/python2.7/dist-packages/boto/mturk/connection.py", line 836, in _process_response
raise MTurkRequestError(response.status, response.reason, body)
boto.mturk.connection.MTurkRequestError: MTurkRequestError: 200 OK
<?xml version="1.0"?>
<CreateHITResponse><OperationRequest><RequestId>19548ab5-034b-49ec-86b2-9e499a3c9a79</RequestId></OperationRequest><HIT><Request><IsValid>False</IsValid><Errors><Error><Code>AWS.MechanicalTurk.XHTMLParseError</Code><Message>There was an error parsing the XHTML data in your request. Please make sure the data is well-formed and validates against the appropriate schema. Details: The reference to entity "site" must end with the ';' delimiter. Invalid content: <FormattedContent><![CDATA[<p>Here comes a link <a href='https://www.google.com/search?q=example&site=imghp&tbm=isch'>LINK</a></p>]]></FormattedContent> (1369323038698 s)</Message></Error></Errors></Request></HIT></CreateHITResponse>
知道为什么 s2 失败,但当两者都是有效链接时 s1 成功?两个链接内容都有效:
带有查询字符串的东西?HTTPS?
更新
我要做一些测试,但现在我的候选假设是:
- HTTPS 不工作(所以,我会看看我是否可以让另一个 https 链接工作)
- 带有参数的 URL 不起作用(所以,我会看看是否可以让另一个带有参数的 URL 起作用)
- 谷歌不允许它的搜索以这种方式发布?(如果 1 和 2 失败!)