blocks|key|547245|text|request.stream是由WSGI服务器传递给应用程序的原始数据流。读取它时不会进行解析，尽管您通常会使用request.get_data()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|547246|data+=+request.stream.read()|code-block|syntax|javascript|547247|如果流之前被request.data或其他属性读取，则流将为空。|547248|entityMap|0|LINK|mutability|MUTABLE|url|https://werkzeug.palletsprojects.com/wrappers/#werkzeug.wrappers.BaseRequest.stream^0|0|E|1K|I|0|E|0|0|0|6|C|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

<a href="https://werkzeug.palletsprojects.com/wrappers/#werkzeug.wrappers.BaseRequest.stream" rel="noreferrer"><code>request.stream</code></a> is the stream of raw data passed to the application by the WSGI server. No parsing is done when reading it, although you usually want <code>request.get_data()</code> instead.

<pre><code>data = request.stream.read()
</code></pre>

The stream will be empty if it was previously read by <code>request.data</code> or another attribute.

blocks|key|330519|text|我创建了一个WSGI中间件来存储来自environ['wsgi.input']流的原始正文。我将值保存在WSGI环境中，这样我就可以在我的应用程序中从request.environ['body_copy']访问它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|330520|这在Werkzeug或Flask中不是必需的，因为无论内容类型如何，request.get_data()都将获得原始数据，但可以更好地处理HTTP和WSGI行为。|330521|这会将整个正文读取到内存中，这将是一个问题，例如，如果发布了一个大文件。如果Content-Length头丢失，它将不会读取任何内容，因此它不会处理流请求。|330522|from+io+import+BytesIO

class+WSGICopyBody(object):
++++def+__init__(self,+application):
++++++++self.application+=+application

++++def+__call__(self,+environ,+start_response):
++++++++length+=+int(environ.get('CONTENT_LENGTH')+or+0)
++++++++body+=+environ['wsgi.input'].read(length)
++++++++environ['body_copy']+=+body
++++++++#+replace+the+stream+since+it+was+exhausted+by+read()
++++++++environ['wsgi.input']+=+BytesIO(body)
++++++++return+self.application(environ,+start_response)

app.wsgi_app+=+WSGICopyBody(app.wsgi_app)|code-block|syntax|javascript|330523|request.environ['body_copy']|330524|entityMap^0|I|L|23|S|0|Y|I|0|12|E|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|13|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|L|7|14|8|@]|D|@]|E|$M|N]]|$1|Q|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|R|$]]

I created a WSGI middleware that stores the raw body from the <code>environ['wsgi.input']</code> stream. I saved the value in the WSGI environ so I could access it from <code>request.environ['body_copy']</code> within my app. 

This isn't necessary in Werkzeug or Flask, as <code>request.get_data()</code> will get the raw data regardless of content type, but with better handling of HTTP and WSGI behavior.

This reads the entire body into memory, which will be an issue if for example a large file is posted. This won't read anything if the <code>Content-Length</code> header is missing, so it won't handle streaming requests.

<pre class="lang-py prettyprint-override"><code>from io import BytesIO

class WSGICopyBody(object):
 def __init__(self, application):
 self.application = application

 def __call__(self, environ, start_response):
 length = int(environ.get('CONTENT_LENGTH') or 0)
 body = environ['wsgi.input'].read(length)
 environ['body_copy'] = body
 # replace the stream since it was exhausted by read()
 environ['wsgi.input'] = BytesIO(body)
 return self.application(environ, start_response)

app.wsgi_app = WSGICopyBody(app.wsgi_app)
</code></pre>

<pre class="lang-py prettyprint-override"><code>request.environ['body_copy']
</code></pre>

blocks|key|547390|text|使用request.get_data()获取原始数据，而不考虑内容类型。数据被缓存，您随后可以随意访问request.data、request.json和request.form。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|547391|如果您首先访问request.data，它将首先使用一个参数调用get_data来解析表单数据。如果请求具有表单内容类型(multipart/form-data、application/x-www-form-urlencoded或application/x-url-encoded)，则将使用原始数据。在这种情况下，request.data和request.json将显示为空。|547392|entityMap|0|LINK|mutability|MUTABLE|url|http://werkzeug.pocoo.org/docs/wrappers/#werkzeug.wrappers.BaseRequest.get_data^0|2|I|1F|C|1S|C|25|C|2|I|0|0|7|C|W|8|1P|J|29|X|37|P|4E|C|4R|C|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|F|3|G|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|C]|$9|16|A|17|B|C]|$9|18|A|19|B|C]|$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

Use <a href="http://werkzeug.pocoo.org/docs/wrappers/#werkzeug.wrappers.BaseRequest.get_data" rel="noreferrer"><code>request.get_data()</code></a> to get the raw data, regardless of content type. The data is cached and you can subsequently access <code>request.data</code>, <code>request.json</code>, <code>request.form</code> at will.

If you access <code>request.data</code> first, it will call <code>get_data</code> with an argument to parse form data first. If the request has a form content type (<code>multipart/form-data</code>, <code>application/x-www-form-urlencoded</code>, or <code>application/x-url-encoded</code>) then the raw data will be consumed. <code>request.data</code> and <code>request.json</code> will appear empty in this case.

blocks|key|330619|text|如果request.headers["Content-Type"]被识别为表单数据，则request.data将为空，表单数据将被解析为request.form。要获得原始数据而不考虑内容类型，请使用request.get_data()。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|330620|request.data调用request.get_data(parse_form_data=True)，这会导致表单数据的行为不同。|330621|entityMap^0|2|V|17|C|1W|C|2S|I|0|0|C|E|12|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|I|$]]

<code>request.data</code> will be empty if <code>request.headers["Content-Type"]</code> is recognized as form data, which will be parsed into <code>request.form</code>. To get the raw data regardless of content type, use <code>request.get_data()</code>.

<code>request.data</code> calls <code>request.get_data(parse_form_data=True)</code>, which results in the different behavior for form data.

Previously, I asked <a href="https://stackoverflow.com/q/10434599">How to get data received in Flask request</a> because <code>request.data</code> was empty. The answer explained that <code>request.data</code> is the raw post body, but will be empty if form data is parsed. How can I get the raw post body unconditionally?

<pre><code>@app.route('/', methods=['POST'])
def parse_request():
 data = request.data # empty in some cases
 # always need raw data here, not parsed form data
</code></pre>

Get raw POST body in Python Flask regardless of Content-Type header

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服务器

数据流

之前，我问是因为request.data是空的。答案解释说，request.data是原始的post主体，但如果解析表单数据，它将为空。如何才能无条件地获取原始的帖子正文？@app.route('/', methods=['POST'])def parse_request():    data = request.da...

问在Python Flask中获取原始POST正文，而不考虑Content-Type标头
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