blocks|key|126415|text|如果您正在接收multipart/form-data响应，则可以使用requests-toolbelt库对其进行解析，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|126416|$+pip+install+requests-toolbelt|code-block|syntax|javascript|126417|安装后|126418|from+requests_toolbelt.multipart+import+decoder

testEnrollResponse+=+requests.post(...)
multipart_data+=+decoder.MultipartDecoder.from_response(testEnrollResponse)

for+part+in+multipart_data.parts:
++++print(part.content)++#+Alternatively,+part.text+if+you+want+unicode
++++print(part.headers)|126419|entityMap^0|7|J|Y|H|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

If you're receiving a <code>multipart/form-data</code> response, you can parse it using the <code>requests-toolbelt</code> library like so:

<pre><code>$ pip install requests-toolbelt
</code></pre>

After installing it

<pre><code>from requests_toolbelt.multipart import decoder

testEnrollResponse = requests.post(...)
multipart_data = decoder.MultipartDecoder.from_response(testEnrollResponse)

for part in multipart_data.parts:
 print(part.content) # Alternatively, part.text if you want unicode
 print(part.headers)
</code></pre>

blocks|key|123838|text|Flask的代码示例，使用https://github.com/defnull/multipart|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|123839|import+multipart+as+mp
from+multipart+import+tob

try:
++++from+io+import+BytesIO
except+ImportError:
++++from+StringIO+import+StringIO+as+BytesIO

@app.route('/',+methods=["GET","POST"])
def+index():
++++++++...
++++++++elif+flask.request.method+==+"POST":
++++++++++++++++data+=+flask.request.data
++++++++++++++++s+=+data.split("\r")[0][2:]
++++++++++++++++p+=+mp.MultipartParser(BytesIO(tob(data)),s)
++++++++++++++++blob+=+p.parts()[0].value
++++++++++++++++f+=+open("file.bin","wb")
++++++++++++++++f.write(blob.encode("latin-1"))
++++++++++++++++f.close()|code-block|syntax|javascript|123840|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/defnull/multipart^0|D|10|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Code sample for Flask, uses <a href="https://github.com/defnull/multipart" rel="noreferrer">https://github.com/defnull/multipart</a>

<pre><code>import multipart as mp
from multipart import tob

try:
 from io import BytesIO
except ImportError:
 from StringIO import StringIO as BytesIO

@app.route('/', methods=["GET","POST"])
def index():
 ...
 elif flask.request.method == "POST":
 data = flask.request.data
 s = data.split("\r")[0][2:]
 p = mp.MultipartParser(BytesIO(tob(data)),s)
 blob = p.parts()[0].value
 f = open("file.bin","wb")
 f.write(blob.encode("latin-1"))
 f.close()
</code></pre>

blocks|key|2682570|text|下面是解析多部分数据的working+example。您可以在交互式python提示符下试用它。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2682571|import+email

msg+=+email.message_from_string('''\
MIME-Version:+1.0
Content-Type:+multipart/mixed;+boundary="++++XXXX"

--++++XXXX
Content-Type:+text/plain


--++++XXXX
Content-Type:+text/plain

--++++XXXX--
''')

msg.is_multipart()|code-block|syntax|javascript|2682572|一旦你知道它在你的系统上工作，你就可以从POST数据中构建你自己的电子邮件消息，并以同样的方式解析它。如果您有一个字符串形式的原始post+body，那么可以在请求头部中找到其余必要的信息。为了清楚起见，我在这里添加了缩进，在块字符串中不应该有无关的缩进。|2682573|++++epost_data+=+'''\
MIME-Version:+1.0
Content-Type:+%25s

%25s'''+%25+(self.headers['content-type'],+post_data)

++++msg+=+email.message_from_string(post_data)

++++if+msg.is_multipart():
++++++++for+part+in+msg.get_payload():
++++++++++++name+=+part.get_param('name',+header='content-disposition')
++++++++++++filename+=+part.get_param('filename',+header='content-disposition')
++++++++++++#+print+'name+%25s'+%25+name+#+"always"+there
++++++++++++#+print+'filename+%25s'+%25+filename+#+only+there+for+files...
++++++++++++payload+=+part.get_payload(decode=True)
++++++++++++print+payload[:100]+#+output+first+100+characters|2682574|第一个%25s将替换为内容类型，第二个将替换为post_data。然后，您可以将有效负载写入文件，等等。|style|CODE|2682575|要小心考虑保存文件的安全隐患。您可能无法信任张贴的文件名，例如在某些web服务器上，它可能以../../filename.sh开头，因此如果您尝试编写/my-folder/../../filename.sh，攻击者可能会将恶意文件放在您尝试存储文件的位置之外。还建议在信任文件本身之前，对文件进行严格的验证，使其成为允许的类型。您不想让攻击者覆盖您系统上的任何文件。|2682576|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/sugarguo/Flask_Blog/blob/master/ext_lib/email/test/test_email.py#L1359|1|https://stackoverflow.com/questions/50880481/how-does-rfile-read-work^0|B|F|0|0|0|1T|9|1|0|0|3|2|L|9|0|1A|H|23|S|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|K|3|L|5|F|7|1B|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|1C|8|@$A|1D|B|1E|O|P]|$A|1F|B|1G|O|P]]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1H|8|@$A|1I|B|1J|O|P]|$A|1K|B|1L|O|P]]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1M|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]]]

A <a href="https://github.com/sugarguo/Flask_Blog/blob/master/ext_lib/email/test/test_email.py#L1359" rel="nofollow noreferrer">working example</a> of parsing multipart data follows. You can try it out at the interactive python prompt.

<pre><code>import email

msg = email.message_from_string('''\
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=" XXXX"

-- XXXX
Content-Type: text/plain


-- XXXX
Content-Type: text/plain

-- XXXX--
''')

msg.is_multipart()
</code></pre>

Once you know its working on your system, you can build your own email message out of the POST data and parse it the same way. If you have the raw <a href="https://stackoverflow.com/questions/50880481/how-does-rfile-read-work">post body</a> as a string the rest of the necessary information can be found in the request headers. I added indentation here for clarity, you should not have extraneous indentation in the block string.

<pre><code> epost_data = '''\
MIME-Version: 1.0
Content-Type: %s

%s''' % (self.headers['content-type'], post_data)

 msg = email.message_from_string(post_data)

 if msg.is_multipart():
 for part in msg.get_payload():
 name = part.get_param('name', header='content-disposition')
 filename = part.get_param('filename', header='content-disposition')
 # print 'name %s' % name # "always" there
 # print 'filename %s' % filename # only there for files...
 payload = part.get_payload(decode=True)
 print payload[:100] # output first 100 characters
</code></pre>

The first <code>%s</code> will be replaced with the content type, and the second with <code>post_data</code>. You can then write the payload to a file, etc.

Be careful to consider security implications of saving a file. You may not be able to trust the file name posted, it could start with <code>../../filename.sh</code> for example on some web servers, so if you try to write <code>/my-folder/../../filename.sh</code> the attacker could potentially place a malicious file outside of the location where you are trying to store files. Strong validation of the file being the allowed type before trusting the file itself is also recommended. You do not want to let attackers overwrite any file on your system.

I am writing Web Service Client, using requests library. I am getting data in multipart/form-data that contains a file and text-json. I have no idea how to parse it. Is there a proper library to parse multipart/form-data format in python or should I write parser on my own? 

my code:

<pre><code>data = {
 "prototypeModel" :('prototypeModel', open(prototypeModel, 'rb'), 'application/octet-stream', {'Expires': '0'}),
 "mfcc_1" : ('mfcc', open(mfcc_1, 'rb'), 'application/octet-stream', {'Expires': '0'}),
 "mfcc_2" : ('mfcc', open(mfcc_2, 'rb'), 'application/octet-stream', {'Expires': '0'}),
 "mfcc_3" : ('mfcc', open(mfcc_3, 'rb'), 'application/octet-stream', {'Expires': '0'}),
}

print( '---------------------- start enroll ----------------------')
testEnrollResponse = requests.post(server+sessionID, files = data, json = declaredParameters)
</code></pre>

<blockquote>
 b'\r\n--c00750d1-8ce4-4d29-8390-b50bf02a92cc\r\nContent-Disposition:
 form-data; name="playbackHash"\r\nContent-Type:
 application/octet-stream\r\n\r\n\x16\x00\x00\x00\x00\x00\x00\x00serialization::archive\n\x00\x04\x08\x04
 .... 
 x00\x00R\x94\x9bp\x8c\x00\r\n--c00750d1-8ce4-4d29-8390-b50bf02a92cc\r\nContent-Disposition:
 form-data; name="usersMFCC"\r\nContent-Type:
 application/octet-stream\r\n\r\n\x16\x00\x00\x00\x00\x00\x00\x00serialization::archive\n\x00\x04\x08\x04\x08\x01\x00\x00\x00\x00\x00\x00\x00\x00\xf8\x16\x00\x00\x00\x00\x00\x00u\xbd\xb4/\xda1\xea\xbf\x0f\xed\xa2&lt;\xc9\xf8\xe7\xbf?\xd5\xf06u\xe7\xf0\xbf\xd4\x8d\xd4\xa1F\xbe\x03@\x85X!\x19\xd8A\x06@\x8co\xf7\r
 ..... 
 x80\xd9\x95Yxn\xd0?\r\n--c00750d1-8ce4-4d29-8390-b50bf02a92cc\r\nContent-Disposition:
 form-data; name="scoreAndStatus"\r\nContent-Type: application/json;
 charset=utf-8\r\n\r\n{"lexLikelihood":1.544479046897232,"overallScore":-nan,"playbackLikelihood":-inf,"status":{"errorCode":0,"errorMessage":""}}\r\n--c00750d1-8ce4-4d29-8390-b50bf02a92cc--\r\n'
</blockquote>

I replaced more binary data with " ..... "

parse multipart/form-data, received from requests post

服务器

我正在使用请求库编写Web服务客户端。我正在获取multipart/form-data格式的数据，其中包含一个文件和text-json。我不知道如何解析它。有没有合适的库来解析python中的multipart/form-data格式，或者我应该自己编写解析器？我的代码：data = {  "prototypeMode...

问解析multipart/form-data，从请求post接收
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