How to send binary post data via HTTP?

Question

I already have binary data read from a file. Most of the examples I see online link directly to the file, and upload the whole file. I am looking how to upload the binary data that I already have from another source via HTTP POST in python.

Matthew Flaschen · Accepted Answer · 2011-10-23 07:03:34Z

7

Alternatively:

req = urllib2.Request("http://example.com", data, {'Content-Type': 'application/octet-stream'})
urllib2.urlopen(req)

That also shows how you can specify the Content-Type of the data.

answered Oct 23, 2011 at 7:03

Matthew Flaschen

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Greg Hewgill · Accepted Answer · 2011-10-23 06:58:42Z

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I'm not sure what online examples you're looking at, but urllib2.urlopen takes the data to post as a chunk of data and not a file at all.

answered Oct 23, 2011 at 6:58

Greg Hewgill

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3 Comments

esac Over a year ago

Example: 2maomao.com/blog/python-http-post-a-binary-file-using-urllib2

esac Over a year ago

I'll have to take a network sniff. The server that I am POST'ing to is issuing a 400 Bad Request when I try that.

Greg Hewgill Over a year ago

Okay, so that example reads the data from a file into png_data. If you already have the data in memory, just use that in the calls to urllib2.

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