how to use Python requests to post a binary stream with parameters?

Question

there is my code: client:

def upload(url,file):
    file_name=file.split('\\')[-1]

    with open(file,'rb') as f:
        r=requests.post(url,data=f)

server side:

    $datastr = fopen('php://input',"rb");
    $filename='upload/111.bin';
    if ($fp = fopen($filename,"wb")){
    while(!feof($datastr)){
        fwrite($fp,fread($datastr,4096)) ;
        }
    }

it can work, but I don't know how to post the file stream with file name. if I use r=requests.post(url,data={ 'name':file_name, 'file':open(file,'rb') }), $_POST is null

if only post file stream, it can works with open(file,'rb') as f: r=requests.post(url,data=f) but I don't know how to post the stream with file name. — cloud
– cloud, Commented Apr 24, 2022 at 9:24

JJ Hassan · Accepted Answer · 2022-04-24 10:23:58Z

1

According to the documentation you can POST a multipart file with requests, but to POST it as a stream you should use requests-toolbelt.

If no streaming is actually required, you could modify your code to be:

def upload(url,file):
    file_name=file.split('\\')[-1]

with open(file,'rb') as f:
    r=requests.post(url,files={"file": (file_name, f)})

Using files in this way let’s you include file name and other header info (see docs for more information)

edited Apr 24, 2022 at 10:23

answered Apr 24, 2022 at 9:56

JJ Hassan

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3 Comments

cloud Over a year ago

I need to POST a stream, but I also need to know the name of stream file. So I'm confused with that.

JJ Hassan Over a year ago

Okay. See the requests toolbar link I included. You should build a multipart encoder and possibly wrap it in a monitor too. If that’s what you’re looking for I’ll edit my answer to include that

cloud Over a year ago

I have tried MultipartEncoder, if only post file stream it can work. but if I want to post file name and stream together, $_POST is null. Here is my code.

def upload_multipart(url,file_path):     file_name=file_path.split('\\')[-1]     encoder=MultipartEncoder(         fields={             'filename':file_name,             'file':(file_name,open(file_path,'rb'),'application/octet-stream')})     data=MultipartEncoderMonitor(encoder,upload_callback)     response=requests.post(url,data=data,headers={'Content-Type':data.content_type})

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