Question

我需要在MULTIPART / FORM-DATA中发布.wav文件。

到目前为止，我的脚本是：

import requests
import json
import wave 

def get_binwave(filename):

    w = wave.open(filename, "rb")
    binary_data = w.readframes(w.getnframes())
    w.close()
    return binary_data


payload = {
    "operating_mode":"accurate",
    "model":{
       "name":"code"
    },
    "channels":{
        "first":{
            "format": "audio_format",
            "result_format": "lattice"
         }
     }
}

multiple_files = [
    ("json","application/json",json.dumps(payload)),
    ("first","audio/wave",str(get_binwave("c.wav")))]
r = requests.post("http://localhost:8080", files=multiple_files)

我面临两个问题：

.wav文件二进制文件太大了，所以我猜我需要传输它吗？
服务器期望边界为=＆＃34; xxx --------------- xxx＆＃34;。我该如何设置？

如何正确完成所有这些？

Answer 1

请求实际上并未传输multipart/form-data次上传（但很快就会降落到那里）。在此之前，从PyPI安装requests-toolbelt。要使用它，您的脚本将看起来像

import requests
import json
from requests_toolbelt.multipart import encoder


payload = {
    "operating_mode":"accurate",
    "model":{
       "name":"code"
    },
    "channels":{
        "first":{
            "format": "audio_format",
            "result_format": "lattice"
         }
     }
}

multiple_files = [
    ("json", "application/json", json.dumps(payload)),
    ("first", "audio/wave", open("c.wav", "rb"),
]
multipart_encoder = encoder.MultipartEncoder(
    fields=multiple_files,
    boundary="xxx---------------xxx",
)
r = requests.post("http://localhost:8080",
                  data=multipart_encoder,
                  headers={'Content-Type': multipart_encoder.content_type})

有关该库和MultipartEncoder的更多文档，请参阅http://toolbelt.readthedocs.io/en/latest/uploading-data.html#streaming-multipart-data-encoder

python：请求，如何发布MULTIPART / FORM-DATA并流式传输大文件？

1 个答案: