使用python请求通过表单数据上传图片答案

【问题标题】：Upload image through form data using python requests使用python请求通过表单数据上传图片
【发布时间】：2017-08-25 12:51:50
【问题描述】：

我正在尝试自动上传图片。

当我在浏览器中上传图片并查看网络选项卡时，我在请求正文中看到以下内容：

------WebKitFormBoundary053SrPeDVvrnxY3c
Content-Disposition: form-data; name="uploadId"

0:0:48deedc5937d0:1009c3
------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="mtype"

1000
------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="extensions"

png,gif
------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="minPixSize"

1000
------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="maxBytesSize"

1000
------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="masterSize"


------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="masterWidth"


------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="masterHeight"


------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="imageFile1"; filename="01.jpg"
Content-Type: image/jpeg


------WebKitFormBoundary053SrPeDVvrnxY3g--

如何使用 python requests lib 重复这样的请求？

问题是最后一部分：

------WebKitFormBoundary053SrPeDVvrnxY3g
Content-Disposition: form-data; name="imageFile1"; filename="01.jpg"
Content-Type: image/jpeg

所有其他字段都可以添加为传递给data参数的dict中的字段。

到目前为止，我尝试过这个：

requests.post(
    url="http://myserver.com/upload",
    headers={
        "Content-Type": "multipart/form-data",
    },
    data={
        "uploadId": "0:0:48deedc5937d0:1009c3",
        "mtype": "1000",
        "extensions": "png,gif",
        "minPixSize": "1000",
        "maxBytesSize": "1000",
        "masterSize": "",
        "masterWidth": "",
        "masterHeight": ""
    },
    files={'media': open("01.jpg", 'rb')}
)

服务器回复：

Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found; id: null

【问题讨论】：

标签： python file-upload request multipartform-data

【解决方案1】：

这行得通：

import requests
from requests_toolbelt.multipart.encoder import MultipartEncoder

multipart_data = MultipartEncoder(
    fields={
        "uploadId": "0:2d7765623034:557915d737b48:000456",
        "mtype": "1000",
        "extensions": "png,gif",
        "minPixSize": "1000",
        "maxBytesSize": "1000",
        "masterSize": "",
        "masterWidth": "",
        "masterHeight": "",
        "imageFile1": (
            "filename.jpg",
            open("filename.jpg"], 'rb'),
            "image/jpeg"
        )
    }
)

requests.post(
    url="http://myserver.com/upload",
    headers={
        "Content-Type": multipart_data.content_type,
    },
    data=multipart_data,
)

【讨论】：