POST文件上载导致HTTP 400错误响应(POST file upload causes HTTP 400 error response)

 我正在尝试使用Python中的POST请求（请求库）上传文件。 我收到HTTP 400 error作为响应。 我认为这是因为我的POST请求不是应该的格式。 任何想法如何将POST请求1转换为2？ 
 
 码： 
 
files = {"file": ("test-file.txt", open("c:/users/johndoe/desktop/test-file.txt", "rb"), "text/plain")}
response = webdriver.request("POST", "https://something.com/attachments", files = files)
 
 我目前拥有的（1）： 
 
--d9bd23df892242a489b0f638d62502a6
Content-Disposition: form-data; name="file"; filename="test-file.txt"
Content-Type: text/plain

This is a test file.

Regards,

John Doe
--d9bd23df892242a489b0f638d62502a6--
 
 我应该拥有什么（2）： 
 
-----------------------------26789175756830
Content-Disposition: form-data; name="fileName"

test-file.txt
-----------------------------26789175756830
Content-Disposition: form-data; name="fileSize"

45
-----------------------------26789175756830
Content-Disposition: form-data; name="description"

undefined
-----------------------------26789175756830
Content-Disposition: form-data; name="file"; filename="test-file.txt"
Content-Type: text/plain

This is a test file.

Regards,

John Doe
-----------------------------26789175756830--
 
 我认为我需要添加（3）： 
 
-----------------------------26789175756830
Content-Disposition: form-data; name="fileName"

test-file.txt
-----------------------------26789175756830
Content-Disposition: form-data; name="fileSize"

45
-----------------------------26789175756830
Content-Disposition: form-data; name="description"

undefined
-----------------------------26789175756830

I am trying to upload a file using POST requests in Python (requests library). I get HTTP 400 error as a response. I think it is because my POST request is not in the format it should be. Any ideas how to convert POST request 1 into 2?
 
Code:
 
files = {"file": ("test-file.txt", open("c:/users/johndoe/desktop/test-file.txt", "rb"), "text/plain")}
response = webdriver.request("POST", "https://something.com/attachments", files = files)
 
What I currently have (1):
 
--d9bd23df892242a489b0f638d62502a6
Content-Disposition: form-data; name="file"; filename="test-file.txt"
Content-Type: text/plain

This is a test file.

Regards,

John Doe
--d9bd23df892242a489b0f638d62502a6--
 
What I should have (2):
 
-----------------------------26789175756830
Content-Disposition: form-data; name="fileName"

test-file.txt
-----------------------------26789175756830
Content-Disposition: form-data; name="fileSize"

45
-----------------------------26789175756830
Content-Disposition: form-data; name="description"

undefined
-----------------------------26789175756830
Content-Disposition: form-data; name="file"; filename="test-file.txt"
Content-Type: text/plain

This is a test file.

Regards,

John Doe
-----------------------------26789175756830--
 
What I think I need to add (3):
 
-----------------------------26789175756830
Content-Disposition: form-data; name="fileName"

test-file.txt
-----------------------------26789175756830
Content-Disposition: form-data; name="fileSize"

45
-----------------------------26789175756830
Content-Disposition: form-data; name="description"

undefined
-----------------------------26789175756830

原文：https://stackoverflow.com/questions/42582414