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Converts an email Message object to a payload format by replacing line feed characters with CRLF (carriage return + line feed) and removing the first two lines.

Purpose

This function transforms an email Message object into a properly formatted payload suitable for HTTP transmission or email protocols. It specifically handles line ending conversion from Unix-style (LF) to Windows/network-style (CRLF) and strips the first two lines of the message, likely removing headers or metadata that should not be included in the final payload.

Source Code

def _message_to_payload(message):
    # type: (Message) -> AnyStr
    lf = b"\n"
    crlf = b"\r\n"
    payload = message_as_bytes_or_string(message)
    lines = payload.split(lf)
    payload = bytes.join(crlf, lines[2:]) + crlf
    return payload

Parameters

Parameter Details

message: An email.message.Message object containing the message data to be converted. This should be a valid Message instance that can be serialized to bytes or string format.

Return Value

Returns an AnyStr (either bytes or string) representing the formatted payload. The payload consists of all lines from the original message starting from line 3 onwards (index 2), with line endings converted to CRLF (\r\n), and terminated with a final CRLF sequence.

Dependencies

• email
• typing
• office365

Required Imports

from email.message import Message
from typing import AnyStr
from office365.runtime.compat import message_as_bytes_or_string

Usage Example

from email.message import Message
from typing import AnyStr
from office365.runtime.compat import message_as_bytes_or_string

def _message_to_payload(message):
    lf = b"\n"
    crlf = b"\r\n"
    payload = message_as_bytes_or_string(message)
    lines = payload.split(lf)
    payload = bytes.join(crlf, lines[2:]) + crlf
    return payload

# Example usage
msg = Message()
msg.set_payload("Line 1\nLine 2\nLine 3\nLine 4")
formatted_payload = _message_to_payload(msg)
print(formatted_payload)

Best Practices

• Ensure the input message object is a valid email.message.Message instance before calling this function
• Be aware that this function removes the first two lines of the message, which may contain important header information
• The function assumes the message can be converted to bytes format; ensure compatibility with the message_as_bytes_or_string utility
• This function is likely intended for internal use within the office365 library for formatting messages for API requests
• The returned payload will always end with CRLF, which is standard for many network protocols

Tags

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