bodies

Documentation

Overview

Package bodies decodes MHT section bodies according to their Content-Transfer-Encoding.

Index

• func DecodeQuotedPrintableLine(input string) (string, error)
• func Scan(scanner *bufio.Scanner, boundary string, encoding TransferEncoding, ...) error
• type TransferEncoding

Functions

func DecodeQuotedPrintableLine

func DecodeQuotedPrintableLine(input string) (string, error)

DecodeQuotedPrintableLine decodes a single quoted-printable encoded line (without its trailing CRLF). A hard line break appends CRLF to the result; a soft line break (trailing "=") appends nothing, so consecutive decoded lines concatenate into the original text.

The standard library's quotedprintable.Reader is not used here: it is stream-oriented and normalizes input in ways that break byte-identical round trips of Blink-generated MHTML.

func Scan

func Scan(scanner *bufio.Scanner, boundary string, encoding TransferEncoding, body *strings.Builder) error

Scan reads body lines from scanner into body until it reaches the next boundary. Base64 lines are concatenated without line breaks, quoted-printable lines are decoded (a missing encoding is treated as quoted-printable, matching Blink output where the header is sometimes stripped), and any other encoding is passed through unchanged.

Scan returns nil when it stops at an intermediate boundary and io.EOF when it stops at the closing boundary or the end of input.

Types

type TransferEncoding

type TransferEncoding string

TransferEncoding is the value of a section's Content-Transfer-Encoding header.

const (
	QuotedPrintable TransferEncoding = "quoted-printable"
	Base64          TransferEncoding = "base64"
)

Transfer encodings that receive special handling. Anything else is treated as an identity encoding and passed through unchanged.