Create dir if not exists.

Download month's index file.

Args:

• year: str, e.g. "2017"
• month: str, e.g., "Jan"
• path: str

Returns: str: filename that contents were written into

Download individual message.

Args:

• year: str, e.g. "2017"
• month: str, e.g., "Jan"
• id: str, e.g., "0" path: str

Download entire raw html contents of month. Contents will be written to subdir, e.g. ./2017_01

Args:

• year: int
• month: int (Jan = 1)

Download multiple months, using start & end year/months. See dl_month for contents.

Args:

• year_start: int
• month_start: int (Jan = 1)
• year_end: int
• month_end: int (Jan = 1)

Determine how many messages the index file contains. Parses the first line (e.g., )

Args:

• filename: str

Returns: int