最後更新: 2022-12-21

目錄

• Chunked Encode
• Transfer-Encoding

Chunked Encode

Code

def wmsg(tn, msg):
    tn.write(msg + '\r\n')

tn = connect(server, port)
wmsg(tn, 'POST /test.php HTTP/1.1')
wmsg(tn, 'Host: ' + server)
wmsg(tn, 'Transfer-Encoding: chunked')
wmsg(tn, 'Content-Type: text/plain')
# 此 encode 是沒有 'Content-Length' 的
#wmsg(tn, 'Content-Length: 4')
wmsg(tn, '')

# 開始 Chunked Body 內容
wmsg(tn, '2')                  # 開始有 2 bytes data 來
wmsg(tn, 'A ')
wmsg(tn, '4')                  # 開始有 4 bytes data 來
wmsg(tn, 'test')
wmsg(tn, '0')                  # 結束 chunk
wmsg(tn, '')                   # 結束 body

說明

1) Header

Transfer-Encoding: chunked

Data is sent in a series of chunks. The Content-Length header is omitted in this case

2)

wmsg(tn, '2')                  # 開始有 2 bytes data 來
wmsg(tn, 'A ')

beginning of each chunk you need to add the length of the current chunk in hexadecimal format,
 followed by '\r\n' and then the chunk itself, followed by another '\r\n'.

3)

wmsg(tn, '0')                  # 結束 chunk
wmsg(tn, '')                   # 結束 body

The terminating chunk is a regular chunk, with the exception that its length is zero.
It is followed by the trailer('\r\n')

Transfer-Encoding

Transfer-Encoding 也是 hop-by-hop headers

i.e.

// Several values can be listed, separated by a comma

Transfer-Encoding: gzip, chunked

Gzip + Chunk

// gzip 所有內容再把它 chunk

Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Content-Encoding: gzip