I have the following python code where I want to get some parts of the file in the server with HTTP Range request. I am defining lower_endpoint and upper_endpoint. What I want to achieve is get bytes from lower_endpoint to upper_endpoint in the content part of the http partial content response only.
The original content of the file is as follows:
www.cs.bilkent.edu.tr/file.txt
www.cs.bilkent.edu.tr/folder2/temp.txt
www.textfiles.com/100/balls.txt
www.cs.bilkent.edu.tr/~cs421/fall21/project1/bilkent.txt
www.textfiles.com/games/arcana.txt
www.cs.bilkent.edu.tr/~cs421/cs421/abc.txt
www.cs.bilkent.edu.tr/~cs421/fall21/project1/files/numbers.txt
www.cs.bilkent.edu.tr/~cs421/fall21/project1/files/decrypted_file_1.txt
www.textfiles.com/100/captmidn.txt
For instance, when I set the lower_endpoint = 0 and upper_endpoint = 200, I want to get the bytes starting with "www.cs.bilkent.edu.tr/file.txt" until 200 bytes.
However, when I run the code with those values I get the following
HTTP/1.1 206 Partial Content
Date: Sun, 19 Dec 2021 07:04:52 GMT
Server: Apache/2.4.25 (FreeBSD) OpenSSL/1.0.2u-freebsd PHP/7.4.15
Last-Modified: Sat, 06 Nov 2021 11:11:25 GMT
ETag: "197-5d01cd2175dc5"
Accept-Ranges: bytes
Content-Length: 201
Conten
I think, the bytes are starting from the beginning of the Header of the response.
The code is below:
import socket
server_port = 80
clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host_name = "www.cs.bilkent.edu.tr"
clientSocket.connect((host_name, server_port)) # This line initiates the connection
file_name = "/~cs421/fall21/project1/index1.txt"
lower_endpoint = 0
upper_endpoint = 200
request = ("GET %s HTTP/1.1\r\nHost: %s\r\nRange: bytes=%s-%s\r\n\r\n" % (
file_name, host_name, lower_endpoint, upper_endpoint
)).encode()
power = 1
while power < upper_endpoint - lower_endpoint:
power *= 2
clientSocket.send(request)
rcvpkt = clientSocket.recv(power)
rcv_str = rcvpkt.decode()
print(rcv_str)
Please do not recommend using third-party HTTP client libraries.
