如何通过HTTP下载只有ruby的大文件 [英] How to download via HTTP only piece of big file with ruby
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问题描述
我只需要通过HTTP下载文件的前几千字节。
I only need to download the first few kilobytes of a file via HTTP.
我试过
require 'open-uri'
url = 'http://example.com/big-file.dat'
file = open(url)
content = file.read(limit)
但它实际上下载了整个文件。
But it actually downloads the full file.
推荐答案
这在使用套接字时似乎有效:
This seems to work when using sockets:
require 'socket'
host = "download.thinkbroadband.com"
path = "/1GB.zip" # get 1gb sample file
request = "GET #{path} HTTP/1.0\r\n\r\n"
socket = TCPSocket.open(host,80)
socket.print(request)
# find beginning of response body
buffer = ""
while !buffer.match("\r\n\r\n") do
buffer += socket.read(1)
end
response = socket.read(100) #read first 100 bytes of body
puts response
我很好奇是否有红宝石方式。
I'm curious if there is a "ruby way".
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