如何使用修改过的标头进行HTTP GET？ [英] How to make an HTTP GET with modified headers?

问题描述

使用修改后的头文件在Ruby中发出HTTP GET请求的最佳方法是什么？

What is the best way to make an HTTP GET request in Ruby with modified headers?

我想从日志文件的末尾获取一系列字节并且一直在玩弄以下代码，但是服务器正在回复一个回复，说这是服务器无法理解的请求（服务器是Apache）。

I want to get a range of bytes from the end of a log file and have been toying with the following code, but the server is throwing back a response saying that "it is a request that the server could not understand" (the server is Apache).

require 'net/http'
require 'uri'

#with @address, @port, @path all defined elsewhere

httpcall = Net::HTTP.new(@address, @port)

headers = {
  'Range' => 'bytes=1000-'
}

resp, data = httpcall.get2(@path, headers)

1. 有没有更好的方法在Ruby中定义头文件？


2. 有谁知道为什么这会对Apache失败？如果我在浏览器中进入 http：// [地址]：[端口] / [路径] 我得到了我正在寻找的数据而没有问题。

1. Is there a better way to define headers in Ruby?
2. Does anyone know why this would be failing against Apache? If I do a get in a browser to http://[address]:[port]/[path] I get the data I am seeking without issue.

推荐答案

创建了一个适合我的解决方案（工作得非常好） - 此示例获取范围偏移量：

Created a solution that worked for me (worked very well) - this example getting a range offset:

require 'uri'
require 'net/http'

size = 1000 #the last offset (for the range header)
uri = URI("http://localhost:80/index.html")
http = Net::HTTP.new(uri.host, uri.port)
headers = {
    'Range' => "bytes=#{size}-"
}
path = uri.path.empty? ? "/" : uri.path

#test to ensure that the request will be valid - first get the head
code = http.head(path, headers).code.to_i
if (code >= 200 && code < 300) then

    #the data is available...
    http.get(uri.path, headers) do |chunk|
        #provided the data is good, print it...
        print chunk unless chunk =~ />416.+Range/
    end
end

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