检查 Ruby 中是否存在 URL [英] Check if URL exists in Ruby

问题描述

我将如何使用 Ruby 检查 URL 是否存在?

How would I go about checking if a URL exists using Ruby?

例如，对于网址

https://google.com

结果应该是真实，但对于网址

the result should be truthy, but for the URLs

https://no.such.domain

或

https://stackoverflow.com/no/such/path

结果应该是falsey

推荐答案

使用 Net::HTTP 库.

require "net/http"
url = URI.parse("http://www.google.com/")
req = Net::HTTP.new(url.host, url.port)
res = req.request_head(url.path)

此时 res 是一个 Net::HTTPResponse 包含请求结果的对象.然后您可以检查响应代码:

At this point res is a Net::HTTPResponse object containing the result of the request. You can then check the response code:

do_something_with_it(url) if res.code == "200"

注意:要检查基于 https 的 url，use_ssl 属性应为 true 为:

Note: To check for https based url, use_ssl attribute should be true as:

require "net/http"
url = URI.parse("https://www.google.com/")
req = Net::HTTP.new(url.host, url.port)
req.use_ssl = true
res = req.request_head(url.path)

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