python 中的 urllib2 相当于 ruby [英] urllib2 in python equivalent for ruby

问题描述

我在 python 中有一些代码可以在 python 中发送一个 http 请求，但我试图弄清楚如何在 ruby​​ 中执行它，因为我的服务器是 rails.

I have some code in python that sends an http request in python, but I am trying to figure out how to do it in ruby since my server is rails.

import urllib2, sys, json

url = "http://new.openbms.org/backend/api/query"
query = "select *"
fp = urllib2.urlopen(url, data=query)
obj = json.load(fp)
json.dump(obj, sys.stdout, sort_keys=True, indent=2)

这个 python 代码实际上确实返回了我所期望的，但是当我在 ruby​​ 中尝试同样的事情时，我得到了一个错误的请求

This python code actually does return what I expect, but when I try to same thing in ruby I get a bad request

require 'net/http'

query = "select *"
url = "http://new.openbms.org/backend/api/query"
uri = URI(url)
p Net::HTTP.post_form(uri, { "data" => query })

上面的这个打印输出 #.请帮忙，谢谢.

This one above print outs #<Net::HTTPBadRequest 400 Bad Request readbody=true>. Please help, thanks.

Python 版本 2.7.1Ruby 版本 1.9.2p318

Python version 2.7.1 Ruby version 1.9.2p318

推荐答案

虽然你调用远程服务器就好像它响应 application/x-www-form-urlencoded 数据一样，实际上它只是响应一个命令帖子正文.

Although you're calling the remote server as if it responds to application/x-www-form-urlencoded data, in fact it's just responding to a command in the post body.

在 Python 中，urllib2.urlopen 的数据参数需要一个字符串，它是 application/x-www-form-urlencoded.

In Python, urllib2.urlopen's data parameter expects a string that's application/x-www-form-urlencoded.

select * 不是真正的形式编码可以这么说，但无论如何它对你有用，因为服务器将它解释为名为 select * 的查询参数None 值，或者更准确地说，服务器看到带有 select * 的帖子正文并说我知道如何响应该命令".

select * isn't really form encoded so to speak, but it's working for you anyway because the server is interpreting it as a query argument named select * with a None value, or more precisely, the server sees a post body with select * and says "I know how to respond to that command".

因此，这里有一个与您正在做的事情等效的 Ruby.

So, a Ruby equivalent to what you're doing is here.

require 'net/http'
require 'json'

query = "select *"
url = "http://new.openbms.org/backend/api/query"
uri = URI(url)
response = Net::HTTP.post_form(uri, { query => nil })
puts JSON.parse(response.body)

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