到目前为止,我有以下内容:
local socket = require "socket.http"
client,r,c,h = socket.request{url = "http://example.com/", proxy="<my proxy and port here>"}
for i,v in pairs( c ) do
print( i, v )
end
给出了如下输出:
connection close
content-type text/html; charset=UTF-8
location http://www.iana.org/domains/example/
vary Accept-Encoding
date Tue, 24 Apr 2012 21:43:19 GMT
last-modified Wed, 09 Feb 2011 17:13:15 GMT
transfer-encoding chunked
server Apache/2.2.3 (CentOS)
这意味着建立的连接只是完美。现在,我想使用此url's
获取socket.http
的标题。我搜索了之前的SO问题和luasocket's http documentation。但是,我仍然不知道如何在变量中获取/存储整个/部分页面并使用它做一些事情。
请帮忙。
答案 0 :(得分:4)
您正在使用http.request()的'通用'形式,这需要通过LTN12接收器存储正文。它并不像听起来那么复杂,试试这段代码:
local socket = require "socket.http"
local ltn12 = require "ltn12"; -- LTN12 lib provided by LuaSocket
-- This table will store the body (possibly in multiple chunks):
local result_table = {};
client,r,c,h = socket.request{
url = "http://example.com/",
sink = ltn12.sink.table(result_table),
proxy="<my proxy and port here>"
}
-- Join the chunks together into a string:
local result = table.concat(result_table);
-- Hacky solution to extract the title:
local title = result:match("<[Tt][Ii][Tt][Ll][Ee]>([^<]*)<");
print(title);
如果您的代理在整个应用程序中保持不变,那么更直接的解决方案是使用http.request()的简单形式,并通过http.PROXY指定代理:
local http = require "socket.http"
http.PROXY="<my proxy and port here>"
local result = http.request("http://www.youtube.com/watch?v=_eT40eV7OiI")
local title = result:match("<[Tt][Ii][Tt][Ll][Ee]>([^<]*)<");
print(title);
输出:
Flanders and Swann - A song of the weather
- YouTube