-
Notifications
You must be signed in to change notification settings - Fork 19
/
browser.lua
275 lines (239 loc) · 6.99 KB
/
browser.lua
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
-----------------------------------------------------------------------------
-- A Browser Class for easy Web Automation with Lua-cURL
-- Author: Kai Uwe Jesussek
-- RCS ID: $Id: browser.lua,v 0.1 2011/03/11 23:55:20 kai Exp $
-----------------------------------------------------------------------------
if cURL == nil then
local cURL = require("cURL")
end
if table == nil then
local table = require("table")
end
if string == nil then
local string = require("string")
end
local string = require("string")
local base = _G
local table = require("table")
USERAGENT = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" --windows xp internet explorer 6.0
--this function joins 2 urls (absolute or relative)
function url_join(_base, _url)
assert(type(_url) == "string")
if _base == nil or _base == "" then
return _url
end
assert(type(_base) == "string")
local base = url_split(_base)
local url = url_split(_url)
local protocol = base.protocol
local host = base.host
local path = ""
local port = ""
if url.protocol ~= nil then
protocol = url.protocol
if url.path ~= nil then
path = url.path
end
if url.port ~= nil and url.port ~= "" then
port = url.port
end
if url.host ~= nil then
host = url.host
end
else
if _url:sub(1,2) == "//" then
--set host and path
host, port, path = _url:match("^//([^;/%?]+)(:?%d*)(/?.*)")
if path == nil then
path = ""
end
elseif _url:sub(1,1) == "/" then
port = base.port
--replace path
path = _url
else
--combine paths :(
path = base.path:match("^(.*)/[^/]*")
port = base.port
if path ~= nil then
path = path .. "/" .. _url
else
path = _url
end
end
end
local ret = protocol .. "://" .. host .. port .. path
return ret
end
--this function splits an url into its parts
function url_split(_url)
--print(_url)
local ret = {}
--test ipv6
ret.protocol, ret.host, ret.port, ret.path = _url:match("^(https?)://(%[[0-9a-fA-F:]+%])(:?%d*)(.*)$")
if ret.host == nil then
--fall back to ipv4
ret.protocol, ret.host, ret.port, ret.path = _url:match("^(https?)://([^:/]+)(:?%d*)(.*)$")
end
return ret
end
-----------------------------------------------------------------------------
-- Encodes a string into its escaped hexadecimal representation
-- Input
-- s: binary string to be encoded
-- Returns
-- escaped representation of string binary
-- taken from Lua Socket and added underscore to ignore (MIT-License)
-----------------------------------------------------------------------------
function escape(s)
return string.gsub(s, "([^A-Za-z0-9_])", function(c)
return string.format("%%%02x", string.byte(c))
end)
end
-----------------------------------------------------------------------------
-- Encodes a string into its escaped hexadecimal representation
-- Input
-- s: binary string to be encoded
-- Returns
-- escaped representation of string binary
-- taken from Lua Socket
-----------------------------------------------------------------------------
function unescape(s)
return string.gsub(s, "%%(%x%x)", function(hex)
return string.char(base.tonumber(hex, 16))
end)
end
-- from encodes a key, value dictionary table
function tblencode (_arguments)
local ret = ""
if _arguments == nil or next(_arguments) == nil then -- no _arguments or empty _arguments?
return ret
end
--iterate over each key -> value pairs and urlencode them
for key, vals in pairs(_arguments) do
if type(vals) ~= "table" then
vals = {vals}
end
for i,val in ipairs(vals) do
ret = ret .. "&"..key.. "=" ..escape(val)
end
end
--cut off leadin '&'
return string.sub(ret,2)
end
--function helper for result
--taken from luasocket page (MIT-License)
local function build_w_cb(t)
return function(s,len)
table.insert(t, s)
return len,nil
end
end
--function helper for headers
--taken from luasocket page (MIT-License)
local function h_build_w_cb(t)
return function(s,len)
--stores the received data in the table t
--prepare header data
name, value = s:match("(.-): (.+)")
if name and value then
t.headers[name] = value:gsub("[\n\r]", "")
else
code, codemessage = string.match(s, "^HTTP/.* (%d+) (.+)$")
if code and codemessage then
t.code = tonumber(code)
t.codemessage = codemessage:gsub("[\n\r]", "")
end
end
return len,nil
end
end
--the browser easy to use interface
browser = {}
function browser:new(_share)
if _share == nil then
_share = cURL.share_init()
_share:setopt_share("COOKIE")
_share:setopt_share("DNS")
end
local object = { url = nil, share = _share}
setmetatable(object, {__index = browser})
return object
end
--this function sets the proxy variables for the prepare function
function browser:setProxy(_proxy, _proxytype)
self.proxy = _proxy
self.proxytype = _proxytype
print("setting proxy", self.proxy, self.proxytype)
end
--this function prepares a request
function browser:prepare(post_data, urlencoded)
local req = cURL.easy_init()
req:setopt_share(self.share)
req:setopt_url(self.url)
req:setopt_useragent(USERAGENT)
if self.proxy ~= nil and self.proxytype ~= nil then
req:setopt_proxy(self.proxy)
req:setopt_proxytype(self.proxytype)
end
if self.caInfoPath ~= nil then
req:setopt_cainfo(self.caInfoPath)
end
if post_data ~= nil then
if urlencoded and type(post_data) == "table" then
post_data = tblencode(post_data)
end
if type(post_data) == "string" then
req:setopt_post(1)
req:setopt_postfields(post_data)
req:setopt_postfieldsize(#post_data)
else
req:post(post_data)
end
end
return req
end
--this function sets the url
function browser:setUrl(url)
--appends a leading / to url if needed
if self.url and self.url:match("^(https?://[^/]+)$") then
self.url = self.url .. "/"
end
self.url = url_join(self.url or "", url)
end
--opens a webpage :) only the first parameter is required
function browser:open(url, post_data, redirect, urlencoded)
local redirect = redirect or true
local urlencoded = urlencoded == nil
local ret = {}
response_body = {}
ret.headers = {}
self:setUrl(url)
local req = self:prepare(post_data, urlencoded)
req:perform({headerfunction=h_build_w_cb(ret), writefunction=build_w_cb(response_body)})
self:setUrl(url)
ret.body = table.concat(response_body)
if redirect and ret.headers and (ret.headers.Location or ret.headers.location) and (ret.code == 301 or ret.code == 302) then
return self:open(url_join(self.url, ret.headers.Location or ret.headers.location), nil, extra_headers, redirect)
end
return ret
end
--opens a webpage :) only the first and second parameters are required
function browser:save(url, filename, post_data)
local ret = {}
ret.headers = {}
self:setUrl(url)
local req = self:prepare(post_data, false)
file = io.open(filename)
req:perform({headerfunction=h_build_w_cb(ret), writefunction=function(str) file:write(str) end })
file:close()
end
function browser:setCaInfo(path)
self.caInfoPath = path
end
--[[ usage examples:
-- b = browser:new()
-- resp = b:open("http://www.html-kit.com/tools/cookietester/")
-- print(resp.body)
-- table.foreach(resp.headers, print)
--]]