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
|
--!A cross-platform build utility based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements. See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership. The ASF licenses this file
-- to you under the Apache License, Version 2.0 (the
-- "License"); you may not use this file except in compliance
-- with the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015 - 2019, TBOOX Open Source Group.
--
-- @author ruki
-- @file download.lua
--
-- imports
import("core.base.option")
import("lib.detect.find_tool")
-- download url using curl
function _curl_download(tool, url, outputfile)
-- set basic arguments
local argv = {}
if option.get("verbose") then
table.insert(argv, "-SL")
else
table.insert(argv, "-fsSL")
end
-- set user-agent
local user_agent = os.user_agent()
if user_agent then
if tool.version then
user_agent = user_agent .. " curl/" .. tool.version
end
table.insert(argv, "-A")
table.insert(argv, user_agent)
end
-- set url
table.insert(argv, url)
-- ensure output directory
local outputdir = path.directory(outputfile)
if not os.isdir(outputdir) then
os.mkdir(outputdir)
end
-- set outputfile
table.insert(argv, "-o")
table.insert(argv, outputfile)
-- download it
os.vrunv(tool.program, argv)
end
-- download url using wget
function _wget_download(tool, url, outputfile)
-- ensure output directory
local argv = {url}
local outputdir = path.directory(outputfile)
if not os.isdir(outputdir) then
os.mkdir(outputdir)
end
-- set user-agent
local user_agent = os.user_agent()
if user_agent then
if tool.version then
user_agent = user_agent .. " wget/" .. tool.version
end
table.insert(argv, "-U")
table.insert(argv, user_agent)
end
-- set outputfile
table.insert(argv, "-O")
table.insert(argv, outputfile)
-- download it
os.vrunv(tool.program, argv)
end
-- download url
--
-- @param url the input url
-- @param outputfile the output file
--
--
function main(url, outputfile)
-- init output file
outputfile = outputfile or path.filename(url)
-- attempt to download url using curl first
local tool = find_tool("curl", {version = true})
if tool then
return _curl_download(tool, url, outputfile)
end
-- download url using wget
tool = find_tool("wget", {version = true})
if tool then
return _wget_download(tool, url, outputfile)
end
end
|
