1. <?php
2. class download
3. {
4. var $url;//远程文件地址
5. var $file_name = "hdwiki.zip";//下载来的文件名称
6. var $save_path = "./updatefile";//下载到本地的文件路径
7. var $localfile;//下载到本地文件的路径和名称
8. var $warning;//警告信息
9. var $redown=0;//是否重新下载
10. /*初始化*/
11. function seturl($url)
12. {
13. if(!emptyempty($url))$this->url = $url;
14. }
15. function setfilename($file_name)
16. {
17. if(!emptyempty($file_name))$this->file_name = $file_name;
18. }
19. function setsavepath($save_path)
20. {
21. if(!emptyempty($save_path))$this->save_path = $save_path;
22. }
23. function setredown($redown)
24. {
25. if(!emptyempty($redown))$this->redown = $redown;
26. }
27. function download($url, $redown = 0, $save_path = 0, $file_name = 0)
28. {
29. $this->seturl($url);
30. $this->setfilename($file_name);
31. $this->setsavepath($save_path);
32. $this->setredown($redown);
33. if(!file_exists($this->save_path))
34. {
35. $dir = explode("/",$this->save_path);
36. foreach($dir as $p)
37. mkdir($p);
38. }
39. }
40. /* 检查url合法性函数 */
41. function checkurl(){
42. return preg_match("/^(http|ftp)(://)([a-za-z0-9-_]+[./]+[w-_/]+.*)+$/i", $this->url);
43. }
44. //下载文件到本地
45. function downloadfile()
46. {//开源代码phpfensi.com
47. //检测变量
48. $this->localfile = $this->save_path."/".$this->file_name;
49. if($this->url == "" || $this->localfile == ""){
50. $this->warning = "error: 变量设置错误.";
51. return $this->warning;
52. }
53. if (!$this->checkurl()){
54. $this->warning = "error: url ". $this->url ." 不合法.";
55. return $this->warning;
56. }
57. if (file_exists($this->localfile)){
58. if($this->redown)
59. {
60. unlink($this->localfile);
61. }
62. else
63. {
64. $this->warning = "warning: 升级文件 ". $this->localfile ." 已经存在！ <a href='?action=download&redown=1' target='_self'>重新下载</a>";
65. return $this->warning;
66. //exit("error: 本地文件 ". $this->localfile ." 已经存在,请删除或改名后重新运行本程序.");
67. }
68. }
69. //打开远程文件
70. $fp = fopen($this->url, "rb");
71. if (!$fp){
72. $this->warning = "error: 打开远程文件 ". $this->url ." 失败.";
73. return $this->warning;
74. }
75. //打开本地文件
76. $sp = fopen($this->localfile, "wb");
77. if (!$sp){
78. $this->warning = "error: 打开本地文件 ". $this->localfile ." 失败.";
79. return $this->warning;
80. }
81. //下载远程文件
82. //echo "正在下载远程文件，请等待";
83. while (!feof($fp)){
84. $tmpfile .= fread($fp, 1024);
85. //echo strlen($tmpfile);
86. }
87. //保存文件到本地
88. fwrite($sp, $tmpfile);
89. fclose($fp);
90. fclose($sp);
91. if($this->redown)
92. $this->warning = "success: 重新下载文件 ". $this->file_name ." 成功";
93. else
94. $this->warning = "success: 下载文件 ". $this->file_name ." 成功";
95. return $this->warning;
96. }
97. }
98. ?>