这篇文章主要为大家展示了“AJAX如何跨域请求数据”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“AJAX如何跨域请求数据”这篇文章吧。

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由于浏览器的同源策略 ajax请求不可以接收到请求响应回来的数据 

请求数据需要调用浏览器的内置构造函数 XMLHttpRequest() 进行 实例对象

var xhr = new XMLHttpRequest();

注意点 在IE8之前支持的 ActiveXobject("Microsoft.XMLHTTP");  记住要进行兼容处理哦  在这里我就不写了

通过该对象进行获取

获取数据的四种状态  xhr.readyState 该属性保存着请求数据的几种状态

1.xhr.open(请求方式，请求地址，设置同/异步);

2.xhr.send(null);//发送请求  如果是post请求 那么参数需要在send中进行传递

3.会一直检测数据是否返回

4.数据返回 那么xhr.readyState的值是4  说明数据返回成功

那么我们需要进行跨域请求如何做呢

方案一：

利用script标签的src属性请求数据  src属性请求的数据浏览器是不会进行拦截的

基本 文件 流程 错误 SQL 调试

1. 请求信息 : 2026-05-24 12:14:49 HTTP/1.1 GET : /article/jpisjo.html
2. 运行时间 : 2.2576s ( Load:0.0080s Init:1.6155s Exec:0.6223s Template:0.0117s )
3. 吞吐率 : 0.44req/s
4. 内存开销 : 2,222.79 kb
5. 查询信息 : 12 queries 5 writes
6. 文件加载 : 36
7. 缓存信息 : 0 gets 0 writes
8. 配置加载 : 130
9. 会话信息 : SESSION_ID=658euq09v87jfrns713r6pv1r7

1. /www/wwwroot/tsicrk.com/index.php ( 1.09 KB )
2. /www/wwwroot/tsicrk.com/ThinkPHP/ThinkPHP.php ( 4.61 KB )
3. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Think.class.php ( 12.26 KB )
4. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage.class.php ( 1.37 KB )
5. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.52 KB )
6. /www/wwwroot/tsicrk.com/ThinkPHP/Mode/common.php ( 2.82 KB )
7. /www/wwwroot/tsicrk.com/ThinkPHP/Common/functions.php ( 53.56 KB )
8. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Hook.class.php ( 4.01 KB )
9. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/App.class.php ( 13.49 KB )
10. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB )
11. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB )
12. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB )
13. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/View.class.php ( 7.59 KB )
14. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB )
15. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ParseTemplateBehavior.class.php ( 3.88 KB )
16. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ContentReplaceBehavior.class.php ( 1.91 KB )
17. /www/wwwroot/tsicrk.com/ThinkPHP/Conf/convention.php ( 11.15 KB )
18. /www/wwwroot/tsicrk.com/App/Common/Conf/config.php ( 2.14 KB )
19. /www/wwwroot/tsicrk.com/ThinkPHP/Lang/zh-cn.php ( 2.55 KB )
20. /www/wwwroot/tsicrk.com/ThinkPHP/Conf/debug.php ( 1.49 KB )
21. /www/wwwroot/tsicrk.com/App/Home/Conf/config.php ( 0.31 KB )
22. /www/wwwroot/tsicrk.com/App/Home/Common/function.php ( 3.33 KB )
23. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.62 KB )
24. /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php ( 6.02 KB )
25. /www/wwwroot/tsicrk.com/App/Home/Controller/CommController.class.php ( 1.60 KB )
26. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Model.class.php ( 60.11 KB )
27. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php ( 32.43 KB )
28. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db/Driver/Pdo.class.php ( 16.74 KB )
29. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache.class.php ( 3.83 KB )
30. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.87 KB )
31. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template.class.php ( 28.16 KB )
32. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php ( 22.40 KB )
33. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib.class.php ( 9.16 KB )
34. /www/wwwroot/tsicrk.com/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 17.71 KB )
35. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB )
36. /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )

1. [ app_init ] --START--
2. Run Behavior\BuildLiteBehavior [ RunTime:0.000005s ]
3. [ app_init ] --END-- [ RunTime:0.000031s ]
4. [ app_begin ] --START--
5. Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000309s ]
6. [ app_begin ] --END-- [ RunTime:0.000332s ]
7. [ view_parse ] --START--
8. [ template_filter ] --START--
9. Run Behavior\ContentReplaceBehavior [ RunTime:0.000059s ]
10. [ template_filter ] --END-- [ RunTime:0.000081s ]
11. Run Behavior\ParseTemplateBehavior [ RunTime:0.008819s ]
12. [ view_parse ] --END-- [ RunTime:0.008850s ]
13. [ view_filter ] --START--
14. Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000237s ]
15. [ view_filter ] --END-- [ RunTime:0.000255s ]
16. [ app_end ] --START--

1. 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1 [ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1
2. 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1
3. 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= )
4. [8] Undefined index: pid /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php 第 47 行.
5. [8] Undefined index: db_host /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 120 行.
6. [8] Undefined index: db_port /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 121 行.
7. [8] Undefined index: db_name /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 122 行.

2.2576s