AJAX POST&跨域 解决方案 - CORS
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概述
- CORS能做什么:
- CORS的原理:
- CORS浏览器支持情况如下图:
CORS启航
问题&小结
- 刚刚说到的兼容性。CORS是W3C中一项较新的方案,所以部分浏览器还没有对其进行支持或者完美支持,详情可移至 http://www.w3.org/TR/cors/
- 安全问题。CORS提供了一种跨域请求方案,但没有为安全访问提供足够的保障机制,如果你需要信息的绝对安全,不要依赖CORS当中的权限制度,应当使用更多其它的措施来保障,比如OAuth2。
- cors在移动终端支持的不错,可以考虑在移动端全面尝试;PC上有不兼容和没有完美支持,所以小心踩坑。当然浏览器兼容就是个伪命题,说不准某个浏览器的某个版本就完美兼容了,说不准就有点小坑,尼玛伤不起!~
- jsonp是get形式,承载的信息量有限,所以信息量较大时CORS是不二选择;
- 配合新的JSAPI(fileapi、xhr2等)一起使用,实现强大的新体验功能。
The header just denotes what the content is encoded in. It is not necessarily possible to deduce the type of the content from the content itself, i.e. you can't necessarily just look at the content and know what to do with it. That's what HTTP headers are for, they tell the recipient what kind of content they're (supposedly) dealing with.
Content-type: application/json; charset=utf-8
designates the content to be in JSON format, encoded in the UTF-8 character encoding. Designating the encoding is somewhat redundant for JSON, since the default (only?) encoding for JSON is UTF-8. So in this case the receiving server apparently is happy knowing that it's dealing with JSON and assumes that the encoding is UTF-8 by default, that's why it works with or without the header.
Does this encoding limit the characters that can be in the message body?
No. You can send anything you want in the header and the body. But, if the two don't match, you may get wrong results. If you specify in the header that the content is UTF-8 encoded but you're actually sending Latin1 encoded content, the receiver may produce garbage data, trying to interpret Latin1 encoded data as UTF-8. If of course you specify that you're sending Latin1 encoded data and you're actually doing so, then yes, you're limited to the 256 characters you can encode in Latin1.
http://stackoverflow.com/questions/9254891/what-does-content-type-application-json-charset-utf-8-really-mean
来自:http://blog.csdn.net/suhenhappy/article/details/18043241
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
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- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- +++AJAX POST&跨域 解决方案 - CORS+++
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
- AJAX POST&跨域 解决方案 - CORS
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