什么是 HTTPHeaderField:@“Content-Type"在目标 C [英] What is forHTTPHeaderField:@"Content-Type" in objective C

问题描述

我想问一个关于目标C的问题.NSMutableURLRequest中的"content-type"是什么?它是否与我看到的 forHTTPHeaderField 的标头字段有关?

I want to ask an question about the objective C. What is "content-type" in the NSMutableURLRequest? Is it related to the header field as I see the forHTTPHeaderField?

另外，下面的语句有什么不同?

Also, what is the different between the following statement?

// statement 1
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

// statement 2
[request setValue:@"text/html; charset=UTF-8" forHTTPHeaderField:@"Content-Type"];

非常感谢.

推荐答案

Content-type 被称为 MIME 类型，表示 HTTP 响应包含的数据类型.

Content-type is known as a MIME type that indicates what kind of data an HTTP response contains.

这里有更多关于 MIME 类型的信息和一些例子:http://en.wikipedia.org/维基/MIME

Here is more information about MIME types and some examples: http://en.wikipedia.org/wiki/MIME

有关 IANA 批准的官方 MIME 类型的完整列表，请查看此处:http://www.iana.org/assignments/media-types/

For a full list of official MIME types approved by the IANA, take a look here: http://www.iana.org/assignments/media-types/

回答您的其他问题:

• 语句 1 是一种 MIME 类型，用于响应已填写的网络表单.

• Statement 1 is a MIME type for a response to a web form that has been filled in.

语句 2 是标准 HTML 页面的 MIME 类型，该页面具有 UTF-8 字符集(基本上，国际支持与标准 ASCII 或其他内容).

Statement 2 is the MIME type for a standard HTML page which has a characterset of UTF-8 (basically, international support versus standard ASCII or something else).

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