html 表单的 application/x-www-form-urlencoded 是默认值吗？
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is application/x-www-form-urlencoded default for html form?
提问by Moon
I found out that HTML form supports only two enctype types. They are application/x-www-form-urlencodedand multipart/form-data. I understand that I use multipart/form-datawhen I need to upload a file. When do I use application/x-www-form-urlencoded? Is it default form enctype?
我发现 HTML 表单只支持两种 enctype 类型。他们是application/x-www-form-urlencoded和multipart/form-data。我知道我multipart/form-data在需要上传文件时使用。我application/x-www-form-urlencoded什么时候使用？它是默认形式的enctype吗？
回答by BalusC
Yes, it is. Here's a cite from the W3 HTML forms specification:
是的。这是W3 HTML 表单规范中的引用：
The default value for this attribute is
"application/x-www-form-urlencoded". The value"multipart/form-data"should be used in combination with theINPUTelement,type="file".
此属性的默认值为
"application/x-www-form-urlencoded"。该值"multipart/form-data"应与INPUT元素结合使用type="file"。
The webbrowser will take care about URL encodingautomatically.
网络浏览器会自动处理URL 编码。
回答by Moon
application/x-www-form-urlencoded
应用程序/x-www-form-urlencoded
This is the default content type. Forms submitted with this content type must be encoded as follows:
这是默认的内容类型。使用此内容类型提交的表单必须编码如下：
1) Control names and values are escaped. Space characters are replaced by '+', and then reserved characters are escaped as described in [RFC1738], section 2.2: Non-alphanumeric characters are replaced by '%HH', a percent sign and two hexadecimal digits representing the ASCII code of the character. Line breaks are represented as "CR LF" pairs (i.e., `%0D%0A').
1) 控件名称和值被转义。空格字符被 '+' 替换，然后保留字符被转义，如 [RFC1738]，第 2.2 节所述：非字母数字字符被替换为 '%HH'，一个百分号和两个表示 ASCII 码的十六进制数字特点。换行符表示为“CR LF”对（即`%0D%0A'）。
2) The control names/values are listed in the order they appear in the document. The name is separated from the value by '=' and name/value pairs are separated from each other by `&'.
2) 控件名称/值按它们在文档中出现的顺序列出。名称与值之间用“=”分隔，名称/值对用“&”分隔。
Check out thislink for more on form content types, or herefor more information about file uploads and such.
回答by Seth
Yes, the default enctypeis application/x-www-form-urlencoded.
是的，默认enctype是application/x-www-form-urlencoded。
