单个字符串值是否被视为有效的 JSON？
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Is a single string value considered valid JSON?
提问by Sylvain Demers
Do you consider the JSON web response:
您是否考虑过 JSON 网络响应：
"A serialization error occurred"
to be valid or not?
是否有效？
Some validators accept itwhile others don't.
回答by igor
回答by Basel Shishani
There's a change of heart on this between RFC4627and RFC7159:
RFC4627:
RFC4627：
A JSON text is a serialized object or array.
JSON-text = object / array
JSON 文本是序列化的对象或数组。
JSON-text = object / array
RFC7159:
RFC7159：
A JSON text is a serialized value. Note that certain previous
specifications of JSON constrained a JSON text to be an object or an
array. Implementations that generate only objects or arrays where a
JSON text is called for will be interoperable in the sense that all
implementations will accept these as conforming JSON texts.JSON-text = ws value ws
JSON 文本是一个序列化值。请注意，某些先前
的 JSON 规范将 JSON 文本限制为对象或
数组。仅生成需要
JSON 文本的对象或数组的实现将是可互操作的，因为所有
实现都将接受这些作为一致的 JSON 文本。JSON-text = ws value ws
No philosophical or practical justification is provided for this change of heart. The earlier version probably makes more sense as it consistently dictates that both a singe list element and a single map element (a pair or tuple) be contained. The second version allows only a single list element to be uncontained.
没有为这种心的改变提供任何哲学或实际的理由。早期版本可能更有意义，因为它始终规定包含单个列表元素和单个映射元素（一对或元组）。第二个版本只允许不包含单个列表元素。
回答by Tony Rad
According to the grammar exposed in http://www.json.org/(which references the Standard ECMA-262 3rd Edition - December 1999par.5.1.5 The JSON Grammar) it's wrong:
根据http://www.json.org/ 中公开的语法（引用标准 ECMA-262 3rd Edition - December 1999par.5.1.5 The JSON Grammar），这是错误的：
The initial element must be:
初始元素必须是：
and then a value can be a string:
然后一个值可以是一个字符串：
回答by fgb
回答by itaka
I don't care if some validator accepts it. It's wrong. It's a question of good practice, Json format must be {"key": "value", .....}. If you consider that text Json, can work, but for the rest of programmer it's not a serious Json. If you use only that text, then you don't need Json.
我不在乎某个验证器是否接受它。这是错的。这是一个良好实践的问题，Json 格式必须是{"key": "value", .....}. 如果您认为该文本 Json 可以工作，但对于其他程序员来说，这不是一个严重的 Json。如果您只使用该文本，则不需要 Json。
