无法使用单个未转义的反斜杠将json存储在python中 [英] Impossible to store json in python with single un-escaped backslash
问题描述
我正在为REST有效负载主体创建一个json主体，如下所示:
I am creating a json body for a REST payload body like so:
>>> j = json.loads('["foo", {"bar": ["to_be_replaced", 1.1, 1.0, 2]}]')
>>> text = "aaaa" + "\\" + "bbbbb" + "\\" + "cccc"
>>> j[1]["bar"][0] = text
>>> j
['foo', {'bar': ['aaaa\\bbbbb\\cccc', 1.1, 1.0, 2]}]
令人讨厌的是，另一面的预期格式是
Annoyingly, the format expected on the other side is like so
"aaaa\bbbb\cccc".
一个可怕的主意，我知道.
A terrible idea, I know.
我已经尝试了所有方法，并且开始相信将这种格式的文本存储在json对象中根本是不可能的.有办法吗?还是我需要让Web服务的开发人员选择更明智的分隔符.
I have tried everything and am starting to believe it's simply impossible to store text in this format in a json object. Is there a way? Or do I need to get the developers of the webservice to choose a more sensible delimiter.
我知道它实际上是一个反斜杠，如果我打印，则会得到一个反斜杠
I know it's REALLY a single backslash and if I do a print a get a single backslash
>>> print(text)
aaaa\bbbbb\cccc
但这并不能帮助我将其放入json对象中.
But that doesn't help me get it into a json object.
推荐答案
是的， 是不可能的-根据设计.
从本质上讲，JSON解析器应该只发出有效的JSON.摘自 RFC 8259 ，重点是我的:
Yes, it is impossible -- by design.
A JSON parser is, by nature, supposed to emit only valid JSON. From RFC 8259, emphasis mine:
7.字符串
字符串的表示类似于C语言中使用的约定编程语言家族.字符串以开头和结尾引号.所有Unicode字符都可以放在引号，必须转义的字符除外引号，反固相线和控制字符(U + 0000通过U + 001F).
7. Strings
The representation of strings is similar to conventions used in the C family of programming languages. A string begins and ends with quotation marks. All Unicode characters may be placed within the quotation marks, except for the characters that MUST be escaped: quotation mark, reverse solidus, and the control characters (U+0000 through U+001F).
任何字符都可以转义.如果角色在基本版中多语言平面(U + 0000到U + FFFF)，则可能是表示为六个字符的序列:反向固相线，后跟小写字母u，然后是四个十六进制数字编码字符的代码点.十六进制字母A到F可以是大写或小写.例如，一个字符串仅包含一个反向固线符的字符可能会被表示为"\ u005C".
Any character may be escaped. If the character is in the Basic Multilingual Plane (U+0000 through U+FFFF), then it may be represented as a six-character sequence: a reverse solidus, followed by the lowercase letter u, followed by four hexadecimal digits that encode the character's code point. The hexadecimal letters A through F can be uppercase or lowercase. So, for example, a string containing only a single reverse solidus character may be represented as "\u005C".
或者，有两个字符的序列转义一些流行角色的表现形式.例如，仅包含单个反斜线字符的字符串可能是更加紧凑地表示为"\\" .
Alternatively, there are two-character sequence escape
representations of some popular characters. So, for example, a
string containing only a single reverse solidus character may be
represented more compactly as "\\".
请注意短语必须逃脱"-必须"是正式定义的技术术语；某些不符合JSON规范中的MUST要求的内容不允许自己称为JSON.
Note the phrase "MUST be escaped" -- "MUST" is a formally-defined term-of-art; something which does not comply with a MUST requirement from the JSON specification is not allowed to call itself JSON.
总结:您的数据中仅包含文字反斜杠的字符串可以用JSON编码为"\ u005c" 或"\\" .它可能可能不会被编码为"\" (包括该字符作为未转义的文字).
In summary: A string containing only a literal backslash in your data may be encoded in JSON as "\u005c", or "\\". It may not be encoded as "\" (including that character as an unescaped literal).
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