在JSON中使用不转义的花括号替换字符串

Question

I'm trying to replace a value in a string with a double curly (used by postman for variable substitution), but every time I try to quote or escape the braces, I always get additional escaped quotes or double escaped braces, all of which break the substitution:

Original String:

"header": [{"key": "x-device-auth","value": "\"token\""}]

OriginalString.replace('token','{{token}}')

Result:

"header":[{"key":"x-device-auth","value":"\"{{token}}\""}]

If I search for .replace('\\"token\\"','{{token}}') , I don't get a match. The final string needs to be:

"header": [{"key": "x-device-auth","value": "{{token}}"}]

Answer 1

You should be looking for token with the escaped wrapping double quotes, since you also want to replace those.

 var originalString = '"header": [{"key": "x-device-auth","value": "\\\\"token\\\\""}]'; console.log(originalString); console.log(originalString.replace('\\\\"token\\\\"','{{token}}')); originalString = '"header": [{"key": "x-device-auth","value": "\\"token\\""}]'; console.log(originalString); console.log(originalString.replace('"token"','{{token}}')); 

I have added two cases, one with the original string actually containing backslashes (first originalstring definition). The second without. Choose the one, that best matches your actual input :-)

Answer 2

I dont see the input string is having proper escape characters applied. As you posted question in javascript tag, I tried below with javascript and its giving required results.

var str = "\"header\": [[{\"key\": \"x-device-auth\",\"value\": \"token\"}]";
  var res = str.replace('token','{{token}}');