I have a problem with encoding a part of and URL using URLEncoder.
Let's say that I have:
override suspend fun getData(ids: String): SomeData {
val itemIds = ids.split(",").iterator()
val sb = StringBuilder()
sb.append("/v1/data?ids=")
itemIds.forEach {
val assetsJson = myObjectMapperWrapper.getObjectMapper().writeValueAsString(
DataRequest(type = "Picture", id = it)
)
sb.append(URLEncoder.encode(assetsJson, Charsets.UTF_8))
if (itemIds.hasNext()) sb.append("&data=")
}
val uri = sb.toString()
assetsJson looks, for example, like this: {"type":"Picture","id":" 12345"} (spaces in the id field are intentional, as this is a String and needs those spaces for reasons unknown (this is a shot to an API).
Encoding this string using an online tool gives me this:
%7B%22type%22%3A%22Picture%22%2C%22id%22%3A%22%20%20%20%20%20%20%20%20%2012345%22%7D
It starts with %7B%22 and the spaces are represented by %20. Pasting this to the URI that is used to call the API in Insomnia is working.
Using a debugger I've found out that: is encoded as:
%7B%22type%22%3A%22Picture%22%2C%22id%22%3A%22+++++++++12345%22%7D
So no %20 for a space character, but + signs.
The last problem is what is really sent to the server:
%257B%2522type%2522%253A%2522Picture%2522%252C%2522id%2522%253A%2522+++++++++12345%2522%257D
It's %257B%2522 instead of %7B&22 and + instead of %20. And this is not working even in Insomnia, and the API server returns:
Failed to convert value of type 'java.lang.String[]' to required type 'java.util.Set'; nested exception is java.lang.IllegalArgumentException: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('%' (code 37)): expected a valid value (JSON String, Number, Array, Object or token 'null', 'true' or 'false') at [Source: (String)"%7B%22type%22%3A%22Picture%22%2C%22id%22%3A%22 12345%22%7D"; line: 1, column: 2]
What's noticeable, the space character looks normal: instead of + like it was created by StringBuilder or %20 like it was created by the online tool.
The string in this stack trace is %7B%22type%22%3A%22Picture%22%2C%22id%22%3A%22 12345%22%7D" which is close to this: >%7B%22type%22%3A%22Picture%22%2C%22id%22%3A%22%20%20%20%20%20%20%20%20%2012345%22%7D but there is only one space instead of 9, and it is represented by a regular space instead of %20 or +.
How can I fix this? Am I doing something wrong?
