Simple Json library for the F5 iRules language to parse and decode Json.
This library is a rewrite of the Json parser from mongoose.
It can fetch Json tokens from any valid Json by JsonPath expressions.
Only the dot-notation and a subset of operators are supported.
| Operator | Description |
|---|---|
$ |
The root element to query. This starts all path expressions. |
.<name> |
Dot-notated child. |
[<number>] |
Array index. |
Save the json.irule file as an iRule named json. Do not attach it to any virtual server. It defines only some procs that can be called by other iRules.
# Json to parse
set json "{\"object1\": {\"key\":\"value\",\"array1\":\[{\"v1\":\"mem1\",\"v2\":\"mem2\"},{\"v3\":\"mem3\"}\],\"num1\":1},\"bool2\":true}"
# Set the JsonPath expression
set path "$.object1.key"
# Get the index and length of a token described by path.
# A positive return value represents the found index, a negative value describes an error:
# -1: Json nesting is too deep
# -2: Invalid Json
# -3: Key not found
# -4: Invalid/Unsupported JsonPath expression
set len -1 ; # This variable is populated with the length of the found token.
set idx [call json::json_get { $json $path len }]
# Get the token described by path.
# - String tokens are enclosed by quotes.
# - Array tokens are enclosed by square braces.
# - Object tokens are enclosed by curly braces.
set token [call json::json_get_tok { $json $path }]
# Get the type of the token.
# This is a simply lookup of the first char of the token.
# Type can be: string, array, object, false, true, null, number or invalid
set type [call json::json_get_type { $token }]
# Decodes a string token
set decoded [call json::json_decode_str { $token }]- Create an iFile
test-jsonfrom thetest-json.ifile. - Attach the
test.iruleto a Virtual Server with an associated http profile. - Send a http request to it.
(C) 2024 Juergen Mang [email protected]
SPDX-License-Identifier: GPL-2.0-only