Workaround to quinnj/JSON3.jl#272

src/StructuredOutputs.jl

@@ -3,6 +3,7 @@ module StructuredOutputs
 using JSON3, StructTypes
 using REPL # needed for Docs.doc in _getdoc
 
+include("json3_issue272.jl") # workaround to an issue with JSON3.jl
 include("enum_replacement.jl") # `OneOf` as a replacement for `Enum`
 include("logprobs.jl") # correlate logprobs of tokens with items in struct
 include("schema.jl")  # generate a JSON schema from a Julia type

src/json3_issue272.jl

@@ -0,0 +1,15 @@
+"""
+Wrapper type used for a workaround to https://github.com/quinnj/JSON3.jl/issues/272
+until that issue is resolved.
+"""
+struct Workaround272{T} <: AbstractString
+    str::T
+end
+
+JSON3.read_json_str(s::Workaround272) = s.str
+
+"""
+Parse a JSON string using `JSON3.read`, without first trying to interpret it as a filename.
+"""
+parse_json(s::AbstractString) = JSON3.read(Workaround272(s))
+parse_json(s::AbstractString, t) = JSON3.read(Workaround272(s), t)

src/openAI.jl

@@ -61,7 +61,7 @@ function _get_choice(T, c)
     c.finish_reason == "length" && error("JSON output not complete due to length limit.")
     c.finish_reason == "content_filter" && error("JSON output not complete due to content filter.")
     hasproperty(c.message, :refusal) && !isnothing(c.message.refusal) && error("Refused with message: ", c.message.refusal)
-    o = JSON3.read(c.message.content, T)
+    o = parse_json(c.message.content, T)
     if hasproperty(c, :logprobs)
         find_logprobs!(o, c.logprobs.content)
     else

test/runtests.jl

@@ -1,5 +1,5 @@
 using StructuredOutputs
-using StructuredOutputs: system, assistant, user, get_choice, response_format
+using StructuredOutputs: system, assistant, user, get_choice, response_format, parse_json
 using Test
 using JSON3
 using JSONSchema
@@ -64,7 +64,7 @@ end
 
     # For now it is better to use Union than absstract type...
     o15b = FooOrBar[Foo(42, "Hi"), Bar(Foo(0, "bye"), nothing)]
-    @test_throws ArgumentError JSON3.read(JSON3.write(o15b), typeof(o15b))
+    @test_throws ArgumentError parse_json(JSON3.write(o15b), typeof(o15b))
 
     noS = Schema(JSON3.write(StructuredOutputs.schema(typeof((invalid=true,)))))
 
@@ -78,11 +78,11 @@ end
         #println("Object:")
         #println(jo)
         S = Schema(js)
-        pjo = JSON3.read(jo) # Object in JSON3.Object form
+        pjo = parse_json(jo) # Object in JSON3.Object form
         @test validate(S, pjo) === nothing
         @test validate(noS, pjo) !== nothing
         #r = StructTypes.constructfrom(t, pjo) # Object restored into type t.
-        r = JSON3.read(jo, t) # skip StructTypes
+        r = parse_json(jo, t) # skip StructTypes
         @test typeof(r) == t
         @test r == o
     end