Iris: ReadForm can't skip unmapped parameter automatically

[shenkaige]

hello
My project use ReadForm to parse request body.but if I submit an unmapped parameter to that API.

for example：
//server
type Test struct{
Name string form:"name"
}
...
test:=Test{}
ctx.ReadForm(&test)

//client request
http.POST("/xx/test",{
"name":"test",
"testkey":"xxx"
})
//end

I got the error msg like this:

_while trying to read formam: not found the field "testkey" in the path "testkey" from the request body. Trace %!s(MISSING)_

But my struct define nothing about "testkey". maybe it's helpfully to skip unmapped parameters automatically.

thanks

[kataras]

So you send "name" and "testkey" but server expects only "name" and that gives you an error. This is useful, that's no the problem, I think the actual solution is to give the error a "context" that you can check and skip on the handler state. Sounds good to you, should I implement something like this to sovle the issue?

[shenkaige]

So you send "name" and "testkey" but server expects only "name" and that gives you an error. This is useful, that's no the problem, I think the actual solution is to give the error a "context" that you can check and skip on the handler state. Sounds good to you, should I implement something like this to sovle the issue?

Thanks for you solution.you are right 👍

[kataras]

Done @shenkaige , the updated example looks like this (note the new IsErrPath):

    app.Post("/form_action", func(ctx iris.Context) {
        visitor := Visitor{}
        err := ctx.ReadForm(&visitor)
        if err != nil && !iris.IsErrPath(err) { // it will ignore error if client sends unexpected fields.
            ctx.StatusCode(iris.StatusInternalServerError)
            ctx.WriteString(err.Error())
        }

        ctx.Writef("Visitor: %#v", visitor)
    })

[shenkaige]

nice，thank you very much.🎉

[kataras]

You are very welcomed!