luci json post quirk

luasrc-controller-demo.lua

--[[
   just tries to parse the json posted and reply ok/NAK
--]]
module("luci.controller.rme.demo", package.seeall)
local http = require("luci.http")
local protocol = require("luci.http.protocol")
local json = require("dkjson")
--local json = require("luci.json")

function index()
     --- some valid parent...
    entry({'demo'}, template("rme/remake_start"), "stupid needing parents")
    entry({'demo', 'form_size2'}, call("action_form_size2"), "form_size2")
end

function action_form_size2()
    local http_method = http.getenv("REQUEST_METHOD")
    local rdata = {};
    if http_method == "POST" then
        io.stderr:write("Got post\n")
        if (http.getenv("CONTENT_TYPE"):match("^application/json")) then
            io.stderr:write("Got JSON\n")
            local hc = http.content()
            local input, rc, err = json.decode(hc)
            if input then
                rdata.message = "OK"
                io.stderr:write("Input validated as json ok\n")
            else
                http.status(400, "Bad Request")
                rdata.message = "NAK"
                io.stderr:write("Input failed to validated: ")
                -- luci.json doesn't return errors
                if err then
                    rdata.err = err
                    io.stderr:write(err)
                else
                    rdata.err = "json parsing failed, luci.json"
                end
                io.stderr:write("\n")
            end
            http.prepare_content("application/json")
            http.write(json.encode(rdata))
            http.close()

        end
    end

    luci.template.render("rme/demo_size2")
end

luasrc-view-rme-demo_size2.htm

<%+header%>

<h2>Form size demo</h2>
<input id="btn_save" class="cbi-button cbi-input-apply" type="submit" value="save"/>

<script type="text/javascript" src="/resources/jquery-2.1.1.min.js"></script>
<script type="text/javascript">

    // works
    var b1 = [
        {"unit_id":43,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":41,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":42,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":44,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":46,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":45,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"blah": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},
        {"blah2": "aaaaaaaaaaaaaaa"}
    ];


    // FAILS (the "x"s in "blah2" push it over the limit
    var b2 = [
        {"unit_id":43,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":41,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":42,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":44,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":46,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"unit_id":45,"type":"Water","plugin":{"short_description":"Fake plugin, responds ...","type":"user","description":"Fake plugin, responds to slaves 40-60\n","label":"massive_faker.lua (user)","name":"massive_faker.lua_user","family":"water","original_name":"massive_faker.lua","valid":true,"size":1453}},
        {"blah": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},
        {"blah2": "aaaaaaaaaaaaaaaxxxxxx"}
    ];


    $(document).ready(function () {

        $("#btn_save").click(function (item) {
            console.log("Clicked to save!");

            $.ajax({
                url: location.href,
                contentType: "application/json",
                data: JSON.stringify(b2),
                type: "POST"
            }).done(function (data, status, jqhxr) {
                console.log("Everything posted ok");
            }).fail(function (jqhxr, status, err) {
                console.log("something went wrong: " + err + ": " + jqhxr.responseJSON.err);
            }).always(function() {
                console.log("Always....");
            })

        })
    });

</script>

<%+footer%>