javascript - JSON.stringify = illegal access -
i have array objects in javascript. want save array .json file.
before added objects file, console.log objects.
// client object {id: "1", color: "#00ff00"} object {id: "2", color: "#ff7645"} object {id: "3", color: "#ff8845"} then post jsonarray nodejs server this:
// client $.post('/savejson', 'json=' + json.stringify(jsonarray)) // works catch post , save file in nodejs this:
app.router.post('/savejson', function(data) { url = '/jsonfiles/something.json' // nodejs server fs.writefile(url, data.body.json, function(error) { if(error) { console.log(error) return } console.log('saved file: ' + url) }) now have json file array objects this:
something.json
[ {"id":"1","color":"#00ff00"}, {"id":"2","color":"#ff7645"}, {"id":"3","color":"#ff8845"} ] i read file this:
// nodejs server jsonfile = fs.readfilesync(url, 'utf-8') // output jsonfile: [{"id":"1","color":"#00ff00"},{"id":"2","color":"#ff7645"},{"id":"3","#ff8845"}] parse it
// nodejs server jsonarray = json.parse(jsonfile) // output jsonarray: [{id: '1',color: '#00ff00'},{ id: '2',color: '#ff7645'},{ id: '3',color: '#ff8845'}] and send client
// nodejs server window.newjson(jsonarray) at client catch file with:
// client window.newjson = function(jsonarray) { // here foreach loop } // output jsonarray: undefined[3] 0: color: "#00ff00" id: "1" __proto__: 1: color: "#ff7645" id: "2" __proto__: 2: color: "#ff8845" id: "3" __proto__: length: 3 __proto__: undefined[0] and each object console.log object.
output
// client {id: "1", color: "#00ff00"} {id: "2", color: "#ff7645"} {id: "3", color: "#ff8845"} noticed object word difference.
now want same file saved again this:
// client $.post('/savejson', 'json=' + json.stringify(jsonarray)) // not working anymore... when use json.stringify(jsonarray) @ client side, error: uncaught illegal access
i tried use json.parse(jsonarray) @ client side, 1 give me error uncaught syntaxerror: unexpected token o
when log jsonarray before second post:
// 1 console.log(jsonarray) // result array[3] 0: color: "#00ff00" id: "1" __proto__: 1: color: "#ff7645" id: "2" __proto__: 2: color: "#ff8845" id: "3" __proto__: length: 3 __proto__: array[0] // 2 console.log(jsonarray.tostring()) // result [object object],[object object],[object object] // 3 json.stringify(jsonarray) // result uncaught illegal access // 4 json.parse(jsonarray) // result uncaught syntaxerror: unexpected token o what did wrong? why i'm missing object word?
you have stringify jsonarray before sending client side.
Comments
Post a Comment