# File Upload POST format? **URL:** \ **Category:** API & Custom Code\ **Created:** [September 30, 2018, 2:14pm UTC](https://forums.knack.com/t/file-upload-post-format/9867 "2018-09-30T14:14:34Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![JulianSwal22288](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@JulianSwal22288](https://forums.knack.com/u/JulianSwal22288)\ **Post date:** [September 30, 2018, 2:14pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/1 "2018-09-30T14:14:34Z")
I'm trying to figure out what the files parameter should contain when uploading a file from a windows machine using the api... I'm trying it with Postman to sort out the syntax.. I have this file name: C:\Users\Temp\Documents\Business\Test excel spreadsheet.xls When I use: @C:\Users\Temp\Documents\Business\Test excel spreadsheet.xls I get: {     "errors": [         {             "message": "Please select a file to upload."         }     ] } So, any suggestions? I thought it was the spaces that may have been causing issues, but I tried a file without one, and it also give the same error.. Thanks Julian ---
**Author:** ![KevinLoh49942](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@KevinLoh49942](https://forums.knack.com/u/KevinLoh49942)\ **Post date:** [August 10, 2020, 1:49am UTC](https://forums.knack.com/t/file-upload-post-format/9867/2 "2020-08-10T01:49:32Z")
Dear Greg, thanks for your reply. I still don't get how to use the api anyway ☹️. Wish that someone can guided me with an example of how to use the api..... I also don't quite understand the api call with below url. [https://api.knack.com/v1/pages/](https://api.knack.com/v1/pages/) **scene\_key** /views/ **view\_key** /records as from the documentation, the **scene\_key** need to change to scene\_252 in my case, and **view\_key** need to be view\_1625, so I need to write a javascript program in my site to call the value ? is that correct? I just can't call direct from browser right? Sorry for my stupid questions again, I really don't have knowledge in javascript, I can only write a simple C# program. ---
**Author:** ![GregGould73371](https://avatars.discourse-cdn.com/v4/letter/g/c0e974/32.png) [@GregGould73371](https://forums.knack.com/u/GregGould73371)\ **Post date:** [August 9, 2020, 10:58pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/3 "2020-08-09T22:58:25Z")
Hi Kevin, The assets URL is pointing to your S3 storage and not an API endpoint - it's not going to return anything without a complete file URL, which you get back from the API after you post a new file. The ajax script can be in your API & Code \> JavaScript section or in a custom script file loaded on your site. G ---
**Author:** ![KevinLoh49942](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@KevinLoh49942](https://forums.knack.com/u/KevinLoh49942)\ **Post date:** [August 9, 2020, 3:21pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/4 "2020-08-09T15:21:49Z")
I have 2 questions here...... 1st.... I use my browser for "[https://api.knack.com/v1/applications/{YOUR-APP-ID}/assets/](https://api.knack.com/v1/applications/%7BYOUR-APP-ID%7D/assets/)" I get this error" ``` Cannot GET /v1/applications/5c5befdd0c5efd2cb80d6ff2/assets/" 2nd.... $.ajax({    url: "[https://api.knack.com/v1/pages/{SCENE}/views/{VIEW}/records/](https://api.knack.com/v1/pages/%7BSCENE%7D/views/%7BVIEW%7D/records/)",    type: "POST",    data: {       "field_123":"FILE_ID"    },    headers: {...},    success: function (data) {       // do something with new record data    },    error: function (xhr, ajaxOptions, thrownError) {       // error    } }); all the codes above need to put in the knack api&code? sorry for my stupid questions as I'm very new in knack api. thanks for entertaining my questions. ``` ---
**Author:** ![GregGould73371](https://avatars.discourse-cdn.com/v4/letter/g/c0e974/32.png) [@GregGould73371](https://forums.knack.com/u/GregGould73371)\ **Post date:** [July 29, 2019, 4:50pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/5 "2019-07-29T16:50:49Z")
Hi Stephen, After the file is uploaded, use the "id" field from the returned data for the new file and send a POST request to the data object containing the file connection field to insert a record for the new file: $.ajax({    url: "[https://api.knack.com/v1/pages/{SCENE}/views/{VIEW}/records/](https://api.knack.com/v1/pages/%7BSCENE%7D/views/%7BVIEW%7D/records/)",    type: "POST",    data: {       "field\_123":"FILE\_ID"    },    headers: {...},    success: function (data) {       // do something with new record data    },    error: function (xhr, ajaxOptions, thrownError) {       // error    } }); Hope this helps. ---
**Author:** ![StephenChapman](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.knack.com/stephenchapman/32/1759_2.png) [@StephenChapman](https://forums.knack.com/u/StephenChapman)\ **Post date:** [June 7, 2019, 5:26am UTC](https://forums.knack.com/t/file-upload-post-format/9867/6 "2019-06-07T05:26:03Z")
Hi Greg, I've got step one (uploading the file) working, but I'm struggling with step two, which is creating a new record in the object, and referencing the file ID. Do you have an example snippet? ---
**Author:** ![GregGould73371](https://avatars.discourse-cdn.com/v4/letter/g/c0e974/32.png) [@GregGould73371](https://forums.knack.com/u/GregGould73371)\ **Post date:** [February 25, 2019, 9:03pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/7 "2019-02-25T21:03:39Z")
Your S3 bucket for the project.  [https://api.knack.com/v1/applications/{YOUR-APP-ID}/assets/](https://api.knack.com/v1/applications/%7BYOUR-APP-ID%7D/assets/) ---
**Author:** ![vaibhavsha18338](https://avatars.discourse-cdn.com/v4/letter/v/7c8e57/32.png) [@vaibhavsha18338](https://forums.knack.com/u/vaibhavsha18338)\ **Post date:** [February 24, 2019, 3:14pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/8 "2019-02-24T15:14:04Z")
what is ASSETS\_URL ---
**Author:** ![GregGould73371](https://avatars.discourse-cdn.com/v4/letter/g/c0e974/32.png) [@GregGould73371](https://forums.knack.com/u/GregGould73371)\ **Post date:** [November 1, 2018, 3:49pm UTC](https://forums.knack.com/t/file-upload-post-format/9867/9 "2018-11-01T15:49:48Z")
Not sure what your using, but I have the following AJAX settings for JavaScript API file uploads...works fine. ... var file = document.getElementById(FILE\_INPUT\_ID).files[0]; var form = new FormData(); form.append("files", file); var settings = {   "async": true,   "crossDomain": true,   "url": ASSETS\_URL + "file/upload",  // change 'file' to 'image' if uploading images   "method": "POST",   "headers": KNACK\_HEADERS,   "processData": false,   "contentType": false,   "mimeType": "multipart/form-data",   "data": form,   "success": function (data) {      //..   },   "error": function(response) {      //...  } } $.ajax(settings).done(function (response) {  // returns JSON with file details    //...do something with response }); ...