How to Pass File Directly to esriRequest Instead of Using Form Upload

Question

The esriRequest is used for retrieving data from a remote server or uploading a file. The Request has a Form option which is used If the request is to upload a file. We specify the form element that contains the file input control here (As below sample). request({ url: portalUrl + '/sharing/rest/content/features/generate', content: myContent, form: dom.byId('uploadForm'), handleAs: 'json', load: lang.hitch(this, function (response) { if (response.error) { errorHandler(response.error); return; } var layerName = response.featureCollection.layers[0].layerDefinition.name; addShapefileToMap(response.featureCollection); }), error: lang.hitch(this, errorHandler) });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ Now, I need to pass a file directly to this options instead of using HTML File Dialog and Input. something like var data = "www.domain.com/GIS/App.ZIP"; request({ ...., form: data, .... });‍‍‍‍‍‍ Thanks

JohnGrayson · Answer

Then it's a two step process, first you'll first have to retrieve the file from the mentioned uri (and convert it to a blob/arraybuffer if necessary), then the second step is to use some of the techniques mentioned in the post to send it directly in the form property.  How you retrieve the file from the server will depend on the server and what it allows, ideally you can retrieve the file as a blob or arraybuffer as that will simplify the process (handleAs:"blob" or handleAs:"arraybuffer").

BehrouzHosseini · Answer

Thomas & John , thank you both for replying but what I need is not loading from from client machine! I need to pass the zip file which is sitting on the server. like referencing to a URL in ajax call var data = "www.domain.com/GIS/App.ZIP";

JohnGrayson · Answer

Here's a similar question that might provide some clues: Add attachment without form node  The reason we were able to do this in the mentioned post is because we already had the file/image contents as a blob but, as mentioned by Thomas, obtaining local files directly is as security issue.  You might be able to do this if you already have the file object as a blob, maybe obtained from an external server/service or some other API.