To read data from a WLP file, use the command exchange/import_json:

svc=exchange/import_json&params={"eventHash":<text>}

 Current request can’t be executed simultaneously with any request from this chapter and following requests:

• report/exec_report,
• report/export_result,
• report/get_result_chart,
• report/get_result_map,
• messages/load_interval,
• render/create_messages_layer,
• unit/get_trips,
• resource/get_driver_bindings,
• resource/get_trailer_bindings,
• account/get_account_history.

To load a WLP file, use a POST request with multiple contents (multipart/form-data).

For example:

Request URL: https://hst-api.example.com/example/ajax.html?svc=exchange/import_json&sid=8157df114c0e601f0f31091c3c2ac53d
Request Method: POST
Connection: keep-alive
Content-Length: 1901
Cache-Control: no-cache
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryhAXcAjtvh1D61XpC
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.3
Accept-Encoding: gzip,deflate,sdch
Accept-Language: ru,en-US;q=0.8,en;q=0.6

------WebKitFormBoundaryhAXcAjtvh1D61XpC
Content-Disposition: form-data; name="params"

{"eventHash":"jUploadForm1372772377019"}
------WebKitFormBoundaryhAXcAjtvh1D61XpC
Content-Disposition: form-data; name="eventHash"

jUploadForm1372772377019
------WebKitFormBoundaryhAXcAjtvh1D61XpC
Content-Disposition: form-data; name="import_file"; filename="file.zip"
Content-Type: application/zip


------WebKitFormBoundaryhAXcAjtvh1D61XpC--

{}	/* empty object if execution successful, if not - error code */

To be sure that data has been read, you can execute the command Events:

{
	"tm":<uint>,				/* current server time (UTC) */
	"events":[
		{
			"i":-1,			
			"d":{			/* data */
				"hash":<text>,		/* upload is complete */
				files: {		/* files uploaded */
					<text>:<Object>,	/* file name: file data */
					...
				}	
			}
		}
	]
}