upload_trailer_image
The upload_trailer_image function is used to attach an image to a trailer.
svc=resource/upload_trailer_image¶ms={"itemId":<long>,
"trailerId":<long>,
"eventHash":"<text>",
"oldItemId":<long>,
"oldTrId":<uint>}
&sid="<text>"
To delete the image, use the update_trailer function.
Parameters
| Name | Description |
|---|---|
| itemId | Resource ID. |
| trailerId | Trailer ID. |
| eventHash | The name of the event which should be generated after attaching the image. Optional parameter. |
| oldItemId | The resource ID from which the trailer image should be copied. Optional parameter. |
| oldTagId | The trailer ID the image of which should be copied. Optional parameter. |
To upload an image, use a POST request with multiple contents (multipart/form-data), where one part contains the parameters and the other contains the image.
Example:
Request URL:https: //hst-api.wialon.com/wialon/ajax.html?svc=resource/upload_trailer_image
Request Method: POST
Host: hst-api.wialon.com
Connection: keep-alive
Content-Length: 31756
Cache-Control: no-cache
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryLjl26xgAWBYzO713
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
------WebKitFormBoundaryLjl26xgAWBYzO713
Content-Disposition: form-data; name="params"
{"itemId":717314,"trailerId":6,"eventHash":"jUploadForm1372768935931"}
------WebKitFormBoundaryLjl26xgAWBYzO713
Content-Disposition: form-data; name="eventHash"
jUploadForm1372768935931
------WebKitFormBoundaryLjl26xgAWBYzO713
Content-Disposition: form-data; name="trailers_dlg_props_upload_image"; filename="image.jpg"
Content-Type: image/jpeg
------WebKitFormBoundaryLjl26xgAWBYzO713--
It is also possible to copy an image from another trailer. To do this, execute a request with no image but with the oldItemId and oldTagId fields.
Returned result
If the request is successful, an empty JSON is returned.
{ }
If not, an error code is returned. Possible error codes:
| Code | Description |
|---|---|
| 7 | Failed to fetch the item with the desired ACL (ADF_ACL_AVL_RES_EDIT_TRAILERS) or the item/trailer with the old_id not found (when copying the image from another trailer). |
| 6 | Undefined error. |
| 4 | Wrong input parameters. |
To make sure that the image has been uploaded, execute the avl_evts request:
{
"tm":<uint>, /* current server time (UTC) */
"events":[
{
"i":<long>, /* trailer ID (-1 if unknown) */
"d":{ /* data */
"hash":"<text>" /* the uploading is complete */
}
}
]
}