[Backlogmanager] [FIWARE-JIRA] (HELP-13407) [fiware-stackoverflow] Download blob from fiware object-storage

[Fernando Lopez (JIRA)]

     [ https://jira.fiware.org/browse/HELP-13407?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fernando Lopez deleted HELP-13407:
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> [fiware-stackoverflow] Download blob from fiware object-storage
> ---------------------------------------------------------------
>
>                 Key: HELP-13407
>                 URL: https://jira.fiware.org/browse/HELP-13407
>             Project: Help-Desk
>          Issue Type: Monitor
>            Reporter: Backlog Manager
>              Labels: fiware, fiware-wirecloud
>
> Created question in FIWARE Q/A platform on 26-06-2014 at 18:06
> {color: red}Please, ANSWER this question AT{color} https://stackoverflow.com/questions/24436153/download-blob-from-fiware-object-storage
> +Question:+
> Download blob from fiware object-storage
> +Description:+
> I am facing problems using ObjectStorageAPI to manage files in FIWARE object storage.
> Having written a set of widgets/operators that create images and upload them onto object-storage, I would like to be able to download these files at any given instance. However, it seems that i am not able to do so.
> After having been authenticated, i list the container contents and, then, i try to download the file i need, specified by the global variable file_name, as follows:
> function onGetAuthTokenSuccess(new_token, data){
>     ...
>     api = new ObjectStorageAPI(object_storage);
>     api.listContainer(container, {
>         token: token,
>         onSuccess: onListContainterSuccess,
>         onFailure: function () {
>             alert("Could not find container " + container + " in region " + region);
>         }
>     });
> }
> function onListContainterSuccess(file_list) {
>     api.getFile(container, file_name, {
>         token: token,
>         onSuccess: onDownloadFileSuccess,
>         onFailure: function () {
>             alert("Could not successfully download " + file_name);
>         }
>     });
> }
> function onDownloadFileSuccess(blob){
>     console.log(JSON.stringify(blob));
>     ....
> }
> Running the above code results in an output like the following:
>  {"type":"image/png","size":45590}
> Without any other information given.
> At the same time, my browser's network monitor suggests that the transaction actually took place correctly as the (unformatted and shrinked) response payload was:
> {"mimetype":"image/png","metadata":{},"valuetransferencoding":"base64","value":"iVBORw0KGgoAAAANSUhEUgAAA0MAAAE2CAYAAACjsEm0AAAgAElEQVR4Xux9CZgU1dX26Z5935kZlmGTRTZl00iMS4iExEQ0RI2JCyayCAqCGCIiYlBj0KhgDEKQfMQvGvJnUYwmBv0kMQaMISoo+47sMiyzz3RP.....m1YaNpGAAAAABJRU5ErkJggg=="}
> The HTTP status is either 200 or 304, which should be considered normal.
> Please note that i am able to download the requested file normally via the fiware portal UI.
> Any ideas on how i should proceed to actually get the file in a correct manner?



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