Can we download an image and display it in HTML using CS REST API?

I'm very new to the world of OpenText and HTML and I am learning both as I go.

I have been able to get a simple HTML page where the user can select an image from his computer and upload it to OpenText using the REST API. At the same time, I create a IMG tag that displays the uploaded image.

Now, I would like to create a webreport that will display thumbnails of all the uploaded images. I'm assuming I have to use "v1/nodes/{id}/content"

(https://developer.opentext.com/webaccess/#url=/awd/resources/apis/cs-rest-api-for-cs-16-s#!/nodes/getContent_get_9&tab=501)

but I can't figure out how to convert that data to an image (if it is indeed the image data that was retrieved).

I know this is probably more of an HTML question, but I feel the result of the api call is in a specific format that I have to understand before I can place it in an HTML page.

I'd appreciate any nudge in the right direction.

Thanks.

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Appu Nair

Since a WR is a Livelink Page any image will obey standard html tags . So if an object has a DataiD of 1234 a relative URL of the form ?func=ll&objectid=1234. Or click the image in your livelink and take the ensuing fetch URL will that work for you in a image tag img src = c:\\ can be replaced by a livelink fetch URL

Appu Nair

Or in true WR fashion if you put this URL to a WR without source say like a header(WR has a haeder ,row and footer)
I have a GIF I added as a document and when I hit the open it will be
http://localhost/OTCS/livelink.exe/35718/activeview.gif?func=doc.Fetch&nodeid=35718&viewType=1

forget the localhost part and if you concentrate on the 35718 which is the DataId part I could write this as

[LL_REPTAG_"35718" LLURL:FETCH /]
<img src="[LL_REPTAG_"35718" LLURL:FETCH /]" alt="Smiley face">

Now this would only work in WR because to execute a WR you are in LL Territory and you have been authorized

If you wanted that same file to be shown in an external application REST would have to do some things which I do not know
but I thought this much.

Appu Nair

another aspect all modern Livelink has inbuilt capabilities of producing thumbnails, essentially a thumbnail is a rendition of a big high res document and it is not something that you point to a big document and use pixel correction .So you could try that.OT also produces a highly popular product called Artesia(DAM) which by nature is not a DMS but an Audio/Video streaming kind of software.

David Ethier

Thanks for your quick replay @Appu_Nair .
Everything you have mentioned makes sense, but I can't get it to work.

I came across a post that mentioned that the 'Open' feature may have to be enabled by our admin. Maybe that's what preventing it from working?

Appu Nair

Yes, the Open command is disabled by default. It is found in administration under Presentation Options. You might further check it by going and adding a GIF image and using the presentation button of a Folder. It will ask you to pick a GIF for which you have to point to the existing GIF. If that works use F12 Developer tools to look at that code may give you hints. Most companies do not like the overview page and they turn it off .

David Ethier

Thanks @Appu_Nair ! The enabling of the Open command worked for getting the image.

However, you now have me wondering about the thumbnails. I know the REST API has something about thumbnails, but is there a way of getting the thumbnails with LL tags for webreports? I couldn't find it in the TAG Guide.

Appu Nair

This is the relation for a simple Object.

ObjectID,DataID is an indicator usually in DTREE.DataID
If you add a Document then it gets added to DVersData.DocID and ProviderData for the actual file.
although in my screencap I havent shown the real file.It is a almost well known in LR/schema circles.

So for any Document that can be identified in Livelink one can write

so a WR is basically a mechanism to execute a Query and provide results

A rendition is a VerType of NOT NULL and in this case, an OTTHUMBNAIL is very much in the database

I don't know how to retrieve it with WR but with REST it is possible so is with SOAP & Oscript

Oscript is used to create tags in WR so one could create it if needed

Appu Nair

Oh I almost forgot to use the RESTCLIENT in WR as in a simple example REST can be executed from a WR page it takes a lot of getting used to so start with the utmost simple example since I do not program much in the REST area my understanding is when you execute something in REST you are given a JSON string which is name-value pairs and you are supposed to paint your pictures. It may help you tremendously if you use the SMART UI of LL which is executing REST which you can see by viewing the page in Fiddler or the JS console.

David Ethier

@Appu_Nair Just wanted to say thanks. I have everything working for my project. You were super helpful. Is there a way to award badges in these OpenText forums?

Appu Nair

You are welcome and you can pay it forward! You can also buy me beer

Appu Nair

@David Ethier said:
@Appu_Nair Just wanted to say thanks. I have everything working for my project. You were super helpful. Is there a way to award badges in these OpenText forums?

BTW could you post how you made that thumbnail show with REST or something else...

David Ethier

@Appu_Nair I used this answer to help me display it: https://stackoverflow.com/a/25334606.

The REST api is this one: https://developer.opentext.com/webaccess/#url=/awd/resources/apis/cs-rest-api-for-cs-16-s#!/nodes/thumbnailContentBySize_get_19&tab=501.