Yeah that makes sense. Thanks.

Chris

On Thursday, November 26, 2020 at 2:50:04 AM UTC-5 ice...@googlemail.com 
wrote:

> The problem  probably is that the centos image is not in the first  30 
> results . You would need to get the next page(s) until you find a centos 
> image.
> See https://docs.docker.com/registry/spec/api/#tags for details. And 
> remember that this endpoint has a limit on the numbe rof requests in a 
> certain timeframe, so be sure to cache the result.
> zil...@gmail.com schrieb am Mittwoch, 25. November 2020 um 16:35:57 UTC+1:
>
>> That's what I essentially have already. Just need the correct 
>> docker_image_tags_url value, and that post didn't tell me.
>>
>> On Wednesday, November 25, 2020 at 10:22:41 AM UTC-5 slide wrote:
>>
>>> This might get you started: 
>>> https://gist.github.com/kizbitz/e59f95f7557b4bbb8bf2
>>>
>>>
>>>
>>> On Wed, Nov 25, 2020 at 7:58 AM zil...@gmail.com <zil...@gmail.com> 
>>> wrote:
>>>
>>>> I essentially want to get this list, but in a JSON format in an HTTP 
>>>> response. But using this link as my docker_image_tags_url value for my 
>>>> script doesn't work of course, that is, it gives a blank list.
>>>>
>>>>
>>>> https://hub.docker.com/r/jenkins/jenkins/tags?page_size=20&page=1&ordering=last_updated
>>>> .
>>>>
>>>> On Wednesday, November 25, 2020 at 9:40:16 AM UTC-5 zil...@gmail.com 
>>>> wrote:
>>>>
>>>>> I want to use the Groovy script in this post 
>>>>> <https://kublr.com/blog/advanced-jenkins-groovy-scripting-for-live-fetching-of-docker-images/>
>>>>>  
>>>>> to get Jenkins versions. So I do this, where I change the 
>>>>> docker_image_tags_url to point to a Jenkins end point.
>>>>>
>>>>> // Import the JsonSlurper class to parse Dockerhub API response
>>>>> import groovy.json.JsonSlurper
>>>>> // Set the URL we want to read from, it is MySQL from official Library 
>>>>> for this example, limited to 20 results only.
>>>>> docker_image_tags_url = "
>>>>> https://hub.docker.com/v2/repositories/library/jenkins/tags?page_size=30
>>>>> "
>>>>> try {
>>>>>     // Set requirements for the HTTP GET request, you can add 
>>>>> Content-Type headers and so on...
>>>>>     def http_client = new URL(docker_image_tags_url).openConnection() 
>>>>> as HttpURLConnection
>>>>>     http_client.setRequestMethod('GET')
>>>>>     // Run the HTTP request
>>>>>     http_client.connect()
>>>>>     // Prepare a variable where we save parsed JSON as a HashMap, it's 
>>>>> good for our use case, as we just need the 'name' of each tag.
>>>>>     def dockerhub_response = [:]    
>>>>>     // Check if we got HTTP 200, otherwise exit
>>>>>     if (http_client.responseCode == 200) {
>>>>>         dockerhub_response = new 
>>>>> JsonSlurper().parseText(http_client.inputStream.getText('UTF-8'))
>>>>>     } else {
>>>>>         println("HTTP response error")
>>>>>         System.exit(0)
>>>>>     }
>>>>>     // Prepare a List to collect the tag names into
>>>>>     def image_tag_list = []
>>>>>     // Iterate the HashMap of all Tags and grab only their "names" 
>>>>> into our List
>>>>>     dockerhub_response.results.each { tag_metadata ->
>>>>>         image_tag_list.add(tag_metadata.name)    
>>>>>     }
>>>>>     // The returned value MUST be a Groovy type of List or a related 
>>>>> type (inherited from List)
>>>>>     // It is necessary for the Active Choice plugin to display results 
>>>>> in a combo-box
>>>>>     return image_tag_list.sort()
>>>>> } catch (Exception e) {
>>>>>          // handle exceptions like timeout, connection errors, etc.
>>>>>          println(e)
>>>>> }
>>>>>
>>>>> However, it just returns Alpine versions. How can I get the CentOS 
>>>>> versions?
>>>>>
>>>>> Thanks,
>>>>> Chris
>>>>>
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>>>> .
>>>>
>>>
>>>
>>> -- 
>>> Website: http://earl-of-code.com
>>>
>>

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