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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (JENA-1604) Add request hook for HTTP query execution
Date Fri, 14 Sep 2018 21:46:00 GMT

    [ https://issues.apache.org/jira/browse/JENA-1604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16615430#comment-16615430
] 

ASF GitHub Bot commented on JENA-1604:
--------------------------------------

Github user ajs6f commented on the issue:

    https://github.com/apache/jena/pull/469
  
    Great, thanks @nirajpatel! I'll wait a couple of days in case anyone has comments, or
if another committer approves I'll go ahead and merge. This is a pretty low-impact changeset.


> Add request hook for HTTP query execution
> -----------------------------------------
>
>                 Key: JENA-1604
>                 URL: https://issues.apache.org/jira/browse/JENA-1604
>             Project: Apache Jena
>          Issue Type: Task
>          Components: Jena
>            Reporter: Niraj Patel
>            Assignee: A. Soroka
>            Priority: Critical
>
> I am using Jena's QueryEngineHTTP for queries and RemoteUpdateRequest for updates. I
would like to send a custom header that will differ on each request. Our database, Allegrograph,
allows us to pass down custom headers while querying or updating in order to store that information
in access logs. For each SPARQL request we want to send down unique request markers and usernames
in order to be able to trace from a UI click to backend calls to queries that were performed
in the graph. I did some digging around and it seems like it's not possible. Using default
headers when configuring Apache's Http Client wouldn't work in this case. The suggestion
[~andy.seaborne] made was to create a request hook in HttpOp where we could add additional
headers as necessary. 



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