Below are environment variables that effect Heritrix operation. It should point to the Java installation on the machine. Usually the admin webapp is mounted on root: i. This property takes no arguments. When this property is set, the conf and webapps directories will be found in their development locations and startup messages will show on the text console standard out.

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Overrides Submit job Each of the first 4 buttons corresponds to a section of the crawl configuration that can be modified. Modules refers to selecting which pluggable modules classes to use.

It does not include the use of pluggable filters which are configurable via the second option. Settings refers to setting the configurable values on modules pluggable or otherwise. Overrides refers to the ability to set alternate values based on which domain the crawler is working on. Clicking on any of these 4 will cause the job to be created but kept from being run until the user finish configuring it. The user will be taken to the relevant page.

More on these pages in a bit. Submit job button will cause the job to be submitted to the pending queue right away. It can still be edited while in the queue or even after it starts crawling although modules and filters can only be set prior to the start of crawling.

If the crawler is set to run and there is no other job currently crawling, the new job will start crawling at once. Note that some profiles may not contain entirely default valid settings.

The software requires that User-Agent value be of the form The From value must be an email address. Note, the state running generally means that the crawler will start executing a job as soon as one is made available in the pending jobs queue as long as there is not a job currently being run. If the crawler is not in the running state, jobs added to the pending jobs queue will be held there in stasis; they will not be run, even if there are no jobs currently being run.

The term crawling generally refers to a state whereby a job being currently run crawled : i. Note that if a crawler is set to the not run state, a job currently running will continue to run. In other words, a job that started before the crawler was stopped will continue running.

In that scenario once the current job has completed, the next job will not be started. Modules This page allows the user to select what URIFrontier implementation to use select from combobox and to configure the chain of processors that are used when processing a URI. Note that the order of display top to bottom is the order in which processors are run. Options are provided for moving processors up, down, removing them and adding those not currently in the chain.

Those that are added are placed at the end by default, Generally the user should then move them to their correct location. Filters Certain modules Scope, all processors, the OrFilter for example will allow an arbitrary number of filters to be applied to them.

This page presents a treelike structure of the configuration with the ability to add, remove, and reorder filters. For each grouping of filters the options provided correspond to those that are provided for processors. Note however that since filters can contain filters the lists can become complicated.

In this case however an input field is provided for each configurable parameter of each module. Navigation to other parts of the admin interface will cause the job to be lost. Overrides This page provides an iterative list of domains that contain override settings, that is values for parameters that override values in the global configuration.

The main difference is that each input field is preceded by a checkbox. If a box is checked, the value being displayed overrides the global configuration. Therefore, to override a setting, remember to add a check in front of it. Removing a c heck effectively removes the override. Changes made to non-checked fields will be ignored.

It is not possible to override what modules are used in an override. By overriding it and setting it to false you can disable that processor. It is even possible to have it set to false by default and only enable it on selected domains. Thus any arbitrary chain of processors can be created for each domain with one major exception. It is not possible to manipulate the order of the processors. It is also possible to add filters. You can not affect the order of inherited filters, and you can not interject new filters among them.

Override filters will be run after inherited filters. Run Once a job is in the pending queue the user can go back to the Console and start the crawler. The option to do so is presented just below the general information on the state of the crawler to the far left. Once started the console will offer summary information about the progress of the crawl and the option of terminating it. It is the central page for monitoring and managing a running job.

However more detailed reports and actions are possible from other pages. Every single page in the admin interface displays the same info header. It tells you if the crawler is running or crawling a job i. Information about the number of pending and completed jobs is also provided. As noted in the chapter about launching jobs via the WUI you cannot modify the pluggable modules but you can change the configurable parameters that they possess.

This page also gives access to a list of pending jobs.



Edit next to the permission for which you sent the request letter. Click Save to close the Harvest Authorisation. To start editing, go to the harvest authorisation search page, find the harvest authorisation you wish to edit, and click the - Edit details icon from the Actions column. This will load the harvest authorisation into the editor. Note that some users will not have access to edit some or any harvest authorisations. An alternative to editing a harvest authorisation is to click the - View details icon to open the harvest authorisation viewer. Data cannot be changed from within the viewer.


Alex Osborne edited this page Mar 5, This is the public wiki for the Heritrix archival crawler project. Since our crawler seeks to collect and preserve the digital artifacts of our culture for the benefit of future researchers and generations, this name seemed apt. All topical contributions to this wiki corrections, proposals for new features, new FAQ items, etc. Register using the link near the top-right corner of this page. Heritrix is designed to respect the robots.

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