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Memento TimeMaps list identifiers for archival web captures (URI-Ms). When some URI-Ms are dereferenced, they redirect to a different URI-M instead of a unique representation at the datetime. This suggests that confidently obtaining an accurate count quantifying the number of non-forwarding captures for an Original Resource URI (URI-R) is not possible using a TimeMap alone and that the magnitude of...
We use the ServiceWorker (SW) API to intercept HTTP requests for embedded resources and reconstruct Composite Mementos without the need for conventional URL rewriting typically performed by web archives. URL rewriting is a problem for archival replay systems, especially for URLs constructed by JavaScript, that frequently results in incorrect URI references. By intercepting requests on the client using...
The Memento protocol makes it easy to build a uniform lookup service to aggregate the holdings of web archives. However, there is a lack of tools to utilize this capability in archiving applications and research projects. We created MemGator, an open source, easy to use, portable, concurrent, cross-platform, and self-documented Memento aggregator CLI and server tool written in Go. MemGator implements...
To facilitate permanence and collaboration in web archives, we built Interplanetary Wayback to disseminate the contents of WARC files into the IPFS network. IPFS is a peer-to-peer content-addressable file system that inherently allows deduplication and facilitates opt-in replication. We split the header and payload of WARC response records before disseminating into IPFS to leverage the deduplication,...
With the proliferation of public web archives, it is becoming more important to better profile their contents, both to understand their immense holdings as well as to support routing of requests in the Memento aggregator. To save time, the Memento aggregator should only poll the archives that are likely to have a copy of the requested URI. Using the crawler index files produced after crawling, we...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.