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Add a way of 'harvesting' a set of files via a list of URLs
Since there was too much duplication in the different methods for CRUDing harvest configurations these have been combined into a single controller which dispatches to the appropriate service as necessary. On the frontend there is also a new way of resizing certain modal dialogs and some other UI tweaks. Partial fix for EHRI#1403
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12 changes: 12 additions & 0 deletions
12
etc/db_migrations/20220207_add_import_url_set_config_table.sql
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| CREATE TABLE import_url_set_config ( | ||
| repo_id VARCHAR(50) NOT NULL, | ||
| import_dataset_id VARCHAR(50) NOT NULL, | ||
| url_map JSONB NOT NULL, | ||
| created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, | ||
| comments TEXT, | ||
| PRIMARY KEY (repo_id, import_dataset_id), | ||
| CONSTRAINT import_url_set_config_repo_id_import_dataset_id | ||
| FOREIGN KEY (repo_id, import_dataset_id) | ||
| REFERENCES import_dataset (repo_id, id) | ||
| ON DELETE CASCADE | ||
| ); |
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135 changes: 135 additions & 0 deletions
135
modules/admin/app/actors/harvesting/UrlSetHarvester.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| package actors.harvesting | ||
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| import actors.LongRunningJob.Cancel | ||
| import actors.harvesting.Harvester.HarvestJob | ||
| import akka.actor.Status.Failure | ||
| import akka.actor.{Actor, ActorLogging, ActorRef} | ||
| import akka.stream.scaladsl.Source | ||
| import akka.util.ByteString | ||
| import models.{BasicAuthConfig, UrlNameMap, UrlSetConfig, UserProfile} | ||
| import play.api.http.HeaderNames | ||
| import play.api.libs.ws.{WSAuthScheme, WSClient} | ||
| import services.storage.FileStorage | ||
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| import java.time.{Duration, LocalDateTime} | ||
| import scala.concurrent.Future.{successful => immediate} | ||
| import scala.concurrent.{ExecutionContext, Future} | ||
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| object UrlSetHarvester { | ||
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| // Internal message we send ourselves | ||
| sealed trait UrlSetAction | ||
| private case class Fetch(urls: List[UrlNameMap], count: Int, fresh: Int) extends UrlSetAction | ||
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| /** | ||
| * A description of an URL set harvest task. | ||
| * | ||
| * @param config the endpoint configuration | ||
| * @param prefix the path prefix on which to save files, after | ||
| * which the item identifier will be appended | ||
| */ | ||
| case class UrlSetHarvesterData( | ||
| config: UrlSetConfig, | ||
| prefix: String, | ||
| ) | ||
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| /** | ||
| * A single harvest job with a unique ID. | ||
| */ | ||
| case class UrlSetHarvesterJob(repoId: String, datasetId: String, jobId: String, data: UrlSetHarvesterData) | ||
| extends HarvestJob | ||
| } | ||
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| case class UrlSetHarvester (client: WSClient, storage: FileStorage)( | ||
| implicit userOpt: Option[UserProfile], ec: ExecutionContext) extends Actor with ActorLogging { | ||
| import Harvester._ | ||
| import UrlSetHarvester._ | ||
| import akka.pattern.pipe | ||
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| override def receive: Receive = { | ||
| // Start the initial harvest | ||
| case job: UrlSetHarvesterJob => | ||
| val msgTo = sender() | ||
| context.become(running(job, msgTo, 0, 0, LocalDateTime.now())) | ||
| msgTo ! Starting | ||
| msgTo ! ToDo(job.data.config.urlMap.size) | ||
| self ! Fetch(job.data.config.urls.toList, 0, 0) | ||
| } | ||
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| // The harvest is running | ||
| def running(job: UrlSetHarvesterJob, msgTo: ActorRef, done: Int, fresh: Int, start: LocalDateTime): Receive = { | ||
| // Harvest an individual item | ||
| case Fetch(item :: rest, count, fresh) => | ||
| log.debug(s"Calling become with new total: $count") | ||
| context.become(running(job, msgTo, count, fresh, start)) | ||
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| copyItem(job, item).map { case (name, isFresh) => | ||
| msgTo ! DoneFile(name) | ||
| Fetch(rest, count + 1, if (isFresh) fresh + 1 else fresh) | ||
| }.pipeTo(self) | ||
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| // Finished harvesting this resource list | ||
| case Fetch(Nil, done, fresh) => | ||
| msgTo ! Completed(done, fresh, time(start)) | ||
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| // Cancel harvest | ||
| case Cancel => | ||
| msgTo ! Cancelled(done, fresh, time(start)) | ||
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| case Failure(e) => | ||
| msgTo ! e | ||
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| case m => | ||
| log.error(s"Unexpected message: $m: ${m.getClass}") | ||
| } | ||
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| private def copyItem(job: UrlSetHarvesterJob, item: UrlNameMap): Future[(String, Boolean)] = { | ||
| // Strip the hostname from the file URL but use the | ||
| // rest of the path | ||
| val name = item.name | ||
| val path = job.data.prefix + name | ||
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| val req = job.data.config.auth.fold(client.url(item.url)) { case BasicAuthConfig(username, password) => | ||
| client.url(item.url).withAuth(username, password, WSAuthScheme.BASIC) | ||
| } | ||
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| req.head().flatMap { headReq => | ||
| val etag: Option[String] = headReq.headerValues(HeaderNames.ETAG).headOption | ||
| val ct: Option[String] = headReq.headerValues(HeaderNames.CONTENT_TYPE).headOption | ||
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| // file metadata | ||
| val meta = Map( | ||
| "source" -> "download", | ||
| "download-endpoint" -> item.url, | ||
| "download-job-id" -> job.jobId, | ||
| ) ++ etag.map(tag => "hash" -> tag) | ||
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| log.debug(s"Item: $meta") | ||
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| storage.info(path).flatMap { | ||
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| // If it exists and matches we've got nowt to do.. | ||
| case Some((_, userMeta)) if userMeta.contains("hash") && userMeta.get("hash") == etag => | ||
| immediate(("~ " + name, false)) | ||
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| // Either the hash doesn't match or the file's not there yet | ||
| // so upload it now... | ||
| case _ => | ||
| val bytes: Future[Source[ByteString, _]] = req.get().map(r => r.bodyAsSource) | ||
| bytes.flatMap { src => | ||
| storage.putBytes( | ||
| path, | ||
| src, | ||
| ct, | ||
| meta = meta | ||
| ).map { _ => ("+ " + name, true) } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| private def time(from: LocalDateTime): Long = | ||
| Duration.between(from, LocalDateTime.now()).toMillis / 1000 | ||
| } |
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