Nexus artifact download using CURL

Question

I'm trying to download an artifact uploaded to nexus using CURL. But I'm unable to get it downloaded. The below command execution from command prompt doesn't download the required zip file and I'm using Nexus admin account

curl -X GET -u userid:pwd "http://nexusserver:8081/nexus/service/local/artifact/maven/redirect?r=Repo_Name&g=GroupID&a=artifactID&v=LATEST&p=zip" -O

Did I form the URL correctly? I tried to browse the URL (http://nexusserver:8081/nexus/service/local/artifact/maven/redirect?r=Repo_Name&g=GroupID&a=artifactID&v=LATEST&p=zip), but got HTTP 404 Not found in Nexus Repository Manager. I'm using Nexus version 3.0.2-02. I'm new to nexus and any help is greatly appreciated.

Thanks

Fabian Braun Fabian Braun · Accepted Answer · 2018-08-21T10:08:15

In newer versions of nexus you can:

Use curl to search for a maven artifact in your nexus via the new REST-API
Parse the json-response to extract a download-link
Use curl to download the artifact

On bash this boils down to:

$ curl -sSL -X GET -G "http://mynexus3.local/service/rest/v1/search/assets" \
  -d repository=maven-snapshots \
  -d maven.groupId=my.group.id \
  -d maven.artifactId=my-artifact \
  -d maven.baseVersion=1.0-SNAPSHOT \
  -d maven.extension=jar \
  -d maven.classifier=jar-with-dependencies \
  | grep -Po '"downloadUrl" : "\K.+(?=",)' \
  | xargs curl -fsSL -o my-artifact.jar

The first block will search for your artifact and output something similar to

{
  "items" : [ {
    "downloadUrl" : "http://mynexus3.local/repository/maven-snapshots/my/group/id/my-artifact/1.0-SNAPSHOT/my-artifact-1.0-20180821.085657-1-jar-with-dependencies.jar",
    "path" : "/my/group/id/my-artifact/1.0-SNAPSHOT/my-artifact-1.0-20180821.085657-1-jar-with-dependencies.jar",
    "id" : "foo",
    "repository" : "maven-snapshots",
    "format" : "maven2",
    "checksum" : {
      "sha1" : "bar",
      "md5" : "baz"
    }
  } ],
  "continuationToken" : null
}

Then you can use grep or something similar to extract the download URL. Finally you pass the extracted URL to curl again to download your artifact. (tested with Nexus 3.13)

Nexus artifact download using CURL

5 Answers