wget not working to download jar file from maven repo

Question

I'm trying to download a single jar file from the maven repository, from the URL below.

http://repo1.maven.org/maven2/com/google/guava/guava-testlib/10.0/guava-testlib-10.0.jar

• Downloading in a browser works fine, and I get the file as expected.

• 'wget' downloads something, but the file I get doesn't appear to be valid. Running 'jar -tf' on the downloaded file gives 'ZipException: error in opening zip file'.

• Downloading the file programmatically from Java ('InputStream' from the URL writing to a 'FileOutputStream') downloads something and creates the file. Opening that with WinZip/7-Zip, it appears to contain one file named 'guava-testlib-10.0', which looks like the jar archive I was expecting to get.

• wget another jar does work as expected at least sometimes (with -U user agent string)

Is this some dodgy interaction between wget/maven or Java/maven? Is it a malformed jar file that my browser understands and downloads correctly? Both of those seem slightly implausible to me.

Answer 1

wget generally gets blocked from the central maven repo because some people don't play nice and try to wget too much. Try set the user agent:

wget -U "Any User Agent" http://repo1.maven.org/maven2/com/google/guava/guava-testlib/10.0/guava-testlib-10.0.jar