[OE-core] [PATCH 3/3] cve-update-db: refresh once every 24 hours

[akuster808]

On 7/18/19 1:04 PM, Ross Burton wrote:
> Check the mtime of the database before updating, and if it's less than 24 hours
> ago don't refresh.  This saves the HTTP fetches to determine if the data has
> been updated.
>
> Signed-off-by: Ross Burton <ross.burton at intel.com>
> ---
>  meta/recipes-core/meta/cve-update-db-native.bb | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/meta/recipes-core/meta/cve-update-db-native.bb b/meta/recipes-core/meta/cve-update-db-native.bb
> index cabbde5066c..2afca94fc6b 100644
> --- a/meta/recipes-core/meta/cve-update-db-native.bb
> +++ b/meta/recipes-core/meta/cve-update-db-native.bb
> @@ -22,7 +22,7 @@ python do_populate_cve_db() {
>      Update NVD database with json data feed
>      """
>  
> -    import sqlite3, urllib, shutil, gzip, re
> +    import sqlite3, urllib, shutil, gzip, re, time
>      from datetime import date
>  
>      BASE_URL = "https://nvd.nist.gov/feeds/json/cve/1.0/nvdcve-1.0-"
> @@ -37,6 +37,11 @@ python do_populate_cve_db() {
>      if not os.path.isdir(db_dir):
>          os.mkdir(db_dir)
>  
> +    expiry = time.time() - (60*60*24) # This time yesterday
> +    if os.path.exists(db_file) and expiry < os.path.getmtime(db_file):
> +        bb.note("CVE data updated less than 24 hours ago, not refreshing. Delete %s to force update." % db_file)
> +        return

Any reason this can't be configurable?

- armin
> +
>      # Connect to database
>      conn = sqlite3.connect(db_file)
>      c = conn.cursor()