fix(fetcher/redhat): fetch through proxy

[MaineK00n]

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What did you implement:

Fixes #409

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

$ pwd
/home/user/goval-dictionary

$ cat Dockerfile
FROM golang:alpine as builder

RUN apk add --no-cache \
        git \
        make

RUN git clone -b MaineK00n/poxy https://github.com/vulsio/goval-dictionary.git
RUN cd goval-dictionary && make install

FROM alpine:3.16

LABEL maintainer sadayuki-matsuno

ENV LOGDIR /var/log/goval-dictionary
ENV WORKDIR /goval-dictionary

RUN apk add --no-cache ca-certificates \
    && mkdir -p $WORKDIR $LOGDIR

COPY --from=builder /go/bin/goval-dictionary /usr/local/bin/

VOLUME ["$WORKDIR", "$LOGDIR"]
WORKDIR $WORKDIR
ENV PWD $WORKDIR

ENTRYPOINT ["goval-dictionary"]
CMD ["--help"]

$ cat docker-compose.yaml 
services:
  app:
    build: .
    networks:       
      - app_internal
  proxy:
    image: sameersbn/squid:3.5.27-2    
    restart: always
    hostname: squid
    ports:
      - "127.0.0.1:3128:3128"
    networks:
      - app_internal
      - proxy_network
    entrypoint: >
      sh -c '
        sed -i -E "s/#\s*(acl localnet src)/acl localnet src/g" /etc/squid/squid.conf
        sed -i -E "s/#\s*(http_access allow localnet)/http_access allow localnet/g" /etc/squid/squid.conf
        /usr/sbin/squid -N
      '
      
networks:
  app_internal:
    internal: true
  proxy_network:

$ docker compose up -d

$ docker compose run --rm app fetch redhat 5
INFO[07-11|11:08:42] Fetching...                              URL=https://access.redhat.com/security/data/archive/oval_v1_20230706.tar.gz
Failed to fetch files. err: Failed to fetch OVALv1. err: Failed to fetch. err: [Failed to download. err: Get "https://access.redhat.com/security/data/archive/oval_v1_20230706.tar.gz": dial tcp: lookup access.redhat.com on 127.0.0.11:53: server misbehaving]

$ docker compose run --rm app fetch redhat 5 --http-proxy http://squid:3128
INFO[07-11|11:09:04] Fetching...                              URL=https://access.redhat.com/security/data/archive/oval_v1_20230706.tar.gz
INFO[07-11|11:09:05] Fetched                                  File=com.redhat.rhsa-RHEL5-ELS.xml Count=1172 Timestamp=2021-07-20T20:31:14
WARN[07-11|11:09:05] The fetched OVAL has not been updated for 3 days, the OVAL URL may have changed, please register a GitHub issue. GitHub=https://github.com/vulsio/goval-dictionary/issues OVAL=https://access.redhat.com/security/data/archive/oval_v1_20230706.tar.gz/com.redhat.rhsa-RHEL5-ELS.xml Timestamp=2021-07-20T20:31:14
INFO[07-11|11:09:06] Fetched                                  File=com.redhat.rhsa-RHEL5.xml Count=1172 Timestamp=2023-04-05T15:46:45
WARN[07-11|11:09:06] The fetched OVAL has not been updated for 3 days, the OVAL URL may have changed, please register a GitHub issue. GitHub=https://github.com/vulsio/goval-dictionary/issues OVAL=https://access.redhat.com/security/data/archive/oval_v1_20230706.tar.gz/com.redhat.rhsa-RHEL5.xml Timestamp=2023-04-05T15:46:45
INFO[07-11|11:09:06] Refreshing...                            Family=redhat Version=5
INFO[07-11|11:09:06] Inserting new Definitions... 
1172 / 1172 [-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------] 100.00% 36492 p/s
INFO[07-11|11:09:06] Finish                                   Updated=1172

Checklist:

You don't have to satisfy all of the following.

• Write tests
• Write documentation
• Check that there aren't other open pull requests for the same issue/feature
• Format your source code by make fmt
• Pass the test by make test
• Provide verification config / commands
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES

Reference

[shino]

🥇