Blame SOURCES/openscap-1.3.4-add_compression_support-PR_1557.patch

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From d8518b70b912aa55fc47400173bf6229e40b71d0 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C5=A0imon=20Luka=C5=A1=C3=ADk?= <isimluk@fedoraproject.org>
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Date: Wed, 8 Jul 2020 15:17:31 +0200
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Subject: [PATCH] Make a use of HTTP header content-encoding: gzip if available
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When fetching remote resources, some servers/CDNs may be able to serve us
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compressed http response even in cases when the original file is not compressed
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XML. libcurl is able to process encoded html for us with no added maintenance
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costs.
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Attached please find a CURL log of fetching plain XML file from Red Hat CDN:
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Downloading: https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL7.xml
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...
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*   Trying 104.90.105.254:443...
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* Connected to www.redhat.com (104.90.105.254) port 443 (#0)
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* ALPN, offering h2
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* ALPN, offering http/1.1
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* successfully set certificate verify locations:
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*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
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  CApath: none
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* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
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* ALPN, server accepted to use h2
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* Server certificate:
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*  subject: businessCategory=Private Organization; jurisdictionC=US; jurisdictionST=Delaware; serialNumber=2945436; C=US; ST=North Carolina; L=Raleigh; O=Red Hat, Inc.; CN=www.redhat.com
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*  start date: Feb 24 00:00:00 2020 GMT
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*  expire date: May 24 12:00:00 2022 GMT
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*  subjectAltName: host "www.redhat.com" matched cert's "www.redhat.com"
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*  issuer: C=US; O=DigiCert Inc; OU=www.digicert.com; CN=DigiCert SHA2 Extended Validation Server CA
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*  SSL certificate verify ok.
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* Using HTTP2, server supports multi-use
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* Connection state changed (HTTP/2 confirmed)
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* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
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* Using Stream ID: 1 (easy handle 0x776c3b0)
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> GET /security/data/oval/com.redhat.rhsa-RHEL7.xml HTTP/2
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Host: www.redhat.com
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accept: */*
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accept-encoding: gzip
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* old SSL session ID is stale, removing
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* Connection state changed (MAX_CONCURRENT_STREAMS == 100)!
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< HTTP/2 200
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< server: Apache
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< last-modified: Wed, 08 Jul 2020 12:41:28 GMT
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< etag: "7f694279-fca5e0-5a9ed6d376a08"
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< accept-ranges: bytes
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< content-type: text/xml
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< content-encoding: gzip
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< content-length: 1766376
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< date: Wed, 08 Jul 2020 13:15:29 GMT
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< vary: Accept-Encoding
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< strict-transport-security: max-age=31536000
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<
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* Connection #0 to host www.redhat.com left intact
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---
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 src/common/oscap_acquire.c | 1 +
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 1 file changed, 1 insertion(+)
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diff --git a/src/common/oscap_acquire.c b/src/common/oscap_acquire.c
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index 60ab62c05..551da43f0 100644
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--- a/src/common/oscap_acquire.c
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+++ b/src/common/oscap_acquire.c
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@@ -302,6 +302,7 @@ char* oscap_acquire_url_download(const char *url, size_t* memory_size)
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 	curl_easy_setopt(curl, CURLOPT_URL, url);
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 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_to_memory_callback);
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 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, buffer);
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+	curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
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 	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true);
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 	CURLcode res = curl_easy_perform(curl);