From aab536acdd4b08e2e8c3d4ac43981dfcaf1cc9f8 Mon Sep 17 00:00:00 2001
From: Evgeny Kolesnikov <ekolesni@redhat.com>
Date: Mon, 13 Jul 2020 14:09:52 +0200
Subject: [PATCH] Add CURLOPT_TRANSFER_ENCODING, enable CURLOPT_VERBOSE with
 CURLOPT_DEBUGFUNCTION

Adds a request for compressed Transfer Encoding in the outgoing
HTTP request. If the server supports this and so desires, it can
respond with the HTTP response sent using a compressed
Transfer-Encoding that will be automatically uncompressed by
libcurl on reception.

The CURLOPT_DEBUGFUNCTION callback is used for printing headers and
connection information on VERBOSE level (dD).
---
 src/common/oscap_acquire.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/src/common/oscap_acquire.c b/src/common/oscap_acquire.c
index 551da43f0..666f4f5c9 100644
--- a/src/common/oscap_acquire.c
+++ b/src/common/oscap_acquire.c
@@ -49,6 +49,7 @@
 #include "common/_error.h"
 #include "oscap_string.h"
 #include "oscap_helpers.h"
+#include "debug_priv.h"
 
 #ifndef OSCAP_TEMP_DIR
 #define OSCAP_TEMP_DIR "/tmp"
@@ -288,6 +289,34 @@ oscap_acquire_url_to_filename(const char *url)
 	return filename;
 }
 
+static int _curl_trace(CURL *handle, curl_infotype type, char *data, size_t size, void *userp)
+{
+	const char *title;
+
+	switch (type) {
+	case CURLINFO_TEXT:
+		title = "== cURL info";
+		break;
+	case CURLINFO_HEADER_OUT:
+		title = "=> cURL header (out)";
+		break;
+	case CURLINFO_HEADER_IN:
+		title = "<= cURL header (in)";
+		break;
+	case CURLINFO_DATA_OUT:
+	case CURLINFO_SSL_DATA_OUT:
+	case CURLINFO_DATA_IN:
+	case CURLINFO_SSL_DATA_IN:
+	default:
+		return 0;
+		break;
+	}
+
+	dD("%s: %s", title, data);
+
+	return 0;
+}
+
 char* oscap_acquire_url_download(const char *url, size_t* memory_size)
 {
 	CURL *curl;
@@ -303,7 +332,10 @@ char* oscap_acquire_url_download(const char *url, size_t* memory_size)
 	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_to_memory_callback);
 	curl_easy_setopt(curl, CURLOPT_WRITEDATA, buffer);
 	curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
+	curl_easy_setopt(curl, CURLOPT_TRANSFER_ENCODING, true);
 	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true);
+	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
+	curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, _curl_trace);
 
 	CURLcode res = curl_easy_perform(curl);
 	curl_easy_cleanup(curl);