Fix http2 = false having no effect.
#2977
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Setting `http2 = false` in nix config (e.g. /etc/nix/nix.conf) had no effect, and `nix-env -vvvvv -i hello` still downloaded .nar packages using HTTP/2. In `src/libstore/download.cc`, the `CURL_HTTP_VERSION_2TLS` option was being explicitly set when `downloadSettings.enableHttp2` was `true`, but, `CURL_HTTP_VERSION_1_1` option was not being explicitly set when `downloadSettings.enableHttp2` was `false`. This may be because `https://curl.haxx.se/libcurl/c/libcurl-env.html` states: "You have to set this option if you want to use libcurl's HTTP/2 support." but, also, in the changelog, states: "DEFAULT Since curl 7.62.0: CURL_HTTP_VERSION_2TLS Before that: CURL_HTTP_VERSION_1_1" So, the default setting for `libcurl` is HTTP/2 for version >= 7.62.0. In this commit, option `CURLOPT_HTTP_VERSION` is explicitly set to `CURL_HTTP_VERSION_1_1` when `downloadSettings.enableHttp2` nix config setting is `false`. This can be tested by running `nix-env -vvvvv -i hello | grep HTTP`
nh2
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Jun 28, 2019
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Fixes #2971.
Setting
http2 = falsein nix config (e.g. /etc/nix/nix.conf)had no effect, and
nix-env -vvvvv -i hellostill downloaded .narpackages using HTTP/2.
In
src/libstore/download.cc, theCURL_HTTP_VERSION_2TLSoption wasbeing explicitly set when
downloadSettings.enableHttp2wastrue,but,
CURL_HTTP_VERSION_1_1option was not being explicitly set whendownloadSettings.enableHttp2wasfalse.This may be because
https://curl.haxx.se/libcurl/c/libcurl-env.htmlstates:"You have to set this option if you want to use libcurl's HTTP/2 support."
but, also, in the changelog, states:
"DEFAULT
Since curl 7.62.0: CURL_HTTP_VERSION_2TLS
Before that: CURL_HTTP_VERSION_1_1"
So, the default setting for
libcurlis HTTP/2 for version >= 7.62.0.In this commit, option
CURLOPT_HTTP_VERSIONis explicitly set toCURL_HTTP_VERSION_1_1whendownloadSettings.enableHttp2nix configsetting is
false.This can be tested by running
nix-env -vvvvv -i hello | grep HTTPcc with @nh2