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http: switch default parser to llhttp #24870

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http: switch default parser to llhttp #24870

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5 changes: 1 addition & 4 deletions configure.py
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Original file line number Diff line number Diff line change
Expand Up @@ -187,7 +187,7 @@
parser.add_option('--experimental-http-parser',
action='store_true',
dest='experimental_http_parser',
help='use llhttp instead of http_parser by default')
help='(no-op)')
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Also happy to remove this completely if that’s preferred.

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If we are going to land this patch fairly soon (before April), it's probably easier if we simply flip the default value of the build time switch but do not actually remove it, and postpone the actual removal of the code until we have more usage in the wild.

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@joyeecheung The thing is … is there a way to flip the default value here? How do we do that? I assume we could introduce a new flag --no-experimental-http-parser or so, but that seems … idk?

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Does adding default=True here work? (From what I can tell it should do the trick?)

Also I just notice that we have a bunch of '--shared-http-parser*` flags below, should we change the help text of them as well? (They should be practically turned into noops by this patch since the library is not actually used?) EDIT: oh, nvm, they still work if you use the runtime switch..

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@addaleax addaleax Dec 6, 2018 •
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@joyeecheung That would leave us with no way to turn it off (at build time), right? So it’s the same as making this a no-op?


shared_optgroup.add_option('--shared-http-parser',
action='store_true',
Expand Down Expand Up @@ -1117,9 +1117,6 @@ def configure_node(o):
else:
o['variables']['node_target_type'] = 'executable'

o['variables']['node_experimental_http_parser'] = \
b(options.experimental_http_parser)

def configure_library(lib, output):
shared_lib = 'shared_' + lib
output['variables']['node_' + shared_lib] = b(getattr(options, shared_lib))
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2 changes: 1 addition & 1 deletion doc/api/cli.md
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Expand Up @@ -129,7 +129,7 @@ Chooses an HTTP parser library. Available values are:
- `llhttp` for https://llhttp.org/
- `legacy` for https://github.com/nodejs/http-parser

The default is `legacy`, unless otherwise specified when building Node.js.
The default is `llhttp`, unless otherwise specified when building Node.js.

This flag exists to aid in experimentation with the internal implementation of
the Node.js http parser.
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1 change: 0 additions & 1 deletion node.gyp
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Expand Up @@ -12,7 +12,6 @@
'force_dynamic_crt%': 0,
'node_module_version%': '',
'node_shared_zlib%': 'false',
'node_experimental_http_parser%': 'false',
'node_shared_http_parser%': 'false',
'node_shared_cares%': 'false',
'node_shared_libuv%': 'false',
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4 changes: 0 additions & 4 deletions node.gypi
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Expand Up @@ -163,10 +163,6 @@
],
}],

[ 'node_experimental_http_parser=="true"', {
'defines': [ 'NODE_EXPERIMENTAL_HTTP_DEFAULT' ],
} ],

[ 'node_shared_http_parser=="false"', {
'dependencies': [
'deps/http_parser/http_parser.gyp:http_parser',
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12 changes: 0 additions & 12 deletions src/inspector_socket.cc
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@@ -1,8 +1,6 @@
#include "inspector_socket.h"

#ifdef NODE_EXPERIMENTAL_HTTP_DEFAULT
#define NODE_EXPERIMENTAL_HTTP
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Where is this value NODE_EXPERIMENTAL_HTTP consumed?
If it's required, should we rename it as llhttp won't be experimental anymore after this commit is pushed?

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It’s consumed in http_parser_adaptor.h.

I agree that the original name was not a great choice, but I am not sure that it would be worth the churn of renaming – if you feel strongly about it, you can feel free to push a new commit to this PR or open a new one afterwards?

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Sure!

#endif
#include "http_parser_adaptor.h"

#include "util-inl.h"
Expand Down Expand Up @@ -437,13 +435,8 @@ class HttpHandler : public ProtocolHandler {
explicit HttpHandler(InspectorSocket* inspector, TcpHolder::Pointer tcp)
: ProtocolHandler(inspector, std::move(tcp)),
parsing_value_(false) {
#ifdef NODE_EXPERIMENTAL_HTTP_DEFAULT
llhttp_init(&parser_, HTTP_REQUEST, &parser_settings);
llhttp_settings_init(&parser_settings);
#else /* !NODE_EXPERIMENTAL_HTTP_DEFAULT */
http_parser_init(&parser_, HTTP_REQUEST);
http_parser_settings_init(&parser_settings);
#endif /* NODE_EXPERIMENTAL_HTTP_DEFAULT */
parser_settings.on_header_field = OnHeaderField;
parser_settings.on_header_value = OnHeaderValue;
parser_settings.on_message_complete = OnMessageComplete;
Expand Down Expand Up @@ -488,17 +481,12 @@ class HttpHandler : public ProtocolHandler {

void OnData(std::vector<char>* data) override {
parser_errno_t err;
#ifdef NODE_EXPERIMENTAL_HTTP_DEFAULT
err = llhttp_execute(&parser_, data->data(), data->size());

if (err == HPE_PAUSED_UPGRADE) {
err = HPE_OK;
llhttp_resume_after_upgrade(&parser_);
}
#else /* !NODE_EXPERIMENTAL_HTTP_DEFAULT */
http_parser_execute(&parser_, &parser_settings, data->data(), data->size());
err = HTTP_PARSER_ERRNO(&parser_);
#endif /* NODE_EXPERIMENTAL_HTTP_DEFAULT */
data->clear();
if (err != HPE_OK) {
CancelHandshake();
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4 changes: 0 additions & 4 deletions src/node_options.cc
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Expand Up @@ -109,11 +109,7 @@ EnvironmentOptionsParser::EnvironmentOptionsParser() {
AddOption("--expose-internals", "", &EnvironmentOptions::expose_internals);
AddOption("--http-parser",
"Select which HTTP parser to use; either 'legacy' or 'llhttp' "
#ifdef NODE_EXPERIMENTAL_HTTP_DEFAULT
"(default: llhttp).",
#else
"(default: legacy).",
#endif
&EnvironmentOptions::http_parser,
kAllowedInEnvironment);
AddOption("--loader",
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7 changes: 1 addition & 6 deletions src/node_options.h
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Expand Up @@ -72,12 +72,7 @@ class EnvironmentOptions : public Options {
bool experimental_vm_modules = false;
bool experimental_worker = false;
bool expose_internals = false;
std::string http_parser =
#ifdef NODE_EXPERIMENTAL_HTTP_DEFAULT
"llhttp";
#else
"legacy";
#endif
std::string http_parser = "llhttp";
bool no_deprecation = false;
bool no_force_async_hooks_checks = false;
bool no_warnings = false;
Expand Down