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tang/0001-Add-support-for-building-with-llhttp-instead-of-http.patch
Sergio Correia 6e1ba39c48
Use llhttp instead of http-parser
2024-01-11 17:18:15 +00:00

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From 6aebfd5499039b58b88eb15eba1aa719c117cfd4 Mon Sep 17 00:00:00 2001
From: Sergio Correia <scorreia@redhat.com>
Date: Tue, 9 Jan 2024 08:56:59 +0000
Subject: [PATCH] Add support for building with llhttp instead of http-parser
As http-parser has been unmaintained for a while [1], let's add
support for its natural replacement, llhttp.
However, as llhttp does not seem to be packaged in distros like
Debian [2], we will keep supporting building with http-parser for
time being, preferring llhttp, if it is present.
[1] https://github.com/nodejs/http-parser/issues/522
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977716
---
.github/workflows/install-dependencies | 2 +-
meson.build | 17 ++++++++++---
src/http.c | 10 ++++----
src/http.h | 35 +++++++++++++++++++++++---
src/tangd.c | 16 ++++++------
5 files changed, 58 insertions(+), 22 deletions(-)
diff --git a/.github/workflows/install-dependencies b/.github/workflows/install-dependencies
index 96852a8..a9bbab0 100755
--- a/.github/workflows/install-dependencies
+++ b/.github/workflows/install-dependencies
@@ -13,7 +13,7 @@ debian:*|ubuntu:*)
echo 'max_parallel_downloads=10' >> /etc/dnf/dnf.conf
dnf -y clean all
dnf -y --setopt=deltarpm=0 update
- dnf -y install gcc meson pkgconfig libjose-devel jose http-parser-devel \
+ dnf -y install gcc meson pkgconfig libjose-devel jose llhttp-devel \
systemd gcovr curl socat iproute
;;
diff --git a/meson.build b/meson.build
index fd46cef..33c8aff 100644
--- a/meson.build
+++ b/meson.build
@@ -55,13 +55,22 @@ add_project_arguments('-DVERSION="'+meson.project_version() + '"', language : 'c
jose = dependency('jose', version: '>=8')
a2x = find_program('a2x', required: false)
compiler = meson.get_compiler('c')
-if not compiler.has_header('http_parser.h',args : '-I/usr/local/include')
- error('http-parser devel files not found.')
+
+http_lib = []
+if compiler.has_header('llhttp.h', args: '-I/usr/local/include')
+ http_lib = 'llhttp'
+ add_project_arguments('-DUSE_LLHTTP', language: 'c')
+else
+ if not compiler.has_header('http_parser.h', args: '-I/usr/local/include')
+ error('neither llhttp nor http-parser devel files found.')
+ endif
+ http_lib = 'http_parser'
endif
+
if host_machine.system() == 'freebsd'
- http_parser = compiler.find_library('http_parser',dirs : '/usr/local/lib')
+ http_parser = compiler.find_library(http_lib, dirs : '/usr/local/lib')
else
- http_parser = compiler.find_library('http_parser')
+ http_parser = compiler.find_library(http_lib)
endif
licenses = ['COPYING']
diff --git a/src/http.c b/src/http.c
index e9af37b..17b613f 100644
--- a/src/http.c
+++ b/src/http.c
@@ -36,7 +36,7 @@ HTTP_METHOD_MAP(XX)
};
static int
-on_url(http_parser *parser, const char *at, size_t length)
+on_url(http_parser_t *parser, const char *at, size_t length)
{
struct http_state *state = parser->data;
@@ -51,7 +51,7 @@ on_url(http_parser *parser, const char *at, size_t length)
}
static int
-on_body(http_parser *parser, const char *at, size_t length)
+on_body(http_parser_t *parser, const char *at, size_t length)
{
struct http_state *state = parser->data;
@@ -66,7 +66,7 @@ on_body(http_parser *parser, const char *at, size_t length)
}
static int
-on_message_complete(http_parser *parser)
+on_message_complete(http_parser_t *parser)
{
struct http_state *state = parser->data;
const char *addr = NULL;
@@ -132,7 +132,7 @@ egress:
return 0;
}
-const http_parser_settings http_settings = {
+const http_settings_t http_settings = {
.on_url = on_url,
.on_body = on_body,
.on_message_complete = on_message_complete,
@@ -140,7 +140,7 @@ const http_parser_settings http_settings = {
int
http_reply(const char *file, int line,
- enum http_status code, const char *fmt, ...)
+ http_status_t code, const char *fmt, ...)
{
const char *msg = NULL;
va_list ap;
diff --git a/src/http.h b/src/http.h
index 8660a4f..2e35686 100644
--- a/src/http.h
+++ b/src/http.h
@@ -19,12 +19,39 @@
#pragma once
-#include <http_parser.h>
#include <sys/types.h>
#include <regex.h>
+#ifdef USE_LLHTTP
+#include <llhttp.h>
+
+typedef llhttp_method_t http_method_t;
+typedef llhttp_status_t http_status_t;
+typedef llhttp_settings_t http_settings_t;
+typedef llhttp_t http_parser_t;
+#define tang_http_parser_init(parser, settings) llhttp_init(parser, HTTP_REQUEST, settings)
+#define tang_http_parser_execute(parser, settings, req, rcvd) llhttp_execute(parser, req, rcvd)
+#define tang_http_parser_errno(parser) parser.error
+#define tang_http_errno_description(parser, errno) llhttp_get_error_reason(parser)
+
+#else
+/* Legacy http-parser. */
+#include <http_parser.h>
+
+typedef enum http_method http_method_t;
+typedef enum http_status http_status_t;
+typedef http_parser_settings http_settings_t;
+typedef struct http_parser http_parser_t;
+
+#define tang_http_parser_init(parser, settings) http_parser_init(parser, HTTP_REQUEST)
+#define tang_http_parser_execute(parser, settings, req, rcvd) http_parser_execute(parser, settings, req, rcvd)
+#define tang_http_parser_errno(parser) parser.http_errno
+#define tang_http_errno_description(parser, errno) http_errno_description(errno)
+
+#endif /* USE_LLHTTP */
+
struct http_dispatch {
- int (*func)(enum http_method method, const char *path,
+ int (*func)(http_method_t method, const char *path,
const char *body, regmatch_t matches[], void *misc);
uint64_t methods;
size_t nmatches;
@@ -43,11 +70,11 @@ struct http_state {
void *misc;
};
-extern const http_parser_settings http_settings;
+extern const http_settings_t http_settings;
int __attribute__ ((format(printf, 4, 5)))
http_reply(const char *file, int line,
- enum http_status code, const char *fmt, ...);
+ http_status_t code, const char *fmt, ...);
#define http_reply(code, ...) \
http_reply(__FILE__, __LINE__, code, __VA_ARGS__)
diff --git a/src/tangd.c b/src/tangd.c
index 1e3a6a3..7f197f6 100644
--- a/src/tangd.c
+++ b/src/tangd.c
@@ -64,7 +64,7 @@ str_cleanup(char **str)
}
static int
-adv(enum http_method method, const char *path, const char *body,
+adv(http_method_t method, const char *path, const char *body,
regmatch_t matches[], void *misc)
{
__attribute__((cleanup(str_cleanup))) char *adv = NULL;
@@ -101,7 +101,7 @@ adv(enum http_method method, const char *path, const char *body,
}
static int
-rec(enum http_method method, const char *path, const char *body,
+rec(http_method_t method, const char *path, const char *body,
regmatch_t matches[], void *misc)
{
__attribute__((cleanup(str_cleanup))) char *enc = NULL;
@@ -197,13 +197,14 @@ static int
process_request(const char *jwkdir, int in_fileno)
{
struct http_state state = { .dispatch = dispatch, .misc = (char*)jwkdir };
- struct http_parser parser = { .data = &state };
+ http_parser_t parser;
struct stat st = {};
char req[4096] = {};
size_t rcvd = 0;
int r = 0;
- http_parser_init(&parser, HTTP_REQUEST);
+ tang_http_parser_init(&parser, &http_settings);
+ parser.data = &state;
if (stat(jwkdir, &st) != 0) {
fprintf(stderr, "Error calling stat() on path: %s: %m\n", jwkdir);
@@ -224,17 +225,16 @@ process_request(const char *jwkdir, int in_fileno)
rcvd += r;
- r = http_parser_execute(&parser, &http_settings, req, rcvd);
- if (parser.http_errno != 0) {
+ r = tang_http_parser_execute(&parser, &http_settings, req, rcvd);
+ if (tang_http_parser_errno(parser) != 0) {
fprintf(stderr, "HTTP Parsing Error: %s\n",
- http_errno_description(parser.http_errno));
+ tang_http_errno_description(&parser, tang_http_parser_errno(parser)));
return EXIT_SUCCESS;
}
memmove(req, &req[r], rcvd - r);
rcvd -= r;
}
-
return EXIT_SUCCESS;
}
--
2.41.0
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