public
Last active

webserver using libuv

  • Download Gist
Makefile
Makefile
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
webserver: webserver.c libuv/uv.a http-parser/http_parser.o
gcc -I libuv/include \
-lrt -lm -lpthread -o \
webserver webserver.c \
libuv/uv.a http-parser/http_parser.o
 
libuv/uv.a:
$(MAKE) -C libuv
 
http-parser/http_parser.o:
$(MAKE) -C http-parser http_parser.o
 
clean:
rm libuv/uv.a
rm http-parser/http_parser.o
rm webserver
README
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
An hello-world webserver in C using libuv (https://github.com/joyent/libuv) and
http-parser (https://github.com/ry/http-parser) based on Ryan Dahl's tutorial
http://vimeo.com/24713213 and updated to make it work with the most recent
libuv API.
 
Build it
 
git clone https://github.com/ry/http-parser.git
git clone https://github.com/joyent/libuv
make
 
Run it
 
./webserver
curl http://127.0.0.1:8000/
 
Stress-test it
 
ab -n 5000 -c 500 http://127.0.0.1:8000/
 
Call for coders!
I have this insane idea of writing a lightweight c++ web framework on top of
libuv. But. I can't do it by myself.
Anyone crazy enough to join me? Drop me a tweet / email.
 
- Andrea
https://twitter.com/utaal
https://github.com/utaal
utaaal+spam@gmail.com
webserver.c
C
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "libuv/include/uv.h"
#include "http-parser/http_parser.h"
 
#define CHECK(r, msg) \
if (r) { \
uv_err_t err = uv_last_error(uv_loop); \
fprintf(stderr, "%s: %s\n", msg, uv_strerror(err)); \
exit(1); \
}
#define UVERR(err, msg) fprintf(stderr, "%s: %s\n", msg, uv_strerror(err))
#define LOG(msg) puts(msg);
#define LOGF(fmt, params...) printf(fmt "\n", params);
#define LOG_ERROR(msg) puts(msg);
 
#define RESPONSE \
"HTTP/1.1 200 OK\r\n" \
"Content-Type: text/plain\r\n" \
"Content-Length: 12\r\n" \
"\r\n" \
"hello world\n"
 
static uv_loop_t* uv_loop;
static uv_tcp_t server;
static http_parser_settings parser_settings;
 
static uv_buf_t resbuf;
 
typedef struct {
uv_tcp_t handle;
http_parser parser;
uv_write_t write_req;
int request_num;
} client_t;
 
void on_close(uv_handle_t* handle) {
client_t* client = (client_t*) handle->data;
 
LOGF("[ %5d ] connection closed", client->request_num);
 
free(client);
}
 
uv_buf_t on_alloc(uv_handle_t* client, size_t suggested_size) {
uv_buf_t buf;
buf.base = malloc(suggested_size);
buf.len = suggested_size;
return buf;
}
 
void on_read(uv_stream_t* tcp, ssize_t nread, uv_buf_t buf) {
size_t parsed;
 
client_t* client = (client_t*) tcp->data;
 
if (nread >= 0) {
parsed = http_parser_execute(
&client->parser, &parser_settings, buf.base, nread);
if (parsed < nread) {
LOG_ERROR("parse error");
uv_close((uv_handle_t*) &client->handle, on_close);
}
} else {
uv_err_t err = uv_last_error(uv_loop);
if (err.code != UV_EOF) {
UVERR(err, "read");
}
}
 
free(buf.base);
}
 
static int request_num = 1;
 
void on_connect(uv_stream_t* server_handle, int status) {
CHECK(status, "connect");
 
int r;
 
assert((uv_tcp_t*)server_handle == &server);
 
client_t* client = malloc(sizeof(client_t));
client->request_num = request_num;
 
LOGF("[ %5d ] new connection", request_num++);
 
uv_tcp_init(uv_loop, &client->handle);
http_parser_init(&client->parser, HTTP_REQUEST);
 
client->parser.data = client;
client->handle.data = client;
 
r = uv_accept(server_handle, (uv_stream_t*)&client->handle);
CHECK(r, "accept");
 
uv_read_start((uv_stream_t*)&client->handle, on_alloc, on_read);
}
 
void after_write(uv_write_t* req, int status) {
CHECK(status, "write");
 
uv_close((uv_handle_t*)req->handle, on_close);
}
 
int on_headers_complete(http_parser* parser) {
client_t* client = (client_t*) parser->data;
LOGF("[ %5d ] http message parsed", client->request_num);
 
uv_write(
&client->write_req,
(uv_stream_t*)&client->handle,
&resbuf,
1,
after_write);
 
return 1;
}
 
int main() {
int r;
 
parser_settings.on_headers_complete = on_headers_complete;
resbuf.base = RESPONSE;
resbuf.len = sizeof(RESPONSE);
 
uv_loop = uv_default_loop();
 
r = uv_tcp_init(uv_loop, &server);
CHECK(r, "bind");
 
struct sockaddr_in address = uv_ip4_addr("0.0.0.0", 8000);
 
r = uv_tcp_bind(&server, address);
CHECK(r, "bind");
uv_listen((uv_stream_t*)&server, 128, on_connect);
 
LOG("listening on port 8000");
 
uv_run(uv_loop);
}

btw, I'm keeping a template server up to date with latest libuv here: https://github.com/springmeyer/libuv-webserver

uv_run(uv_loop) need to add UV_RUN_DEFAULT as second parameter

Please sign in to comment on this gist.

Something went wrong with that request. Please try again.