#if 0
/*─────────────────────────────────────────────────────────────────╗
│ To the extent possible under law, Justine Tunney has waived │
│ all copyright and related or neighboring rights to this file, │
│ as it is written in the following disclaimers: │
│ • http://unlicense.org/ │
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "libc/assert.h"
#include "libc/bits/atomic.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/struct/sigset.h"
#include "libc/calls/struct/timespec.h"
#include "libc/calls/struct/timeval.h"
#include "libc/dce.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/wait0.internal.h"
#include "libc/limits.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.internal.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/runtime/sysconf.h"
#include "libc/sock/sock.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/af.h"
#include "libc/sysv/consts/clock.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/ipproto.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/poll.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/rlimit.h"
#include "libc/sysv/consts/sig.h"
#include "libc/sysv/consts/so.h"
#include "libc/sysv/consts/sock.h"
#include "libc/sysv/consts/sol.h"
#include "libc/sysv/consts/tcp.h"
#include "libc/thread/spawn.h"
#include "libc/time/struct/tm.h"
#include "libc/time/time.h"
#include "net/http/http.h"
#include "net/http/url.h"
/**
* @fileoverview greenbean lightweighht threaded web server
*
* $ make -j8 o//tool/net/greenbean.com
* $ o//tool/net/greenbean.com &
* $ printf 'GET /\n\n' | nc 127.0.0.1 8080
* HTTP/1.1 200 OK
* Server: greenbean/1.o
* Referrer-Policy: origin
* Cache-Control: private; max-age=0
* Content-Type: text/html; charset=utf-8
* Date: Sat, 14 May 2022 14:13:07 GMT
* Content-Length: 118
*
* <!doctype html>
* <title>hello world</title>
* <h1>hello world</h1>
* <p>this is a fun webpage
* <p>hosted by greenbean
*
* Like redbean, greenbean has superior performance too, with an
* advantage on benchmarks biased towards high connection counts
*
* $ wrk -c 300 -t 32 --latency http://127.0.0.1:8080/
* Running 10s test @ http://127.0.0.1:8080/
* 32 threads and 300 connections
* Thread Stats Avg Stdev Max +/- Stdev
* Latency 661.06us 5.11ms 96.22ms 98.85%
* Req/Sec 42.38k 8.90k 90.47k 84.65%
* Latency Distribution
* 50% 184.00us
* 75% 201.00us
* 90% 224.00us
* 99% 11.99ms
* 10221978 requests in 7.60s, 3.02GB read
* Requests/sec: 1345015.69
* Transfer/sec: 406.62MB
*
*/
#define PORT 8080
#define HEARTBEAT 100
#define KEEPALIVE 5000
#define LOGGING 0
#define STANDARD_RESPONSE_HEADERS \
"Server: greenbean/1.o\r\n" \
"Referrer-Policy: origin\r\n" \
"Cache-Control: private; max-age=0\r\n"
int threads;
_Atomic(int) workers;
_Atomic(int) messages;
_Atomic(int) listening;
_Atomic(int) connections;
_Atomic(int) closingtime;
const char *volatile status;
int Worker(void *id, int tid) {
int server, yes = 1;
// load balance incoming connections for port 8080 across all threads
// hangup on any browser clients that lag for more than a few seconds
struct timeval timeo = {KEEPALIVE / 1000, KEEPALIVE % 1000};
struct sockaddr_in addr = {.sin_family = AF_INET, .sin_port = htons(PORT)};
server = socket(AF_INET, SOCK_STREAM, 0);
if (server == -1) {
kprintf("socket() failed %m\n"
" try running: sudo prlimit --pid=$$ --nofile=%d\n",
threads * 2);
goto WorkerFinished;
}
setsockopt(server, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
setsockopt(server, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
setsockopt(server, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes));
setsockopt(server, SOL_TCP, TCP_FASTOPEN, &yes, sizeof(yes));
setsockopt(server, SOL_TCP, TCP_QUICKACK, &yes, sizeof(yes));
errno = 0;
if (bind(server, &addr, sizeof(addr)) == -1) {
kprintf("%s() failed %m\n", "socket");
goto CloseWorker;
}
listen(server, 1);
// connection loop
++listening;
while (!closingtime) {
struct tm tm;
int64_t unixts;
struct Url url;
ssize_t got, sent;
struct timespec ts;
struct HttpMessage msg;
uint32_t clientaddrsize;
struct sockaddr_in clientaddr;
char inbuf[1500], outbuf[512], *p, *q;
int clientip, client, inmsglen, outmsglen;
// this slows the server down a lot but is needed on non-Linux to
// react to keyboard ctrl-c
if (!IsLinux() &&
poll(&(struct pollfd){server, POLLIN}, 1, HEARTBEAT) < 1) {
continue;
}
// wait for client connection
clientaddrsize = sizeof(clientaddr);
client = accept(server, &clientaddr, &clientaddrsize);
// accept() can raise a very diverse number of errors but none of
// them are really true showstoppers that would necessitate us to
// panic and abort the entire server, so we can just ignore these
if (client == -1) {
// we used SO_RCVTIMEO and SO_SNDTIMEO because those settings are
// inherited by the accepted sockets, but using them also has the
// side-effect that the listening socket fails with EAGAIN, every
// several seconds. we can use that to our advantage to check for
// the ctrl-c shutdowne event; otherwise, we retry the accept call
continue;
}
++connections;
// message loop
do {
// parse the incoming http message
InitHttpMessage(&msg, kHttpRequest);
// we're not terrible concerned when errors happen here
if ((got = read(client, inbuf, sizeof(inbuf))) <= 0) break;
// check that client message wasn't fragmented into more reads
if (!(inmsglen = ParseHttpMessage(&msg, inbuf, got))) break;
++messages;
#if LOGGING
// log the incoming http message
clientip = ntohl(clientaddr.sin_addr.s_addr);
kprintf("%6P get some %d.%d.%d.%d:%d %#.*s\n",
(clientip & 0xff000000) >> 030, (clientip & 0x00ff0000) >> 020,
(clientip & 0x0000ff00) >> 010, (clientip & 0x000000ff) >> 000,
ntohs(clientaddr.sin_port), msg.uri.b - msg.uri.a,
inbuf + msg.uri.a);
#endif
// display hello world html page for http://127.0.0.1:8080/
if (msg.method == kHttpGet &&
(msg.uri.b - msg.uri.a == 1 && inbuf[msg.uri.a + 0] == '/')) {
q = "<!doctype html>\r\n"
"<title>hello world</title>\r\n"
"<h1>hello world</h1>\r\n"
"<p>this is a fun webpage\r\n"
"<p>hosted by greenbean\r\n";
p = stpcpy(outbuf, "HTTP/1.1 200 OK\r\n" STANDARD_RESPONSE_HEADERS
"Content-Type: text/html; charset=utf-8\r\n"
"Date: ");
clock_gettime(0, &ts), unixts = ts.tv_sec;
p = FormatHttpDateTime(p, gmtime_r(&unixts, &tm));
p = stpcpy(p, "\r\nContent-Length: ");
p = FormatInt32(p, strlen(q));
p = stpcpy(p, "\r\n\r\n");
p = stpcpy(p, q);
outmsglen = p - outbuf;
sent = write(client, outbuf, outmsglen);
} else {
// display 404 not found error page for every thing else
q = "<!doctype html>\r\n"
"<title>404 not found</title>\r\n"
"<h1>404 not found</h1>\r\n";
p = stpcpy(outbuf,
"HTTP/1.1 404 Not Found\r\n" STANDARD_RESPONSE_HEADERS
"Content-Type: text/html; charset=utf-8\r\n"
"Date: ");
clock_gettime(0, &ts), unixts = ts.tv_sec;
p = FormatHttpDateTime(p, gmtime_r(&unixts, &tm));
p = stpcpy(p, "\r\nContent-Length: ");
p = FormatInt32(p, strlen(q));
p = stpcpy(p, "\r\n\r\n");
p = stpcpy(p, q);
outmsglen = p - outbuf;
sent = write(client, outbuf, p - outbuf);
}
// if the client isn't pipelining and write() wrote the full
// amount, then since we sent the content length and checked
// that the client didn't attach a payload, we are so synced
// thus we can safely process more messages
} while (got == inmsglen && sent == outmsglen &&
!msg.headers[kHttpContentLength].a &&
!msg.headers[kHttpTransferEncoding].a &&
(msg.method == kHttpGet || msg.method == kHttpHead));
DestroyHttpMessage(&msg);
close(client);
--connections;
}
--listening;
// inform the parent that this clone has finished
CloseWorker:
close(server);
WorkerFinished:
--workers;
return 0;
}
void OnCtrlC(int sig) {
closingtime = true;
status = " shutting down...";
}
void PrintStatus(void) {
kprintf("\r\e[K\e[32mgreenbean\e[0m "
"workers=%d "
"listening=%d "
"connections=%d "
"messages=%d%s ",
workers, listening, connections, messages, status);
}
int main(int argc, char *argv[]) {
int i;
struct spawn *th;
uint32_t *hostips;
// ShowCrashReports();
// listen for ctrl-c, hangup, and kill which shut down greenbean
status = "";
struct sigaction sa = {.sa_handler = OnCtrlC};
sigaction(SIGHUP, &sa, 0);
sigaction(SIGINT, &sa, 0);
sigaction(SIGTERM, &sa, 0);
// print all the ips that 0.0.0.0 will bind
for (hostips = GetHostIps(), i = 0; hostips[i]; ++i) {
kprintf("listening on http://%d.%d.%d.%d:%d\n",
(hostips[i] & 0xff000000) >> 030, (hostips[i] & 0x00ff0000) >> 020,
(hostips[i] & 0x0000ff00) >> 010, (hostips[i] & 0x000000ff) >> 000,
PORT);
}
threads = argc > 1 ? atoi(argv[1]) : GetCpuCount();
if (!(1 <= threads && threads <= 100000)) {
kprintf("error: invalid number of threads\n");
exit(1);
}
// spawn over 9,000 worker threads
th = calloc(threads, sizeof(*th));
for (i = 0; i < threads; ++i) {
++workers;
if (_spawn(Worker, (void *)(intptr_t)i, th + i) == -1) {
--workers;
kprintf("error: _spawn(%d) failed %m\n", i);
}
if (!(i % 500)) {
PrintStatus();
}
}
// wait for workers to terminate
while (workers) {
PrintStatus();
usleep(HEARTBEAT * 1000);
}
// clean up terminal line
kprintf("\r\e[K");
// join the workers
for (i = 0; i < threads; ++i) {
_join(th + i);
}
// clean up memory
free(hostips);
free(th);
}