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nghttp2/examples/tiny-nghttpd.c

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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2014 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* This program is intended to measure library performance, avoiding
* overhead of underlying I/O library (e.g., libevent, Boost ASIO).
*/
#define _GNU_SOURCE
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* !HAVE_CONFIG_H */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
#include <signal.h>
#include <sys/epoll.h>
#include <sys/timerfd.h>
#include <nghttp2/nghttp2.h>
#define SERVER_NAME "tiny-nghttpd nghttp2/" NGHTTP2_VERSION
#define MAKE_NV(name, value) \
{ \
(uint8_t *)(name), (uint8_t *)(value), sizeof((name)) - 1, \
sizeof((value)) - 1, NGHTTP2_NV_FLAG_NONE \
}
#define MAKE_NV2(name, value, valuelen) \
{ \
(uint8_t *)(name), (uint8_t *)(value), sizeof((name)) - 1, (valuelen), \
NGHTTP2_NV_FLAG_NONE \
}
#define array_size(a) (sizeof((a)) / sizeof((a)[0]))
/* Returns the length of remaning data in buffer */
#define io_buf_len(iobuf) ((iobuf)->last - (iobuf)->pos)
/* Returns the space buffer can still accept */
#define io_buf_left(iobuf) ((iobuf)->end - (iobuf)->last)
typedef struct {
/* beginning of buffer */
uint8_t *begin;
/* one byte beyond the end of buffer */
uint8_t *end;
/* next read/write position of buffer */
uint8_t *pos;
/* one byte beyond last data of buffer */
uint8_t *last;
} io_buf;
typedef struct {
/* epoll fd */
int epfd;
} io_loop;
typedef struct stream {
struct stream *prev, *next;
/* mandatory header fields */
char *method;
char *scheme;
char *authority;
char *path;
char *host;
/* region of response body in rawscrbuf */
uint8_t *res_begin, *res_end;
/* io_buf wrapping rawscrbuf */
io_buf scrbuf;
int64_t fileleft;
/* length of mandatory header fields */
size_t methodlen;
size_t schemelen;
size_t authoritylen;
size_t pathlen;
size_t hostlen;
/* stream ID of this stream */
int32_t stream_id;
/* fd for reading file */
int filefd;
/* scratch buffer for this stream */
uint8_t rawscrbuf[4096];
} stream;
typedef struct { int (*handler)(io_loop *, uint32_t, void *); } evhandle;
typedef struct {
evhandle evhn;
nghttp2_session *session;
/* list of stream */
stream strm_head;
/* pending library output */
const uint8_t *cache;
/* io_buf wrapping rawoutbuf */
io_buf buf;
/* length of cache */
size_t cachelen;
/* client fd */
int fd;
/* output buffer */
uint8_t rawoutbuf[65536];
} connection;
typedef struct {
evhandle evhn;
/* listening fd */
int fd;
} server;
typedef struct {
evhandle evhn;
/* timerfd */
int fd;
} timer;
/* document root */
const char *docroot;
/* length of docroot */
size_t docrootlen;
nghttp2_session_callbacks *shared_callbacks;
nghttp2_option *shared_option;
static int handle_accept(io_loop *loop, uint32_t events, void *ptr);
static int handle_connection(io_loop *loop, uint32_t events, void *ptr);
static int handle_timer(io_loop *loop, uint32_t events, void *ptr);
static void io_buf_init(io_buf *buf, uint8_t *underlying, size_t len) {
buf->begin = buf->pos = buf->last = underlying;
buf->end = underlying + len;
}
static void io_buf_add(io_buf *buf, const void *src, size_t len) {
memcpy(buf->last, src, len);
buf->last += len;
}
static char *io_buf_add_str(io_buf *buf, const void *src, size_t len) {
uint8_t *start = buf->last;
memcpy(buf->last, src, len);
buf->last += len;
*buf->last++ = '\0';
return (char *)start;
}
static int memeq(const void *a, const void *b, size_t n) {
return memcmp(a, b, n) == 0;
}
#define streq(A, B, N) ((sizeof((A)) - 1) == (N) && memeq((A), (B), (N)))
typedef enum {
NGHTTP2_TOKEN__AUTHORITY,
NGHTTP2_TOKEN__METHOD,
NGHTTP2_TOKEN__PATH,
NGHTTP2_TOKEN__SCHEME,
NGHTTP2_TOKEN_HOST,
} nghttp2_token;
/* Inspired by h2o header lookup. https://github.com/h2o/h2o */
static int lookup_token(const uint8_t *name, size_t namelen) {
switch (namelen) {
case 5:
switch (name[namelen - 1]) {
case 'h':
if (streq(":pat", name, 4)) {
return NGHTTP2_TOKEN__PATH;
}
break;
}
break;
case 7:
switch (name[namelen - 1]) {
case 'd':
if (streq(":metho", name, 6)) {
return NGHTTP2_TOKEN__METHOD;
}
break;
case 'e':
if (streq(":schem", name, 6)) {
return NGHTTP2_TOKEN__SCHEME;
}
break;
}
break;
case 10:
switch (name[namelen - 1]) {
case 'y':
if (streq(":authorit", name, 9)) {
return NGHTTP2_TOKEN__AUTHORITY;
}
break;
}
break;
}
return -1;
}
static char *cpydig(char *buf, int n, size_t len) {
char *p;
p = buf + len - 1;
do {
*p-- = (n % 10) + '0';
n /= 10;
} while (p >= buf);
return buf + len;
}
static const char *MONTH[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
static const char *DAY_OF_WEEK[] = {"Sun", "Mon", "Tue", "Wed",
"Thu", "Fri", "Sat"};
static size_t http_date(char *buf, time_t t) {
struct tm tms;
char *p = buf;
if (gmtime_r(&t, &tms) == NULL) {
return 0;
}
/* Sat, 27 Sep 2014 06:31:15 GMT */
memcpy(p, DAY_OF_WEEK[tms.tm_wday], 3);
p += 3;
*p++ = ',';
*p++ = ' ';
p = cpydig(p, tms.tm_mday, 2);
*p++ = ' ';
memcpy(p, MONTH[tms.tm_mon], 3);
p += 3;
*p++ = ' ';
p = cpydig(p, tms.tm_year + 1900, 4);
*p++ = ' ';
p = cpydig(p, tms.tm_hour, 2);
*p++ = ':';
p = cpydig(p, tms.tm_min, 2);
*p++ = ':';
p = cpydig(p, tms.tm_sec, 2);
memcpy(p, " GMT", 4);
p += 4;
return p - buf;
}
static char date[29];
static char datelen;
static void update_date() { datelen = http_date(date, time(NULL)); }
static size_t utos(char *buf, size_t len, uint64_t n) {
size_t nwrite = 0;
uint64_t t = n;
if (len == 0) {
return 0;
}
if (n == 0) {
buf[0] = '0';
return 1;
}
for (; t; t /= 10, ++nwrite)
;
if (nwrite > len) {
return 0;
}
buf += nwrite - 1;
do {
*buf-- = (n % 10) + '0';
n /= 10;
} while (n);
return nwrite;
}
static void print_errno(const char *prefix, int errnum) {
char buf[1024];
char *errmsg;
errmsg = strerror_r(errnum, buf, sizeof(buf));
fprintf(stderr, "%s: %s\n", prefix, errmsg);
}
#define list_insert(head, elem) \
do { \
(elem)->prev = (head); \
(elem)->next = (head)->next; \
\
if ((head)->next) { \
(head)->next->prev = (elem); \
} \
(head)->next = (elem); \
} while (0)
#define list_remove(elem) \
do { \
(elem)->prev->next = (elem)->next; \
if ((elem)->next) { \
(elem)->next->prev = (elem)->prev; \
} \
} while (0)
static stream *stream_new(int32_t stream_id, connection *conn) {
stream *strm;
strm = malloc(sizeof(stream));
strm->prev = strm->next = NULL;
strm->method = NULL;
strm->scheme = NULL;
strm->authority = NULL;
strm->path = NULL;
strm->host = NULL;
strm->res_begin = NULL;
strm->res_end = NULL;
strm->methodlen = 0;
strm->schemelen = 0;
strm->authoritylen = 0;
strm->pathlen = 0;
strm->hostlen = 0;
strm->stream_id = stream_id;
strm->filefd = -1;
strm->fileleft = 0;
list_insert(&conn->strm_head, strm);
io_buf_init(&strm->scrbuf, strm->rawscrbuf, sizeof(strm->rawscrbuf));
return strm;
}
static void stream_del(stream *strm) {
list_remove(strm);
if (strm->filefd != -1) {
close(strm->filefd);
}
free(strm);
}
static connection *connection_new(int fd) {
connection *conn;
int rv;
conn = malloc(sizeof(connection));
rv = nghttp2_session_server_new2(&conn->session, shared_callbacks, conn,
shared_option);
if (rv != 0) {
goto cleanup;
}
conn->fd = fd;
conn->cache = NULL;
conn->cachelen = 0;
io_buf_init(&conn->buf, conn->rawoutbuf, sizeof(conn->rawoutbuf));
conn->evhn.handler = handle_connection;
conn->strm_head.next = NULL;
return conn;
cleanup:
free(conn);
return NULL;
}
static void connection_del(connection *conn) {
stream *strm;
nghttp2_session_del(conn->session);
shutdown(conn->fd, SHUT_WR);
close(conn->fd);
strm = conn->strm_head.next;
while (strm) {
stream *next_strm = strm->next;
stream_del(strm);
strm = next_strm;
}
free(conn);
}
static int connection_start(connection *conn) {
nghttp2_settings_entry iv = {NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100};
int rv;
rv = nghttp2_submit_settings(conn->session, NGHTTP2_FLAG_NONE, &iv, 1);
if (rv != 0) {
return -1;
}
return 0;
}
static int server_init(server *serv, const char *node, const char *service) {
int rv;
struct addrinfo hints;
struct addrinfo *res, *rp;
int fd;
int on = 1;
socklen_t optlen = sizeof(on);
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
rv = getaddrinfo(node, service, &hints, &res);
if (rv != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return -1;
}
for (rp = res; rp; rp = rp->ai_next) {
fd =
socket(rp->ai_family, rp->ai_socktype | SOCK_NONBLOCK, rp->ai_protocol);
if (fd == -1) {
continue;
}
rv = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, optlen);
if (rv == -1) {
print_errno("setsockopt", errno);
}
if (bind(fd, rp->ai_addr, rp->ai_addrlen) != 0) {
close(fd);
continue;
}
if (listen(fd, 65536) != 0) {
close(fd);
continue;
}
break;
}
freeaddrinfo(res);
if (!rp) {
fprintf(stderr, "No address to bind\n");
return -1;
}
serv->fd = fd;
serv->evhn.handler = handle_accept;
return 0;
}
static int timer_init(timer *tmr) {
int fd;
struct itimerspec timerval = {{1, 0}, {1, 0}};
fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
if (fd == -1) {
print_errno("timerfd_create", errno);
return -1;
}
if (timerfd_settime(fd, 0, &timerval, NULL) != 0) {
print_errno("timerfd_settime", errno);
return -1;
}
tmr->fd = fd;
tmr->evhn.handler = handle_timer;
return 0;
}
static int io_loop_init(io_loop *loop) {
int epfd;
epfd = epoll_create1(0);
if (epfd == -1) {
print_errno("epoll_create", errno);
return -1;
}
loop->epfd = epfd;
return 0;
}
static int io_loop_ctl(io_loop *loop, int op, int fd, uint32_t events,
void *ptr) {
int rv;
struct epoll_event ev;
ev.events = events;
ev.data.ptr = ptr;
rv = epoll_ctl(loop->epfd, op, fd, &ev);
if (rv != 0) {
print_errno("epoll_ctl", errno);
return -1;
}
return 0;
}
static int io_loop_add(io_loop *loop, int fd, uint32_t events, void *ptr) {
return io_loop_ctl(loop, EPOLL_CTL_ADD, fd, events, ptr);
}
static int io_loop_mod(io_loop *loop, int fd, uint32_t events, void *ptr) {
return io_loop_ctl(loop, EPOLL_CTL_MOD, fd, events, ptr);
}
static int io_loop_run(io_loop *loop, server *serv _U_) {
#define NUM_EVENTS 1024
struct epoll_event events[NUM_EVENTS];
for (;;) {
int nev;
evhandle *evhn;
struct epoll_event *ev, *end;
while ((nev = epoll_wait(loop->epfd, events, NUM_EVENTS, -1)) == -1 &&
errno == EINTR)
;
if (nev == -1) {
print_errno("epoll_wait", errno);
return -1;
}
for (ev = events, end = events + nev; ev != end; ++ev) {
evhn = ev->data.ptr;
evhn->handler(loop, ev->events, ev->data.ptr);
}
}
}
static int handle_timer(io_loop *loop _U_, uint32_t events _U_, void *ptr) {
timer *tmr = ptr;
int64_t buf;
ssize_t nread;
while ((nread = read(tmr->fd, &buf, sizeof(buf))) == -1 && errno == EINTR)
;
assert(nread == sizeof(buf));
update_date();
return 0;
}
static int handle_accept(io_loop *loop, uint32_t events _U_, void *ptr) {
int acfd;
server *serv = ptr;
int on = 1;
socklen_t optlen = sizeof(on);
int rv;
for (;;) {
connection *conn;
while ((acfd = accept4(serv->fd, NULL, NULL, SOCK_NONBLOCK)) == -1 &&
errno == EINTR)
;
if (acfd == -1) {
switch (errno) {
case ENETDOWN:
case EPROTO:
case ENOPROTOOPT:
case EHOSTDOWN:
case ENONET:
case EHOSTUNREACH:
case EOPNOTSUPP:
case ENETUNREACH:
continue;
}
return 0;
}
rv = setsockopt(acfd, IPPROTO_TCP, TCP_NODELAY, &on, optlen);
if (rv == -1) {
print_errno("setsockopt", errno);
}
conn = connection_new(acfd);
if (conn == NULL) {
close(acfd);
continue;
}
if (connection_start(conn) != 0 ||
io_loop_add(loop, acfd, EPOLLIN | EPOLLOUT, conn) != 0) {
connection_del(conn);
}
}
}
static void stream_error(connection *conn, int32_t stream_id,
uint32_t error_code) {
nghttp2_submit_rst_stream(conn->session, NGHTTP2_FLAG_NONE, stream_id,
error_code);
}
static int send_data_callback(nghttp2_session *session _U_,
nghttp2_frame *frame, const uint8_t *framehd,
size_t length, nghttp2_data_source *source _U_,
void *user_data) {
connection *conn = user_data;
uint8_t *p = conn->buf.last;
stream *strm;
strm = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
if (!strm) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
/* We never use padding in this program */
assert(frame->data.padlen == 0);
if ((size_t)io_buf_left(&conn->buf) < 9 + frame->hd.length) {
return NGHTTP2_ERR_WOULDBLOCK;
}
memcpy(p, framehd, 9);
p += 9;
while (length) {
ssize_t nread;
while ((nread = read(strm->filefd, p, length)) == -1 && errno == EINTR)
;
if (nread == -1) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
length -= nread;
p += nread;
}
conn->buf.last = p;
return 0;
}
static ssize_t fd_read_callback(nghttp2_session *session _U_,
int32_t stream_id _U_, uint8_t *buf _U_,
size_t length, uint32_t *data_flags,
nghttp2_data_source *source,
void *user_data _U_) {
stream *strm = source->ptr;
ssize_t nread = (int64_t)length < strm->fileleft ? length : strm->fileleft;
*data_flags |= NGHTTP2_DATA_FLAG_NO_COPY;
strm->fileleft -= nread;
if (nread == 0 || strm->fileleft == 0) {
if (strm->fileleft != 0) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
*data_flags |= NGHTTP2_DATA_FLAG_EOF;
}
return nread;
}
static ssize_t resbuf_read_callback(nghttp2_session *session _U_,
int32_t stream_id _U_, uint8_t *buf,
size_t length, uint32_t *data_flags,
nghttp2_data_source *source,
void *user_data _U_) {
stream *strm = source->ptr;
size_t left = strm->res_end - strm->res_begin;
size_t nwrite = length < left ? length : left;
memcpy(buf, strm->res_begin, nwrite);
strm->res_begin += nwrite;
if (strm->res_begin == strm->res_end) {
*data_flags |= NGHTTP2_DATA_FLAG_EOF;
}
return nwrite;
}
static int hex_digit(char c) {
return ('0' <= c && c <= '9') || ('A' <= c && c <= 'F') ||
('a' <= c && c <= 'f');
}
static unsigned int hex_to_uint(char c) {
if (c <= '9') {
return c - '0';
}
if (c <= 'F') {
return c - 'A' + 10;
}
return c - 'a' + 10;
}
static void percent_decode(io_buf *buf, const char *s) {
for (; *s; ++s) {
if (*s == '?' || *s == '#') {
break;
}
if (*s == '%' && hex_digit(*(s + 1)) && hex_digit(*(s + 2))) {
*buf->last++ = (hex_to_uint(*(s + 1)) << 4) + hex_to_uint(*(s + 2));
s += 2;
continue;
}
*buf->last++ = *s;
}
}
static int check_path(const char *path, size_t len) {
return path[0] == '/' && strchr(path, '\\') == NULL &&
strstr(path, "/../") == NULL && strstr(path, "/./") == NULL &&
(len < 3 || memcmp(path + len - 3, "/..", 3) != 0) &&
(len < 2 || memcmp(path + len - 2, "/.", 2) != 0);
}
static int make_path(io_buf *pathbuf, const char *req, size_t reqlen _U_) {
uint8_t *p;
if (req[0] != '/') {
return -1;
}
if (docrootlen + strlen(req) + sizeof("index.html") >
(size_t)io_buf_left(pathbuf)) {
return -1;
}
io_buf_add(pathbuf, docroot, docrootlen);
p = pathbuf->last;
percent_decode(pathbuf, req);
if (*(pathbuf->last - 1) == '/') {
io_buf_add(pathbuf, "index.html", sizeof("index.html") - 1);
}
*pathbuf->last++ = '\0';
if (!check_path((const char *)p, pathbuf->last - 1 - p)) {
return -1;
}
return 0;
}
static int status_response(stream *strm, connection *conn,
const char *status_code) {
int rv;
size_t status_codelen = strlen(status_code);
char contentlength[19];
size_t contentlengthlen;
size_t reslen;
nghttp2_data_provider prd, *prdptr;
nghttp2_nv nva[5] = {
MAKE_NV(":status", ""), MAKE_NV("server", SERVER_NAME),
MAKE_NV2("date", date, datelen), MAKE_NV("content-length", ""),
};
size_t nvlen = 3;
nva[0].value = (uint8_t *)status_code;
nva[0].valuelen = strlen(status_code);
#define BODY1 "<html><head><title>"
#define BODY2 "</title></head><body><h1>"
#define BODY3 "</h1></body></html>"
reslen = sizeof(BODY1) - 1 + sizeof(BODY2) - 1 + sizeof(BODY3) - 1 +
status_codelen * 2;
if ((size_t)io_buf_left(&strm->scrbuf) < reslen) {
contentlength[0] = '0';
contentlengthlen = 1;
prdptr = NULL;
} else {
contentlengthlen = utos(contentlength, sizeof(contentlength), reslen);
strm->res_begin = strm->scrbuf.last;
io_buf_add(&strm->scrbuf, BODY1, sizeof(BODY1) - 1);
io_buf_add(&strm->scrbuf, status_code, strlen(status_code));
io_buf_add(&strm->scrbuf, BODY2, sizeof(BODY2) - 1);
io_buf_add(&strm->scrbuf, status_code, strlen(status_code));
io_buf_add(&strm->scrbuf, BODY3, sizeof(BODY3) - 1);
strm->res_end = strm->scrbuf.last;
prdptr = &prd;
}
nva[nvlen].value = (uint8_t *)contentlength;
nva[nvlen].valuelen = contentlengthlen;
++nvlen;
prd.source.ptr = strm;
prd.read_callback = resbuf_read_callback;
rv = nghttp2_submit_response(conn->session, strm->stream_id, nva, nvlen,
prdptr);
if (rv != 0) {
return -1;
}
return 0;
}
static int redirect_response(stream *strm, connection *conn) {
int rv;
size_t locationlen;
nghttp2_nv nva[5] = {
MAKE_NV(":status", "301"), MAKE_NV("server", SERVER_NAME),
MAKE_NV2("date", date, datelen), MAKE_NV("content-length", "0"),
MAKE_NV("location", ""),
};
/* + 1 for trailing '/' */
locationlen = strm->schemelen + 3 + strm->hostlen + strm->pathlen + 1;
if ((size_t)io_buf_left(&strm->scrbuf) < locationlen) {
return -1;
}
nva[4].value = strm->scrbuf.last;
nva[4].valuelen = locationlen;
io_buf_add(&strm->scrbuf, strm->scheme, strm->schemelen);
io_buf_add(&strm->scrbuf, "://", 3);
io_buf_add(&strm->scrbuf, strm->host, strm->hostlen);
io_buf_add(&strm->scrbuf, strm->path, strm->pathlen);
*strm->scrbuf.last++ = '/';
rv = nghttp2_submit_response(conn->session, strm->stream_id, nva,
array_size(nva), NULL);
if (rv != 0) {
return -1;
}
return 0;
}
static int process_request(stream *strm, connection *conn) {
int fd;
struct stat stbuf;
int rv;
nghttp2_data_provider prd;
char lastmod[32];
size_t lastmodlen;
char contentlength[19];
size_t contentlengthlen;
char path[1024];
io_buf pathbuf;
nghttp2_nv nva[5] = {
MAKE_NV(":status", "200"), MAKE_NV("server", SERVER_NAME),
MAKE_NV2("date", date, datelen), MAKE_NV("content-length", ""),
};
size_t nvlen = 3;
io_buf_init(&pathbuf, (uint8_t *)path, sizeof(path));
rv = make_path(&pathbuf, strm->path, strm->pathlen);
if (rv != 0) {
return status_response(strm, conn, "400");
}
fd = open(path, O_RDONLY);
if (fd == -1) {
return status_response(strm, conn, "404");
}
strm->filefd = fd;
rv = fstat(fd, &stbuf);
if (rv == -1) {
return status_response(strm, conn, "404");
}
if (stbuf.st_mode & S_IFDIR) {
return redirect_response(strm, conn);
}
prd.source.ptr = strm;
prd.read_callback = fd_read_callback;
strm->fileleft = stbuf.st_size;
lastmodlen = http_date(lastmod, stbuf.st_mtim.tv_sec);
contentlengthlen = utos(contentlength, sizeof(contentlength), stbuf.st_size);
nva[nvlen].value = (uint8_t *)contentlength;
nva[nvlen].valuelen = contentlengthlen;
++nvlen;
if (lastmodlen) {
nva[nvlen].name = (uint8_t *)"last-modified";
nva[nvlen].namelen = sizeof("last-modified") - 1;
nva[nvlen].value = (uint8_t *)lastmod;
nva[nvlen].valuelen = lastmodlen;
nva[nvlen].flags = NGHTTP2_NV_FLAG_NONE;
++nvlen;
}
rv =
nghttp2_submit_response(conn->session, strm->stream_id, nva, nvlen, &prd);
if (rv != 0) {
return -1;
}
return 0;
}
static int on_begin_headers_callback(nghttp2_session *session,
const nghttp2_frame *frame,
void *user_data) {
connection *conn = user_data;
stream *strm;
if (frame->hd.type != NGHTTP2_HEADERS ||
frame->headers.cat != NGHTTP2_HCAT_REQUEST) {
return 0;
}
strm = stream_new(frame->hd.stream_id, conn);
if (!strm) {
nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE, frame->hd.stream_id,
NGHTTP2_INTERNAL_ERROR);
return 0;
}
nghttp2_session_set_stream_user_data(session, frame->hd.stream_id, strm);
return 0;
}
static int on_header_callback(nghttp2_session *session,
const nghttp2_frame *frame, const uint8_t *name,
size_t namelen, const uint8_t *value,
size_t valuelen, uint8_t flags _U_,
void *user_data _U_) {
stream *strm;
if (frame->hd.type != NGHTTP2_HEADERS ||
frame->headers.cat != NGHTTP2_HCAT_REQUEST) {
return 0;
}
strm = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
if (!strm) {
return 0;
}
switch (lookup_token(name, namelen)) {
case NGHTTP2_TOKEN__METHOD:
strm->method = io_buf_add_str(&strm->scrbuf, value, valuelen);
if (!strm->method) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
strm->methodlen = valuelen;
break;
case NGHTTP2_TOKEN__SCHEME:
strm->scheme = io_buf_add_str(&strm->scrbuf, value, valuelen);
if (!strm->scheme) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
strm->schemelen = valuelen;
break;
case NGHTTP2_TOKEN__AUTHORITY:
strm->authority = io_buf_add_str(&strm->scrbuf, value, valuelen);
if (!strm->authority) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
strm->authoritylen = valuelen;
break;
case NGHTTP2_TOKEN__PATH:
strm->path = io_buf_add_str(&strm->scrbuf, value, valuelen);
if (!strm->path) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
strm->pathlen = valuelen;
break;
case NGHTTP2_TOKEN_HOST:
strm->host = io_buf_add_str(&strm->scrbuf, value, valuelen);
if (!strm->host) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
strm->hostlen = valuelen;
break;
}
return 0;
}
static int on_frame_recv_callback(nghttp2_session *session,
const nghttp2_frame *frame, void *user_data) {
connection *conn = user_data;
stream *strm;
if (frame->hd.type != NGHTTP2_HEADERS ||
frame->headers.cat != NGHTTP2_HCAT_REQUEST) {
return 0;
}
strm = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
if (!strm) {
return 0;
}
if (!strm->host) {
strm->host = strm->authority;
strm->hostlen = strm->authoritylen;
}
if (process_request(strm, conn) != 0) {
stream_error(conn, strm->stream_id, NGHTTP2_INTERNAL_ERROR);
return 0;
}
return 0;
}
static int on_stream_close_callback(nghttp2_session *session, int32_t stream_id,
uint32_t error_code _U_,
void *user_data _U_) {
stream *strm;
strm = nghttp2_session_get_stream_user_data(session, stream_id);
if (!strm) {
return 0;
}
stream_del(strm);
return 0;
}
static int on_frame_not_send_callback(nghttp2_session *session _U_,
const nghttp2_frame *frame,
int lib_error_code _U_, void *user_data) {
connection *conn = user_data;
if (frame->hd.type != NGHTTP2_HEADERS) {
return 0;
}
/* Issue RST_STREAM so that stream does not hang around. */
nghttp2_submit_rst_stream(conn->session, NGHTTP2_FLAG_NONE,
frame->hd.stream_id, NGHTTP2_INTERNAL_ERROR);
return 0;
}
static int do_read(connection *conn) {
uint8_t buf[32768];
for (;;) {
ssize_t nread;
ssize_t nproc;
while ((nread = read(conn->fd, buf, sizeof(buf))) == -1 && errno == EINTR)
;
if (nread == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
return 0;
}
return -1;
}
if (nread == 0) {
return -1;
}
nproc = nghttp2_session_mem_recv(conn->session, buf, nread);
if (nproc < 0) {
return -1;
}
}
}
static int do_write(connection *conn) {
for (;;) {
if (io_buf_len(&conn->buf)) {
ssize_t nwrite;
while ((nwrite = write(conn->fd, conn->buf.pos,
io_buf_len(&conn->buf))) == -1 &&
errno == EINTR)
;
if (nwrite == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
return 0;
}
return -1;
}
conn->buf.pos += nwrite;
if (io_buf_len(&conn->buf)) {
return 0;
}
io_buf_init(&conn->buf, conn->rawoutbuf, sizeof(conn->rawoutbuf));
}
if (conn->cache) {
io_buf_add(&conn->buf, conn->cache, conn->cachelen);
conn->cache = NULL;
conn->cachelen = 0;
}
for (;;) {
ssize_t n;
const uint8_t *b;
n = nghttp2_session_mem_send(conn->session, &b);
if (n < 0) {
return -1;
}
if (n == 0) {
if (io_buf_len(&conn->buf) == 0) {
return 0;
}
break;
}
if (io_buf_left(&conn->buf) < n) {
conn->cache = b;
conn->cachelen = n;
break;
}
io_buf_add(&conn->buf, b, n);
}
}
}
static int handle_connection(io_loop *loop, uint32_t events, void *ptr) {
connection *conn = ptr;
int rv;
uint32_t nextev = 0;
if (events & (EPOLLHUP | EPOLLERR)) {
goto cleanup;
}
if (events & EPOLLIN) {
rv = do_read(conn);
if (rv != 0) {
goto cleanup;
}
}
rv = do_write(conn);
if (rv != 0) {
goto cleanup;
}
if (nghttp2_session_want_read(conn->session)) {
nextev |= EPOLLIN;
}
if (io_buf_len(&conn->buf) || nghttp2_session_want_write(conn->session)) {
nextev |= EPOLLOUT;
}
if (!nextev) {
goto cleanup;
}
io_loop_mod(loop, conn->fd, nextev, conn);
return 0;
cleanup:
connection_del(conn);
return 0;
}
int main(int argc, char **argv) {
int rv;
server serv;
timer tmr;
io_loop loop;
struct sigaction act;
const char *address;
const char *service;
if (argc < 4) {
fprintf(stderr, "Usage: tiny-nghttpd <address> <port> <doc-root>\n");
exit(EXIT_FAILURE);
}
address = argv[1];
service = argv[2];
docroot = argv[3];
docrootlen = strlen(docroot);
memset(&act, 0, sizeof(act));
act.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &act, NULL);
rv = server_init(&serv, address, service);
if (rv != 0) {
exit(EXIT_FAILURE);
}
rv = timer_init(&tmr);
if (rv != 0) {
exit(EXIT_FAILURE);
}
rv = io_loop_init(&loop);
if (rv != 0) {
exit(EXIT_FAILURE);
}
rv = nghttp2_session_callbacks_new(&shared_callbacks);
if (rv != 0) {
fprintf(stderr, "nghttp2_session_callbacks_new: %s", nghttp2_strerror(rv));
exit(EXIT_FAILURE);
}
nghttp2_session_callbacks_set_on_begin_headers_callback(
shared_callbacks, on_begin_headers_callback);
nghttp2_session_callbacks_set_on_header_callback(shared_callbacks,
on_header_callback);
nghttp2_session_callbacks_set_on_frame_recv_callback(shared_callbacks,
on_frame_recv_callback);
nghttp2_session_callbacks_set_on_stream_close_callback(
shared_callbacks, on_stream_close_callback);
nghttp2_session_callbacks_set_on_frame_not_send_callback(
shared_callbacks, on_frame_not_send_callback);
nghttp2_session_callbacks_set_send_data_callback(shared_callbacks,
send_data_callback);
rv = nghttp2_option_new(&shared_option);
if (rv != 0) {
fprintf(stderr, "nghttp2_option_new: %s", nghttp2_strerror(rv));
exit(EXIT_FAILURE);
}
nghttp2_option_set_recv_client_preface(shared_option, 1);
rv = io_loop_add(&loop, serv.fd, EPOLLIN, &serv);
if (rv != 0) {
exit(EXIT_FAILURE);
}
rv = io_loop_add(&loop, tmr.fd, EPOLLIN, &tmr);
if (rv != 0) {
exit(EXIT_FAILURE);
}
update_date();
io_loop_run(&loop, &serv);
nghttp2_option_del(shared_option);
nghttp2_session_callbacks_del(shared_callbacks);
return 0;
}
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