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quite some changes to http server code

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This commit is contained in:
hyung-hwan 2020-05-16 19:12:10 +00:00
parent 98e2838edf
commit 619a7dd318
8 changed files with 513 additions and 260 deletions
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13
mio/lib/htrd.c
View File

@ -100,6 +100,8 @@ static MIO_INLINE int push_content (mio_htrd_t* htrd, const mio_bch_t* ptr, mio_
{ {
MIO_ASSERT (htrd->mio, len > 0); MIO_ASSERT (htrd->mio, len > 0);
if (htrd->recbs->push_content) return htrd->recbs->push_content(htrd, &htrd->re, ptr, len);
if (mio_htre_addcontent(&htrd->re, ptr, len) <= -1) if (mio_htre_addcontent(&htrd->re, ptr, len) <= -1)
{ {
htrd->errnum = MIO_HTRD_ENOMEM; htrd->errnum = MIO_HTRD_ENOMEM;
@ -907,8 +909,7 @@ badhdr:
return MIO_NULL; return MIO_NULL;
} }
static MIO_INLINE int parse_initial_line_and_headers ( static MIO_INLINE int parse_initial_line_and_headers (mio_htrd_t* htrd, const mio_bch_t* req, mio_oow_t rlen)
mio_htrd_t* htrd, const mio_bch_t* req, mio_oow_t rlen)
{ {
mio_bch_t* p; mio_bch_t* p;
@ -932,8 +933,8 @@ static MIO_INLINE int parse_initial_line_and_headers (
/* parse the initial line */ /* parse the initial line */
if (!(htrd->option & MIO_HTRD_SKIPINITIALLINE)) if (!(htrd->option & MIO_HTRD_SKIPINITIALLINE))
{ {
p = parse_initial_line (htrd, p); p = parse_initial_line(htrd, p);
if (p == MIO_NULL) return -1; if (MIO_UNLIKELY(!p)) return -1;
} }
/* parse header fields */ /* parse header fields */
@ -945,8 +946,8 @@ static MIO_INLINE int parse_initial_line_and_headers (
/* TODO: return error if protocol is 0.9. /* TODO: return error if protocol is 0.9.
* HTTP/0.9 must not get headers... */ * HTTP/0.9 must not get headers... */
p = parse_header_field (htrd, p, &htrd->re.hdrtab); p = parse_header_field(htrd, p, &htrd->re.hdrtab);
if (p == MIO_NULL) return -1; if (MIO_UNLIKELY(!p)) return -1;
} }
while (1); while (1);

738
mio/lib/http-svr.c
View File

@ -1,6 +1,7 @@
#include "mio-http.h" #include "mio-http.h"
#include "mio-htrd.h" #include "mio-htrd.h"
#include "mio-pro.h" /* for cgi */ #include "mio-pro.h" /* for cgi */
#include "mio-fmt.h"
#include "mio-prv.h" #include "mio-prv.h"
@ -23,6 +24,7 @@ struct mio_svc_htts_cli_t
mio_skad_t orgdst_addr; mio_skad_t orgdst_addr;
mio_htrd_t* htrd; mio_htrd_t* htrd;
mio_becs_t* sbuf; /* temporary buffer for status line formatting */ mio_becs_t* sbuf; /* temporary buffer for status line formatting */
mio_becs_t rbuf; /* data that has been read but unconsumed */
mio_svc_htts_rsrc_t rsrc; /* list head for resource list */ mio_svc_htts_rsrc_t rsrc; /* list head for resource list */
@ -306,6 +308,11 @@ static int init_client (mio_svc_htts_cli_t* cli, mio_dev_sck_t* sck)
cli->sbuf = mio_becs_open(sck->mio, 0, 2048); cli->sbuf = mio_becs_open(sck->mio, 0, 2048);
if (MIO_UNLIKELY(!cli->sbuf)) goto oops; if (MIO_UNLIKELY(!cli->sbuf)) goto oops;
/* the following actions from here down must not fail. otherwise,
* some more statements will have to be added under the oops: label */
mio_becs_init(&cli->rbuf, sck->mio, 0); /* it never fails if the capacity is zero */
htrdxtn = mio_htrd_getxtn(cli->htrd); htrdxtn = mio_htrd_getxtn(cli->htrd);
htrdxtn->sck = sck; /* TODO: remember cli instead? */ htrdxtn->sck = sck; /* TODO: remember cli instead? */
@ -338,6 +345,7 @@ static void fini_client (mio_svc_htts_cli_t* cli)
while (!RSRCL_IS_EMPTY(&cli->rsrc)) while (!RSRCL_IS_EMPTY(&cli->rsrc))
mio_svc_htts_rsrc_kill (RSRCL_FIRST_RSRC(&cli->rsrc)); mio_svc_htts_rsrc_kill (RSRCL_FIRST_RSRC(&cli->rsrc));
mio_becs_fini (&cli->rbuf);
if (cli->sbuf) if (cli->sbuf)
{ {
mio_becs_close (cli->sbuf); mio_becs_close (cli->sbuf);
@ -366,25 +374,28 @@ static int listener_on_read (mio_dev_sck_t* sck, const void* buf, mio_iolen_t le
/* unlike the function name, this callback is set on both the listener and the client. /* unlike the function name, this callback is set on both the listener and the client.
* however, it must never be triggered for the listener */ * however, it must never be triggered for the listener */
mio_t* mio = sck->mio;
mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(sck); mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(sck);
mio_oow_t rem; mio_oow_t rem;
int x; int x;
MIO_ASSERT (sck->mio, sck != cli->htts->lsck); MIO_ASSERT (mio, sck != cli->htts->lsck);
MIO_ASSERT (mio, RSRCL_IS_EMPTY(&cli->rsrc));
printf ("** HTTS - client read socket(%p) %d -> htts:%p\n", sck, (int)len, cli->htts); if (len <= -1)
{ {
mio_iolen_t i; MIO_DEBUG3 (mio, "HTTS(%p) - unable to read client socket %p(%d)\n", cli->htts, sck, (int)sck->hnd);
for (i = 0; i < len; i++) goto oops;
{ }
printf ("%c", ((const mio_uint8_t*)buf)[i]);
} if (len == 0)
}
if (len <= 0)
{ {
mio_dev_sck_halt (sck); mio_dev_sck_halt (sck);
goto oops;
} }
else if ((x = mio_htrd_feed(cli->htrd, buf, len, &rem)) <= -1)
feed_to_htrd:
if ((x = mio_htrd_feed(cli->htrd, buf, len, &rem)) <= -1)
{ {
/* in some cases, we may have to send some http response depending on the failure type */ /* in some cases, we may have to send some http response depending on the failure type */
/* BADRE -> bad request? */ /* BADRE -> bad request? */
@ -394,10 +405,26 @@ printf ("** HTTS - client htrd feed failure socket(%p) - %d\n", sck, x);
} }
else if (rem > 0) else if (rem > 0)
{ {
/* TODO: store the remaining data in the client's buffer */ /* the peek and poke handlers are called by mio_htrd_feed().
* mio_htrd_feed() returns after the handlers are finished. */
if (RSRCL_IS_EMPTY(&cli->rsrc))
{
/* no resource has been scheduled for the request. or the schedule job has been completed*/
len = rem;
buf = (mio_uint8_t*)buf + (len - rem);
goto feed_to_htrd;
}
/* TODO: don't use mio_becs_ncpy. this is not a string. no null termination is need */
MIO_ASSERT (mio, MIO_BECS_LEN(&cli->rbuf) == 0);
if (mio_becs_ncpy(&cli->rbuf, (mio_bch_t*)buf + (len - rem), rem) == (mio_oow_t)-1) goto oops;
} }
return 0; return 0;
oops:
mio_dev_sck_halt (sck);
} }
static int listener_on_write (mio_dev_sck_t* sck, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr) static int listener_on_write (mio_dev_sck_t* sck, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr)
@ -674,193 +701,6 @@ static MIO_INLINE void* mio_svc_htts_rsrc_getxtn (mio_svc_htts_rsrc_t* rsrc) { r
#define mio_svc_htts_rsrc_getxtn(rsrc) ((void*)((mio_svc_htts_rsrc_t*)rsrc + 1)) #define mio_svc_htts_rsrc_getxtn(rsrc) ((void*)((mio_svc_htts_rsrc_t*)rsrc + 1))
#endif #endif
/* ----------------------------------------------------------------- */
int mio_svc_htts_sendrsrc (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_svc_htts_rsrc_t* rsrc, int status_code, mio_http_method_t method, const mio_http_version_t* version, int keepalive)
{
mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(csck);
mio_bch_t dtbuf[64];
mio_oow_t x;
#if 0
if ((req->flags & MIO_HTRE_ATTR_EXPECT) &&
mio_comp_http_version_numbers(&req->version, 1, 1) >= 0 &&
mio_htre_getcontentlen(req) <= 0)
{
if (req->flags & MIO_HTRE_ATTR_EXPECT100)
{
mio_dev_sck_write(csck, "HTTP/1.1 100 Continue\r\n", 23, MIO_NULL, MIO_NULL);
}
else
{
}
}
#endif
mio_svc_htts_fmtgmtime(htts, MIO_NULL, dtbuf, MIO_COUNTOF(dtbuf));
x = mio_becs_fmt(cli->sbuf, "HTTP/%d.%d %d %hs\r\nServer: %hs\r\nDate: %hs\r\nConnection: %s\r\n",
(int)version->major, (int)version->minor,
(int)status_code, mio_http_status_to_bcstr(status_code),
htts->server_name,
dtbuf, /* Date */
(keepalive? "keep-alive": "close") /* Connection */
);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
if (rsrc->content_type)
{
x = mio_becs_fcat(cli->sbuf, "Content-Type: %hs\r\n", rsrc->content_type);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
}
if (rsrc->flags & MIO_SVC_HTTS_RSRC_FLAG_CONTENT_LENGTH_SET)
{
x = mio_becs_fcat(cli->sbuf, "Content-Length: %ju\r\n", (mio_uintmax_t)rsrc->content_length);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
}
x = mio_becs_fcat(cli->sbuf, "\r\n", rsrc->content_length);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
/* TODO: handle METHOD HEAD... should abort after header trasmission... */
/* TODO: allow extra header items */
/* TODO: use timedwrite? */
if (mio_dev_sck_write(csck, MIO_BECS_PTR(cli->sbuf), MIO_BECS_LEN(cli->sbuf), rsrc, MIO_NULL) <= -1)
{
mio_dev_sck_halt (csck);
return -1;
}
return 0;
}
/* ----------------------------------------------------------------- */
struct rsrc_file_xtn_t
{
int fd;
mio_foff_t range_offset;
mio_foff_t range_start;
mio_foff_t range_end;
mio_bch_t rbuf[4096];
};
typedef struct rsrc_file_xtn_t rsrc_file_xtn_t;
static int rsrc_file_on_write (mio_svc_htts_rsrc_t* rsrc, mio_dev_sck_t* sck)
{
rsrc_file_xtn_t* file = (rsrc_file_xtn_t*)mio_svc_htts_rsrc_getxtn(rsrc);
ssize_t n;
if (file->range_offset >= file->range_end) return 0; /* transmitted as long as content-length. end of the resource */
if (file->range_offset < file->range_start)
{
if (lseek(file->fd, SEEK_SET, file->range_start) == (off_t)-1) return -1;
file->range_offset = file->range_start;
}
n = read(file->fd, file->rbuf, MIO_SIZEOF(file->rbuf));
if (n <= 0) return -1;
if (n > file->range_end - file->range_start)
{
/* TODO: adjust */
n = file->range_end - file->range_start;
}
file->range_offset += n;
if (mio_dev_sck_write(sck, file->rbuf, n, rsrc, MIO_NULL) <= -1) return -1; /* failure */
return 1; /* keep calling me */
}
static void rsrc_file_on_kill (mio_svc_htts_rsrc_t* rsrc)
{
rsrc_file_xtn_t* file = (rsrc_file_xtn_t*)mio_svc_htts_rsrc_getxtn(rsrc);
if (file->fd >= 0)
{
close (file->fd);
file->fd = -1;
}
}
int mio_svc_htts_sendfile (mio_svc_htts_t* htts, mio_dev_sck_t* csck, const mio_bch_t* file_path, int status_code, mio_http_method_t method, const mio_http_version_t* version, int keepalive)
{
//mio_svc_htts_cli_t* cli = (mio_svc_htts_cli_t*)mio_dev_sck_getxtn(csck);
int fd;
struct stat st;
mio_svc_htts_rsrc_t* rsrc = MIO_NULL;
rsrc_file_xtn_t* rsrc_file;
fd = open(file_path, O_RDONLY, 0);
if (fd <= -1)
{
/* TODO: divert to writing status code not found... */
goto oops; /* write error status instead */
}
if (fstat(fd, &st) <= -1) goto oops; /* TODO: write error status instead. probably 500 internal server error???*/
rsrc = mio_svc_htts_rsrc_make(htts, csck, rsrc_file_on_write, rsrc_file_on_kill, MIO_SIZEOF(*rsrc_file));
if (MIO_UNLIKELY(!rsrc)) goto oops;
rsrc->flags = MIO_SVC_HTTS_RSRC_FLAG_CONTENT_LENGTH_SET;
rsrc->content_length = st.st_size;
rsrc->content_type = "text/plain";
rsrc_file = mio_svc_htts_rsrc_getxtn(rsrc);
rsrc_file->fd = fd;
rsrc_file->range_start = 0;
rsrc_file->range_end = st.st_size;
if (mio_svc_htts_sendrsrc(htts, csck, rsrc, 200, method, version, keepalive) <= -1) goto oops;
return 0;
oops:
if (rsrc) mio_svc_htts_rsrc_kill (rsrc);
if (fd >= 0) close (fd);
return -1;
}
int mio_svc_htts_dofile (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* req, const mio_bch_t* docroot)
{
switch (mio_htre_getqmethodtype(req))
{
case MIO_HTTP_OPTIONS:
mio_htre_discardcontent (req);
/* TODO: return 200 with Allow: OPTIONS, HEAD, GET, POST, PUT, DELETE... */
/* However, if there is access configuration, the item list must reflect it */
break;
case MIO_HTTP_HEAD:
case MIO_HTTP_GET:
case MIO_HTTP_POST:
mio_htre_discardcontent (req);
break;
case MIO_HTTP_PUT:
break;
case MIO_HTTP_DELETE:
mio_htre_discardcontent (req);
break;
default:
/* method not allowed */
mio_htre_discardcontent (req);
/* schedule to send 405 */
break;
}
return 0;
}
/* ----------------------------------------------------------------- */ /* ----------------------------------------------------------------- */
enum cgi_state_res_mode_t enum cgi_state_res_mode_t
@ -871,6 +711,7 @@ enum cgi_state_res_mode_t
}; };
typedef enum cgi_state_res_mode_t cgi_state_res_mode_t; typedef enum cgi_state_res_mode_t cgi_state_res_mode_t;
#define CGI_STATE_PENDING_IO_THRESHOLD 5
struct cgi_state_t struct cgi_state_t
{ {
@ -886,10 +727,11 @@ struct cgi_state_t
mio_dev_pro_t* peer; mio_dev_pro_t* peer;
mio_htrd_t* peer_htrd; mio_htrd_t* peer_htrd;
mio_svc_htts_cli_t* cli; mio_svc_htts_cli_t* cli;
mio_htre_t* req; mio_http_version_t req_version; /* client request */
mio_oow_t req_content_length; mio_oow_t req_content_length; /* client request content length */
cgi_state_res_mode_t res_mode_to_cli; cgi_state_res_mode_t res_mode_to_cli;
unsigned int peer_eof: 1;
mio_dev_sck_on_read_t cli_org_on_read; mio_dev_sck_on_read_t cli_org_on_read;
mio_dev_sck_on_write_t cli_org_on_write; mio_dev_sck_on_write_t cli_org_on_write;
@ -902,6 +744,20 @@ struct cgi_peer_xtn_t
}; };
typedef struct cgi_peer_xtn_t cgi_peer_xtn_t; typedef struct cgi_peer_xtn_t cgi_peer_xtn_t;
static void cgi_state_halt (cgi_state_t* cgi_state)
{
MIO_ASSERT (cgi_state->cli->htts->mio, cgi_state->cli != MIO_NULL);
MIO_ASSERT (cgi_state->cli->htts->mio, cgi_state->cli->sck != MIO_NULL);
MIO_DEBUG4 (cgi_state->cli->htts->mio, "HTTS(%p) - halting cgi state %p(client=%p,peer=%p)\n", cgi_state->cli->htts, cgi_state, cgi_state->cli->sck, cgi_state->peer);
mio_dev_sck_halt (cgi_state->cli->sck);
/* check for peer as it may not have been started */
if (cgi_state->peer) mio_dev_pro_halt (cgi_state->peer);
/* TODO: when to destroy cgi_state? */
}
static void cgi_state_on_kill (cgi_state_t* cgi_state) static void cgi_state_on_kill (cgi_state_t* cgi_state)
{ {
printf ("**** CGI_STATE_ON_KILL \n"); printf ("**** CGI_STATE_ON_KILL \n");
@ -928,21 +784,39 @@ printf ("**** CGI_STATE_ON_KILL \n");
cgi_state->cli->sck->on_write = cgi_state->cli_org_on_write; cgi_state->cli->sck->on_write = cgi_state->cli_org_on_write;
cgi_state->cli_org_on_write = MIO_NULL; cgi_state->cli_org_on_write = MIO_NULL;
} }
if (MIO_BECS_LEN(&cgi_state->cli->rbuf) > 0)
{
mio_svc_htts_cli_t* cli = cgi_state->cli;
/* TODO: trigger cli->on_read again (). */
/* mio_arrange_fake_on_read (mio, cli->sck, data, len, MIO_NULL);??? can i do this instead of calling on-read() here? */
cli->sck->on_read (cli->sck, MIO_BECS_PTR(&cli->rbuf), MIO_BECS_LEN(&cli->rbuf), MIO_NULL); /* TOOD: better error handling?? */
mio_becs_clear (&cli->rbuf);
}
} }
static void cgi_peer_on_close (mio_dev_pro_t* pro, mio_dev_pro_sid_t sid) static void cgi_peer_on_close (mio_dev_pro_t* pro, mio_dev_pro_sid_t sid)
{ {
mio_t* mio = pro->mio; mio_t* mio = pro->mio;
cgi_peer_xtn_t* cgi_peer = mio_dev_pro_getxtn(pro); cgi_peer_xtn_t* cgi_peer = mio_dev_pro_getxtn(pro);
cgi_state_t* cgi_state = cgi_peer->state;
MIO_ASSERT (mio, cgi_state->peer == pro);
if (sid == MIO_DEV_PRO_MASTER) if (sid == MIO_DEV_PRO_MASTER)
{ {
MIO_DEBUG1 (mio, "PROCESS(%d) CLOSE MASTER\n", (int)pro->child_pid); MIO_DEBUG3 (mio, "HTTS(%p) - peer %p(pid=%d) closing master\n", cgi_state->cli->htts, pro, (int)pro->child_pid);
cgi_peer->state->peer = MIO_NULL; /* clear this peer from the state */ cgi_peer->state->peer = MIO_NULL; /* clear this peer from the state */
} }
else else
{ {
MIO_DEBUG2 (mio, "PROCESS(%d) CLOSE SLAVE[%d]\n", (int)pro->child_pid, sid); MIO_DEBUG4 (mio, "HTTS(%p) - peer %p(pid=%d) closing slave[%d]\n", cgi_state->cli->htts, pro, (int)pro->child_pid, sid);
if (sid == MIO_DEV_PRO_OUT)
{
cgi_state->peer_eof = 1;
}
} }
} }
@ -952,87 +826,220 @@ static int cgi_peer_on_read (mio_dev_pro_t* pro, mio_dev_pro_sid_t sid, const vo
cgi_peer_xtn_t* cgi_peer = mio_dev_pro_getxtn(pro); cgi_peer_xtn_t* cgi_peer = mio_dev_pro_getxtn(pro);
cgi_state_t* cgi_state = cgi_peer->state; cgi_state_t* cgi_state = cgi_peer->state;
MIO_ASSERT (mio, sid == MIO_DEV_PRO_OUT); /* since MIO_DEV_PRO_ERRTONUL is used, there should be no input from MIO_DEV_PRO_ERR */
if (dlen <= -1) if (dlen <= -1)
{ {
MIO_DEBUG1 (mio, "PROCESS(%d): READ TIMED OUT...\n", (int)pro->child_pid); MIO_DEBUG3 (mio, "HTTPS(%p) - read error from peer %p(pid=%u)\n", cgi_state->cli->htts, pro, (unsigned int)pro->child_pid);
mio_dev_pro_halt (pro); goto oops;
} }
else if (dlen <= 0)
if (dlen == 0)
{ {
MIO_DEBUG1 (mio, "PROCESS(%d): EOF RECEIVED...\n", (int)pro->child_pid); MIO_DEBUG3 (mio, "HTTPS(%p) - EOF from peer %p(pid=%u)\n", cgi_state->cli->htts, pro, (unsigned int)pro->child_pid);
/* no outstanding request. but EOF */ cgi_state->peer_eof = 1;
/* TODO: arrange to finish chunk. or close... also finish the entire state... */
mio_dev_pro_halt (pro); /* don't care about cgi_state->num_pending_writes_to_client since this is the last read */
if (cgi_state->res_mode_to_cli == CGI_STATE_RES_MODE_CHUNKED &&
mio_dev_sck_write(cgi_state->cli->sck, "0\r\n\r\n", 5, MIO_NULL, MIO_NULL) <= -1) goto oops;
} }
else else
{ {
MIO_DEBUG5 (mio, "PROCESS(%d) READ DATA ON SLAVE[%d] len=%d [%.*hs]\n", (int)pro->child_pid, (int)sid, (int)dlen, dlen, (char*)data); mio_oow_t rem;
if (sid == MIO_DEV_PRO_OUT) printf ( "QQQQQQQQQQQQQQQQQQ>>>>>>>>>>>>>>>>>> feeding to peer htrd.... dlen => %d\n", (int)dlen);
{ if (mio_htrd_feed(cgi_state->peer_htrd, data, dlen, &rem) <= -1) goto oops;
//mio_dev_pro_read (pro, sid, 0); /* if (rem > 0) also something is not right */
//mio_dev_pro_write (pro, "HELLO\n", 6, MIO_NULL); }
/* If chunked, need to write in the chunked format... */ return 0;
cgi_state->num_pending_writes_to_client++;
if (mio_dev_sck_write(cgi_state->cli->sck, data, dlen, MIO_NULL, 0) <= -1) oops:
{ cgi_state_halt (cgi_state);
cgi_state->num_pending_writes_to_client--;
mio_dev_pro_halt (pro);
}
}
}
return 0; return 0;
} }
static int cgi_peer_capture_header (mio_htre_t* req, const mio_bch_t* key, const mio_htre_hdrval_t* val, void* ctx)
{
mio_svc_htts_cli_t* cli = (mio_svc_htts_cli_t*)ctx;
/* capture a header except Status, Connection, Transfer-Encoding, and Server */
if (mio_comp_bcstr(key, "Status", 1) != 0 &&
mio_comp_bcstr(key, "Connection", 1) != 0 &&
mio_comp_bcstr(key, "Transfer-Encoding", 1) != 0 &&
mio_comp_bcstr(key, "Server", 1) != 0)
{
do
{
if (mio_becs_cat(cli->sbuf, key) == (mio_oow_t)-1 ||
mio_becs_cat(cli->sbuf, ": ") == (mio_oow_t)-1 ||
mio_becs_cat(cli->sbuf, val->ptr) == (mio_oow_t)-1 ||
mio_becs_cat(cli->sbuf, "\r\n") == (mio_oow_t)-1)
{
return -1;
}
val = val->next;
}
while (val);
}
return 0;
}
static int cgi_peer_htrd_peek (mio_htrd_t* htrd, mio_htre_t* req)
{
cgi_peer_xtn_t* cgi_peer = mio_htrd_getxtn(htrd);
cgi_state_t* cgi_state = cgi_peer->state;
mio_svc_htts_cli_t* cli = cgi_state->cli;
int status_code;
if (req->attr.status)
{
}
else
{
}
status_code = 200;
printf ("CGI PEER HTRD PEEK...\n");
if (mio_becs_fmt(cli->sbuf, "HTTP/%d.%d %d %hs\r\n",
cgi_state->req_version.major, cgi_state->req_version.minor,
status_code, mio_http_status_to_bcstr(status_code)) == (mio_oow_t)-1) return -1;
if (mio_htre_walkheaders(req, cgi_peer_capture_header, cli) <= -1) return -1;
switch (cgi_state->res_mode_to_cli)
{
case CGI_STATE_RES_MODE_CHUNKED:
if (mio_becs_cat(cli->sbuf, "Transfer-Encoding: chunked\r\n") == (mio_oow_t)-1) return -1;
/*if (mio_becs_cat(cli->sbuf, "Connection: keep-alive\r\n") == (mio_oow_t)-1) return -1;*/
break;
case CGI_STATE_RES_MODE_CLOSE:
if (mio_becs_cat(cli->sbuf, "Connection: close\r\n") == (mio_oow_t)-1) return -1;
break;
}
if (mio_becs_cat(cli->sbuf, "\r\n") == (mio_oow_t)-1) return -1;
return mio_dev_sck_write(cli->sck, MIO_BECS_PTR(cli->sbuf), MIO_BECS_LEN(cli->sbuf), MIO_NULL, MIO_NULL);
}
static int cgi_peer_htrd_push_content (mio_htrd_t* htrd, mio_htre_t* req, const mio_bch_t* data, mio_oow_t dlen)
{
cgi_peer_xtn_t* cgi_peer = mio_htrd_getxtn(htrd);
cgi_state_t* cgi_state = cgi_peer->state;
MIO_ASSERT (cgi_state->cli->htts->mio, htrd == cgi_state->peer_htrd);
switch (cgi_state->res_mode_to_cli)
{
case CGI_STATE_RES_MODE_CHUNKED:
{
mio_iovec_t iov[3];
mio_bch_t lbuf[16];
mio_oow_t llen;
llen = mio_fmt_uintmax_to_bcstr(lbuf, MIO_COUNTOF(lbuf) - 2, dlen, 16, 0, '\0', MIO_NULL);
lbuf[llen++] = '\r';
lbuf[llen++] = '\n';
iov[0].iov_ptr = lbuf;
iov[0].iov_len = llen;
iov[1].iov_ptr = data;
iov[1].iov_len = dlen;
iov[2].iov_ptr = "\r\n";
iov[2].iov_len = 2;
cgi_state->num_pending_writes_to_client++;
if (mio_dev_sck_writev(cgi_state->cli->sck, iov, MIO_COUNTOF(iov), MIO_NULL, MIO_NULL) <= -1)
{
cgi_state->num_pending_writes_to_client--;
goto oops;
}
break;
}
case CGI_STATE_RES_MODE_CLOSE:
cgi_state->num_pending_writes_to_client++;
if (mio_dev_sck_write(cgi_state->cli->sck, data, dlen, MIO_NULL, MIO_NULL) <= -1)
{
cgi_state->num_pending_writes_to_client--;
goto oops;
}
}
if (cgi_state->num_pending_writes_to_client > CGI_STATE_PENDING_IO_THRESHOLD)
{
if (mio_dev_pro_read(cgi_state->peer, MIO_DEV_PRO_OUT, 0) <= -1) goto oops;
}
return 0;
oops:
return -1;
}
static mio_htrd_recbs_t cgi_peer_htrd_recbs =
{
cgi_peer_htrd_peek,
MIO_NULL,
cgi_peer_htrd_push_content
};
static int cgi_peer_on_write (mio_dev_pro_t* pro, mio_iolen_t wrlen, void* wrctx) static int cgi_peer_on_write (mio_dev_pro_t* pro, mio_iolen_t wrlen, void* wrctx)
{ {
mio_t* mio = pro->mio; mio_t* mio = pro->mio;
cgi_peer_xtn_t* cgi_peer = mio_dev_pro_getxtn(pro); cgi_peer_xtn_t* cgi_peer = mio_dev_pro_getxtn(pro);
cgi_state_t* cgi_state = cgi_peer->state; cgi_state_t* cgi_state = cgi_peer->state;
mio_ntime_t tmout;
MIO_ASSERT (mio, cgi_state->peer == pro);
if (wrlen <= -1) if (wrlen <= -1)
{ {
MIO_DEBUG1 (mio, "PROCESS(%d): WRITE TIMED OUT...\n", (int)pro->child_pid); MIO_DEBUG3 (mio, "HTTS(%p) - unable to write to peer %p(pid=%u)\n", cgi_state->cli->htts, pro, (int)pro->child_pid);
mio_dev_pro_halt (pro); goto oops;
return 0;
} }
MIO_DEBUG2 (mio, "PROCESS(%d) wrote data of %d bytes\n", (int)pro->child_pid, (int)wrlen);
#if 0
/*mio_dev_pro_read (pro, MIO_DEV_PRO_OUT, 1);*/
MIO_INIT_NTIME (&tmout, 5, 0);
mio_dev_pro_timedread (pro, MIO_DEV_PRO_OUT, 1, &tmout);
#endif
#if 0
if (mio_dev_pro_write(pro, cgi_peer->cli->req, length, MIO_NULL) <= -1)
{
/* halt both peer and cli */
}
#endif
cgi_state->num_pending_writes_to_peer--; cgi_state->num_pending_writes_to_peer--;
if (cgi_state->num_pending_writes_to_peer == CGI_STATE_PENDING_IO_THRESHOLD)
{
if (mio_dev_sck_read(cgi_state->cli->sck, 0) <= -1) goto oops;
}
return 0;
oops:
cgi_state_halt (cgi_state);
return 0; return 0;
} }
static int cgi_client_on_read (mio_dev_sck_t* sck, const void* buf, mio_iolen_t len, const mio_skad_t* srcaddr) static int cgi_client_on_read (mio_dev_sck_t* sck, const void* buf, mio_iolen_t len, const mio_skad_t* srcaddr)
{ {
mio_t* mio = sck->mio;
mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(sck); mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(sck);
cgi_state_t* cgi_state = RSRCL_FIRST_RSRC(&cli->rsrc); cgi_state_t* cgi_state = RSRCL_FIRST_RSRC(&cli->rsrc);
MIO_ASSERT (mio, sck == cli->sck);
printf ("** HTTS - cgi client read %p %d -> htts:%p\n", sck, (int)len, cli->htts); printf ("** HTTS - cgi client read %p %d -> htts:%p\n", sck, (int)len, cli->htts);
if (len <= -1) if (len <= -1)
{ {
/* read error */ /* read error */
MIO_DEBUG2 (cli->htts->mio, "HTTPS(%p) - read error on client socket %p(%d)\n", sck, (int)sck->hnd);
goto oops; goto oops;
} }
else if (len == 0)
if (!cgi_state->peer)
{ {
/* EOF */ /* the peer is gone */
goto oops; /* do what? just return 0? */
}
if (len == 0)
{
/* EOF on the client side. arrange to close */
if (mio_dev_pro_write(cgi_state->peer, MIO_NULL, 0, MIO_NULL) <= -1) goto oops;
} }
else else
{ {
@ -1044,7 +1051,6 @@ printf ("** HTTS - cgi client read %p %d -> htts:%p\n", sck, (int)len, cli->h
/* TODO: there is left-over data */ /* TODO: there is left-over data */
} }
#endif #endif
cgi_state->num_pending_writes_to_peer++; cgi_state->num_pending_writes_to_peer++;
if (mio_dev_pro_write(cgi_state->peer, buf, len, MIO_NULL) <= -1) if (mio_dev_pro_write(cgi_state->peer, buf, len, MIO_NULL) <= -1)
{ {
@ -1052,7 +1058,7 @@ printf ("** HTTS - cgi client read %p %d -> htts:%p\n", sck, (int)len, cli->h
goto oops; goto oops;
} }
if (cgi_state->num_pending_writes_to_peer > 1) if (cgi_state->num_pending_writes_to_peer > CGI_STATE_PENDING_IO_THRESHOLD)
{ {
if (mio_dev_sck_read(sck, 0) <= -1) goto oops; /* disable input watching */ if (mio_dev_sck_read(sck, 0) <= -1) goto oops; /* disable input watching */
} }
@ -1062,17 +1068,41 @@ printf ("** HTTS - cgi client read %p %d -> htts:%p\n", sck, (int)len, cli->h
oops: oops:
/* TODO: arrange to kill the entire cgi_state??? */ /* TODO: arrange to kill the entire cgi_state??? */
mio_dev_sck_halt (sck); cgi_state_halt (cgi_state);
return 0; return 0;
} }
static int cgi_client_on_write (mio_dev_sck_t* sck, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr) static int cgi_client_on_write (mio_dev_sck_t* sck, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr)
{ {
mio_t* mio = sck->mio;
mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(sck); mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(sck);
cgi_state_t* cgi_state = RSRCL_FIRST_RSRC(&cli->rsrc); cgi_state_t* cgi_state = RSRCL_FIRST_RSRC(&cli->rsrc);
if (wrlen <= -1)
{
MIO_DEBUG3 (mio, "HTTPS(%p) - unable to write to client socket %p(%d)\n", sck->mio, sck, (int)sck->hnd);
goto oops;
}
printf ("MANAGED TO WRITE TO CLIENT>... %d\n", (int)wrlen);
cgi_state->num_pending_writes_to_client--;
if (cgi_state->peer && cgi_state->num_pending_writes_to_client == CGI_STATE_PENDING_IO_THRESHOLD)
{
if (mio_dev_pro_read(cgi_state->peer, MIO_DEV_PRO_OUT, 1) <= -1) goto oops;
}
/* in case the peer died before peer read handler reads EOF */
if (cgi_state->peer_eof && cgi_state->num_pending_writes_to_client <= 0)
{
/*if (no_more_input is to be read from the client)*/
cgi_state_halt (cgi_state); // must not use this... must kill the state ...
/* finished writing all */
}
return 0;
oops:
cgi_state_halt (cgi_state);
return 0; return 0;
} }
@ -1142,7 +1172,7 @@ int mio_svc_htts_docgi (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* r
cgi_state->cli = cli; cgi_state->cli = cli;
/*cgi_state->num_pending_writes_to_client = 0; /*cgi_state->num_pending_writes_to_client = 0;
cgi_state->num_pending_writes_to_peer = 0;*/ cgi_state->num_pending_writes_to_peer = 0;*/
cgi_state->req = req; cgi_state->req_version = *mio_htre_getversion(req);
cgi_state->req_content_length = req_content_length; cgi_state->req_content_length = req_content_length;
cgi_state->cli_org_on_read = csck->on_read; cgi_state->cli_org_on_read = csck->on_read;
@ -1163,6 +1193,9 @@ int mio_svc_htts_docgi (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* r
cgi_state->peer_htrd = mio_htrd_open(mio, MIO_SIZEOF(*cgi_peer)); cgi_state->peer_htrd = mio_htrd_open(mio, MIO_SIZEOF(*cgi_peer));
if (MIO_UNLIKELY(!cgi_state->peer_htrd)) goto oops; if (MIO_UNLIKELY(!cgi_state->peer_htrd)) goto oops;
mio_htrd_setopt (cgi_state->peer_htrd, MIO_HTRD_SKIPINITIALLINE | MIO_HTRD_RESPONSE);
mio_htrd_setrecbs (cgi_state->peer_htrd, &cgi_peer_htrd_recbs);
cgi_peer = mio_htrd_getxtn(cgi_state->peer_htrd); cgi_peer = mio_htrd_getxtn(cgi_state->peer_htrd);
cgi_peer->state = cgi_state; cgi_peer->state = cgi_state;
/* TODO: any other handling before this? */ /* TODO: any other handling before this? */
@ -1221,6 +1254,7 @@ int mio_svc_htts_docgi (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* r
if (mio_dev_sck_read(csck, 0) <= -1) goto oops; if (mio_dev_sck_read(csck, 0) <= -1) goto oops;
} }
cgi_state->res_mode_to_cli = (req->flags & MIO_HTRE_ATTR_KEEPALIVE)? CGI_STATE_RES_MODE_CHUNKED: CGI_STATE_RES_MODE_CLOSE;
return 0; return 0;
oops: oops:
@ -1232,6 +1266,40 @@ oops:
/* ----------------------------------------------------------------- */ /* ----------------------------------------------------------------- */
int mio_svc_htts_dofile (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* req, const mio_bch_t* docroot)
{
switch (mio_htre_getqmethodtype(req))
{
case MIO_HTTP_OPTIONS:
mio_htre_discardcontent (req);
/* TODO: return 200 with Allow: OPTIONS, HEAD, GET, POST, PUT, DELETE... */
/* However, if there is access configuration, the item list must reflect it */
break;
case MIO_HTTP_HEAD:
case MIO_HTTP_GET:
case MIO_HTTP_POST:
mio_htre_discardcontent (req);
break;
case MIO_HTTP_PUT:
break;
case MIO_HTTP_DELETE:
mio_htre_discardcontent (req);
break;
default:
/* method not allowed */
mio_htre_discardcontent (req);
/* schedule to send 405 */
break;
}
return 0;
}
/* ----------------------------------------------------------------- */
int mio_svc_htts_doproxy (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* req, const mio_bch_t* upstream) int mio_svc_htts_doproxy (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_htre_t* req, const mio_bch_t* upstream)
{ {
@ -1474,3 +1542,173 @@ void mio_svc_htts_fmtgmtime (mio_svc_htts_t* htts, const mio_ntime_t* nt, mio_bc
mio_fmt_http_time_to_bcstr(nt, buf, len); mio_fmt_http_time_to_bcstr(nt, buf, len);
} }
#if 0
/* ----------------------------------------------------------------- */
int mio_svc_htts_sendrsrc (mio_svc_htts_t* htts, mio_dev_sck_t* csck, mio_svc_htts_rsrc_t* rsrc, int status_code, mio_http_method_t method, const mio_http_version_t* version, int keepalive)
{
mio_svc_htts_cli_t* cli = mio_dev_sck_getxtn(csck);
mio_bch_t dtbuf[64];
mio_oow_t x;
#if 0
if ((req->flags & MIO_HTRE_ATTR_EXPECT) &&
mio_comp_http_version_numbers(&req->version, 1, 1) >= 0 &&
mio_htre_getcontentlen(req) <= 0)
{
if (req->flags & MIO_HTRE_ATTR_EXPECT100)
{
mio_dev_sck_write(csck, "HTTP/1.1 100 Continue\r\n", 23, MIO_NULL, MIO_NULL);
}
else
{
}
}
#endif
mio_svc_htts_fmtgmtime(htts, MIO_NULL, dtbuf, MIO_COUNTOF(dtbuf));
x = mio_becs_fmt(cli->sbuf, "HTTP/%d.%d %d %hs\r\nServer: %hs\r\nDate: %hs\r\nConnection: %s\r\n",
(int)version->major, (int)version->minor,
(int)status_code, mio_http_status_to_bcstr(status_code),
htts->server_name,
dtbuf, /* Date */
(keepalive? "keep-alive": "close") /* Connection */
);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
if (rsrc->content_type)
{
x = mio_becs_fcat(cli->sbuf, "Content-Type: %hs\r\n", rsrc->content_type);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
}
if (rsrc->flags & MIO_SVC_HTTS_RSRC_FLAG_CONTENT_LENGTH_SET)
{
x = mio_becs_fcat(cli->sbuf, "Content-Length: %ju\r\n", (mio_uintmax_t)rsrc->content_length);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
}
x = mio_becs_fcat(cli->sbuf, "\r\n", rsrc->content_length);
if (MIO_UNLIKELY(x == (mio_oow_t)-1)) return -1;
/* TODO: handle METHOD HEAD... should abort after header trasmission... */
/* TODO: allow extra header items */
/* TODO: use timedwrite? */
if (mio_dev_sck_write(csck, MIO_BECS_PTR(cli->sbuf), MIO_BECS_LEN(cli->sbuf), rsrc, MIO_NULL) <= -1)
{
mio_dev_sck_halt (csck);
return -1;
}
return 0;
}
/* ----------------------------------------------------------------- */
struct rsrc_file_xtn_t
{
int fd;
mio_foff_t range_offset;
mio_foff_t range_start;
mio_foff_t range_end;
mio_bch_t rbuf[4096];
};
typedef struct rsrc_file_xtn_t rsrc_file_xtn_t;
static int rsrc_file_on_write (mio_svc_htts_rsrc_t* rsrc, mio_dev_sck_t* sck)
{
rsrc_file_xtn_t* file = (rsrc_file_xtn_t*)mio_svc_htts_rsrc_getxtn(rsrc);
ssize_t n;
if (file->range_offset >= file->range_end) return 0; /* transmitted as long as content-length. end of the resource */
if (file->range_offset < file->range_start)
{
if (lseek(file->fd, SEEK_SET, file->range_start) == (off_t)-1) return -1;
file->range_offset = file->range_start;
}
n = read(file->fd, file->rbuf, MIO_SIZEOF(file->rbuf));
if (n <= 0) return -1;
if (n > file->range_end - file->range_start)
{
/* TODO: adjust */
n = file->range_end - file->range_start;
}
file->range_offset += n;
if (mio_dev_sck_write(sck, file->rbuf, n, rsrc, MIO_NULL) <= -1) return -1; /* failure */
return 1; /* keep calling me */
}
static void rsrc_file_on_kill (mio_svc_htts_rsrc_t* rsrc)
{
rsrc_file_xtn_t* file = (rsrc_file_xtn_t*)mio_svc_htts_rsrc_getxtn(rsrc);
if (file->fd >= 0)
{
close (file->fd);
file->fd = -1;
}
}
int mio_svc_htts_sendfile (mio_svc_htts_t* htts, mio_dev_sck_t* csck, const mio_bch_t* file_path, int status_code, mio_http_method_t method, const mio_http_version_t* version, int keepalive)
{
//mio_svc_htts_cli_t* cli = (mio_svc_htts_cli_t*)mio_dev_sck_getxtn(csck);
int fd;
struct stat st;
mio_svc_htts_rsrc_t* rsrc = MIO_NULL;
rsrc_file_xtn_t* rsrc_file;
fd = open(file_path, O_RDONLY, 0);
if (fd <= -1)
{
/* TODO: divert to writing status code not found... */
goto oops; /* write error status instead */
}
if (fstat(fd, &st) <= -1) goto oops; /* TODO: write error status instead. probably 500 internal server error???*/
rsrc = mio_svc_htts_rsrc_make(htts, csck, rsrc_file_on_write, rsrc_file_on_kill, MIO_SIZEOF(*rsrc_file));
if (MIO_UNLIKELY(!rsrc)) goto oops;
rsrc->flags = MIO_SVC_HTTS_RSRC_FLAG_CONTENT_LENGTH_SET;
rsrc->content_length = st.st_size;
rsrc->content_type = "text/plain";
rsrc_file = mio_svc_htts_rsrc_getxtn(rsrc);
rsrc_file->fd = fd;
rsrc_file->range_start = 0;
rsrc_file->range_end = st.st_size;
if (mio_svc_htts_sendrsrc(htts, csck, rsrc, 200, method, version, keepalive) <= -1) goto oops;
return 0;
oops:
if (rsrc) mio_svc_htts_rsrc_kill (rsrc);
if (fd >= 0) close (fd);
return -1;
}
#endif

1
mio/lib/mio-htrd.h
View File

@ -72,6 +72,7 @@ struct mio_htrd_recbs_t
{ {
int (*peek) (mio_htrd_t* htrd, mio_htre_t* re); int (*peek) (mio_htrd_t* htrd, mio_htre_t* re);
int (*poke) (mio_htrd_t* htrd, mio_htre_t* re); int (*poke) (mio_htrd_t* htrd, mio_htre_t* re);
int (*push_content) (mio_htrd_t* htrd, mio_htre_t* re, const mio_bch_t* data, mio_oow_t len);
}; };
struct mio_htrd_t struct mio_htrd_t

2
mio/lib/mio-pro.h
View File

@ -31,7 +31,7 @@
enum mio_dev_pro_sid_t enum mio_dev_pro_sid_t
{ {
MIO_DEV_PRO_MASTER = -1, MIO_DEV_PRO_MASTER = -1, /* no io occurs on this. used only in on_close() */
MIO_DEV_PRO_IN = 0, /* input of the child process */ MIO_DEV_PRO_IN = 0, /* input of the child process */
MIO_DEV_PRO_OUT = 1, /* output of the child process */ MIO_DEV_PRO_OUT = 1, /* output of the child process */
MIO_DEV_PRO_ERR = 2 /* error output of the child process */ MIO_DEV_PRO_ERR = 2 /* error output of the child process */

9
mio/lib/mio.c
View File

@ -633,6 +633,15 @@ static MIO_INLINE void handle_event (mio_t* mio, mio_dev_t* dev, int events, int
* halt the device. this check is performed after * halt the device. this check is performed after
* EPOLLIN or EPOLLOUT check because EPOLLERR or EPOLLHUP * EPOLLIN or EPOLLOUT check because EPOLLERR or EPOLLHUP
* can be set together with EPOLLIN or EPOLLOUT. */ * can be set together with EPOLLIN or EPOLLOUT. */
if (!(dev->dev_cap & MIO_DEV_CAP_IN_CLOSED))
{
/* this is simulated EOF. the INPUT side has not been closed on the device
* but there is the hangup/error event. */
dev->dev_evcb->on_read (dev, MIO_NULL, -!!(events & MIO_DEV_EVENT_ERR), MIO_NULL);
/* i don't care about the return value since the device will be halted below
* if both MIO_DEV_CAP_IN_CLOSE and MIO_DEV_CAP_OUT_CLOSED are set */
}
dev->dev_cap |= MIO_DEV_CAP_IN_CLOSED | MIO_DEV_CAP_OUT_CLOSED; dev->dev_cap |= MIO_DEV_CAP_IN_CLOSED | MIO_DEV_CAP_OUT_CLOSED;
dev->dev_cap |= MIO_DEV_CAP_RENEW_REQUIRED; dev->dev_cap |= MIO_DEV_CAP_RENEW_REQUIRED;
} }

2
mio/lib/pro.c
View File

@ -636,7 +636,7 @@ static int dev_pro_ioctl (mio_dev_t* dev, int cmd, void* arg)
case MIO_DEV_PRO_KILL_CHILD: case MIO_DEV_PRO_KILL_CHILD:
if (rdev->child_pid >= 0) if (rdev->child_pid >= 0)
{ {
if (kill (rdev->child_pid, SIGKILL) == -1) if (kill(rdev->child_pid, SIGKILL) == -1)
{ {
mio_seterrwithsyserr (mio, 0, errno); mio_seterrwithsyserr (mio, 0, errno);
return -1; return -1;

4
mio/t/b.sh
View File

@ -1,3 +1,7 @@
#!/bin/sh #!/bin/sh
echo "Content-Type: text/plain"
echo "Custom-Attribute: abcdef"
echo
exec cat /home/hyung-hwan/projects/hawk/lib/run.c exec cat /home/hyung-hwan/projects/hawk/lib/run.c

4
mio/t/http1.hawk
View File

@ -4,12 +4,12 @@ BEGIN {
x = sys::socket (sys::AF_INET, sys::SOCK_STREAM, 0); x = sys::socket (sys::AF_INET, sys::SOCK_STREAM, 0);
sys::connect (x, "127.0.0.1:9988"); sys::connect (x, "127.0.0.1:9988");
msg = b"GET /home/hyung-hwan/projects/mio/bld/b.sh HTTP/1.0\r\n\ msg = b"GET /home/hyung-hwan/projects/mio/t/b.sh HTTP/1.1\r\n\
Host: www.google.com\r\n\ Host: www.google.com\r\n\
Connection: Keep-Alive\r\n\r\n"; Connection: Keep-Alive\r\n\r\n";
sys::write (x, msg); sys::write (x, msg);
while (sys::read (x, buf) >= 0) printf ("%s", buf); while (sys::read (x, buf) > 0) printf ("%s", buf);
sys::close (x); sys::close (x);
} }