FastCGI application to run cgi applications https://redmine.lighttpd.net/projects/fcgi-cgi
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "fastcgi.h"
#include <arpa/inet.h>
#include <errno.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
typedef struct fastcgi_queue_link {
GList queue_link;
enum { FASTCGI_QUEUE_STRING, FASTCGI_QUEUE_BYTEARRAY } elem_type;
} fastcgi_queue_link;
/* some util functions */
#define GSTR_LEN(x) ((x) ? (x)->str : ""), ((x) ? (x)->len : 0)
#define GBARR_LEN(x) ((x)->data), ((x)->len)
#define UNUSED(x) ((void)(x))
#define ERROR(...) g_printerr("fastcgi.c:" G_STRINGIFY(__LINE__) ": " __VA_ARGS__)
static void fd_init(int fd) {
#ifdef _WIN32
int i = 1;
#endif
#ifdef FD_CLOEXEC
/* close fd on exec (cgi) */
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
#ifdef O_NONBLOCK
fcntl(fd, F_SETFL, O_NONBLOCK | O_RDWR);
#elif defined _WIN32
ioctlsocket(fd, FIONBIO, &i);
#endif
}
static fastcgi_queue_link* fastcgi_queue_link_new_string(GString *s) {
fastcgi_queue_link *l = g_slice_new0(fastcgi_queue_link);
l->queue_link.data = s;
l->elem_type = FASTCGI_QUEUE_STRING;
return l;
}
static fastcgi_queue_link* fastcgi_queue_link_new_bytearray(GByteArray *a) {
fastcgi_queue_link *l = g_slice_new0(fastcgi_queue_link);
l->queue_link.data = a;
l->elem_type = FASTCGI_QUEUE_BYTEARRAY ;
return l;
}
static void fastcgi_queue_link_free(fastcgi_queue *queue, fastcgi_queue_link *l) {
switch (l->elem_type) {
case FASTCGI_QUEUE_STRING:
if (queue) queue->length -= ((GString*)l->queue_link.data)->len;
g_string_free(l->queue_link.data, TRUE);
break;
case FASTCGI_QUEUE_BYTEARRAY:
if (queue) queue->length -= ((GByteArray*)l->queue_link.data)->len;
g_byte_array_free(l->queue_link.data, TRUE);
break;
}
g_slice_free(fastcgi_queue_link, l);
}
static fastcgi_queue_link *fastcgi_queue_peek_head(fastcgi_queue *queue) {
return (fastcgi_queue_link*) g_queue_peek_head_link(&queue->queue);
}
static fastcgi_queue_link *fastcgi_queue_pop_head(fastcgi_queue *queue) {
return (fastcgi_queue_link*) g_queue_pop_head_link(&queue->queue);
}
void fastcgi_queue_clear(fastcgi_queue *queue) {
fastcgi_queue_link *l;
queue->offset = 0;
while (NULL != (l = fastcgi_queue_pop_head(queue))) {
fastcgi_queue_link_free(queue, l);
}
g_assert(0 == queue->length);
}
void fastcgi_queue_append_string(fastcgi_queue *queue, GString *buf) {
fastcgi_queue_link *l;
if (!buf) return;
if (!buf->len) { g_string_free(buf, TRUE); return; }
l = fastcgi_queue_link_new_string(buf);
g_queue_push_tail_link(&queue->queue, (GList*) l);
queue->length += buf->len;
}
void fastcgi_queue_append_bytearray(fastcgi_queue *queue, GByteArray *buf) {
fastcgi_queue_link *l;
if (!buf) return;
if (!buf->len) { g_byte_array_free(buf, TRUE); return; }
l = fastcgi_queue_link_new_bytearray(buf);
g_queue_push_tail_link(&queue->queue, (GList*) l);
queue->length += buf->len;
}
/* return values: 0 ok, -1 error, -2 con closed */
gint fastcgi_queue_write(int fd, fastcgi_queue *queue, gsize max_write) {
gsize rem_write = max_write;
g_assert(rem_write <= G_MAXSSIZE);
#ifdef TCP_CORK
int corked = 0;
#endif
#ifdef TCP_CORK
/* Linux: put a cork into the socket as we want to combine the write() calls
* but only if we really have multiple chunks
*/
if (queue->queue.length > 1) {
corked = 1;
setsockopt(fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
while (rem_write > 0 && queue->length > 0) {
fastcgi_queue_link *l = fastcgi_queue_peek_head(queue);
gsize towrite, datalen;
gssize res;
gchar *data;
switch (l->elem_type) {
case FASTCGI_QUEUE_STRING:
data = ((GString*) l->queue_link.data)->str;
datalen = towrite = ((GString*) l->queue_link.data)->len;
break;
case FASTCGI_QUEUE_BYTEARRAY:
data = (gchar*) ((GByteArray*) l->queue_link.data)->data;
datalen = towrite = ((GByteArray*) l->queue_link.data)->len;
break;
default:
g_error("invalid fastcgi_queue_link type\n");
}
towrite -= queue->offset; data += queue->offset;
if (towrite > rem_write) towrite = rem_write;
res = write(fd, data, towrite);
if (-1 == res) {
#ifdef TCP_CORK
if (corked) {
corked = 0;
setsockopt(fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
switch (errno) {
case EINTR:
case EAGAIN:
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
return 0; /* try again later */
case ECONNRESET:
case EPIPE:
return -2;
default:
ERROR("write to fd=%d failed, %s\n", fd, g_strerror(errno) );
return -1;
}
} else {
queue->offset += res;
rem_write -= res;
if (queue->offset == datalen) {
queue->offset = 0;
fastcgi_queue_link_free(queue, fastcgi_queue_pop_head(queue));
}
}
}
#ifdef TCP_CORK
if (corked) {
corked = 0;
setsockopt(fd, IPPROTO_TCP, TCP_CORK, &corked, sizeof(corked));
}
#endif
return 0;
}
static void ev_io_add_events(struct ev_loop *loop, ev_io *watcher, int events) {
if ((watcher->events & events) == events) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events | events);
ev_io_start(loop, watcher);
}
static void ev_io_rem_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (0 == (watcher->events & events)) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events & ~events);
ev_io_start(loop, watcher);
}
/* end: some util functions */
static const guint8 __padding[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
static void append_padding_str(GString *s, guint8 padlen) {
g_string_append_len(s, (const gchar*) __padding, padlen);
}
static void append_padding_bytearray(GByteArray *a, guint8 padlen) {
g_byte_array_append(a, __padding, padlen);
}
/* returns padding length */
static guint8 stream_build_fcgi_record(GByteArray *buf, guint8 type, guint16 requestid, guint16 datalen) {
guint8 padlen = (8 - (datalen & 0x7)) % 8; /* padding must be < 8 */
/* alloc enough space */
g_byte_array_set_size(buf, FCGI_HEADER_LEN);
buf->len = 0;
buf->data[buf->len++] = FCGI_VERSION_1;
buf->data[buf->len++] = type;
buf->data[buf->len++] = (guint8) (requestid >> 8);
buf->data[buf->len++] = (guint8) (requestid);
buf->data[buf->len++] = (guint8) (datalen >> 8);
buf->data[buf->len++] = (guint8) (datalen);
buf->data[buf->len++] = padlen;
buf->data[buf->len++] = 0;
return padlen;
}
/* returns padding length */
static guint8 stream_send_fcgi_record(fastcgi_queue *out, guint8 type, guint16 requestid, guint16 datalen) {
GByteArray *record = g_byte_array_sized_new(FCGI_HEADER_LEN);
guint8 padlen = stream_build_fcgi_record(record, type, requestid, datalen);
fastcgi_queue_append_bytearray(out, record);
return padlen;
}
static void stream_send_data(fastcgi_queue *out, guint8 type, guint16 requestid, const guint8 *data, size_t datalen) {
while (datalen > 0) {
guint16 tosend = (datalen > G_MAXUINT16) ? G_MAXUINT16 : datalen;
guint8 padlen = stream_send_fcgi_record(out, type, requestid, tosend);
GByteArray *buf = g_byte_array_sized_new(tosend + padlen);
g_byte_array_append(buf, data, tosend);
append_padding_bytearray(buf, padlen);
fastcgi_queue_append_bytearray(out, buf);
data += tosend;
datalen -= tosend;
}
}
/* kills string */
static void stream_send_string(fastcgi_queue *out, guint8 type, guint16 requestid, GString *data) {
if (data->len > G_MAXUINT16) {
stream_send_data(out, type, requestid, (const guint8*) GSTR_LEN(data));
g_string_free(data, TRUE);
} else {
guint8 padlen = stream_send_fcgi_record(out, type, requestid, data->len);
append_padding_str(data, padlen);
fastcgi_queue_append_string(out, data);
}
}
/* kills bytearray */
static void stream_send_bytearray(fastcgi_queue *out, guint8 type, guint16 requestid, GByteArray *data) {
if (data->len > G_MAXUINT16) {
stream_send_data(out, type, requestid, GBARR_LEN(data));
g_byte_array_free(data, TRUE);
} else {
guint8 padlen = stream_send_fcgi_record(out, type, requestid, data->len);
append_padding_bytearray(data, padlen);
fastcgi_queue_append_bytearray(out, data);
}
}
static void stream_send_end_request(fastcgi_queue *out, guint16 requestID, gint32 appStatus, enum FCGI_ProtocolStatus status) {
GByteArray *record;
record = g_byte_array_sized_new(16);
stream_build_fcgi_record(record, FCGI_END_REQUEST, requestID, 8);
/* alloc enough space */
g_byte_array_set_size(record, 16);
record->len = 8;
appStatus = htonl(appStatus);
g_byte_array_append(record, (const guchar*) &appStatus, sizeof(appStatus));
record->data[record->len++] = status;
g_byte_array_append(record, __padding, 3);
fastcgi_queue_append_bytearray(out, record);
}
static void write_queue(fastcgi_connection *fcon) {
if (fcon->closing) return;
if (fastcgi_queue_write(fcon->fd, &fcon->write_queue, 256*1024) < 0) {
fastcgi_connection_close(fcon);
return;
}
if (fcon->fsrv->callbacks->cb_wrote_data) {
fcon->fsrv->callbacks->cb_wrote_data(fcon);
}
if (!fcon->closing) {
if (fcon->write_queue.length > 0) {
ev_io_add_events(fcon->fsrv->loop, &fcon->fd_watcher, EV_WRITE);
} else {
ev_io_rem_events(fcon->fsrv->loop, &fcon->fd_watcher, EV_WRITE);
if (0 == fcon->requestID) {
if (!(fcon->flags & FCGI_KEEP_CONN)) {
fastcgi_connection_close(fcon);
}
}
}
}
}
static GByteArray* read_chunk(fastcgi_connection *fcon, guint maxlen) {
gssize res;
GByteArray *buf;
int tmp_errno;
buf = g_byte_array_sized_new(maxlen);
g_byte_array_set_size(buf, maxlen);
if (0 == maxlen) return buf;
res = read(fcon->fd, buf->data, maxlen);
if (res == -1) {
tmp_errno = errno;
g_byte_array_free(buf, TRUE);
errno = tmp_errno;
return NULL;
} else if (res == 0) {
g_byte_array_free(buf, TRUE);
errno = ECONNRESET;
return NULL;
} else {
g_byte_array_set_size(buf, res);
return buf;
}
}
/* read content + padding, but only returns content data. decrements counters */
static GByteArray *read_content(fastcgi_connection *fcon) {
GByteArray *buf;
buf = read_chunk(fcon, fcon->content_remaining + fcon->padding_remaining);
if (!buf) return NULL;
if (buf->len > fcon->content_remaining) {
fcon->padding_remaining -= (buf->len - fcon->content_remaining);
g_byte_array_set_size(buf, fcon->content_remaining);
fcon->content_remaining = 0;
} else {
fcon->content_remaining -= buf->len;
}
return buf;
}
static gboolean read_append_chunk(fastcgi_connection *fcon, GByteArray *buf) {
gssize res;
int tmp_errno;
guint curlen = buf->len;
const guint maxlen = fcon->content_remaining + fcon->padding_remaining;
if (0 == maxlen) return TRUE;
g_byte_array_set_size(buf, curlen + maxlen);
res = read(fcon->fd, buf->data + curlen, maxlen);
if (res == -1) {
tmp_errno = errno;
g_byte_array_set_size(buf, curlen);
errno = tmp_errno;
return FALSE;
} else if (res == 0) {
g_byte_array_set_size(buf, curlen);
errno = ECONNRESET;
return FALSE;
} else {
/* remove padding data */
if (res > fcon->content_remaining) {
fcon->padding_remaining -= res - fcon->content_remaining;
res = fcon->content_remaining;
}
g_byte_array_set_size(buf, curlen + res);
fcon->content_remaining -= res;
return TRUE;
}
}
static gboolean read_key_value(fastcgi_connection *fcon, GByteArray *buf, guint *pos, gchar **key, guint *keylen, gchar **value, guint *valuelen) {
const unsigned char *data = (const unsigned char*) buf->data;
guint32 klen, vlen;
guint p = *pos, len = buf->len;
if (len - p < 2) return FALSE;
klen = data[p++];
if (klen & 0x80) {
if (len - p < 100) return FALSE;
klen = ((klen & 0x7f) << 24) | (data[p] << 16) | (data[p+1] << 8) | data[p+2];
p += 3;
}
vlen = data[p++];
if (vlen & 0x80) {
if (len - p < 100) return FALSE;
vlen = ((vlen & 0x7f) << 24) | (data[p] << 16) | (data[p+1] << 8) | data[p+2];
p += 3;
}
if (klen > FASTCGI_MAX_KEYLEN || vlen > FASTCGI_MAX_VALUELEN) {
fastcgi_connection_close(fcon);
return FALSE;
}
if (len - p < klen + vlen) return FALSE;
*key = (gchar*) &buf->data[p];
*keylen = klen;
p += klen;
*value = (gchar*) &buf->data[p];
*valuelen = vlen;
p += vlen;
*pos = p;
return TRUE;
}
static void parse_params(const fastcgi_callbacks *fcbs, fastcgi_connection *fcon) {
if (!fcon->current_header.contentLength) {
fcbs->cb_new_request(fcon);
g_byte_array_set_size(fcon->parambuf, 0);
} else {
guint pos = 0, keylen = 0, valuelen = 0;
gchar *key = NULL, *value = NULL;
while (read_key_value(fcon, fcon->parambuf, &pos, &key, &keylen, &value, &valuelen)) {
gchar *envvar = g_malloc(keylen + valuelen + 2);
memcpy(envvar, key, keylen);
envvar[keylen] = '=';
memcpy(envvar + keylen + 1, value, valuelen);
envvar[keylen+valuelen+1] = '\0';
g_ptr_array_add(fcon->environ, envvar);
}
if (!fcon->closing)
g_byte_array_remove_range(fcon->parambuf, 0, pos);
}
}
static void parse_get_values(fastcgi_connection *fcon) {
/* just send the request back and don't insert results */
GByteArray *tmp = g_byte_array_sized_new(0);
stream_send_bytearray(&fcon->write_queue, FCGI_GET_VALUES_RESULT, 0, fcon->buffer);
*fcon->buffer = *tmp;
/* TODO: provide get-values result */
}
static void read_queue(fastcgi_connection *fcon) {
gssize res;
GByteArray *buf;
const fastcgi_callbacks *fcbs = fcon->fsrv->callbacks;
for (;;) {
if (fcon->closing || fcon->read_suspended) return;
if (fcon->headerbuf_used < 8) {
const unsigned char *data = fcon->headerbuf;
res = read(fcon->fd, fcon->headerbuf + fcon->headerbuf_used, 8 - fcon->headerbuf_used);
if (0 == res) { errno = ECONNRESET; goto handle_error; }
if (-1 == res) goto handle_error;
fcon->headerbuf_used += res;
if (fcon->headerbuf_used < 8) return; /* need more data */
fcon->current_header.version = data[0];
fcon->current_header.type = data[1];
fcon->current_header.requestID = (data[2] << 8) | (data[3]);
fcon->current_header.contentLength = (data[4] << 8) | (data[5]);
fcon->current_header.paddingLength = data[6];
fcon->content_remaining = fcon->current_header.contentLength;
fcon->padding_remaining = fcon->current_header.paddingLength;
fcon->first = TRUE;
g_byte_array_set_size(fcon->buffer, 0);
if (fcon->current_header.version != FCGI_VERSION_1) {
fastcgi_connection_close(fcon);
return;
}
}
if (fcon->current_header.type != FCGI_BEGIN_REQUEST &&
(0 != fcon->current_header.requestID) && fcon->current_header.requestID != fcon->requestID) {
/* ignore packet data */
if (0 != fcon->content_remaining + fcon->padding_remaining) {
if (NULL == (buf = read_content(fcon))) goto handle_error;
g_byte_array_free(buf, TRUE);
}
if (0 == fcon->content_remaining + fcon->padding_remaining) {
fcon->headerbuf_used = 0;
}
continue;
}
if (fcon->first || fcon->content_remaining) {
fcon->first = FALSE;
switch (fcon->current_header.type) {
case FCGI_BEGIN_REQUEST:
if (8 != fcon->current_header.contentLength || 0 == fcon->current_header.requestID) goto error;
if (!read_append_chunk(fcon, fcon->buffer)) goto handle_error;
if (0 == fcon->content_remaining) {
if (fcon->requestID) {
stream_send_end_request(&fcon->write_queue, fcon->current_header.requestID, 0, FCGI_CANT_MPX_CONN);
} else {
unsigned char *data = (unsigned char*) fcon->buffer->data;
fcon->requestID = fcon->current_header.requestID;
fcon->role = (data[0] << 8) | (data[1]);
fcon->flags = data[2];
g_byte_array_set_size(fcon->parambuf, 0);
}
}
break;
case FCGI_ABORT_REQUEST:
if (0 != fcon->current_header.contentLength || 0 == fcon->current_header.requestID) goto error;
fcbs->cb_request_aborted(fcon);
break;
case FCGI_END_REQUEST:
goto error; /* invalid type */
case FCGI_PARAMS:
if (0 == fcon->current_header.requestID) goto error;
if (!read_append_chunk(fcon, fcon->parambuf)) goto handle_error;
parse_params(fcbs, fcon);
break;
case FCGI_STDIN:
if (0 == fcon->current_header.requestID) goto error;
buf = NULL;
if (0 != fcon->content_remaining &&
NULL == (buf = read_content(fcon))) goto handle_error;
if (fcbs->cb_received_stdin) {
fcbs->cb_received_stdin(fcon, buf);
} else {
g_byte_array_free(buf, TRUE);
}
break;
case FCGI_STDOUT:
goto error; /* invalid type */
case FCGI_STDERR:
goto error; /* invalid type */
case FCGI_DATA:
if (0 == fcon->current_header.requestID) goto error;
buf = NULL;
if (0 != fcon->content_remaining &&
NULL == (buf = read_content(fcon))) goto handle_error;
if (fcbs->cb_received_data) {
fcbs->cb_received_data(fcon, buf);
} else {
g_byte_array_free(buf, TRUE);
}
break;
case FCGI_GET_VALUES:
if (0 != fcon->current_header.requestID) goto error;
if (!read_append_chunk(fcon, fcon->buffer)) goto handle_error;
if (0 == fcon->content_remaining)
parse_get_values(fcon);
break;
case FCGI_GET_VALUES_RESULT:
goto error; /* invalid type */
break;
case FCGI_UNKNOWN_TYPE:
/* we didn't send anything fancy, so this is not expected */
goto error; /* invalid type */
default:
break;
}
}
if (0 == fcon->content_remaining) {
if (0 == fcon->padding_remaining) {
fcon->headerbuf_used = 0;
} else {
if (NULL == (buf = read_chunk(fcon, fcon->padding_remaining))) goto handle_error;
fcon->padding_remaining -= buf->len;
if (0 == fcon->padding_remaining) {
fcon->headerbuf_used = 0;
}
g_byte_array_free(buf, TRUE);
}
}
}
return;
handle_error:
switch (errno) {
case EINTR:
case EAGAIN:
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
return; /* try again later */
case ECONNRESET:
break;
default:
ERROR("read from fd=%d failed, %s\n", fcon->fd, g_strerror(errno) );
break;
}
error:
if (0 != fcon->requestID)
fcbs->cb_request_aborted(fcon);
fastcgi_connection_close(fcon);
}
static void fastcgi_connection_fd_cb(struct ev_loop *loop, ev_io *w, int revents) {
fastcgi_connection *fcon = (fastcgi_connection*) w->data;
UNUSED(loop);
if (revents & EV_READ) {
read_queue(fcon);
}
if (revents & EV_WRITE) {
write_queue(fcon);
}
}
static fastcgi_connection *fastcgi_connecion_create(fastcgi_server *fsrv, gint fd, guint id) {
fastcgi_connection *fcon = g_slice_new0(fastcgi_connection);
fcon->fsrv = fsrv;
fcon->fcon_id = id;
fcon->buffer = g_byte_array_sized_new(0);
fcon->parambuf = g_byte_array_sized_new(0);
fcon->environ = g_ptr_array_new();
fcon->fd = fd;
fd_init(fcon->fd);
ev_io_init(&fcon->fd_watcher, fastcgi_connection_fd_cb, fcon->fd, EV_READ);
fcon->fd_watcher.data = fcon;
ev_io_start(fcon->fsrv->loop, &fcon->fd_watcher);
return fcon;
}
static void fastcgi_connection_free(fastcgi_connection *fcon) {
fcon->fsrv->callbacks->cb_reset_connection(fcon);
if (fcon->fd != -1) {
ev_io_stop(fcon->fsrv->loop, &fcon->fd_watcher);
close(fcon->fd);
fcon->fd = -1;
}
fastcgi_queue_clear(&fcon->write_queue);
fastcgi_connection_environ_clear(fcon);
g_ptr_array_free(fcon->environ, TRUE);
g_byte_array_free(fcon->buffer, TRUE);
g_byte_array_free(fcon->parambuf, TRUE);
g_slice_free(fastcgi_connection, fcon);
}
void fastcgi_connection_close(fastcgi_connection *fcon) {
fcon->closing = TRUE;
if (fcon->fd != -1) {
ev_io_stop(fcon->fsrv->loop, &fcon->fd_watcher);
close(fcon->fd);
fcon->fd = -1;
}
fastcgi_queue_clear(&fcon->write_queue);
g_byte_array_set_size(fcon->buffer, 0);
g_byte_array_set_size(fcon->parambuf, 0);
fastcgi_connection_environ_clear(fcon);
ev_prepare_start(fcon->fsrv->loop, &fcon->fsrv->closing_watcher);
}
static void fastcgi_server_fd_cb(struct ev_loop *loop, ev_io *w, int revents) {
fastcgi_server *fsrv = (fastcgi_server*) w->data;
fastcgi_connection *fcon;
void (*cb_new_connection)(fastcgi_connection *fcon) = fsrv->callbacks->cb_new_connection;
g_assert(revents & EV_READ);
for (;;) {
gint fd = accept(fsrv->fd, NULL, NULL);
if (-1 == fd) {
switch (errno) {
case EAGAIN:
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
case EINTR:
/* we were stopped _before_ we had a connection */
case ECONNABORTED: /* this is a FreeBSD thingy */
/* we were stopped _after_ we had a connection */
return;
case EMFILE:
fsrv->max_connections = fsrv->connections->len / 2;
if (fsrv->max_connections < 1) fsrv->max_connections = 1;
ERROR("dropped connection limit to %u as we got EMFILE\n", fsrv->max_connections);
ev_io_rem_events(loop, w, EV_READ);
return;
default:
ERROR("accept failed on fd=%d with error: %s\nshutting down\n", fsrv->fd, g_strerror(errno));
fastcgi_server_stop(fsrv);
return;
}
}
fcon = fastcgi_connecion_create(fsrv, fd, fsrv->connections->len);
g_ptr_array_add(fsrv->connections, fcon);
if (cb_new_connection) {
cb_new_connection(fcon);
}
if (fsrv->connections->len >= fsrv->max_connections) {
ev_io_rem_events(loop, w, EV_READ);
return;
}
if (fsrv->do_shutdown) return;
}
}
static void fastcgi_cleanup_connections(fastcgi_server *fsrv) {
guint i;
gboolean closed_con;
for (i = 0; i < fsrv->connections->len; ) {
fastcgi_connection *fcon = g_ptr_array_index(fsrv->connections, i);
if (fcon->closing) {
fastcgi_connection *t_fcon;
guint l = fsrv->connections->len-1;
t_fcon = g_ptr_array_index(fsrv->connections, i) = g_ptr_array_index(fsrv->connections, l);
g_ptr_array_set_size(fsrv->connections, l);
t_fcon->fcon_id = i;
fastcgi_connection_free(fcon);
closed_con = TRUE;
} else {
i++;
}
}
if (closed_con && fsrv->connections->len < fsrv->max_connections) {
ev_io_add_events(fsrv->loop, &fsrv->fd_watcher, EV_READ);
}
}
static void fastcgi_closing_cb(struct ev_loop *loop, ev_prepare *w, int revents) {
UNUSED(revents);
ev_prepare_stop(loop, w);
fastcgi_cleanup_connections((fastcgi_server*) w->data);
}
fastcgi_server *fastcgi_server_create(struct ev_loop *loop, gint socketfd, const fastcgi_callbacks *callbacks, guint max_connections) {
fastcgi_server *fsrv = g_slice_new0(fastcgi_server);
fsrv->callbacks = callbacks;
fsrv->max_connections = max_connections;
fsrv->connections = g_ptr_array_sized_new(fsrv->max_connections);
fsrv->loop = loop;
fsrv->fd = socketfd;
fd_init(fsrv->fd);
ev_io_init(&fsrv->fd_watcher, fastcgi_server_fd_cb, fsrv->fd, EV_READ);
fsrv->fd_watcher.data = fsrv;
ev_io_start(fsrv->loop, &fsrv->fd_watcher);
ev_prepare_init(&fsrv->closing_watcher, fastcgi_closing_cb);
fsrv->closing_watcher.data = fsrv;
return fsrv;
}
void fastcgi_server_stop(fastcgi_server *fsrv) {
if (fsrv->do_shutdown) return;
fsrv->do_shutdown = TRUE;
ev_io_stop(fsrv->loop, &fsrv->fd_watcher);
close(fsrv->fd);
fsrv->fd = -1;
}
void fastcgi_server_free(fastcgi_server *fsrv) {
guint i;
void (*cb_request_aborted)(fastcgi_connection *fcon) = fsrv->callbacks->cb_request_aborted;
if (!fsrv->do_shutdown) fastcgi_server_stop(fsrv);
ev_prepare_stop(fsrv->loop, &fsrv->closing_watcher);
for (i = 0; i < fsrv->connections->len; i++) {
fastcgi_connection *fcon = g_ptr_array_index(fsrv->connections, i);
cb_request_aborted(fcon);
fcon->closing = TRUE;
}
fastcgi_cleanup_connections(fsrv);
g_ptr_array_free(fsrv->connections, TRUE);
g_slice_free(fastcgi_server, fsrv);
}
void fastcgi_end_request(fastcgi_connection *fcon, gint32 appStatus, enum FCGI_ProtocolStatus status) {
gboolean had_data = (fcon->write_queue.length > 0);
if (0 == fcon->requestID) return;
stream_send_end_request(&fcon->write_queue, fcon->requestID, appStatus, status);
fcon->requestID = 0;
if (!had_data) write_queue(fcon);
}
void fastcgi_suspend_read(fastcgi_connection *fcon) {
fcon->read_suspended = TRUE;
ev_io_rem_events(fcon->fsrv->loop, &fcon->fd_watcher, EV_READ);
}
void fastcgi_resume_read(fastcgi_connection *fcon) {
fcon->read_suspended = FALSE;
ev_io_add_events(fcon->fsrv->loop, &fcon->fd_watcher, EV_READ);
}
void fastcgi_send_out(fastcgi_connection *fcon, GString *data) {
gboolean had_data = (fcon->write_queue.length > 0);
if (!data) {
stream_send_fcgi_record(&fcon->write_queue, FCGI_STDOUT, fcon->requestID, 0);
} else {
stream_send_string(&fcon->write_queue, FCGI_STDOUT, fcon->requestID, data);
}
if (!had_data) write_queue(fcon);
}
void fastcgi_send_err(fastcgi_connection *fcon, GString *data) {
gboolean had_data = (fcon->write_queue.length > 0);
if (!data) {
stream_send_fcgi_record(&fcon->write_queue, FCGI_STDERR, fcon->requestID, 0);
} else {
stream_send_string(&fcon->write_queue, FCGI_STDERR, fcon->requestID, data);
}
if (!had_data) write_queue(fcon);
}
void fastcgi_send_out_bytearray(fastcgi_connection *fcon, GByteArray *data) {
gboolean had_data = (fcon->write_queue.length > 0);
if (!data) {
stream_send_fcgi_record(&fcon->write_queue, FCGI_STDOUT, fcon->requestID, 0);
} else {
stream_send_bytearray(&fcon->write_queue, FCGI_STDOUT, fcon->requestID, data);
}
if (!had_data) write_queue(fcon);
}
void fastcgi_send_err_bytearray(fastcgi_connection *fcon, GByteArray *data) {
gboolean had_data = (fcon->write_queue.length > 0);
if (!data) {
stream_send_fcgi_record(&fcon->write_queue, FCGI_STDERR, fcon->requestID, 0);
} else {
stream_send_bytearray(&fcon->write_queue, FCGI_STDERR, fcon->requestID, data);
}
if (!had_data) write_queue(fcon);
}
void fastcgi_connection_environ_clear(fastcgi_connection *fcon) {
guint i;
for (i = 0; i < fcon->environ->len; i++) {
gchar *s = (gchar*) g_ptr_array_index(fcon->environ, i);
if (s) g_free(s);
}
g_ptr_array_set_size(fcon->environ, 0);
}
const gchar* fastcgi_connection_environ_lookup(fastcgi_connection *fcon, const gchar* key, gsize keylen) {
guint i;
for (i = 0; i < fcon->environ->len; i++) {
gchar *s = (gchar*) g_ptr_array_index(fcon->environ, i);
if (s && 0 == strncmp(s, key, keylen) && s[keylen] == '=') {
return &s[keylen+1];
}
}
return NULL;
}