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request.c
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request.c
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/*
* Copyright (C) 2004-2008 Christos Tsantilas
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA.
*/
#include "common.h"
#include "c-icap.h"
#include "debug.h"
#include "request.h"
#include "request_util.h"
#include "service.h"
#include "access.h"
#include "acl.h"
#include "util.h"
#include "cfg_param.h"
#include "stats.h"
#include "body.h"
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include <assert.h>
extern int TIMEOUT;
extern int KEEPALIVE_TIMEOUT;
extern const char *DEFAULT_SERVICE;
extern int PIPELINING;
extern int CHECK_FOR_BUGGY_CLIENT;
extern int ALLOW204_AS_200OK_ZERO_ENCAPS;
extern int FAKE_ALLOW204;
/*This variable defined in mpm_server.c and become 1 when the child must
halt imediatelly:*/
extern int CHILD_HALT;
#define FORBITTEN_STR "ICAP/1.0 403 Forbidden\r\n\r\n"
#define ci_method_supported(METHOD, METHOD_DEF) (METHOD & METHOD_DEF)
static ci_thread_mutex_t STAT_MTX;
static ci_stat_memblock_t *STATS = NULL;
static int STAT_REQUESTS = -1;
static int STAT_FAILED_REQUESTS = -1;
static int STAT_BYTES_IN = -1;
static int STAT_BYTES_OUT = -1;
static int STAT_HTTP_BYTES_IN = -1;
static int STAT_HTTP_BYTES_OUT = -1;
static int STAT_BODY_BYTES_IN = -1;
static int STAT_BODY_BYTES_OUT = -1;
static int STAT_REQMODS = -1;
static int STAT_RESPMODS = -1;
static int STAT_OPTIONS = -1;
static int STAT_ALLOW204 = -1;
static int STAT_ALLOW206 = -1;
static int STAT_TIME_PER_REQUESTS = -1;
static int STAT_PROC_TIME_PER_REQUESTS = -1;
static struct timestats {
time_t indx;
uint64_t accumulated_time;
uint64_t accumulated_proc_time;
int requests;
} STAT_TIME = {0, 0, 0};
static int request_stat_entry_register(const char *name, int type, const char *gname)
{
int stat = ci_stat_entry_register(name, type, gname);
assert(stat >= 0);
return stat;
}
void request_stats_init()
{
STAT_REQUESTS = request_stat_entry_register("REQUESTS", CI_STAT_INT64_T, "General");
STAT_REQMODS = request_stat_entry_register("REQMODS", CI_STAT_INT64_T, "General");
STAT_RESPMODS = request_stat_entry_register("RESPMODS", CI_STAT_INT64_T, "General");
STAT_OPTIONS = request_stat_entry_register("OPTIONS", CI_STAT_INT64_T, "General");
STAT_FAILED_REQUESTS = request_stat_entry_register("FAILED REQUESTS", CI_STAT_INT64_T, "General");
STAT_ALLOW204 = request_stat_entry_register("ALLOW 204", CI_STAT_INT64_T, "General");
STAT_ALLOW206 = request_stat_entry_register("ALLOW 206", CI_STAT_INT64_T, "General");
STAT_TIME_PER_REQUESTS = request_stat_entry_register("TIME PER REQUEST", CI_STAT_TIME_US_T, "General");
STAT_PROC_TIME_PER_REQUESTS = request_stat_entry_register("PROCESSING TIME PER REQUEST", CI_STAT_TIME_US_T, "General");
STAT_BYTES_IN = request_stat_entry_register("BYTES IN", CI_STAT_KBS_T, "General");
STAT_BYTES_OUT = request_stat_entry_register("BYTES OUT", CI_STAT_KBS_T, "General");
STAT_HTTP_BYTES_IN = request_stat_entry_register("HTTP BYTES IN", CI_STAT_KBS_T, "General");
STAT_HTTP_BYTES_OUT = request_stat_entry_register("HTTP BYTES OUT", CI_STAT_KBS_T, "General");
STAT_BODY_BYTES_IN = request_stat_entry_register("BODY BYTES IN", CI_STAT_KBS_T, "General");
STAT_BODY_BYTES_OUT = request_stat_entry_register("BODY BYTES OUT", CI_STAT_KBS_T, "General");
/*
Use a threads mutex lock to update request statistics. They are updated
only in one place in this file (function do_request), so this is should
work well.
*/
ci_thread_mutex_init(&STAT_MTX);
}
static int wait_for_data(ci_connection_t *conn, int secs, int what_wait)
{
int wait_status;
/*if we are going down do not wait....*/
if (CHILD_HALT)
return -1;
do {
wait_status = ci_connection_wait(conn, secs, what_wait);
if (wait_status < 0)
return -1;
if (wait_status == 0 && CHILD_HALT) /*abort*/
return -1;
} while (wait_status & ci_wait_should_retry);
if (wait_status == 0) /* timeout */
return -1;
return wait_status;
}
ci_request_t *server_request_alloc()
{
ci_connection_t *conn;
conn = (ci_connection_t *) calloc(1, sizeof(ci_connection_t));
assert(conn);
return ci_request_alloc(conn);
}
int server_request_use_connection(ci_request_t * req, ci_connection_t * connection, int protocol)
{
int access;
int len;
ci_request_reset(req);
ci_copy_connection(req->connection, connection);
if ((access = access_check_client(req)) == CI_ACCESS_DENY) { /*Check for client access */
len = strlen(FORBITTEN_STR);
ci_clock_time_get(&req->start_w_t);
ci_connection_write(connection, FORBITTEN_STR, len, TIMEOUT);
ci_clock_time_get(&req->stop_w_t);
return 0; /*Or something that means authentication error */
}
req->access_type = access;
req->protocol = protocol;
return 1;
}
int keepalive_request(ci_request_t *req)
{
/* Preserve extra read bytes*/
char *pstrblock = req->pstrblock_read;
int pstrblock_len = req->pstrblock_read_len;
/*Preserve protocol:*/
int protocol = req->protocol;
ci_request_reset(req);
req->protocol = protocol;
if (PIPELINING) {
req->pstrblock_read = pstrblock;
req->pstrblock_read_len = pstrblock_len;
}
if (req->pstrblock_read && req->pstrblock_read_len > 0)
return 1;
return wait_for_data(req->connection, KEEPALIVE_TIMEOUT, ci_wait_for_read);
}
/*Here we want to read in small blocks icap header becouse in most cases
it will not bigger than 512-1024 bytes.
So we are going to do small reads and small increments in icap headers size,
to save some space and keep small the number of over-read bytes
*/
#define ICAP_HEADER_READSIZE 512
/*this function check if there is enough space in buffer buf ....*/
static int icap_header_check_realloc(char **buf, int *size, int used, int mustadded)
{
char *newbuf;
int len;
if (*size - used < mustadded) {
len = *size + ICAP_HEADER_READSIZE;
newbuf = realloc(*buf, len);
if (!newbuf) {
return EC_500;
}
*buf = newbuf;
*size = *size + ICAP_HEADER_READSIZE;
}
return EC_100;
}
int ci_read_icap_header(ci_request_t * req, ci_headers_list_t * h, int timeout)
{
int bytes, request_status = EC_100, i, eoh = 0, startsearch = 0, readed = 0;
int wait_status = 0;
char *buf_end;
int dataPrefetch = 0;
buf_end = h->buf;
readed = 0;
bytes = 0;
if (PIPELINING && req->pstrblock_read && req->pstrblock_read_len > 0) {
if ((request_status =
icap_header_check_realloc(&(h->buf), &(h->bufsize), req->pstrblock_read_len,
ICAP_HEADER_READSIZE)) != EC_100)
return request_status;
memmove(h->buf, req->pstrblock_read, req->pstrblock_read_len);
readed = req->pstrblock_read_len;
buf_end = h->buf;
bytes = readed;
dataPrefetch = 1;
req->pstrblock_read = NULL;
req->pstrblock_read_len = 0;
ci_debug_printf(5, "Get data from previous request read.\n");
}
do {
if (!dataPrefetch) {
if ((wait_status = wait_for_data(req->connection, timeout, ci_wait_for_read)) < 0)
return EC_408;
bytes = ci_connection_read_nonblock(req->connection, buf_end, ICAP_HEADER_READSIZE);
if (bytes < 0)
return EC_408;
if (bytes == 0) /*NOP? should retry?*/
continue;
readed += bytes;
req->bytes_in += bytes;
} else
dataPrefetch = 0;
for (i = startsearch; i < bytes - 3; i++) { /*search for end of header.... */
if (strncmp(buf_end + i, "\r\n\r\n", 4) == 0) {
buf_end = buf_end + i + 2;
eoh = 1;
break;
}
}
if (eoh)
break;
if ((request_status =
icap_header_check_realloc(&(h->buf), &(h->bufsize), readed,
ICAP_HEADER_READSIZE)) != EC_100)
break;
buf_end = h->buf + readed;
if (startsearch > -3)
startsearch = (readed > 3 ? -3 : -readed); /*Including the last 3 char ellements ....... */
} while (1);
h->bufused = buf_end - h->buf; /* -1 ; */
req->pstrblock_read = buf_end + 2; /*after the \r\n\r\n. We keep the first \r\n and the other dropped.... */
req->pstrblock_read_len = readed - h->bufused - 2; /*the 2 of the 4 characters \r\n\r\n and the '\0' character */
req->request_bytes_in = h->bufused + 2; /*This is include the "\r\n\r\n" sequence*/
return request_status;
}
static int read_encaps_header(ci_request_t * req, ci_headers_list_t * h, int size)
{
int bytes = 0, remains, readed = 0;
char *buf_end = NULL;
if (!ci_headers_setsize(h, size + (CHECK_FOR_BUGGY_CLIENT != 0 ? 2 : 0)))
return EC_500;
buf_end = h->buf;
if (req->pstrblock_read_len > 0) {
readed =
(size > req->pstrblock_read_len ? req->pstrblock_read_len : size);
memcpy(h->buf, req->pstrblock_read, readed);
buf_end = h->buf + readed;
if (size <= req->pstrblock_read_len) { /*We have readed all this header....... */
req->pstrblock_read = (req->pstrblock_read) + readed;
req->pstrblock_read_len = (req->pstrblock_read_len) - readed;
} else {
req->pstrblock_read = NULL;
req->pstrblock_read_len = 0;
}
}
remains = size - readed;
while (remains > 0) {
if (wait_for_data(req->connection, TIMEOUT, ci_wait_for_read) < 0)
return CI_ERROR;
if ((bytes = ci_connection_read_nonblock(req->connection, buf_end, remains)) < 0)
return CI_ERROR;
remains -= bytes;
buf_end += bytes;
req->bytes_in += bytes;
}
h->bufused = buf_end - h->buf; // -1 ;
if (strncmp(buf_end - 4, "\r\n\r\n", 4) == 0) {
h->bufused -= 2; /*eat the last 2 bytes of "\r\n\r\n" */
} else if (CHECK_FOR_BUGGY_CLIENT && strncmp(buf_end - 2, "\r\n", 2) != 0) {
// Some icap clients missing the "\r\n\r\n" after end of headers
// when null-body is present.
*buf_end = '\r';
*(buf_end + 1) = '\n';
h->bufused += 2;
}
/*Currently we are counting only successfull http headers read.*/
req->http_bytes_in += size;
req->request_bytes_in += size;
return EC_100;
}
static int get_method(char *buf, char **end)
{
if (!strncmp(buf, "OPTIONS", 7)) {
*end = buf + 7;
return ICAP_OPTIONS;
} else if (!strncmp(buf, "REQMOD", 6)) {
*end = buf + 6;
return ICAP_REQMOD;
} else if (!strncmp(buf, "RESPMOD", 7)) {
*end = buf + 7;
return ICAP_RESPMOD;
} else {
*end = buf;
return -1;
}
}
static int parse_request(ci_request_t * req, char *buf)
{
char *start, *end;
int servnamelen, len, args_len;
int vmajor, vminor;
ci_service_module_t *service = NULL;
service_alias_t *salias = NULL;
if ((req->type = get_method(buf, &end)) < 0)
return EC_400;
while (*end == ' ') end++;
start = end;
if (strncasecmp(start, "icap://", 7) == 0)
start = start + 7;
else if (strncasecmp(start, "icaps://", 8) == 0)
start = start + 8;
else
return EC_400;
len = strcspn(start, "/ ");
end = start + len;
servnamelen =
(CI_MAXHOSTNAMELEN > len ? len : CI_MAXHOSTNAMELEN);
memcpy(req->req_server, start, servnamelen);
req->req_server[servnamelen] = '\0';
if (*end == '/') { /*we are expecting service name*/
start = ++end;
while (*end && *end != ' ' && *end != '?')
end++;
len = end - start;
len =
(len < MAX_SERVICE_NAME ? len : MAX_SERVICE_NAME);
if (len) {
strncpy(req->service, start, len);
req->service[len] = '\0';
}
if (*end == '?') { /*args */
start = ++end;
if ((end = strchr(start, ' ')) != NULL) {
args_len = strlen(req->args);
len = end - start;
if (args_len && len) {
req->args[args_len] = '&';
args_len++;
}
len = (len < (MAX_SERVICE_ARGS - args_len) ?
len : (MAX_SERVICE_ARGS - args_len));
strncpy(req->args + args_len, start, len);
req->args[args_len + len] = '\0';
} else
return EC_400;
} /*end of parsing args */
}
while (*end == ' ')
end++;
start = end;
vminor = vmajor = -1;
if (strncmp(start, "ICAP/", 5) == 0) {
start += 5;
vmajor = strtol(start, &end, 10);
if (vmajor > 0 && *end == '.') {
start = end + 1;
vminor = strtol(start, &end, 10);
if (end == start) /*no chars parsed*/
vminor = -1;
}
}
if (vminor == -1 || vmajor < 1)
return EC_400;
if (req->service[0] == '\0' && DEFAULT_SERVICE) { /*No service name defined*/
strncpy(req->service, DEFAULT_SERVICE, MAX_SERVICE_NAME);
}
if (req->service[0] != '\0') {
if (!(service = find_service(req->service))) { /*else search for an alias */
if ((salias = find_service_alias(req->service))) {
service = salias->service;
if (salias->args[0] != '\0') {
strncpy(req->args, salias->args, MAX_SERVICE_ARGS);
req->args[MAX_SERVICE_ARGS] = '\0';
}
}
}
}
req->current_service_mod = service;
if (!req->current_service_mod)
return EC_404; /*Service not found*/
if (!ci_method_supported(req->current_service_mod->mod_type, req->type)
&& req->type != ICAP_OPTIONS) {
return EC_405; /* Method not allowed for service. */
}
return EC_100;
}
static int check_request(ci_request_t *req)
{
/*Check encapsulated header*/
if (req->entities[0] == NULL && req->type != ICAP_OPTIONS) /*No encapsulated header*/
return EC_400;
ci_debug_printf(6, "\n type:%d Entities: %d %d %d %d \n",
req->type,
req->entities[0] ? req->entities[0]->type : -1,
req->entities[1] ? req->entities[1]->type : -1,
req->entities[2] ? req->entities[2]->type : -1,
req->entities[3] ? req->entities[3]->type : -1
);
if (req->type == ICAP_REQMOD) {
if (req->entities[2] != NULL)
return EC_400;
else if (req->entities[1] != NULL) {
if (req->entities[0]->type != ICAP_REQ_HDR)
return EC_400;
if (req->entities[1]->type != ICAP_REQ_BODY && req->entities[1]->type != ICAP_NULL_BODY)
return EC_400;
} else {
/*If it has only one encapsulated object it must be body data*/
if (req->entities[0]->type != ICAP_REQ_BODY)
return EC_400;
}
} else if (req->type == ICAP_RESPMOD) {
if (req->entities[3] != NULL)
return EC_400;
else if (req->entities[2] != NULL) {
assert(req->entities[0]);
assert(req->entities[1]);
if (req->entities[0]->type != ICAP_REQ_HDR)
return EC_400;
if (req->entities[1]->type != ICAP_RES_HDR)
return EC_400;
if (req->entities[2]->type != ICAP_RES_BODY && req->entities[2]->type != ICAP_NULL_BODY)
return EC_400;
} else if (req->entities[1] != NULL) {
if (req->entities[0]->type != ICAP_RES_HDR && req->entities[0]->type != ICAP_REQ_HDR)
return EC_400;
if (req->entities[1]->type != ICAP_RES_BODY && req->entities[1]->type != ICAP_NULL_BODY)
return EC_400;
} else {
/*If it has only one encapsulated object it must be body data*/
if (req->entities[0]->type != ICAP_RES_BODY)
return EC_400;
}
}
return EC_100;
}
static int parse_header(ci_request_t * req)
{
int i, request_status = EC_100, result;
ci_headers_list_t *h;
char *val;
h = req->request_header;
if ((request_status = ci_read_icap_header(req, h, TIMEOUT)) != EC_100)
return request_status;
if ((request_status = ci_headers_unpack(h)) != EC_100)
return request_status;
if ((request_status = parse_request(req, h->headers[0])) != EC_100)
return request_status;
for (i = 1; i < h->used && request_status == EC_100; i++) {
if (strncasecmp("Preview:", h->headers[i], 8) == 0) {
val = h->headers[i] + 8;
for (; isspace((int)*val) && *val != '\0'; ++val);
errno = 0;
result = strtol(val, NULL, 10);
if (errno != EINVAL && errno != ERANGE) {
req->preview = result;
if (result >= 0)
ci_buf_reset_and_resize(&(req->preview_data), result + 64);
}
} else if (strncasecmp("Encapsulated:", h->headers[i], 13) == 0)
request_status = process_encapsulated(req, h->headers[i]);
else if (strncasecmp("Connection:", h->headers[i], 11) == 0) {
val = h->headers[i] + 11;
for (; isspace((int)*val) && *val != '\0'; ++val);
/* if(strncasecmp(val,"keep-alive",10)==0)*/
if (strncasecmp(val, "close", 5) == 0)
req->keepalive = 0;
/*else the default behaviour of keepalive ..... */
} else if (strncasecmp("Allow:", h->headers[i], 6) == 0) {
if (strstr(h->headers[i]+6, "204"))
req->allow204 = 1;
if (strstr(h->headers[i]+6, "206"))
req->allow206 = 1;
}
}
if (request_status != EC_100)
return request_status;
return check_request(req);
}
static int parse_encaps_headers(ci_request_t * req)
{
int size, i, request_status = 0;
ci_encaps_entity_t *e = NULL;
for (i = 0; (e = req->entities[i]) != NULL; i++) {
if (e->type > ICAP_RES_HDR) //res_body,req_body or opt_body so the end of the headers.....process_encapsulated
return EC_100;
if (req->entities[i + 1] == NULL)
return EC_400;
size = req->entities[i + 1]->start - e->start;
if ((request_status =
read_encaps_header(req, (ci_headers_list_t *) e->entity,
size)) != EC_100)
return request_status;
if ((request_status =
ci_headers_unpack((ci_headers_list_t *) e->entity)) != EC_100)
return request_status;
}
return EC_100;
}
/*
In read_preview_data I must check if readed data are more than
those client said in preview header
*/
static int read_preview_data(ci_request_t * req)
{
int ret;
char *wdata;
req->current_chunk_len = 0;
req->chunk_bytes_read = 0;
req->write_to_module_pending = 0;
if (req->pstrblock_read_len == 0) {
if (wait_for_data(req->connection, TIMEOUT, ci_wait_for_read) < 0)
return CI_ERROR;
if (net_data_read(req) == CI_ERROR)
return CI_ERROR;
}
do {
do {
if ((ret = parse_chunk_data(req, &wdata)) == CI_ERROR) {
ci_debug_printf(1,
"Error parsing chunks, current chunk len: %d readed:%d, str:%s\n",
req->current_chunk_len,
req->chunk_bytes_read, req->pstrblock_read);
return CI_ERROR;
}
if (ci_buf_write
(&(req->preview_data), wdata,
req->write_to_module_pending) < 0)
return CI_ERROR;
req->write_to_module_pending = 0;
if (ret == CI_EOF) {
req->pstrblock_read = NULL;
req->pstrblock_read_len = 0;
if (req->eof_received)
return CI_EOF;
return CI_OK;
}
} while (ret != CI_NEEDS_MORE);
if (wait_for_data(req->connection, TIMEOUT, ci_wait_for_read) < 0)
return CI_ERROR;
if (net_data_read(req) == CI_ERROR)
return CI_ERROR;
} while (1);
return CI_ERROR;
}
static void ec_responce_simple(ci_request_t * req, int ec)
{
char buf[256];
int len;
snprintf(buf, sizeof(buf), "ICAP/1.0 %d %s\r\n\r\n",
ci_status_code(ec), ci_status_code_string(ec));
len = strlen(buf);
ci_clock_time_get(&req->start_w_t);
ci_connection_write(req->connection, buf, len, TIMEOUT);
ci_clock_time_get(&req->stop_w_t);
req->bytes_out += len;
req->return_code = ec;
}
static int ec_responce(ci_request_t * req, int ec)
{
char buf[256];
ci_service_xdata_t *srv_xdata = NULL;
int len, allow204to200OK = 0;
if (req->current_service_mod)
srv_xdata = service_data(req->current_service_mod);
ci_headers_reset(req->response_header);
if (ec == EC_204 && ALLOW204_AS_200OK_ZERO_ENCAPS) {
allow204to200OK = 1;
ec = EC_200;
}
snprintf(buf, sizeof(buf), "ICAP/1.0 %d %s",
ci_status_code(ec), ci_status_code_string(ec));
ci_headers_add(req->response_header, buf);
ci_headers_add(req->response_header, "Server: C-ICAP/" VERSION);
if (req->keepalive)
ci_headers_add(req->response_header, "Connection: keep-alive");
else
ci_headers_add(req->response_header, "Connection: close");
if (srv_xdata) {
ci_service_data_read_lock(srv_xdata);
ci_headers_add(req->response_header, srv_xdata->ISTag);
ci_service_data_read_unlock(srv_xdata);
}
if (!ci_headers_is_empty(req->xheaders)) {
ci_headers_addheaders(req->response_header, req->xheaders);
}
if (allow204to200OK) {
if (req->type == ICAP_REQMOD)
ci_headers_add(req->response_header, "Encapsulated: req-hdr=0, null-body=0");
else
ci_headers_add(req->response_header, "Encapsulated: res-hdr=0, null-body=0");
}
/*
TODO: Release req->entities (ci_request_release_entity())
*/
ci_headers_pack(req->response_header);
req->return_code = ec;
ci_clock_time_get(&req->start_w_t);
len = ci_connection_write(req->connection,
req->response_header->buf, req->response_header->bufused,
TIMEOUT);
ci_clock_time_get(&req->stop_w_t);
/*We are finishing sending*/
req->status = SEND_EOF;
if (len < 0)
return -1;
req->bytes_out += len;
return len;
}
extern char MY_HOSTNAME[];
static int mk_responce_header(ci_request_t * req)
{
ci_headers_list_t *head;
ci_encaps_entity_t **e_list;
ci_service_xdata_t *srv_xdata;
char buf[512];
srv_xdata = service_data(req->current_service_mod);
ci_headers_reset(req->response_header);
head = req->response_header;
assert(req->return_code >= EC_100 && req->return_code < EC_MAX);
snprintf(buf, sizeof(buf), "ICAP/1.0 %d %s",
ci_status_code(req->return_code), ci_status_code_string(req->return_code));
ci_headers_add(head, buf);
ci_headers_add(head, "Server: C-ICAP/" VERSION);
if (req->keepalive)
ci_headers_add(head, "Connection: keep-alive");
else
ci_headers_add(head, "Connection: close");
ci_service_data_read_lock(srv_xdata);
ci_headers_add(head, srv_xdata->ISTag);
ci_service_data_read_unlock(srv_xdata);
if (!ci_headers_is_empty(req->xheaders)) {
ci_headers_addheaders(head, req->xheaders);
}
e_list = req->entities;
if (req->type == ICAP_RESPMOD) {
if (e_list[0]->type == ICAP_REQ_HDR) {
ci_request_release_entity(req, 0);
e_list[0] = e_list[1];
e_list[1] = e_list[2];
e_list[2] = NULL;
}
}
snprintf(buf, sizeof(buf), "Via: ICAP/1.0 %s (C-ICAP/" VERSION " %s )",
MY_HOSTNAME,
(req->current_service_mod->mod_short_descr ? req->
current_service_mod->mod_short_descr : req->current_service_mod->
mod_name));
/*Here we must append it to an existsing Via header not just add a new header */
if (req->type == ICAP_RESPMOD) {
ci_http_response_add_header(req, buf);
} else if (req->type == ICAP_REQMOD) {
ci_http_request_add_header(req, buf);
}
ci_response_pack(req);
return 1;
}
/****************************************************************/
/* New functions to send responce */
const char *eol_str = "\r\n";
const char *eof_str = "0\r\n\r\n";
static int send_current_block_data(ci_request_t * req)
{
int bytes;
if (req->remain_send_block_bytes == 0)
return 0;
if ((bytes =
ci_connection_write_nonblock(req->connection, req->pstrblock_responce,
req->remain_send_block_bytes)) < 0) {
ci_debug_printf(5, "Error writing to socket (errno:%d, bytes:%d. string:\"%s\")", errno, req->remain_send_block_bytes, req->pstrblock_responce);
return CI_ERROR;
}
ci_clock_time_get(&req->stop_w_t);
/*
if (bytes == 0) {
ci_debug_printf(5, "Can not write to the client. Is the connection closed?");
return CI_ERROR;
}
*/
req->pstrblock_responce += bytes;
req->remain_send_block_bytes -= bytes;
req->bytes_out += bytes;
if (req->status >= SEND_HEAD1 && req->status <= SEND_HEAD3)
req->http_bytes_out +=bytes;
return req->remain_send_block_bytes;
}
static int format_body_chunk(ci_request_t * req)
{
int def_bytes;
char *wbuf = NULL;
char tmpbuf[EXTRA_CHUNK_SIZE];
static const size_t REQ_WBUF_SIZE = sizeof(((ci_request_t *)0)->wbuf);
if (!req->responce_hasbody)
return CI_EOF;
if (req->remain_send_block_bytes > 0) {
assert(req->remain_send_block_bytes <= MAX_CHUNK_SIZE);
/*The data are not written yet but I hope there is not any problem.
It is difficult to compute data sent */
req->http_bytes_out += req->remain_send_block_bytes;
req->body_bytes_out += req->remain_send_block_bytes;
wbuf = req->wbuf + EXTRA_CHUNK_SIZE + req->remain_send_block_bytes;
/*Put the "\r\n" sequence at the end of chunk */
*(wbuf++) = '\r';
*wbuf = '\n';
def_bytes =
snprintf(tmpbuf, sizeof(tmpbuf), "%x\r\n",
req->remain_send_block_bytes);
assert(def_bytes < EXTRA_CHUNK_SIZE);
wbuf = req->wbuf + EXTRA_CHUNK_SIZE - def_bytes; /*Copy the chunk define in the beggining of chunk ..... */
memcpy(wbuf, tmpbuf, def_bytes);
req->pstrblock_responce = wbuf;
req->remain_send_block_bytes += def_bytes + 2;
} else if (req->remain_send_block_bytes == CI_EOF) {
if (req->return_code == EC_206 && req->i206_use_original_body >= 0) {
def_bytes = snprintf(req->wbuf, REQ_WBUF_SIZE,
"0; use-original-body=%" PRId64 "\r\n\r\n",
req->i206_use_original_body );
req->pstrblock_responce = req->wbuf;
req->remain_send_block_bytes = def_bytes;
} else {
def_bytes = snprintf(req->wbuf, REQ_WBUF_SIZE, "0\r\n\r\n");
req->pstrblock_responce = req->wbuf;
req->remain_send_block_bytes = def_bytes;
}
return CI_EOF;
}
return CI_OK;
}
static int resp_check_body(ci_request_t * req)
{
int i;
ci_encaps_entity_t **e = req->entities;
for (i = 0; e[i] != NULL; i++)
if (e[i]->type == ICAP_NULL_BODY)
return 0;
return 1;
}
/*
The
if((ret=send_current_block_data(req))!=0)
return ret;
must called after this function....
*/
static int update_send_status(ci_request_t * req)
{
int i, status;
ci_encaps_entity_t *e;
if (req->status == SEND_NOTHING) { //If nothing has send start sending....
if (!mk_responce_header(req)) {
ci_debug_printf(1, "Error constructing the responce headers!\n");
return CI_ERROR;
}
req->responce_hasbody = resp_check_body(req);
req->pstrblock_responce = req->response_header->buf;
req->remain_send_block_bytes = req->response_header->bufused;
req->status = SEND_RESPHEAD;
ci_clock_time_get(&req->start_w_t);
ci_debug_printf(9, "Going to send response headers\n");
return CI_OK;
}
if (req->status == SEND_EOF) {
ci_debug_printf(9, "The req->status is EOF (remain to send bytes:%d)\n",
req->remain_send_block_bytes);
if (req->remain_send_block_bytes == 0)
return CI_EOF;
else
return CI_OK;
}
if (req->status == SEND_BODY) {
ci_debug_printf(9, "Send status is SEND_BODY return\n");
return CI_OK;
}
if ((status = req->status) < SEND_HEAD3) {
status++;
}
if (status > SEND_RESPHEAD && status < SEND_BODY) { /*status is SEND_HEAD1 SEND_HEAD2 or SEND_HEAD3 */
i = status - SEND_HEAD1; /*We have to send next headers block .... */
if ((e = req->entities[i]) != NULL
&& (e->type == ICAP_REQ_HDR || e->type == ICAP_RES_HDR)) {
req->pstrblock_responce = ((ci_headers_list_t *) e->entity)->buf;
req->remain_send_block_bytes =
((ci_headers_list_t *) e->entity)->bufused;
req->status = status;
ci_debug_printf(9, "Going to send http headers on entity :%d\n", i);
return CI_OK;
} else if (req->responce_hasbody) { /*end of headers, going to send body now.A body always follows the res_hdr or req_hdr..... */
req->status = SEND_BODY;
return CI_OK;
} else {
req->status = SEND_EOF;
req->pstrblock_responce = (char *) NULL;
req->remain_send_block_bytes = 0;
return CI_EOF;
}
}
return CI_ERROR; /*Can not be reached (I thing)...... */
}
static int mod_null_io(char *rbuf, int *rlen, char *wbuf, int *wlen, int iseof,
ci_request_t *req)
{
if (iseof)
*rlen = CI_EOF;
else
*rlen = 0;
return CI_OK;
}
static int mod_echo_io(char *wbuf, int *wlen, char *rbuf, int *rlen, int iseof,
ci_request_t *req)
{
if (!req->echo_body)
return CI_ERROR;
if (rlen && rbuf) {
*rlen = ci_ring_buf_write(req->echo_body, rbuf, *rlen);
if (*rlen < 0)
return CI_ERROR;
}
if (wbuf && wlen) {
*wlen = ci_ring_buf_read(req->echo_body, wbuf, *wlen);
if (*wlen == 0 && req->eof_received)
*wlen = CI_EOF;
}
return CI_OK;
}
static int get_send_body(ci_request_t * req, int parse_only)
{
char *wchunkdata = NULL, *rchunkdata = NULL;
int parse_chunk_ret, has_formated_data = 0;
int (*service_io) (char *rbuf, int *rlen, char *wbuf, int *wlen, int iseof,
ci_request_t *);
int action = 0, rchunk_has_space = 0, service_eof = 0, wbytes, rbytes;
int lock_status;
int no_io;
if (parse_only)
service_io = mod_null_io;
else if (req->echo_body)
service_io = mod_echo_io;
else
service_io = req->current_service_mod->mod_service_io;
if (!service_io)
return CI_ERROR;
req->status = SEND_NOTHING;
/*in the case we did not have preview data and body is small maybe
the c-icap already read the body with the headers so do not read
if there are unparsed bytes in pstrblock buffer
*/
if (req->pstrblock_read_len == 0)
action = ci_wait_for_read;
do {
if (action) {
int ret;
ci_debug_printf(9, "Going to %s/%s data\n",
(action & ci_wait_for_read ? "Read" : "-"),
(action & ci_wait_for_write ? "Write" : "-")
);
if ((ret =
wait_for_data(req->connection, TIMEOUT,
action)) < 0)
break;
if (ret & ci_wait_for_read) {
if (net_data_read(req) == CI_ERROR)
return CI_ERROR;
}
if (ret & ci_wait_for_write) {
if (!req->data_locked && req->status == SEND_NOTHING) {
update_send_status(req);
}
if (send_current_block_data(req) == CI_ERROR)
return CI_ERROR;
}
ci_debug_printf(9,
"OK done reading/writing going to process\n");
}