/*
 *  Copyright 1999-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/***************************************************************************
 * Description: NSAPI plugin for Netscape servers                          *
 * Author:      Gal Shachor <shachor@il.ibm.com>                           *
 * Version:     $Revision$                                           *
 ***************************************************************************/


#include "jk_global.h"
#include "jk_util.h"
#include "jk_map.h"
#include "jk_pool.h"
#include "jk_service.h"
#include "jk_worker.h"

#include "nsapi.h"

#define URI_PATTERN "path"
#define DEFAULT_WORKER_NAME ("ajp13")

struct nsapi_private_data {
    jk_pool_t p;
    
    int request_started;

    pblock *pb;
    Session *sn;
    Request *rq;
};
typedef struct nsapi_private_data nsapi_private_data_t;

static int init_on_other_thread_is_done = JK_FALSE;
static int init_on_other_thread_is_ok = JK_FALSE;

static jk_logger_t *logger = NULL;
static jk_worker_env_t	 worker_env;

#ifdef NETWARE
int (*PR_IsSocketSecure)(SYS_NETFD *csd); /* pointer to PR_IsSocketSecure function */
#endif

static int JK_METHOD start_response(jk_ws_service_t *s,
                                    int status,
                                    const char *reason,
                                    const char * const *header_names,
                                    const char * const *header_values,
                                    unsigned num_of_headers);

static int JK_METHOD ws_read(jk_ws_service_t *s,
                             void *b,
                             unsigned l,
                             unsigned *a);

static int JK_METHOD ws_write(jk_ws_service_t *s,
                              const void *b,
                              unsigned l);

NSAPI_PUBLIC int jk_init(pblock *pb, 
                         Session *sn, 
                         Request *rq);

NSAPI_PUBLIC void jk_term(void *p);

NSAPI_PUBLIC int jk_service(pblock *pb,
                            Session *sn,
                            Request *rq);

static int init_ws_service(nsapi_private_data_t *private_data,
                           jk_ws_service_t *s);

static int setup_http_headers(nsapi_private_data_t *private_data,
                              jk_ws_service_t *s);

static void init_workers_on_other_threads(void *init_d) 
{
    jk_map_t *init_map = (jk_map_t *)init_d;
    /* we add the URI->WORKER MAP since workers using AJP14 will feed it */
	/* but where are they here in Netscape ? */
    if(wc_open(init_map, &worker_env, logger)) {
        init_on_other_thread_is_ok = JK_TRUE;
    } else {
        jk_log(logger, JK_LOG_EMERG, "In init_workers_on_other_threads, failed\n");
    }

    init_on_other_thread_is_done = JK_TRUE;
}

static int JK_METHOD start_response(jk_ws_service_t *s,
                                    int status,
                                    const char *reason,
                                    const char * const *header_names,
                                    const char * const *header_values,
                                    unsigned num_of_headers)
{
    if(s && s->ws_private) {
        nsapi_private_data_t *p = s->ws_private;
        if(!p->request_started) {
            unsigned i;

            p->request_started = JK_TRUE;

            /* Remove "old" content type */
            param_free(pblock_remove("content-type", p->rq->srvhdrs));

            if(num_of_headers) {
                for (i = 0 ; i < (int)num_of_headers ; i++) {
                    pblock_nvinsert(header_names[i],
                                    header_values[i],
                                    p->rq->srvhdrs);    
                }
            } else {
                pblock_nvinsert("content-type",
                                "text/plain",
                                p->rq->srvhdrs);    
            }

            protocol_status(p->sn,
                            p->rq,
                            status,
                            (char *)reason);

            protocol_start_response(p->sn, p->rq);
        }
        return JK_TRUE;

    }
    return JK_FALSE;
}

static int JK_METHOD ws_read(jk_ws_service_t *s,
                             void *b,
                             unsigned l,
                             unsigned *a)
{
    if(s && s->ws_private && b && a) {
        nsapi_private_data_t *p = s->ws_private;
        
        *a = 0;
        if(l) {
            char *buf = b;
            unsigned i;
            netbuf *inbuf = p->sn->inbuf;

/* Until we get a service pack for NW5.1 and earlier that has the latest */
/* Enterprise Server, we have to go through the else version of this code*/
#if defined(netbuf_getbytes) && !defined(NETWARE) 
            i = netbuf_getbytes(inbuf, b, l);
            if(NETBUF_EOF == i || NETBUF_ERROR == i) {
                return JK_FALSE;
            }

#else 
            int ch;
            for(i = 0 ; i < l ; i++) {
                ch = netbuf_getc(inbuf);           
                /*
                 * IO_EOF is 0 (zero) which is a very reasonable byte
                 * when it comes to binary data. So we are not breaking 
                 * out of the read loop when reading it.
                 *
                 * We are protected from an infinit loop by the Java part of
                 * Tomcat.
                 */
                if(IO_ERROR == ch) {
                    break;
                }

                buf[i] = ch;
            }

            if(0 == i) {
                return JK_FALSE;
            }
#endif
            *a = i;

        }
        return JK_TRUE;
    }
    return JK_FALSE;
}

static int JK_METHOD ws_write(jk_ws_service_t *s,
                              const void *b,
                              unsigned l)
{
    if(s && s->ws_private && b) {
        nsapi_private_data_t *p = s->ws_private;

        if(l) {
            if(!p->request_started) {
                start_response(s, 200, NULL, NULL, NULL, 0);
            }

            if(net_write(p->sn->csd, (char *)b, (int)l) == IO_ERROR) {
                return JK_FALSE;
            }
        }

        return JK_TRUE;

    }
    return JK_FALSE;
}

NSAPI_PUBLIC int jk_init(pblock *pb, 
                         Session *sn, 
                         Request *rq)
{
    char *worker_prp_file = pblock_findval(JK_WORKER_FILE_TAG, pb); 
    char *log_level_str = pblock_findval(JK_LOG_LEVEL_TAG, pb); 
    char *log_file = pblock_findval(JK_LOG_FILE_TAG, pb); 

    int rc = REQ_ABORTED;
    jk_map_t *init_map;

    fprintf(stderr, "In jk_init.\n   Worker file = %s.\n   Log level = %s.\n   Log File = %s\n",worker_prp_file, log_level_str,  log_file);
    if(!worker_prp_file) {
        worker_prp_file = JK_WORKER_FILE_DEF;
    }

    if(!log_level_str) {
        log_level_str = JK_LOG_LEVEL_DEF;
    }    
    
    if(!jk_open_file_logger(&logger, log_file, 
                            jk_parse_log_level(log_level_str))) {
        logger = NULL;
    }

    if(map_alloc(&init_map)) {
        if(map_read_properties(init_map, worker_prp_file)) {
            int sleep_cnt;
            SYS_THREAD s;
            
            s = systhread_start(SYSTHREAD_DEFAULT_PRIORITY, 
                                0, 
                                init_workers_on_other_threads, 
                                init_map);
            for(sleep_cnt = 0 ; sleep_cnt < 60 ; sleep_cnt++) {
                systhread_sleep(1000);
                jk_log(logger, JK_LOG_DEBUG, "jk_init, a second passed\n");
                if(init_on_other_thread_is_done) {
                    break;
                }
            }

            if(init_on_other_thread_is_done &&
               init_on_other_thread_is_ok) {
                magnus_atrestart(jk_term, NULL);
                rc = REQ_PROCEED;
            }

/*            if(wc_open(init_map, NULL, logger)) {
                magnus_atrestart(jk_term, NULL);
                rc = REQ_PROCEED;
            }
*/
        }
        
        map_free(&init_map);
    }

#ifdef NETWARE
    PR_IsSocketSecure = (int (*)(void **))ImportSymbol(GetNLMHandle(), "PR_IsSocketSecure");
#endif
    return rc;    
}

NSAPI_PUBLIC void jk_term(void *p)
{
#ifdef NETWARE
    if (NULL != PR_IsSocketSecure)
    {
       UnimportSymbol(GetNLMHandle(), "PR_IsSocketSecure");
       PR_IsSocketSecure = NULL;
    }
#endif
    wc_close(logger);
    if(logger) {
        jk_close_file_logger(&logger);
    }
}

NSAPI_PUBLIC int jk_service(pblock *pb,
                            Session *sn,
                            Request *rq)
{
    char *worker_name = pblock_findval(JK_WORKER_NAME_TAG, pb); 
    char *uri_pattern = pblock_findval(URI_PATTERN, pb);     
    jk_worker_t *worker;    
    int rc = REQ_ABORTED;

    if(uri_pattern) {
        char *uri = pblock_findval("uri", rq->reqpb);

        if(0 != shexp_match(uri, uri_pattern)) {
            return REQ_NOACTION;
        }        
    }

    if(!worker_name) {
        worker_name = DEFAULT_WORKER_NAME;
    }

    worker = wc_get_worker_for_name(worker_name, logger);
    if(worker) {
        nsapi_private_data_t private_data;
        jk_ws_service_t s;
        jk_pool_atom_t buf[SMALL_POOL_SIZE];

        jk_open_pool(&private_data.p, buf, sizeof(buf));

        private_data.request_started = JK_FALSE;
        private_data.pb = pb;
        private_data.sn = sn;
        private_data.rq = rq;

        jk_init_ws_service(&s);

        s.ws_private = &private_data;
        s.pool = &private_data.p;

        if(init_ws_service(&private_data, &s)) {
            jk_endpoint_t *e = NULL;
            if(worker->get_endpoint(worker, &e, logger)) {                
                int recover = JK_FALSE;
                if(e->service(e, &s, logger, &recover)) {
                    rc = REQ_PROCEED;
                }
                e->done(&e, logger);
            }
        }
        jk_close_pool(&private_data.p);
    }

    return rc;
}

static int init_ws_service(nsapi_private_data_t *private_data,
                           jk_ws_service_t *s) 
{
    char *tmp;
    int rc;

    s->jvm_route = NULL;
    s->start_response = start_response;
    s->read = ws_read;
    s->write = ws_write;
    
    /* Clear RECO status */
    s->reco_status  = RECO_NONE;

    s->auth_type        = pblock_findval("auth-type", private_data->rq->vars);
    s->remote_user      = pblock_findval("auth-user", private_data->rq->vars);

    s->content_length   = 0;
    tmp = NULL;
    rc  = request_header("content-length", 
                         &tmp, 
                         private_data->sn, 
                         private_data->rq);

    if((rc != REQ_ABORTED) && tmp) {
        s->content_length = atoi(tmp);
    }
    
    s->method           = pblock_findval("method", private_data->rq->reqpb);
    s->protocol         = pblock_findval("protocol", private_data->rq->reqpb);
    
    s->remote_host      = session_dns(private_data->sn);
    s->remote_addr      = pblock_findval("ip", private_data->sn->client);
    
    s->req_uri          = pblock_findval("uri", private_data->rq->reqpb);
    s->query_string     = pblock_findval("query", private_data->rq->reqpb);

    s->server_name      = server_hostname;
    
#ifdef NETWARE
    /* On NetWare, since we have virtual servers, we have a different way of
     * getting the port that we need to try first.
     */
    tmp = pblock_findval("server_port", private_data->sn->client);
    if (NULL != tmp)
        s->server_port = atoi(tmp);
    else
#endif
    s->server_port      = server_portnum;
    s->server_software  = system_version();


    s->headers_names    = NULL;
    s->headers_values   = NULL;
    s->num_headers      = 0;
    
#ifdef NETWARE
    /* on NetWare, we can have virtual servers that are secure.  
     * PR_IsSocketSecure is an api made available with virtual servers to check
     * if the socket is secure or not
     */
    if (NULL != PR_IsSocketSecure)
        s->is_ssl       = PR_IsSocketSecure(private_data->sn->csd);
    else
#endif
    s->is_ssl           = security_active;

    s->ssl_key_size     = -1; /* required by Servlet 2.3 Api, added in jtc */
    if(s->is_ssl) {
        s->ssl_cert     = pblock_findval("auth-cert", private_data->rq->vars);
        if(s->ssl_cert) {
            s->ssl_cert_len = strlen(s->ssl_cert);
        }
        s->ssl_cipher   = pblock_findval("cipher", private_data->sn->client);
        s->ssl_session  = pblock_findval("ssl-id", private_data->sn->client);
    } else {
        s->ssl_cert     = NULL;
        s->ssl_cert_len = 0;
        s->ssl_cipher   = NULL;
        s->ssl_session  = NULL;
    }

    return setup_http_headers(private_data, s);
}

static int setup_http_headers(nsapi_private_data_t *private_data,
                              jk_ws_service_t *s) 
{
    int need_content_length_header = (s->content_length == 0) ? JK_TRUE : JK_FALSE; 

    pblock *headers_jar = private_data->rq->headers;
    int cnt;
    int i;

    for(i = 0, cnt = 0 ; i < headers_jar->hsize ; i++) {
        struct pb_entry *h = headers_jar->ht[i];
        while(h && h->param) {
            cnt++;
            h = h->next;
        }
    }

    s->headers_names  = NULL;
    s->headers_values = NULL;
    s->num_headers = cnt;
    if(cnt) {
        /* allocate an extra header slot in case we need to add a content-length header */
        s->headers_names  = jk_pool_alloc(&private_data->p, (cnt + 1) * sizeof(char *));
        s->headers_values = jk_pool_alloc(&private_data->p, (cnt + 1) * sizeof(char *));

        if(s->headers_names && s->headers_values) {            
            for(i = 0, cnt = 0 ; i < headers_jar->hsize ; i++) {
                struct pb_entry *h = headers_jar->ht[i];
                while(h && h->param) {
                    s->headers_names[cnt]  = h->param->name;
                    s->headers_values[cnt] = h->param->value;
                    if(need_content_length_header &&
                            !strncmp(h->param->name,"content-length",14)) {
                        need_content_length_header = JK_FALSE;
                    }
                    cnt++;
                    h = h->next;
                }
            }
            /* Add a content-length = 0 header if needed. 
             * Ajp13 assumes an absent content-length header means an unknown, 
             * but non-zero length body. 
             */ 
            if(need_content_length_header) {
                s->headers_names[cnt] = "content-length"; 
                s->headers_values[cnt] = "0"; 
                cnt++;
            }
            s->num_headers = cnt;
            return JK_TRUE;
        }
    } else {
        if (need_content_length_header) {
            s->headers_names  = jk_pool_alloc(&private_data->p, sizeof(char *));
            s->headers_values = jk_pool_alloc(&private_data->p, sizeof(char *));
            if(s->headers_names && s->headers_values) {
                s->headers_names[0] = "content-length"; 
                s->headers_values[0] = "0"; 
                s->num_headers++;
                return JK_TRUE;
            }
        }
        else
            return JK_TRUE;
    }

    return JK_FALSE;
}