connectors/jk/native2/server/apache13/jk_service_apache13.c

/*
 *  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: Apache1.3 adapter 
 */

#include "httpd.h"
#include "http_config.h"
#include "http_request.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_main.h"
#include "http_log.h"

#include "util_script.h"
#include "util_date.h"
/*
 * Jakarta (jk_) include files
 */
#include "jk_global.h"
#include "jk_map.h"
#include "jk_pool.h"
#include "jk_env.h"
#include "jk_service.h"
#include "jk_worker.h"
#include "jk_workerEnv.h"
#include "jk_uriMap.h"
#include "jk_requtil.h"


#define NULL_FOR_EMPTY(x)   ((x && !strlen(x)) ? NULL : x)

static int JK_METHOD jk2_service_apache13_head(jk_env_t *env,
                                               jk_ws_service_t *s)
{
    int h;
    int numheaders;
    request_rec *r;
    jk_map_t *headers;

    if (s == NULL || s->ws_private == NULL)
        return JK_ERR;

    r = (request_rec *) s->ws_private;

    if (s->msg == NULL) {
        s->msg = "";
    }
    r->status = s->status;
    r->status_line = ap_psprintf(r->pool, "%d %s", s->status, s->msg);

    headers = s->headers_out;
    numheaders = headers->size(env, headers);
    /* XXX As soon as we switch to jk_map_apache13, this will not be needed ! */
    if (s->uriEnv->mbean->debug > 0)
        env->l->jkLog(env, env->l, JK_LOG_INFO,
                      "service.head() %d %d\n", s->status, numheaders);

    for (h = 0; h < numheaders; h++) {
        char *name = headers->nameAt(env, headers, h);
        char *val = headers->valueAt(env, headers, h);

        if (s->uriEnv->mbean->debug > 0)
            env->l->jkLog(env, env->l, JK_LOG_INFO,
                          "service.head() %s: %s %d %d\n",
                          name, val, h, headers->size(env, headers));

        /* the cmp can also be avoided in we do this earlier and use
           the header id */
        if (strcasecmp(name, "Content-type") == 0) {
            /* XXX should be done in handler ! */
            char *tmp = ap_pstrdup(r->pool, val);
            ap_content_type_tolower(tmp);
            r->content_type = tmp;
            ap_table_set(r->headers_out, name, val);
        }
        else if (strcasecmp(name, "Location") == 0) {
            /* XXX setn */
            ap_table_set(r->headers_out, name, val);
        }
        else if (strcasecmp(name, "Content-Length") == 0) {
            ap_table_set(r->headers_out, name, val);
        }
        else if (strcasecmp(name, "Transfer-Encoding") == 0) {
            ap_table_set(r->headers_out, name, val);
        }
        else if (strcasecmp(name, "Last-Modified") == 0) {
            /*
             * If the script gave us a Last-Modified header, we can't just
             * pass it on blindly because of restrictions on future values.
             */
            ap_update_mtime(r, ap_parseHTTPdate(val));
            ap_set_last_modified(r);
            ap_table_set(r->headers_out, name, val);
        }
        else {
            ap_table_add(r->headers_out, name, val);
            /* ap_table_set(r->headers_out, name, val); */
        }
    }

    ap_send_http_header(r);
    s->response_started = JK_TRUE;

    return JK_OK;
}

/*
 * Read a chunk of the request body into a buffer.  Attempt to read len
 * bytes into the buffer.  Write the number of bytes actually read into
 * actually_read.
 *
 * Think of this function as a method of the apache1.3-specific subclass of
 * the jk_ws_service class.  Think of the *s param as a "this" or "self"
 * pointer.
 */
static int JK_METHOD jk2_service_apache13_read(jk_env_t *env,
                                               jk_ws_service_t *s, void *b,
                                               unsigned len,
                                               unsigned *actually_read)
{
    long rv;

    if (s == NULL || s->ws_private == NULL || b == NULL
        || actually_read == NULL) {
        return JK_ERR;
    }

    if (!s->read_body_started) {
        if (ap_should_client_block(s->ws_private)) {
            s->read_body_started = JK_TRUE;
        }
    }
    rv = ap_get_client_block(s->ws_private, b, len);

    if (rv < 0) {
        *actually_read = 0;
    }
    else {
        *actually_read = (unsigned)rv;
    }
    return JK_OK;
}

/*
 * Write a chunk of response data back to the browser.  If the headers
 * haven't yet been sent over, send over default header values (Status =
 * 200, basically).
 *
 * Write len bytes from buffer b.
 *
 * Think of this function as a method of the apache1.3-specific subclass of
 * the jk_ws_service class.  Think of the *s param as a "this" or "self"
 * pointer.
 */

/* Works with 4096, fails with 8192 */
#ifndef CHUNK_SIZE
#define CHUNK_SIZE 4096
#endif

static int JK_METHOD jk2_service_apache13_write(jk_env_t *env,
                                                jk_ws_service_t *s,
                                                const void *b,
                                                unsigned int len)
{
    int rc;

    if (s == NULL || s->ws_private == NULL || b == NULL)
        return JK_ERR;

    {
        size_t rd = 0;
        long ll = len;
        char *bb = (char *)b;
        request_rec *rr = s->ws_private;
        BUFF *bf = rr->connection->client;

        if (!s->response_started) {
            if (s->uriEnv->mbean->debug > 0)
                env->l->jkLog(env, env->l, JK_LOG_INFO,
                              "service.write() default head\n");

            rc = s->head(env, s);
            if (rc != JK_OK) {
                return rc;
            }
        }
        if (rr->header_only) {
            ap_bflush(bf);
            return JK_OK;
        }

        /* Debug - try to get around rwrite */
        while (ll > 0) {
            unsigned long toSend = (ll > CHUNK_SIZE) ? CHUNK_SIZE : ll;
            rd = ap_rwrite((const char *)bb, toSend, rr);
            if (s->uriEnv->mbean->debug > 0)
                env->l->jkLog(env, env->l, JK_LOG_INFO,
                              "service.write()  %ld (%ld) out of %ld \n",
                              toSend, rd, ll);
            ll -= CHUNK_SIZE;
            bb += CHUNK_SIZE;

            if (toSend != rd) {
                return JK_ERR;
            }

        }

        /*
         * To allow server push. After writing full buffers
         */
        ap_bflush(bf);
    }
    return JK_OK;
}

/* ========================================================================= */
/* Utility functions                                                         */
/* ========================================================================= */

static int jk2_get_content_length(jk_env_t *env, request_rec * r)
{
    if (r->clength > 0) {
        return r->clength;
    }
    else {
        char *lenp = (char *)ap_table_get(r->headers_in, "Content-Length");

        if (lenp) {
            int rc = atoi(lenp);
            if (rc > 0) {
                return rc;
            }
        }
    }

    return 0;
}

static int JK_METHOD jk2_init_ws_service(jk_env_t *env, jk_ws_service_t *s,
                                         jk_worker_t *worker, void *serverObj)
{
    char *ssl_temp = NULL;
    jk_workerEnv_t *workerEnv = worker->workerEnv;
    request_rec *r = serverObj;
    int need_content_length_header = JK_FALSE;

    /* Common initialization */
    /* XXX Probably not needed, we're duplicating */
    jk2_requtil_initRequest(env, s);

    s->ws_private = r;
    s->response_started = JK_FALSE;
    s->read_body_started = JK_FALSE;
    s->workerEnv = workerEnv;

    workerEnv->childId = r->connection->child_num;

    s->jvm_route = NULL;        /* Used for sticky session routing */

    s->auth_type = NULL_FOR_EMPTY(r->connection->ap_auth_type);
    s->remote_user = NULL_FOR_EMPTY(r->connection->user);

    s->protocol = r->protocol;
    s->remote_host = (char *)ap_get_remote_host(r->connection,
                                                r->per_dir_config,
                                                REMOTE_HOST);
    s->remote_host = NULL_FOR_EMPTY(s->remote_host);
    s->remote_addr = NULL_FOR_EMPTY(r->connection->remote_ip);

    /* get server name */
    s->server_name = (char *)(r->hostname ? r->hostname :
                              r->server->server_hostname);
    s->server_port = htons(r->connection->local_addr.sin_port);
    s->server_software = (char *)ap_get_server_version();

    s->method = (char *)r->method;
    s->content_length = jk2_get_content_length(env, r);
    s->is_chunked = r->read_chunked;
    s->no_more_chunks = 0;
    s->query_string = r->args;

    /*
     * The 2.2 servlet spec errata says the uri from
     * HttpServletRequest.getRequestURI() should remain encoded.
     * [http://java.sun.com/products/servlet/errata_042700.html]
     *
     * We use JkOptions to determine which method to be used
     *
     * ap_escape_uri is the latest recommanded but require
     *               some java decoding (in TC 3.3 rc2)
     *
     * unparsed_uri is used for strict compliance with spec and
     *              old Tomcat (3.2.3 for example)
     *
     * uri is use for compatibilty with mod_rewrite with old Tomcats
     */

    switch (workerEnv->options & JK_OPT_FWDURIMASK) {

    case JK_OPT_FWDURICOMPATUNPARSED:
        s->req_uri = r->unparsed_uri;
        if (s->req_uri != NULL) {
            char *query_str = strchr(s->req_uri, '?');
            if (query_str != NULL) {
                *query_str = 0;
            }
        }

        break;

    case JK_OPT_FWDURICOMPAT:
        s->req_uri = r->uri;
        break;

    case JK_OPT_FWDURIESCAPED:
        s->req_uri = ap_escape_uri(r->pool, r->uri);
        break;

    default:
        return JK_ERR;
    }

    s->is_ssl = JK_FALSE;
    s->ssl_cert = NULL;
    s->ssl_cert_len = 0;
    s->ssl_cipher = NULL;       /* required by Servlet 2.3 Api, 
                                   allready in original ajp13 */
    s->ssl_session = NULL;
    s->ssl_key_size = -1;       /* required by Servlet 2.3 Api, added in jtc */

    if (workerEnv->ssl_enable || workerEnv->envvars_in_use) {
        ap_add_common_vars(r);

        if (workerEnv->ssl_enable) {
            ssl_temp =
                (char *)ap_table_get(r->subprocess_env,
                                     workerEnv->https_indicator);
            if (ssl_temp && !strcasecmp(ssl_temp, "on")) {
                s->is_ssl = JK_TRUE;
                s->ssl_cert =
                    (char *)ap_table_get(r->subprocess_env,
                                         workerEnv->certs_indicator);
                if (s->ssl_cert) {
                    s->ssl_cert_len = strlen(s->ssl_cert);
                }
                /* Servlet 2.3 API */
                s->ssl_cipher =
                    (char *)ap_table_get(r->subprocess_env,
                                         workerEnv->cipher_indicator);
                s->ssl_session =
                    (char *)ap_table_get(r->subprocess_env,
                                         workerEnv->session_indicator);

                if (workerEnv->options & JK_OPT_FWDKEYSIZE) {
                    /* Servlet 2.3 API */
                    ssl_temp = (char *)ap_table_get(r->subprocess_env,
                                                    workerEnv->
                                                    key_size_indicator);
                    if (ssl_temp)
                        s->ssl_key_size = atoi(ssl_temp);
                }
            }
        }

        jk2_map_default_create(env, &s->attributes, s->pool);

        if (workerEnv->envvars_in_use) {
            int envCnt = workerEnv->envvars->size(env, workerEnv->envvars);
            int i;

            for (i = 0; i < envCnt; i++) {
                char *name =
                    workerEnv->envvars->nameAt(env, workerEnv->envvars, i);
                char *val = (char *)ap_table_get(r->subprocess_env, name);
                if (val == NULL) {
                    val =
                        workerEnv->envvars->valueAt(env, workerEnv->envvars,
                                                    i);
                }
                s->attributes->put(env, s->attributes, name, val, NULL);
            }
        }
    }

    jk2_map_default_create(env, &s->headers_in, s->pool);

    if (r->headers_in && ap_table_elts(r->headers_in)) {
        const array_header *t = ap_table_elts(r->headers_in);
        if (t && t->nelts) {
            int i;

            table_entry *elts = (table_entry *) t->elts;

            for (i = 0; i < t->nelts; i++) {
                s->headers_in->add(env, s->headers_in,
                                   elts[i].key, elts[i].val);
            }
        }
    }

    if (!s->is_chunked && s->content_length == 0) {
        /* XXX if r->contentLength == 0 I assume there's no header
           or a header with '0'. In the second case, put will override it 
         */
        s->headers_in->put(env, s->headers_in, "content-length", "0", NULL);
    }

    jk2_map_default_create(env, &s->headers_out, s->pool);

    return JK_OK;
}

/*
 * If the servlet engine didn't consume all of the
 * request data, consume and discard all further
 * characters left to read from client
 *
 *  XXX Is it the right thing to do ????? Why spend the
 *  bandwith, the servlet decided not to read the POST then
 *  jk shouldn't do it instead, and the user should get the
 *  error message !
 */
static void JK_METHOD jk2_service_apache13_afterRequest(jk_env_t *env,
                                                        jk_ws_service_t *s)
{

    if (s->content_read < s->content_length ||
        (s->is_chunked && !s->no_more_chunks)) {

        request_rec *r = s->ws_private;

        char *buff = ap_palloc(r->pool, 2048);
        if (buff != NULL) {
            int rd;
            while ((rd = ap_get_client_block(r, buff, 2048)) > 0) {
                s->content_read += rd;
            }
        }
    }
}

int jk2_service_apache13_init(jk_env_t *env, jk_ws_service_t *s)
{
    if (s == NULL) {
        return JK_ERR;
    }

    s->head = jk2_service_apache13_head;
    s->read = jk2_service_apache13_read;
    s->write = jk2_service_apache13_write;
    s->init = jk2_init_ws_service;
    s->afterRequest = jk2_service_apache13_afterRequest;

    return JK_OK;
}