jk_service_apache13.c

Tomcat 4.1与WebServer集成组件的源代码包.

/* ========================================================================= *
 *                                                                           *
 *                 The Apache Software License,  Version 1.1                 *
 *                                                                           *
 *          Copyright (c) 1999-2002 The Apache Software Foundation.          *
 *                           All rights reserved.                            *
 *                                                                           *
 * ========================================================================= *
 *                                                                           *
 * Redistribution and use in source and binary forms,  with or without modi- *
 * fication, are permitted provided that the following conditions are met:   *
 *                                                                           *
 * 1. Redistributions of source code  must retain the above copyright notice *
 *    notice, this list of conditions and the following disclaimer.          *
 *                                                                           *
 * 2. Redistributions  in binary  form  must  reproduce the  above copyright *
 *    notice,  this list of conditions  and the following  disclaimer in the *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. The end-user documentation  included with the redistribution,  if any, *
 *    must include the following acknowlegement:                             *
 *                                                                           *
 *       "This product includes  software developed  by the Apache  Software *
 *        Foundation <http://www.apache.org/>."                              *
 *                                                                           *
 *    Alternately, this acknowlegement may appear in the software itself, if *
 *    and wherever such third-party acknowlegements normally appear.         *
 *                                                                           *
 * 4. The names  "The  Jakarta  Project",  "Jk",  and  "Apache  Software     *
 *    Foundation"  must not be used  to endorse or promote  products derived *
 *    from this  software without  prior  written  permission.  For  written *
 *    permission, please contact <[e-mail]>.                        *
 *                                                                           *
 * 5. Products derived from this software may not be called "Apache" nor may *
 *    "Apache" appear in their names without prior written permission of the *
 *    Apache Software Foundation.                                            *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES *
 * INCLUDING, BUT NOT LIMITED TO,  THE IMPLIED WARRANTIES OF MERCHANTABILITY *
 * AND FITNESS FOR  A PARTICULAR PURPOSE  ARE DISCLAIMED.  IN NO EVENT SHALL *
 * THE APACHE  SOFTWARE  FOUNDATION OR  ITS CONTRIBUTORS  BE LIABLE  FOR ANY *
 * DIRECT,  INDIRECT,   INCIDENTAL,  SPECIAL,  EXEMPLARY,  OR  CONSEQUENTIAL *
 * DAMAGES (INCLUDING,  BUT NOT LIMITED TO,  PROCUREMENT OF SUBSTITUTE GOODS *
 * OR SERVICES;  LOSS OF USE,  DATA,  OR PROFITS;  OR BUSINESS INTERRUPTION) *
 * HOWEVER CAUSED AND  ON ANY  THEORY  OF  LIABILITY,  WHETHER IN  CONTRACT, *
 * STRICT LIABILITY, OR TORT  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN *
 * ANY  WAY  OUT OF  THE  USE OF  THIS  SOFTWARE,  EVEN  IF  ADVISED  OF THE *
 * POSSIBILITY OF SUCH DAMAGE.                                               *
 *                                                                           *
 * ========================================================================= *
 *                                                                           *
 * This software  consists of voluntary  contributions made  by many indivi- *
 * duals on behalf of the  Apache Software Foundation.  For more information *
 * on the Apache Software Foundation, please see <http://www.apache.org/>.   *
 *                                                                           *
 * ========================================================================= */

/**
 * 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;
            
        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(rr);
            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) {