pi3servletinputstream.cpp

mini http server,可以集成嵌入到程序中,实现简单的web功能

/*____________________________________________________________________________*\
 *

 Copyright (c) 1997-2003 John Roy, Holger Zimmermann. All rights reserved.

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 FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
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    notice, this list of conditions and the following disclaimer. 

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    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the
    distribution.

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    derived from this software without specific prior written permission. 

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 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 *____________________________________________________________________________*|
 *
 * $Source: /cvsroot/pi3web/Pi3Web_200/Source/Servlet/Pi3ServletInputStream.cpp,v $
 * $Date: 2003/05/13 18:42:19 $
 *
 Description:
	Execute an servlet extension.

\*____________________________________________________________________________*/
//$SourceTop:$

#include <jni.h>                                        /* where everything is defined */
#include "org_pi3_servlet_core_Pi3ServletInputStream.h" /* automatically created JNI header */
#include "PiAPI.h"
#define PI3_INTERNAL
#include "Pi3API.h"
#include "ServletHandler.h"
#include <wchar.h>

/*
 * Class:     org_pi3_servlet_core_Pi3ServletInputStream
 * Method:    available
 * Signature: ()I
 */
JNIEXPORT jint JNICALL Java_org_pi3_servlet_core_Pi3ServletInputStream_available
(JNIEnv *env, jobject ins) {
	jclass cls = env->GetObjectClass(ins);
	jmethodID getPiHttp;
	getPiHttp = env->GetMethodID( cls, "getPiHttp", "()I");
	// Errorhandling!
	if (!getPiHttp) { return -1; };
	env->ExceptionClear();

	int PiHttp = env->CallIntMethod(ins, getPiHttp);
	if ( env->ExceptionOccurred() )
		{
		env->ExceptionDescribe();
		env->ExceptionClear();
		// Errorhandling!
		return -1;
		};

	/* ---
	check PIIOBuffer if data available
	--- */
	PIHTTP *pPIHTTP = (PIHTTP *)PiHttp;
	int iRes = PIIOBuffer_pollBeforeRead( pPIHTTP->pBuffer );
	PIIOBuffer *pBuf = (PIIOBuffer *)(pPIHTTP->pBuffer);
	return (iRes <= 0) ? 0 : pBuf->getBufferLen();
#undef PI3_INTERNAL
};

/*
 * Class:     org_pi3_servlet_core_Pi3ServletInputStream
 * Method:    internalRead
 * Signature: ()I
 */
JNIEXPORT jint JNICALL Java_org_pi3_servlet_core_Pi3ServletInputStream_internalReadB
(JNIEnv *env, jobject ins) {

	jclass cls = env->GetObjectClass(ins);
	jmethodID getPiHttp;
	getPiHttp = env->GetMethodID( cls, "getPiHttp", "()I");
	// Errorhandling!
	if (!getPiHttp) { return -1; };
	env->ExceptionClear();

	int PiHttp = env->CallIntMethod(ins, getPiHttp);
	if ( env->ExceptionOccurred() )
		{
		env->ExceptionDescribe();
		env->ExceptionClear();
		// Errorhandling!
		return -1;
		};

	/* ---
	read 1 byte from PIIOBuffer
	--- */
	PIHTTP *pPIHTTP = (PIHTTP *)PiHttp;
	char cBuf;
	int iRes = PIIOBuffer_pollBeforeRead( pPIHTTP->pBuffer );
    if (iRes <= 0) { goto read_error; };

	iRes = PIIOBuffer_readToBuffer( pPIHTTP->pBuffer, &cBuf, 1 );

	/* ---
	copy char to wide char
	--- */
	if (iRes > 0) {
		wchar_t wc;
		return mbtowc(&wc, &cBuf, 1) 
			> 0 ? wc : -1;
	};

read_error:
	switch (iRes) {
	    case  0: return -1; // stream closed
        case -1: {
					cls = env->FindClass("java/io/IOException");
					if (cls) { env->ThrowNew(cls, "Error in PIIOBuffer_readToBuffer."); };
					// fall through default (return piRead)
				 };
        default:  return iRes;
	};
};

/*
 * Class:     org_pi3_servlet_core_Pi3ServletInputStream
 * Method:    internalReadA
 * Signature: ([BII)I
 */
JNIEXPORT jint JNICALL Java_org_pi3_servlet_core_Pi3ServletInputStream_internalReadA
(JNIEnv *env, jobject ins, jbyteArray arr, jint off, jint len) {

	jclass cls = env->GetObjectClass(ins);
	jmethodID getPiHttp;
	getPiHttp = env->GetMethodID( cls, "getPiHttp", "()I");
	// Errorhandling!
	if (!getPiHttp) { return -1; };
	env->ExceptionClear();

	int PiHttp = env->CallIntMethod(ins, getPiHttp);
	if ( env->ExceptionOccurred() )
		{
		env->ExceptionDescribe();
		env->ExceptionClear();
		// Errorhandling!
		return -1;
		};

	/* ---
	read len bytes from PIIOBuffer
	--- */
	PIHTTP *pPIHTTP = (PIHTTP *)PiHttp;
	char *szBuf;
	int iRes = PIIOBuffer_pollBeforeRead( pPIHTTP->pBuffer );
    if (iRes <= 0) { goto read_error; };

	szBuf = (char *)PIUtil_malloc(len);
	iRes = PIIOBuffer_readToBuffer( pPIHTTP->pBuffer, szBuf, len );

	/* ---
	copy char buffer to java array
	--- */
	if (iRes > 0) {
		// off + len <= array size is already checked on the java side!
		env->SetByteArrayRegion(arr, off, iRes, (jbyte *)szBuf); 
	};

	PIUtil_free(szBuf);

	if ( env->ExceptionOccurred() )
		{
		env->ExceptionDescribe();
		env->ExceptionClear();
		// Errorhandling!
		return -1;
		};

read_error:
	switch (iRes) {
	    case  0: return -1; // stream closed
        case -1: {
					cls = env->FindClass("java/io/IOException");
					if (cls) { env->ThrowNew(cls, "Error in PIIOBuffer_readToBuffer."); };
					// fall through default (return piRead)
				 };
        default:  return iRes;
	};
};