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#include <curl/curl.h> /* libcurl header */
#include "CurlGlue.h" /* the JNI-generated glue header file */
/*
* This is a private struct allocated for every 'CurlGlue' object.
*/
struct javacurl {
void *libcurl;
void *whatever;
struct writecallback {
jmethodID mid;
JNIEnv *java;
jclass cls; /* global reference */
jobject object;
} write;
};
JNIEXPORT jint JNICALL Java_CurlGlue_jni_1init(JNIEnv *java,
jobject myself)
{
void *libhandle;
struct javacurl *jcurl=NULL;
libhandle = curl_easy_init();
if(libhandle) {
jcurl=(struct javacurl *)malloc(sizeof(struct javacurl));
if(jcurl) {
memset(jcurl, 0, sizeof(struct javacurl));
jcurl->libcurl = libhandle;
}
else {
curl_easy_cleanup(libhandle);
return (jint)0;
}
}
return (jint) jcurl; /* nasty typecast */
}
JNIEXPORT void JNICALL Java_CurlGlue_jni_1cleanup(JNIEnv *java,
jobject myself,
jint jcurl)
{
struct javacurl *curl = (struct javacurl*)jcurl;
if(curl->write.cls) {
/* a global reference we must delete */
(*java)->DeleteGlobalRef(java, curl->write.cls);
(*java)->DeleteGlobalRef(java, curl->write.object);
}
curl_easy_cleanup(curl->libcurl); /* cleanup libcurl stuff */
free((void *)curl); /* free the struct too */
}
/*
* setopt() int + string
*/
JNIEXPORT jint JNICALL Java_CurlGlue_jni_1setopt__IILjava_lang_String_2
(JNIEnv *java, jobject myself, jint jcurl, jint option, jstring value)
{
/* get the actual string C-style */
const char *str = (*java)->GetStringUTFChars(java, value, 0);
void *handle = (void *)((struct javacurl*)jcurl)->libcurl;
puts("setopt int + string");
return (jint)curl_easy_setopt(handle, (CURLoption)option, str);
}
/*
* setopt() int + int
*/
JNIEXPORT jint JNICALL Java_CurlGlue_jni_1setopt__III
(JNIEnv *java, jobject myself, jint jcurl, jint option, jint value)
{
void *handle = (void *)((struct javacurl*)jcurl)->libcurl;
CURLoption opt = (CURLoption)option;
puts("setopt int + int");
switch(opt) {
case CURLOPT_FILE:
/* silently ignored, we don't need user-specified callback data when
we have an object, and besides the CURLOPT_FILE is not exported
to the java interface */
return 0;
}
return (jint)curl_easy_setopt(handle, (CURLoption)option, value);
}
static int javacurl_write_callback(void *ptr,
size_t size,
size_t nmemb,
FILE *stream)
{
struct javacurl *curl = (struct javacurl *)stream;
size_t realsize = size * nmemb;
JNIEnv *java = curl->write.java;
jbyteArray jb=NULL;
int ret=0;
fprintf(stderr, "%d bytes data received in callback:\n"
"ptr=%p, java=%p cls=%p\n",
realsize, curl, java, curl->write.cls);
jb=(*java)->NewByteArray(java, realsize);
(*java)->SetByteArrayRegion(java, jb, 0,
realsize, (jbyte *)ptr);
fprintf(stderr, "created byte-array\n");
ret = (*java)->CallIntMethod(java,
curl->write.object,
curl->write.mid,
jb);
fprintf(stderr, "java-method returned %d\n", ret);
return realsize;
}
/*
* setopt() int + object
*/
JNIEXPORT jint JNICALL Java_CurlGlue_jni_1setopt__IILCurlWrite_2
(JNIEnv *java, jobject myself, jint jcurl, jint option, jobject object)
{
jclass cls_local = (*java)->GetObjectClass(java, object);
jmethodID mid;
struct javacurl *curl = (struct javacurl *)jcurl;
jclass cls;
jobject obj_global;
switch(option) {
case CURLOPT_WRITEFUNCTION:
/* this makes a reference that'll be alive until we kill it! */
cls = (*java)->NewGlobalRef(java, cls_local);
printf("setopt int + object, option = %d cls= %p\n",
option, cls);
if(!cls) {
puts("couldn't make local reference global");
return 0;
}
/* this is the write callback */
mid = (*java)->GetMethodID(java, cls, "handleString", "([B)I");
if(!mid) {
puts("no callback method found");
return 0;
}
obj_global = (*java)->NewGlobalRef(java, object);
curl->write.mid = mid;
curl->write.cls = cls;
curl->write.object = obj_global;
/*curl->write.java = java; stored on perform */
fprintf(stderr, "setopt write callback and write file pointer %p, java = %p\n",
curl, java);
curl_easy_setopt(curl->libcurl, CURLOPT_WRITEFUNCTION,
javacurl_write_callback);
curl_easy_setopt(curl->libcurl, CURLOPT_FILE,
curl);
break;
}
return 0;
}
JNIEXPORT jint JNICALL Java_CurlGlue_getinfo
(JNIEnv *java, jobject value)
{
return 0;
}
JNIEXPORT jint JNICALL Java_CurlGlue_jni_1perform
(JNIEnv *java, jobject myself, jint jcurl)
{
struct javacurl *curl=(struct javacurl*)jcurl;
curl->write.java = java;
return (jint)curl_easy_perform(curl->libcurl);
}
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