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SuperNET/crypto777/bitcoind_RPC.c

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/******************************************************************************
* Copyright © 2014-2016 The SuperNET Developers. *
* *
* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
* the top-level directory of this distribution for the individual copyright *
* holder information and the developer policies on copyright and licensing. *
* *
* Unless otherwise agreed in a custom licensing agreement, no part of the *
* SuperNET software, including this file may be copied, modified, propagated *
* or distributed except according to the terms contained in the LICENSE file *
* *
* Removal or modification of this copyright notice is prohibited. *
* *
******************************************************************************/
#include "OS_portable.h"
#ifdef __APPLE__
#define LIQUIDITY_PROVIDER
#endif
#ifdef LIQUIDITY_PROVIDER
#ifdef _WIN32
#include <curl.h>
#include <easy.h>
#else
#include <curl/curl.h>
#include <curl/easy.h>
#endif
// return data from the server
#define CURL_GLOBAL_ALL (CURL_GLOBAL_SSL|CURL_GLOBAL_WIN32)
#define CURL_GLOBAL_SSL (1<<0)
#define CURL_GLOBAL_WIN32 (1<<1)
struct return_string {
char *ptr;
size_t len;
};
size_t accumulate(void *ptr, size_t size, size_t nmemb, struct return_string *s);
void init_string(struct return_string *s);
/************************************************************************
*
* return the current system time in milliseconds
*
************************************************************************/
#define EXTRACT_BITCOIND_RESULT // if defined, ensures error is null and returns the "result" field
#ifdef EXTRACT_BITCOIND_RESULT
/************************************************************************
*
* perform post processing of the results
*
************************************************************************/
char *post_process_bitcoind_RPC(char *debugstr,char *command,char *rpcstr,char *params)
{
long i,j,len;
char *retstr = 0;
cJSON *json,*result,*error;
//printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC.%s.[%s]\n",debugstr,command,rpcstr);
if ( command == 0 || rpcstr == 0 || rpcstr[0] == 0 )
{
printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC.%s.[%s]\n",debugstr,command,rpcstr);
return(rpcstr);
}
json = cJSON_Parse(rpcstr);
if ( json == 0 )
{
printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC.%s can't parse.(%s) params.(%s)\n",debugstr,command,rpcstr,params);
free(rpcstr);
return(0);
}
result = cJSON_GetObjectItem(json,"result");
error = cJSON_GetObjectItem(json,"error");
if ( error != 0 && result != 0 )
{
if ( (error->type&0xff) == cJSON_NULL && (result->type&0xff) != cJSON_NULL )
{
retstr = cJSON_Print(result);
len = strlen(retstr);
if ( retstr[0] == '"' && retstr[len-1] == '"' )
{
for (i=1,j=0; i<len-1; i++,j++)
retstr[j] = retstr[i];
retstr[j] = 0;
}
}
else if ( (error->type&0xff) != cJSON_NULL || (result->type&0xff) != cJSON_NULL )
printf("<<<<<<<<<<< bitcoind_RPC: %s post_process_bitcoind_RPC (%s) error.%s\n",debugstr,command,rpcstr);
free(rpcstr);
} else retstr = rpcstr;
free_json(json);
//fprintf(stderr,"<<<<<<<<<<< bitcoind_RPC: postprocess returns.(%s)\n",retstr);
return(retstr);
}
#endif
/************************************************************************
*
* perform the query
*
************************************************************************/
char *Jay_NXTrequest(char *command,char *params)
{
char *retstr = 0;
// issue JS Jay request
// wait till it is done
return(retstr);
}
char *bitcoind_RPC(char **retstrp,char *debugstr,char *url,char *userpass,char *command,char *params)
{
static int didinit,count,count2; static double elapsedsum,elapsedsum2; extern int32_t USE_JAY;
struct curl_slist *headers = NULL; struct return_string s; CURLcode res; CURL *curl_handle;
char *bracket0,*bracket1,*databuf = 0; long len; int32_t specialcase,numretries; double starttime;
if ( didinit == 0 )
{
didinit = 1;
curl_global_init(CURL_GLOBAL_ALL); //init the curl session
}
if ( USE_JAY != 0 && (strncmp(url,"http://127.0.0.1:7876/nxt",strlen("http://127.0.0.1:7876/nxt")) == 0 || strncmp(url,"https://127.0.0.1:7876/nxt",strlen("https://127.0.0.1:7876/nxt")) == 0) )
{
if ( (databuf= Jay_NXTrequest(command,params)) != 0 )
return(databuf);
}
numretries = 0;
if ( debugstr != 0 && strcmp(debugstr,"BTCD") == 0 && command != 0 && strcmp(command,"SuperNET") == 0 )
specialcase = 1;
else specialcase = 0;
if ( url[0] == 0 )
strcpy(url,"http://127.0.0.1:7876/nxt");
if ( specialcase != 0 && 0 )
printf("<<<<<<<<<<< bitcoind_RPC: debug.(%s) url.(%s) command.(%s) params.(%s)\n",debugstr,url,command,params);
try_again:
if ( retstrp != 0 )
*retstrp = 0;
starttime = OS_milliseconds();
curl_handle = curl_easy_init();
init_string(&s);
headers = curl_slist_append(0,"Expect:");
curl_easy_setopt(curl_handle,CURLOPT_USERAGENT,"mozilla/4.0");//"Mozilla/4.0 (compatible; )");
curl_easy_setopt(curl_handle,CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl_handle,CURLOPT_URL, url);
curl_easy_setopt(curl_handle,CURLOPT_WRITEFUNCTION, (void *)accumulate); // send all data to this function
curl_easy_setopt(curl_handle,CURLOPT_WRITEDATA, &s); // we pass our 's' struct to the callback
curl_easy_setopt(curl_handle,CURLOPT_NOSIGNAL, 1L); // supposed to fix "Alarm clock" and long jump crash
curl_easy_setopt(curl_handle,CURLOPT_NOPROGRESS, 1L); // no progress callback
if ( strncmp(url,"https",5) == 0 )
{
curl_easy_setopt(curl_handle,CURLOPT_SSL_VERIFYPEER,0);
curl_easy_setopt(curl_handle,CURLOPT_SSL_VERIFYHOST,0);
}
if ( userpass != 0 )
curl_easy_setopt(curl_handle,CURLOPT_USERPWD, userpass);
databuf = 0;
if ( params != 0 )
{
if ( command != 0 && specialcase == 0 )
{
len = strlen(params);
if ( len > 0 && params[0] == '[' && params[len-1] == ']' ) {
bracket0 = bracket1 = (char *)"";
}
else
{
bracket0 = (char *)"[";
bracket1 = (char *)"]";
}
databuf = (char *)malloc(256 + strlen(command) + strlen(params));
sprintf(databuf,"{\"id\":\"jl777\",\"method\":\"%s\",\"params\":%s%s%s}",command,bracket0,params,bracket1);
//printf("url.(%s) userpass.(%s) databuf.(%s)\n",url,userpass,databuf);
//
} //else if ( specialcase != 0 ) fprintf(stderr,"databuf.(%s)\n",params);
curl_easy_setopt(curl_handle,CURLOPT_POST,1L);
if ( databuf != 0 )
curl_easy_setopt(curl_handle,CURLOPT_POSTFIELDS,databuf);
else curl_easy_setopt(curl_handle,CURLOPT_POSTFIELDS,params);
}
//laststart = milliseconds();
res = curl_easy_perform(curl_handle);
curl_slist_free_all(headers);
curl_easy_cleanup(curl_handle);
if ( databuf != 0 ) // clean up temporary buffer
{
free(databuf);
databuf = 0;
}
if ( res != CURLE_OK )
{
numretries++;
if ( specialcase != 0 )
{
printf("<<<<<<<<<<< bitcoind_RPC.(%s): BTCD.%s timeout params.(%s) s.ptr.(%s) err.%d\n",url,command,params,s.ptr,res);
free(s.ptr);
return(0);
}
else if ( numretries >= 5 )
{
printf("Maximum number of retries exceeded!\n");
free(s.ptr);
return(0);
}
printf( "curl_easy_perform() failed: %s %s.(%s %s), retries: %d\n",curl_easy_strerror(res),debugstr,url,command,numretries);
free(s.ptr);
sleep((1<<numretries));
goto try_again;
}
else
{
if ( command != 0 && specialcase == 0 )
{
count++;
elapsedsum += (OS_milliseconds() - starttime);
if ( (count % 10000) == 0)
printf("%d: ave %9.6f | elapsed %.3f millis | bitcoind_RPC.(%s) url.(%s)\n",count,elapsedsum/count,(OS_milliseconds() - starttime),command,url);
if ( retstrp != 0 )
{
*retstrp = s.ptr;
return(s.ptr);
}
return(post_process_bitcoind_RPC(debugstr,command,s.ptr,params));
}
else
{
if ( 0 && specialcase != 0 )
fprintf(stderr,"<<<<<<<<<<< bitcoind_RPC: BTCD.(%s) -> (%s)\n",params,s.ptr);
count2++;
elapsedsum2 += (OS_milliseconds() - starttime);
if ( (count2 % 10000) == 0)
printf("%d: ave %9.6f | elapsed %.3f millis | NXT calls.(%s) cmd.(%s)\n",count2,elapsedsum2/count2,(double)(OS_milliseconds() - starttime),url,command);
return(s.ptr);
}
}
printf("bitcoind_RPC: impossible case\n");
free(s.ptr);
return(0);
}
/************************************************************************
*
* Initialize the string handler so that it is thread safe
*
************************************************************************/
void init_string(struct return_string *s)
{
s->len = 0;
s->ptr = (char *)calloc(1,s->len+1);
if ( s->ptr == NULL )
{
fprintf(stderr,"init_string malloc() failed\n");
exit(-1);
}
s->ptr[0] = '\0';
}
/************************************************************************
*
* Use the "writer" to accumulate text until done
*
************************************************************************/
size_t accumulate(void *ptr,size_t size,size_t nmemb,struct return_string *s)
{
size_t new_len = s->len + size*nmemb;
s->ptr = (char *)realloc(s->ptr,new_len+1);
if ( s->ptr == NULL )
{
fprintf(stderr, "accumulate realloc() failed\n");
exit(-1);
}
memcpy(s->ptr+s->len,ptr,size*nmemb);
s->ptr[new_len] = '\0';
s->len = new_len;
return(size * nmemb);
}
struct MemoryStruct { char *memory; size_t size; };
static size_t WriteMemoryCallback(void *ptr,size_t size,size_t nmemb,void *data)
{
size_t realsize = (size * nmemb);
struct MemoryStruct *mem = (struct MemoryStruct *)data;
mem->memory = (ptr != 0) ? realloc(mem->memory,mem->size + realsize + 1) : malloc(mem->size + realsize + 1);
if ( mem->memory != 0 )
{
if ( ptr != 0 )
memcpy(&(mem->memory[mem->size]),ptr,realsize);
mem->size += realsize;
mem->memory[mem->size] = 0;
}
//printf("got %d bytes\n",(int32_t)(size*nmemb));
return(realsize);
}
void *curl_post(CURL **cHandlep,char *url,char *userpass,char *postfields,char *hdr0,char *hdr1,char *hdr2,char *hdr3)
{
struct MemoryStruct chunk; CURL *cHandle; long code; struct curl_slist *headers = 0;
if ( (cHandle= *cHandlep) == NULL )
*cHandlep = cHandle = curl_easy_init();
else curl_easy_reset(cHandle);
//#ifdef DEBUG
//curl_easy_setopt(cHandle,CURLOPT_VERBOSE, 1);
//#endif
curl_easy_setopt(cHandle,CURLOPT_USERAGENT,"mozilla/4.0");//"Mozilla/4.0 (compatible; )");
curl_easy_setopt(cHandle,CURLOPT_SSL_VERIFYPEER,0);
//curl_easy_setopt(cHandle,CURLOPT_SSLVERSION,1);
curl_easy_setopt(cHandle,CURLOPT_URL,url);
curl_easy_setopt(cHandle,CURLOPT_CONNECTTIMEOUT,10);
if ( userpass != 0 && userpass[0] != 0 )
curl_easy_setopt(cHandle,CURLOPT_USERPWD,userpass);
if ( postfields != 0 && postfields[0] != 0 )
{
curl_easy_setopt(cHandle,CURLOPT_POST,1);
curl_easy_setopt(cHandle,CURLOPT_POSTFIELDS,postfields);
}
if ( hdr0 != NULL && hdr0[0] != 0 )
{
//printf("HDR0.(%s) HDR1.(%s) HDR2.(%s) HDR3.(%s)\n",hdr0!=0?hdr0:"",hdr1!=0?hdr1:"",hdr2!=0?hdr2:"",hdr3!=0?hdr3:"");
headers = curl_slist_append(headers,hdr0);
if ( hdr1 != 0 && hdr1[0] != 0 )
headers = curl_slist_append(headers,hdr1);
if ( hdr2 != 0 && hdr2[0] != 0 )
headers = curl_slist_append(headers,hdr2);
if ( hdr3 != 0 && hdr3[0] != 0 )
headers = curl_slist_append(headers,hdr3);
} //headers = curl_slist_append(0,"Expect:");
if ( headers != 0 )
curl_easy_setopt(cHandle,CURLOPT_HTTPHEADER,headers);
//res = curl_easy_perform(cHandle);
memset(&chunk,0,sizeof(chunk));
curl_easy_setopt(cHandle,CURLOPT_WRITEFUNCTION,WriteMemoryCallback);
curl_easy_setopt(cHandle,CURLOPT_WRITEDATA,(void *)&chunk);
curl_easy_perform(cHandle);
curl_easy_getinfo(cHandle,CURLINFO_RESPONSE_CODE,&code);
if ( headers != 0 )
curl_slist_free_all(headers);
if ( code != 200 )
printf("(%s) server responded with code %ld (%s)\n",url,code,chunk.memory);
return(chunk.memory);
}
void curlhandle_free(void *curlhandle)
{
curl_easy_cleanup(curlhandle);
}
#else
char *bitcoind_RPC(char **retstrp,char *debugstr,char *url,char *userpass,char *command,char *params)
{
return(clonestr("{\"error\":\"curl is disabled\"}"));
}
void *curl_post(void **cHandlep,char *url,char *userpass,char *postfields,char *hdr0,char *hdr1,char *hdr2,char *hdr3)
{
return(clonestr("{\"error\":\"curl is disabled\"}"));
}
#endif