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/* curl-shim.c - Implement a small subset of the curl API in terms of
* the iobuf HTTP API
*
* Copyright (C) 2005 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "http.h"
#include "util.h"
#include "curl-shim.h"
static CURLcode handle_error(CURL *curl,CURLcode err,const char *str)
{
if(curl->errorbuffer)
{
switch(err)
{
case CURLE_OK:
strcpy(curl->errorbuffer,"okay");
break;
case CURLE_COULDNT_CONNECT:
strcpy(curl->errorbuffer,"couldn't connect");
break;
case CURLE_WRITE_ERROR:
strcpy(curl->errorbuffer,"write error");
break;
default:
strcpy(curl->errorbuffer,"generic error");
break;
}
if(str && (strlen(curl->errorbuffer)+2+strlen(str)+1)<=CURL_ERROR_SIZE)
{
strcat(curl->errorbuffer,": ");
strcat(curl->errorbuffer,str);
}
}
return err;
}
CURLcode curl_global_init(long flags)
{
return CURLE_OK;
}
void curl_global_cleanup(void) {}
CURL *curl_easy_init(void)
{
return calloc(1,sizeof(CURL));
}
void curl_easy_cleanup(CURL *curl)
{
free(curl);
}
CURLcode curl_easy_setopt(CURL *curl,CURLoption option,...)
{
va_list ap;
va_start(ap,option);
switch(option)
{
case CURLOPT_URL:
curl->url=va_arg(ap,char *);
break;
case CURLOPT_WRITEFUNCTION:
curl->writer=va_arg(ap,write_func);
break;
case CURLOPT_FILE:
curl->file=va_arg(ap,void *);
break;
case CURLOPT_ERRORBUFFER:
curl->errorbuffer=va_arg(ap,char *);
break;
case CURLOPT_PROXY:
curl->proxy=va_arg(ap,char *);
break;
default:
/* We ignore the huge majority of curl options */
break;
}
return handle_error(curl,CURLE_OK,NULL);
}
CURLcode curl_easy_perform(CURL *curl)
{
int rc;
CURLcode err=CURLE_OK;
const char *errstr=NULL;
rc=http_open_document(&curl->hd,curl->url,0,curl->proxy);
if(rc!=0)
{
if(rc==G10ERR_NETWORK)
errstr=strerror(errno);
else
errstr=g10_errstr(rc);
err=CURLE_COULDNT_CONNECT;
}
else
{
unsigned int maxlen=1024,buflen,len;
byte *line=NULL;
while((len=iobuf_read_line(curl->hd.fp_read,&line,&buflen,&maxlen)))
{
maxlen=1024;
size_t ret;
ret=(curl->writer)(line,len,1,curl->file);
if(ret!=len)
{
err=CURLE_WRITE_ERROR;
break;
}
}
m_free(line);
http_close(&curl->hd);
}
return handle_error(curl,err,errstr);
}
/* This is not the same exact set that is allowed according to
RFC-2396, but it is what the real curl uses. */
#define VALID_URI_CHARS "abcdefghijklmnopqrstuvwxyz" \
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
"0123456789"
char *curl_escape(char *str,int length)
{
int len,max,idx,enc_idx=0;
char *enc;
if(length)
len=length;
else
len=strlen(str);
enc=malloc(len+1);
if(!enc)
return enc;
max=len;
for(idx=0;idx<len;idx++)
{
if(enc_idx+3>max)
{
char *tmp;
max+=100;
tmp=realloc(enc,max+1);
if(!tmp)
{
free(enc);
return NULL;
}
enc=tmp;
}
if(strchr(VALID_URI_CHARS,str[idx]))
enc[enc_idx++]=str[idx];
else
{
char numbuf[5];
sprintf(numbuf,"%%%02X",str[idx]);
strcpy(&enc[enc_idx],numbuf);
enc_idx+=3;
}
}
enc[enc_idx]='\0';
return enc;
}
void curl_free(char *ptr)
{
free(ptr);
}
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