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curl/lib/non-ascii.c

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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#ifdef CURL_DOES_CONVERSIONS
#include <curl/curl.h>
#include "non-ascii.h"
#include "formdata.h"
#include "sendf.h"
#include "urldata.h"
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
#ifdef HAVE_ICONV
#include <iconv.h>
/* set default codesets for iconv */
#ifndef CURL_ICONV_CODESET_OF_NETWORK
#define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
#endif
#ifndef CURL_ICONV_CODESET_FOR_UTF8
#define CURL_ICONV_CODESET_FOR_UTF8 "UTF-8"
#endif
#define ICONV_ERROR (size_t)-1
#endif /* HAVE_ICONV */
/*
* Curl_convert_clone() returns a malloced copy of the source string (if
* returning CURLE_OK), with the data converted to network format.
*/
CURLcode Curl_convert_clone(struct Curl_easy *data,
const char *indata,
size_t insize,
char **outbuf)
{
char *convbuf;
CURLcode result;
convbuf = malloc(insize);
if(!convbuf)
return CURLE_OUT_OF_MEMORY;
memcpy(convbuf, indata, insize);
result = Curl_convert_to_network(data, convbuf, insize);
if(result) {
free(convbuf);
return result;
}
*outbuf = convbuf; /* return the converted buffer */
return CURLE_OK;
}
/*
* Curl_convert_to_network() is an internal function for performing ASCII
* conversions on non-ASCII platforms. It convers the buffer _in place_.
*/
CURLcode Curl_convert_to_network(struct Curl_easy *data,
char *buffer, size_t length)
{
if(data->set.convtonetwork) {
/* use translation callback */
CURLcode result = data->set.convtonetwork(buffer, length);
if(result) {
failf(data,
"CURLOPT_CONV_TO_NETWORK_FUNCTION callback returned %d: %s",
(int)result, curl_easy_strerror(result));
}
return result;
}
else {
#ifdef HAVE_ICONV
/* do the translation ourselves */
char *input_ptr, *output_ptr;
size_t in_bytes, out_bytes, rc;
int error;
/* open an iconv conversion descriptor if necessary */
if(data->outbound_cd == (iconv_t)-1) {
data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
CURL_ICONV_CODESET_OF_HOST);
if(data->outbound_cd == (iconv_t)-1) {
error = ERRNO;
failf(data,
"The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
CURL_ICONV_CODESET_OF_NETWORK,
CURL_ICONV_CODESET_OF_HOST,
error, strerror(error));
return CURLE_CONV_FAILED;
}
}
/* call iconv */
input_ptr = output_ptr = buffer;
in_bytes = out_bytes = length;
rc = iconv(data->outbound_cd, (const char **)&input_ptr, &in_bytes,
&output_ptr, &out_bytes);
if((rc == ICONV_ERROR) || (in_bytes != 0)) {
error = ERRNO;
failf(data,
"The Curl_convert_to_network iconv call failed with errno %i: %s",
error, strerror(error));
return CURLE_CONV_FAILED;
}
#else
failf(data, "CURLOPT_CONV_TO_NETWORK_FUNCTION callback required");
return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
}
return CURLE_OK;
}
/*
* Curl_convert_from_network() is an internal function for performing ASCII
* conversions on non-ASCII platforms. It convers the buffer _in place_.
*/
CURLcode Curl_convert_from_network(struct Curl_easy *data,
char *buffer, size_t length)
{
if(data->set.convfromnetwork) {
/* use translation callback */
CURLcode result = data->set.convfromnetwork(buffer, length);
if(result) {
failf(data,
"CURLOPT_CONV_FROM_NETWORK_FUNCTION callback returned %d: %s",
(int)result, curl_easy_strerror(result));
}
return result;
}
else {
#ifdef HAVE_ICONV
/* do the translation ourselves */
char *input_ptr, *output_ptr;
size_t in_bytes, out_bytes, rc;
int error;
/* open an iconv conversion descriptor if necessary */
if(data->inbound_cd == (iconv_t)-1) {
data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_OF_NETWORK);
if(data->inbound_cd == (iconv_t)-1) {
error = ERRNO;
failf(data,
"The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_OF_NETWORK,
error, strerror(error));
return CURLE_CONV_FAILED;
}
}
/* call iconv */
input_ptr = output_ptr = buffer;
in_bytes = out_bytes = length;
rc = iconv(data->inbound_cd, (const char **)&input_ptr, &in_bytes,
&output_ptr, &out_bytes);
if((rc == ICONV_ERROR) || (in_bytes != 0)) {
error = ERRNO;
failf(data,
"Curl_convert_from_network iconv call failed with errno %i: %s",
error, strerror(error));
return CURLE_CONV_FAILED;
}
#else
failf(data, "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback required");
return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
}
return CURLE_OK;
}
/*
* Curl_convert_from_utf8() is an internal function for performing UTF-8
* conversions on non-ASCII platforms.
*/
CURLcode Curl_convert_from_utf8(struct Curl_easy *data,
char *buffer, size_t length)
{
if(data->set.convfromutf8) {
/* use translation callback */
CURLcode result = data->set.convfromutf8(buffer, length);
if(result) {
failf(data,
"CURLOPT_CONV_FROM_UTF8_FUNCTION callback returned %d: %s",
(int)result, curl_easy_strerror(result));
}
return result;
}
else {
#ifdef HAVE_ICONV
/* do the translation ourselves */
const char *input_ptr;
char *output_ptr;
size_t in_bytes, out_bytes, rc;
int error;
/* open an iconv conversion descriptor if necessary */
if(data->utf8_cd == (iconv_t)-1) {
data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_FOR_UTF8);
if(data->utf8_cd == (iconv_t)-1) {
error = ERRNO;
failf(data,
"The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_FOR_UTF8,
error, strerror(error));
return CURLE_CONV_FAILED;
}
}
/* call iconv */
input_ptr = output_ptr = buffer;
in_bytes = out_bytes = length;
rc = iconv(data->utf8_cd, &input_ptr, &in_bytes,
&output_ptr, &out_bytes);
if((rc == ICONV_ERROR) || (in_bytes != 0)) {
error = ERRNO;
failf(data,
"The Curl_convert_from_utf8 iconv call failed with errno %i: %s",
error, strerror(error));
return CURLE_CONV_FAILED;
}
if(output_ptr < input_ptr) {
/* null terminate the now shorter output string */
*output_ptr = 0x00;
}
#else
failf(data, "CURLOPT_CONV_FROM_UTF8_FUNCTION callback required");
return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
}
return CURLE_OK;
}
/*
* Init conversion stuff for a Curl_easy
*/
void Curl_convert_init(struct Curl_easy *data)
{
#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
/* conversion descriptors for iconv calls */
data->outbound_cd = (iconv_t)-1;
data->inbound_cd = (iconv_t)-1;
data->utf8_cd = (iconv_t)-1;
#else
(void)data;
#endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */
}
/*
* Setup conversion stuff for a Curl_easy
*/
void Curl_convert_setup(struct Curl_easy *data)
{
data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_OF_NETWORK);
data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
CURL_ICONV_CODESET_OF_HOST);
data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
CURL_ICONV_CODESET_FOR_UTF8);
}
/*
* Close conversion stuff for a Curl_easy
*/
void Curl_convert_close(struct Curl_easy *data)
{
#ifdef HAVE_ICONV
/* close iconv conversion descriptors */
if(data->inbound_cd != (iconv_t)-1) {
iconv_close(data->inbound_cd);
}
if(data->outbound_cd != (iconv_t)-1) {
iconv_close(data->outbound_cd);
}
if(data->utf8_cd != (iconv_t)-1) {
iconv_close(data->utf8_cd);
}
#else
(void)data;
#endif /* HAVE_ICONV */
}
/*
* Curl_convert_form() is used from http.c, this converts any form items that
need to be sent in the network encoding. Returns CURLE_OK on success.
*/
CURLcode Curl_convert_form(struct Curl_easy *data, struct FormData *form)
{
CURLcode result;
if(!data)
return CURLE_BAD_FUNCTION_ARGUMENT;
while(form) {
if(form->type == FORM_DATA) {
result = Curl_convert_to_network(data, form->line, form->length);
/* Curl_convert_to_network calls failf if unsuccessful */
if(result)
return result;
}
form = form->next;
}
return CURLE_OK;
}
#endif /* CURL_DOES_CONVERSIONS */
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