/
mime.c
1497 lines (1252 loc) · 37.1 KB
/
mime.c
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, 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"
#include <curl/curl.h>
#include "mime.h"
#include "non-ascii.h"
#if !defined(CURL_DISABLE_HTTP) || !defined(CURL_DISABLE_SMTP) || \
!defined(CURL_DISABLE_IMAP)
#if defined(HAVE_LIBGEN_H) && defined(HAVE_BASENAME)
#include <libgen.h>
#endif
#include "rand.h"
#include "slist.h"
#include "strcase.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
#ifdef WIN32
# ifndef R_OK
# define R_OK 4
# endif
#endif
#define FILE_CONTENTTYPE_DEFAULT "application/octet-stream"
#define MULTIPART_CONTENTTYPE_DEFAULT "multipart/mixed"
#define DISPOSITION_DEFAULT "attachment"
#define READ_ERROR ((size_t) -1)
#ifndef __VMS
#define filesize(name, stat_data) (stat_data.st_size)
#define fopen_read fopen
#else
#include <fabdef.h>
/*
* get_vms_file_size does what it takes to get the real size of the file
*
* For fixed files, find out the size of the EOF block and adjust.
*
* For all others, have to read the entire file in, discarding the contents.
* Most posted text files will be small, and binary files like zlib archives
* and CD/DVD images should be either a STREAM_LF format or a fixed format.
*
*/
curl_off_t VmsRealFileSize(const char *name,
const struct_stat *stat_buf)
{
char buffer[8192];
curl_off_t count;
int ret_stat;
FILE * file;
file = fopen(name, FOPEN_READTEXT); /* VMS */
if(file == NULL)
return 0;
count = 0;
ret_stat = 1;
while(ret_stat > 0) {
ret_stat = fread(buffer, 1, sizeof(buffer), file);
if(ret_stat != 0)
count += ret_stat;
}
fclose(file);
return count;
}
/*
*
* VmsSpecialSize checks to see if the stat st_size can be trusted and
* if not to call a routine to get the correct size.
*
*/
static curl_off_t VmsSpecialSize(const char *name,
const struct_stat *stat_buf)
{
switch(stat_buf->st_fab_rfm) {
case FAB$C_VAR:
case FAB$C_VFC:
return VmsRealFileSize(name, stat_buf);
break;
default:
return stat_buf->st_size;
}
}
#define filesize(name, stat_data) VmsSpecialSize(name, &stat_data)
/*
* vmsfopenread
*
* For upload to work as expected on VMS, different optional
* parameters must be added to the fopen command based on
* record format of the file.
*
*/
static FILE * vmsfopenread(const char *file, const char *mode)
{
struct_stat statbuf;
int result;
result = stat(file, &statbuf);
switch(statbuf.st_fab_rfm) {
case FAB$C_VAR:
case FAB$C_VFC:
case FAB$C_STMCR:
return fopen(file, FOPEN_READTEXT); /* VMS */
break;
default:
return fopen(file, FOPEN_READTEXT, "rfm=stmlf", "ctx=stm");
}
}
#define fopen_read vmsfopenread
#endif
#ifndef HAVE_BASENAME
/*
(Quote from The Open Group Base Specifications Issue 6 IEEE Std 1003.1, 2004
Edition)
The basename() function shall take the pathname pointed to by path and
return a pointer to the final component of the pathname, deleting any
trailing '/' characters.
If the string pointed to by path consists entirely of the '/' character,
basename() shall return a pointer to the string "/". If the string pointed
to by path is exactly "//", it is implementation-defined whether '/' or "//"
is returned.
If path is a null pointer or points to an empty string, basename() shall
return a pointer to the string ".".
The basename() function may modify the string pointed to by path, and may
return a pointer to static storage that may then be overwritten by a
subsequent call to basename().
The basename() function need not be reentrant. A function that is not
required to be reentrant is not required to be thread-safe.
*/
static char *Curl_basename(char *path)
{
/* Ignore all the details above for now and make a quick and simple
implementaion here */
char *s1;
char *s2;
s1=strrchr(path, '/');
s2=strrchr(path, '\\');
if(s1 && s2) {
path = (s1 > s2? s1 : s2)+1;
}
else if(s1)
path = s1 + 1;
else if(s2)
path = s2 + 1;
return path;
}
#define basename(x) Curl_basename((x))
#endif
/* Set readback state. */
static void mimesetstate(struct mime_state *state,
enum mimestate tok, void *ptr)
{
state->state = tok;
state->ptr = ptr;
state->offset = 0;
}
/* Escape header string into allocated memory. */
static char *escape_string(const char *src, ssize_t srclen)
{
size_t len = srclen >= 0? (size_t) srclen: strlen(src);
size_t bytecount;
size_t i;
char *dst;
bytecount = len;
for(i = 0; i < len; i++)
if(src[i] == '"' || src[i] == '\\' || !src[i])
bytecount++;
dst = malloc(bytecount + 1);
if(!dst)
return NULL;
for(i = 0; len; len--) {
char c = *src++;
if(c == '"' || c == '\\' || !c)
dst[i++] = '\\';
dst[i++] = c? c: '0';
}
dst[i] = '\0';
return dst;
}
/* Check if header matches. */
static char *match_header(struct curl_slist *hdr, const char *lbl, size_t len)
{
char *value = NULL;
if(strncasecompare(hdr->data, lbl, len) && hdr->data[len] == ':')
for(value = hdr->data + len + 1; *value == ' '; value++)
;
return value;
}
/* Get a header from an slist. */
static char *search_header(struct curl_slist *hdrlist, const char *hdr)
{
size_t len = strlen(hdr);
char *value = NULL;
for(; !value && hdrlist; hdrlist = hdrlist->next)
value = match_header(hdrlist, hdr, len);
return value;
}
static char *strippath(const char *fullfile)
{
char *filename;
char *base;
filename = strdup(fullfile); /* duplicate since basename() may ruin the
buffer it works on */
if(!filename)
return NULL;
base = strdup(basename(filename));
free(filename); /* free temporary buffer */
return base; /* returns an allocated string or NULL ! */
}
/* In-memory data callbacks. */
/* Argument is a pointer to the mime part. */
static size_t mime_mem_read(char *buffer, size_t size, size_t nitems,
void *instream)
{
struct Curl_mimepart *part = (struct Curl_mimepart *) instream;
size_t sz = part->datasize - part->state.offset;
(void) size; /* Always 1.*/
if(sz > nitems)
sz = nitems;
if(sz)
memcpy(buffer, (char *) part->data, sz);
part->state.offset += sz;
return sz;
}
static int mime_mem_seek(void *instream, curl_off_t offset, int whence)
{
struct Curl_mimepart *part = (struct Curl_mimepart *) instream;
switch(whence) {
case SEEK_CUR:
offset += part->state.offset;
break;
case SEEK_END:
offset += part->datasize;
break;
}
if(offset < 0 || offset > part->datasize)
return CURL_SEEKFUNC_FAIL;
part->state.offset = offset;
return CURL_SEEKFUNC_OK;
}
static void mime_mem_free(void *ptr)
{
Curl_safefree(((struct Curl_mimepart *) ptr)->data);
}
/* Open file callbacks. */
/* Argument is the FILE pointer. */
static size_t mime_file_read(char *buffer, size_t size, size_t nitems,
void *instream)
{
return (size_t) fread(buffer, size, nitems, instream);
}
static int mime_file_seek(void *instream, curl_off_t offset, int whence)
{
FILE *fp = (FILE *) instream;
return fseek(fp, (long) offset, whence)?
CURL_SEEKFUNC_CANTSEEK: CURL_SEEKFUNC_OK;
}
/* Named file callbacks. */
/* Argument is a pointer to the mime part. */
static int mime_open_namedfile(struct Curl_mimepart * part)
{
/* Open a MIMEKIND_NAMEDFILE part. */
if(part->namedfp)
return 0;
part->namedfp = fopen_read(part->data, "rb");
return part->namedfp? 0: -1;
}
static size_t mime_namedfile_read(char *buffer, size_t size, size_t nitems,
void *instream)
{
struct Curl_mimepart *part = (struct Curl_mimepart *) instream;
if(mime_open_namedfile(part))
return READ_ERROR;
return mime_file_read(buffer, size, nitems, part->namedfp);
}
static int mime_namedfile_seek(void *instream, curl_off_t offset, int whence)
{
struct Curl_mimepart *part = (struct Curl_mimepart *) instream;
switch(whence) {
case SEEK_CUR:
if(part->namedfp)
offset += ftell(part->namedfp);
break;
case SEEK_END:
offset += part->datasize;
break;
}
if(!offset && !part->namedfp)
return CURL_SEEKFUNC_OK;
if(mime_open_namedfile(part))
return CURL_SEEKFUNC_FAIL;
return mime_file_seek(part->namedfp, offset, SEEK_SET);
}
static void mime_namedfile_free(void *ptr)
{
struct Curl_mimepart *part = (struct Curl_mimepart *) ptr;
if(part->namedfp) {
fclose(part->namedfp);
part->namedfp = NULL;
}
Curl_safefree(part->data);
part->data = NULL;
}
/* Subparts callbacks. */
/* Argument is a pointer to the mime structure. */
/* Readback a byte string segment. */
static size_t readback_bytes(struct mime_state *state,
char *buffer, size_t bufsize,
const char *bytes, size_t numbytes,
const char *trail)
{
size_t sz;
sz = numbytes - state->offset;
if(numbytes > state->offset) {
sz = numbytes - state->offset;
bytes += state->offset;
}
else {
size_t tsz = strlen(trail);
sz = state->offset - numbytes;
if(sz >= tsz)
return 0;
bytes = trail + sz;
sz = tsz - sz;
}
if(sz > bufsize)
sz = bufsize;
memcpy(buffer, bytes, sz);
state->offset += sz;
return sz;
}
/* Readback a mime part. */
static size_t readback_part(struct Curl_mimepart *part,
char *buffer, size_t bufsize)
{
size_t cursize = 0;
size_t sz;
struct curl_slist *hdr;
#ifdef CURL_DOES_CONVERSIONS
char *convbuf = buffer;
#endif
/* Readback from part. */
while(bufsize) {
sz = 0;
hdr = (struct curl_slist *) part->state.ptr;
switch(part->state.state) {
case MIMESTATE_BEGIN:
mimesetstate(&part->state, part->flags & MIME_BODY_ONLY? MIMESTATE_BODY:
MIMESTATE_CURLHEADERS, part->curlheaders);
break;
case MIMESTATE_USERHEADERS:
if(!hdr) {
mimesetstate(&part->state, MIMESTATE_EOH, NULL);
break;
}
if(match_header(hdr, "Content-Type", 12)) {
mimesetstate(&part->state, MIMESTATE_USERHEADERS, hdr->next);
break;
}
/* FALLTHROUGH */
case MIMESTATE_CURLHEADERS:
if(!hdr)
mimesetstate(&part->state, MIMESTATE_USERHEADERS, part->userheaders);
else {
sz = readback_bytes(&part->state, buffer, bufsize,
hdr->data, strlen(hdr->data), "\r\n");
if(!sz)
mimesetstate(&part->state, part->state.state, hdr->next);
}
break;
case MIMESTATE_EOH:
sz = readback_bytes(&part->state, buffer, bufsize, "\r\n", 2, "");
if(!sz)
mimesetstate(&part->state, MIMESTATE_BODY, NULL);
break;
case MIMESTATE_BODY:
#ifdef CURL_DOES_CONVERSIONS
if(part->easy && convbuf < buffer) {
CURLcode result = Curl_convert_to_network(part->easy, convbuf,
buffer - convbuf);
if(result)
return READ_ERROR;
convbuf = buffer;
}
#endif
mimesetstate(&part->state, MIMESTATE_CONTENT, NULL);
break;
case MIMESTATE_CONTENT:
if(part->readfunc)
sz = part->readfunc(buffer, 1, bufsize, part->arg);
switch(sz) {
case 0:
mimesetstate(&part->state, MIMESTATE_END, NULL);
/* Try sparing open file descriptors. */
if(part->kind == MIMEKIND_NAMEDFILE && part->namedfp) {
fclose(part->namedfp);
part->namedfp = NULL;
}
/* FALLTHROUGH */
case CURL_READFUNC_ABORT:
case CURL_READFUNC_PAUSE:
case READ_ERROR:
return cursize? cursize: sz;
}
break;
case MIMESTATE_END:
return cursize;
default:
break; /* Other values not in part state. */
}
/* Bump buffer and counters according to read size. */
cursize += sz;
buffer += sz;
bufsize -= sz;
}
#ifdef CURL_DOES_CONVERSIONS
if(part->easy && convbuf < buffer &&
part->state.state < MIMESTATE_BODY) {
CURLcode result = Curl_convert_to_network(part->easy, convbuf,
buffer - convbuf);
if(result)
return READ_ERROR;
}
#endif
return cursize;
}
/* Readback from mime. */
static size_t mime_subparts_read(char *buffer, size_t size, size_t nitems,
void *instream)
{
struct Curl_mime *mime = (struct Curl_mime *) instream;
size_t cursize = 0;
size_t sz;
struct Curl_mimepart *part;
#ifdef CURL_DOES_CONVERSIONS
char *convbuf = buffer;
#endif
(void) size; /* Always 1. */
while(nitems) {
sz = 0;
part = mime->state.ptr;
switch(mime->state.state) {
case MIMESTATE_BEGIN:
case MIMESTATE_BODY:
#ifdef CURL_DOES_CONVERSIONS
convbuf = buffer;
#endif
mimesetstate(&mime->state, MIMESTATE_BOUNDARY1, mime->firstpart);
/* The first boundary always follows the header termination empty line,
so is always preceded by a CRLK. We can then spare 2 characters
by skipping the leading CRLF in boundary. */
mime->state.offset += 2;
break;
case MIMESTATE_BOUNDARY1:
sz = readback_bytes(&mime->state, buffer, nitems, "\r\n--", 4, "");
if(!sz)
mimesetstate(&mime->state, MIMESTATE_BOUNDARY2, part);
break;
case MIMESTATE_BOUNDARY2:
sz = readback_bytes(&mime->state, buffer, nitems, mime->boundary,
strlen(mime->boundary), part? "\r\n": "--\r\n");
if(!sz) {
#ifdef CURL_DOES_CONVERSIONS
if(mime->easy && convbuf < buffer) {
CURLcode result = Curl_convert_to_network(mime->easy, convbuf,
buffer - convbuf);
if(result)
return READ_ERROR;
convbuf = buffer;
}
#endif
mimesetstate(&mime->state,
part? MIMESTATE_CONTENT: MIMESTATE_END, part);
}
break;
case MIMESTATE_CONTENT:
sz = readback_part(part, buffer, nitems);
switch(sz) {
case CURL_READFUNC_ABORT:
case CURL_READFUNC_PAUSE:
case READ_ERROR:
return cursize? cursize: sz;
case 0:
#ifdef CURL_DOES_CONVERSIONS
convbuf = buffer;
#endif
mimesetstate(&mime->state, MIMESTATE_BOUNDARY1, part->nextpart);
break;
}
break;
case MIMESTATE_END:
return cursize;
default:
break; /* other values not used in mime state. */
}
/* Bump buffer and counters according to read size. */
cursize += sz;
buffer += sz;
nitems -= sz;
}
#ifdef CURL_DOES_CONVERSIONS
if(mime->easy && convbuf < buffer &&
mime->state.state <= MIMESTATE_CONTENT) {
CURLcode result = Curl_convert_to_network(mime->easy, convbuf,
buffer - convbuf);
if(result)
return READ_ERROR;
}
#endif
return cursize;
}
static int mime_part_rewind(struct Curl_mimepart *part)
{
int res = CURL_SEEKFUNC_OK;
enum mimestate targetstate = MIMESTATE_BEGIN;
if(part->flags & MIME_BODY_ONLY)
targetstate = MIMESTATE_BODY;
if(part->state.state > targetstate) {
res = CURL_SEEKFUNC_CANTSEEK;
if(part->seekfunc)
res = part->seekfunc(part->arg, part->origin, SEEK_SET);
}
if(res == CURL_SEEKFUNC_OK)
mimesetstate(&part->state, targetstate, NULL);
return res;
}
static int mime_subparts_seek(void *instream, curl_off_t offset, int whence)
{
struct Curl_mime *mime = (struct Curl_mime *) instream;
struct Curl_mimepart *part;
int result = CURL_SEEKFUNC_OK;
int res;
if(whence != SEEK_SET || offset)
return CURL_SEEKFUNC_CANTSEEK; /* Only support full rewind. */
if(mime->state.state == MIMESTATE_BEGIN)
return CURL_SEEKFUNC_OK; /* Already rewound. */
for(part = mime->firstpart; part; part = part->nextpart) {
res = mime_part_rewind(part);
if(res != CURL_SEEKFUNC_OK)
result = res;
}
if(result == CURL_SEEKFUNC_OK)
mimesetstate(&mime->state, MIMESTATE_BEGIN, NULL);
return result;
}
static void mime_subparts_free(void *ptr)
{
struct Curl_mime *mime = (struct Curl_mime *) ptr;
curl_mime_free(mime);
}
/* Release part content. */
static void cleanup_part_content(struct Curl_mimepart *part)
{
if(part->freefunc)
part->freefunc(part->arg);
part->readfunc = NULL;
part->seekfunc = NULL;
part->freefunc = NULL;
part->arg = NULL;
part->data = NULL;
part->namedfp = NULL;
part->origin = 0;
part->datasize = (curl_off_t) 0; /* No size yet. */
part->kind = MIMEKIND_NONE;
}
void Curl_mime_cleanpart(struct Curl_mimepart *part)
{
cleanup_part_content(part);
curl_slist_free_all(part->curlheaders);
if(part->flags & MIME_USERHEADERS_OWNER)
curl_slist_free_all(part->userheaders);
Curl_safefree(part->mimetype);
Curl_safefree(part->name);
Curl_safefree(part->filename);
Curl_mime_initpart(part, part->easy);
}
/* Recursively delete a mime handle and its parts. */
void curl_mime_free(struct Curl_mime *mime)
{
struct Curl_mimepart *part;
if(mime) {
while(mime->firstpart) {
part = mime->firstpart;
mime->firstpart = part->nextpart;
Curl_mime_cleanpart(part);
free(part);
}
free(mime->boundary);
free(mime);
}
}
/*
* Mime build functions.
*/
/* Create a mime handle. */
struct Curl_mime *curl_mime_init(struct Curl_easy *easy)
{
struct Curl_mime *mime;
mime = (struct Curl_mime *) malloc(sizeof *mime);
if(mime) {
mime->easy = easy;
mime->parent = NULL;
mime->firstpart = NULL;
mime->lastpart = NULL;
/* Get a part boundary. */
mime->boundary = malloc(24 + MIME_RAND_BOUNDARY_CHARS + 1);
if(!mime->boundary) {
free(mime);
return NULL;
}
memset(mime->boundary, '-', 24);
Curl_rand_hex(easy, (unsigned char *) mime->boundary + 24,
MIME_RAND_BOUNDARY_CHARS + 1);
mimesetstate(&mime->state, MIMESTATE_BEGIN, NULL);
}
return mime;
}
/* Initialize a mime part. */
void Curl_mime_initpart(struct Curl_mimepart *part, struct Curl_easy *easy)
{
memset((char *) part, 0, sizeof *part);
part->easy = easy;
mimesetstate(&part->state, MIMESTATE_BEGIN, NULL);
}
/* Create a mime part and append it to a mime handle's part list. */
struct Curl_mimepart *curl_mime_addpart(struct Curl_mime *mime)
{
struct Curl_mimepart *part;
if(!mime)
return NULL;
part = (struct Curl_mimepart *) malloc(sizeof *part);
if(part) {
Curl_mime_initpart(part, mime->easy);
part->parent = mime;
if(mime->lastpart)
mime->lastpart->nextpart = part;
else
mime->firstpart = part;
mime->lastpart = part;
}
return part;
}
/* Set mime part name. */
CURLcode curl_mime_name(struct Curl_mimepart *part,
const char *name, ssize_t namesize)
{
if(!part)
return CURLE_BAD_FUNCTION_ARGUMENT;
Curl_safefree(part->name);
part->name = NULL;
part->namesize = 0;
if(name) {
if(namesize < 0)
namesize = strlen(name);
part->name = malloc(namesize + 1);
if(!part->name)
return CURLE_OUT_OF_MEMORY;
if(namesize)
memcpy(part->name, name, namesize);
part->name[namesize] = '\0';
part->namesize = namesize;
}
return CURLE_OK;
}
/* Set mime part remote file name. */
CURLcode curl_mime_filename(struct Curl_mimepart *part, const char *filename)
{
if(!part)
return CURLE_BAD_FUNCTION_ARGUMENT;
Curl_safefree(part->filename);
part->filename = NULL;
if(filename) {
part->filename = strdup(filename);
if(!part->filename)
return CURLE_OUT_OF_MEMORY;
}
return CURLE_OK;
}
/* Set mime part content from memory data. */
CURLcode curl_mime_data(struct Curl_mimepart *part,
const char *data, ssize_t datasize)
{
if(!part)
return CURLE_BAD_FUNCTION_ARGUMENT;
cleanup_part_content(part);
if(data) {
if(datasize < 0)
datasize = strlen(data);
part->data = malloc(datasize + 1);
if(!part->data)
return CURLE_OUT_OF_MEMORY;
part->datasize = datasize;
if(datasize)
memcpy(part->data, data, datasize);
part->data[datasize] = '\0'; /* Set a nul terminator as sentinel. */
part->readfunc = mime_mem_read;
part->seekfunc = mime_mem_seek;
part->freefunc = mime_mem_free;
part->arg = part;
part->kind = MIMEKIND_DATA;
}
return CURLE_OK;
}
/* Set mime part content from opened file. */
CURLcode Curl_mime_file(struct Curl_mimepart *part,
FILE *fp, int closewhendone)
{
if(!part || !fp)
return CURLE_BAD_FUNCTION_ARGUMENT;
cleanup_part_content(part);
part->arg = fp;
part->readfunc = (curl_read_callback) mime_file_read;
if(closewhendone)
part->freefunc = (curl_free_callback) fclose;
part->origin = ftell(fp);
/* Check if file is seekable and get its size. */
part->datasize = (curl_off_t) -1; /* Unknown size. */
if(!fseek(fp, 0L, SEEK_END)) {
part->datasize = ftell(fp);
if(part->datasize >= 0) {
if(part->datasize < part->origin)
part->datasize = 0;
else
part->datasize -= part->origin;
part->seekfunc = mime_file_seek;
}
fseek(fp, (long) part->origin, SEEK_SET);
}
part->kind = MIMEKIND_FILE;
return CURLE_OK;
}
/* Set mime part content from named local file. */
CURLcode curl_mime_filedata(struct Curl_mimepart *part, const char *filename)
{
CURLcode result = CURLE_OK;
struct_stat sbuf;
char *base;
if(!part || !filename)
return CURLE_BAD_FUNCTION_ARGUMENT;
if(!strcmp(filename, "-"))
return Curl_mime_file(part, stdin, 0);
if(stat(filename, &sbuf) || access(filename, R_OK))
result = CURLE_READ_ERROR;
cleanup_part_content(part);
part->data = strdup(filename);
if(!part->data)
result = CURLE_OUT_OF_MEMORY;
part->datasize = -1;
if(!result && S_ISREG(sbuf.st_mode)) {
part->datasize = filesize(filename, sbuf);
part->seekfunc = mime_namedfile_seek;
}
part->readfunc = mime_namedfile_read;
part->freefunc = mime_namedfile_free;
part->arg = part;
part->kind = MIMEKIND_NAMEDFILE;
/* As a side effect, set the filename to the current file's base name.
It is possible to withdraw this by explicitly calling curl_mime_filename()
with a NULL filename argument after the current call. */
base = strippath(filename);
if(!base)
result = CURLE_OUT_OF_MEMORY;
else {
CURLcode res = curl_mime_filename(part, base);
if(res)
result = res;
free(base);
}
return result;
}
/* Set mime part type. */
CURLcode curl_mime_type(struct Curl_mimepart *part, const char *mimetype)
{
if(!part)
return CURLE_BAD_FUNCTION_ARGUMENT;
Curl_safefree(part->mimetype);
part->mimetype = NULL;
if(mimetype) {
part->mimetype = strdup(mimetype);
if(!part->mimetype)
return CURLE_OUT_OF_MEMORY;
}
return CURLE_OK;
}
/* Set mime data transfer encoder. */
CURLcode curl_mime_encoder(struct Curl_mimepart *part, const char *encoding)
{
CURLcode result = CURLE_OK;
/* Encoding feature not yet implemented. */
if(!part)
return CURLE_BAD_FUNCTION_ARGUMENT;
if(encoding)
return CURLE_BAD_FUNCTION_ARGUMENT;
return result;
}
/* Set mime part headers. */
CURLcode curl_mime_headers(struct Curl_mimepart *part,
struct curl_slist *headers, int take_ownership)
{
if(!part)
return CURLE_BAD_FUNCTION_ARGUMENT;
if(part->flags & MIME_USERHEADERS_OWNER) {
curl_slist_free_all(part->userheaders);
part->flags &= ~MIME_USERHEADERS_OWNER;
}
part->userheaders = headers;
if(headers && take_ownership)
part->flags |= MIME_USERHEADERS_OWNER;
return CURLE_OK;
}
/* Set mime part content from callback. */