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darling-libxml2/xmlIO.c
Daniel Veillard 1b243b4fc9 applied patch from Rob Richards for the per thread I/O mappings Daniel 
* globals.c xmlIO.c include/libxml/globals.h include/libxml/xmlIO.h:
  applied patch from Rob Richards for the per thread I/O mappings
Daniel
2004-06-08 10:16:42 +00:00

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/*
* xmlIO.c : implementation of the I/O interfaces used by the parser
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*
* 14 Nov 2000 ht - for VMS, truncated name of long functions to under 32 char
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
/* Figure a portable way to know if a file is a directory. */
#ifndef HAVE_STAT
# ifdef HAVE__STAT
/* MS C library seems to define stat and _stat. The definition
is identical. Still, mapping them to each other causes a warning. */
# ifndef _MSC_VER
# define stat(x,y) _stat(x,y)
# endif
# define HAVE_STAT
# endif
#endif
#ifdef HAVE_STAT
# ifndef S_ISDIR
# ifdef _S_ISDIR
# define S_ISDIR(x) _S_ISDIR(x)
# else
# ifdef S_IFDIR
# ifndef S_IFMT
# ifdef _S_IFMT
# define S_IFMT _S_IFMT
# endif
# endif
# ifdef S_IFMT
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
# endif
# endif
# endif
# endif
#endif
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlIO.h>
#include <libxml/uri.h>
#include <libxml/nanohttp.h>
#include <libxml/nanoftp.h>
#include <libxml/xmlerror.h>
#ifdef LIBXML_CATALOG_ENABLED
#include <libxml/catalog.h>
#endif
#include <libxml/globals.h>
/* #define VERBOSE_FAILURE */
/* #define DEBUG_EXTERNAL_ENTITIES */
/* #define DEBUG_INPUT */
#ifdef DEBUG_INPUT
#define MINLEN 40
#else
#define MINLEN 4000
#endif
/*
* Input I/O callback sets
*/
typedef struct _xmlInputCallback {
xmlInputMatchCallback matchcallback;
xmlInputOpenCallback opencallback;
xmlInputReadCallback readcallback;
xmlInputCloseCallback closecallback;
} xmlInputCallback;
#define MAX_INPUT_CALLBACK 15
static xmlInputCallback xmlInputCallbackTable[MAX_INPUT_CALLBACK];
static int xmlInputCallbackNr = 0;
static int xmlInputCallbackInitialized = 0;
#ifdef LIBXML_OUTPUT_ENABLED
/*
* Output I/O callback sets
*/
typedef struct _xmlOutputCallback {
xmlOutputMatchCallback matchcallback;
xmlOutputOpenCallback opencallback;
xmlOutputWriteCallback writecallback;
xmlOutputCloseCallback closecallback;
} xmlOutputCallback;
#define MAX_OUTPUT_CALLBACK 15
static xmlOutputCallback xmlOutputCallbackTable[MAX_OUTPUT_CALLBACK];
static int xmlOutputCallbackNr = 0;
static int xmlOutputCallbackInitialized = 0;
#endif /* LIBXML_OUTPUT_ENABLED */
/************************************************************************
* *
* Tree memory error handler *
* *
************************************************************************/
static const char *IOerr[] = {
"Unknown IO error", /* UNKNOWN */
"Permission denied", /* EACCES */
"Resource temporarily unavailable",/* EAGAIN */
"Bad file descriptor", /* EBADF */
"Bad message", /* EBADMSG */
"Resource busy", /* EBUSY */
"Operation canceled", /* ECANCELED */
"No child processes", /* ECHILD */
"Resource deadlock avoided",/* EDEADLK */
"Domain error", /* EDOM */
"File exists", /* EEXIST */
"Bad address", /* EFAULT */
"File too large", /* EFBIG */
"Operation in progress", /* EINPROGRESS */
"Interrupted function call",/* EINTR */
"Invalid argument", /* EINVAL */
"Input/output error", /* EIO */
"Is a directory", /* EISDIR */
"Too many open files", /* EMFILE */
"Too many links", /* EMLINK */
"Inappropriate message buffer length",/* EMSGSIZE */
"Filename too long", /* ENAMETOOLONG */
"Too many open files in system",/* ENFILE */
"No such device", /* ENODEV */
"No such file or directory",/* ENOENT */
"Exec format error", /* ENOEXEC */
"No locks available", /* ENOLCK */
"Not enough space", /* ENOMEM */
"No space left on device", /* ENOSPC */
"Function not implemented", /* ENOSYS */
"Not a directory", /* ENOTDIR */
"Directory not empty", /* ENOTEMPTY */
"Not supported", /* ENOTSUP */
"Inappropriate I/O control operation",/* ENOTTY */
"No such device or address",/* ENXIO */
"Operation not permitted", /* EPERM */
"Broken pipe", /* EPIPE */
"Result too large", /* ERANGE */
"Read-only file system", /* EROFS */
"Invalid seek", /* ESPIPE */
"No such process", /* ESRCH */
"Operation timed out", /* ETIMEDOUT */
"Improper link", /* EXDEV */
"Attempt to load network entity %s", /* XML_IO_NETWORK_ATTEMPT */
"encoder error", /* XML_IO_ENCODER */
"flush error",
"write error",
"no input",
"buffer full",
"loading error",
"not a socket", /* ENOTSOCK */
"already connected", /* EISCONN */
"connection refuxed", /* ECONNREFUSED */
"unreachable network", /* ENETUNREACH */
"adddress in use", /* EADDRINUSE */
"already in use", /* EALREADY */
"unknown address familly", /* EAFNOSUPPORT */
};
/**
* xmlIOErrMemory:
* @extra: extra informations
*
* Handle an out of memory condition
*/
static void
xmlIOErrMemory(const char *extra)
{
__xmlSimpleError(XML_FROM_IO, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}
/**
* __xmlIOErr:
* @code: the error number
* @
* @extra: extra informations
*
* Handle an I/O error
*/
void
__xmlIOErr(int domain, int code, const char *extra)
{
unsigned int idx;
if (code == 0) {
#ifdef HAVE_ERRNO_H
if (errno == 0) code = 0;
#ifdef EACCES
else if (errno == EACCES) code = XML_IO_EACCES;
#endif
#ifdef EAGAIN
else if (errno == EAGAIN) code = XML_IO_EAGAIN;
#endif
#ifdef EBADF
else if (errno == EBADF) code = XML_IO_EBADF;
#endif
#ifdef EBADMSG
else if (errno == EBADMSG) code = XML_IO_EBADMSG;
#endif
#ifdef EBUSY
else if (errno == EBUSY) code = XML_IO_EBUSY;
#endif
#ifdef ECANCELED
else if (errno == ECANCELED) code = XML_IO_ECANCELED;
#endif
#ifdef ECHILD
else if (errno == ECHILD) code = XML_IO_ECHILD;
#endif
#ifdef EDEADLK
else if (errno == EDEADLK) code = XML_IO_EDEADLK;
#endif
#ifdef EDOM
else if (errno == EDOM) code = XML_IO_EDOM;
#endif
#ifdef EEXIST
else if (errno == EEXIST) code = XML_IO_EEXIST;
#endif
#ifdef EFAULT
else if (errno == EFAULT) code = XML_IO_EFAULT;
#endif
#ifdef EFBIG
else if (errno == EFBIG) code = XML_IO_EFBIG;
#endif
#ifdef EINPROGRESS
else if (errno == EINPROGRESS) code = XML_IO_EINPROGRESS;
#endif
#ifdef EINTR
else if (errno == EINTR) code = XML_IO_EINTR;
#endif
#ifdef EINVAL
else if (errno == EINVAL) code = XML_IO_EINVAL;
#endif
#ifdef EIO
else if (errno == EIO) code = XML_IO_EIO;
#endif
#ifdef EISDIR
else if (errno == EISDIR) code = XML_IO_EISDIR;
#endif
#ifdef EMFILE
else if (errno == EMFILE) code = XML_IO_EMFILE;
#endif
#ifdef EMLINK
else if (errno == EMLINK) code = XML_IO_EMLINK;
#endif
#ifdef EMSGSIZE
else if (errno == EMSGSIZE) code = XML_IO_EMSGSIZE;
#endif
#ifdef ENAMETOOLONG
else if (errno == ENAMETOOLONG) code = XML_IO_ENAMETOOLONG;
#endif
#ifdef ENFILE
else if (errno == ENFILE) code = XML_IO_ENFILE;
#endif
#ifdef ENODEV
else if (errno == ENODEV) code = XML_IO_ENODEV;
#endif
#ifdef ENOENT
else if (errno == ENOENT) code = XML_IO_ENOENT;
#endif
#ifdef ENOEXEC
else if (errno == ENOEXEC) code = XML_IO_ENOEXEC;
#endif
#ifdef ENOLCK
else if (errno == ENOLCK) code = XML_IO_ENOLCK;
#endif
#ifdef ENOMEM
else if (errno == ENOMEM) code = XML_IO_ENOMEM;
#endif
#ifdef ENOSPC
else if (errno == ENOSPC) code = XML_IO_ENOSPC;
#endif
#ifdef ENOSYS
else if (errno == ENOSYS) code = XML_IO_ENOSYS;
#endif
#ifdef ENOTDIR
else if (errno == ENOTDIR) code = XML_IO_ENOTDIR;
#endif
#ifdef ENOTEMPTY
else if (errno == ENOTEMPTY) code = XML_IO_ENOTEMPTY;
#endif
#ifdef ENOTSUP
else if (errno == ENOTSUP) code = XML_IO_ENOTSUP;
#endif
#ifdef ENOTTY
else if (errno == ENOTTY) code = XML_IO_ENOTTY;
#endif
#ifdef ENXIO
else if (errno == ENXIO) code = XML_IO_ENXIO;
#endif
#ifdef EPERM
else if (errno == EPERM) code = XML_IO_EPERM;
#endif
#ifdef EPIPE
else if (errno == EPIPE) code = XML_IO_EPIPE;
#endif
#ifdef ERANGE
else if (errno == ERANGE) code = XML_IO_ERANGE;
#endif
#ifdef EROFS
else if (errno == EROFS) code = XML_IO_EROFS;
#endif
#ifdef ESPIPE
else if (errno == ESPIPE) code = XML_IO_ESPIPE;
#endif
#ifdef ESRCH
else if (errno == ESRCH) code = XML_IO_ESRCH;
#endif
#ifdef ETIMEDOUT
else if (errno == ETIMEDOUT) code = XML_IO_ETIMEDOUT;
#endif
#ifdef EXDEV
else if (errno == EXDEV) code = XML_IO_EXDEV;
#endif
#ifdef ENOTSOCK
else if (errno == ENOTSOCK) code = XML_IO_ENOTSOCK;
#endif
#ifdef EISCONN
else if (errno == EISCONN) code = XML_IO_EISCONN;
#endif
#ifdef ECONNREFUSED
else if (errno == ECONNREFUSED) code = XML_IO_ECONNREFUSED;
#endif
#ifdef ETIMEDOUT
else if (errno == ETIMEDOUT) code = XML_IO_ETIMEDOUT;
#endif
#ifdef ENETUNREACH
else if (errno == ENETUNREACH) code = XML_IO_ENETUNREACH;
#endif
#ifdef EADDRINUSE
else if (errno == EADDRINUSE) code = XML_IO_EADDRINUSE;
#endif
#ifdef EINPROGRESS
else if (errno == EINPROGRESS) code = XML_IO_EINPROGRESS;
#endif
#ifdef EALREADY
else if (errno == EALREADY) code = XML_IO_EALREADY;
#endif
#ifdef EAFNOSUPPORT
else if (errno == EAFNOSUPPORT) code = XML_IO_EAFNOSUPPORT;
#endif
else code = XML_IO_UNKNOWN;
#endif /* HAVE_ERRNO_H */
}
idx = 0;
if (code >= XML_IO_UNKNOWN) idx = code - XML_IO_UNKNOWN;
if (idx >= (sizeof(IOerr) / sizeof(IOerr[0]))) idx = 0;
__xmlSimpleError(domain, code, NULL, IOerr[idx], extra);
}
/**
* xmlIOErr:
* @code: the error number
* @extra: extra informations
*
* Handle an I/O error
*/
static void
xmlIOErr(int code, const char *extra)
{
__xmlIOErr(XML_FROM_IO, code, extra);
}
/**
* __xmlLoaderErr:
* @ctx: the parser context
* @extra: extra informations
*
* Handle a resource access error
*/
void
__xmlLoaderErr(void *ctx, const char *msg, const char *filename)
{
xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
xmlStructuredErrorFunc schannel = NULL;
xmlGenericErrorFunc channel = NULL;
void *data = NULL;
xmlErrorLevel level = XML_ERR_ERROR;
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if ((ctxt != NULL) && (ctxt->sax != NULL)) {
if (ctxt->validate) {
channel = ctxt->sax->error;
level = XML_ERR_ERROR;
} else {
channel = ctxt->sax->warning;
level = XML_ERR_WARNING;
}
schannel = ctxt->sax->serror;
data = ctxt->userData;
}
__xmlRaiseError(schannel, channel, data, ctxt, NULL, XML_FROM_IO,
XML_IO_LOAD_ERROR, level, NULL, 0,
filename, NULL, NULL, 0, 0,
msg, filename);
}
/************************************************************************
* *
* Tree memory error handler *
* *
************************************************************************/
/**
* xmlNormalizeWindowsPath:
* @path: the input file path
*
* This function is obsolete. Please see xmlURIFromPath in uri.c for
* a better solution.
*
* Returns a canonicalized version of the path
*/
xmlChar *
xmlNormalizeWindowsPath(const xmlChar *path)
{
return xmlCanonicPath(path);
}
/**
* xmlCleanupInputCallbacks:
*
* clears the entire input callback table. this includes the
* compiled-in I/O.
*/
void
xmlCleanupInputCallbacks(void)
{
int i;
if (!xmlInputCallbackInitialized)
return;
for (i = xmlInputCallbackNr - 1; i >= 0; i--) {
xmlInputCallbackTable[i].matchcallback = NULL;
xmlInputCallbackTable[i].opencallback = NULL;
xmlInputCallbackTable[i].readcallback = NULL;
xmlInputCallbackTable[i].closecallback = NULL;
}
xmlInputCallbackNr = 0;
xmlInputCallbackInitialized = 0;
}
/**
* xmlPopInputCallback:
*
* Clear the top input callback from the input stack. this includes the
* compiled-in I/O.
*
* Returns the number of input callback registered or -1 in case of error.
*/
int
xmlPopInputCallbacks(void)
{
if (!xmlInputCallbackInitialized)
return(-1);
if (xmlInputCallbackNr <= 0)
return(-1);
xmlInputCallbackNr--;
xmlInputCallbackTable[xmlInputCallbackNr].matchcallback = NULL;
xmlInputCallbackTable[xmlInputCallbackNr].opencallback = NULL;
xmlInputCallbackTable[xmlInputCallbackNr].readcallback = NULL;
xmlInputCallbackTable[xmlInputCallbackNr].closecallback = NULL;
return(xmlInputCallbackNr);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlCleanupOutputCallbacks:
*
* clears the entire output callback table. this includes the
* compiled-in I/O callbacks.
*/
void
xmlCleanupOutputCallbacks(void)
{
int i;
if (!xmlOutputCallbackInitialized)
return;
for (i = xmlOutputCallbackNr - 1; i >= 0; i--) {
xmlOutputCallbackTable[i].matchcallback = NULL;
xmlOutputCallbackTable[i].opencallback = NULL;
xmlOutputCallbackTable[i].writecallback = NULL;
xmlOutputCallbackTable[i].closecallback = NULL;
}
xmlOutputCallbackNr = 0;
xmlOutputCallbackInitialized = 0;
}
#endif /* LIBXML_OUTPUT_ENABLED */
/************************************************************************
* *
* Standard I/O for file accesses *
* *
************************************************************************/
/**
* xmlCheckFilename:
* @path: the path to check
*
* function checks to see if @path is a valid source
* (file, socket...) for XML.
*
* if stat is not available on the target machine,
* returns 1. if stat fails, returns 0 (if calling
* stat on the filename fails, it can't be right).
* if stat succeeds and the file is a directory,
* returns 2. otherwise returns 1.
*/
int
xmlCheckFilename (const char *path)
{
#ifdef HAVE_STAT
struct stat stat_buffer;
if (stat(path, &stat_buffer) == -1)
return 0;
#ifdef S_ISDIR
if (S_ISDIR(stat_buffer.st_mode)) {
return 2;
}
#endif
#endif
return 1;
}
static int
xmlNop(void) {
return(0);
}
/**
* xmlFdRead:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to read
*
* Read @len bytes to @buffer from the I/O channel.
*
* Returns the number of bytes written
*/
static int
xmlFdRead (void * context, char * buffer, int len) {
int ret;
ret = read((int) (long) context, &buffer[0], len);
if (ret < 0) xmlIOErr(0, "read()");
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlFdWrite:
* @context: the I/O context
* @buffer: where to get data
* @len: number of bytes to write
*
* Write @len bytes from @buffer to the I/O channel.
*
* Returns the number of bytes written
*/
static int
xmlFdWrite (void * context, const char * buffer, int len) {
int ret;
ret = write((int) (long) context, &buffer[0], len);
if (ret < 0) xmlIOErr(0, "write()");
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlFdClose:
* @context: the I/O context
*
* Close an I/O channel
*
* Returns 0 in case of success and error code otherwise
*/
static int
xmlFdClose (void * context) {
int ret;
ret = close((int) (long) context);
if (ret < 0) xmlIOErr(0, "close()");
return(ret);
}
/**
* xmlFileMatch:
* @filename: the URI for matching
*
* input from FILE *
*
* Returns 1 if matches, 0 otherwise
*/
int
xmlFileMatch (const char *filename ATTRIBUTE_UNUSED) {
return(1);
}
/**
* xmlFileOpen_real:
* @filename: the URI for matching
*
* input from FILE *, supports compressed input
* if @filename is " " then the standard input is used
*
* Returns an I/O context or NULL in case of error
*/
static void *
xmlFileOpen_real (const char *filename) {
const char *path = NULL;
FILE *fd;
if (!strcmp(filename, "-")) {
fd = stdin;
return((void *) fd);
}
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[17];
#else
path = &filename[16];
#endif
else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[8];
#else
path = &filename[7];
#endif
} else
path = filename;
if (path == NULL)
return(NULL);
if (!xmlCheckFilename(path))
return(NULL);
#if defined(WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
fd = fopen(path, "rb");
#else
fd = fopen(path, "r");
#endif /* WIN32 */
if (fd == NULL) xmlIOErr(0, path);
return((void *) fd);
}
/**
* xmlFileOpen:
* @filename: the URI for matching
*
* Wrapper around xmlFileOpen_real that try it with an unescaped
* version of @filename, if this fails fallback to @filename
*
* Returns a handler or NULL in case or failure
*/
void *
xmlFileOpen (const char *filename) {
char *unescaped;
void *retval;
unescaped = xmlURIUnescapeString(filename, 0, NULL);
if (unescaped != NULL) {
retval = xmlFileOpen_real(unescaped);
} else {
retval = xmlFileOpen_real(filename);
}
xmlFree(unescaped);
return retval;
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlFileOpenW:
* @filename: the URI for matching
*
* output to from FILE *,
* if @filename is "-" then the standard output is used
*
* Returns an I/O context or NULL in case of error
*/
static void *
xmlFileOpenW (const char *filename) {
const char *path = NULL;
FILE *fd;
if (!strcmp(filename, "-")) {
fd = stdout;
return((void *) fd);
}
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[17];
#else
path = &filename[16];
#endif
else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[8];
#else
path = &filename[7];
#endif
} else
path = filename;
if (path == NULL)
return(NULL);
fd = fopen(path, "wb");
if (fd == NULL) xmlIOErr(0, path);
return((void *) fd);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlFileRead:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to write
*
* Read @len bytes to @buffer from the I/O channel.
*
* Returns the number of bytes written
*/
int
xmlFileRead (void * context, char * buffer, int len) {
int ret;
ret = fread(&buffer[0], 1, len, (FILE *) context);
if (ret < 0) xmlIOErr(0, "fread()");
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlFileWrite:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to write
*
* Write @len bytes from @buffer to the I/O channel.
*
* Returns the number of bytes written
*/
static int
xmlFileWrite (void * context, const char * buffer, int len) {
int items;
items = fwrite(&buffer[0], len, 1, (FILE *) context);
if ((items == 0) && (ferror((FILE *) context))) {
xmlIOErr(0, "fwrite()");
return(-1);
}
return(items * len);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlFileClose:
* @context: the I/O context
*
* Close an I/O channel
*
* Returns 0 or -1 in case of error
*/
int
xmlFileClose (void * context) {
FILE *fil;
int ret;
fil = (FILE *) context;
if ((fil == stdout) || (fil == stderr)) {
ret = fflush(fil);
if (ret < 0)
xmlIOErr(0, "fflush()");
return(0);
}
if (fil == stdin)
return(0);
ret = ( fclose((FILE *) context) == EOF ) ? -1 : 0;
if (ret < 0)
xmlIOErr(0, "fclose()");
return(ret);
}
/**
* xmlFileFlush:
* @context: the I/O context
*
* Flush an I/O channel
*/
static int
xmlFileFlush (void * context) {
int ret;
ret = ( fflush((FILE *) context) == EOF ) ? -1 : 0;
if (ret < 0)
xmlIOErr(0, "fflush()");
return(ret);
}
#ifdef HAVE_ZLIB_H
/************************************************************************
* *
* I/O for compressed file accesses *
* *
************************************************************************/
/**
* xmlGzfileMatch:
* @filename: the URI for matching
*
* input from compressed file test
*
* Returns 1 if matches, 0 otherwise
*/
static int
xmlGzfileMatch (const char *filename ATTRIBUTE_UNUSED) {
return(1);
}
/**
* xmlGzfileOpen_real:
* @filename: the URI for matching
*
* input from compressed file open
* if @filename is " " then the standard input is used
*
* Returns an I/O context or NULL in case of error
*/
static void *
xmlGzfileOpen_real (const char *filename) {
const char *path = NULL;
gzFile fd;
if (!strcmp(filename, "-")) {
fd = gzdopen(dup(0), "rb");
return((void *) fd);
}
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[17];
#else
path = &filename[16];
#endif
else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[8];
#else
path = &filename[7];
#endif
} else
path = filename;
if (path == NULL)
return(NULL);
if (!xmlCheckFilename(path))
return(NULL);
fd = gzopen(path, "rb");
return((void *) fd);
}
/**
* xmlGzfileOpen:
* @filename: the URI for matching
*
* Wrapper around xmlGzfileOpen if the open fais, it will
* try to unescape @filename
*/
static void *
xmlGzfileOpen (const char *filename) {
char *unescaped;
void *retval;
retval = xmlGzfileOpen_real(filename);
if (retval == NULL) {
unescaped = xmlURIUnescapeString(filename, 0, NULL);
if (unescaped != NULL) {
retval = xmlGzfileOpen_real(unescaped);
}
xmlFree(unescaped);
}
return retval;
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlGzfileOpenW:
* @filename: the URI for matching
* @compression: the compression factor (0 - 9 included)
*
* input from compressed file open
* if @filename is " " then the standard input is used
*
* Returns an I/O context or NULL in case of error
*/
static void *
xmlGzfileOpenW (const char *filename, int compression) {
const char *path = NULL;
char mode[15];
gzFile fd;
snprintf(mode, sizeof(mode), "wb%d", compression);
if (!strcmp(filename, "-")) {
fd = gzdopen(dup(1), mode);
return((void *) fd);
}
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[17];
#else
path = &filename[16];
#endif
else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &filename[8];
#else
path = &filename[7];
#endif
} else
path = filename;
if (path == NULL)
return(NULL);
fd = gzopen(path, mode);
return((void *) fd);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlGzfileRead:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to write
*
* Read @len bytes to @buffer from the compressed I/O channel.
*
* Returns the number of bytes written
*/
static int
xmlGzfileRead (void * context, char * buffer, int len) {
int ret;
ret = gzread((gzFile) context, &buffer[0], len);
if (ret < 0) xmlIOErr(0, "gzread()");
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlGzfileWrite:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to write
*
* Write @len bytes from @buffer to the compressed I/O channel.
*
* Returns the number of bytes written
*/
static int
xmlGzfileWrite (void * context, const char * buffer, int len) {
int ret;
ret = gzwrite((gzFile) context, (char *) &buffer[0], len);
if (ret < 0) xmlIOErr(0, "gzwrite()");
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlGzfileClose:
* @context: the I/O context
*
* Close a compressed I/O channel
*/
static int
xmlGzfileClose (void * context) {
int ret;
ret = (gzclose((gzFile) context) == Z_OK ) ? 0 : -1;
if (ret < 0) xmlIOErr(0, "gzclose()");
return(ret);
}
#endif /* HAVE_ZLIB_H */
#ifdef LIBXML_HTTP_ENABLED
/************************************************************************
* *
* I/O for HTTP file accesses *
* *
************************************************************************/
#ifdef LIBXML_OUTPUT_ENABLED
typedef struct xmlIOHTTPWriteCtxt_
{
int compression;
char * uri;
void * doc_buff;
} xmlIOHTTPWriteCtxt, *xmlIOHTTPWriteCtxtPtr;
#ifdef HAVE_ZLIB_H
#define DFLT_WBITS ( -15 )
#define DFLT_MEM_LVL ( 8 )
#define GZ_MAGIC1 ( 0x1f )
#define GZ_MAGIC2 ( 0x8b )
#define LXML_ZLIB_OS_CODE ( 0x03 )
#define INIT_HTTP_BUFF_SIZE ( 32768 )
#define DFLT_ZLIB_RATIO ( 5 )
/*
** Data structure and functions to work with sending compressed data
** via HTTP.
*/
typedef struct xmlZMemBuff_
{
unsigned long size;
unsigned long crc;
unsigned char * zbuff;
z_stream zctrl;
} xmlZMemBuff, *xmlZMemBuffPtr;
/**
* append_reverse_ulong
* @buff: Compressed memory buffer
* @data: Unsigned long to append
*
* Append a unsigned long in reverse byte order to the end of the
* memory buffer.
*/
static void
append_reverse_ulong( xmlZMemBuff * buff, unsigned long data ) {
int idx;
if ( buff == NULL )
return;
/*
** This is plagiarized from putLong in gzio.c (zlib source) where
** the number "4" is hardcoded. If zlib is ever patched to
** support 64 bit file sizes, this code would need to be patched
** as well.
*/
for ( idx = 0; idx < 4; idx++ ) {
*buff->zctrl.next_out = ( data & 0xff );
data >>= 8;
buff->zctrl.next_out++;
}
return;
}
/**
*
* xmlFreeZMemBuff
* @buff: The memory buffer context to clear
*
* Release all the resources associated with the compressed memory buffer.
*/
static void
xmlFreeZMemBuff( xmlZMemBuffPtr buff ) {
#ifdef DEBUG_HTTP
int z_err;
#endif
if ( buff == NULL )
return;
xmlFree( buff->zbuff );
#ifdef DEBUG_HTTP
z_err = deflateEnd( &buff->zctrl );
if ( z_err != Z_OK )
xmlGenericError( xmlGenericErrorContext,
"xmlFreeZMemBuff: Error releasing zlib context: %d\n",
z_err );
#else
deflateEnd( &buff->zctrl );
#endif
xmlFree( buff );
return;
}
/**
* xmlCreateZMemBuff
*@compression: Compression value to use
*
* Create a memory buffer to hold the compressed XML document. The
* compressed document in memory will end up being identical to what
* would be created if gzopen/gzwrite/gzclose were being used to
* write the document to disk. The code for the header/trailer data to
* the compression is plagiarized from the zlib source files.
*/
static void *
xmlCreateZMemBuff( int compression ) {
int z_err;
int hdr_lgth;
xmlZMemBuffPtr buff = NULL;
if ( ( compression < 1 ) || ( compression > 9 ) )
return ( NULL );
/* Create the control and data areas */
buff = xmlMalloc( sizeof( xmlZMemBuff ) );
if ( buff == NULL ) {
xmlIOErrMemory("creating buffer context");
return ( NULL );
}
(void)memset( buff, 0, sizeof( xmlZMemBuff ) );
buff->size = INIT_HTTP_BUFF_SIZE;
buff->zbuff = xmlMalloc( buff->size );
if ( buff->zbuff == NULL ) {
xmlFreeZMemBuff( buff );
xmlIOErrMemory("creating buffer");
return ( NULL );
}
z_err = deflateInit2( &buff->zctrl, compression, Z_DEFLATED,
DFLT_WBITS, DFLT_MEM_LVL, Z_DEFAULT_STRATEGY );
if ( z_err != Z_OK ) {
xmlChar msg[500];
xmlFreeZMemBuff( buff );
buff = NULL;
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlCreateZMemBuff: %s %d\n",
"Error initializing compression context. ZLIB error:",
z_err );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
return ( NULL );
}
/* Set the header data. The CRC will be needed for the trailer */
buff->crc = crc32( 0L, Z_NULL, 0 );
hdr_lgth = snprintf( (char *)buff->zbuff, buff->size,
"%c%c%c%c%c%c%c%c%c%c",
GZ_MAGIC1, GZ_MAGIC2, Z_DEFLATED,
0, 0, 0, 0, 0, 0, LXML_ZLIB_OS_CODE );
buff->zctrl.next_out = buff->zbuff + hdr_lgth;
buff->zctrl.avail_out = buff->size - hdr_lgth;
return ( buff );
}
/**
* xmlZMemBuffExtend
* @buff: Buffer used to compress and consolidate data.
* @ext_amt: Number of bytes to extend the buffer.
*
* Extend the internal buffer used to store the compressed data by the
* specified amount.
*
* Returns 0 on success or -1 on failure to extend the buffer. On failure
* the original buffer still exists at the original size.
*/
static int
xmlZMemBuffExtend( xmlZMemBuffPtr buff, size_t ext_amt ) {
int rc = -1;
size_t new_size;
size_t cur_used;
unsigned char * tmp_ptr = NULL;
if ( buff == NULL )
return ( -1 );
else if ( ext_amt == 0 )
return ( 0 );
cur_used = buff->zctrl.next_out - buff->zbuff;
new_size = buff->size + ext_amt;
#ifdef DEBUG_HTTP
if ( cur_used > new_size )
xmlGenericError( xmlGenericErrorContext,
"xmlZMemBuffExtend: %s\n%s %d bytes.\n",
"Buffer overwrite detected during compressed memory",
"buffer extension. Overflowed by",
(cur_used - new_size ) );
#endif
tmp_ptr = xmlRealloc( buff->zbuff, new_size );
if ( tmp_ptr != NULL ) {
rc = 0;
buff->size = new_size;
buff->zbuff = tmp_ptr;
buff->zctrl.next_out = tmp_ptr + cur_used;
buff->zctrl.avail_out = new_size - cur_used;
}
else {
xmlChar msg[500];
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlZMemBuffExtend: %s %lu bytes.\n",
"Allocation failure extending output buffer to",
new_size );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
}
return ( rc );
}
/**
* xmlZMemBuffAppend
* @buff: Buffer used to compress and consolidate data
* @src: Uncompressed source content to append to buffer
* @len: Length of source data to append to buffer
*
* Compress and append data to the internal buffer. The data buffer
* will be expanded if needed to store the additional data.
*
* Returns the number of bytes appended to the buffer or -1 on error.
*/
static int
xmlZMemBuffAppend( xmlZMemBuffPtr buff, const char * src, int len ) {
int z_err;
size_t min_accept;
if ( ( buff == NULL ) || ( src == NULL ) )
return ( -1 );
buff->zctrl.avail_in = len;
buff->zctrl.next_in = (unsigned char *)src;
while ( buff->zctrl.avail_in > 0 ) {
/*
** Extend the buffer prior to deflate call if a reasonable amount
** of output buffer space is not available.
*/
min_accept = buff->zctrl.avail_in / DFLT_ZLIB_RATIO;
if ( buff->zctrl.avail_out <= min_accept ) {
if ( xmlZMemBuffExtend( buff, buff->size ) == -1 )
return ( -1 );
}
z_err = deflate( &buff->zctrl, Z_NO_FLUSH );
if ( z_err != Z_OK ) {
xmlChar msg[500];
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlZMemBuffAppend: %s %d %s - %d",
"Compression error while appending",
len, "bytes to buffer. ZLIB error", z_err );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
return ( -1 );
}
}
buff->crc = crc32( buff->crc, (unsigned char *)src, len );
return ( len );
}
/**
* xmlZMemBuffGetContent
* @buff: Compressed memory content buffer
* @data_ref: Pointer reference to point to compressed content
*
* Flushes the compression buffers, appends gzip file trailers and
* returns the compressed content and length of the compressed data.
* NOTE: The gzip trailer code here is plagiarized from zlib source.
*
* Returns the length of the compressed data or -1 on error.
*/
static int
xmlZMemBuffGetContent( xmlZMemBuffPtr buff, char ** data_ref ) {
int zlgth = -1;
int z_err;
if ( ( buff == NULL ) || ( data_ref == NULL ) )
return ( -1 );
/* Need to loop until compression output buffers are flushed */
do
{
z_err = deflate( &buff->zctrl, Z_FINISH );
if ( z_err == Z_OK ) {
/* In this case Z_OK means more buffer space needed */
if ( xmlZMemBuffExtend( buff, buff->size ) == -1 )
return ( -1 );
}
}
while ( z_err == Z_OK );
/* If the compression state is not Z_STREAM_END, some error occurred */
if ( z_err == Z_STREAM_END ) {
/* Need to append the gzip data trailer */
if ( buff->zctrl.avail_out < ( 2 * sizeof( unsigned long ) ) ) {
if ( xmlZMemBuffExtend(buff, (2 * sizeof(unsigned long))) == -1 )
return ( -1 );
}
/*
** For whatever reason, the CRC and length data are pushed out
** in reverse byte order. So a memcpy can't be used here.
*/
append_reverse_ulong( buff, buff->crc );
append_reverse_ulong( buff, buff->zctrl.total_in );
zlgth = buff->zctrl.next_out - buff->zbuff;
*data_ref = (char *)buff->zbuff;
}
else {
xmlChar msg[500];
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlZMemBuffGetContent: %s - %d\n",
"Error flushing zlib buffers. Error code", z_err );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
}
return ( zlgth );
}
#endif /* LIBXML_OUTPUT_ENABLED */
#endif /* HAVE_ZLIB_H */
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlFreeHTTPWriteCtxt
* @ctxt: Context to cleanup
*
* Free allocated memory and reclaim system resources.
*
* No return value.
*/
static void
xmlFreeHTTPWriteCtxt( xmlIOHTTPWriteCtxtPtr ctxt )
{
if ( ctxt->uri != NULL )
xmlFree( ctxt->uri );
if ( ctxt->doc_buff != NULL ) {
#ifdef HAVE_ZLIB_H
if ( ctxt->compression > 0 ) {
xmlFreeZMemBuff( ctxt->doc_buff );
}
else
#endif
{
xmlOutputBufferClose( ctxt->doc_buff );
}
}
xmlFree( ctxt );
return;
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlIOHTTPMatch:
* @filename: the URI for matching
*
* check if the URI matches an HTTP one
*
* Returns 1 if matches, 0 otherwise
*/
int
xmlIOHTTPMatch (const char *filename) {
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "http://", 7))
return(1);
return(0);
}
/**
* xmlIOHTTPOpen:
* @filename: the URI for matching
*
* open an HTTP I/O channel
*
* Returns an I/O context or NULL in case of error
*/
void *
xmlIOHTTPOpen (const char *filename) {
return(xmlNanoHTTPOpen(filename, NULL));
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlIOHTTPOpenW:
* @post_uri: The destination URI for the document
* @compression: The compression desired for the document.
*
* Open a temporary buffer to collect the document for a subsequent HTTP POST
* request. Non-static as is called from the output buffer creation routine.
*
* Returns an I/O context or NULL in case of error.
*/
void *
xmlIOHTTPOpenW(const char *post_uri, int compression)
{
xmlIOHTTPWriteCtxtPtr ctxt = NULL;
if (post_uri == NULL)
return (NULL);
ctxt = xmlMalloc(sizeof(xmlIOHTTPWriteCtxt));
if (ctxt == NULL) {
xmlIOErrMemory("creating HTTP output context");
return (NULL);
}
(void) memset(ctxt, 0, sizeof(xmlIOHTTPWriteCtxt));
ctxt->uri = (char *) xmlStrdup((const xmlChar *)post_uri);
if (ctxt->uri == NULL) {
xmlIOErrMemory("copying URI");
xmlFreeHTTPWriteCtxt(ctxt);
return (NULL);
}
/*
* ** Since the document length is required for an HTTP post,
* ** need to put the document into a buffer. A memory buffer
* ** is being used to avoid pushing the data to disk and back.
*/
#ifdef HAVE_ZLIB_H
if ((compression > 0) && (compression <= 9)) {
ctxt->compression = compression;
ctxt->doc_buff = xmlCreateZMemBuff(compression);
} else
#endif
{
/* Any character conversions should have been done before this */
ctxt->doc_buff = xmlAllocOutputBuffer(NULL);
}
if (ctxt->doc_buff == NULL) {
xmlFreeHTTPWriteCtxt(ctxt);
ctxt = NULL;
}
return (ctxt);
}
#endif /* LIBXML_OUTPUT_ENABLED */
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlIOHTTPDfltOpenW
* @post_uri: The destination URI for this document.
*
* Calls xmlIOHTTPOpenW with no compression to set up for a subsequent
* HTTP post command. This function should generally not be used as
* the open callback is short circuited in xmlOutputBufferCreateFile.
*
* Returns a pointer to the new IO context.
*/
static void *
xmlIOHTTPDfltOpenW( const char * post_uri ) {
return ( xmlIOHTTPOpenW( post_uri, 0 ) );
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlIOHTTPRead:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to write
*
* Read @len bytes to @buffer from the I/O channel.
*
* Returns the number of bytes written
*/
int
xmlIOHTTPRead(void * context, char * buffer, int len) {
return(xmlNanoHTTPRead(context, &buffer[0], len));
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlIOHTTPWrite
* @context: previously opened writing context
* @buffer: data to output to temporary buffer
* @len: bytes to output
*
* Collect data from memory buffer into a temporary file for later
* processing.
*
* Returns number of bytes written.
*/
static int
xmlIOHTTPWrite( void * context, const char * buffer, int len ) {
xmlIOHTTPWriteCtxtPtr ctxt = context;
if ( ( ctxt == NULL ) || ( ctxt->doc_buff == NULL ) || ( buffer == NULL ) )
return ( -1 );
if ( len > 0 ) {
/* Use gzwrite or fwrite as previously setup in the open call */
#ifdef HAVE_ZLIB_H
if ( ctxt->compression > 0 )
len = xmlZMemBuffAppend( ctxt->doc_buff, buffer, len );
else
#endif
len = xmlOutputBufferWrite( ctxt->doc_buff, len, buffer );
if ( len < 0 ) {
xmlChar msg[500];
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlIOHTTPWrite: %s\n%s '%s'.\n",
"Error appending to internal buffer.",
"Error sending document to URI",
ctxt->uri );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
}
}
return ( len );
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlIOHTTPClose:
* @context: the I/O context
*
* Close an HTTP I/O channel
*
* Returns 0
*/
int
xmlIOHTTPClose (void * context) {
xmlNanoHTTPClose(context);
return 0;
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlIOHTTCloseWrite
* @context: The I/O context
* @http_mthd: The HTTP method to be used when sending the data
*
* Close the transmit HTTP I/O channel and actually send the data.
*/
static int
xmlIOHTTPCloseWrite( void * context, const char * http_mthd ) {
int close_rc = -1;
int http_rtn = 0;
int content_lgth = 0;
xmlIOHTTPWriteCtxtPtr ctxt = context;
char * http_content = NULL;
char * content_encoding = NULL;
char * content_type = (char *) "text/xml";
void * http_ctxt = NULL;
if ( ( ctxt == NULL ) || ( http_mthd == NULL ) )
return ( -1 );
/* Retrieve the content from the appropriate buffer */
#ifdef HAVE_ZLIB_H
if ( ctxt->compression > 0 ) {
content_lgth = xmlZMemBuffGetContent( ctxt->doc_buff, &http_content );
content_encoding = (char *) "Content-Encoding: gzip";
}
else
#endif
{
/* Pull the data out of the memory output buffer */
xmlOutputBufferPtr dctxt = ctxt->doc_buff;
http_content = (char *)dctxt->buffer->content;
content_lgth = dctxt->buffer->use;
}
if ( http_content == NULL ) {
xmlChar msg[500];
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlIOHTTPCloseWrite: %s '%s' %s '%s'.\n",
"Error retrieving content.\nUnable to",
http_mthd, "data to URI", ctxt->uri );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
}
else {
http_ctxt = xmlNanoHTTPMethod( ctxt->uri, http_mthd, http_content,
&content_type, content_encoding,
content_lgth );
if ( http_ctxt != NULL ) {
#ifdef DEBUG_HTTP
/* If testing/debugging - dump reply with request content */
FILE * tst_file = NULL;
char buffer[ 4096 ];
char * dump_name = NULL;
int avail;
xmlGenericError( xmlGenericErrorContext,
"xmlNanoHTTPCloseWrite: HTTP %s to\n%s returned %d.\n",
http_mthd, ctxt->uri,
xmlNanoHTTPReturnCode( http_ctxt ) );
/*
** Since either content or reply may be gzipped,
** dump them to separate files instead of the
** standard error context.
*/
dump_name = tempnam( NULL, "lxml" );
if ( dump_name != NULL ) {
(void)snprintf( buffer, sizeof(buffer), "%s.content", dump_name );
tst_file = fopen( buffer, "wb" );
if ( tst_file != NULL ) {
xmlGenericError( xmlGenericErrorContext,
"Transmitted content saved in file: %s\n", buffer );
fwrite( http_content, sizeof( char ),
content_lgth, tst_file );
fclose( tst_file );
}
(void)snprintf( buffer, sizeof(buffer), "%s.reply", dump_name );
tst_file = fopen( buffer, "wb" );
if ( tst_file != NULL ) {
xmlGenericError( xmlGenericErrorContext,
"Reply content saved in file: %s\n", buffer );
while ( (avail = xmlNanoHTTPRead( http_ctxt,
buffer, sizeof( buffer ) )) > 0 ) {
fwrite( buffer, sizeof( char ), avail, tst_file );
}
fclose( tst_file );
}
free( dump_name );
}
#endif /* DEBUG_HTTP */
http_rtn = xmlNanoHTTPReturnCode( http_ctxt );
if ( ( http_rtn >= 200 ) && ( http_rtn < 300 ) )
close_rc = 0;
else {
xmlChar msg[500];
xmlStrPrintf(msg, 500,
(const xmlChar *) "xmlIOHTTPCloseWrite: HTTP '%s' of %d %s\n'%s' %s %d\n",
http_mthd, content_lgth,
"bytes to URI", ctxt->uri,
"failed. HTTP return code:", http_rtn );
xmlIOErr(XML_IO_WRITE, (const char *) msg);
}
xmlNanoHTTPClose( http_ctxt );
xmlFree( content_type );
}
}
/* Final cleanups */
xmlFreeHTTPWriteCtxt( ctxt );
return ( close_rc );
}
/**
* xmlIOHTTPClosePut
*
* @context: The I/O context
*
* Close the transmit HTTP I/O channel and actually send data using a PUT
* HTTP method.
*/
static int
xmlIOHTTPClosePut( void * ctxt ) {
return ( xmlIOHTTPCloseWrite( ctxt, "PUT" ) );
}
/**
* xmlIOHTTPClosePost
*
* @context: The I/O context
*
* Close the transmit HTTP I/O channel and actually send data using a POST
* HTTP method.
*/
static int
xmlIOHTTPClosePost( void * ctxt ) {
return ( xmlIOHTTPCloseWrite( ctxt, "POST" ) );
}
#endif /* LIBXML_OUTPUT_ENABLED */
#endif /* LIBXML_HTTP_ENABLED */
#ifdef LIBXML_FTP_ENABLED
/************************************************************************
* *
* I/O for FTP file accesses *
* *
************************************************************************/
/**
* xmlIOFTPMatch:
* @filename: the URI for matching
*
* check if the URI matches an FTP one
*
* Returns 1 if matches, 0 otherwise
*/
int
xmlIOFTPMatch (const char *filename) {
if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "ftp://", 6))
return(1);
return(0);
}
/**
* xmlIOFTPOpen:
* @filename: the URI for matching
*
* open an FTP I/O channel
*
* Returns an I/O context or NULL in case of error
*/
void *
xmlIOFTPOpen (const char *filename) {
return(xmlNanoFTPOpen(filename));
}
/**
* xmlIOFTPRead:
* @context: the I/O context
* @buffer: where to drop data
* @len: number of bytes to write
*
* Read @len bytes to @buffer from the I/O channel.
*
* Returns the number of bytes written
*/
int
xmlIOFTPRead(void * context, char * buffer, int len) {
return(xmlNanoFTPRead(context, &buffer[0], len));
}
/**
* xmlIOFTPClose:
* @context: the I/O context
*
* Close an FTP I/O channel
*
* Returns 0
*/
int
xmlIOFTPClose (void * context) {
return ( xmlNanoFTPClose(context) );
}
#endif /* LIBXML_FTP_ENABLED */
/**
* xmlRegisterInputCallbacks:
* @matchFunc: the xmlInputMatchCallback
* @openFunc: the xmlInputOpenCallback
* @readFunc: the xmlInputReadCallback
* @closeFunc: the xmlInputCloseCallback
*
* Register a new set of I/O callback for handling parser input.
*
* Returns the registered handler number or -1 in case of error
*/
int
xmlRegisterInputCallbacks(xmlInputMatchCallback matchFunc,
xmlInputOpenCallback openFunc, xmlInputReadCallback readFunc,
xmlInputCloseCallback closeFunc) {
if (xmlInputCallbackNr >= MAX_INPUT_CALLBACK) {
return(-1);
}
xmlInputCallbackTable[xmlInputCallbackNr].matchcallback = matchFunc;
xmlInputCallbackTable[xmlInputCallbackNr].opencallback = openFunc;
xmlInputCallbackTable[xmlInputCallbackNr].readcallback = readFunc;
xmlInputCallbackTable[xmlInputCallbackNr].closecallback = closeFunc;
xmlInputCallbackInitialized = 1;
return(xmlInputCallbackNr++);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlRegisterOutputCallbacks:
* @matchFunc: the xmlOutputMatchCallback
* @openFunc: the xmlOutputOpenCallback
* @writeFunc: the xmlOutputWriteCallback
* @closeFunc: the xmlOutputCloseCallback
*
* Register a new set of I/O callback for handling output.
*
* Returns the registered handler number or -1 in case of error
*/
int
xmlRegisterOutputCallbacks(xmlOutputMatchCallback matchFunc,
xmlOutputOpenCallback openFunc, xmlOutputWriteCallback writeFunc,
xmlOutputCloseCallback closeFunc) {
if (xmlOutputCallbackNr >= MAX_INPUT_CALLBACK) {
return(-1);
}
xmlOutputCallbackTable[xmlOutputCallbackNr].matchcallback = matchFunc;
xmlOutputCallbackTable[xmlOutputCallbackNr].opencallback = openFunc;
xmlOutputCallbackTable[xmlOutputCallbackNr].writecallback = writeFunc;
xmlOutputCallbackTable[xmlOutputCallbackNr].closecallback = closeFunc;
xmlOutputCallbackInitialized = 1;
return(xmlOutputCallbackNr++);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlRegisterDefaultInputCallbacks:
*
* Registers the default compiled-in I/O handlers.
*/
void
xmlRegisterDefaultInputCallbacks
(void) {
if (xmlInputCallbackInitialized)
return;
xmlRegisterInputCallbacks(xmlFileMatch, xmlFileOpen,
xmlFileRead, xmlFileClose);
#ifdef HAVE_ZLIB_H
xmlRegisterInputCallbacks(xmlGzfileMatch, xmlGzfileOpen,
xmlGzfileRead, xmlGzfileClose);
#endif /* HAVE_ZLIB_H */
#ifdef LIBXML_HTTP_ENABLED
xmlRegisterInputCallbacks(xmlIOHTTPMatch, xmlIOHTTPOpen,
xmlIOHTTPRead, xmlIOHTTPClose);
#endif /* LIBXML_HTTP_ENABLED */
#ifdef LIBXML_FTP_ENABLED
xmlRegisterInputCallbacks(xmlIOFTPMatch, xmlIOFTPOpen,
xmlIOFTPRead, xmlIOFTPClose);
#endif /* LIBXML_FTP_ENABLED */
xmlInputCallbackInitialized = 1;
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlRegisterDefaultOutputCallbacks:
*
* Registers the default compiled-in I/O handlers.
*/
void
xmlRegisterDefaultOutputCallbacks
(void) {
if (xmlOutputCallbackInitialized)
return;
xmlRegisterOutputCallbacks(xmlFileMatch, xmlFileOpenW,
xmlFileWrite, xmlFileClose);
#ifdef LIBXML_HTTP_ENABLED
xmlRegisterOutputCallbacks(xmlIOHTTPMatch, xmlIOHTTPDfltOpenW,
xmlIOHTTPWrite, xmlIOHTTPClosePut);
#endif
/*********************************
No way a-priori to distinguish between gzipped files from
uncompressed ones except opening if existing then closing
and saving with same compression ratio ... a pain.
#ifdef HAVE_ZLIB_H
xmlRegisterOutputCallbacks(xmlGzfileMatch, xmlGzfileOpen,
xmlGzfileWrite, xmlGzfileClose);
#endif
Nor FTP PUT ....
#ifdef LIBXML_FTP_ENABLED
xmlRegisterOutputCallbacks(xmlIOFTPMatch, xmlIOFTPOpen,
xmlIOFTPWrite, xmlIOFTPClose);
#endif
**********************************/
xmlOutputCallbackInitialized = 1;
}
#ifdef LIBXML_HTTP_ENABLED
/**
* xmlRegisterHTTPPostCallbacks:
*
* By default, libxml submits HTTP output requests using the "PUT" method.
* Calling this method changes the HTTP output method to use the "POST"
* method instead.
*
*/
void
xmlRegisterHTTPPostCallbacks( void ) {
/* Register defaults if not done previously */
if ( xmlOutputCallbackInitialized == 0 )
xmlRegisterDefaultOutputCallbacks( );
xmlRegisterOutputCallbacks(xmlIOHTTPMatch, xmlIOHTTPDfltOpenW,
xmlIOHTTPWrite, xmlIOHTTPClosePost);
return;
}
#endif
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlAllocParserInputBuffer:
* @enc: the charset encoding if known
*
* Create a buffered parser input for progressive parsing
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlAllocParserInputBuffer(xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
ret = (xmlParserInputBufferPtr) xmlMalloc(sizeof(xmlParserInputBuffer));
if (ret == NULL) {
xmlIOErrMemory("creating input buffer");
return(NULL);
}
memset(ret, 0, (size_t) sizeof(xmlParserInputBuffer));
ret->buffer = xmlBufferCreateSize(2 * xmlDefaultBufferSize);
if (ret->buffer == NULL) {
xmlFree(ret);
return(NULL);
}
ret->buffer->alloc = XML_BUFFER_ALLOC_DOUBLEIT;
ret->encoder = xmlGetCharEncodingHandler(enc);
if (ret->encoder != NULL)
ret->raw = xmlBufferCreateSize(2 * xmlDefaultBufferSize);
else
ret->raw = NULL;
ret->readcallback = NULL;
ret->closecallback = NULL;
ret->context = NULL;
ret->compressed = -1;
ret->rawconsumed = 0;
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlAllocOutputBuffer:
* @encoder: the encoding converter or NULL
*
* Create a buffered parser output
*
* Returns the new parser output or NULL
*/
xmlOutputBufferPtr
xmlAllocOutputBuffer(xmlCharEncodingHandlerPtr encoder) {
xmlOutputBufferPtr ret;
ret = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));
if (ret == NULL) {
xmlIOErrMemory("creating output buffer");
return(NULL);
}
memset(ret, 0, (size_t) sizeof(xmlOutputBuffer));
ret->buffer = xmlBufferCreate();
if (ret->buffer == NULL) {
xmlFree(ret);
return(NULL);
}
ret->buffer->alloc = XML_BUFFER_ALLOC_DOUBLEIT;
ret->encoder = encoder;
if (encoder != NULL) {
ret->conv = xmlBufferCreateSize(4000);
/*
* This call is designed to initiate the encoder state
*/
xmlCharEncOutFunc(encoder, ret->conv, NULL);
} else
ret->conv = NULL;
ret->writecallback = NULL;
ret->closecallback = NULL;
ret->context = NULL;
ret->written = 0;
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlFreeParserInputBuffer:
* @in: a buffered parser input
*
* Free up the memory used by a buffered parser input
*/
void
xmlFreeParserInputBuffer(xmlParserInputBufferPtr in) {
if (in == NULL) return;
if (in->raw) {
xmlBufferFree(in->raw);
in->raw = NULL;
}
if (in->encoder != NULL) {
xmlCharEncCloseFunc(in->encoder);
}
if (in->closecallback != NULL) {
in->closecallback(in->context);
}
if (in->buffer != NULL) {
xmlBufferFree(in->buffer);
in->buffer = NULL;
}
xmlFree(in);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlOutputBufferClose:
* @out: a buffered output
*
* flushes and close the output I/O channel
* and free up all the associated resources
*
* Returns the number of byte written or -1 in case of error.
*/
int
xmlOutputBufferClose(xmlOutputBufferPtr out)
{
int written;
int err_rc = 0;
if (out == NULL)
return (-1);
if (out->writecallback != NULL)
xmlOutputBufferFlush(out);
if (out->closecallback != NULL) {
err_rc = out->closecallback(out->context);
}
written = out->written;
if (out->conv) {
xmlBufferFree(out->conv);
out->conv = NULL;
}
if (out->encoder != NULL) {
xmlCharEncCloseFunc(out->encoder);
}
if (out->buffer != NULL) {
xmlBufferFree(out->buffer);
out->buffer = NULL;
}
if (out->error)
err_rc = -1;
xmlFree(out);
return ((err_rc == 0) ? written : err_rc);
}
#endif /* LIBXML_OUTPUT_ENABLED */
xmlParserInputBufferPtr
__xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
int i = 0;
void *context = NULL;
if (xmlInputCallbackInitialized == 0)
xmlRegisterDefaultInputCallbacks();
if (URI == NULL) return(NULL);
/*
* Try to find one of the input accept method accepting that scheme
* Go in reverse to give precedence to user defined handlers.
*/
if (context == NULL) {
for (i = xmlInputCallbackNr - 1;i >= 0;i--) {
if ((xmlInputCallbackTable[i].matchcallback != NULL) &&
(xmlInputCallbackTable[i].matchcallback(URI) != 0)) {
context = xmlInputCallbackTable[i].opencallback(URI);
if (context != NULL) {
break;
}
}
}
}
if (context == NULL) {
return(NULL);
}
/*
* Allocate the Input buffer front-end.
*/
ret = xmlAllocParserInputBuffer(enc);
if (ret != NULL) {
ret->context = context;
ret->readcallback = xmlInputCallbackTable[i].readcallback;
ret->closecallback = xmlInputCallbackTable[i].closecallback;
#ifdef HAVE_ZLIB_H
if ((xmlInputCallbackTable[i].opencallback == xmlGzfileOpen) &&
(strcmp(URI, "-") != 0)) {
if (((z_stream *)context)->avail_in > 4) {
char *cptr, buff4[4];
cptr = (char *) ((z_stream *)context)->next_in;
if (gzread(context, buff4, 4) == 4) {
if (strncmp(buff4, cptr, 4) == 0)
ret->compressed = 0;
else
ret->compressed = 1;
gzrewind(context);
}
}
}
#endif
}
return(ret);
}
/**
* xmlParserInputBufferCreateFilename:
* @URI: a C string containing the URI or filename
* @enc: the charset encoding if known
*
* Create a buffered parser input for the progressive parsing of a file
* If filename is "-' then we use stdin as the input.
* Automatic support for ZLIB/Compress compressed document is provided
* by default if found at compile-time.
* Do an encoding check if enc == XML_CHAR_ENCODING_NONE
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) {
if ((xmlParserInputBufferCreateFilenameValue)) {
return xmlParserInputBufferCreateFilenameValue(URI, enc);
}
return __xmlParserInputBufferCreateFilename(URI, enc);
}
#ifdef LIBXML_OUTPUT_ENABLED
xmlOutputBufferPtr
__xmlOutputBufferCreateFilename(const char *URI,
xmlCharEncodingHandlerPtr encoder,
int compression ATTRIBUTE_UNUSED) {
xmlOutputBufferPtr ret;
xmlURIPtr puri;
int i = 0;
void *context = NULL;
char *unescaped = NULL;
int is_file_uri = 1;
if (xmlOutputCallbackInitialized == 0)
xmlRegisterDefaultOutputCallbacks();
if (URI == NULL) return(NULL);
puri = xmlParseURI(URI);
if (puri != NULL) {
if ((puri->scheme != NULL) &&
(!xmlStrEqual(BAD_CAST puri->scheme, BAD_CAST "file")))
is_file_uri = 0;
/*
* try to limit the damages of the URI unescaping code.
*/
if (puri->scheme != NULL)
unescaped = xmlURIUnescapeString(URI, 0, NULL);
xmlFreeURI(puri);
}
/*
* Try to find one of the output accept method accepting that scheme
* Go in reverse to give precedence to user defined handlers.
* try with an unescaped version of the URI
*/
if (unescaped != NULL) {
#ifdef HAVE_ZLIB_H
if ((compression > 0) && (compression <= 9) && (is_file_uri == 1)) {
context = xmlGzfileOpenW(unescaped, compression);
if (context != NULL) {
ret = xmlAllocOutputBuffer(encoder);
if (ret != NULL) {
ret->context = context;
ret->writecallback = xmlGzfileWrite;
ret->closecallback = xmlGzfileClose;
}
xmlFree(unescaped);
return(ret);
}
}
#endif
for (i = xmlOutputCallbackNr - 1;i >= 0;i--) {
if ((xmlOutputCallbackTable[i].matchcallback != NULL) &&
(xmlOutputCallbackTable[i].matchcallback(unescaped) != 0)) {
#if defined(LIBXML_HTTP_ENABLED) && defined(HAVE_ZLIB_H)
/* Need to pass compression parameter into HTTP open calls */
if (xmlOutputCallbackTable[i].matchcallback == xmlIOHTTPMatch)
context = xmlIOHTTPOpenW(unescaped, compression);
else
#endif
context = xmlOutputCallbackTable[i].opencallback(unescaped);
if (context != NULL)
break;
}
}
xmlFree(unescaped);
}
/*
* If this failed try with a non-escaped URI this may be a strange
* filename
*/
if (context == NULL) {
#ifdef HAVE_ZLIB_H
if ((compression > 0) && (compression <= 9) && (is_file_uri == 1)) {
context = xmlGzfileOpenW(URI, compression);
if (context != NULL) {
ret = xmlAllocOutputBuffer(encoder);
if (ret != NULL) {
ret->context = context;
ret->writecallback = xmlGzfileWrite;
ret->closecallback = xmlGzfileClose;
}
return(ret);
}
}
#endif
for (i = xmlOutputCallbackNr - 1;i >= 0;i--) {
if ((xmlOutputCallbackTable[i].matchcallback != NULL) &&
(xmlOutputCallbackTable[i].matchcallback(URI) != 0)) {
#if defined(LIBXML_HTTP_ENABLED) && defined(HAVE_ZLIB_H)
/* Need to pass compression parameter into HTTP open calls */
if (xmlOutputCallbackTable[i].matchcallback == xmlIOHTTPMatch)
context = xmlIOHTTPOpenW(URI, compression);
else
#endif
context = xmlOutputCallbackTable[i].opencallback(URI);
if (context != NULL)
break;
}
}
}
if (context == NULL) {
return(NULL);
}
/*
* Allocate the Output buffer front-end.
*/
ret = xmlAllocOutputBuffer(encoder);
if (ret != NULL) {
ret->context = context;
ret->writecallback = xmlOutputCallbackTable[i].writecallback;
ret->closecallback = xmlOutputCallbackTable[i].closecallback;
}
return(ret);
}
/**
* xmlOutputBufferCreateFilename:
* @URI: a C string containing the URI or filename
* @encoder: the encoding converter or NULL
* @compression: the compression ration (0 none, 9 max).
*
* Create a buffered output for the progressive saving of a file
* If filename is "-' then we use stdout as the output.
* Automatic support for ZLIB/Compress compressed document is provided
* by default if found at compile-time.
* TODO: currently if compression is set, the library only support
* writing to a local file.
*
* Returns the new output or NULL
*/
xmlOutputBufferPtr
xmlOutputBufferCreateFilename(const char *URI,
xmlCharEncodingHandlerPtr encoder,
int compression ATTRIBUTE_UNUSED) {
if ((xmlOutputBufferCreateFilenameValue)) {
return xmlOutputBufferCreateFilenameValue(URI, encoder, compression);
}
return __xmlOutputBufferCreateFilename(URI, encoder, compression);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlParserInputBufferCreateFile:
* @file: a FILE*
* @enc: the charset encoding if known
*
* Create a buffered parser input for the progressive parsing of a FILE *
* buffered C I/O
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlParserInputBufferCreateFile(FILE *file, xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
if (xmlInputCallbackInitialized == 0)
xmlRegisterDefaultInputCallbacks();
if (file == NULL) return(NULL);
ret = xmlAllocParserInputBuffer(enc);
if (ret != NULL) {
ret->context = file;
ret->readcallback = xmlFileRead;
ret->closecallback = xmlFileFlush;
}
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlOutputBufferCreateFile:
* @file: a FILE*
* @encoder: the encoding converter or NULL
*
* Create a buffered output for the progressive saving to a FILE *
* buffered C I/O
*
* Returns the new parser output or NULL
*/
xmlOutputBufferPtr
xmlOutputBufferCreateFile(FILE *file, xmlCharEncodingHandlerPtr encoder) {
xmlOutputBufferPtr ret;
if (xmlOutputCallbackInitialized == 0)
xmlRegisterDefaultOutputCallbacks();
if (file == NULL) return(NULL);
ret = xmlAllocOutputBuffer(encoder);
if (ret != NULL) {
ret->context = file;
ret->writecallback = xmlFileWrite;
ret->closecallback = xmlFileFlush;
}
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlParserInputBufferCreateFd:
* @fd: a file descriptor number
* @enc: the charset encoding if known
*
* Create a buffered parser input for the progressive parsing for the input
* from a file descriptor
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlParserInputBufferCreateFd(int fd, xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
if (fd < 0) return(NULL);
ret = xmlAllocParserInputBuffer(enc);
if (ret != NULL) {
ret->context = (void *) (long) fd;
ret->readcallback = xmlFdRead;
ret->closecallback = xmlFdClose;
}
return(ret);
}
/**
* xmlParserInputBufferCreateMem:
* @mem: the memory input
* @size: the length of the memory block
* @enc: the charset encoding if known
*
* Create a buffered parser input for the progressive parsing for the input
* from a memory area.
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlParserInputBufferCreateMem(const char *mem, int size, xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
if (size <= 0) return(NULL);
if (mem == NULL) return(NULL);
ret = xmlAllocParserInputBuffer(enc);
if (ret != NULL) {
ret->context = (void *) mem;
ret->readcallback = (xmlInputReadCallback) xmlNop;
ret->closecallback = NULL;
xmlBufferAdd(ret->buffer, (const xmlChar *) mem, size);
}
return(ret);
}
/**
* xmlParserInputBufferCreateStatic:
* @mem: the memory input
* @size: the length of the memory block
* @enc: the charset encoding if known
*
* Create a buffered parser input for the progressive parsing for the input
* from an immutable memory area. This will not copy the memory area to
* the buffer, but the memory is expected to be available until the end of
* the parsing, this is useful for example when using mmap'ed file.
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlParserInputBufferCreateStatic(const char *mem, int size,
xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
if (size <= 0) return(NULL);
if (mem == NULL) return(NULL);
ret = (xmlParserInputBufferPtr) xmlMalloc(sizeof(xmlParserInputBuffer));
if (ret == NULL) {
xmlIOErrMemory("creating input buffer");
return(NULL);
}
memset(ret, 0, (size_t) sizeof(xmlParserInputBuffer));
ret->buffer = xmlBufferCreateStatic((void *)mem, (size_t) size);
if (ret->buffer == NULL) {
xmlFree(ret);
return(NULL);
}
ret->encoder = xmlGetCharEncodingHandler(enc);
if (ret->encoder != NULL)
ret->raw = xmlBufferCreateSize(2 * xmlDefaultBufferSize);
else
ret->raw = NULL;
ret->compressed = -1;
ret->context = (void *) mem;
ret->readcallback = NULL;
ret->closecallback = NULL;
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlOutputBufferCreateFd:
* @fd: a file descriptor number
* @encoder: the encoding converter or NULL
*
* Create a buffered output for the progressive saving
* to a file descriptor
*
* Returns the new parser output or NULL
*/
xmlOutputBufferPtr
xmlOutputBufferCreateFd(int fd, xmlCharEncodingHandlerPtr encoder) {
xmlOutputBufferPtr ret;
if (fd < 0) return(NULL);
ret = xmlAllocOutputBuffer(encoder);
if (ret != NULL) {
ret->context = (void *) (long) fd;
ret->writecallback = xmlFdWrite;
ret->closecallback = NULL;
}
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlParserInputBufferCreateIO:
* @ioread: an I/O read function
* @ioclose: an I/O close function
* @ioctx: an I/O handler
* @enc: the charset encoding if known
*
* Create a buffered parser input for the progressive parsing for the input
* from an I/O handler
*
* Returns the new parser input or NULL
*/
xmlParserInputBufferPtr
xmlParserInputBufferCreateIO(xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose, void *ioctx, xmlCharEncoding enc) {
xmlParserInputBufferPtr ret;
if (ioread == NULL) return(NULL);
ret = xmlAllocParserInputBuffer(enc);
if (ret != NULL) {
ret->context = (void *) ioctx;
ret->readcallback = ioread;
ret->closecallback = ioclose;
}
return(ret);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlOutputBufferCreateIO:
* @iowrite: an I/O write function
* @ioclose: an I/O close function
* @ioctx: an I/O handler
* @encoder: the charset encoding if known
*
* Create a buffered output for the progressive saving
* to an I/O handler
*
* Returns the new parser output or NULL
*/
xmlOutputBufferPtr
xmlOutputBufferCreateIO(xmlOutputWriteCallback iowrite,
xmlOutputCloseCallback ioclose, void *ioctx,
xmlCharEncodingHandlerPtr encoder) {
xmlOutputBufferPtr ret;
if (iowrite == NULL) return(NULL);
ret = xmlAllocOutputBuffer(encoder);
if (ret != NULL) {
ret->context = (void *) ioctx;
ret->writecallback = iowrite;
ret->closecallback = ioclose;
}
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlParserInputBufferCreateFilenameDefault:
* @func: function pointer to the new ParserInputBufferCreateFilenameFunc
*
* Registers a callback for URI input file handling
*
* Returns the old value of the registration function
*/
xmlParserInputBufferCreateFilenameFunc
xmlParserInputBufferCreateFilenameDefault(xmlParserInputBufferCreateFilenameFunc func)
{
xmlParserInputBufferCreateFilenameFunc old = xmlParserInputBufferCreateFilenameValue;
if (old == NULL) {
old = __xmlParserInputBufferCreateFilename;
}
xmlParserInputBufferCreateFilenameValue = func;
return(old);
}
/**
* xmlOutputBufferCreateFilenameDefault:
* @func: function pointer to the new OutputBufferCreateFilenameFunc
*
* Registers a callback for URI output file handling
*
* Returns the old value of the registration function
*/
xmlOutputBufferCreateFilenameFunc
xmlOutputBufferCreateFilenameDefault(xmlOutputBufferCreateFilenameFunc func)
{
xmlOutputBufferCreateFilenameFunc old = xmlOutputBufferCreateFilenameValue;
#ifdef LIBXML_OUTPUT_ENABLED
if (old == NULL) {
old = __xmlOutputBufferCreateFilename;
}
#endif
xmlOutputBufferCreateFilenameValue = func;
return(old);
}
/**
* xmlParserInputBufferPush:
* @in: a buffered parser input
* @len: the size in bytes of the array.
* @buf: an char array
*
* Push the content of the arry in the input buffer
* This routine handle the I18N transcoding to internal UTF-8
* This is used when operating the parser in progressive (push) mode.
*
* Returns the number of chars read and stored in the buffer, or -1
* in case of error.
*/
int
xmlParserInputBufferPush(xmlParserInputBufferPtr in,
int len, const char *buf) {
int nbchars = 0;
if (len < 0) return(0);
if ((in == NULL) || (in->error)) return(-1);
if (in->encoder != NULL) {
unsigned int use;
/*
* Store the data in the incoming raw buffer
*/
if (in->raw == NULL) {
in->raw = xmlBufferCreate();
}
xmlBufferAdd(in->raw, (const xmlChar *) buf, len);
/*
* convert as much as possible to the parser reading buffer.
*/
use = in->raw->use;
nbchars = xmlCharEncInFunc(in->encoder, in->buffer, in->raw);
if (nbchars < 0) {
xmlIOErr(XML_IO_ENCODER, NULL);
in->error = XML_IO_ENCODER;
return(-1);
}
in->rawconsumed += (use - in->raw->use);
} else {
nbchars = len;
xmlBufferAdd(in->buffer, (xmlChar *) buf, nbchars);
}
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext,
"I/O: pushed %d chars, buffer %d/%d\n",
nbchars, in->buffer->use, in->buffer->size);
#endif
return(nbchars);
}
/**
* endOfInput:
*
* When reading from an Input channel indicated end of file or error
* don't reread from it again.
*/
static int
endOfInput (void * context ATTRIBUTE_UNUSED,
char * buffer ATTRIBUTE_UNUSED,
int len ATTRIBUTE_UNUSED) {
return(0);
}
/**
* xmlParserInputBufferGrow:
* @in: a buffered parser input
* @len: indicative value of the amount of chars to read
*
* Grow up the content of the input buffer, the old data are preserved
* This routine handle the I18N transcoding to internal UTF-8
* This routine is used when operating the parser in normal (pull) mode
*
* TODO: one should be able to remove one extra copy by copying directly
* onto in->buffer or in->raw
*
* Returns the number of chars read and stored in the buffer, or -1
* in case of error.
*/
int
xmlParserInputBufferGrow(xmlParserInputBufferPtr in, int len) {
char *buffer = NULL;
int res = 0;
int nbchars = 0;
int buffree;
unsigned int needSize;
if ((in == NULL) || (in->error)) return(-1);
if ((len <= MINLEN) && (len != 4))
len = MINLEN;
buffree = in->buffer->size - in->buffer->use;
if (buffree <= 0) {
xmlIOErr(XML_IO_BUFFER_FULL, NULL);
in->error = XML_IO_BUFFER_FULL;
return(0);
}
needSize = in->buffer->use + len + 1;
if (needSize > in->buffer->size){
if (!xmlBufferResize(in->buffer, needSize)){
xmlIOErrMemory("growing input buffer");
in->error = XML_ERR_NO_MEMORY;
return(0);
}
}
buffer = (char *)&in->buffer->content[in->buffer->use];
/*
* Call the read method for this I/O type.
*/
if (in->readcallback != NULL) {
res = in->readcallback(in->context, &buffer[0], len);
if (res <= 0)
in->readcallback = endOfInput;
} else {
xmlIOErr(XML_IO_NO_INPUT, NULL);
in->error = XML_IO_NO_INPUT;
return(-1);
}
if (res < 0) {
return(-1);
}
len = res;
if (in->encoder != NULL) {
unsigned int use;
/*
* Store the data in the incoming raw buffer
*/
if (in->raw == NULL) {
in->raw = xmlBufferCreate();
}
xmlBufferAdd(in->raw, (const xmlChar *) buffer, len);
/*
* convert as much as possible to the parser reading buffer.
*/
use = in->raw->use;
nbchars = xmlCharEncInFunc(in->encoder, in->buffer, in->raw);
if (nbchars < 0) {
xmlIOErr(XML_IO_ENCODER, NULL);
in->error = XML_IO_ENCODER;
return(-1);
}
in->rawconsumed += (use - in->raw->use);
} else {
nbchars = len;
in->buffer->use += nbchars;
buffer[nbchars] = 0;
}
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext,
"I/O: read %d chars, buffer %d/%d\n",
nbchars, in->buffer->use, in->buffer->size);
#endif
return(nbchars);
}
/**
* xmlParserInputBufferRead:
* @in: a buffered parser input
* @len: indicative value of the amount of chars to read
*
* Refresh the content of the input buffer, the old data are considered
* consumed
* This routine handle the I18N transcoding to internal UTF-8
*
* Returns the number of chars read and stored in the buffer, or -1
* in case of error.
*/
int
xmlParserInputBufferRead(xmlParserInputBufferPtr in, int len) {
if ((in == NULL) || (in->error)) return(-1);
if (in->readcallback != NULL)
return(xmlParserInputBufferGrow(in, len));
else if ((in->buffer != NULL) &&
(in->buffer->alloc == XML_BUFFER_ALLOC_IMMUTABLE))
return(0);
else
return(-1);
}
#ifdef LIBXML_OUTPUT_ENABLED
/**
* xmlOutputBufferWrite:
* @out: a buffered parser output
* @len: the size in bytes of the array.
* @buf: an char array
*
* Write the content of the array in the output I/O buffer
* This routine handle the I18N transcoding from internal UTF-8
* The buffer is lossless, i.e. will store in case of partial
* or delayed writes.
*
* Returns the number of chars immediately written, or -1
* in case of error.
*/
int
xmlOutputBufferWrite(xmlOutputBufferPtr out, int len, const char *buf) {
int nbchars = 0; /* number of chars to output to I/O */
int ret; /* return from function call */
int written = 0; /* number of char written to I/O so far */
int chunk; /* number of byte curreent processed from buf */
if ((out == NULL) || (out->error)) return(-1);
if (len < 0) return(0);
if (out->error) return(-1);
do {
chunk = len;
if (chunk > 4 * MINLEN)
chunk = 4 * MINLEN;
/*
* first handle encoding stuff.
*/
if (out->encoder != NULL) {
/*
* Store the data in the incoming raw buffer
*/
if (out->conv == NULL) {
out->conv = xmlBufferCreate();
}
xmlBufferAdd(out->buffer, (const xmlChar *) buf, chunk);
if ((out->buffer->use < MINLEN) && (chunk == len))
goto done;
/*
* convert as much as possible to the parser reading buffer.
*/
ret = xmlCharEncOutFunc(out->encoder, out->conv, out->buffer);
if ((ret < 0) && (ret != -3)) {
xmlIOErr(XML_IO_ENCODER, NULL);
out->error = XML_IO_ENCODER;
return(-1);
}
nbchars = out->conv->use;
} else {
xmlBufferAdd(out->buffer, (const xmlChar *) buf, chunk);
nbchars = out->buffer->use;
}
buf += chunk;
len -= chunk;
if ((nbchars < MINLEN) && (len <= 0))
goto done;
if (out->writecallback) {
/*
* second write the stuff to the I/O channel
*/
if (out->encoder != NULL) {
ret = out->writecallback(out->context,
(const char *)out->conv->content, nbchars);
if (ret >= 0)
xmlBufferShrink(out->conv, ret);
} else {
ret = out->writecallback(out->context,
(const char *)out->buffer->content, nbchars);
if (ret >= 0)
xmlBufferShrink(out->buffer, ret);
}
if (ret < 0) {
xmlIOErr(XML_IO_WRITE, NULL);
out->error = XML_IO_WRITE;
return(ret);
}
out->written += ret;
}
written += nbchars;
} while (len > 0);
done:
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext,
"I/O: wrote %d chars\n", written);
#endif
return(written);
}
/**
* xmlEscapeContent:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of unescaped UTF-8 bytes
* @inlen: the length of @in
*
* Take a block of UTF-8 chars in and escape them.
* Returns 0 if success, or -1 otherwise
* The value of @inlen after return is the number of octets consumed
* if the return value is positive, else unpredictable.
* The value of @outlen after return is the number of octets consumed.
*/
static int
xmlEscapeContent(unsigned char* out, int *outlen,
const xmlChar* in, int *inlen) {
unsigned char* outstart = out;
const unsigned char* base = in;
unsigned char* outend = out + *outlen;
const unsigned char* inend;
inend = in + (*inlen);
while ((in < inend) && (out < outend)) {
if (*in == '<') {
if (outend - out < 4) break;
*out++ = '&';
*out++ = 'l';
*out++ = 't';
*out++ = ';';
} else if (*in == '>') {
if (outend - out < 4) break;
*out++ = '&';
*out++ = 'g';
*out++ = 't';
*out++ = ';';
} else if (*in == '&') {
if (outend - out < 5) break;
*out++ = '&';
*out++ = 'a';
*out++ = 'm';
*out++ = 'p';
*out++ = ';';
} else if (*in == '\r') {
if (outend - out < 5) break;
*out++ = '&';
*out++ = '#';
*out++ = '1';
*out++ = '3';
*out++ = ';';
} else {
*out++ = (unsigned char) *in;
}
++in;
}
*outlen = out - outstart;
*inlen = in - base;
return(0);
}
/**
* xmlOutputBufferWriteEscape:
* @out: a buffered parser output
* @str: a zero terminated UTF-8 string
* @escaping: an optional escaping function (or NULL)
*
* Write the content of the string in the output I/O buffer
* This routine escapes the caracters and then handle the I18N
* transcoding from internal UTF-8
* The buffer is lossless, i.e. will store in case of partial
* or delayed writes.
*
* Returns the number of chars immediately written, or -1
* in case of error.
*/
int
xmlOutputBufferWriteEscape(xmlOutputBufferPtr out, const xmlChar *str,
xmlCharEncodingOutputFunc escaping) {
int nbchars = 0; /* number of chars to output to I/O */
int ret; /* return from function call */
int written = 0; /* number of char written to I/O so far */
int chunk; /* number of byte currently processed from str */
int len; /* number of bytes in str */
int cons; /* byte from str consumed */
if ((out == NULL) || (out->error) || (str == NULL)) return(-1);
len = strlen((const char *)str);
if (len < 0) return(0);
if (out->error) return(-1);
if (escaping == NULL) escaping = xmlEscapeContent;
do {
/*
* how many bytes to consume and how many bytes to store.
*/
cons = len;
chunk = (out->buffer->size - out->buffer->use) - 1;
/*
* first handle encoding stuff.
*/
if (out->encoder != NULL) {
/*
* Store the data in the incoming raw buffer
*/
if (out->conv == NULL) {
out->conv = xmlBufferCreate();
}
ret = escaping(out->buffer->content + out->buffer->use ,
&chunk, str, &cons);
if (ret < 0)
return(-1);
out->buffer->use += chunk;
out->buffer->content[out->buffer->use] = 0;
if ((out->buffer->use < MINLEN) && (cons == len))
goto done;
/*
* convert as much as possible to the output buffer.
*/
ret = xmlCharEncOutFunc(out->encoder, out->conv, out->buffer);
if ((ret < 0) && (ret != -3)) {
xmlIOErr(XML_IO_ENCODER, NULL);
out->error = XML_IO_ENCODER;
return(-1);
}
nbchars = out->conv->use;
} else {
ret = escaping(out->buffer->content + out->buffer->use ,
&chunk, str, &cons);
if (ret < 0)
return(-1);
out->buffer->use += chunk;
out->buffer->content[out->buffer->use] = 0;
nbchars = out->buffer->use;
}
str += cons;
len -= cons;
if ((nbchars < MINLEN) && (len <= 0))
goto done;
if (out->writecallback) {
/*
* second write the stuff to the I/O channel
*/
if (out->encoder != NULL) {
ret = out->writecallback(out->context,
(const char *)out->conv->content, nbchars);
if (ret >= 0)
xmlBufferShrink(out->conv, ret);
} else {
ret = out->writecallback(out->context,
(const char *)out->buffer->content, nbchars);
if (ret >= 0)
xmlBufferShrink(out->buffer, ret);
}
if (ret < 0) {
xmlIOErr(XML_IO_WRITE, NULL);
out->error = XML_IO_WRITE;
return(ret);
}
out->written += ret;
} else if (out->buffer->size - out->buffer->use < MINLEN) {
xmlBufferResize(out->buffer, out->buffer->size + MINLEN);
}
written += nbchars;
} while (len > 0);
done:
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext,
"I/O: wrote %d chars\n", written);
#endif
return(written);
}
/**
* xmlOutputBufferWriteString:
* @out: a buffered parser output
* @str: a zero terminated C string
*
* Write the content of the string in the output I/O buffer
* This routine handle the I18N transcoding from internal UTF-8
* The buffer is lossless, i.e. will store in case of partial
* or delayed writes.
*
* Returns the number of chars immediately written, or -1
* in case of error.
*/
int
xmlOutputBufferWriteString(xmlOutputBufferPtr out, const char *str) {
int len;
if ((out == NULL) || (out->error)) return(-1);
if (str == NULL)
return(-1);
len = strlen(str);
if (len > 0)
return(xmlOutputBufferWrite(out, len, str));
return(len);
}
/**
* xmlOutputBufferFlush:
* @out: a buffered output
*
* flushes the output I/O channel
*
* Returns the number of byte written or -1 in case of error.
*/
int
xmlOutputBufferFlush(xmlOutputBufferPtr out) {
int nbchars = 0, ret = 0;
if ((out == NULL) || (out->error)) return(-1);
/*
* first handle encoding stuff.
*/
if ((out->conv != NULL) && (out->encoder != NULL)) {
/*
* convert as much as possible to the parser reading buffer.
*/
nbchars = xmlCharEncOutFunc(out->encoder, out->conv, out->buffer);
if (nbchars < 0) {
xmlIOErr(XML_IO_ENCODER, NULL);
out->error = XML_IO_ENCODER;
return(-1);
}
}
/*
* second flush the stuff to the I/O channel
*/
if ((out->conv != NULL) && (out->encoder != NULL) &&
(out->writecallback != NULL)) {
ret = out->writecallback(out->context,
(const char *)out->conv->content, out->conv->use);
if (ret >= 0)
xmlBufferShrink(out->conv, ret);
} else if (out->writecallback != NULL) {
ret = out->writecallback(out->context,
(const char *)out->buffer->content, out->buffer->use);
if (ret >= 0)
xmlBufferShrink(out->buffer, ret);
}
if (ret < 0) {
xmlIOErr(XML_IO_FLUSH, NULL);
out->error = XML_IO_FLUSH;
return(ret);
}
out->written += ret;
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext,
"I/O: flushed %d chars\n", ret);
#endif
return(ret);
}
#endif /* LIBXML_OUTPUT_ENABLED */
/**
* xmlParserGetDirectory:
* @filename: the path to a file
*
* lookup the directory for that file
*
* Returns a new allocated string containing the directory, or NULL.
*/
char *
xmlParserGetDirectory(const char *filename) {
char *ret = NULL;
char dir[1024];
char *cur;
char sep = '/';
#ifdef _WIN32_WCE /* easy way by now ... wince does not have dirs! */
return NULL;
#endif
if (xmlInputCallbackInitialized == 0)
xmlRegisterDefaultInputCallbacks();
if (filename == NULL) return(NULL);
#if defined(WIN32) && !defined(__CYGWIN__)
sep = '\\';
#endif
strncpy(dir, filename, 1023);
dir[1023] = 0;
cur = &dir[strlen(dir)];
while (cur > dir) {
if (*cur == sep) break;
cur --;
}
if (*cur == sep) {
if (cur == dir) dir[1] = 0;
else *cur = 0;
ret = xmlMemStrdup(dir);
} else {
if (getcwd(dir, 1024) != NULL) {
dir[1023] = 0;
ret = xmlMemStrdup(dir);
}
}
return(ret);
}
/****************************************************************
* *
* External entities loading *
* *
****************************************************************/
/**
* xmlCheckHTTPInput:
* @ctxt: an XML parser context
* @ret: an XML parser input
*
* Check an input in case it was created from an HTTP stream, in that
* case it will handle encoding and update of the base URL in case of
* redirection. It also checks for HTTP errors in which case the input
* is cleanly freed up and an appropriate error is raised in context
*
* Returns the input or NULL in case of HTTP error.
*/
xmlParserInputPtr
xmlCheckHTTPInput(xmlParserCtxtPtr ctxt, xmlParserInputPtr ret) {
#ifdef LIBXML_HTTP_ENABLED
if ((ret != NULL) && (ret->buf != NULL) &&
(ret->buf->readcallback == xmlIOHTTPRead) &&
(ret->buf->context != NULL)) {
const char *encoding;
const char *redir;
const char *mime;
int code;
code = xmlNanoHTTPReturnCode(ret->buf->context);
if (code >= 400) {
/* fatal error */
if (ret->filename != NULL)
__xmlLoaderErr(ctxt, "failed to load HTTP resource \"%s\"\n",
(const char *) ret->filename);
else
__xmlLoaderErr(ctxt, "failed to load HTTP resource\n", NULL);
xmlFreeInputStream(ret);
ret = NULL;
} else {
mime = xmlNanoHTTPMimeType(ret->buf->context);
if ((xmlStrstr(BAD_CAST mime, BAD_CAST "/xml")) ||
(xmlStrstr(BAD_CAST mime, BAD_CAST "+xml"))) {
encoding = xmlNanoHTTPEncoding(ret->buf->context);
if (encoding != NULL) {
xmlCharEncodingHandlerPtr handler;
handler = xmlFindCharEncodingHandler(encoding);
if (handler != NULL) {
xmlSwitchInputEncoding(ctxt, ret, handler);
} else {
__xmlErrEncoding(ctxt, XML_ERR_UNKNOWN_ENCODING,
"Unknown encoding %s",
BAD_CAST encoding, NULL);
}
if (ret->encoding == NULL)
ret->encoding = xmlStrdup(BAD_CAST encoding);
}
#if 0
} else if (xmlStrstr(BAD_CAST mime, BAD_CAST "html")) {
#endif
}
redir = xmlNanoHTTPRedir(ret->buf->context);
if (redir != NULL) {
if (ret->filename != NULL)
xmlFree((xmlChar *) ret->filename);
if (ret->directory != NULL) {
xmlFree((xmlChar *) ret->directory);
ret->directory = NULL;
}
ret->filename =
(char *) xmlStrdup((const xmlChar *) redir);
}
}
}
#endif
return(ret);
}
static int xmlSysIDExists(const char *URL) {
#ifdef HAVE_STAT
int ret;
struct stat info;
const char *path;
if (URL == NULL)
return(0);
if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file://localhost/", 17))
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &URL[17];
#else
path = &URL[16];
#endif
else if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file:///", 8)) {
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &URL[8];
#else
path = &URL[7];
#endif
} else
path = URL;
ret = stat(path, &info);
if (ret == 0)
return(1);
#endif
return(0);
}
/**
* xmlDefaultExternalEntityLoader:
* @URL: the URL for the entity to load
* @ID: the System ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* By default we don't load external entitites, yet.
*
* Returns a new allocated xmlParserInputPtr, or NULL.
*/
static xmlParserInputPtr
xmlDefaultExternalEntityLoader(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt)
{
xmlParserInputPtr ret = NULL;
xmlChar *resource = NULL;
#ifdef LIBXML_CATALOG_ENABLED
xmlCatalogAllow pref;
#endif
#ifdef DEBUG_EXTERNAL_ENTITIES
xmlGenericError(xmlGenericErrorContext,
"xmlDefaultExternalEntityLoader(%s, xxx)\n", URL);
#endif
#ifdef LIBXML_CATALOG_ENABLED
if ((ctxt != NULL) && (ctxt->options & XML_PARSE_NONET)) {
int options = ctxt->options;
ctxt->options -= XML_PARSE_NONET;
ret = xmlNoNetExternalEntityLoader(URL, ID, ctxt);
ctxt->options = options;
return(ret);
}
/*
* If the resource doesn't exists as a file,
* try to load it from the resource pointed in the catalogs
*/
pref = xmlCatalogGetDefaults();
if ((pref != XML_CATA_ALLOW_NONE) && (!xmlSysIDExists(URL))) {
/*
* Do a local lookup
*/
if ((ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
resource = xmlCatalogLocalResolve(ctxt->catalogs,
(const xmlChar *) ID,
(const xmlChar *) URL);
}
/*
* Try a global lookup
*/
if ((resource == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
resource = xmlCatalogResolve((const xmlChar *) ID,
(const xmlChar *) URL);
}
if ((resource == NULL) && (URL != NULL))
resource = xmlStrdup((const xmlChar *) URL);
/*
* TODO: do an URI lookup on the reference
*/
if ((resource != NULL)
&& (!xmlSysIDExists((const char *) resource))) {
xmlChar *tmp = NULL;
if ((ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
tmp = xmlCatalogLocalResolveURI(ctxt->catalogs, resource);
}
if ((tmp == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
tmp = xmlCatalogResolveURI(resource);
}
if (tmp != NULL) {
xmlFree(resource);
resource = tmp;
}
}
}
#endif
if (resource == NULL)
resource = (xmlChar *) URL;
if (resource == NULL) {
if (ID == NULL)
ID = "NULL";
__xmlLoaderErr(ctxt, "failed to load external entity \"%s\"\n", ID);
return (NULL);
}
ret = xmlNewInputFromFile(ctxt, (const char *) resource);
if ((resource != NULL) && (resource != (xmlChar *) URL))
xmlFree(resource);
return (ret);
}
static xmlExternalEntityLoader xmlCurrentExternalEntityLoader =
xmlDefaultExternalEntityLoader;
/**
* xmlSetExternalEntityLoader:
* @f: the new entity resolver function
*
* Changes the defaultexternal entity resolver function for the application
*/
void
xmlSetExternalEntityLoader(xmlExternalEntityLoader f) {
xmlCurrentExternalEntityLoader = f;
}
/**
* xmlGetExternalEntityLoader:
*
* Get the default external entity resolver function for the application
*
* Returns the xmlExternalEntityLoader function pointer
*/
xmlExternalEntityLoader
xmlGetExternalEntityLoader(void) {
return(xmlCurrentExternalEntityLoader);
}
/**
* xmlLoadExternalEntity:
* @URL: the URL for the entity to load
* @ID: the Public ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* Load an external entity, note that the use of this function for
* unparsed entities may generate problems
* TODO: a more generic External entity API must be designed
*
* Returns the xmlParserInputPtr or NULL
*/
xmlParserInputPtr
xmlLoadExternalEntity(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt) {
if ((URL != NULL) && (xmlSysIDExists(URL) == 0)) {
char *canonicFilename;
xmlParserInputPtr ret;
canonicFilename = (char *) xmlCanonicPath((const xmlChar *) URL);
if (canonicFilename == NULL) {
xmlIOErrMemory("building canonical path\n");
return(NULL);
}
ret = xmlCurrentExternalEntityLoader(canonicFilename, ID, ctxt);
xmlFree(canonicFilename);
return(ret);
}
return(xmlCurrentExternalEntityLoader(URL, ID, ctxt));
}
/************************************************************************
* *
* Disabling Network access *
* *
************************************************************************/
#ifdef LIBXML_CATALOG_ENABLED
static int
xmlNoNetExists(const char *URL)
{
#ifdef HAVE_STAT
int ret;
struct stat info;
const char *path;
if (URL == NULL)
return (0);
if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file://localhost/", 17))
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &URL[17];
#else
path = &URL[16];
#endif
else if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file:///", 8)) {
#if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
path = &URL[8];
#else
path = &URL[7];
#endif
} else
path = URL;
ret = stat(path, &info);
if (ret == 0)
return (1);
#endif
return (0);
}
#endif
/**
* xmlNoNetExternalEntityLoader:
* @URL: the URL for the entity to load
* @ID: the System ID for the entity to load
* @ctxt: the context in which the entity is called or NULL
*
* A specific entity loader disabling network accesses, though still
* allowing local catalog accesses for resolution.
*
* Returns a new allocated xmlParserInputPtr, or NULL.
*/
xmlParserInputPtr
xmlNoNetExternalEntityLoader(const char *URL, const char *ID,
xmlParserCtxtPtr ctxt) {
xmlParserInputPtr input = NULL;
xmlChar *resource = NULL;
#ifdef LIBXML_CATALOG_ENABLED
xmlCatalogAllow pref;
/*
* If the resource doesn't exists as a file,
* try to load it from the resource pointed in the catalogs
*/
pref = xmlCatalogGetDefaults();
if ((pref != XML_CATA_ALLOW_NONE) && (!xmlNoNetExists(URL))) {
/*
* Do a local lookup
*/
if ((ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
resource = xmlCatalogLocalResolve(ctxt->catalogs,
(const xmlChar *)ID,
(const xmlChar *)URL);
}
/*
* Try a global lookup
*/
if ((resource == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
resource = xmlCatalogResolve((const xmlChar *)ID,
(const xmlChar *)URL);
}
if ((resource == NULL) && (URL != NULL))
resource = xmlStrdup((const xmlChar *) URL);
/*
* TODO: do an URI lookup on the reference
*/
if ((resource != NULL) && (!xmlNoNetExists((const char *)resource))) {
xmlChar *tmp = NULL;
if ((ctxt->catalogs != NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_DOCUMENT))) {
tmp = xmlCatalogLocalResolveURI(ctxt->catalogs, resource);
}
if ((tmp == NULL) &&
((pref == XML_CATA_ALLOW_ALL) ||
(pref == XML_CATA_ALLOW_GLOBAL))) {
tmp = xmlCatalogResolveURI(resource);
}
if (tmp != NULL) {
xmlFree(resource);
resource = tmp;
}
}
}
#endif
if (resource == NULL)
resource = (xmlChar *) URL;
if (resource != NULL) {
if ((!xmlStrncasecmp(BAD_CAST resource, BAD_CAST "ftp://", 6)) ||
(!xmlStrncasecmp(BAD_CAST resource, BAD_CAST "http://", 7))) {
xmlIOErr(XML_IO_NETWORK_ATTEMPT, (const char *) resource);
if (resource != (xmlChar *) URL)
xmlFree(resource);
return(NULL);
}
}
input = xmlDefaultExternalEntityLoader((const char *) resource, ID, ctxt);
if (resource != (xmlChar *) URL)
xmlFree(resource);
return(input);
}
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