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mapio.c
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mapio.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Implementations for MapServer IO redirection capability.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 2004, Frank Warmerdam <warmerdam@pobox.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include <stdarg.h>
#include "mapserver.h"
#include "mapthread.h"
#ifdef _WIN32
#include <fcntl.h>
#include <io.h>
#endif
#ifdef MOD_WMS_ENABLED
# include "httpd.h"
# include "apr_strings.h"
#endif
static int is_msIO_initialized = MS_FALSE;
static int is_msIO_header_enabled = MS_TRUE;
typedef struct msIOContextGroup_t {
msIOContext stdin_context;
msIOContext stdout_context;
msIOContext stderr_context;
void* thread_id;
struct msIOContextGroup_t *next;
} msIOContextGroup;
static msIOContextGroup default_contexts;
static msIOContextGroup *io_context_list = NULL;
static void msIO_Initialize( void );
#ifdef msIO_printf
# undef msIO_printf
# undef msIO_fprintf
# undef msIO_fwrite
# undef msIO_fread
# undef msIO_vfprintf
#endif
/************************************************************************/
/* msIO_Cleanup() */
/************************************************************************/
void msIO_Cleanup()
{
if( is_msIO_initialized )
{
is_msIO_initialized = MS_FALSE;
while( io_context_list != NULL ) {
msIOContextGroup *last = io_context_list;
io_context_list = io_context_list->next;
free( last );
}
}
}
/************************************************************************/
/* msIO_GetContextGroup() */
/************************************************************************/
static msIOContextGroup *msIO_GetContextGroup()
{
void* nThreadId = msGetThreadId();
msIOContextGroup *prev = NULL, *group = io_context_list;
if( group != NULL && group->thread_id == nThreadId )
return group;
/* -------------------------------------------------------------------- */
/* Search for group for this thread */
/* -------------------------------------------------------------------- */
msAcquireLock( TLOCK_IOCONTEXT );
msIO_Initialize();
group = io_context_list;
while( group != NULL && group->thread_id != nThreadId ) {
prev = group;
group = group->next;
}
/* -------------------------------------------------------------------- */
/* If we found it, make sure it is pushed to the front of the */
/* link for faster finding next time, and return it. */
/* -------------------------------------------------------------------- */
if( group != NULL ) {
if( prev != NULL ) {
prev->next = group->next;
group->next = io_context_list;
io_context_list = group;
}
msReleaseLock( TLOCK_IOCONTEXT );
return group;
}
/* -------------------------------------------------------------------- */
/* Create a new context group for this thread. */
/* -------------------------------------------------------------------- */
group = (msIOContextGroup *) calloc(sizeof(msIOContextGroup),1);
group->stdin_context = default_contexts.stdin_context;
group->stdout_context = default_contexts.stdout_context;
group->stderr_context = default_contexts.stderr_context;
group->thread_id = nThreadId;
group->next = io_context_list;
io_context_list = group;
msReleaseLock( TLOCK_IOCONTEXT );
return group;
}
/* returns MS_TRUE if the msIO standard output hasn't been redirected */
int msIO_isStdContext() {
msIOContextGroup *group = io_context_list;
void* nThreadId = msGetThreadId();
if(!group || group->thread_id != nThreadId) {
group = msIO_GetContextGroup();
if(!group) {
return MS_FALSE; /* probably a bug */
}
}
if(group->stderr_context.cbData == (void*)stderr &&
group->stdin_context.cbData == (void*)stdin &&
group->stdout_context.cbData == (void*)stdout)
return MS_TRUE;
return MS_FALSE;
}
/************************************************************************/
/* msIO_getHandler() */
/************************************************************************/
msIOContext *msIO_getHandler( FILE * fp )
{
void* nThreadId = msGetThreadId();
msIOContextGroup *group = io_context_list;
msIO_Initialize();
if( group == NULL || group->thread_id != nThreadId ) {
group = msIO_GetContextGroup();
if( group == NULL )
return NULL;
}
if( fp == stdin || fp == NULL || strcmp((const char *)fp,"stdin") == 0 )
return &(group->stdin_context);
else if( fp == stdout || strcmp((const char *)fp,"stdout") == 0 )
return &(group->stdout_context);
else if( fp == stderr || strcmp((const char *)fp,"stderr") == 0 )
return &(group->stderr_context);
else
return NULL;
}
/************************************************************************/
/* msIO_setHeaderEnabled() */
/************************************************************************/
void msIO_setHeaderEnabled(int bFlag)
{
is_msIO_header_enabled = bFlag;
}
/************************************************************************/
/* msIO_setHeader() */
/************************************************************************/
void msIO_setHeader (const char *header, const char* value, ...)
{
va_list args;
va_start( args, value );
#ifdef MOD_WMS_ENABLED
msIOContext *ioctx = msIO_getHandler (stdout);
if(ioctx && !strcmp(ioctx->label,"apache")) {
request_rec *r = (request_rec*) (ioctx->cbData);
char *fullvalue = apr_pvsprintf(r->pool, value,args);
if (strcasecmp (header, "Content-Type") == 0) {
r->content_type = fullvalue;
} else if (strcasecmp (header, "Status") == 0) {
r->status = atoi (fullvalue);
} else {
apr_table_setn (r->headers_out,
apr_pstrdup (r->pool, header),
fullvalue
);
}
} else {
#endif // MOD_WMS_ENABLED
if( is_msIO_header_enabled ) {
msIO_fprintf(stdout,"%s: ",header);
msIO_vfprintf(stdout,value,args);
msIO_fprintf(stdout,"\r\n");
}
#ifdef MOD_WMS_ENABLED
}
#endif
va_end( args );
}
void msIO_sendHeaders ()
{
#ifdef MOD_WMS_ENABLED
msIOContext *ioctx = msIO_getHandler (stdout);
if(ioctx && !strcmp(ioctx->label,"apache")) return;
#endif // !MOD_WMS_ENABLED
if( is_msIO_header_enabled ) {
msIO_printf ("\r\n");
fflush (stdout);
}
}
/************************************************************************/
/* msIO_installHandlers() */
/************************************************************************/
int msIO_installHandlers( msIOContext *stdin_context,
msIOContext *stdout_context,
msIOContext *stderr_context )
{
msIOContextGroup *group;
msIO_Initialize();
group = msIO_GetContextGroup();
if( stdin_context == NULL )
group->stdin_context = default_contexts.stdin_context;
else if( stdin_context != &group->stdin_context )
group->stdin_context = *stdin_context;
if( stdout_context == NULL )
group->stdout_context = default_contexts.stdout_context;
else if( stdout_context != &group->stdout_context )
group->stdout_context = *stdout_context;
if( stderr_context == NULL )
group->stderr_context = default_contexts.stderr_context;
else if( stderr_context != &group->stderr_context )
group->stderr_context = *stderr_context;
return MS_TRUE;
}
/************************************************************************/
/* msIO_contextRead() */
/************************************************************************/
int msIO_contextRead( msIOContext *context, void *data, int byteCount )
{
if( context->write_channel == MS_TRUE )
return 0;
else
return context->readWriteFunc( context->cbData, data, byteCount );
}
/************************************************************************/
/* msIO_contextWrite() */
/************************************************************************/
int msIO_contextWrite( msIOContext *context, const void *data, int byteCount )
{
if( context->write_channel == MS_FALSE )
return 0;
else
return context->readWriteFunc( context->cbData, (void *) data,
byteCount );
}
/* ==================================================================== */
/* ==================================================================== */
/* Stdio-like cover functions. */
/* ==================================================================== */
/* ==================================================================== */
/************************************************************************/
/* _ms_vsprintf() */
/************************************************************************/
static int _ms_vsprintf(char **workBufPtr, const char *format, va_list ap )
{
int ret_val;
int workBufSize = 16000;
*workBufPtr = (char*)malloc(workBufSize * sizeof(char));
if (*workBufPtr == NULL) {
msSetError( MS_MEMERR, NULL, "_ms_vsprintf()");
return -1;
}
#if defined(HAVE_VSNPRINTF)
/* This should grow a big enough buffer to hold any formatted result. */
{
va_list wrk_args;
#ifdef va_copy
va_copy( wrk_args, ap );
#else
wrk_args = ap;
#endif
while( (ret_val = vsnprintf( *workBufPtr, workBufSize,
format, wrk_args)) >= workBufSize-1
|| ret_val == -1 ) {
workBufSize *= 4;
*workBufPtr = (char *) realloc(*workBufPtr, workBufSize );
if (*workBufPtr == NULL) {
msSetError( MS_MEMERR, NULL, "_ms_vsprintf()");
va_end( wrk_args );
return -1;
}
#ifdef va_copy
va_end( wrk_args );
va_copy( wrk_args, ap );
#else
wrk_args = ap;
#endif
}
va_end( wrk_args );
}
#else
/* We do not have vsnprintf()... there is a risk of buffer overrun */
ret_val = vsprintf( *workBufPtr, format, ap );
if( ret_val < 0 || ret_val >= workBufSize ) {
msSetError(MS_MISCERR, "Possible buffer overrun.", "_ms_vsprintf()");
msFree(*workBufPtr);
*workBufPtr = NULL;
return -1;
}
#endif
return ret_val;
}
/************************************************************************/
/* msIO_printf() */
/************************************************************************/
int msIO_printf( const char *format, ... )
{
va_list args;
int ret;
va_start( args, format );
ret = msIO_vfprintf(stdout,format,args);
va_end(args);
return ret;
}
/************************************************************************/
/* msIO_fprintf() */
/************************************************************************/
int msIO_fprintf( FILE *fp, const char *format, ... )
{
va_list args;
int ret;
va_start( args, format );
ret = msIO_vfprintf(fp,format,args);
va_end(args);
return ret;
}
/************************************************************************/
/* msIO_vfprintf() */
/************************************************************************/
int msIO_vfprintf( FILE *fp, const char *format, va_list ap )
{
va_list args_copy;
int return_val;
msIOContext *context;
char workBuf[8000];
#if !defined(HAVE_VSNPRINTF)
return_val = vsprintf( workBuf, format, ap);
if( return_val < 0 || return_val >= sizeof(workBuf) ) {
msSetError(MS_MISCERR, "Possible buffer overrun.", "msIO_vfprintf()");
return -1;
}
char* outbuf = workBuf;
#else
#ifdef va_copy
va_copy( args_copy, ap );
#else
args_copy = ap;
#endif /* va_copy */
char* largerBuf = NULL;
return_val = vsnprintf( workBuf, sizeof(workBuf), format, ap );
if (return_val == -1 || return_val >= sizeof(workBuf)-1) {
return_val = _ms_vsprintf(&largerBuf, format, args_copy );
}
va_end(args_copy);
if (return_val < 0)
return -1;
char* outbuf = largerBuf?largerBuf:workBuf;
#endif /* HAVE_VSNPRINTF */
context = msIO_getHandler( fp );
if( context == NULL )
return_val = fwrite(outbuf , 1, return_val, fp );
else
return_val = msIO_contextWrite( context,
outbuf,
return_val );
#if defined(HAVE_VSNPRINTF)
msFree(largerBuf);
#endif
return return_val;
}
/************************************************************************/
/* msIO_fwrite() */
/************************************************************************/
int msIO_fwrite( const void *data, size_t size, size_t nmemb, FILE *fp )
{
msIOContext *context;
if( size == 0 || nmemb == 0 )
return 0;
context = msIO_getHandler( fp );
if( context == NULL )
return fwrite( data, size, nmemb, fp );
else
return msIO_contextWrite( context, data, size * nmemb ) / size;
}
/************************************************************************/
/* msIO_fread() */
/************************************************************************/
int msIO_fread( void *data, size_t size, size_t nmemb, FILE *fp )
{
msIOContext *context;
if( size == 0 || nmemb == 0 )
return 0;
context = msIO_getHandler( fp );
if( context == NULL )
return fread( data, size, nmemb, fp );
else
return msIO_contextRead( context, data, size * nmemb ) / size;
}
/* ==================================================================== */
/* ==================================================================== */
/* Internal default callbacks implementing stdio reading and */
/* writing. */
/* ==================================================================== */
/* ==================================================================== */
/************************************************************************/
/* msIO_stdioRead() */
/* */
/* This is the default implementation via stdio. */
/************************************************************************/
static int msIO_stdioRead( void *cbData, void *data, int byteCount )
{
return fread( data, 1, byteCount, (FILE *) cbData );
}
/************************************************************************/
/* msIO_stdioWrite() */
/* */
/* This is the default implementation via stdio. */
/************************************************************************/
static int msIO_stdioWrite( void *cbData, void *data, int byteCount )
{
return fwrite( data, 1, byteCount, (FILE *) cbData );
}
/************************************************************************/
/* msIO_Initialize() */
/************************************************************************/
static void msIO_Initialize( void )
{
if( is_msIO_initialized == MS_TRUE )
return;
default_contexts.stdin_context.label = "stdio";
default_contexts.stdin_context.write_channel = MS_FALSE;
default_contexts.stdin_context.readWriteFunc = msIO_stdioRead;
default_contexts.stdin_context.cbData = (void *) stdin;
default_contexts.stdout_context.label = "stdio";
default_contexts.stdout_context.write_channel = MS_TRUE;
default_contexts.stdout_context.readWriteFunc = msIO_stdioWrite;
default_contexts.stdout_context.cbData = (void *) stdout;
default_contexts.stderr_context.label = "stdio";
default_contexts.stderr_context.write_channel = MS_TRUE;
default_contexts.stderr_context.readWriteFunc = msIO_stdioWrite;
default_contexts.stderr_context.cbData = (void *) stderr;
default_contexts.next = NULL;
default_contexts.thread_id = 0;
is_msIO_initialized = MS_TRUE;
}
/* ==================================================================== */
/* ==================================================================== */
/* FastCGI output redirection functions. */
/* ==================================================================== */
/* ==================================================================== */
/************************************************************************/
/* msIO_needBinaryStdout() */
/* */
/* This function is intended to ensure that stdout is in binary */
/* mode. */
/* */
/* But don't do it we are using FastCGI. We will take care of */
/* doing it in the libfcgi library in that case for the normal */
/* cgi case, and for the fastcgi case the _setmode() call */
/* causes a crash. */
/************************************************************************/
int msIO_needBinaryStdout()
{
#if defined(_WIN32) && !defined(USE_FASTCGI)
if(_setmode( _fileno(stdout), _O_BINARY) == -1) {
msSetError(MS_IOERR,
"Unable to change stdout to binary mode.",
"msIO_needBinaryStdout()" );
return(MS_FAILURE);
}
#endif
return MS_SUCCESS;
}
/************************************************************************/
/* msIO_needBinaryStdin() */
/* */
/* This function is intended to ensure that stdin is in binary */
/* mode. */
/* */
/* But don't do it we are using FastCGI. We will take care of */
/* doing it in the libfcgi library in that case for the normal */
/* cgi case, and for the fastcgi case the _setmode() call */
/* causes a crash. */
/************************************************************************/
int msIO_needBinaryStdin()
{
#if defined(_WIN32) && !defined(USE_FASTCGI)
if(_setmode( _fileno(stdin), _O_BINARY) == -1) {
msSetError(MS_IOERR,
"Unable to change stdin to binary mode.",
"msIO_needBinaryStdin()" );
return(MS_FAILURE);
}
#endif
return MS_SUCCESS;
}
/* ==================================================================== */
/* memory buffer io handling functions. */
/* ==================================================================== */
/************************************************************************/
/* msIO_resetHandlers() */
/************************************************************************/
void msIO_resetHandlers()
{
msIOContextGroup *group = msIO_GetContextGroup();
if( group == NULL )
return;
if( strcmp(group->stdin_context.label,"buffer") == 0 ) {
msIOBuffer *buf = (msIOBuffer *) group->stdin_context.cbData;
if( buf->data != NULL )
free( buf->data );
free( buf );
}
if( strcmp(group->stdout_context.label,"buffer") == 0 ) {
msIOBuffer *buf = (msIOBuffer *) group->stdout_context.cbData;
if( buf->data != NULL )
free( buf->data );
free( buf );
}
if( strcmp(group->stderr_context.label,"buffer") == 0 ) {
msIOBuffer *buf = (msIOBuffer *) group->stderr_context.cbData;
if( buf->data != NULL )
free( buf->data );
free( buf );
}
msIO_installHandlers( NULL, NULL, NULL );
}
/************************************************************************/
/* msIO_installStdoutToBuffer() */
/************************************************************************/
void msIO_installStdoutToBuffer()
{
msIOContextGroup *group = msIO_GetContextGroup();
msIOContext context;
context.label = "buffer";
context.write_channel = MS_TRUE;
context.readWriteFunc = msIO_bufferWrite;
context.cbData = calloc(sizeof(msIOBuffer),1);
msIO_installHandlers( &group->stdin_context,
&context,
&group->stderr_context );
}
/************************************************************************/
/* msIO_pushStdoutToBufferAndGetOldContext() */
/* */
/* This function installs a temporary buffer I/O context and returns */
/* previously installed stdout handler. This previous stdout handler */
/* should later be restored with msIO_restoreOldStdoutContext(). */
/* This function can be for example used when wanting to ingest into */
/* libxml objects XML generated by msIO_fprintf() */
/************************************************************************/
msIOContext* msIO_pushStdoutToBufferAndGetOldContext()
{
msIOContextGroup *group = msIO_GetContextGroup();
msIOContext *old_context;
/* Backup current context */
old_context = (msIOContext*) msSmallMalloc(sizeof(msIOContext));
memcpy(old_context, &group->stdout_context, sizeof(msIOContext));
msIO_installStdoutToBuffer();
return old_context;
}
/************************************************************************/
/* msIO_restoreOldStdoutContext() */
/************************************************************************/
void msIO_restoreOldStdoutContext(msIOContext *context_to_restore)
{
msIOContextGroup *group = msIO_GetContextGroup();
msIOContext *prev_context = &group->stdout_context;
msIOBuffer* buffer;
/* Free memory associated to our temporary context */
assert( strcmp(prev_context->label, "buffer") == 0 );
buffer = (msIOBuffer* )prev_context->cbData;
msFree(buffer->data);
msFree(buffer);
/* Restore old context */
msIO_installHandlers( &group->stdin_context,
context_to_restore,
&group->stderr_context );
msFree(context_to_restore);
}
/************************************************************************/
/* msIO_installStdinFromBuffer() */
/************************************************************************/
void msIO_installStdinFromBuffer()
{
msIOContextGroup *group = msIO_GetContextGroup();
msIOContext context;
context.label = "buffer";
context.write_channel = MS_FALSE;
context.readWriteFunc = msIO_bufferRead;
context.cbData = calloc(sizeof(msIOBuffer),1);
msIO_installHandlers( &context,
&group->stdout_context,
&group->stderr_context );
}
/************************************************************************/
/* msIO_getAndStripStdoutBufferMimeHeaders() */
/* */
/************************************************************************/
hashTableObj* msIO_getAndStripStdoutBufferMimeHeaders()
{
/* -------------------------------------------------------------------- */
/* Find stdout buffer. */
/* -------------------------------------------------------------------- */
msIOContext *ctx = msIO_getHandler( (FILE *) "stdout" );
msIOBuffer *buf;
int start_of_mime_header, current_pos;
hashTableObj* hashTable;
if( ctx == NULL || ctx->write_channel == MS_FALSE
|| strcmp(ctx->label,"buffer") != 0 ) {
msSetError( MS_MISCERR, "Can't identify msIO buffer.",
"msIO_getAndStripStdoutBufferMimeHeaders" );
return NULL;
}
buf = (msIOBuffer *) ctx->cbData;
hashTable = msCreateHashTable();
/* -------------------------------------------------------------------- */
/* Loop over all headers. */
/* -------------------------------------------------------------------- */
current_pos = 0;
while( MS_TRUE ) {
int pos_of_column = -1;
char* key, *value;
start_of_mime_header = current_pos;
while( current_pos < buf->data_offset )
{
if( buf->data[current_pos] == '\r' )
{
if( current_pos + 1 == buf->data_offset ||
buf->data[current_pos + 1] != '\n' )
{
pos_of_column = -1;
break;
}
break;
}
if( buf->data[current_pos] == ':' )
{
pos_of_column = current_pos;
if( current_pos + 1 == buf->data_offset ||
buf->data[current_pos + 1] != ' ' )
{
pos_of_column = -1;
break;
}
}
current_pos++;
}
if( pos_of_column < 0 || current_pos == buf->data_offset ) {
msSetError( MS_MISCERR, "Corrupt mime headers.",
"msIO_getAndStripStdoutBufferMimeHeaders" );
msFreeHashTable(hashTable);
return NULL;
}
key = (char*) malloc( pos_of_column - start_of_mime_header + 1 );
memcpy( key, buf->data+start_of_mime_header, pos_of_column - start_of_mime_header);
key[pos_of_column - start_of_mime_header] = '\0';
value = (char*) malloc( current_pos - (pos_of_column+2) + 1 );
memcpy( value, buf->data+pos_of_column+2, current_pos - (pos_of_column+2));
value[current_pos - (pos_of_column+2)] = '\0';
msInsertHashTable( hashTable, key, value );
msFree( key );
msFree( value );
/* -------------------------------------------------------------------- */
/* Go to next line. */
/* -------------------------------------------------------------------- */
current_pos += 2;
if( current_pos == buf->data_offset )
{
msSetError( MS_MISCERR, "Corrupt mime headers.",
"msIO_getAndStripStdoutBufferMimeHeaders" );
msFreeHashTable(hashTable);
return NULL;
}
/* If next line is a '\r', this is the end of mime headers. */
if( buf->data[current_pos] == '\r' )
{
current_pos ++;
if( current_pos == buf->data_offset ||
buf->data[current_pos] != '\n' )
{
msSetError( MS_MISCERR, "Corrupt mime headers.",
"msIO_getAndStripStdoutBufferMimeHeaders" );
msFreeHashTable(hashTable);
return NULL;
}
current_pos ++;
break;
}
}
/* -------------------------------------------------------------------- */
/* Move data to front of buffer, and reset length. */
/* -------------------------------------------------------------------- */
memmove( buf->data, buf->data+current_pos,
buf->data_offset - current_pos );
buf->data[buf->data_offset - current_pos] = '\0';
buf->data_offset -= current_pos;
return hashTable;
}
/************************************************************************/
/* msIO_stripStdoutBufferContentType() */
/* */
/* Strip off Content-Type header from buffer, and return to */
/* caller. Returned string is the callers responsibility to */
/* call msFree() on to deallocate. This function will return */
/* NULL if there is no Content-Type header. */
/************************************************************************/
char *msIO_stripStdoutBufferContentType()
{
/* -------------------------------------------------------------------- */
/* Find stdout buffer. */
/* -------------------------------------------------------------------- */
msIOContext *ctx = msIO_getHandler( (FILE *) "stdout" );
msIOBuffer *buf;
char *content_type = NULL;
int end_of_ct, start_of_data;
if( ctx == NULL || ctx->write_channel == MS_FALSE
|| strcmp(ctx->label,"buffer") != 0 ) {
msSetError( MS_MISCERR, "Can't identify msIO buffer.",
"msIO_stripStdoutBufferContentType" );
return NULL;
}
buf = (msIOBuffer *) ctx->cbData;
/* -------------------------------------------------------------------- */
/* Return NULL if we don't have a Content-Type header. */
/* -------------------------------------------------------------------- */
if( buf->data_offset < 14
|| strncasecmp((const char*) buf->data,"Content-Type: ",14) != 0 )
return NULL;
/* -------------------------------------------------------------------- */
/* Find newline marker at end of content type argument. */
/* -------------------------------------------------------------------- */
end_of_ct = 13;
while( end_of_ct+1 < buf->data_offset
&& buf->data[end_of_ct+1] != '\r' )
end_of_ct++;
if( end_of_ct+1 == buf->data_offset ) {
msSetError( MS_MISCERR, "Corrupt Content-Type header.",
"msIO_stripStdoutBufferContentType" );
return NULL;
}
/* -------------------------------------------------------------------- */
/* Continue on to the start of data ... */
/* Go to next line and skip if empty. */
/* -------------------------------------------------------------------- */
start_of_data = end_of_ct+3;
if( start_of_data < buf->data_offset
&& buf->data[start_of_data] == '\r' )
start_of_data +=2;
if( start_of_data == buf->data_offset ) {
msSetError( MS_MISCERR, "Corrupt Content-Type header.",
"msIO_stripStdoutBufferContentType" );
return NULL;
}
/* -------------------------------------------------------------------- */
/* Copy out content type. Note we go against the coding guidelines */
/* here and use strncpy() instead of strlcpy() as the source */
/* buffer may not be NULL terminated - strlcpy() requires NULL */
/* terminated sources (see issue #4672). */
/* -------------------------------------------------------------------- */
content_type = (char *) malloc(end_of_ct-14+2);
strncpy( content_type, (const char *) buf->data + 14, end_of_ct - 14 + 2);
content_type[end_of_ct-14+1] = '\0';
/* -------------------------------------------------------------------- */
/* Move data to front of buffer, and reset length. */
/* -------------------------------------------------------------------- */
memmove( buf->data, buf->data+start_of_data,
buf->data_offset - start_of_data );
buf->data[buf->data_offset - start_of_data] = '\0';
buf->data_offset -= start_of_data;
return content_type;
}
/************************************************************************/
/* msIO_stripStdoutBufferContentHeaders() */
/* */
/* Strip off Content-* headers from buffer. */
/************************************************************************/
void msIO_stripStdoutBufferContentHeaders()
{
/* -------------------------------------------------------------------- */
/* Find stdout buffer. */
/* -------------------------------------------------------------------- */
msIOContext *ctx = msIO_getHandler( (FILE *) "stdout" );
msIOBuffer *buf;
int start_of_data;
if( ctx == NULL || ctx->write_channel == MS_FALSE
|| strcmp(ctx->label,"buffer") != 0 ) {
msSetError( MS_MISCERR, "Can't identify msIO buffer.",
"msIO_stripStdoutBufferContentHeaders" );
return;
}
buf = (msIOBuffer *) ctx->cbData;
/* -------------------------------------------------------------------- */
/* Exit if we don't have any content-* header. */
/* -------------------------------------------------------------------- */
if( buf->data_offset < 8