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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;
typedef struct msIOContextGroup_t
{
msIOContext stdin_context;
msIOContext stdout_context;
msIOContext stderr_context;
int 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()
{
int 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;
}
/************************************************************************/
/* msIO_getHandler() */
/************************************************************************/
msIOContext *msIO_getHandler( FILE * fp )
{
int 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;
}
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
msIO_fprintf(stdout,"%s: ",header);
msIO_vfprintf(stdout,value,args);
msIO_fprintf(stdout,"\n");
#ifdef MOD_WMS_ENABLED
}
#endif
}
void msIO_sendHeaders ()
{
#ifdef MOD_WMS_ENABLED
msIOContext *ioctx = msIO_getHandler (stdout);
if(ioctx && !strcmp(ioctx->label,"apache")) return;
#endif // !MOD_WMS_ENABLED
msIO_printf ("\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], *largerBuf = NULL;
#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;
}
#else
#ifdef va_copy
va_copy( args_copy, ap );
#else
args_copy = ap;
#endif /* va_copy */
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);
#endif /* HAVE_VSNPRINTF */
if (return_val < 0)
return -1;
context = msIO_getHandler( fp );
if( context == NULL )
return_val = fwrite( largerBuf?largerBuf:workBuf, 1, return_val, fp );
else
return_val = msIO_contextWrite( context,
largerBuf?largerBuf:workBuf,
return_val );
msFree(largerBuf);
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;
}
/* ==================================================================== */
/* ==================================================================== */
/* Stuff related to having a gdIOCtx operate through the msIO */
/* layer. */
/* ==================================================================== */
/* ==================================================================== */
typedef struct {
#ifdef USE_GD
gdIOCtx gd_io_ctx;
#endif
msIOContext *ms_io_ctx;
} msIO_gdIOCtx;
#ifdef USE_GD
/************************************************************************/
/* msIO_gd_putC() */
/* */
/* A GD IO context callback to put a character, redirected */
/* through the msIO output context. */
/************************************************************************/
static void msIO_gd_putC( gdIOCtx *cbData, int out_char )
{
msIO_gdIOCtx *merged_context = (msIO_gdIOCtx *) cbData;
char out_char_as_char = (char) out_char;
msIO_contextWrite( merged_context->ms_io_ctx, &out_char_as_char, 1 );
}
/************************************************************************/
/* msIO_gd_putBuf() */
/* */
/* The GD IO context callback to put a buffer of data, */
/* redirected through the msIO output context. */
/************************************************************************/
static int msIO_gd_putBuf( gdIOCtx *cbData, const void *data, int byteCount )
{
msIO_gdIOCtx *merged_context = (msIO_gdIOCtx *) cbData;
return msIO_contextWrite( merged_context->ms_io_ctx, data, byteCount );
}
#endif
/************************************************************************/
/* msIO_getGDIOCtx() */
/* */
/* The returned context should be freed with free() when no */
/* longer needed. */
/************************************************************************/
#ifdef USE_GD
gdIOCtx *msIO_getGDIOCtx( FILE *fp )
{
msIO_gdIOCtx *merged_context;
msIOContext *context = msIO_getHandler( fp );
if( context == NULL )
return NULL;
merged_context = (msIO_gdIOCtx *) calloc(1,sizeof(msIO_gdIOCtx));
merged_context->gd_io_ctx.putC = msIO_gd_putC;
merged_context->gd_io_ctx.putBuf = msIO_gd_putBuf;
merged_context->ms_io_ctx = context;
return (gdIOCtx *) merged_context;
}
#endif
/* ==================================================================== */
/* ==================================================================== */
/* FastCGI output redirection functions. */
/* ==================================================================== */
/* ==================================================================== */
#ifdef USE_FASTCGI
#define NO_FCGI_DEFINES
#include "fcgi_stdio.h"
/************************************************************************/
/* msIO_fcgiRead() */
/* */
/* This is the default implementation via stdio. */
/************************************************************************/
static int msIO_fcgiRead( void *cbData, void *data, int byteCount )
{
return FCGI_fread( data, 1, byteCount, (FCGI_FILE *) cbData );
}
/************************************************************************/
/* msIO_fcgiWrite() */
/* */
/* This is the default implementation via stdio. */
/************************************************************************/
static int msIO_fcgiWrite( void *cbData, void *data, int byteCount )
{
return FCGI_fwrite( data, 1, byteCount, (FCGI_FILE *) cbData );
}
/************************************************************************/
/* msIO_installFastCGIRedirect() */
/************************************************************************/
int msIO_installFastCGIRedirect()
{
msIOContext stdin_ctx, stdout_ctx, stderr_ctx;
stdin_ctx.label = "fcgi";
stdin_ctx.write_channel = MS_FALSE;
stdin_ctx.readWriteFunc = msIO_fcgiRead;
stdin_ctx.cbData = (void *) FCGI_stdin;
stdout_ctx.label = "fcgi";
stdout_ctx.write_channel = MS_TRUE;
stdout_ctx.readWriteFunc = msIO_fcgiWrite;
stdout_ctx.cbData = (void *) FCGI_stdout;
stderr_ctx.label = "fcgi";
stderr_ctx.write_channel = MS_TRUE;
stderr_ctx.readWriteFunc = msIO_fcgiWrite;
stderr_ctx.cbData = (void *) FCGI_stderr;
msIO_installHandlers( &stdin_ctx, &stdout_ctx, &stderr_ctx );
return MS_TRUE;
}
#endif
/************************************************************************/
/* 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_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_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] != 10 )
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 ... skipping two newline */
/* markers. */
/* -------------------------------------------------------------------- */
start_of_data = end_of_ct+2;
while( start_of_data < buf->data_offset
&& buf->data[start_of_data] != 10 )
start_of_data++;
if( start_of_data == buf->data_offset )
{
msSetError( MS_MISCERR, "Corrupt Content-type header.",
"msIO_stripStdoutBufferContentType" );
return NULL;
}
start_of_data++;
/* -------------------------------------------------------------------- */
/* Copy out content type. */
/* -------------------------------------------------------------------- */
content_type = (char *) malloc(end_of_ct-14+2);
strlcpy( 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
|| strncasecmp((const char*) buf->data,"Content-",8) != 0 )
return;
/* -------------------------------------------------------------------- */
/* Loop over all content-* headers. */
/* -------------------------------------------------------------------- */
start_of_data = 0;
while( buf->data_offset > start_of_data
&& strncasecmp((const char*) buf->data+start_of_data,"Content-",8) == 0 )
{
/* -------------------------------------------------------------------- */
/* Find newline marker at end of content-* header argument. */
/* -------------------------------------------------------------------- */
start_of_data +=7;
while( start_of_data+1 < buf->data_offset
&& buf->data[start_of_data+1] != 10 )
start_of_data++;
if( start_of_data+1 == buf->data_offset )
{
msSetError( MS_MISCERR, "Corrupt Content-* header.",
"msIO_stripStdoutBufferContentHeaders" );
return;
}
start_of_data +=2;
}
/* -------------------------------------------------------------------- */
/* Continue on to the start of data ... skipping two newline */
/* markers. */
/* -------------------------------------------------------------------- */
while( start_of_data < buf->data_offset
&& buf->data[start_of_data] != 10 )
start_of_data++;
if( start_of_data == buf->data_offset )
{
msSetError( MS_MISCERR, "Corrupt Content-* header.",
"msIO_stripStdoutBufferContentHeaders" );
return;
}
start_of_data++;
/* -------------------------------------------------------------------- */
/* 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;
}
/************************************************************************/
/* msIO_bufferWrite() */
/************************************************************************/