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/*
* HTML support functions for CUPS.
*
* Copyright © 2020-2024 by OpenPrinting.
* Copyright © 2007-2011 by Apple Inc.
* Copyright © 1997-2006 by Easy Software Products.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more
* information.
*/
/*
* Include necessary headers...
*/
#include "cgi-private.h"
/*
* Local globals...
*/
static const char *cgi_multipart = NULL;
/* Multipart separator, if any */
/*
* Local functions...
*/
static const char *cgi_null_passwd(const char *prompt);
/*
* 'cgiEndHTML()' - End a HTML page.
*/
void
cgiEndHTML(void)
{
/*
* Send the standard trailer...
*/
cgiCopyTemplateLang("trailer.tmpl");
}
/*
* 'cgiEndMultipart()' - End the delivery of a multipart web page.
*/
void
cgiEndMultipart(void)
{
if (cgi_multipart)
{
printf("\n%s--\n", cgi_multipart);
fflush(stdout);
}
}
/*
* 'cgiFormEncode()' - Encode a string as a form variable.
*/
char * /* O - Destination string */
cgiFormEncode(char *dst, /* I - Destination string */
const char *src, /* I - Source string */
size_t dstsize) /* I - Size of destination string */
{
char *dstptr, /* Pointer into destination */
*dstend; /* End of destination */
static const char *hex = /* Hexadecimal characters */
"0123456789ABCDEF";
/*
* Mark the end of the string...
*/
dstend = dst + dstsize - 1;
/*
* Loop through the source string and copy...
*/
for (dstptr = dst; *src && dstptr < dstend;)
{
switch (*src)
{
case ' ' :
/*
* Encode spaces with a "+"...
*/
*dstptr++ = '+';
src ++;
break;
case '&' :
case '%' :
case '+' :
/*
* Encode special characters with %XX escape...
*/
if (dstptr < (dstend - 2))
{
*dstptr++ = '%';
*dstptr++ = hex[(*src & 255) >> 4];
*dstptr++ = hex[*src & 15];
src ++;
}
break;
default :
/*
* Copy other characters literally...
*/
*dstptr++ = *src++;
break;
}
}
/*
* Nul-terminate the destination string...
*/
*dstptr = '\0';
/*
* Return the encoded string...
*/
return (dst);
}
/*
* 'cgiStartHTML()' - Start a HTML page.
*/
void
cgiStartHTML(const char *title) /* I - Title of page */
{
/*
* Disable any further authentication attempts...
*/
cupsSetPasswordCB(cgi_null_passwd);
/*
* Tell the client to expect UTF-8 encoded HTML...
*/
if (cgi_multipart)
puts(cgi_multipart);
puts("Content-Type: text/html;charset=utf-8\n");
/*
* Send a standard header...
*/
cgiSetVariable("TITLE", title);
cgiSetServerVersion();
cgiCopyTemplateLang("header.tmpl");
}
/*
* 'cgiStartMultipart()' - Start a multipart delivery of a web page.
*/
void
cgiStartMultipart(void)
{
puts("MIME-Version: 1.0\n"
"Content-Type: multipart/x-mixed-replace; boundary=\"CUPS-MULTIPART\"\n");
fflush(stdout);
cgi_multipart = "--CUPS-MULTIPART";
}
/*
* 'cgiSupportsMultipart()' - Does the browser support multi-part documents?
*/
int /* O - 1 if multi-part supported, 0 otherwise */
cgiSupportsMultipart(void)
{
/*
* Too many bug reports for browsers that don't support it, and too much pain
* to whitelist known-good browsers, so for now we just punt on multi-part
* support... :(
*/
return (0);
}
/*
* 'cgi_null_passwd()' - Return a NULL password for authentication.
*/
static const char * /* O - NULL */
cgi_null_passwd(const char *prompt) /* I - Prompt string (unused) */
{
(void)prompt;
fprintf(stderr, "DEBUG: cgi_null_passwd(prompt=\"%s\") called!\n",
prompt ? prompt : "(null)");
return (NULL);
}
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