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httpd: ssi: move checking file extensions against g_pcSSIExtensions array into its own function guarded by LWIP_HTTPD_SSI_BY_FILE_EXTENSION

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This commit is contained in:
goldsimon 2017-11-16 22:24:17 +01:00
parent 5d6b39f1ce
commit 8bd670430a
2 changed files with 55 additions and 27 deletions
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70
src/apps/httpd/httpd.c
View File

@ -2087,6 +2087,47 @@ badrequest:
} }
} }
#if LWIP_HTTPD_SSI && (LWIP_HTTPD_SSI_BY_FILE_EXTENSION == 1)
/* Check if SSI should be parsed for this file/URL
* (With LWIP_HTTPD_SSI_BY_FILE_EXTENSION == 2, this function can be
* overridden by an external implementation.)
*
* @return 1 for SSI, 0 for standard files
*/
static u8_t
http_uri_is_ssi(struct fs_file *file, const char *uri)
{
size_t loop;
u8_t tag_check = 0;
if (file != NULL) {
/* See if we have been asked for an shtml file and, if so,
enable tag checking. */
const char *ext = NULL, *sub;
char *param = (char *)strstr(uri, "?");
if (param != NULL) {
/* separate uri from parameters for now, set back later */
*param = 0;
}
sub = uri;
ext = uri;
for (sub = strstr(sub, "."); sub != NULL; sub = strstr(sub, ".")) {
ext = sub;
sub++;
}
for (loop = 0; loop < NUM_SHTML_EXTENSIONS; loop++) {
if (!lwip_stricmp(ext, g_pcSSIExtensions[loop])) {
tag_check = 1;
break;
}
}
if (param != NULL) {
*param = '?';
}
}
return tag_check;
}
#endif /* LWIP_HTTPD_SSI */
/** Try to find the file specified by uri and, if found, initialize hs /** Try to find the file specified by uri and, if found, initialize hs
* accordingly. * accordingly.
* *
@ -2193,33 +2234,8 @@ http_find_file(struct http_state *hs, const char *uri, int is_09)
} else { } else {
file = http_get_404_file(hs, &uri); file = http_get_404_file(hs, &uri);
} }
#if LWIP_HTTPD_SSI #if LWIP_HTTPD_SSI && LWIP_HTTPD_SSI_BY_FILE_EXTENSION
if (file != NULL) { tag_check = http_uri_is_ssi(file, uri);
/* See if we have been asked for an shtml file and, if so,
enable tag checking. */
const char *ext = NULL, *sub;
char *param = (char *)strstr(uri, "?");
if (param != NULL) {
/* separate uri from parameters for now, set back later */
*param = 0;
}
sub = uri;
ext = uri;
for (sub = strstr(sub, "."); sub != NULL; sub = strstr(sub, ".")) {
ext = sub;
sub++;
}
tag_check = 0;
for (loop = 0; loop < NUM_SHTML_EXTENSIONS; loop++) {
if (!lwip_stricmp(ext, g_pcSSIExtensions[loop])) {
tag_check = 1;
break;
}
}
if (param != NULL) {
*param = '?';
}
}
#endif /* LWIP_HTTPD_SSI */ #endif /* LWIP_HTTPD_SSI */
} }
if (file == NULL) { if (file == NULL) {

12
src/include/lwip/apps/httpd_opts.h
View File

@ -109,6 +109,18 @@
#define LWIP_HTTPD_SSI_RAW 0 #define LWIP_HTTPD_SSI_RAW 0
#endif #endif
/** Set this to 0 to prevent parsing the file extension at runtime to decide
* if a file should be scanned for SSI tags or not.
* Default is 1 (file extensions are checked using the g_pcSSIExtensions array)
* Set to 2 to override this runtime test function.
*
* This is enabled by default, but if you only use a newer version of makefsdata
* supporting the "-ssi" option, this info is already present in
*/
#if !defined LWIP_HTTPD_SSI_BY_FILE_EXTENSION || defined __DOXYGEN__
#define LWIP_HTTPD_SSI_BY_FILE_EXTENSION 1
#endif
/** Set this to 1 to support HTTP POST */ /** Set this to 1 to support HTTP POST */
#if !defined LWIP_HTTPD_SUPPORT_POST || defined __DOXYGEN__ #if !defined LWIP_HTTPD_SUPPORT_POST || defined __DOXYGEN__
#define LWIP_HTTPD_SUPPORT_POST 0 #define LWIP_HTTPD_SUPPORT_POST 0