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lighttpd2/src/main/pattern.c

195 lines
4.8 KiB

#include <lighttpd/base.h>
liPattern *li_pattern_new(const gchar* str) {
GArray *pattern;
liPatternPart part;
gchar *c;
gboolean encoded;
pattern = g_array_new(FALSE, TRUE, sizeof(liPatternPart));
for (c = (gchar*)str; *c;) {
if (*c == '$') {
/* $n, PATTERN_NTH */
c++;
if (*c >= '0' && *c <= '9') {
part.type = PATTERN_NTH;
part.data.ndx = *c - '0';
g_array_append_val(pattern, part);
c++;
} else {
/* parse error */
li_pattern_free((liPattern*)pattern);
return NULL;
}
} else if (*c == '%') {
c++;
if (*c >= '0' && *c <= '9') {
/* %n, PATTERN_NTH_PREV */
part.type = PATTERN_NTH_PREV;
part.data.ndx = *c - '0';
g_array_append_val(pattern, part);
c++;
} else if (*c == '{') {
/* %{var}, PATTERN_VAR */
guint len;
c++;
encoded = FALSE;
if (g_str_has_prefix(c, "enc:")) {
/* %{enc:var}, PATTERN_VAR_ENCODED */
c += sizeof("enc:")-1;
encoded = TRUE;
}
for (len = 0; *c != '\0' && *c != '}'; c++)
len++;
if (*c == '\0') {
/* parse error */
li_pattern_free((liPattern*)pattern);
return NULL;
}
part.data.var = li_cond_lvalue_from_string(c-len, len);
if (part.data.var == LI_COMP_UNKNOWN) {
/* parse error */
li_pattern_free((liPattern*)pattern);
return NULL;
}
if (len && *c == '}') {
part.type = encoded ? PATTERN_VAR_ENCODED : PATTERN_VAR;
g_array_append_val(pattern, part);
c++;
} else {
/* parse error */
li_pattern_free((liPattern*)pattern);
return NULL;
}
} else {
/* parse error */
li_pattern_free((liPattern*)pattern);
return NULL;
}
} else {
/* string */
gchar *first = c;
c++;
for (;;) {
if (*c == '\0' || *c == '?' || *c == '$' || *c == '%') {
break;
} else if (*c == '\\') {
c++;
if (*c == '\\' || *c == '?' || *c == '$' || *c == '%') {
c++;
} else {
/* parse error */
li_pattern_free((liPattern*)pattern);
return NULL;
}
} else {
c++;
}
}
part.type = PATTERN_STRING;
part.data.str= g_string_new_len(first, c - first);
g_array_append_val(pattern, part);
}
}
return (liPattern*) pattern;
}
void li_pattern_free(liPattern *pattern) {
guint i;
GArray *arr = (GArray*) pattern;
for (i = 0; i < arr->len; i++) {
if (g_array_index(arr, liPatternPart, i).type == PATTERN_STRING)
g_string_free(g_array_index(arr, liPatternPart, i).data.str, TRUE);
}
g_array_free(arr, TRUE);
}
void li_pattern_eval(liVRequest *vr, GString *dest, liPattern *pattern, liPatternCB nth_callback, gpointer nth_data, liPatternCB nth_prev_callback, gpointer nth_prev_data) {
guint i;
gboolean encoded;
GString *str;
GString str_stack;
GArray *arr = (GArray*) pattern;
for (i = 0; i < arr->len; i++) {
liPatternPart *part = &g_array_index(arr, liPatternPart, i);
encoded = FALSE;
switch (part->type) {
case PATTERN_STRING:
g_string_append_len(dest, GSTR_LEN(part->data.str));
break;
case PATTERN_NTH:
if (nth_callback)
nth_callback(dest, part->data.ndx, nth_data);
break;
case PATTERN_NTH_PREV:
if (nth_prev_callback)
nth_prev_callback(dest, part->data.ndx, nth_prev_data);
break;
case PATTERN_VAR_ENCODED:
encoded = TRUE;
/* fall through */
case PATTERN_VAR:
switch (part->data.var) {
case LI_COMP_REQUEST_LOCALIP: str = vr->con->local_addr_str; break;
case LI_COMP_REQUEST_REMOTEIP: str = vr->con->remote_addr_str; break;
case LI_COMP_REQUEST_SCHEME:
if (vr->con->is_ssl)
str_stack = li_const_gstring(CONST_STR_LEN("https"));
else
str_stack = li_const_gstring(CONST_STR_LEN("http"));
str = &str_stack;
break;
case LI_COMP_REQUEST_PATH: str = vr->request.uri.path; break;
case LI_COMP_REQUEST_HOST: str = vr->request.uri.host; break;
case LI_COMP_REQUEST_QUERY_STRING: str = vr->request.uri.query; break;
case LI_COMP_REQUEST_METHOD: str = vr->request.http_method_str; break;
case LI_COMP_REQUEST_CONTENT_LENGTH:
g_string_printf(vr->con->wrk->tmp_str, "%"L_GOFFSET_FORMAT, vr->request.content_length);
str = vr->con->wrk->tmp_str;
break;
default: continue;
}
if (encoded)
li_string_encode_append(str->str, dest, LI_ENCODING_URI);
else
g_string_append_len(dest, GSTR_LEN(str));
break;
}
}
}
void li_pattern_array_cb(GString *pattern_result, guint8 nth_ndx, gpointer data) {
GString *str = g_array_index((GArray*)data, GString*, nth_ndx);
g_string_append_len(pattern_result, GSTR_LEN(str));
}
void li_pattern_regex_cb(GString *pattern_result, guint8 nth_ndx, gpointer data) {
gint start_pos, end_pos;
GMatchInfo *match_info = data;
if (!match_info)
return;
if (g_match_info_fetch_pos(match_info, (gint)nth_ndx, &start_pos, &end_pos))
g_string_append_len(pattern_result, g_match_info_get_string(match_info) + start_pos, end_pos - start_pos);
}