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Use PCRE to parse usernames

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FossilOrigin-Name: f38e94dcf4608b77e78cbab9bdd64d337fe13888f0672c04a0c87181ecd18dfa
This commit is contained in:
me@ow.nekobit.net 2022-02-26 06:17:41 +00:00
parent 5d34ac70aa
commit c8ee06b4a5
2 changed files with 31 additions and 24 deletions
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4
Makefile
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@ -2,8 +2,8 @@ CC ?= cc
GIT ?= git
MASTODONT_DIR = mastodont-c/
MASTODONT = $(MASTODONT_DIR)libmastodont.a
CFLAGS += -Wall -I $(MASTODONT_DIR)include/ -Wno-unused-variable -Wno-discarded-qualifiers
LDFLAGS = -L$(MASTODONT_DIR) -lcurl -lmastodont -lcjson
CFLAGS += -Wall -I $(MASTODONT_DIR)include/ -Wno-unused-variable -Wno-discarded-qualifiers $(shell pkg-config --cflags libcurl libcjson libpcre)
LDFLAGS = $(shell pkg-config --libs libcjson libcurl libpcre) -L$(MASTODONT_DIR) -lmastodont
SRC = $(wildcard src/*.c)
OBJ = $(patsubst %.c,%.o,$(SRC))
PAGES_DIR = static

51
src/reply.c
View file

@ -16,7 +16,7 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <regex.h>
#include <pcre.h>
#include <stdlib.h>
#include <string.h>
#include "reply.h"
@ -45,18 +45,21 @@ char* construct_post_box(char* reply_id,
return reply_html;
}
#define REGEX_REPLY "<a class=\"u-url mention\".*href=\"https:\\/\\/(.*)\\/.*\".*>@<span>(.*)<\\/span>"
//#define REGEX_REPLY "<a class=\"u-url mention\".*href=\"https:\\/\\/(.*)\\/.*\".*>@<span>(.*)<\\/span>"
#define REGEX_REPLY "<a class=\"u-url mention\".*?href=\"https:\\/\\/(.*?)\\/.*?\".*?>@<span>(.*?)<\\/span>"
#define REGEX_RESULTS_LEN 9
char* reply_status(char* id, struct mstdnt_status* status)
{
char* content = status->content;
size_t content_len = strlen(status->content);
char* stat_reply;
// Regex
regex_t regex;
regmatch_t pmatch[2];
regoff_t off_url, len_url, off_name, len_name;
pcre* re;
int re_results[REGEX_RESULTS_LEN];
int rc;
const char* error;
int erroffset;
int url_off, url_len, name_off, name_len;
// Replies
size_t replies_size, replies_size_orig;
char* replies = malloc(replies_size = strlen(status->account.acct)+2);
@ -67,38 +70,42 @@ char* reply_status(char* id, struct mstdnt_status* status)
replies[replies_size-1] = ' ';
// Compile regex
if (regcomp(&regex, REGEX_REPLY, REG_EXTENDED))
re = pcre_compile(REGEX_REPLY, 0, &error, &erroffset, NULL);
if (re == NULL)
{
fputs("Invalid regex!", stderr);
fprintf(stderr, "Couldn't parse regex at offset %d: %s\n", erroffset, error);
free(replies);
}
int j = 0;
for (int i = 0;; ++i)
for (int ind = 0;;)
{
if (regexec(&regex, content + j, 2, pmatch, 0))
rc = pcre_exec(re, NULL, content, content_len, ind, 0, re_results, REGEX_RESULTS_LEN);
if (rc < 0)
break;
off_url = pmatch[0].rm_so + j;
len_url = pmatch[0].rm_eo - pmatch[0].rm_so;
off_name = pmatch[1].rm_so + j;
len_name = pmatch[1].rm_eo - pmatch[1].rm_so;
// Read out
url_off = re_results[2];
url_len = re_results[3] - url_off;
name_off = re_results[4];
name_len = re_results[5] - name_off;
replies_size_orig = replies_size;
replies_size += len_url+2;
replies_size += url_len+name_len+3;
// Realloc string
replies = realloc(replies, replies_size+1);
j += off_url + len_url + off_name + len_name;
replies[replies_size_orig] = '@';
memcpy(replies + replies_size_orig + 1, content + off_url, len_url);
memcpy(replies + replies_size_orig + 1, content + name_off, name_len);
replies[replies_size_orig+1+name_len] = '@';
memcpy(replies + replies_size_orig + 1 + name_len + 1, content + url_off, url_len);
replies[replies_size-1] = ' ';
// Store to last result
ind = re_results[5];
}
replies[replies_size] = '\0';
stat_reply = construct_post_box(id, replies, NULL);
if (replies) free(replies);