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more error handling

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SEGV_MAPERR when request had no host, fixed

fixed file writing/reading potential errors and used mongoose functions
This commit is contained in:
swirl 2021-09-28 10:20:26 -04:00
parent 0ec0db6ccf
commit 87505c206e
1 changed files with 20 additions and 20 deletions
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40
main.c
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@ -56,14 +56,6 @@ bool paste_exists(char *link) {
return file_exists(get_paste_filename(link));
}
FILE *get_paste_file(char *link, const char *mode) {
return fopen(get_paste_filename(link), mode);
}
FILE *get_del_file(char *link, const char *mode) {
return fopen(get_del_filename(link), mode);
}
char *gen_random_link() {
srand(time(NULL));
char *short_link = malloc(17);
@ -123,14 +115,16 @@ void handle_post(struct mg_connection *nc, char *content, char *host, char *link
}
#endif
FILE *url = get_paste_file(short_link, "w+");
fputs(content, url);
fclose(url);
if (!mg_file_write(get_paste_filename(short_link), content, strlen(content))) {
fprintf(stderr, "failed to write to file %s", get_paste_filename(short_link));
return mg_http_reply(nc, 500, "", "failed to write data");
}
FILE *del = get_del_file(short_link, "w+");
char *del_key = gen_del_key(short_link);
fputs(del_key, del);
fclose(del);
if (!mg_file_write(get_del_filename(short_link), del_key, strlen(del_key))) {
fprintf(stderr, "failed to write to file %s", get_del_filename(short_link));
return mg_http_reply(nc, 500, "", "failed to write data");
}
char *del_header = malloc(256);
sprintf(del_header, "X-Delete-With: %s\r\n", del_key);
@ -140,9 +134,7 @@ void handle_post(struct mg_connection *nc, char *content, char *host, char *link
void handle_delete(struct mg_connection *nc, char *link, char *del_key) {
if (paste_exists(link)) {
FILE *del = get_del_file(link, "r");
char *key = malloc(256);
fgets(key, 255, del);
char *key = mg_file_read(get_del_filename(link), NULL);
if (strcmp(key, del_key) == 0) {
remove(get_paste_filename(link));
remove(get_del_filename(link));
@ -163,9 +155,17 @@ static void ev_handler(struct mg_connection *nc, int ev, void *p, void *f) {
snprintf(uri, hm->uri.len + 1, "%s", hm->uri.ptr);
trim(uri);
struct mg_str *mhost = mg_http_get_header(hm, "Host");
char *host = malloc(mhost->len + 1);
snprintf(host, mhost->len + 1, "%s", mhost->ptr);
struct mg_str *pmhost = mg_http_get_header(hm, "Host");
struct mg_str mhost;
if (pmhost == NULL) {
fprintf(stderr, "request sent with no Host header");
mhost = mg_str("<UNKNOWN DOMAIN>");
} else {
mhost = *pmhost;
}
char *host = malloc(mhost.len + 1);
snprintf(host, mhost.len + 1, "%s", mhost.ptr);
char *body = strdup(hm->body.ptr);