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Split things into pieces, continue implementation of mysql backend

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This commit is contained in:
Gérald Colangelo
2020-07-25 15:33:12 +02:00
parent 17fae01520
commit 66ae592e41
8 changed files with 117 additions and 67 deletions
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61
src/mysql_backend/mysql_backend.c Normal file
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/*
Copyright (c) 2020 Gérald Colangelo <gcolangelo@ospow.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../smart_records_internals.h"
#include "mysql_backend_internals.h"
int mysql_backend_open_records_base(void *ctx, char **error, const char *uri)
{
mysql_backend_ctx_t *c;
if (!ctx || !uri) {
set_error_and_fails("invalid arguments while opening records base");
}
c = (mysql_backend_ctx_t *)ctx;
c->uri = mysql_parse_uri(error, uri);
if (!c->uri)
goto failed;
if(!mysql_real_connect(c->mysql_obj, c->uri->host,
c->uri->user,
c->uri->passwd,
c->uri->db,
c->uri->port,
NULL,0)) {
set_error_and_fails(mysql_error(c->mysql_obj));
}
failed:
if(c->uri)
mysql_free_uri(c->uri);
return -1;
}
void *mysql_backend_init(char **error)
{
mysql_backend_ctx_t *ctx;
ctx = malloc(sizeof(mysql_backend_ctx_t));
ctx->mysql_obj = mysql_init(NULL);
return ctx;
}

13
src/mysql_backend/mysql_backend.h Normal file
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#ifndef _SMART_RECORDS_MYSQL_BACKEND_H
#define _SMART_RECORDS_MYSQL_BACKEND_H
#include <stdarg.h>
void *mysql_backend_init(char **error);
int mysql_backend_open_records_base(void *ctx, char **error, const char *uri);
int mysql_backend_write_record(void **ctx, char **error, va_list ap);
int mysql_backend_set_format(void **ctx, char **error, char *format);
int mysql_backend_close_records_base(void **ctx);
#endif

24
src/mysql_backend/mysql_backend_internals.h Normal file
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#ifndef MYSQL_BACKEND_INTERNALS_H
#define MYSQL_BACKEND_INTERNALS_H
#include <mysql.h>
#define URI_SCHEME "mysql://user[:password]@host[:port]/db_name.table"
typedef struct mysql_uri {
char *host;
char *user;
char *passwd;
char *db;
char *table;
unsigned int port;
} mysql_uri_t;
typedef struct mysql_backend_ctx_t {
MYSQL *mysql_obj;
mysql_uri_t *uri;
} mysql_backend_ctx_t;
void mysql_free_uri(mysql_uri_t * uri);
mysql_uri_t *mysql_parse_uri(char **error, const char *uri);
#endif

162
src/mysql_backend/mysql_backend_utils.c Normal file
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/*
Copyright (c) 2020 Gérald Colangelo <gcolangelo@ospow.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../smart_records_internals.h"
#include <mysql.h>
#include "mysql_backend_internals.h"
void mysql_free_uri(mysql_uri_t * uri)
{
if (!uri)
return;
if (uri->host)
free(uri->host);
if (uri->user)
free(uri->user);
if (uri->passwd)
free(uri->passwd);
if (uri->db)
free(uri->db);
if (uri->table)
free(uri->table);
free(uri);
}
mysql_uri_t *mysql_parse_uri(char **error, const char *uri)
{
int conv;
mysql_uri_t *r=NULL;
char *p1=NULL, *p2=NULL, *p3=NULL, *tmp=NULL;
if(!uri) {
set_error_and_fails("URI can't be null");
}
r = malloc(sizeof(mysql_uri_t));
memset(r,0,sizeof(mysql_uri_t));
/* Split the URI in 3 group: identifier, host identifier, db identifier */
conv = sscanf(uri, "mysql://%m[^@]@%m[^/]/%ms", &p1, &p2, &p3);
if (conv != 3) {
set_error_and_fails("URI doesn't respect the scheme");
}
/* Parse identifier */
/* We consider that 'login:' stands for empty password */
/* XXX: there's a leak here when : is present. Must fix !*/
conv = sscanf(p1, "%m[^:]%m[:]%ms", &r->user, &tmp, &r->passwd);
if (!conv) {
set_error_and_fails("Bad URI: no identifier provided");
}
else if (conv == 1) {
#ifdef _WITH_INTERACTIVE_TERMINAL // XXX: is there a way to detect this at runtime ?
char *tmp = malloc(128);
size_t n = 128, read;
fprintf(stdout, "Please, enter password for connection to %s\n", uri);
read = getline(&tmp, &n, stdin);
if (read >= 1)
/* Remove trailing \n */
r->passwd = strndup(tmp, strlen(tmp) - 1);
free(tmp);
#else
set_error_and_fails("No password provided and built without support of INTERACTIVE_TERMINAL");
#endif
}
free(p1);
p1 = NULL;
/* Parse host identifier */
conv = sscanf(p2, "%m[^:]:%d", &r->host, &r->port);
if (!conv) {
set_error_and_fails("Bad URI: need a port number after host:");
}
else if (conv == 1) {
r->port = 3306;
}
free(p2);
p2 = NULL;
/* Par db identifier */
conv = sscanf(p3, "%m[^.].%ms", &r->db, &r->table);
if (conv != 2) {
set_error_and_fails("Bad URI: need a database.table syntax");
}
free(p3);
p3 = NULL;
return r;
failed:
if (tmp)
free(tmp);
if (r)
mysql_free_uri(r);
if (p1)
free(p1);
if (p2)
free(p2);
if (p3)
free(p3);
return NULL;
}
#ifdef _TEST
char *tests[7][2] = {
{ "Every info provided",
"mysql://leon:bruxelles@lafrite:1024/STOCK_PATATE.avril" },
{ "Every info provided except password",
"mysql://leon@lafrite:1024/STOCK_PATATE.avril" },
{ "Every info provided but empty password",
"mysql://leon:@lafrite:1024/STOCK_PATATE.avril" },
{ "Every info provided except port number",
"mysql://leon:coin@lafrite/STOCK_PATATE.avril" },
{ "Bad URI #1", "mysql://lafrite/PATATE.avril" },
{ "Bad URI #1", "mysql://lafrite/" },
{ NULL, NULL },
};
int main(int ac, char **av)
{
mysql_uri_t *r;
char *error = NULL;
int i = 0;
while (tests[i][0]) {
printf("## %s ##\nURI: %s\nResult:\n", tests[i][0], tests[i][1]);
r = mysql_parse_uri(tests[i][1], &error);
if (r) {
printf("\tr->host=%s\n\tr->port=%d\n\tr->user=%s\n\tr->password=%s\n\tr->db=%s\n\tr->table=%s\n",
r->host, r->port, r->user, r->passwd, r->db, r->table);
mysql_free_uri(r);
} else {
if(error) {
printf("mysql_parse_uri : got error %s !\n", error);
free(error);
}
}
i++;
}
}
#endif