SuperNovaa41/isbn-lookup
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Compare commits

merge into: SuperNovaa41:testing
Branches Tags
SuperNovaa41:master
SuperNovaa41:testing
...
pull from: SuperNovaa41:master
Branches Tags
SuperNovaa41:testing
SuperNovaa41:master

No commits in common. "testing" and "master" have entirely different histories.
testing ... master

13 changed files with 792 additions and 361 deletions
Show Stats Expand all files Collapse all files

339
LICENSE Normal file
View File

@ -0,0 +1,339 @@
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable. However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions. You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.
7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

28
Makefile
View File

@ -1,24 +1,6 @@
CC=gcc all: src/*.c
CFLAGS= -c -g -Wall gcc src/main.c src/json.c src/curl.c src/db.c -lsqlite3 -lcurl -lcjson -o isbn -Wall
mkdir -p build
LDLIBS = -lcurl -lcjson -lsqlite3 -lm mv isbn build
TARGET := isbn-lookup
BUILD_DIR := ./build
SRC_DIRS := ./src
SRCS := $(shell find $(SRC_DIRS) -name '*.c')
OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
$(BUILD_DIR)/$(TARGET): $(OBJS)
$(CC) $(OBJS) -o $@ $(LDLIBS)
$(BUILD_DIR)/%.c.o: %.c
mkdir -p $(dir $@)
$(CC) $(CFLAGS) -c $< -o $@
.PHONY: clean
clean: clean:
rm -rf $(BUILD_DIR) rm -rf build

17
README.md Normal file
View File

@ -0,0 +1,17 @@
# ISBN Lookup tool
Just a simple tool that allows you to seek the details of a book using its ISBN10 or ISBN13.
Uses [Open Library](https://openlibrary.org) for the ISBN lookup API.
## Building
Requires `libcurl` and `cJSON`.
Simply run `make`.
## Usage
`./isbn [isbn]`

77
src/curl.c
View File

@ -3,82 +3,65 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include "include/curl.h" #include "curl.h"
#define API_URL "https://openlibrary.org/search.json?page=1&q=" #define BASE_URL_SIZE 38
#define API_URL_LEN 45
static void setup_api_link(const char* isbn, char** buf) void init_string(string* s)
{ {
size_t buffer_len; s->len = 0;
s->buf = malloc(s->len + 1);
buffer_len = API_URL_LEN + strlen(isbn); if (NULL == s->buf) {
(*buf) = malloc(sizeof(char) * buffer_len); fprintf(stderr, "malloc() failed!\n");
strncpy((*buf), API_URL, API_URL_LEN + 1);
strncpy((*buf)+ API_URL_LEN, isbn, strlen(isbn));
(*buf)[buffer_len] = '\0';
}
#undef API_URL
#undef API_URL_LEN
static void init_get_response(get_response* buf)
{
buf->len = 0;
buf->buf = malloc(buf->len + 1);
if (!(buf->buf)) {
perror("malloc");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
buf->buf[0] = '\0'; s->buf[0] = '\0';
} }
void free_get_response(get_response* buf) size_t writefunc(void* ptr, size_t size, size_t nmemb, string* s)
{ {
free(buf->buf); size_t new_len = s->len + (size * nmemb);
} s->buf = realloc(s->buf, new_len + 1);
if (NULL == s->buf) {
static size_t curl_write_response(void* ptr, size_t size, size_t nmemb, get_response* buf) fprintf(stderr, "realloc() failed!\n");
{
size_t new_len = buf->len + (size * nmemb);
buf->buf = realloc(buf->buf, new_len + 1);
if (!(buf->buf)) {
perror("realloc");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
memcpy(buf->buf + buf->len, ptr, size * nmemb); memcpy(s->buf + s->len, ptr, size * nmemb);
buf->buf[new_len] = '\0'; s->buf[new_len] = '\0';
buf->len = new_len; s->len = new_len;
return size * nmemb; return size * nmemb;
} }
CURLcode book_api_call(const char* isbn, get_response* buf) CURLcode perform_book_get(char* isbn, string* s)
{ {
CURL* handler; CURL* handler;
char* base_url;
size_t finalurl_size = BASE_URL_SIZE + 15;
char finalurl[finalurl_size];
CURLcode result; CURLcode result;
char* request_url;
handler = curl_easy_init(); handler = curl_easy_init();
if (!handler) { if (!handler) {
perror("curl_easy_init"); fprintf(stderr, "cURL failed to initialize!\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
setup_api_link(isbn, &request_url); base_url = "https://openlibrary.org/search.json?q=";
init_get_response(buf);
curl_easy_setopt(handler, CURLOPT_URL, request_url); // Setup the URL for the request
snprintf(finalurl, finalurl_size, "%s%s", base_url, isbn);
curl_easy_setopt(handler, CURLOPT_URL, finalurl);
curl_easy_setopt(handler, CURLOPT_HTTPGET, 1L); curl_easy_setopt(handler, CURLOPT_HTTPGET, 1L);
curl_easy_setopt(handler, CURLOPT_WRITEFUNCTION, curl_write_response); curl_easy_setopt(handler, CURLOPT_WRITEFUNCTION, writefunc);
curl_easy_setopt(handler, CURLOPT_WRITEDATA, buf); curl_easy_setopt(handler, CURLOPT_WRITEDATA, s);
result = curl_easy_perform(handler); result = curl_easy_perform(handler);
// Always clean up
curl_easy_cleanup(handler); curl_easy_cleanup(handler);
return result; return result;
} }

40
src/curl.h Normal file
View File

@ -0,0 +1,40 @@
#ifndef CURL_H
#define CURL_H
/**
* struct string_t
* char* buf - The buffer containing the string data
* size_t len - The length of the buffer
*/
typedef struct string_t {
char* buf;
size_t len;
} string;
/**
* void init_string
* string* s - The string struct
*
* Initializes the string struct
*/
void init_string(string* s);
/**
* size_t writefunc
*
* The arguments from CURLOPT_WRITEFUNCTION
*
* Writes the cURL get into the string struct
*/
size_t writefunc(void* ptr, size_t size, size_t nmemb, string* s);
/**
* CURLcode perform_book_get
* char* isbn - The ISBN
* string* s - The string struct to place the GET output in
*
* Performs a GET request with the ISBN
*/
CURLcode perform_book_get(char* isbn, string* s);
#endif

199
src/db.c
View File

@ -1,167 +1,124 @@
#include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <stdbool.h>
#include <sqlite3.h> #include <sqlite3.h>
#include <string.h> #include <stdlib.h>
#include <math.h> #include <stdarg.h>
#include <cjson/cJSON.h>
#include <curl/curl.h>
#include "include/db.h"
static void open_db(sqlite3** db) #include "curl.h"
#include "json.h"
#include "db.h"
void do_db_entry(enum DB_OPTIONS option, ...)
{ {
int err; int rc;
sqlite3* db;
va_list args;
rc = sqlite3_open("books.db", &db);
if (rc != SQLITE_OK) {
fprintf(stderr, "Cannot open database: %s\n", sqlite3_errmsg(db));
sqlite3_close(db);
err = sqlite3_open("books.db", db);
if (err != SQLITE_OK) {
fprintf(stderr, "Cannot open db: %s\n", sqlite3_errmsg(*db));
sqlite3_close(*db);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
setup_db(db);
va_start(args, option);
switch(option) {
case ADD:
add_to_db(va_arg(args, book_t*), db);
break;
case REMOVE:
remove_from_db(va_arg(args, int), db);
break;
default:
fprintf(stderr, "Invalid db command given!\n");
break;
} }
va_end(args);
static int get_num_rows(sqlite3* db) sqlite3_close(db);
{
int rows = 0;
sqlite3_stmt* msg;
sqlite3_prepare(db, "SELECT * FROM books;", -1, &msg, NULL);
while (sqlite3_step(msg) == SQLITE_ROW)
rows++;
sqlite3_finalize(msg);
return rows;
} }
void setup_db(sqlite3* db) void setup_db(sqlite3* db)
{ {
int err; int rc;
char* err_buf = 0; char* err_msg = 0;
open_db(&db); rc = sqlite3_exec(db,
err = sqlite3_exec(db,
"CREATE TABLE IF NOT EXISTS books (id UNSIGNED INT PRIMARY KEY, \ "CREATE TABLE IF NOT EXISTS books (id UNSIGNED INT PRIMARY KEY, \
title TEXT, subtitle TEXT, isbn TEXT, authors TEXT, subjects TEXT, \ isbn TEXT, title TEXT, authors TEXT, imageurl TEXT, year_of_publication YEAR, \
langs TEXT, date_added TEXT, pub_date TEXT, \ page_length UNSIGNED INT, subjects TEXT, date_added TEXT, date_completed TEXT, \
image_code TEXT, year_of_pub YEAR, page_len UNSIGNED INT);", progress UNSIGNED TINYINT, publication_date TEXT, subtitle TEXT);",
0, 0, &err_buf); 0, 0, &err_msg);
if (err != SQLITE_OK) {
fprintf(stderr, "sqlite3_exec: %s\n", err_buf); if (rc != SQLITE_OK) {
sqlite3_free(err_buf); fprintf(stderr, "SQL error: %s\n", err_msg);
sqlite3_free(err_msg);
sqlite3_close(db); sqlite3_close(db);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
sqlite3_close(db);
} }
static void add_str_entry(char** dst, char** src, bool last)
{
size_t len;
len = strlen(*src) + strlen(*dst) + 2 + 1 + (last ? 0 : 2);
*dst = realloc(*dst, sizeof(char) * len);
*dst = strcat(*dst, "\"");
*dst = strcat(*dst, *src);
*dst = strcat(*dst, "\"");
if (!last)
*dst = strcat(*dst, ", ");
}
static void add_int_entry(char** dst, int src, bool last)
{
size_t len_int, len;
char* num;
len_int = (src == 0) ? 1 : floor(log10(abs(src))) + 1;
num = malloc(sizeof(char) * (len_int + 1));
snprintf(num, len_int + 1, "%d", src);
len = strlen(*dst) + len_int + 1 + (last ? 0 : 2);
*dst = realloc(*dst, sizeof(char) * len);
*dst = strcat(*dst, num);
if (!last)
strcat(*dst, ", ");
free(num);
}
static void string_cat_vals(char** dst, book_t* book, int id)
{
add_int_entry(dst, id, false);
add_str_entry(dst, &(book->title), false);
add_str_entry(dst, &(book->subtitle), false);
add_str_entry(dst, &(book->isbn), false);
add_str_entry(dst, &(book->authors), false);
add_str_entry(dst, &(book->subjects), false);
add_str_entry(dst, &(book->langs), false);
add_str_entry(dst, &(book->date_added), false);
add_str_entry(dst, &(book->pub_date), false);
add_str_entry(dst, &(book->image_code), false);
add_int_entry(dst, book->page_len, true);
*dst = realloc(*dst, sizeof(char) * (strlen(*dst) + 3));
strcat(*dst, ");");
}
#define INSERT_STR "INSERT INTO books (id, title, subtitle, isbn, authors, subjects, langs, date_added, pub_date, image_code, page_len) VALUES("
void add_to_db(book_t* book, sqlite3* db) void add_to_db(book_t* book, sqlite3* db)
{ {
int id, err; char* sql;
char* cmd; int asp_err, rc, entries = 0;
char* err_msg = 0; char* err_msg = 0;
open_db(&db); sqlite3_stmt* getmsg;
sqlite3_prepare(db, "SELECT * FROM BOOKS;", -1, &getmsg, NULL);
while (sqlite3_step(getmsg) == SQLITE_ROW)
entries++;
sqlite3_finalize(getmsg);
id = get_num_rows(db) + 4; entries++; // new id!!
cmd = malloc(sizeof(char) * (strlen(INSERT_STR) + 1)); asp_err = asprintf(&sql, "INSERT INTO books \
snprintf(cmd, strlen(INSERT_STR) + 1, "%s", INSERT_STR); (id, isbn, title, authors, imageurl, year_of_publication, \
page_length, subjects, date_added, publication_date, subtitle) \
VALUES(%d, \"%s\", \"%s\", \"%s\", \"%s\", %d, %d, \"%s\", \"%s\", \"%s\", \"%s\");",
entries, book->isbn, book->title, book->authors, book->image_url, book->year_of_publication,
book->page_len, book->subjects, book->date_added, book->publication_date, book->subtitle);
string_cat_vals(&cmd, book, id); if (-1 == asp_err) {
fprintf(stderr, "asprintf failed!\n");
exit(EXIT_FAILURE);
}
printf("%s\n", cmd); rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
if (rc != SQLITE_OK) {
err = sqlite3_exec(db, cmd, 0, 0, &err_msg); fprintf(stderr, "SQL error: %s\n", err_msg);
if (err != SQLITE_OK) {
fprintf(stderr, "sqlite3_exec: %s\n", err_msg);
sqlite3_free(err_msg); sqlite3_free(err_msg);
sqlite3_close(db); sqlite3_close(db);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
sqlite3_close(db);
free(cmd);
} }
#undef INSERT_STR
#define DEL_STR "DELETE FROM books WHERE id = "
void remove_from_db(int id, sqlite3* db) void remove_from_db(int id, sqlite3* db)
{ {
int err; char* sql;
char *cmd, *err_msg; int asp_err, rc;
char* err_msg = 0;
open_db(&db); asp_err = asprintf(&sql, "DELETE FROM books WHERE id = %d;", id);
if (-1 == asp_err) {
fprintf(stderr, "asprintf failed!\n");
exit(EXIT_FAILURE);
}
cmd = malloc(sizeof(char) * (strlen(DEL_STR) + 1)); rc = sqlite3_exec(db, sql, 0, 0, &err_msg);
snprintf(cmd, strlen(DEL_STR), "%s", DEL_STR); if (rc != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err_msg);
add_int_entry(&cmd, id, true);
err = sqlite3_exec(db, cmd, 0, 0, &err_msg);
if (err != SQLITE_OK) {
fprintf(stderr, "sqlite3_exec: %s\n", err_msg);
sqlite3_free(err_msg); sqlite3_free(err_msg);
sqlite3_close(db); sqlite3_close(db);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
sqlite3_close(db);
free(cmd);
} }
#undef DEL_STR

47
src/db.h Normal file
View File

@ -0,0 +1,47 @@
#ifndef DH_H
#define DH_H
enum DB_OPTIONS {
ADD,
REMOVE
};
/**
* void do_db_entry
*
* enum DB_OPTIONS option - The type of transaction being made to the DB
* VA args
* - Expects book_t if option is ADD
* - Expects int if option is REMOVE
*
* Handles the whole process of interacting with the database
*/
void do_db_entry(enum DB_OPTIONS option, ...);
/**
* void setup_db
* sqlite3* db - The database
*
* Just creates the database if it doesn't exist.
*/
void setup_db(sqlite3* db);
/**
* void add_to_db
* book_t* book - The struct full of book information
* sqlite3* db - The database
*
* Adds the book information to the database
*/
void add_to_db(book_t* book, sqlite3* db);
/**
* void remove_from_db
* int id - The id of the book to remove
* sqlite3* db - The database
*
* Removes the given ID (and its associated book) from the database.
*/
void remove_from_db(int id, sqlite3* db);
#endif

15
src/include/curl.h
View File

@ -1,15 +0,0 @@
#include <curl/curl.h>
#ifndef CURL_H
#define CURL_H
typedef struct {
char* buf;
size_t len;
} get_response;
void free_get_response(get_response* buf);
CURLcode book_api_call(const char* isbn, get_response* buf);
#endif

22
src/include/db.h
View File

@ -1,22 +0,0 @@
#include <sqlite3.h>
#ifndef DB_H
#define DB_H
typedef struct {
char *title, *subtitle, *isbn;
char *authors, *subjects, *langs;
char *date_added, *pub_date;
char *image_code;
int page_len;
} book_t;
void setup_db(sqlite3* db);
void add_to_db(book_t* book, sqlite3* db);
void remove_from_db(int id, sqlite3* db);
#endif

10
src/include/json.h
View File

@ -1,10 +0,0 @@
#include <cjson/cJSON.h>
#include "curl.h"
#ifndef JSON_H
#define JSON_H
void json_out(cJSON** json);
void get_json_book(get_response* resp, cJSON** query);
#endif

126
src/json.c
View File

@ -1,42 +1,116 @@
#include <curl/curl.h>
#include <cjson/cJSON.h> #include <cjson/cJSON.h>
#include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <stdbool.h> #include <string.h>
#include <time.h>
#include "include/curl.h" #include "curl.h"
#include "include/json.h" #include "json.h"
static bool check_valid_query(cJSON* query) {return (query->valueint != 0);} #define MAX_BUF_LEN 1024
#define FILE_OUT "book.json" void check_valid_query(cJSON* numfound)
void json_out(cJSON** json)
{ {
FILE* f = fopen(FILE_OUT, "w"); if (0 != numfound->valueint)
fprintf(f, "%s", cJSON_Print(*json)); return;
fclose(f); fprintf(stderr, "No ISBN found!\n");
exit(EXIT_FAILURE);
} }
#undef FILE_OUT
void get_json_book(get_response* resp, cJSON** query) void get_list(cJSON* bookinfo, char* in_str, char* json_value)
{ {
bool err; char* temp_str;
cJSON* json; size_t new_len;
cJSON* str_arr = cJSON_GetObjectItemCaseSensitive(bookinfo, json_value)->child;
json = cJSON_Parse(resp->buf); snprintf(in_str, strlen(str_arr->valuestring) + 1, "%s", str_arr->valuestring);
if (!json) { str_arr = str_arr->next;
const char* err_ptr = cJSON_GetErrorPtr();
if (err_ptr) while (NULL != str_arr) {
fprintf(stderr, "cJSON_Parse: %s\n", err_ptr); // The plus 1 is for the \0, the plus 2 is for the ", "
new_len = strlen(in_str) + strlen(str_arr->valuestring) + 1 + 2;
temp_str = malloc(sizeof(char) * new_len);
snprintf(temp_str, new_len, "%s, %s", in_str, str_arr->valuestring);
memcpy(in_str, temp_str, new_len);
free(temp_str);
str_arr = str_arr->next;
}
}
void get_image_link(cJSON* bookinfo, book_t* book)
{
int image_id = cJSON_GetObjectItemCaseSensitive(bookinfo, "cover_i")->valueint;
const char* begin = "https://covers.openlibrary.org/b/id/";
const char* end = "-L.jpg";
book->image_url = malloc(sizeof(char) * MAX_BUF_LEN);
sprintf(book->image_url, "%s%d%s", begin, image_id, end);
}
void set_list_values(cJSON* bookinfo, book_t* book)
{
char authors[MAX_BUF_LEN];
char subjects[MAX_BUF_LEN];
get_list(bookinfo, authors, "author_name");
get_list(bookinfo, subjects, "subject");
// Need to malloc, because we need to copy authors into the book struct
book->authors = (char*) malloc(sizeof(char) * (strlen(authors) + 1));
memcpy(book->authors, authors, strlen(authors) + 1);
book->subjects = (char*) malloc(sizeof(char) * (strlen(subjects) + 1));
memcpy(book->subjects, subjects, strlen(subjects) + 1);
}
void set_actual_values(cJSON* bookinfo, book_t* book, char* isbn)
{
book->isbn = isbn;
book->title = cJSON_GetObjectItemCaseSensitive(bookinfo, "title")->valuestring;
book->year_of_publication = cJSON_GetObjectItemCaseSensitive(bookinfo, "first_publish_year")->valueint;
book->page_len = cJSON_GetObjectItemCaseSensitive(bookinfo, "number_of_pages_median")->valueint;
book->subtitle = cJSON_GetObjectItemCaseSensitive(bookinfo, "subtitle")->valuestring;
book->publication_date = cJSON_GetObjectItemCaseSensitive(bookinfo, "publish_date")->child->valuestring;
get_image_link(bookinfo, book);
}
void set_current_date(book_t* book)
{
char date[MAX_BUF_LEN];
time_t t;
time(&t);
sprintf(date, "%s", ctime(&t));
book->date_added = (char*) malloc(sizeof(char) * (strlen(date) + 1));
memcpy(book->date_added, date, strlen(date) + 1);
}
void parse_json(string* s, char* isbn, book_t* book)
{
cJSON* json = cJSON_Parse(s->buf);
if (NULL == json) {
const char* error_ptr = cJSON_GetErrorPtr();
if (NULL != error_ptr)
fprintf(stderr, "JSON error: %s\n", error_ptr);
cJSON_Delete(json); cJSON_Delete(json);
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
err = check_valid_query(cJSON_GetObjectItemCaseSensitive(json, "numFound")); check_valid_query(cJSON_GetObjectItemCaseSensitive(json, "numFound"));
if (!err) {
fprintf(stderr, "ISBN not found!\n");
exit(EXIT_SUCCESS);
}
// first entry of the "docs" json entry, which is the search result cJSON* bookinfo = cJSON_GetObjectItemCaseSensitive(json, "docs")->child;
(*query) = cJSON_GetObjectItemCaseSensitive(json, "docs")->child;
}
set_current_date(book);
set_actual_values(bookinfo, book, isbn);
set_list_values(bookinfo, book);
}

46
src/json.h Normal file
View File

@ -0,0 +1,46 @@
#ifndef JSON_H
#define JSON_H
#define MAX_BUF_LEN 1024
typedef struct book_t {
char* isbn;
char* title;
char* authors;
char* image_url;
int year_of_publication;
int page_len;
char* subjects;
char* date_added;
char* publication_date;
char* subtitle;
} book_t;
/**
* void check_valid_query
* cJSON* numfound - The json entry that contains the numFound value
*
* Checks if there are any search results in this json entry
*/
void check_valid_query(cJSON* numfound);
/**
* void get_authors
* cJSON* bookinfo - The JSON entry that has all of the information about the book
* char* authors - The string to fill
*
* Takes the JSON entry from bookinfo and combines all of the authors into one final string
*/
void get_authors(cJSON* bookinfo, char* authors);
/**
* void parse_json
* string* s - The string struct
* char* isbn - The ISBN
* book_t* book - The struct to fill with book information
*
* Parses through the given JSON entry and gathers all of the information we need
*/
void parse_json(string* s, char* isbn, book_t* book);
#endif

181
src/main.c
View File

@ -1,110 +1,103 @@
#include <curl/curl.h>
#include <cjson/cJSON.h> #include <cjson/cJSON.h>
#include <argp.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <stdbool.h> #include <string.h>
#include <sqlite3.h>
#include <unistd.h>
#include "include/curl.h" #include "curl.h"
#include "include/db.h" #include "json.h"
#include "include/json.h" #include "db.h"
struct flags { #define MAX_BUF_LEN 1024
char* isbn;
bool json, db, print;
};
static void init_flags(struct flags* flags) {flags->json = false;flags->db = false;flags->print = false;} void do_ISBN_get(char* argv[])
const char* argp_program_version = "isbn-lookup 2.1";
const char* argp_program_bug_address = "supernovaa41@gmx.com";
static char doc[] = "Lookup details of a book from the ISBN. Using OpenLibrary API.";
static char args_doc[] = "<ISBN>";
static struct argp_option options[] = {
{"json", 'j', 0, 0, "output to json", 0},
{"db", 'd', 0, 0, "output to sqlite3 database", 0},
{0, 'p', 0, 0, "print the full json response", 0},
{0}
};
static error_t parse_opt(int key, char* arg, struct argp_state* state)
{ {
struct flags* flags = state->input; // want to hold a max of 14 so we can hold up to ISBN13s
switch (key) { char isbn_buf[14];
case 'j': book_t new_book;
if (flags->db) { CURLcode res;
fprintf(stderr, "-j and -d are mutually exclusive.\n"); size_t input_len = strlen(argv[1]);
if (!(13 == input_len || 10 == input_len)) {
fprintf(stderr, "Invalid ISBN submitted!\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
flags->json = true;
break;
case 'd':
if (flags->json) {
fprintf(stderr, "-j and -d are mutually exclusive.\n");
exit(EXIT_FAILURE);
}
flags->db = true;
break;
case 'p':
flags->print = true;
break;
case ARGP_KEY_ARG:
flags->isbn = arg;
break;
case ARGP_KEY_END:
if (state->arg_num < 1)
argp_usage(state);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = {options, parse_opt, args_doc, doc, 0, 0, 0}; // We must initialize cURL
struct flags flags; curl_global_init(CURL_GLOBAL_ALL);
// Grab the ISBN from argv
memcpy(isbn_buf, argv[1], 14);
// Setup the output string
string get_output;
init_string(&get_output);
// Perform the get request
res = perform_book_get(isbn_buf, &get_output);
if (0 != res) {
fprintf(stderr, "Failed to perform the get request!\n");
exit(EXIT_FAILURE);
}
// Now we want to parse the JSON input
parse_json(&get_output, isbn_buf, &new_book);
do_db_entry(ADD, &new_book);
// we need to free these strings
free(get_output.buf);
free(new_book.authors);
free(new_book.image_url);
}
void print_help_menu(char* program)
{
printf("%s - An ISBN lookup tool.\n", program);
printf("Author: Nathan Singer\n");
puts("\n");
puts("--help - Shows this message.");
puts("[isbn] -- Attempts to download a book from the given ISBN-10 or ISBN-13 input.");
puts("remove [id] -- Removes a book with the given ID from the book database.");
}
void process_args(char* argv[])
{
int id;
if (0 == strcmp(argv[1], "--help")) {
print_help_menu(argv[0]);
} else if (0 == strcmp(argv[1], "remove")) {
if (NULL == argv[2]) {
printf("Not enough arguments! Try typing %s --help\n", argv[0]);
exit(EXIT_FAILURE);
}
id = atoi(argv[2]);
if (0 == id) {
printf("Invalid book ID given!\n");
exit(EXIT_FAILURE);
}
do_db_entry(REMOVE, id);
} else {
// lets assume its an ISBN and let the other functions fail if its not
do_ISBN_get(argv);
}
}
int main(int argc, char* argv[]) int main(int argc, char* argv[])
{ {
get_response resp; if (1 == argc) {
cJSON* query; printf("Not enough arguments! Try typing %s --help\n", argv[0]);
return EXIT_FAILURE;
}
init_flags(&flags); process_args(argv);
argp_parse(&argp, argc, argv, 0, 0, &flags);
/*
//book_api_call("9780762437818", &resp);
book_api_call(flags.isbn, &resp);
if (flags.print)
puts(resp.buf);
get_json_book(&resp, &query);
free_get_response(&resp);
if (flags.json)
json_out(&query);
else
; // db out;
*/
book_t book;
book.title = "hi";
book.subtitle = "test";
book.isbn = "1234";
book.authors = "test";
book.subjects = "test";
book.langs = "eng";
book.date_added = "test";
book.pub_date = "test";
book.image_code = "test";
book.page_len = 1;
sqlite3* db;
setup_db(db);
add_to_db(&book, db);
return 0; return 0;