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url.c
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url.c
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/*
* Metaann
*
* Copyright (C) 2014 Benjamin Moody
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <glib.h>
#include <gtk/gtk.h> /* for gtk_*_version */
#include <wfdb/wfdb.h>
#include <curl/curl.h>
#include "url.h"
#define ERROR_DOMAIN (g_quark_from_static_string("metaann-url"))
static CURL *curl;
static char error_buf[CURL_ERROR_SIZE];
static size_t append_to_str(void *ptr, size_t size, size_t nmemb,
void *stream)
{
if (stream)
g_string_append_len(stream, ptr, size * nmemb);
return (size * nmemb);
}
static char * request(const char *url, const char *postdata,
const char *username, const char *password,
int no_body, int *length, GError **err)
{
GString *str;
char *s;
int status;
if (length)
*length = 0;
if (!curl) {
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error_buf);
s = g_strdup_printf("metaann/%s (libwfdb/%s %s GTK+/%u.%u.%u)",
METAANN_VERSION, wfdbversion(), curl_version(),
gtk_major_version, gtk_minor_version,
gtk_micro_version);
curl_easy_setopt(curl, CURLOPT_USERAGENT, s);
g_free(s);
curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
}
curl_easy_setopt(curl, CURLOPT_URL, url);
if (username && password) {
s = g_strconcat(username, ":", password, NULL);
curl_easy_setopt(curl, CURLOPT_USERPWD, s);
g_free(s);
}
else {
curl_easy_setopt(curl, CURLOPT_USERPWD, NULL);
}
if (postdata) {
curl_easy_setopt(curl, CURLOPT_POST, 1L);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postdata);
}
else if (no_body) {
curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
}
else {
curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L);
}
str = g_string_new(NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &append_to_str);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, str);
strcpy(error_buf, "Unknown I/O error");
status = curl_easy_perform(curl);
if (status != 0) {
g_set_error(err, ERROR_DOMAIN, 1, "%s", error_buf);
g_string_free(str, TRUE);
return NULL;
}
if (length)
*length = str->len;
return g_string_free(str, FALSE);
}
gboolean url_head(const char *url, const char *username,
const char *password, GError **err)
{
char *s;
g_return_val_if_fail(url != NULL, FALSE);
g_return_val_if_fail(err == NULL || *err == NULL, FALSE);
s = request(url, NULL, username, password, 1, NULL, err);
g_free(s);
return (s != NULL);
}
char * url_get(const char *url, const char *username,
const char *password, int *length, GError **err)
{
g_return_val_if_fail(url != NULL, NULL);
g_return_val_if_fail(err == NULL || *err == NULL, NULL);
return request(url, NULL, username, password, 0, length, err);
}
char * url_post(const char *url, const char *postdata,
const char *username, const char *password,
int *length, GError **err)
{
g_return_val_if_fail(url != NULL, NULL);
g_return_val_if_fail(err == NULL || *err == NULL, NULL);
return request(url, postdata, username, password, 0, length, err);
}