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#define _POSIX_C_SOURCE 200809L
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <err.h>
#include <curl/curl.h>
#include "string-util.h"
#include "auth.h"
#define BUFFER_SIZE (256 * 1024)
#define AUTH_HEADER_STR_PREFIX "Authorization: Bearer "
int http_init()
{
return curl_global_init(CURL_GLOBAL_ALL);
}
void http_cleanup()
{
curl_global_cleanup();
return;
}
struct write_result {
char *data;
int pos;
};
static size_t write_response(void *ptr, size_t size, size_t nmemb, void *stream)
{
struct write_result *result = (struct write_result *)stream;
if (result->pos + size * nmemb >= BUFFER_SIZE - 1) {
fprintf(stderr, "error: too small buffer\n");
return 0;
}
memcpy(result->data + result->pos, ptr, size * nmemb);
result->pos += size * nmemb;
return size * nmemb;
}
char *get_request(const char *url)
{
CURL *curl = NULL;
CURLcode status;
struct curl_slist *headers = NULL;
char *data = NULL;
long code;
curl = curl_easy_init();
if (!curl)
goto error;
data = malloc(BUFFER_SIZE);
if (!data)
goto error;
struct write_result write_result = {.data = data, .pos = 0};
if (auth_token) {
char *auth_header_val =
malloc(strlen(AUTH_HEADER_STR_PREFIX) + strlen(auth_token) + 1);
strlcpy(auth_header_val, AUTH_HEADER_STR_PREFIX,
sizeof(auth_header_val));
strlcat(auth_header_val, auth_token, sizeof(auth_header_val));
headers = curl_slist_append(headers, auth_header_val);
}
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_response);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &write_result);
status = curl_easy_perform(curl);
if (status != 0) {
fprintf(stderr, "get_request(): unable to request data from %s: %s\n",
url, curl_easy_strerror(status));
goto error;
}
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
if (code != 200) {
fprintf(stderr, "error: server responded with code %ld\n", code);
goto error;
}
data[write_result.pos] = '\0';
curl_slist_free_all(headers);
curl_easy_cleanup(curl);
return data;
error:
if (data)
free(data);
if (headers)
curl_slist_free_all(headers);
if (curl)
curl_easy_cleanup(curl);
return NULL;
}
char *post_request(const char *url, char *post_data)
{
CURL *curl = NULL;
CURLcode status;
struct curl_slist *headers = NULL;
char *data = NULL;
long code;
curl = curl_easy_init();
if (!curl)
goto error;
data = malloc(BUFFER_SIZE);
if (!data)
goto error;
struct write_result write_result = {.data = data, .pos = 0};
if (auth_token) {
char *auth_header_val =
malloc(strlen(AUTH_HEADER_STR_PREFIX) + strlen(auth_token) + 1);
strlcpy(auth_header_val, AUTH_HEADER_STR_PREFIX,
sizeof(auth_header_val));
strlcat(auth_header_val, auth_token, sizeof(auth_header_val));
headers = curl_slist_append(headers, auth_header_val);
}
if (post_data) {
char *content_type_header_val = "Content-Type: application/json";
headers = curl_slist_append(headers, content_type_header_val);
}
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_response);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &write_result);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_data);
status = curl_easy_perform(curl);
if (status != 0) {
fprintf(stderr, "post_request(): unable to request data from %s: %s\n",
url, curl_easy_strerror(status));
goto error;
}
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
if (code != 200) {
fprintf(stderr, "error: server responded with code %ld\n", code);
goto error;
}
data[write_result.pos] = '\0';
curl_slist_free_all(headers);
curl_easy_cleanup(curl);
return data;
error:
if (data)
free(data);
if (headers)
curl_slist_free_all(headers);
if (curl)
curl_easy_cleanup(curl);
return NULL;
}
struct post_request_arg {
char *url;
char *post_data;
void (*callback)(char *);
};
void *post_one_url(void *arg)
{
struct post_request_arg *req_args = (struct post_request_arg *)arg;
CURL *curl = NULL;
CURLcode status;
struct curl_slist *headers = NULL;
char *data = NULL;
long code;
curl = curl_easy_init();
if (!curl)
goto error;
data = malloc(BUFFER_SIZE);
if (!data)
goto error;
struct write_result write_result = {.data = data, .pos = 0};
if (auth_token) {
char *auth_header_val =
malloc(strlen(AUTH_HEADER_STR_PREFIX) + strlen(auth_token) + 1);
strlcpy(auth_header_val, AUTH_HEADER_STR_PREFIX,
sizeof(auth_header_val));
strlcat(auth_header_val, auth_token, sizeof(auth_header_val));
headers = curl_slist_append(headers, auth_header_val);
}
if (req_args->post_data) {
char *content_type_header_val = "Content-Type: application/json";
headers = curl_slist_append(headers, content_type_header_val);
}
curl_easy_setopt(curl, CURLOPT_URL, req_args->url);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_response);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &write_result);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, req_args->post_data);
status = curl_easy_perform(curl);
if (status != 0) {
fprintf(stderr, "post_request(): unable to request data from %s: %s\n",
req_args->url, curl_easy_strerror(status));
goto error;
}
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
if (code != 200) {
fprintf(stderr, "post_request(): server responded with code %ld\n", code);
goto error;
}
data[write_result.pos] = '\0';
curl_slist_free_all(headers);
curl_easy_cleanup(curl);
(*(req_args->callback))(data);
return NULL;
error:
if (data)
free(data);
if (headers)
curl_slist_free_all(headers);
if (curl)
curl_easy_cleanup(curl);
(*(req_args->callback))(NULL);
return NULL;
}
int http_post_async(char *url, char *post_data, void (*callback)(char *))
{
struct post_request_arg *arg;
pthread_t t;
arg = calloc(1, sizeof(struct post_request_arg));
if (!arg) {
err(1, "http_post_async(): calloc failed");
return -1;
}
arg->url = url;
arg->post_data = post_data;
arg->callback = callback;
return pthread_create(&t, NULL, post_one_url, arg);
}
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