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/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* $Id$
*
* Example source code to show how the callback function can be used to
* download data into a chunk of memory instead of storing it in a file.
* After successful download we use curl_easy_getinfo() calls to get the
* amount of downloaded bytes, the time used for the whole download, and
* the average download speed.
* On Linux you can create the download test files with:
* dd if=/dev/urandom of=file_1M.bin bs=1M count=1
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>
#define URL_BASE "http://speedtest.your.domain/"
#define URL_1M URL_BASE "file_1M.bin"
#define URL_2M URL_BASE "file_2M.bin"
#define URL_5M URL_BASE "file_5M.bin"
#define URL_10M URL_BASE "file_10M.bin"
#define URL_20M URL_BASE "file_20M.bin"
#define URL_50M URL_BASE "file_50M.bin"
#define URL_100M URL_BASE "file_100M.bin"
#define CHKSPEED_VERSION "1.0"
static size_t WriteCallback(void *ptr, size_t size, size_t nmemb, void *data)
{
/* we are not interested in the downloaded bytes itself,
so we only return the size we would have saved ... */
return (size_t)(size * nmemb);
}
int main(int argc, char *argv[])
{
CURL *curl_handle;
CURLcode res;
int prtsep = 0, prttime = 0;
char *url = URL_1M;
char *appname = argv[0];
if (argc > 1) {
/* parse input parameters */
for (argc--, argv++; *argv; argc--, argv++) {
if (strncasecmp(*argv, "-", 1) == 0) {
if (strncasecmp(*argv, "-H", 2) == 0) {
fprintf(stderr,
"\rUsage: %s [-m=1|2|5|10|20|50|100] [-t] [-x] [url]\n",
appname);
exit(1);
} else if (strncasecmp(*argv, "-V", 2) == 0) {
fprintf(stderr, "\r%s %s - %s\n",
appname, CHKSPEED_VERSION, curl_version());
exit(1);
} else if (strncasecmp(*argv, "-X", 2) == 0) {
prtsep = 1;
} else if (strncasecmp(*argv, "-T", 2) == 0) {
prttime = 1;
} else if (strncasecmp(*argv, "-M=", 3) == 0) {
int m = atoi(*argv + 3);
switch(m) {
case 1: url = URL_1M;
break;
case 2: url = URL_2M;
break;
case 5: url = URL_5M;
break;
case 10: url = URL_10M;
break;
case 20: url = URL_20M;
break;
case 50: url = URL_50M;
break;
case 100: url = URL_100M;
break;
default: fprintf(stderr, "\r%s: invalid parameter %s\n",
appname, *argv + 3);
exit(1);
}
} else {
fprintf(stderr, "\r%s: invalid or unknown option %s\n",
appname, *argv);
exit(1);
}
} else {
url = *argv;
}
}
}
/* print separator line */
if (prtsep) {
printf("-------------------------------------------------\n");
}
/* print localtime */
if (prttime) {
time_t t = time(NULL);
printf("Localtime: %s", ctime(&t));
}
/* init libcurl */
curl_global_init(CURL_GLOBAL_ALL);
/* init the curl session */
curl_handle = curl_easy_init();
/* specify URL to get */
curl_easy_setopt(curl_handle, CURLOPT_URL, url);
/* send all data to this function */
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteCallback);
/* some servers don't like requests that are made without a user-agent
field, so we provide one */
curl_easy_setopt(curl_handle, CURLOPT_USERAGENT,
"libcurl-speedchecker/" CHKSPEED_VERSION);
/* get it! */
res = curl_easy_perform(curl_handle);
if(CURLE_OK == res) {
double val;
/* check for bytes downloaded */
res = curl_easy_getinfo(curl_handle, CURLINFO_SIZE_DOWNLOAD, &val);
if((CURLE_OK == res) && val)
printf("Data downloaded: %0.0f bytes.\n", val);
/* check for total download time */
res = curl_easy_getinfo(curl_handle, CURLINFO_TOTAL_TIME, &val);
if((CURLE_OK == res) && val)
printf("Total download time: %0.3f sec.\n", val);
/* check for average download speed */
res = curl_easy_getinfo(curl_handle, CURLINFO_SPEED_DOWNLOAD, &val);
if((CURLE_OK == res) && val)
printf("Average download speed: %0.3f kbyte/sec.\n", val / 1024);
} else {
fprintf(stderr, "Error while fetching '%s' : %s\n",
url, curl_easy_strerror(res));
}
/* cleanup curl stuff */
curl_easy_cleanup(curl_handle);
/* we're done with libcurl, so clean it up */
curl_global_cleanup();
return 0;
}
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