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/*
* Description: This is intended as a helper for fb only.
*
* Synopsis: ./fb-helper <action> <URL> <file>
*
* action can be:
* d = download <URL>
* u = upload <file> to <URL>
*
* Author: Florian "Bluewind" Pritz <flo@xssn.at>
*
* Licensed under GPLv3
* (see COPYING for full license text)
*/
#define _POSIX_C_SOURCE 2
#include <stdio.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <libgen.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <curl/curl.h>
#include <curl/easy.h>
#define FORMAT_BYTES_BUFFER 16
#define FORMAT_TIME_BUFFER 16
#define SAMPLE_COUNT 15
#define UNUSED __attribute__((unused))
struct sample {
size_t size;
double time;
};
/* struct which holds the persistent data for progress_callback */
struct progressData {
struct timeval last;
double ullast;
int lastStringLength;
struct sample samples[SAMPLE_COUNT];
int current_sample;
};
struct options {
int debug;
char *url;
char *file;
char *apikeyfile;
};
/* load the contents of file fn into data */
int load_file(const char *fn, char **data, size_t *data_size)
{
FILE *fp;
size_t buf_size = 1024*1024; /* use 1MiB chunks */
fp = fopen(fn, "rb");
if (fp == NULL) {
perror("load_file");
return 1;
}
/* read the file in buf_size chunks and appened the data to *data */
while (!feof(fp)) {
char *tmp;
tmp = realloc(*data, *data_size + buf_size);
if (tmp == NULL) {
perror("load_file");
return 1;
}
*data = tmp;
*data_size += fread(*data + *data_size, sizeof(char), buf_size, fp);
if (ferror(fp)) {
perror("load_file");
return 1;
}
}
fclose(fp);
return 0;
}
void format_bytes(char *buf, int bufsize, double bytes)
{
double size = bytes;
int suffix_pos = 0;
static const char *suffix[] = {"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"};
static const int suffix_count = sizeof(suffix) / sizeof(suffix[0]);
static const double boundary = 2048.0;
for(suffix_pos = 0; suffix_pos + 1 < suffix_count; suffix_pos++) {
if(size <= boundary && size >= -boundary) {
break;
}
size /= 1024.0;
}
// don't print decimals for bytes
if (suffix_pos != 0)
snprintf(buf, bufsize, "%.2f%s", size, suffix[suffix_pos]);
else
snprintf(buf, bufsize, "%.0f%s", size, suffix[suffix_pos]);
}
void format_time(char *buf, int bufsize, time_t time)
{
int seconds = 0;
int minutes = 0;
int hours = 0;
seconds = time%60;
minutes = (time/60)%60;
hours = time/60/60;
if (hours > 0) {
snprintf(buf, bufsize, "%d:%02d:%02d", hours, minutes, seconds);
} else {
snprintf(buf, bufsize, "%02d:%02d", minutes, seconds);
}
}
int progress_callback(
void *cb_data,
double UNUSED dltotal, double UNUSED dlnow,
double ultotal, double ulnow
){
struct timeval now;
struct progressData *data = (struct progressData *)cb_data;
double timeSpent = 0;
int printed = 0;
char speed[FORMAT_BYTES_BUFFER];
char total[FORMAT_BYTES_BUFFER];
char eta[FORMAT_TIME_BUFFER];
time_t time_remaining = 0;
double ulspeed = 0.0;
size_t sample_total = 0;
double sample_time = 0.0;
if (0 == ulnow)
return 0;
/* upload complete; clean up */
if (ulnow >= ultotal) {
fprintf(stderr, "%*s\r", data->lastStringLength + 1, "");
return 0;
}
gettimeofday(&now, NULL);
/* calculate time between this and the last call in seconds */
timeSpent =
(double)(now.tv_sec - data->last.tv_sec) +
(double)(now.tv_usec - data->last.tv_usec) / 1E6;
/* don't refresh too often, catch if time went backwards */
if (timeSpent < 0.2 && timeSpent > -1.0)
return 0;
/* save a sample every time we update and average over all samples
* to reduce jumpiness */
data->samples[data->current_sample].size = ulnow - data->ullast;
data->samples[data->current_sample].time = timeSpent;
data->current_sample++;
if (data->current_sample >= SAMPLE_COUNT) {
data->current_sample = 0;
}
for (int i = 0; i < SAMPLE_COUNT; i++) {
if (data->samples[i].size != 0) {
sample_total += data->samples[i].size;
sample_time += data->samples[i].time;
}
}
ulspeed = sample_total / sample_time;
if (ulspeed < 1) {
snprintf(eta, sizeof(eta), "stalling");
} else {
time_remaining = (ultotal - ulnow) / ulspeed;
format_time(eta, sizeof(eta), time_remaining);
}
format_bytes((char *)&total, sizeof(total), ulnow);
format_bytes((char *)&speed, sizeof(speed), ulspeed);
/* print the progress */
printed = fprintf(stderr,
"\r%s/s uploaded: %.1f%% = %s; ETA: %s",
speed, /* upload speed */
ulnow * 100.0 / ultotal, /* percent uploaded */
total, /* total data uploaded */
eta
);
/* pad the string if the last one was longer to remove left over characters */
if (data->lastStringLength > printed)
fprintf(stderr, "%*s", data->lastStringLength - printed, "");
/* save current values for the next run */
data->ullast = ulnow;
data->last = now;
data->lastStringLength = printed;
return 0;
}
void display_help()
{
printf("Usage: fb-helper <options>\n");
printf("\n");
printf("Options:\n");
printf(" -D Print debugging information\n");
printf(" -h This help\n");
printf(" -u <url> URL of pastebin or URL to download\n");
printf(" -f <file> File to upload to URL\n");
printf(" -F key=value Post key=value\n");
printf(" -a <file> Path to API key file\n");
}
int main(int argc, char *argv[])
{
CURL *curl = NULL;
CURLcode res;
struct curl_httppost *formpost = NULL;
struct curl_httppost *lastptr = NULL;
struct curl_slist *headerlist = NULL;
static const char buf[] = "Expect:";
char *userAgent = "fb-client/"VERSION;
struct progressData cb_data = {
.last = {.tv_sec = 0, .tv_usec = 0},
.ullast = 0.0,
.lastStringLength = 0,
.current_sample = 0
};
char *data = NULL;
int ret = 0;
int opt;
struct options options = {
.debug = 0,
.file = NULL,
.url = NULL,
.apikeyfile = NULL
};
if (argc == 1) {
display_help();
exit(0);
}
while ((opt = getopt(argc, argv, "Du:f:F:m:a:h")) != -1) {
switch (opt) {
case 'D': options.debug = 1; break;
case 'u': options.url = optarg; break;
case 'f': options.file = optarg; break;
case 'F':
{
char *save = NULL;
char *key = strtok_r(optarg, "=", &save);
char *value = strtok_r(save, "=", &save);
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, key,
CURLFORM_PTRCONTENTS, value,
CURLFORM_END);
}
break;
case 'a': options.apikeyfile = optarg; break;
case 'h':
display_help();
exit(0);
break;
default:
fprintf(stderr, "Error: unknown option %c", opt);
exit(1);
}
}
/* initialize curl */
if (curl_global_init(CURL_GLOBAL_ALL) != 0) {
fprintf(stderr, "Error initializing curl");
ret = 10;
goto cleanup;
}
curl = curl_easy_init();
if(!curl) {
fprintf(stderr, "Error initializing curl");
ret = 1;
goto cleanup;
}
if (options.debug > 0) {
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
}
if (options.apikeyfile) {
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "apikey",
CURLFORM_FILECONTENT, options.apikeyfile,
CURLFORM_END);
} else {
/* use .netrc settings for authentication if available */
curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
}
/* if we have a file to upload, add it as a POST request */
if (options.file) {
struct stat statbuf;
if(stat(options.file, &statbuf) == -1) {
fprintf(stderr, "fb-helper: %s: ", options.file);
perror(NULL);
ret = 1;
goto cleanup;
}
/* load files with 0 size (/proc files for example) into memory so we can
* determine their real length */
if (statbuf.st_size == 0) {
size_t data_size = 0;
if (load_file(options.file, &data, &data_size) != 0) {
ret = 1;
goto cleanup;
}
if (data_size == 0) {
fprintf(stderr, "Error: skipping 0-byte file: \"%s\"\n", options.file);
ret = 1;
goto cleanup;
}
/* Fill in the file upload field */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "file",
CURLFORM_BUFFER, basename(options.file),
CURLFORM_BUFFERPTR, data,
CURLFORM_BUFFERLENGTH, (char *)data_size,
CURLFORM_END);
} else {
/* Fill in the file upload field */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "file",
CURLFORM_FILE, options.file,
CURLFORM_END);
}
if (isatty(fileno(stderr)) == 1) {
/* display progress bar*/
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0);
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &cb_data);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
}
}
curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
/* initialize custom header list (stating that Expect: 100-continue is not
wanted */
headerlist = curl_slist_append(headerlist, buf);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
curl_easy_setopt(curl, CURLOPT_URL, options.url);
curl_easy_setopt(curl, CURLOPT_USERAGENT, userAgent);
/* bail if the upload stalls for 30 seconds */
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 1L);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 30L);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10L);
/* save time for progress calculation */
gettimeofday(&cb_data.last, NULL);
/* run the request */
res = curl_easy_perform(curl);
/* handle curl errors */
if (res != 0) {
fprintf(stderr, "\n%s\n", curl_easy_strerror(res));
ret = 1;
goto cleanup;
}
cleanup:
if (curl)
curl_easy_cleanup(curl);
if (formpost)
curl_formfree(formpost);
curl_slist_free_all (headerlist);
curl_global_cleanup();
free(data);
return ret;
}
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