summaryrefslogtreecommitdiffstats
path: root/fb-helper.c
blob: b5508873c77e45081388a24ff7f347f00aaa4594 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
/*
 * 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("    -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: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 '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;
}