2 * uclient - ustream based protocol client library
4 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
27 #include <libubox/blobmsg.h>
30 #include "uclient-utils.h"
33 #define LIB_EXT "dylib"
38 static const char *user_agent = "uclient-fetch";
39 static const char *post_data;
40 static struct ustream_ssl_ctx *ssl_ctx;
41 static const struct ustream_ssl_ops *ssl_ops;
42 static int quiet = false;
43 static bool verify = true;
44 static bool default_certs = false;
45 static bool no_output;
46 static const char *output_file;
47 static int output_fd = -1;
50 static char *username;
51 static char *password;
52 static char *auth_str;
57 static void request_done(struct uclient *cl);
59 static int open_output_file(const char *path, bool create)
66 flags |= O_CREAT | O_EXCL;
69 if (!strcmp(output_file, "-"))
73 fprintf(stderr, "Writing to stdout\n");
76 return open(output_file, flags, 0644);
79 filename = uclient_get_url_filename(path, "index.html");
81 fprintf(stderr, "Writing to '%s'\n", filename);
82 ret = open(filename, flags, 0644);
88 static void header_done_cb(struct uclient *cl)
92 if (retries < 10 && uclient_http_redirect(cl)) {
94 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
101 switch (cl->status_code) {
106 output_fd = open_output_file(cl->url->location, true);
109 perror("Cannot open output file");
117 fprintf(stderr, "HTTP error %d\n", cl->status_code);
124 static void read_data_cb(struct uclient *cl)
129 if (!no_output && output_fd < 0)
133 len = uclient_read(cl, buf, sizeof(buf));
139 write(output_fd, buf, len);
143 static void msg_connecting(struct uclient *cl)
145 char addr[INET6_ADDRSTRLEN];
151 uclient_get_addr(addr, &port, &cl->remote_addr);
152 fprintf(stderr, "Connecting to %s:%d\n", addr, port);
155 static int init_request(struct uclient *cl)
160 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
163 cl->timeout_msecs = timeout * 1000;
165 rc = uclient_connect(cl);
171 rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
175 uclient_http_reset_headers(cl);
176 uclient_http_set_header(cl, "User-Agent", user_agent);
179 uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
180 uclient_write(cl, post_data, strlen(post_data));
183 rc = uclient_request(cl);
190 static void request_done(struct uclient *cl)
193 uclient_set_url(cl, *urls, auth_str);
195 error_ret = init_request(cl);
200 if (output_fd >= 0 && !output_file) {
204 uclient_disconnect(cl);
209 static void eof_cb(struct uclient *cl)
213 fprintf(stderr, "Connection reset prematurely\n");
216 fprintf(stderr, "Download completed (%d bytes)\n", out_bytes);
221 static void handle_uclient_error(struct uclient *cl, int code)
223 const char *type = "Unknown error";
227 case UCLIENT_ERROR_CONNECT:
228 type = "Connection failed";
231 case UCLIENT_ERROR_TIMEDOUT:
232 type = "Connection timed out";
235 case UCLIENT_ERROR_SSL_INVALID_CERT:
236 type = "Invalid SSL certificate";
240 case UCLIENT_ERROR_SSL_CN_MISMATCH:
241 type = "Server hostname does not match SSL certificate";
251 fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
259 static const struct uclient_cb cb = {
260 .header_done = header_done_cb,
261 .data_read = read_data_cb,
263 .error = handle_uclient_error,
266 static int usage(const char *progname)
269 "Usage: %s [options] <URL>\n"
271 " -q: Turn off status messages\n"
272 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
273 " --user=<user> HTTP authentication username\n"
274 " --password=<password> HTTP authentication password\n"
275 " --user-agent|-U <str> Set HTTP user agent\n"
276 " --post-data=STRING use the POST method; send STRING as the data\n"
277 " --spider|-s Spider mode - only check file existence\n"
278 " --timeout=N|-T N Set connect/request timeout to N seconds\n"
281 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
282 " --no-check-certificate: don't validate the server's certificate\n"
287 static void init_ca_cert(void)
292 glob("/etc/ssl/certs/*.crt", 0, NULL, &gl);
293 for (i = 0; i < gl.gl_pathc; i++)
294 ssl_ops->context_add_ca_crt_file(ssl_ctx, gl.gl_pathv[i]);
297 static void init_ustream_ssl(void)
301 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
305 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
309 ssl_ctx = ssl_ops->context_new(false);
312 static int no_ssl(const char *progname)
314 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
319 L_NO_CHECK_CERTIFICATE,
329 static const struct option longopts[] = {
330 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
331 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
332 [L_USER] = { "user", required_argument },
333 [L_PASSWORD] = { "password", required_argument },
334 [L_USER_AGENT] = { "user-agent", required_argument },
335 [L_POST_DATA] = { "post-data", required_argument },
336 [L_SPIDER] = { "spider", no_argument },
337 [L_TIMEOUT] = { "timeout", required_argument },
343 int main(int argc, char **argv)
345 const char *progname = argv[0];
348 bool has_cert = false;
354 while ((ch = getopt_long(argc, argv, "O:qsU:", longopts, &longopt_idx)) != -1) {
357 switch (longopt_idx) {
358 case L_NO_CHECK_CERTIFICATE:
361 case L_CA_CERTIFICATE:
364 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
369 username = strdup(optarg);
370 memset(optarg, '*', strlen(optarg));
375 password = strdup(optarg);
376 memset(optarg, '*', strlen(optarg));
388 timeout = atoi(optarg);
391 return usage(progname);
398 output_file = optarg;
407 timeout = atoi(optarg);
410 return usage(progname);
417 if (verify && !has_cert)
418 default_certs = true;
421 return usage(progname);
424 for (i = 0; i < argc; i++) {
425 if (!strncmp(argv[i], "https", 5))
426 return no_ssl(progname);
437 asprintf(&auth_str, "%s:%s", username, password);
443 fprintf(stderr, "Downloading '%s'\n", argv[0]);
445 cl = uclient_new(argv[0], auth_str, &cb);
447 fprintf(stderr, "Failed to allocate uclient context\n");
451 if (ssl_ctx && default_certs)
454 rc = init_request(cl);
456 /* no error received, we can enter main loop */
459 fprintf(stderr, "Failed to establish connection\n");
467 if (output_fd >= 0 && output_fd != STDOUT_FILENO)
471 ssl_ops->context_free(ssl_ctx);