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.
25 #include <libubox/blobmsg.h>
30 #define LIB_EXT "dylib"
35 static struct ustream_ssl_ctx *ssl_ctx;
36 static const struct ustream_ssl_ops *ssl_ops;
37 static int quiet = false;
38 static const char *output_file;
39 static int output_fd = -1;
42 static int open_output_file(const char *path, bool create)
53 if (!strcmp(output_file, "-"))
56 return open(output_file, flags, 0644);
59 /* Don't automatically overwrite files if the name is derived from the URL */
63 len = strcspn(path, ";&");
64 while (len > 0 && path[len - 1] == '/')
67 for (str = path + len - 1; str >= path; str--) {
76 filename = alloca(len + 1);
77 strncpy(filename, str, len);
80 filename = "index.html";
83 return open(filename, flags, 0644);
86 static void request_done(struct uclient *cl)
88 uclient_disconnect(cl);
92 static void example_header_done(struct uclient *cl)
96 struct blob_attr *cur;
99 if (retries < 10 && uclient_http_redirect(cl)) {
101 fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
109 fprintf(stderr, "Headers (%d): \n", cl->status_code);
110 blobmsg_for_each_attr(cur, cl->meta, rem) {
111 fprintf(stderr, "%s=%s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
115 switch (cl->status_code) {
118 output_fd = open_output_file(cl->url->location, true);
121 perror("Cannot open output file");
133 static void example_read_data(struct uclient *cl)
142 len = uclient_read(cl, buf, sizeof(buf));
146 write(output_fd, buf, len);
150 static void msg_connecting(struct uclient *cl)
152 char addr[INET6_ADDRSTRLEN];
158 uclient_get_addr(addr, &port, &cl->remote_addr);
159 fprintf(stderr, "Connecting to %s %s:%d\n", cl->url->host, addr, port);
162 static void init_request(struct uclient *cl)
166 uclient_http_set_request_type(cl, "GET");
170 static void example_eof(struct uclient *cl)
175 static void example_error(struct uclient *cl, int code)
178 fprintf(stderr, "Error %d!\n", code);
183 static const struct uclient_cb cb = {
184 .header_done = example_header_done,
185 .data_read = example_read_data,
186 .data_eof = example_eof,
187 .error = example_error,
190 static int usage(const char *progname)
193 "Usage: %s [options] <URL>\n"
195 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
198 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
199 " --no-check-certificate: don't validate the server's certificate\n"
205 static void init_ustream_ssl(void)
209 dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
213 ssl_ops = dlsym(dlh, "ustream_ssl_ops");
217 ssl_ctx = ssl_ops->context_new(false);
220 static int no_ssl(const char *progname)
222 fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
227 L_NO_CHECK_CERTIFICATE,
231 static const struct option longopts[] = {
232 [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
233 [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
237 int main(int argc, char **argv)
239 const char *progname = argv[0];
247 while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
250 switch (longopt_idx) {
251 case L_NO_CHECK_CERTIFICATE:
254 case L_CA_CERTIFICATE:
256 ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
259 return usage(progname);
263 output_file = optarg;
269 return usage(progname);
277 return usage(progname);
279 if (!strncmp(argv[0], "https", 5) && !ssl_ctx)
280 return no_ssl(progname);
284 cl = uclient_new(argv[0], NULL, &cb);
286 fprintf(stderr, "Failed to allocate uclient context\n");
291 uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
300 ssl_ops->context_free(ssl_ctx);