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
;
56 static void request_done(struct uclient
*cl
);
58 static int open_output_file(const char *path
, bool create
)
65 flags
|= O_CREAT
| O_EXCL
;
68 if (!strcmp(output_file
, "-"))
72 fprintf(stderr
, "Writing to stdout\n");
75 return open(output_file
, flags
, 0644);
78 filename
= uclient_get_url_filename(path
, "index.html");
80 fprintf(stderr
, "Writing to '%s'\n", filename
);
81 ret
= open(filename
, flags
, 0644);
87 static void header_done_cb(struct uclient
*cl
)
91 if (retries
< 10 && uclient_http_redirect(cl
)) {
93 fprintf(stderr
, "Redirected to %s on %s\n", cl
->url
->location
, cl
->url
->host
);
100 switch (cl
->status_code
) {
105 output_fd
= open_output_file(cl
->url
->location
, true);
108 perror("Cannot open output file");
116 fprintf(stderr
, "HTTP error %d\n", cl
->status_code
);
123 static void read_data_cb(struct uclient
*cl
)
128 if (!no_output
&& output_fd
< 0)
132 len
= uclient_read(cl
, buf
, sizeof(buf
));
138 write(output_fd
, buf
, len
);
142 static void msg_connecting(struct uclient
*cl
)
144 char addr
[INET6_ADDRSTRLEN
];
150 uclient_get_addr(addr
, &port
, &cl
->remote_addr
);
151 fprintf(stderr
, "Connecting to %s:%d\n", addr
, port
);
154 static int init_request(struct uclient
*cl
)
159 uclient_http_set_ssl_ctx(cl
, ssl_ops
, ssl_ctx
, verify
);
161 rc
= uclient_connect(cl
);
167 rc
= uclient_http_set_request_type(cl
, post_data
? "POST" : "GET");
171 uclient_http_reset_headers(cl
);
172 uclient_http_set_header(cl
, "User-Agent", user_agent
);
175 uclient_http_set_header(cl
, "Content-Type", "application/x-www-form-urlencoded");
176 uclient_write(cl
, post_data
, strlen(post_data
));
179 rc
= uclient_request(cl
);
186 static void request_done(struct uclient
*cl
)
189 uclient_set_url(cl
, *urls
, auth_str
);
191 error_ret
= init_request(cl
);
196 if (output_fd
>= 0 && !output_file
) {
200 uclient_disconnect(cl
);
205 static void eof_cb(struct uclient
*cl
)
209 fprintf(stderr
, "Connection reset prematurely\n");
212 fprintf(stderr
, "Download completed (%d bytes)\n", out_bytes
);
217 static void handle_uclient_error(struct uclient
*cl
, int code
)
219 const char *type
= "Unknown error";
223 case UCLIENT_ERROR_CONNECT
:
224 type
= "Connection failed";
227 case UCLIENT_ERROR_TIMEDOUT
:
228 type
= "Connection timed out";
231 case UCLIENT_ERROR_SSL_INVALID_CERT
:
232 type
= "Invalid SSL certificate";
236 case UCLIENT_ERROR_SSL_CN_MISMATCH
:
237 type
= "Server hostname does not match SSL certificate";
247 fprintf(stderr
, "Connection error: %s%s\n", type
, ignore
? " (ignored)" : "");
255 static const struct uclient_cb cb
= {
256 .header_done
= header_done_cb
,
257 .data_read
= read_data_cb
,
259 .error
= handle_uclient_error
,
262 static int usage(const char *progname
)
265 "Usage: %s [options] <URL>\n"
267 " -q: Turn off status messages\n"
268 " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
269 " --user=<user> HTTP authentication username\n"
270 " --password=<password> HTTP authentication password\n"
271 " --user-agent|-U <str> Set HTTP user agent\n"
272 " --post-data=STRING use the POST method; send STRING as the data\n"
273 " --spider|-s Spider mode - only check file existence\n"
276 " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
277 " --no-check-certificate: don't validate the server's certificate\n"
282 static void init_ca_cert(void)
287 glob("/etc/ssl/certs/*.crt", 0, NULL
, &gl
);
288 for (i
= 0; i
< gl
.gl_pathc
; i
++)
289 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, gl
.gl_pathv
[i
]);
292 static void init_ustream_ssl(void)
296 dlh
= dlopen("libustream-ssl." LIB_EXT
, RTLD_LAZY
| RTLD_LOCAL
);
300 ssl_ops
= dlsym(dlh
, "ustream_ssl_ops");
304 ssl_ctx
= ssl_ops
->context_new(false);
307 static int no_ssl(const char *progname
)
309 fprintf(stderr
, "%s: SSL support not available, please install ustream-ssl\n", progname
);
314 L_NO_CHECK_CERTIFICATE
,
323 static const struct option longopts
[] = {
324 [L_NO_CHECK_CERTIFICATE
] = { "no-check-certificate", no_argument
},
325 [L_CA_CERTIFICATE
] = { "ca-certificate", required_argument
},
326 [L_USER
] = { "user", required_argument
},
327 [L_PASSWORD
] = { "password", required_argument
},
328 [L_USER_AGENT
] = { "user-agent", required_argument
},
329 [L_POST_DATA
] = { "post-data", required_argument
},
330 [L_SPIDER
] = { "spider", no_argument
},
336 int main(int argc
, char **argv
)
338 const char *progname
= argv
[0];
341 bool has_cert
= false;
347 while ((ch
= getopt_long(argc
, argv
, "O:qsU:", longopts
, &longopt_idx
)) != -1) {
350 switch (longopt_idx
) {
351 case L_NO_CHECK_CERTIFICATE
:
354 case L_CA_CERTIFICATE
:
357 ssl_ops
->context_add_ca_crt_file(ssl_ctx
, optarg
);
362 username
= strdup(optarg
);
363 memset(optarg
, '*', strlen(optarg
));
368 password
= strdup(optarg
);
369 memset(optarg
, '*', strlen(optarg
));
381 return usage(progname
);
388 output_file
= optarg
;
397 return usage(progname
);
404 if (verify
&& !has_cert
)
405 default_certs
= true;
408 return usage(progname
);
411 for (i
= 0; i
< argc
; i
++) {
412 if (!strncmp(argv
[i
], "https", 5))
413 return no_ssl(progname
);
424 asprintf(&auth_str
, "%s:%s", username
, password
);
430 fprintf(stderr
, "Downloading '%s'\n", argv
[0]);
432 cl
= uclient_new(argv
[0], auth_str
, &cb
);
434 fprintf(stderr
, "Failed to allocate uclient context\n");
438 if (ssl_ctx
&& default_certs
)
441 rc
= init_request(cl
);
443 /* no error received, we can enter main loop */
446 fprintf(stderr
, "Failed to establish connection\n");
454 if (output_fd
>= 0 && output_fd
!= STDOUT_FILENO
)
458 ssl_ops
->context_free(ssl_ctx
);