*/
#define _GNU_SOURCE
+#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <dlfcn.h>
#include <getopt.h>
#include <fcntl.h>
#include <glob.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <signal.h>
#include <libubox/blobmsg.h>
#define LIB_EXT "so"
#endif
+static const char *user_agent = "uclient-fetch";
+static const char *post_data;
static struct ustream_ssl_ctx *ssl_ctx;
static const struct ustream_ssl_ops *ssl_ops;
static int quiet = false;
static bool verify = true;
+static bool proxy = true;
static bool default_certs = false;
+static bool no_output;
static const char *output_file;
static int output_fd = -1;
static int error_ret;
static int out_bytes;
-static char *username;
-static char *password;
static char *auth_str;
static char **urls;
static int n_urls;
+static int timeout;
+static bool resume, cur_resume;
+static int init_request(struct uclient *cl);
static void request_done(struct uclient *cl);
-static int open_output_file(const char *path, bool create)
+static const char *
+get_proxy_url(char *url)
{
- char *filename;
- int flags = O_WRONLY;
+ char prefix[16];
+ char *sep;
+
+ if (!proxy)
+ return NULL;
+
+ sep = strchr(url, ':');
+ if (!sep)
+ return NULL;
+
+ if (sep - url > 5)
+ return NULL;
+
+ memcpy(prefix, url, sep - url);
+ strcpy(prefix + (sep - url), "_proxy");
+ return getenv(prefix);
+}
+
+static int open_output_file(const char *path, uint64_t resume_offset)
+{
+ char *filename = NULL;
+ int flags;
int ret;
- if (create)
- flags |= O_CREAT | O_EXCL;
+ if (cur_resume)
+ flags = O_RDWR;
+ else
+ flags = O_WRONLY | O_EXCL;
- if (output_file) {
- if (!strcmp(output_file, "-"))
- return STDOUT_FILENO;
+ flags |= O_CREAT;
- if (!quiet)
- fprintf(stderr, "Writing to stdout\n");
+ if (output_file) {
+ if (!strcmp(output_file, "-")) {
+ if (!quiet)
+ fprintf(stderr, "Writing to stdout\n");
- unlink(output_file);
- return open(output_file, flags, 0644);
+ return STDOUT_FILENO;
+ }
+ } else {
+ filename = uclient_get_url_filename(path, "index.html");
+ output_file = filename;
}
- filename = uclient_get_url_filename(path, "index.html");
if (!quiet)
- fprintf(stderr, "Writing to '%s'\n", filename);
- ret = open(filename, flags, 0644);
+ fprintf(stderr, "Writing to '%s'\n", output_file);
+ ret = open(output_file, flags, 0644);
free(filename);
+ if (ret < 0)
+ return ret;
+
+ if (resume_offset &&
+ lseek(ret, resume_offset, SEEK_SET) < 0) {
+ if (!quiet)
+ fprintf(stderr, "Failed to seek %"PRIu64" bytes in output file\n", resume_offset);
+ close(ret);
+ return -1;
+ }
+
+ out_bytes += resume_offset;
+
return ret;
}
static void header_done_cb(struct uclient *cl)
{
+ static const struct blobmsg_policy policy = {
+ .name = "content-range",
+ .type = BLOBMSG_TYPE_STRING
+ };
+ struct blob_attr *attr;
+ uint64_t resume_offset = 0, resume_end, resume_size;
static int retries;
if (retries < 10 && uclient_http_redirect(cl)) {
return;
}
- retries = 0;
+ if (cl->status_code == 204 && cur_resume) {
+ /* Resume attempt failed, try normal download */
+ cur_resume = false;
+ init_request(cl);
+ return;
+ }
+
switch (cl->status_code) {
+ case 416:
+ if (!quiet)
+ fprintf(stderr, "File download already fully retrieved; nothing to do.\n");
+ request_done(cl);
+ break;
+ case 206:
+ if (!cur_resume) {
+ if (!quiet)
+ fprintf(stderr, "Error: Partial content received, full content requested\n");
+ error_ret = 8;
+ request_done(cl);
+ break;
+ }
+
+ blobmsg_parse(&policy, 1, &attr, blob_data(cl->meta), blob_len(cl->meta));
+ if (!attr) {
+ if (!quiet)
+ fprintf(stderr, "Content-Range header is missing\n");
+ error_ret = 8;
+ break;
+ }
+
+ if (sscanf(blobmsg_get_string(attr), "bytes %"PRIu64"-%"PRIu64"/%"PRIu64,
+ &resume_offset, &resume_end, &resume_size) != 3) {
+ if (!quiet)
+ fprintf(stderr, "Content-Range header is invalid\n");
+ error_ret = 8;
+ break;
+ }
case 204:
case 200:
- output_fd = open_output_file(cl->url->location, true);
+ if (no_output)
+ break;
+ output_fd = open_output_file(cl->url->location, resume_offset);
if (output_fd < 0) {
if (!quiet)
perror("Cannot open output file");
char buf[256];
int len;
- if (output_fd < 0)
+ if (!no_output && output_fd < 0)
return;
while (1) {
return;
out_bytes += len;
- write(output_fd, buf, len);
+ if (!no_output)
+ write(output_fd, buf, len);
}
}
fprintf(stderr, "Connecting to %s:%d\n", addr, port);
}
+static void check_resume_offset(struct uclient *cl)
+{
+ char range_str[64];
+ struct stat st;
+ char *file;
+ int ret;
+
+ file = uclient_get_url_filename(cl->url->location, "index.html");
+ if (!file)
+ return;
+
+ ret = stat(file, &st);
+ free(file);
+ if (ret)
+ return;
+
+ if (!st.st_size)
+ return;
+
+ snprintf(range_str, sizeof(range_str), "bytes=%"PRIu64"-", (uint64_t) st.st_size);
+ uclient_http_set_header(cl, "Range", range_str);
+}
+
static int init_request(struct uclient *cl)
{
int rc;
out_bytes = 0;
uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
+ if (timeout)
+ cl->timeout_msecs = timeout * 1000;
+
rc = uclient_connect(cl);
if (rc)
return rc;
msg_connecting(cl);
- rc = uclient_http_set_request_type(cl, "GET");
+ rc = uclient_http_set_request_type(cl, post_data ? "POST" : "GET");
if (rc)
return rc;
+ uclient_http_reset_headers(cl);
+ uclient_http_set_header(cl, "User-Agent", user_agent);
+ if (cur_resume)
+ check_resume_offset(cl);
+
+ if (post_data) {
+ uclient_http_set_header(cl, "Content-Type", "application/x-www-form-urlencoded");
+ uclient_write(cl, post_data, strlen(post_data));
+ }
+
rc = uclient_request(cl);
if (rc)
return rc;
static void request_done(struct uclient *cl)
{
+ const char *proxy_url;
+
if (n_urls) {
- uclient_set_url(cl, *urls, auth_str);
+ proxy_url = get_proxy_url(*urls);
+ if (proxy_url) {
+ uclient_set_url(cl, proxy_url, NULL);
+ uclient_set_proxy_url(cl, *urls, auth_str);
+ } else {
+ uclient_set_url(cl, *urls, auth_str);
+ }
n_urls--;
+ cur_resume = resume;
error_ret = init_request(cl);
if (error_ret == 0)
return;
"Options:\n"
" -q: Turn off status messages\n"
" -O <file>: Redirect output to file (use \"-\" for stdout)\n"
+ " -P <dir>: Set directory for output files\n"
" --user=<user> HTTP authentication username\n"
" --password=<password> HTTP authentication password\n"
+ " --user-agent|-U <str> Set HTTP user agent\n"
+ " --post-data=STRING use the POST method; send STRING as the data\n"
+ " --spider|-s Spider mode - only check file existence\n"
+ " --timeout=N|-T N Set connect/request timeout to N seconds\n"
+ " --proxy=on|off|-Y on|off Enable/disable env var configured proxy\n"
"\n"
"HTTPS options:\n"
" --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
L_CA_CERTIFICATE,
L_USER,
L_PASSWORD,
+ L_USER_AGENT,
+ L_POST_DATA,
+ L_SPIDER,
+ L_TIMEOUT,
+ L_CONTINUE,
+ L_PROXY,
+ L_NO_PROXY,
};
static const struct option longopts[] = {
[L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
[L_USER] = { "user", required_argument },
[L_PASSWORD] = { "password", required_argument },
+ [L_USER_AGENT] = { "user-agent", required_argument },
+ [L_POST_DATA] = { "post-data", required_argument },
+ [L_SPIDER] = { "spider", no_argument },
+ [L_TIMEOUT] = { "timeout", required_argument },
+ [L_CONTINUE] = { "continue", no_argument },
+ [L_PROXY] = { "proxy", required_argument },
+ [L_NO_PROXY] = { "no-proxy", no_argument },
{}
};
int main(int argc, char **argv)
{
const char *progname = argv[0];
+ const char *proxy_url;
+ char *username = NULL;
+ char *password = NULL;
struct uclient *cl;
int longopt_idx = 0;
bool has_cert = false;
int i, ch;
int rc;
+ signal(SIGPIPE, SIG_IGN);
init_ustream_ssl();
- while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
+ while ((ch = getopt_long(argc, argv, "cO:P:qsU:Y:", longopts, &longopt_idx)) != -1) {
switch(ch) {
case 0:
switch (longopt_idx) {
password = strdup(optarg);
memset(optarg, '*', strlen(optarg));
break;
+ case L_USER_AGENT:
+ user_agent = optarg;
+ break;
+ case L_POST_DATA:
+ post_data = optarg;
+ break;
+ case L_SPIDER:
+ no_output = true;
+ break;
+ case L_TIMEOUT:
+ timeout = atoi(optarg);
+ break;
+ case L_CONTINUE:
+ resume = true;
+ break;
+ case L_PROXY:
+ if (strcmp(optarg, "on") != 0)
+ proxy = false;
+ break;
+ case L_NO_PROXY:
+ proxy = false;
+ break;
default:
return usage(progname);
}
break;
+ case 'c':
+ resume = true;
+ break;
+ case 'U':
+ user_agent = optarg;
+ break;
case 'O':
output_file = optarg;
break;
+ case 'P':
+ if (chdir(optarg)) {
+ if (!quiet)
+ perror("Change output directory");
+ exit(1);
+ }
+ break;
case 'q':
quiet = true;
break;
+ case 's':
+ no_output = true;
+ break;
+ case 'T':
+ timeout = atoi(optarg);
+ break;
+ case 'Y':
+ if (strcmp(optarg, "on") != 0)
+ proxy = false;
+ break;
default:
return usage(progname);
}
if (!quiet)
fprintf(stderr, "Downloading '%s'\n", argv[0]);
- cl = uclient_new(argv[0], auth_str, &cb);
+ proxy_url = get_proxy_url(argv[0]);
+ if (proxy_url) {
+ cl = uclient_new(proxy_url, auth_str, &cb);
+ uclient_set_proxy_url(cl, argv[0], NULL);
+ } else {
+ cl = uclient_new(argv[0], auth_str, &cb);
+ }
if (!cl) {
fprintf(stderr, "Failed to allocate uclient context\n");
return 1;
}
- if (ssl_ctx)
+ if (ssl_ctx && default_certs)
init_ca_cert();
+ cur_resume = resume;
rc = init_request(cl);
if (!rc) {
/* no error received, we can enter main loop */
projects / project / uclient.git / blobdiff