-/*
- * uclient - ustream based protocol client library
- *
- * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <unistd.h>
-#include <stdio.h>
-#include <dlfcn.h>
-#include <getopt.h>
-#include <fcntl.h>
-
-#include <libubox/blobmsg.h>
-
-#include "uclient.h"
-
-#ifdef __APPLE__
-#define LIB_EXT "dylib"
-#else
-#define LIB_EXT "so"
-#endif
-
-static struct ustream_ssl_ctx *ssl_ctx;
-static const struct ustream_ssl_ops *ssl_ops;
-static int quiet = false;
-static bool verify = true;
-static const char *output_file;
-static int output_fd = -1;
-static int error_ret;
-
-static int open_output_file(const char *path, bool create)
-{
- const char *str;
- char *filename;
- int len;
- int flags = O_WRONLY;
-
- if (create)
- flags |= O_CREAT;
-
- if (output_file) {
- if (!strcmp(output_file, "-"))
- return STDOUT_FILENO;
-
- return open(output_file, flags, 0644);
- }
-
- /* Don't automatically overwrite files if the name is derived from the URL */
- if (create)
- flags |= O_EXCL;
-
- len = strcspn(path, ";&");
- while (len > 0 && path[len - 1] == '/')
- len--;
-
- for (str = path + len - 1; str >= path; str--) {
- if (*str == '/')
- break;
- }
-
- str++;
- len -= str - path;
-
- if (len > 0) {
- filename = alloca(len + 1);
- strncpy(filename, str, len);
- filename[len] = 0;
- } else {
- filename = "index.html";
- }
-
- return open(filename, flags, 0644);
-}
-
-static void request_done(struct uclient *cl)
-{
- if (output_fd >= 0 && !output_file) {
- close(output_fd);
- output_fd = -1;
- }
- uclient_disconnect(cl);
- uloop_end();
-}
-
-static void header_done_cb(struct uclient *cl)
-{
- static int retries;
-
- struct blob_attr *cur;
- int rem;
-
- if (retries < 10 && uclient_http_redirect(cl)) {
- if (!quiet)
- fprintf(stderr, "Redirected to %s on %s\n", cl->url->location, cl->url->host);
-
- retries++;
- return;
- }
-
- retries = 0;
- if (!quiet) {
- fprintf(stderr, "Headers (%d): \n", cl->status_code);
- blobmsg_for_each_attr(cur, cl->meta, rem) {
- fprintf(stderr, "%s=%s\n", blobmsg_name(cur), (char *) blobmsg_data(cur));
- }
- }
-
- switch (cl->status_code) {
- case 204:
- case 200:
- output_fd = open_output_file(cl->url->location, true);
- if (output_fd < 0) {
- if (!quiet)
- perror("Cannot open output file");
- error_ret = 3;
- request_done(cl);
- }
- break;
-
- default:
- request_done(cl);
- error_ret = 8;
- break;
- }
-}
-
-static void read_data_cb(struct uclient *cl)
-{
- char buf[256];
- int len;
-
- if (output_fd < 0)
- return;
-
- while (1) {
- len = uclient_read(cl, buf, sizeof(buf));
- if (!len)
- return;
-
- write(output_fd, buf, len);
- }
-}
-
-static void msg_connecting(struct uclient *cl)
-{
- char addr[INET6_ADDRSTRLEN];
- int port;
-
- if (quiet)
- return;
-
- uclient_get_addr(addr, &port, &cl->remote_addr);
- fprintf(stderr, "Connecting to %s %s:%d\n", cl->url->host, addr, port);
-}
-
-static void init_request(struct uclient *cl)
-{
- uclient_connect(cl);
- msg_connecting(cl);
- uclient_http_set_request_type(cl, "GET");
- uclient_request(cl);
-}
-
-static void eof_cb(struct uclient *cl)
-{
- request_done(cl);
-}
-
-static void handle_uclient_error(struct uclient *cl, int code)
-{
- const char *type = "Unknown error";
- bool ignore = false;
-
- switch(code) {
- case UCLIENT_ERROR_CONNECT:
- type = "Connection failed";
- error_ret = 4;
- break;
- case UCLIENT_ERROR_SSL_INVALID_CERT:
- type = "Invalid SSL certificate";
- ignore = !verify;
- error_ret = 5;
- break;
- case UCLIENT_ERROR_SSL_CN_MISMATCH:
- type = "Server hostname does not match SSL certificate";
- ignore = !verify;
- error_ret = 5;
- break;
- default:
- error_ret = 1;
- break;
- }
-
- if (!quiet)
- fprintf(stderr, "Connection error: %s%s\n", type, ignore ? " (ignored)" : "");
-
- if (ignore)
- error_ret = 0;
- else
- request_done(cl);
-}
-
-static const struct uclient_cb cb = {
- .header_done = header_done_cb,
- .data_read = read_data_cb,
- .data_eof = eof_cb,
- .error = handle_uclient_error,
-};
-
-static int usage(const char *progname)
-{
- fprintf(stderr,
- "Usage: %s [options] <URL>\n"
- "Options:\n"
- " -q: Turn off status messages\n"
- " -O <file>: Redirect output to file (use \"-\" for stdout)\n"
- "\n"
- "HTTPS options:\n"
- " --ca-certificate=<cert>: Load CA certificates from file <cert>\n"
- " --no-check-certificate: don't validate the server's certificate\n"
- "\n", progname);
- return 1;
-}
-
-
-static void init_ustream_ssl(void)
-{
- void *dlh;
-
- dlh = dlopen("libustream-ssl." LIB_EXT, RTLD_LAZY | RTLD_LOCAL);
- if (!dlh)
- return;
-
- ssl_ops = dlsym(dlh, "ustream_ssl_ops");
- if (!ssl_ops)
- return;
-
- ssl_ctx = ssl_ops->context_new(false);
-}
-
-static int no_ssl(const char *progname)
-{
- fprintf(stderr, "%s: SSL support not available, please install ustream-ssl\n", progname);
- return 1;
-}
-
-enum {
- L_NO_CHECK_CERTIFICATE,
- L_CA_CERTIFICATE,
-};
-
-static const struct option longopts[] = {
- [L_NO_CHECK_CERTIFICATE] = { "no-check-certificate", no_argument },
- [L_CA_CERTIFICATE] = { "ca-certificate", required_argument },
- {}
-};
-
-int main(int argc, char **argv)
-{
- const char *progname = argv[0];
- struct uclient *cl;
- int ch;
- int longopt_idx = 0;
-
- init_ustream_ssl();
-
- while ((ch = getopt_long(argc, argv, "qO:", longopts, &longopt_idx)) != -1) {
- switch(ch) {
- case 0:
- switch (longopt_idx) {
- case L_NO_CHECK_CERTIFICATE:
- verify = false;
- break;
- case L_CA_CERTIFICATE:
- if (ssl_ctx)
- ssl_ops->context_add_ca_crt_file(ssl_ctx, optarg);
- break;
- default:
- return usage(progname);
- }
- break;
- case 'O':
- output_file = optarg;
- break;
- case 'q':
- quiet = true;
- break;
- default:
- return usage(progname);
- }
- }
-
- argv += optind;
- argc -= optind;
-
- if (argc != 1)
- return usage(progname);
-
- if (!strncmp(argv[0], "https", 5) && !ssl_ctx)
- return no_ssl(progname);
-
- uloop_init();
-
- cl = uclient_new(argv[0], NULL, &cb);
- if (!cl) {
- fprintf(stderr, "Failed to allocate uclient context\n");
- return 1;
- }
-
- if (ssl_ctx)
- uclient_http_set_ssl_ctx(cl, ssl_ops, ssl_ctx, verify);
-
- init_request(cl);
- uloop_run();
- uloop_done();
-
- uclient_free(cl);
-
- if (output_fd >= 0 && output_fd != STDOUT_FILENO)
- close(output_fd);
-
- if (ssl_ctx)
- ssl_ops->context_free(ssl_ctx);
-
- return error_ret;
-}
projects / project / uclient.git / commitdiff