66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
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// Copyright (c) 2020 Cesanta Software Limited
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// All rights reserved
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//
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// Example HTTP client that uses a proxy server. Usage:
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// make
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// ./example PROXY:PORT http://www.ladyada.net
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//
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// To enable SSL/TLS, see https://mongoose.ws/tutorials/tls/#how-to-build
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//
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#include "mongoose.h"
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// Print HTTP response and signal that we're done
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static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
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const char *url = fn_data;
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static bool connected;
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if (ev == MG_EV_HTTP_MSG) {
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struct mg_http_message *hm = (struct mg_http_message *) ev_data;
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printf("%.*s", (int) hm->message.len, hm->message.ptr);
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exit(EXIT_SUCCESS);
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} else if (ev == MG_EV_CONNECT) {
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// Proxy TCP connection established. Send CONNECT request
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struct mg_str host = mg_url_host(url);
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// c->is_hexdumping = 1;
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mg_printf(c, "CONNECT %.*s:%hu HTTP/1.1\r\nHost: %.*s:%hu\r\n\r\n",
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(int) host.len, host.ptr, mg_url_port(url), (int) host.len,
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host.ptr, mg_url_port(url));
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// If target URL is SSL/TLS, command client connection to use TLS
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if (mg_url_is_ssl(url)) {
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struct mg_tls_opts opts = {.ca = "ca.pem"};
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mg_tls_init(c, &opts);
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}
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} else if (!connected && ev == MG_EV_READ) {
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struct mg_http_message hm;
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int n = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
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if (n > 0) {
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struct mg_str host = mg_url_host(url);
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// CONNECT response - tunnel is established
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connected = true;
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MG_DEBUG(
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("Connected to proxy, status: %.*s", (int) hm.uri.len, hm.uri.ptr));
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mg_iobuf_del(&c->recv, 0, n);
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// Send request to the target server
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mg_printf(c, "GET %s HTTP/1.0\r\n"
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"Host: %.*s\r\n"
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"\r\n",
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mg_url_uri(url), (int) host.len, host.ptr);
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}
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}
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}
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int main(int argc, char *argv[]) {
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struct mg_mgr mgr;
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if (argc != 3) {
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fprintf(stderr, "Usage: %s PROXY_URL URL\n", argv[0]);
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return EXIT_FAILURE;
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}
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mg_mgr_init(&mgr); // Initialise event manager
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mg_http_connect(&mgr, argv[1], fn, argv[2]); // Connect to the proxy
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for (;;) mg_mgr_poll(&mgr, 1000); // Event loop
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mg_mgr_free(&mgr);
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return 0;
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}
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