118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
#include "event2/event-config.h"
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#include <event2/event.h>
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#include <event2/http.h>
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#include <event2/http_struct.h>
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#include <event2/buffer.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <limits.h>
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#define VERIFY(cond) do { \
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if (!(cond)) { \
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fprintf(stderr, "[error] %s\n", #cond); \
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} \
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} while (0); \
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#define URL_MAX 4096
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struct connect_base
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{
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struct evhttp_connection *evcon;
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struct evhttp_uri *location;
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};
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static void get_cb(struct evhttp_request *req, void *arg)
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{
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ev_ssize_t len;
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struct evbuffer *evbuf;
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VERIFY(req);
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evbuf = evhttp_request_get_input_buffer(req);
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len = evbuffer_get_length(evbuf);
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fwrite(evbuffer_pullup(evbuf, len), len, 1, stdout);
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evbuffer_drain(evbuf, len);
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}
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static void connect_cb(struct evhttp_request *proxy_req, void *arg)
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{
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char buffer[URL_MAX];
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struct connect_base *base = arg;
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struct evhttp_connection *evcon = base->evcon;
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struct evhttp_uri *location = base->location;
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VERIFY(proxy_req);
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if (evcon) {
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struct evhttp_request *req = evhttp_request_new(get_cb, NULL);
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evhttp_add_header(req->output_headers, "Connection", "close");
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VERIFY(!evhttp_make_request(evcon, req, EVHTTP_REQ_GET,
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evhttp_uri_join(location, buffer, URL_MAX)));
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}
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}
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int main(int argc, const char **argv)
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{
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char buffer[URL_MAX];
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struct evhttp_uri *host_port;
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struct evhttp_uri *location;
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struct evhttp_uri *proxy;
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struct event_base *base;
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struct evhttp_connection *evcon;
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struct evhttp_request *req;
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struct connect_base connect_base;
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if (argc != 3) {
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printf("Usage: %s proxy url\n", argv[0]);
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return 1;
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}
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{
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proxy = evhttp_uri_parse(argv[1]);
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VERIFY(evhttp_uri_get_host(proxy));
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VERIFY(evhttp_uri_get_port(proxy) > 0);
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}
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{
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host_port = evhttp_uri_parse(argv[2]);
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evhttp_uri_set_scheme(host_port, NULL);
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evhttp_uri_set_userinfo(host_port, NULL);
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evhttp_uri_set_path(host_port, NULL);
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evhttp_uri_set_query(host_port, NULL);
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evhttp_uri_set_fragment(host_port, NULL);
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VERIFY(evhttp_uri_get_host(host_port));
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VERIFY(evhttp_uri_get_port(host_port) > 0);
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}
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{
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location = evhttp_uri_parse(argv[2]);
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evhttp_uri_set_scheme(location, NULL);
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evhttp_uri_set_userinfo(location, 0);
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evhttp_uri_set_host(location, NULL);
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evhttp_uri_set_port(location, -1);
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}
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VERIFY(base = event_base_new());
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VERIFY(evcon = evhttp_connection_base_new(base, NULL,
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evhttp_uri_get_host(proxy), evhttp_uri_get_port(proxy)));
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connect_base.evcon = evcon;
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connect_base.location = location;
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VERIFY(req = evhttp_request_new(connect_cb, &connect_base));
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evhttp_add_header(req->output_headers, "Connection", "keep-alive");
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evhttp_add_header(req->output_headers, "Proxy-Connection", "keep-alive");
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evutil_snprintf(buffer, URL_MAX, "%s:%d",
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evhttp_uri_get_host(host_port), evhttp_uri_get_port(host_port));
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evhttp_make_request(evcon, req, EVHTTP_REQ_CONNECT, buffer);
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event_base_dispatch(base);
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evhttp_connection_free(evcon);
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event_base_free(base);
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evhttp_uri_free(proxy);
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evhttp_uri_free(host_port);
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evhttp_uri_free(location);
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return 0;
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}
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