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1 #include <inttypes.h>
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5 #include <uv.h>
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6
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7 uv_loop_t *loop;
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8 uv_process_t child_req;
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9 uv_process_options_t options;
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10
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11 void cleanup_handles(uv_process_t *req, int64_t exit_status, int term_signal) {
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12 fprintf(stderr, "Process exited with status %" PRId64 ", signal %d\n", exit_status, term_signal);
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13 uv_close((uv_handle_t*) req->data, NULL);
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14 uv_close((uv_handle_t*) req, NULL);
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15 }
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16
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17 void invoke_cgi_script(uv_tcp_t *client) {
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18 char path[500];
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19 size_t size = sizeof(path);
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20 uv_exepath(path, &size);
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21 strcpy(path + (strlen(path) - strlen("cgi")), "tick");
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22
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23 char* args[2];
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24 args[0] = path;
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25 args[1] = NULL;
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26
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27 /* ... finding the executable path and setting up arguments ... */
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28
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29 options.stdio_count = 3;
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30 uv_stdio_container_t child_stdio[3];
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31 child_stdio[0].flags = UV_IGNORE;
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32 child_stdio[1].flags = UV_INHERIT_STREAM;
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33 child_stdio[1].data.stream = (uv_stream_t*) client;
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34 child_stdio[2].flags = UV_IGNORE;
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35 options.stdio = child_stdio;
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36
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37 options.exit_cb = cleanup_handles;
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38 options.file = args[0];
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39 options.args = args;
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40
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41 // Set this so we can close the socket after the child process exits.
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42 child_req.data = (void*) client;
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43 int r;
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44 if ((r = uv_spawn(loop, &child_req, &options))) {
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45 fprintf(stderr, "%s\n", uv_strerror(r));
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46 return;
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47 }
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48 }
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49
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50 void on_new_connection(uv_stream_t *server, int status) {
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51 if (status == -1) {
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52 // error!
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53 return;
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54 }
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55
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56 uv_tcp_t *client = (uv_tcp_t*) malloc(sizeof(uv_tcp_t));
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57 uv_tcp_init(loop, client);
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58 if (uv_accept(server, (uv_stream_t*) client) == 0) {
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59 invoke_cgi_script(client);
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60 }
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61 else {
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62 uv_close((uv_handle_t*) client, NULL);
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63 }
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64 }
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65
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66 int main() {
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67 loop = uv_default_loop();
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68
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69 uv_tcp_t server;
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70 uv_tcp_init(loop, &server);
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71
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72 struct sockaddr_in bind_addr;
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73 uv_ip4_addr("0.0.0.0", 7000, &bind_addr);
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74 uv_tcp_bind(&server, (const struct sockaddr *)&bind_addr, 0);
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75 int r = uv_listen((uv_stream_t*) &server, 128, on_new_connection);
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76 if (r) {
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77 fprintf(stderr, "Listen error %s\n", uv_err_name(r));
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78 return 1;
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79 }
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80 return uv_run(loop, UV_RUN_DEFAULT);
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81 }
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