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annotate src/c/http.c @ 1205:7cd11380cdf1

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WHERE-dependent checking
author Adam Chlipala <adamc@hcoop.net>
date Sun, 04 Apr 2010 17:18:41 -0400
parents 15767031950c
children 236dc296c32d
rev   line source
adamc@116 1 #include <stdio.h>
adamc@116 2 #include <string.h>
adamc@502 3 #include <stdlib.h>
adamc@116 4 #include <sys/types.h>
adamc@116 5 #include <sys/socket.h>
adamc@116 6 #include <netinet/in.h>
adamc@472 7 #include <unistd.h>
adamc@502 8 #include <signal.h>
adamc@856 9 #include <stdarg.h>
adamc@116 10
adamc@138 11 #include <pthread.h>
adamc@138 12
adamc@244 13 #include "urweb.h"
adamc@853 14 #include "request.h"
adamc@859 15 #include "queue.h"
adamc@117 16
adamc@1094 17 extern uw_app uw_application;
adamc@1094 18
adamc@311 19 int uw_backlog = 10;
adamc@116 20
adamc@854 21 static char *get_header(void *data, const char *h) {
adamc@854 22 char *s = data;
adamc@854 23 int len = strlen(h);
adamc@854 24 char *p;
adamc@854 25
adamc@1134 26 while ((p = strchr(s, ':'))) {
adamc@854 27 if (p - s == len && !strncasecmp(s, h, len)) {
adamc@854 28 return p + 2;
adamc@854 29 } else {
adamc@854 30 if ((s = strchr(p, 0)) && s[1] != 0)
adamc@854 31 s += 2;
adamc@854 32 else
adamc@854 33 return NULL;
adamc@854 34 }
adamc@854 35 }
adamc@854 36
adamc@854 37 return NULL;
adamc@854 38 }
adamc@854 39
adamc@856 40 static void on_success(uw_context ctx) {
adamc@856 41 uw_write_header(ctx, "HTTP/1.1 200 OK\r\n");
adamc@856 42 }
adamc@856 43
adamc@856 44 static void on_failure(uw_context ctx) {
adamc@856 45 uw_write_header(ctx, "HTTP/1.1 500 Internal Server Error\r\n");
adamc@856 46 }
adamc@856 47
adamc@856 48 static void log_error(void *data, const char *fmt, ...) {
adamc@856 49 va_list ap;
adamc@856 50 va_start(ap, fmt);
adamc@856 51
adamc@856 52 vfprintf(stderr, fmt, ap);
adamc@856 53 }
adamc@856 54
adamc@856 55 static void log_debug(void *data, const char *fmt, ...) {
adamc@856 56 va_list ap;
adamc@856 57 va_start(ap, fmt);
adamc@856 58
adamc@856 59 vprintf(fmt, ap);
adamc@856 60 }
adamc@856 61
adamc@853 62 static void *worker(void *data) {
adamc@853 63 int me = *(int *)data;
adamc@1094 64 uw_context ctx = uw_request_new_context(&uw_application, NULL, log_error, log_debug);
adamc@853 65 size_t buf_size = 2;
adamc@853 66 char *buf = malloc(buf_size);
adamc@853 67 uw_request_context rc = uw_new_request_context();
adamc@698 68
adamc@272 69 while (1) {
adamc@853 70 char *back = buf;
adamc@859 71 int sock = uw_dequeue();
adamc@138 72
adamc@138 73 printf("Handling connection with thread #%d.\n", me);
adamc@138 74
adamc@138 75 while (1) {
adamc@737 76 int r;
adamc@854 77 char *method, *path, *query_string, *headers, *body, *s, *s2;
adamc@737 78
adamc@742 79 if (back - buf == buf_size - 1) {
adamc@737 80 char *new_buf;
adamc@737 81 buf_size *= 2;
adamc@737 82 new_buf = realloc(buf, buf_size);
adamc@737 83 back = new_buf + (back - buf);
adamc@737 84 buf = new_buf;
adamc@737 85 }
adamc@737 86
adamc@742 87 r = recv(sock, back, buf_size - 1 - (back - buf), 0);
adamc@138 88
adamc@138 89 if (r < 0) {
adamc@138 90 fprintf(stderr, "Recv failed\n");
adamc@138 91 break;
adamc@138 92 }
adamc@138 93
adamc@138 94 if (r == 0) {
adamc@138 95 printf("Connection closed.\n");
adamc@138 96 break;
adamc@138 97 }
adamc@138 98
adamc@138 99 back += r;
adamc@138 100 *back = 0;
adamc@730 101
adamc@854 102 if ((body = strstr(buf, "\r\n\r\n"))) {
adamc@853 103 request_result rr;
adamc@138 104
adamc@854 105 body[0] = body[1] = 0;
adamc@854 106 body += 4;
adamc@854 107
adamc@854 108 if ((s = strcasestr(buf, "\r\nContent-Length: ")) && s < body) {
adamc@853 109 int clen;
adamc@737 110
adamc@854 111 if (sscanf(s + 18, "%d\r\n", &clen) != 1) {
adamc@853 112 fprintf(stderr, "Malformed Content-Length header\n");
adamc@167 113 break;
adamc@167 114 }
adamc@167 115
adamc@854 116 while (back - body < clen) {
adamc@854 117 if (back - buf == buf_size - 1) {
adamc@854 118 char *new_buf;
adamc@854 119 buf_size *= 2;
adamc@854 120 new_buf = realloc(buf, buf_size);
adamc@854 121
adamc@854 122 back = new_buf + (back - buf);
adamc@854 123 body = new_buf + (body - buf);
adamc@854 124 s = new_buf + (s - buf);
adamc@854 125
adamc@854 126 buf = new_buf;
adamc@854 127 }
adamc@854 128
adamc@854 129 r = recv(sock, back, buf_size - 1 - (back - buf), 0);
adamc@854 130
adamc@854 131 if (r < 0) {
adamc@854 132 fprintf(stderr, "Recv failed\n");
adamc@854 133 close(sock);
adamc@854 134 goto done;
adamc@854 135 }
adamc@854 136
adamc@854 137 if (r == 0) {
adamc@854 138 fprintf(stderr, "Connection closed.\n");
adamc@854 139 close(sock);
adamc@854 140 goto done;
adamc@854 141 }
adamc@854 142
adamc@854 143 back += r;
adamc@854 144 *back = 0;
adamc@854 145 }
adamc@167 146 }
adamc@138 147
adamc@1119 148 body[-4] = '\r';
adamc@1119 149 body[-3] = '\n';
adamc@1119 150
adamc@854 151 if (!(s = strstr(buf, "\r\n"))) {
adamc@854 152 fprintf(stderr, "No newline in request\n");
adamc@854 153 close(sock);
adamc@854 154 goto done;
adamc@854 155 }
adamc@854 156
adamc@1119 157 body[-4] = body[-3] = 0;
adamc@1119 158
adamc@854 159 *s = 0;
adamc@854 160 headers = s + 2;
adamc@854 161 method = s = buf;
adamc@854 162
adamc@854 163 if (!strsep(&s, " ")) {
adamc@854 164 fprintf(stderr, "No first space in HTTP command\n");
adamc@854 165 close(sock);
adamc@854 166 goto done;
adamc@854 167 }
adamc@854 168 path = s;
adamc@854 169
adamc@1134 170 if ((s = strchr(path, ' ')))
adamc@854 171 *s = 0;
adamc@854 172
adamc@1134 173 if ((s = strchr(path, '?'))) {
adamc@854 174 *s = 0;
adamc@854 175 query_string = s+1;
adamc@854 176 }
adamc@854 177 else
adamc@854 178 query_string = NULL;
adamc@854 179
adamc@854 180 s = headers;
adamc@1134 181 while ((s2 = strchr(s, '\r'))) {
adamc@854 182 s = s2;
adamc@854 183
adamc@854 184 if (s[1] == 0)
adamc@854 185 break;
adamc@854 186
adamc@854 187 *s = 0;
adamc@854 188 s += 2;
adamc@854 189 }
adamc@854 190
adamc@854 191 uw_set_headers(ctx, get_header, headers);
adamc@854 192
adamc@856 193 rr = uw_request(rc, ctx, method, path, query_string, body, back - body,
adamc@856 194 on_success, on_failure,
adamc@856 195 NULL, log_error, log_debug,
adamc@863 196 sock, uw_really_send, close);
adamc@311 197 uw_send(ctx, sock);
adamc@138 198
adamc@853 199 if (rr == SERVED || rr == FAILED)
adamc@853 200 close(sock);
adamc@853 201 else if (rr != KEEP_OPEN)
adamc@853 202 fprintf(stderr, "Illegal uw_request return code: %d\n", rr);
adamc@853 203
adamc@138 204 break;
adamc@138 205 }
adamc@116 206 }
adamc@116 207
adamc@854 208 done:
adamc@311 209 uw_reset(ctx);
adamc@116 210 }
adamc@1138 211
adamc@1138 212 return NULL;
adamc@116 213 }
adamc@102 214
adamc@477 215 static void help(char *cmd) {
adamc@477 216 printf("Usage: %s [-p <port>] [-t <thread-count>]\n", cmd);
adamc@477 217 }
adamc@477 218
adamc@502 219 static void sigint(int signum) {
adamc@502 220 printf("Exiting....\n");
adamc@502 221 exit(0);
adamc@502 222 }
adamc@502 223
adamc@1094 224 static loggers ls = {&uw_application, NULL, log_error, log_debug};
adamc@856 225
adamc@138 226 int main(int argc, char *argv[]) {
adamc@116 227 // The skeleton for this function comes from Beej's sockets tutorial.
adamc@138 228 int sockfd; // listen on sock_fd
adamc@116 229 struct sockaddr_in my_addr;
adamc@116 230 struct sockaddr_in their_addr; // connector's address information
adamc@1134 231 socklen_t sin_size;
adamc@1134 232 int yes = 1, uw_port = 8080, nthreads = 1, i, *names, opt;
adamc@502 233
adamc@502 234 signal(SIGINT, sigint);
adamc@505 235 signal(SIGPIPE, SIG_IGN);
adamc@505 236
adamc@477 237 while ((opt = getopt(argc, argv, "hp:t:")) != -1) {
adamc@472 238 switch (opt) {
adamc@472 239 case '?':
adamc@472 240 fprintf(stderr, "Unknown command-line option");
adamc@477 241 help(argv[0]);
adamc@472 242 return 1;
adamc@138 243
adamc@477 244 case 'h':
adamc@477 245 help(argv[0]);
adamc@477 246 return 0;
adamc@477 247
adamc@472 248 case 'p':
adamc@472 249 uw_port = atoi(optarg);
adamc@472 250 if (uw_port <= 0) {
adamc@472 251 fprintf(stderr, "Invalid port number\n");
adamc@477 252 help(argv[0]);
adamc@472 253 return 1;
adamc@472 254 }
adamc@472 255 break;
adamc@472 256
adamc@472 257 case 't':
adamc@472 258 nthreads = atoi(optarg);
adamc@472 259 if (nthreads <= 0) {
adamc@472 260 fprintf(stderr, "Invalid thread count\n");
adamc@477 261 help(argv[0]);
adamc@472 262 return 1;
adamc@472 263 }
adamc@472 264 break;
adamc@472 265
adamc@472 266 default:
adamc@472 267 fprintf(stderr, "Unexpected getopt() behavior\n");
adamc@472 268 return 1;
adamc@472 269 }
adamc@138 270 }
adamc@138 271
adamc@1094 272 uw_request_init(&uw_application, NULL, log_error, log_debug);
adamc@687 273
adamc@138 274 names = calloc(nthreads, sizeof(int));
adamc@116 275
adamc@116 276 sockfd = socket(PF_INET, SOCK_STREAM, 0); // do some error checking!
adamc@116 277
adamc@116 278 if (sockfd < 0) {
adamc@116 279 fprintf(stderr, "Listener socket creation failed\n");
adamc@116 280 return 1;
adamc@116 281 }
adamc@116 282
adamc@116 283 if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) < 0) {
adamc@116 284 fprintf(stderr, "Listener socket option setting failed\n");
adamc@116 285 return 1;
adamc@116 286 }
adamc@116 287
adamc@116 288 my_addr.sin_family = AF_INET; // host byte order
adamc@311 289 my_addr.sin_port = htons(uw_port); // short, network byte order
adamc@116 290 my_addr.sin_addr.s_addr = INADDR_ANY; // auto-fill with my IP
adamc@116 291 memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);
adamc@116 292
adamc@116 293 if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr) < 0) {
adamc@116 294 fprintf(stderr, "Listener socket bind failed\n");
adamc@116 295 return 1;
adamc@116 296 }
adamc@116 297
adamc@311 298 if (listen(sockfd, uw_backlog) < 0) {
adamc@116 299 fprintf(stderr, "Socket listen failed\n");
adamc@116 300 return 1;
adamc@116 301 }
adamc@116 302
adamc@116 303 sin_size = sizeof their_addr;
adamc@116 304
adamc@311 305 printf("Listening on port %d....\n", uw_port);
adamc@116 306
adamc@667 307 {
adamc@667 308 pthread_t thread;
adamc@667 309
adamc@856 310 if (pthread_create(&thread, NULL, client_pruner, &ls)) {
adamc@667 311 fprintf(stderr, "Error creating pruner thread\n");
adamc@667 312 return 1;
adamc@667 313 }
adamc@667 314 }
adamc@667 315
adamc@138 316 for (i = 0; i < nthreads; ++i) {
adamc@138 317 pthread_t thread;
adamc@138 318 names[i] = i;
adamc@138 319 if (pthread_create(&thread, NULL, worker, &names[i])) {
adamc@138 320 fprintf(stderr, "Error creating worker thread #%d\n", i);
adamc@138 321 return 1;
adamc@138 322 }
adamc@138 323 }
adamc@138 324
adamc@116 325 while (1) {
adamc@138 326 int new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);
adamc@116 327
adamc@116 328 if (new_fd < 0) {
adamc@116 329 fprintf(stderr, "Socket accept failed\n");
adamc@116 330 return 1;
adamc@116 331 }
adamc@116 332
adamc@116 333 printf("Accepted connection.\n");
adamc@138 334
adamc@859 335 uw_enqueue(new_fd);
adamc@116 336 }
adamc@102 337 }
adamc@1121 338
adamc@1121 339 void *uw_init_client_data() {
adamc@1121 340 return NULL;
adamc@1121 341 }
adamc@1121 342
adamc@1121 343 void uw_free_client_data(void *data) {
adamc@1121 344 }
adamc@1121 345
adamc@1121 346 void uw_copy_client_data(void *dst, void *src) {
adamc@1121 347 }
adamc@1121 348
adamc@1121 349 void uw_do_expunge(uw_context ctx, uw_Basis_client cli, void *data) {
adamc@1121 350 if (uw_get_app(ctx)->db_begin(ctx))
adamc@1121 351 uw_error(ctx, FATAL, "Error running SQL BEGIN");
adamc@1121 352 uw_get_app(ctx)->expunger(ctx, cli);
adamc@1121 353 if (uw_get_app(ctx)->db_commit(ctx))
adamc@1121 354 uw_error(ctx, FATAL, "Error running SQL COMMIT");
adamc@1121 355 }
adamc@1121 356
adamc@1121 357 void uw_post_expunge(uw_context ctx, void *data) {
adamc@1121 358 }