src/http.c

   1 /* This file is part of Pazpar2.
   2    Copyright (C) 2006-2013 Index Data
   3
   4 Pazpar2 is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17
  18 */
  19
  20 #if HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #if HAVE_SYS_TIME_H
  25 #include <sys/time.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #ifdef WIN32
  30 #include <winsock2.h>
  31 #include <ws2tcpip.h>
  32 typedef int socklen_t;
  33 #endif
  34
  35 #if HAVE_SYS_SOCKET_H
  36 #include <sys/socket.h>
  37 #endif
  38
  39 #include <sys/types.h>
  40
  41 #include <yaz/snprintf.h>
  42 #if HAVE_UNISTD_H
  43 #include <unistd.h>
  44 #endif
  45
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <ctype.h>
  49 #include <fcntl.h>
  50 #if HAVE_NETDB_H
  51 #include <netdb.h>
  52 #endif
  53
  54 #include <errno.h>
  55 #include <assert.h>
  56 #include <string.h>
  57
  58 #include <yaz/yaz-util.h>
  59 #include <yaz/comstack.h>
  60 #include <yaz/nmem.h>
  61 #include <yaz/mutex.h>
  62
  63 #include "ppmutex.h"
  64 #include "session.h"
  65 #include "http.h"
  66 #include "parameters.h"
  67
  68 #define MAX_HTTP_HEADER 4096
  69
  70 #ifdef WIN32
  71 #define strncasecmp _strnicmp
  72 #define strcasecmp _stricmp
  73 #endif
  74
  75 struct http_buf
  76 {
  77 #define HTTP_BUF_SIZE 4096
  78     char buf[4096];
  79     int offset;
  80     int len;
  81     struct http_buf *next;
  82 };
  83
  84
  85 static void proxy_io(IOCHAN i, int event);
  86 static struct http_channel *http_channel_create(http_server_t http_server,
  87                                                 const char *addr,
  88                                                 struct conf_server *server);
  89 static void http_channel_destroy(IOCHAN i);
  90 static http_server_t http_server_create(void);
  91 static void http_server_incref(http_server_t hs);
  92
  93 #ifdef WIN32
  94 #define CLOSESOCKET(x) closesocket(x)
  95 #else
  96 #define CLOSESOCKET(x) close(x)
  97 #endif
  98
  99 struct http_server
 100 {
 101     YAZ_MUTEX mutex;
 102     int listener_socket;
 103     int ref_count;
 104     http_sessions_t http_sessions;
 105     struct sockaddr_in *proxy_addr;
 106     FILE *record_file;
 107 };
 108
 109 struct http_channel_observer_s {
 110     void *data;
 111     void *data2;
 112     http_channel_destroy_t destroy;
 113     struct http_channel_observer_s *next;
 114     struct http_channel *chan;
 115 };
 116
 117
 118 const char *http_lookup_header(struct http_header *header,
 119                                const char *name)
 120 {
 121     for (; header; header = header->next)
 122         if (!strcasecmp(name, header->name))
 123             return header->value;
 124     return 0;
 125 }
 126
 127 static struct http_buf *http_buf_create(http_server_t hs)
 128 {
 129     struct http_buf *r = xmalloc(sizeof(*r));
 130     r->offset = 0;
 131     r->len = 0;
 132     r->next = 0;
 133     return r;
 134 }
 135
 136 static void http_buf_destroy(http_server_t hs, struct http_buf *b)
 137 {
 138     xfree(b);
 139 }
 140
 141 static void http_buf_destroy_queue(http_server_t hs, struct http_buf *b)
 142 {
 143     struct http_buf *p;
 144     while (b)
 145     {
 146         p = b->next;
 147         http_buf_destroy(hs, b);
 148         b = p;
 149     }
 150 }
 151
 152 static struct http_buf *http_buf_bybuf(http_server_t hs, char *b, int len)
 153 {
 154     struct http_buf *res = 0;
 155     struct http_buf **p = &res;
 156
 157     while (len)
 158     {
 159         int tocopy = len;
 160         if (tocopy > HTTP_BUF_SIZE)
 161             tocopy = HTTP_BUF_SIZE;
 162         *p = http_buf_create(hs);
 163         memcpy((*p)->buf, b, tocopy);
 164         (*p)->len = tocopy;
 165         len -= tocopy;
 166         b += tocopy;
 167         p = &(*p)->next;
 168     }
 169     return res;
 170 }
 171
 172 // Add a (chain of) buffers to the end of an existing queue.
 173 static void http_buf_enqueue(struct http_buf **queue, struct http_buf *b)
 174 {
 175     while (*queue)
 176         queue = &(*queue)->next;
 177     *queue = b;
 178 }
 179
 180 static struct http_buf *http_buf_bywrbuf(http_server_t hs, WRBUF wrbuf)
 181 {
 182     // Heavens to Betsy (buf)!
 183     return http_buf_bybuf(hs, wrbuf_buf(wrbuf), wrbuf_len(wrbuf));
 184 }
 185
 186 // Non-destructively collapse chain of buffers into a string (max *len)
 187 // Return
 188 static void http_buf_peek(struct http_buf *b, char *buf, int len)
 189 {
 190     int rd = 0;
 191     while (b && rd < len)
 192     {
 193         int toread = len - rd;
 194         if (toread > b->len)
 195             toread = b->len;
 196         memcpy(buf + rd, b->buf + b->offset, toread);
 197         rd += toread;
 198         b = b->next;
 199     }
 200     buf[rd] = '\0';
 201 }
 202
 203 static int http_buf_size(struct http_buf *b)
 204 {
 205     int sz = 0;
 206     for (; b; b = b->next)
 207         sz += b->len;
 208     return sz;
 209 }
 210
 211 // Ddestructively munch up to len  from head of queue.
 212 static int http_buf_read(http_server_t hs,
 213                          struct http_buf **b, char *buf, int len)
 214 {
 215     int rd = 0;
 216     while ((*b) && rd < len)
 217     {
 218         int toread = len - rd;
 219         if (toread > (*b)->len)
 220             toread = (*b)->len;
 221         memcpy(buf + rd, (*b)->buf + (*b)->offset, toread);
 222         rd += toread;
 223         if (toread < (*b)->len)
 224         {
 225             (*b)->len -= toread;
 226             (*b)->offset += toread;
 227             break;
 228         }
 229         else
 230         {
 231             struct http_buf *n = (*b)->next;
 232             http_buf_destroy(hs, *b);
 233             *b = n;
 234         }
 235     }
 236     buf[rd] = '\0';
 237     return rd;
 238 }
 239
 240 // Buffers may overlap.
 241 static void urldecode(char *i, char *o)
 242 {
 243     while (*i)
 244     {
 245         if (*i == '+')
 246         {
 247             *(o++) = ' ';
 248             i++;
 249         }
 250         else if (*i == '%' && i[1] && i[2])
 251         {
 252             int v;
 253             i++;
 254             sscanf(i, "%2x", &v);
 255             *o++ = v;
 256             i += 2;
 257         }
 258         else
 259             *(o++) = *(i++);
 260     }
 261     *o = '\0';
 262 }
 263
 264 // Warning: Buffers may not overlap
 265 void urlencode(const char *i, char *o)
 266 {
 267     while (*i)
 268     {
 269         if (strchr(" /:", *i))
 270         {
 271             sprintf(o, "%%%.2X", (int) *i);
 272             o += 3;
 273         }
 274         else
 275             *(o++) = *i;
 276         i++;
 277     }
 278     *o = '\0';
 279 }
 280
 281 void http_addheader(struct http_response *r, const char *name, const char *value)
 282 {
 283     struct http_channel *c = r->channel;
 284     struct http_header *h = nmem_malloc(c->nmem, sizeof *h);
 285     h->name = nmem_strdup(c->nmem, name);
 286     h->value = nmem_strdup(c->nmem, value);
 287     h->next = r->headers;
 288     r->headers = h;
 289 }
 290
 291 const char *http_argbyname(struct http_request *r, const char *name)
 292 {
 293     struct http_argument *p;
 294     if (!name)
 295         return 0;
 296     for (p = r->arguments; p; p = p->next)
 297         if (!strcmp(p->name, name))
 298             return p->value;
 299     return 0;
 300 }
 301
 302 const char *http_headerbyname(struct http_header *h, const char *name)
 303 {
 304     for (; h; h = h->next)
 305         if (!strcmp(h->name, name))
 306             return h->value;
 307     return 0;
 308 }
 309
 310 struct http_response *http_create_response(struct http_channel *c)
 311 {
 312     struct http_response *r = nmem_malloc(c->nmem, sizeof(*r));
 313     strcpy(r->code, "200");
 314     r->msg = "OK";
 315     r->channel = c;
 316     r->headers = 0;
 317     r->payload = 0;
 318     r->content_type = "text/xml";
 319     return r;
 320 }
 321
 322
 323 static const char *next_crlf(const char *cp, size_t *skipped)
 324 {
 325     const char *next_cp = strchr(cp, '\n');
 326     if (next_cp)
 327     {
 328         if (next_cp > cp && next_cp[-1] == '\r')
 329             *skipped = next_cp - cp - 1;
 330         else
 331             *skipped = next_cp - cp;
 332         next_cp++;
 333     }
 334     return next_cp;
 335 }
 336
 337 // Check if buf contains a package (minus payload)
 338 static int package_check(const char *buf, int sz)
 339 {
 340     int content_len = 0;
 341     int len = 0;
 342
 343     while (*buf)
 344     {
 345         size_t skipped = 0;
 346         const char *b = next_crlf(buf, &skipped);
 347
 348         if (!b)
 349         {
 350             // we did not find CRLF.. See if buffer is too large..
 351             if (sz >= MAX_HTTP_HEADER-1)
 352                 return MAX_HTTP_HEADER-1; // yes. Return that (will fail later)
 353             break;
 354         }
 355         len += (b - buf);
 356         if (skipped == 0)
 357         {
 358             // CRLF CRLF , i.e. end of header
 359             if (len + content_len <= sz)
 360                 return len + content_len;
 361             break;
 362         }
 363         buf = b;
 364         // following first skip of \r\n so that we don't consider Method
 365         if (!strncasecmp(buf, "Content-Length:", 15))
 366         {
 367             const char *cp = buf+15;
 368             while (*cp == ' ')
 369                 cp++;
 370             content_len = 0;
 371             while (*cp && isdigit(*(const unsigned char *)cp))
 372                 content_len = content_len*10 + (*cp++ - '0');
 373             if (content_len < 0) /* prevent negative offsets */
 374                 content_len = 0;
 375         }
 376     }
 377     return 0;     // incomplete request
 378 }
 379
 380 // Check if we have a request. Return 0 or length
 381 static int request_check(struct http_buf *queue)
 382 {
 383     char tmp[MAX_HTTP_HEADER];
 384
 385     // only peek at the header..
 386     http_buf_peek(queue, tmp, MAX_HTTP_HEADER-1);
 387     // still we only return non-zero if the complete request is received..
 388     return package_check(tmp, http_buf_size(queue));
 389 }
 390
 391 struct http_response *http_parse_response_buf(struct http_channel *c, const char *buf, int len)
 392 {
 393     char tmp[MAX_HTTP_HEADER];
 394     struct http_response *r = http_create_response(c);
 395     char *p, *p2;
 396     struct http_header **hp = &r->headers;
 397
 398     if (len >= MAX_HTTP_HEADER)
 399         return 0;
 400     memcpy(tmp, buf, len);
 401     for (p = tmp; *p && *p != ' '; p++) // Skip HTTP version
 402         ;
 403     p++;
 404     // Response code
 405     for (p2 = p; *p2 && *p2 != ' ' && p2 - p < 3; p2++)
 406         r->code[p2 - p] = *p2;
 407     if (!(p = strstr(tmp, "\r\n")))
 408         return 0;
 409     p += 2;
 410     while (*p)
 411     {
 412         if (!(p2 = strstr(p, "\r\n")))
 413             return 0;
 414         if (p == p2) // End of headers
 415             break;
 416         else
 417         {
 418             struct http_header *h = *hp = nmem_malloc(c->nmem, sizeof(*h));
 419             char *value = strchr(p, ':');
 420             if (!value)
 421                 return 0;
 422             *(value++) = '\0';
 423             h->name = nmem_strdup(c->nmem, p);
 424             while (isspace(*(const unsigned char *) value))
 425                 value++;
 426             if (value >= p2)  // Empty header;
 427             {
 428                 h->value = "";
 429                 p = p2 + 2;
 430                 continue;
 431             }
 432             *p2 = '\0';
 433             h->value = nmem_strdup(c->nmem, value);
 434             h->next = 0;
 435             hp = &h->next;
 436             p = p2 + 2;
 437         }
 438     }
 439     return r;
 440 }
 441
 442 static int http_parse_arguments(struct http_request *r, NMEM nmem,
 443                                 const char *args)
 444 {
 445     const char *p2 = args;
 446
 447     while (*p2)
 448     {
 449         struct http_argument *a;
 450         const char *equal = strchr(p2, '=');
 451         const char *eoa = strchr(p2, '&');
 452         if (!equal)
 453         {
 454             yaz_log(YLOG_WARN, "Expected '=' in argument");
 455             return -1;
 456         }
 457         if (!eoa)
 458             eoa = equal + strlen(equal); // last argument
 459         else if (equal > eoa)
 460         {
 461             yaz_log(YLOG_WARN, "Missing '&' in argument");
 462             return -1;
 463         }
 464         a = nmem_malloc(nmem, sizeof(struct http_argument));
 465         a->name = nmem_strdupn(nmem, p2, equal - p2);
 466         a->value = nmem_strdupn(nmem, equal+1, eoa - equal - 1);
 467         urldecode(a->name, a->name);
 468         urldecode(a->value, a->value);
 469         a->next = r->arguments;
 470         r->arguments = a;
 471         p2 = eoa;
 472         while (*p2 == '&')
 473             p2++;
 474     }
 475     return 0;
 476 }
 477
 478 struct http_request *http_parse_request(struct http_channel *c,
 479                                         struct http_buf **queue,
 480                                         int len)
 481 {
 482     struct http_request *r = nmem_malloc(c->nmem, sizeof(*r));
 483     char *p, *p2;
 484     char *start = nmem_malloc(c->nmem, len+1);
 485     char *buf = start;
 486
 487     if (http_buf_read(c->http_server, queue, buf, len) < len)
 488     {
 489         yaz_log(YLOG_WARN, "http_buf_read < len (%d)", len);
 490         return 0;
 491     }
 492     r->search = "";
 493     r->channel = c;
 494     r->arguments = 0;
 495     r->headers = 0;
 496     r->content_buf = 0;
 497     r->content_len = 0;
 498     // Parse first line
 499     for (p = buf, p2 = r->method; *p && *p != ' ' && p - buf < 19; p++)
 500         *(p2++) = *p;
 501     if (*p != ' ')
 502     {
 503         yaz_log(YLOG_WARN, "Unexpected HTTP method in request");
 504         return 0;
 505     }
 506     *p2 = '\0';
 507
 508     if (!(buf = strchr(buf, ' ')))
 509     {
 510         yaz_log(YLOG_WARN, "Missing Request-URI in HTTP request");
 511         return 0;
 512     }
 513     buf++;
 514     if (!(p = strchr(buf, ' ')))
 515     {
 516         yaz_log(YLOG_WARN, "HTTP Request-URI not terminated (too long?)");
 517         return 0;
 518     }
 519     *(p++) = '\0';
 520     if ((p2 = strchr(buf, '?'))) // Do we have arguments?
 521         *(p2++) = '\0';
 522     r->path = nmem_strdup(c->nmem, buf);
 523     if (p2)
 524     {
 525         r->search = nmem_strdup(c->nmem, p2);
 526         // Parse Arguments
 527         http_parse_arguments(r, c->nmem, p2);
 528     }
 529     buf = p;
 530
 531     if (strncmp(buf, "HTTP/", 5))
 532         strcpy(r->http_version, "1.0");
 533     else
 534     {
 535         size_t skipped;
 536         buf += 5; // strlen("HTTP/")
 537
 538         p = (char*) next_crlf(buf, &skipped);
 539         if (!p || skipped < 3 || skipped > 5)
 540             return 0;
 541
 542         memcpy(r->http_version, buf, skipped);
 543         r->http_version[skipped] = '\0';
 544         buf = p;
 545     }
 546     strcpy(c->version, r->http_version);
 547
 548     r->headers = 0;
 549     while (*buf)
 550     {
 551         size_t skipped;
 552
 553         p = (char *) next_crlf(buf, &skipped);
 554         if (!p)
 555         {
 556             return 0;
 557         }
 558         else if (skipped == 0)
 559         {
 560             buf = p;
 561             break;
 562         }
 563         else
 564         {
 565             char *cp;
 566             char *n_v = nmem_malloc(c->nmem, skipped+1);
 567             struct http_header *h = nmem_malloc(c->nmem, sizeof(*h));
 568
 569             memcpy(n_v, buf, skipped);
 570             n_v[skipped] = '\0';
 571
 572             if (!(cp = strchr(n_v, ':')))
 573                 return 0;
 574             h->name = nmem_strdupn(c->nmem, n_v, cp - n_v);
 575             cp++;
 576             while (isspace(*cp))
 577                 cp++;
 578             h->value = nmem_strdup(c->nmem, cp);
 579             h->next = r->headers;
 580             r->headers = h;
 581             buf = p;
 582         }
 583     }
 584
 585     // determine if we do keep alive
 586     if (!strcmp(c->version, "1.0"))
 587     {
 588         const char *v = http_lookup_header(r->headers, "Connection");
 589         if (v && !strcmp(v, "Keep-Alive"))
 590             c->keep_alive = 1;
 591         else
 592             c->keep_alive = 0;
 593     }
 594     else
 595     {
 596         const char *v = http_lookup_header(r->headers, "Connection");
 597         if (v && !strcmp(v, "close"))
 598             c->keep_alive = 0;
 599         else
 600             c->keep_alive = 1;
 601     }
 602     if (buf < start + len)
 603     {
 604         const char *content_type = http_lookup_header(r->headers,
 605                                                       "Content-Type");
 606         r->content_len = start + len - buf;
 607         r->content_buf = buf;
 608
 609         if (!yaz_strcmp_del("application/x-www-form-urlencoded",
 610                             content_type, "; "))
 611         {
 612             http_parse_arguments(r, c->nmem, r->content_buf);
 613         }
 614     }
 615     return r;
 616 }
 617
 618 static struct http_buf *http_serialize_response(struct http_channel *c,
 619         struct http_response *r)
 620 {
 621     struct http_header *h;
 622
 623     wrbuf_rewind(c->wrbuf);
 624
 625     wrbuf_printf(c->wrbuf, "HTTP/%s %s %s\r\n", c->version, r->code, r->msg);
 626     for (h = r->headers; h; h = h->next)
 627         wrbuf_printf(c->wrbuf, "%s: %s\r\n", h->name, h->value);
 628     if (r->payload)
 629     {
 630         wrbuf_printf(c->wrbuf, "Content-Length: %d\r\n", r->payload ?
 631                 (int) strlen(r->payload) : 0);
 632         wrbuf_printf(c->wrbuf, "Content-Type: %s\r\n", r->content_type);
 633         if (!strcmp(r->content_type, "text/xml"))
 634         {
 635             xmlDoc *doc = xmlParseMemory(r->payload, strlen(r->payload));
 636             if (doc)
 637             {
 638                 xmlFreeDoc(doc);
 639             }
 640             else
 641             {
 642                 yaz_log(YLOG_WARN, "Sending non-wellformed "
 643                         "response (bug #1162");
 644                 yaz_log(YLOG_WARN, "payload: %s", r->payload);
 645             }
 646         }
 647     }
 648     wrbuf_puts(c->wrbuf, "\r\n");
 649
 650     if (r->payload)
 651         wrbuf_puts(c->wrbuf, r->payload);
 652
 653     if (global_parameters.dump_records > 1)
 654     {
 655         FILE *lf = yaz_log_file();
 656         yaz_log(YLOG_LOG, "Response:");
 657         fwrite(wrbuf_buf(c->wrbuf), 1, wrbuf_len(c->wrbuf), lf);
 658     }
 659     return http_buf_bywrbuf(c->http_server, c->wrbuf);
 660 }
 661
 662 // Serialize a HTTP request
 663 static struct http_buf *http_serialize_request(struct http_request *r)
 664 {
 665     struct http_channel *c = r->channel;
 666     struct http_header *h;
 667
 668     wrbuf_rewind(c->wrbuf);
 669     wrbuf_printf(c->wrbuf, "%s %s%s%s", r->method, r->path,
 670                  *r->search ? "?" : "", r->search);
 671
 672     wrbuf_printf(c->wrbuf, " HTTP/%s\r\n", r->http_version);
 673
 674     for (h = r->headers; h; h = h->next)
 675         wrbuf_printf(c->wrbuf, "%s: %s\r\n", h->name, h->value);
 676
 677     wrbuf_puts(c->wrbuf, "\r\n");
 678
 679     if (r->content_buf)
 680         wrbuf_write(c->wrbuf, r->content_buf, r->content_len);
 681
 682 #if 0
 683     yaz_log(YLOG_LOG, "WRITING TO PROXY:\n%s\n----",
 684             wrbuf_cstr(c->wrbuf));
 685 #endif
 686     return http_buf_bywrbuf(c->http_server, c->wrbuf);
 687 }
 688
 689
 690 static int http_weshouldproxy(struct http_request *rq)
 691 {
 692     struct http_channel *c = rq->channel;
 693     if (c->server->http_server->proxy_addr && !strstr(rq->path, "search.pz2"))
 694         return 1;
 695     return 0;
 696 }
 697
 698
 699 struct http_header * http_header_append(struct http_channel *ch,
 700                                         struct http_header * hp,
 701                                         const char *name,
 702                                         const char *value)
 703 {
 704     struct http_header *hpnew = 0;
 705
 706     if (!hp | !ch)
 707         return 0;
 708
 709     while (hp && hp->next)
 710         hp = hp->next;
 711
 712     if(name && strlen(name)&& value && strlen(value)){
 713         hpnew = nmem_malloc(ch->nmem, sizeof *hpnew);
 714         hpnew->name = nmem_strdup(ch->nmem, name);
 715         hpnew->value = nmem_strdup(ch->nmem, value);
 716
 717         hpnew->next = 0;
 718         hp->next = hpnew;
 719         hp = hp->next;
 720
 721         return hpnew;
 722     }
 723
 724     return hp;
 725 }
 726
 727
 728 static int is_inprogress(void)
 729 {
 730 #ifdef WIN32
 731     if (WSAGetLastError() == WSAEWOULDBLOCK)
 732         return 1;
 733 #else
 734     if (errno == EINPROGRESS)
 735         return 1;
 736 #endif
 737     return 0;
 738 }
 739
 740 static void enable_nonblock(int sock)
 741 {
 742     int flags;
 743 #ifdef WIN32
 744     flags = (flags & CS_FLAGS_BLOCKING) ? 0 : 1;
 745     if (ioctlsocket(sock, FIONBIO, &flags) < 0)
 746         yaz_log(YLOG_FATAL|YLOG_ERRNO, "ioctlsocket");
 747 #else
 748     if ((flags = fcntl(sock, F_GETFL, 0)) < 0)
 749         yaz_log(YLOG_FATAL|YLOG_ERRNO, "fcntl");
 750     if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) < 0)
 751         yaz_log(YLOG_FATAL|YLOG_ERRNO, "fcntl2");
 752 #endif
 753 }
 754
 755 static int http_proxy(struct http_request *rq)
 756 {
 757     struct http_channel *c = rq->channel;
 758     struct http_proxy *p = c->proxy;
 759     struct http_header *hp;
 760     struct http_buf *requestbuf;
 761     char server_port[16] = "";
 762     struct conf_server *ser = c->server;
 763
 764     if (!p) // This is a new connection. Create a proxy channel
 765     {
 766         int sock;
 767         struct protoent *pe;
 768         int one = 1;
 769
 770         if (!(pe = getprotobyname("tcp"))) {
 771             abort();
 772         }
 773         if ((sock = socket(PF_INET, SOCK_STREAM, pe->p_proto)) < 0)
 774         {
 775             yaz_log(YLOG_WARN|YLOG_ERRNO, "socket");
 776             return -1;
 777         }
 778         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)
 779                         &one, sizeof(one)) < 0)
 780             abort();
 781         enable_nonblock(sock);
 782         if (connect(sock, (struct sockaddr *)
 783                     c->server->http_server->proxy_addr,
 784                     sizeof(*c->server->http_server->proxy_addr)) < 0)
 785         {
 786             if (!is_inprogress())
 787             {
 788                 yaz_log(YLOG_WARN|YLOG_ERRNO, "Proxy connect");
 789                 return -1;
 790             }
 791         }
 792         p = xmalloc(sizeof(struct http_proxy));
 793         p->oqueue = 0;
 794         p->channel = c;
 795         p->first_response = 1;
 796         c->proxy = p;
 797         // We will add EVENT_OUTPUT below
 798         p->iochan = iochan_create(sock, proxy_io, EVENT_INPUT, "http_proxy");
 799         iochan_setdata(p->iochan, p);
 800
 801         iochan_add(ser->iochan_man, p->iochan);
 802     }
 803
 804     // Do _not_ modify Host: header, just checking it's existence
 805
 806     if (!http_lookup_header(rq->headers, "Host"))
 807     {
 808         yaz_log(YLOG_WARN, "Failed to find Host header in proxy");
 809         return -1;
 810     }
 811
 812     // Add new header about paraz2 version, host, remote client address, etc.
 813     {
 814         char server_via[128];
 815
 816         hp = rq->headers;
 817         hp = http_header_append(c, hp,
 818                                 "X-Pazpar2-Version", PACKAGE_VERSION);
 819         hp = http_header_append(c, hp,
 820                                 "X-Pazpar2-Server-Host", ser->host);
 821         sprintf(server_port, "%d",  ser->port);
 822         hp = http_header_append(c, hp,
 823                                 "X-Pazpar2-Server-Port", server_port);
 824         yaz_snprintf(server_via, sizeof(server_via),
 825                      "1.1 %s:%s (%s/%s)",
 826                      ser->host ? ser->host : "@",
 827                      server_port, PACKAGE_NAME, PACKAGE_VERSION);
 828         hp = http_header_append(c, hp, "Via" , server_via);
 829         hp = http_header_append(c, hp, "X-Forwarded-For", c->addr);
 830     }
 831
 832     requestbuf = http_serialize_request(rq);
 833
 834     http_buf_enqueue(&p->oqueue, requestbuf);
 835     iochan_setflag(p->iochan, EVENT_OUTPUT);
 836     return 0;
 837 }
 838
 839 void http_send_response(struct http_channel *ch)
 840 {
 841     struct http_response *rs = ch->response;
 842     struct http_buf *hb;
 843
 844     assert(rs);
 845     hb = http_serialize_response(ch, rs);
 846     if (!hb)
 847     {
 848         yaz_log(YLOG_WARN, "Failed to serialize HTTP response");
 849         http_channel_destroy(ch->iochan);
 850     }
 851     else
 852     {
 853         http_buf_enqueue(&ch->oqueue, hb);
 854         iochan_setflag(ch->iochan, EVENT_OUTPUT);
 855         ch->state = Http_Idle;
 856     }
 857 }
 858
 859 static void http_error(struct http_channel *hc, int no, const char *msg)
 860 {
 861     struct http_response *rs = http_create_response(hc);
 862
 863     hc->response = rs;
 864     hc->keep_alive = 0;  // not keeping this HTTP session alive
 865
 866     sprintf(rs->code, "%d", no);
 867
 868     rs->msg = nmem_strdup(hc->nmem, msg);
 869     rs->payload = nmem_malloc(hc->nmem, 100);
 870     yaz_snprintf(rs->payload, 99, "<error>HTTP Error %d: %s</error>\n",
 871                  no, msg);
 872     http_send_response(hc);
 873 }
 874
 875 static void http_io(IOCHAN i, int event)
 876 {
 877     struct http_channel *hc = iochan_getdata(i);
 878     while (event)
 879     {
 880         if (event == EVENT_INPUT)
 881         {
 882             int res, reqlen;
 883             struct http_buf *htbuf;
 884
 885             htbuf = http_buf_create(hc->http_server);
 886             res = recv(iochan_getfd(i), htbuf->buf, HTTP_BUF_SIZE -1, 0);
 887             if (res == -1 && errno == EAGAIN)
 888             {
 889                 http_buf_destroy(hc->http_server, htbuf);
 890                 return;
 891             }
 892             if (res <= 0)
 893             {
 894 #if HAVE_SYS_TIME_H
 895                 if (hc->http_server->record_file)
 896                 {
 897                     struct timeval tv;
 898                     gettimeofday(&tv, 0);
 899                     fprintf(hc->http_server->record_file, "r %lld %lld %lld 0\n",
 900                             (long long) tv.tv_sec, (long long) tv.tv_usec,
 901                             (long long) iochan_getfd(i));
 902                 }
 903 #endif
 904                 http_buf_destroy(hc->http_server, htbuf);
 905                 fflush(hc->http_server->record_file);
 906                 http_channel_destroy(i);
 907                 return;
 908             }
 909             htbuf->buf[res] = '\0';
 910             htbuf->len = res;
 911             http_buf_enqueue(&hc->iqueue, htbuf);
 912
 913             while (1)
 914             {
 915                 if (hc->state == Http_Busy)
 916                     return;
 917                 reqlen = request_check(hc->iqueue);
 918                 if (reqlen <= 2)
 919                     return;
 920                 // we have a complete HTTP request
 921                 nmem_reset(hc->nmem);
 922 #if HAVE_SYS_TIME_H
 923                 if (hc->http_server->record_file)
 924                 {
 925                     struct timeval tv;
 926                     int sz = 0;
 927                     struct http_buf *hb;
 928                     for (hb = hc->iqueue; hb; hb = hb->next)
 929                         sz += hb->len;
 930                     gettimeofday(&tv, 0);
 931                     fprintf(hc->http_server->record_file, "r %lld %lld %lld %d\n",
 932                             (long long) tv.tv_sec, (long long) tv.tv_usec,
 933                             (long long) iochan_getfd(i), sz);
 934                     for (hb = hc->iqueue; hb; hb = hb->next)
 935                         fwrite(hb->buf, 1, hb->len, hc->http_server->record_file);
 936                     fflush(hc->http_server->record_file);
 937                 }
 938  #endif
 939                 if (!(hc->request = http_parse_request(hc, &hc->iqueue, reqlen)))
 940                 {
 941                     yaz_log(YLOG_WARN, "Failed to parse request");
 942                     http_error(hc, 400, "Bad Request");
 943                     return;
 944                 }
 945                 hc->response = 0;
 946                 yaz_log(YLOG_LOG, "Request: %s %s%s%s", hc->request->method,
 947                         hc->request->path,
 948                         *hc->request->search ? "?" : "",
 949                         hc->request->search);
 950                 if (hc->request->content_buf)
 951                     yaz_log(YLOG_LOG, "%s", hc->request->content_buf);
 952                 if (http_weshouldproxy(hc->request))
 953                     http_proxy(hc->request);
 954                 else
 955                 {
 956                     // Execute our business logic!
 957                     hc->state = Http_Busy;
 958                     http_command(hc);
 959                 }
 960             }
 961         }
 962         else if (event == EVENT_OUTPUT)
 963         {
 964             event = 0;
 965             if (hc->oqueue)
 966             {
 967                 struct http_buf *wb = hc->oqueue;
 968                 int res;
 969                 res = send(iochan_getfd(hc->iochan),
 970                            wb->buf + wb->offset, wb->len, 0);
 971                 if (res <= 0)
 972                 {
 973                     yaz_log(YLOG_WARN|YLOG_ERRNO, "write");
 974                     http_channel_destroy(i);
 975                     return;
 976                 }
 977                 if (res == wb->len)
 978                 {
 979 #if HAVE_SYS_TIME_H
 980                     if (hc->http_server->record_file)
 981                     {
 982                         struct timeval tv;
 983                         int sz = wb->offset + wb->len;
 984                         gettimeofday(&tv, 0);
 985                         fprintf(hc->http_server->record_file, "w %lld %lld %lld %d\n",
 986                                 (long long) tv.tv_sec, (long long) tv.tv_usec,
 987                                 (long long) iochan_getfd(i), sz);
 988                         fwrite(wb->buf, 1, wb->offset + wb->len,
 989                                hc->http_server->record_file);
 990                         fputc('\n', hc->http_server->record_file);
 991                         fflush(hc->http_server->record_file);
 992                     }
 993  #endif
 994                     hc->oqueue = hc->oqueue->next;
 995                     http_buf_destroy(hc->http_server, wb);
 996                 }
 997                 else
 998                 {
 999                     wb->len -= res;
1000                     wb->offset += res;
1001                 }
1002                 if (!hc->oqueue)
1003                 {
1004                     if (!hc->keep_alive)
1005                     {
1006                         http_channel_destroy(i);
1007                         return;
1008                     }
1009                     else
1010                     {
1011                         iochan_clearflag(i, EVENT_OUTPUT);
1012                         if (hc->iqueue)
1013                             event = EVENT_INPUT;
1014                     }
1015                 }
1016             }
1017             if (!hc->oqueue && hc->proxy && !hc->proxy->iochan)
1018                 http_channel_destroy(i); // Server closed; we're done
1019         }
1020         else
1021         {
1022             yaz_log(YLOG_WARN, "Unexpected event on connection");
1023             http_channel_destroy(i);
1024             event = 0;
1025         }
1026     }
1027 }
1028
1029 // Handles I/O on a client connection to a backend web server (proxy mode)
1030 static void proxy_io(IOCHAN pi, int event)
1031 {
1032     struct http_proxy *pc = iochan_getdata(pi);
1033     struct http_channel *hc = pc->channel;
1034
1035     switch (event)
1036     {
1037         int res;
1038         struct http_buf *htbuf;
1039
1040         case EVENT_INPUT:
1041             htbuf = http_buf_create(hc->http_server);
1042             res = recv(iochan_getfd(pi), htbuf->buf, HTTP_BUF_SIZE -1, 0);
1043             if (res == 0 || (res < 0 && !is_inprogress()))
1044             {
1045                 if (hc->oqueue)
1046                 {
1047                     yaz_log(YLOG_WARN, "Proxy read came up short");
1048                     // Close channel and alert client HTTP channel that we're gone
1049                     http_buf_destroy(hc->http_server, htbuf);
1050                     CLOSESOCKET(iochan_getfd(pi));
1051                     iochan_destroy(pi);
1052                     pc->iochan = 0;
1053                 }
1054                 else
1055                 {
1056                     http_channel_destroy(hc->iochan);
1057                     return;
1058                 }
1059             }
1060             else
1061             {
1062                 htbuf->buf[res] = '\0';
1063                 htbuf->offset = 0;
1064                 htbuf->len = res;
1065                 // Write any remaining payload
1066                 if (htbuf->len - htbuf->offset > 0)
1067                     http_buf_enqueue(&hc->oqueue, htbuf);
1068             }
1069             iochan_setflag(hc->iochan, EVENT_OUTPUT);
1070             break;
1071         case EVENT_OUTPUT:
1072             if (!(htbuf = pc->oqueue))
1073             {
1074                 iochan_clearflag(pi, EVENT_OUTPUT);
1075                 return;
1076             }
1077             res = send(iochan_getfd(pi), htbuf->buf + htbuf->offset, htbuf->len, 0);
1078             if (res <= 0)
1079             {
1080                 yaz_log(YLOG_WARN|YLOG_ERRNO, "write");
1081                 http_channel_destroy(hc->iochan);
1082                 return;
1083             }
1084             if (res == htbuf->len)
1085             {
1086                 struct http_buf *np = htbuf->next;
1087                 http_buf_destroy(hc->http_server, htbuf);
1088                 pc->oqueue = np;
1089             }
1090             else
1091             {
1092                 htbuf->len -= res;
1093                 htbuf->offset += res;
1094             }
1095
1096             if (!pc->oqueue) {
1097                 iochan_setflags(pi, EVENT_INPUT); // Turns off output flag
1098             }
1099             break;
1100         default:
1101             yaz_log(YLOG_WARN, "Unexpected event on connection");
1102             http_channel_destroy(hc->iochan);
1103             break;
1104     }
1105 }
1106
1107 static void http_fire_observers(struct http_channel *c);
1108 static void http_destroy_observers(struct http_channel *c);
1109
1110 // Cleanup channel
1111 static void http_channel_destroy(IOCHAN i)
1112 {
1113     struct http_channel *s = iochan_getdata(i);
1114     http_server_t http_server;
1115
1116     if (s->proxy)
1117     {
1118         if (s->proxy->iochan)
1119         {
1120             CLOSESOCKET(iochan_getfd(s->proxy->iochan));
1121             iochan_destroy(s->proxy->iochan);
1122         }
1123         http_buf_destroy_queue(s->http_server, s->proxy->oqueue);
1124         xfree(s->proxy);
1125     }
1126     http_buf_destroy_queue(s->http_server, s->iqueue);
1127     http_buf_destroy_queue(s->http_server, s->oqueue);
1128     http_fire_observers(s);
1129     http_destroy_observers(s);
1130
1131     http_server = s->http_server; /* save it for destroy (decref) */
1132
1133     http_server_destroy(http_server);
1134
1135     CLOSESOCKET(iochan_getfd(i));
1136
1137     iochan_destroy(i);
1138     nmem_destroy(s->nmem);
1139     wrbuf_destroy(s->wrbuf);
1140     xfree(s);
1141 }
1142
1143 static struct http_channel *http_channel_create(http_server_t hs,
1144                                                 const char *addr,
1145                                                 struct conf_server *server)
1146 {
1147     struct http_channel *r;
1148
1149     r = xmalloc(sizeof(struct http_channel));
1150     r->nmem = nmem_create();
1151     r->wrbuf = wrbuf_alloc();
1152
1153     http_server_incref(hs);
1154     r->http_server = hs;
1155     r->http_sessions = hs->http_sessions;
1156     assert(r->http_sessions);
1157     r->server = server;
1158     r->proxy = 0;
1159     r->iochan = 0;
1160     r->iqueue = r->oqueue = 0;
1161     r->state = Http_Idle;
1162     r->keep_alive = 0;
1163     r->request = 0;
1164     r->response = 0;
1165     strcpy(r->version, "1.0");
1166     if (!addr)
1167     {
1168         yaz_log(YLOG_WARN, "Invalid HTTP forward address");
1169         exit(1);
1170     }
1171     strcpy(r->addr, addr);
1172     r->observers = 0;
1173     return r;
1174 }
1175
1176
1177 /* Accept a new command connection */
1178 static void http_accept(IOCHAN i, int event)
1179 {
1180     char host[256];
1181     struct sockaddr addr;
1182     int fd = iochan_getfd(i);
1183     socklen_t len;
1184     int s;
1185     IOCHAN c;
1186     struct http_channel *ch;
1187     struct conf_server *server = iochan_getdata(i);
1188
1189     len = sizeof addr;
1190     if ((s = accept(fd, &addr, &len)) < 0)
1191     {
1192         yaz_log(YLOG_WARN|YLOG_ERRNO, "accept");
1193         return;
1194     }
1195     if (getnameinfo(&addr, len, host, sizeof(host)-1, 0, 0, NI_NUMERICHOST))
1196     {
1197         yaz_log(YLOG_WARN|YLOG_ERRNO, "getnameinfo");
1198         CLOSESOCKET(s);
1199         return;
1200     }
1201     enable_nonblock(s);
1202
1203     yaz_log(YLOG_DEBUG, "New command connection");
1204     c = iochan_create(s, http_io, EVENT_INPUT | EVENT_EXCEPT,
1205                       "http_session_socket");
1206
1207
1208     ch = http_channel_create(server->http_server, host, server);
1209     ch->iochan = c;
1210     iochan_setdata(c, ch);
1211     iochan_add(server->iochan_man, c);
1212 }
1213
1214 /* Create a http-channel listener, syntax [host:]port */
1215 int http_init(const char *addr, struct conf_server *server,
1216               const char *record_fname)
1217 {
1218     IOCHAN c;
1219     int l;
1220     int one = 1;
1221     const char *pp;
1222     FILE *record_file = 0;
1223     struct addrinfo hints, *ai = 0;
1224     int error;
1225     int ipv6_only = -1;
1226
1227     yaz_log(YLOG_LOG, "HTTP listener %s", addr);
1228
1229     hints.ai_flags = 0;
1230     hints.ai_family = AF_UNSPEC;
1231     hints.ai_socktype = SOCK_STREAM;
1232     hints.ai_protocol = 0;
1233     hints.ai_addrlen        = 0;
1234     hints.ai_addr           = NULL;
1235     hints.ai_canonname      = NULL;
1236     hints.ai_next           = NULL;
1237
1238     pp = strchr(addr, ':');
1239     if (pp)
1240     {
1241         WRBUF w = wrbuf_alloc();
1242         wrbuf_write(w, addr, pp - addr);
1243         if (!strcmp(wrbuf_cstr(w), "@"))
1244         {   /* IPV4 + IPV6 .. same as YAZ */
1245             ipv6_only = 0;
1246             hints.ai_flags = AI_PASSIVE;
1247             hints.ai_family = AF_INET6;
1248             error = getaddrinfo(0, pp + 1, &hints, &ai);
1249         }
1250         else
1251             error = getaddrinfo(wrbuf_cstr(w), pp + 1, &hints, &ai);
1252         wrbuf_destroy(w);
1253     }
1254     else
1255     {
1256         /* default for no host given is IPV4 */
1257         hints.ai_flags = AI_PASSIVE;
1258         hints.ai_family = AF_INET;
1259         error = getaddrinfo(0, addr, &hints, &ai);
1260     }
1261     if (error)
1262     {
1263         yaz_log(YLOG_FATAL, "Failed to resolve %s: %s", addr,
1264                 gai_strerror(error));
1265         return 1;
1266     }
1267     l = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1268     if (l < 0)
1269     {
1270         yaz_log(YLOG_FATAL|YLOG_ERRNO, "socket");
1271         freeaddrinfo(ai);
1272         return 1;
1273     }
1274     if (ipv6_only >= 0 &&
1275         setsockopt(l, IPPROTO_IPV6, IPV6_V6ONLY, &ipv6_only, sizeof(ipv6_only)))
1276     {
1277         yaz_log(YLOG_FATAL|YLOG_ERRNO, "setsockopt IPV6_V6ONLY %s %d", addr,
1278             ipv6_only);
1279         freeaddrinfo(ai);
1280         CLOSESOCKET(l);
1281         return 1;
1282     }
1283     if (setsockopt(l, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
1284     {
1285         yaz_log(YLOG_FATAL|YLOG_ERRNO, "setsockopt SO_REUSEADDR %s", addr);
1286         freeaddrinfo(ai);
1287         CLOSESOCKET(l);
1288         return 1;
1289     }
1290     if (bind(l, ai->ai_addr, ai->ai_addrlen) < 0)
1291     {
1292         yaz_log(YLOG_FATAL|YLOG_ERRNO, "bind %s", addr);
1293         freeaddrinfo(ai);
1294         CLOSESOCKET(l);
1295         return 1;
1296     }
1297     freeaddrinfo(ai);
1298     if (listen(l, SOMAXCONN) < 0)
1299     {
1300         yaz_log(YLOG_FATAL|YLOG_ERRNO, "listen %s", addr);
1301         CLOSESOCKET(l);
1302         return 1;
1303     }
1304
1305     if (record_fname)
1306     {
1307         record_file = fopen(record_fname, "wb");
1308         if (!record_file)
1309         {
1310             yaz_log(YLOG_FATAL|YLOG_ERRNO, "fopen %s", record_fname);
1311             CLOSESOCKET(l);
1312             return 1;
1313         }
1314     }
1315     server->http_server = http_server_create();
1316
1317     server->http_server->record_file = record_file;
1318     server->http_server->listener_socket = l;
1319
1320     c = iochan_create(l, http_accept, EVENT_INPUT | EVENT_EXCEPT, "http_server");
1321     iochan_setdata(c, server);
1322
1323     iochan_add(server->iochan_man, c);
1324     return 0;
1325 }
1326
1327 void http_close_server(struct conf_server *server)
1328 {
1329     /* break the event_loop (select) by closing down the HTTP listener sock */
1330     if (server->http_server->listener_socket)
1331     {
1332 #ifdef WIN32
1333         closesocket(server->http_server->listener_socket);
1334 #else
1335         close(server->http_server->listener_socket);
1336 #endif
1337     }
1338 }
1339
1340 void http_set_proxyaddr(const char *host, struct conf_server *server)
1341 {
1342     const char *p;
1343     short port;
1344     struct hostent *he;
1345     WRBUF w = wrbuf_alloc();
1346
1347     yaz_log(YLOG_LOG, "HTTP backend  %s", host);
1348
1349     p = strchr(host, ':');
1350     if (p)
1351     {
1352         port = atoi(p + 1);
1353         wrbuf_write(w, host, p - host);
1354         wrbuf_puts(w, "");
1355     }
1356     else
1357     {
1358         port = 80;
1359         wrbuf_puts(w, host);
1360     }
1361     if (!(he = gethostbyname(wrbuf_cstr(w))))
1362     {
1363         fprintf(stderr, "Failed to lookup '%s'\n", wrbuf_cstr(w));
1364         exit(1);
1365     }
1366     wrbuf_destroy(w);
1367
1368     server->http_server->proxy_addr = xmalloc(sizeof(struct sockaddr_in));
1369     server->http_server->proxy_addr->sin_family = he->h_addrtype;
1370     memcpy(&server->http_server->proxy_addr->sin_addr.s_addr,
1371            he->h_addr_list[0], he->h_length);
1372     server->http_server->proxy_addr->sin_port = htons(port);
1373 }
1374
1375 static void http_fire_observers(struct http_channel *c)
1376 {
1377     http_channel_observer_t p = c->observers;
1378     while (p)
1379     {
1380         p->destroy(p->data, c, p->data2);
1381         p = p->next;
1382     }
1383 }
1384
1385 static void http_destroy_observers(struct http_channel *c)
1386 {
1387     while (c->observers)
1388     {
1389         http_channel_observer_t obs = c->observers;
1390         c->observers = obs->next;
1391         xfree(obs);
1392     }
1393 }
1394
1395 http_channel_observer_t http_add_observer(struct http_channel *c, void *data,
1396                                           http_channel_destroy_t des)
1397 {
1398     http_channel_observer_t obs = xmalloc(sizeof(*obs));
1399     obs->chan = c;
1400     obs->data = data;
1401     obs->data2 = 0;
1402     obs->destroy= des;
1403     obs->next = c->observers;
1404     c->observers = obs;
1405     return obs;
1406 }
1407
1408 void http_remove_observer(http_channel_observer_t obs)
1409 {
1410     struct http_channel *c = obs->chan;
1411     http_channel_observer_t found, *p = &c->observers;
1412     while (*p != obs)
1413         p = &(*p)->next;
1414     found = *p;
1415     assert(found);
1416     *p = (*p)->next;
1417     xfree(found);
1418 }
1419
1420 struct http_channel *http_channel_observer_chan(http_channel_observer_t obs)
1421 {
1422     return obs->chan;
1423 }
1424
1425 void http_observer_set_data2(http_channel_observer_t obs, void *data2)
1426 {
1427     obs->data2 = data2;
1428 }
1429
1430 http_server_t http_server_create(void)
1431 {
1432     http_server_t hs = xmalloc(sizeof(*hs));
1433     hs->mutex = 0;
1434     hs->proxy_addr = 0;
1435     hs->ref_count = 1;
1436     hs->http_sessions = 0;
1437
1438     hs->record_file = 0;
1439     return hs;
1440 }
1441
1442 void http_server_destroy(http_server_t hs)
1443 {
1444     if (hs)
1445     {
1446         int r;
1447
1448         yaz_mutex_enter(hs->mutex); /* OK: hs->mutex may be NULL */
1449         r = --(hs->ref_count);
1450         yaz_mutex_leave(hs->mutex);
1451
1452         if (r == 0)
1453         {
1454             http_sessions_destroy(hs->http_sessions);
1455             xfree(hs->proxy_addr);
1456             yaz_mutex_destroy(&hs->mutex);
1457             if (hs->record_file)
1458                 fclose(hs->record_file);
1459             xfree(hs);
1460         }
1461     }
1462 }
1463
1464 void http_server_incref(http_server_t hs)
1465 {
1466     assert(hs);
1467     yaz_mutex_enter(hs->mutex);
1468     (hs->ref_count)++;
1469     yaz_mutex_leave(hs->mutex);
1470 }
1471
1472 void http_mutex_init(struct conf_server *server)
1473 {
1474     assert(server);
1475
1476     assert(server->http_server->mutex == 0);
1477     pazpar2_mutex_create(&server->http_server->mutex, "http_server");
1478     server->http_server->http_sessions = http_sessions_create();
1479 }
1480
1481 /*
1482  * Local variables:
1483  * c-basic-offset: 4
1484  * c-file-style: "Stroustrup"
1485  * indent-tabs-mode: nil
1486  * End:
1487  * vim: shiftwidth=4 tabstop=8 expandtab
1488  */
1489