src/http.c

   1 /* This file is part of Pazpar2.
   2    Copyright (C) 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     struct conf_server *ser = c->server;
 762
 763     if (!p) // This is a new connection. Create a proxy channel
 764     {
 765         int sock;
 766         struct protoent *pe;
 767         int one = 1;
 768
 769         if (!(pe = getprotobyname("tcp"))) {
 770             abort();
 771         }
 772         if ((sock = socket(PF_INET, SOCK_STREAM, pe->p_proto)) < 0)
 773         {
 774             yaz_log(YLOG_WARN|YLOG_ERRNO, "socket");
 775             return -1;
 776         }
 777         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)
 778                         &one, sizeof(one)) < 0)
 779             abort();
 780         enable_nonblock(sock);
 781         if (connect(sock, (struct sockaddr *)
 782                     c->server->http_server->proxy_addr,
 783                     sizeof(*c->server->http_server->proxy_addr)) < 0)
 784         {
 785             if (!is_inprogress())
 786             {
 787                 yaz_log(YLOG_WARN|YLOG_ERRNO, "Proxy connect");
 788                 return -1;
 789             }
 790         }
 791         p = xmalloc(sizeof(struct http_proxy));
 792         p->oqueue = 0;
 793         p->channel = c;
 794         p->first_response = 1;
 795         c->proxy = p;
 796         // We will add EVENT_OUTPUT below
 797         p->iochan = iochan_create(sock, proxy_io, EVENT_INPUT, "http_proxy");
 798         iochan_setdata(p->iochan, p);
 799
 800         iochan_add(ser->iochan_man, p->iochan);
 801     }
 802
 803     // Do _not_ modify Host: header, just checking it's existence
 804
 805     if (!http_lookup_header(rq->headers, "Host"))
 806     {
 807         yaz_log(YLOG_WARN, "Failed to find Host header in proxy");
 808         return -1;
 809     }
 810
 811     // Add new header about paraz2 version, host, remote client address, etc.
 812     {
 813         char server_via[128];
 814
 815         hp = rq->headers;
 816         hp = http_header_append(c, hp,
 817                                 "X-Pazpar2-Version", PACKAGE_VERSION);
 818         hp = http_header_append(c, hp,
 819                                 "X-Pazpar2-Server-Host", ser->host);
 820         hp = http_header_append(c, hp,
 821                                 "X-Pazpar2-Server-Port", ser->port);
 822         yaz_snprintf(server_via, sizeof(server_via),
 823                      "1.1 %s:%s (%s/%s)",
 824                      ser->host, ser->port,
 825                      PACKAGE_NAME, PACKAGE_VERSION);
 826         hp = http_header_append(c, hp, "Via" , server_via);
 827         hp = http_header_append(c, hp, "X-Forwarded-For", c->addr);
 828     }
 829
 830     requestbuf = http_serialize_request(rq);
 831
 832     http_buf_enqueue(&p->oqueue, requestbuf);
 833     iochan_setflag(p->iochan, EVENT_OUTPUT);
 834     return 0;
 835 }
 836
 837 void http_send_response(struct http_channel *ch)
 838 {
 839     struct http_response *rs = ch->response;
 840     struct http_buf *hb;
 841
 842     yaz_timing_stop(ch->yt);
 843     yaz_log(YLOG_LOG, "Response: %6.5f %d %s%s%s ",
 844             yaz_timing_get_real(ch->yt),
 845             iochan_getfd(ch->iochan),
 846             ch->request->path,
 847             *ch->request->search ? "?" : "",
 848             ch->request->search);
 849
 850     assert(rs);
 851     hb = http_serialize_response(ch, rs);
 852     if (!hb)
 853     {
 854         yaz_log(YLOG_WARN, "Failed to serialize HTTP response");
 855         http_channel_destroy(ch->iochan);
 856     }
 857     else
 858     {
 859         http_buf_enqueue(&ch->oqueue, hb);
 860         iochan_setflag(ch->iochan, EVENT_OUTPUT);
 861         ch->state = Http_Idle;
 862     }
 863 }
 864
 865 static void http_error(struct http_channel *hc, int no, const char *msg)
 866 {
 867     struct http_response *rs = http_create_response(hc);
 868
 869     hc->response = rs;
 870     hc->keep_alive = 0;  // not keeping this HTTP session alive
 871
 872     sprintf(rs->code, "%d", no);
 873
 874     rs->msg = nmem_strdup(hc->nmem, msg);
 875     rs->payload = nmem_malloc(hc->nmem, 100);
 876     yaz_snprintf(rs->payload, 99, "<error>HTTP Error %d: %s</error>\n",
 877                  no, msg);
 878     http_send_response(hc);
 879 }
 880
 881 static void http_io(IOCHAN i, int event)
 882 {
 883     struct http_channel *hc = iochan_getdata(i);
 884     while (event)
 885     {
 886         if (event == EVENT_INPUT)
 887         {
 888             int res, reqlen;
 889             struct http_buf *htbuf;
 890
 891             htbuf = http_buf_create(hc->http_server);
 892             res = recv(iochan_getfd(i), htbuf->buf, HTTP_BUF_SIZE -1, 0);
 893             if (res == -1 && errno == EAGAIN)
 894             {
 895                 http_buf_destroy(hc->http_server, htbuf);
 896                 return;
 897             }
 898             if (res <= 0)
 899             {
 900 #if HAVE_SYS_TIME_H
 901                 if (hc->http_server->record_file)
 902                 {
 903                     struct timeval tv;
 904                     gettimeofday(&tv, 0);
 905                     fprintf(hc->http_server->record_file, "r %lld %lld %lld 0\n",
 906                             (long long) tv.tv_sec, (long long) tv.tv_usec,
 907                             (long long) iochan_getfd(i));
 908                 }
 909 #endif
 910                 http_buf_destroy(hc->http_server, htbuf);
 911                 fflush(hc->http_server->record_file);
 912                 http_channel_destroy(i);
 913                 return;
 914             }
 915             htbuf->buf[res] = '\0';
 916             htbuf->len = res;
 917             http_buf_enqueue(&hc->iqueue, htbuf);
 918
 919             while (1)
 920             {
 921                 if (hc->state == Http_Busy)
 922                     return;
 923                 reqlen = request_check(hc->iqueue);
 924                 if (reqlen <= 2)
 925                     return;
 926                 // we have a complete HTTP request
 927                 nmem_reset(hc->nmem);
 928 #if HAVE_SYS_TIME_H
 929                 if (hc->http_server->record_file)
 930                 {
 931                     struct timeval tv;
 932                     int sz = 0;
 933                     struct http_buf *hb;
 934                     for (hb = hc->iqueue; hb; hb = hb->next)
 935                         sz += hb->len;
 936                     gettimeofday(&tv, 0);
 937                     fprintf(hc->http_server->record_file, "r %lld %lld %lld %d\n",
 938                             (long long) tv.tv_sec, (long long) tv.tv_usec,
 939                             (long long) iochan_getfd(i), sz);
 940                     for (hb = hc->iqueue; hb; hb = hb->next)
 941                         fwrite(hb->buf, 1, hb->len, hc->http_server->record_file);
 942                     fflush(hc->http_server->record_file);
 943                 }
 944  #endif
 945                 yaz_timing_start(hc->yt);
 946                 if (!(hc->request = http_parse_request(hc, &hc->iqueue, reqlen)))
 947                 {
 948                     yaz_log(YLOG_WARN, "Failed to parse request");
 949                     http_error(hc, 400, "Bad Request");
 950                     return;
 951                 }
 952                 hc->response = 0;
 953                 yaz_log(YLOG_LOG, "Request: - %d %s %s%s%s",
 954                         iochan_getfd(i),
 955                         hc->request->method,
 956                         hc->request->path,
 957                         *hc->request->search ? "?" : "",
 958                         hc->request->search);
 959                 if (hc->request->content_buf)
 960                     yaz_log(YLOG_LOG, "%s", hc->request->content_buf);
 961                 if (http_weshouldproxy(hc->request))
 962                     http_proxy(hc->request);
 963                 else
 964                 {
 965                     // Execute our business logic!
 966                     hc->state = Http_Busy;
 967                     http_command(hc);
 968                 }
 969             }
 970         }
 971         else if (event == EVENT_OUTPUT)
 972         {
 973             event = 0;
 974             if (hc->oqueue)
 975             {
 976                 struct http_buf *wb = hc->oqueue;
 977                 int res;
 978                 res = send(iochan_getfd(hc->iochan),
 979                            wb->buf + wb->offset, wb->len, 0);
 980                 if (res <= 0)
 981                 {
 982                     yaz_log(YLOG_WARN|YLOG_ERRNO, "write");
 983                     http_channel_destroy(i);
 984                     return;
 985                 }
 986                 if (res == wb->len)
 987                 {
 988 #if HAVE_SYS_TIME_H
 989                     if (hc->http_server->record_file)
 990                     {
 991                         struct timeval tv;
 992                         int sz = wb->offset + wb->len;
 993                         gettimeofday(&tv, 0);
 994                         fprintf(hc->http_server->record_file, "w %lld %lld %lld %d\n",
 995                                 (long long) tv.tv_sec, (long long) tv.tv_usec,
 996                                 (long long) iochan_getfd(i), sz);
 997                         fwrite(wb->buf, 1, wb->offset + wb->len,
 998                                hc->http_server->record_file);
 999                         fputc('\n', hc->http_server->record_file);
1000                         fflush(hc->http_server->record_file);
1001                     }
1002  #endif
1003                     hc->oqueue = hc->oqueue->next;
1004                     http_buf_destroy(hc->http_server, wb);
1005                 }
1006                 else
1007                 {
1008                     wb->len -= res;
1009                     wb->offset += res;
1010                 }
1011                 if (!hc->oqueue)
1012                 {
1013                     if (!hc->keep_alive)
1014                     {
1015                         http_channel_destroy(i);
1016                         return;
1017                     }
1018                     else
1019                     {
1020                         iochan_clearflag(i, EVENT_OUTPUT);
1021                         if (hc->iqueue)
1022                             event = EVENT_INPUT;
1023                     }
1024                 }
1025             }
1026             if (!hc->oqueue && hc->proxy && !hc->proxy->iochan)
1027                 http_channel_destroy(i); // Server closed; we're done
1028         }
1029         else
1030         {
1031             yaz_log(YLOG_WARN, "Unexpected event on connection");
1032             http_channel_destroy(i);
1033             event = 0;
1034         }
1035     }
1036 }
1037
1038 // Handles I/O on a client connection to a backend web server (proxy mode)
1039 static void proxy_io(IOCHAN pi, int event)
1040 {
1041     struct http_proxy *pc = iochan_getdata(pi);
1042     struct http_channel *hc = pc->channel;
1043
1044     switch (event)
1045     {
1046         int res;
1047         struct http_buf *htbuf;
1048
1049         case EVENT_INPUT:
1050             htbuf = http_buf_create(hc->http_server);
1051             res = recv(iochan_getfd(pi), htbuf->buf, HTTP_BUF_SIZE -1, 0);
1052             if (res == 0 || (res < 0 && !is_inprogress()))
1053             {
1054                 if (hc->oqueue)
1055                 {
1056                     yaz_log(YLOG_WARN, "Proxy read came up short");
1057                     // Close channel and alert client HTTP channel that we're gone
1058                     http_buf_destroy(hc->http_server, htbuf);
1059                     CLOSESOCKET(iochan_getfd(pi));
1060                     iochan_destroy(pi);
1061                     pc->iochan = 0;
1062                 }
1063                 else
1064                 {
1065                     http_channel_destroy(hc->iochan);
1066                     return;
1067                 }
1068             }
1069             else
1070             {
1071                 htbuf->buf[res] = '\0';
1072                 htbuf->offset = 0;
1073                 htbuf->len = res;
1074                 // Write any remaining payload
1075                 if (htbuf->len - htbuf->offset > 0)
1076                     http_buf_enqueue(&hc->oqueue, htbuf);
1077             }
1078             iochan_setflag(hc->iochan, EVENT_OUTPUT);
1079             break;
1080         case EVENT_OUTPUT:
1081             if (!(htbuf = pc->oqueue))
1082             {
1083                 iochan_clearflag(pi, EVENT_OUTPUT);
1084                 return;
1085             }
1086             res = send(iochan_getfd(pi), htbuf->buf + htbuf->offset, htbuf->len, 0);
1087             if (res <= 0)
1088             {
1089                 yaz_log(YLOG_WARN|YLOG_ERRNO, "write");
1090                 http_channel_destroy(hc->iochan);
1091                 return;
1092             }
1093             if (res == htbuf->len)
1094             {
1095                 struct http_buf *np = htbuf->next;
1096                 http_buf_destroy(hc->http_server, htbuf);
1097                 pc->oqueue = np;
1098             }
1099             else
1100             {
1101                 htbuf->len -= res;
1102                 htbuf->offset += res;
1103             }
1104
1105             if (!pc->oqueue) {
1106                 iochan_setflags(pi, EVENT_INPUT); // Turns off output flag
1107             }
1108             break;
1109         default:
1110             yaz_log(YLOG_WARN, "Unexpected event on connection");
1111             http_channel_destroy(hc->iochan);
1112             break;
1113     }
1114 }
1115
1116 static void http_fire_observers(struct http_channel *c);
1117 static void http_destroy_observers(struct http_channel *c);
1118
1119 // Cleanup channel
1120 static void http_channel_destroy(IOCHAN i)
1121 {
1122     struct http_channel *s = iochan_getdata(i);
1123     http_server_t http_server;
1124
1125     if (s->proxy)
1126     {
1127         if (s->proxy->iochan)
1128         {
1129             CLOSESOCKET(iochan_getfd(s->proxy->iochan));
1130             iochan_destroy(s->proxy->iochan);
1131         }
1132         http_buf_destroy_queue(s->http_server, s->proxy->oqueue);
1133         xfree(s->proxy);
1134     }
1135     yaz_timing_destroy(&s->yt);
1136     http_buf_destroy_queue(s->http_server, s->iqueue);
1137     http_buf_destroy_queue(s->http_server, s->oqueue);
1138     http_fire_observers(s);
1139     http_destroy_observers(s);
1140
1141     http_server = s->http_server; /* save it for destroy (decref) */
1142
1143     http_server_destroy(http_server);
1144
1145     CLOSESOCKET(iochan_getfd(i));
1146
1147     iochan_destroy(i);
1148     nmem_destroy(s->nmem);
1149     wrbuf_destroy(s->wrbuf);
1150     xfree(s);
1151 }
1152
1153 static struct http_channel *http_channel_create(http_server_t hs,
1154                                                 const char *addr,
1155                                                 struct conf_server *server)
1156 {
1157     struct http_channel *r;
1158
1159     r = xmalloc(sizeof(struct http_channel));
1160     r->nmem = nmem_create();
1161     r->wrbuf = wrbuf_alloc();
1162
1163     http_server_incref(hs);
1164     r->http_server = hs;
1165     r->http_sessions = hs->http_sessions;
1166     assert(r->http_sessions);
1167     r->server = server;
1168     r->proxy = 0;
1169     r->iochan = 0;
1170     r->iqueue = r->oqueue = 0;
1171     r->state = Http_Idle;
1172     r->keep_alive = 0;
1173     r->request = 0;
1174     r->response = 0;
1175     strcpy(r->version, "1.0");
1176     if (!addr)
1177     {
1178         yaz_log(YLOG_WARN, "Invalid HTTP forward address");
1179         exit(1);
1180     }
1181     strcpy(r->addr, addr);
1182     r->observers = 0;
1183     r->yt = yaz_timing_create();
1184     return r;
1185 }
1186
1187
1188 /* Accept a new command connection */
1189 static void http_accept(IOCHAN i, int event)
1190 {
1191     char host[256];
1192     struct sockaddr_storage addr;
1193     int fd = iochan_getfd(i);
1194     socklen_t len = sizeof addr;
1195     int s;
1196     IOCHAN c;
1197     struct http_channel *ch;
1198     struct conf_server *server = iochan_getdata(i);
1199
1200     if ((s = accept(fd, (struct sockaddr *) &addr, &len)) < 0)
1201     {
1202         yaz_log(YLOG_WARN|YLOG_ERRNO, "accept");
1203         return;
1204     }
1205     if (getnameinfo((struct sockaddr *) &addr, len, host, sizeof(host)-1, 0, 0,
1206         NI_NUMERICHOST))
1207     {
1208         yaz_log(YLOG_WARN|YLOG_ERRNO, "getnameinfo");
1209         CLOSESOCKET(s);
1210         return;
1211     }
1212     enable_nonblock(s);
1213
1214     yaz_log(YLOG_DEBUG, "New command connection");
1215     c = iochan_create(s, http_io, EVENT_INPUT | EVENT_EXCEPT,
1216                       "http_session_socket");
1217
1218
1219     ch = http_channel_create(server->http_server, host, server);
1220     ch->iochan = c;
1221     iochan_setdata(c, ch);
1222     iochan_add(server->iochan_man, c);
1223 }
1224
1225 /* Create a http-channel listener, syntax [host:]port */
1226 int http_init(struct conf_server *server, const char *record_fname)
1227 {
1228     IOCHAN c;
1229     int s = -1;
1230     int one = 1;
1231     FILE *record_file = 0;
1232     struct addrinfo hints, *af = 0, *ai;
1233     int error;
1234     int ipv6_only = -1;
1235
1236     yaz_log(YLOG_LOG, "HTTP listener %s:%s", server->host, server->port);
1237
1238     hints.ai_flags = 0;
1239     hints.ai_family = AF_UNSPEC;
1240     hints.ai_socktype = SOCK_STREAM;
1241     hints.ai_protocol = 0;
1242     hints.ai_addrlen        = 0;
1243     hints.ai_addr           = NULL;
1244     hints.ai_canonname      = NULL;
1245     hints.ai_next           = NULL;
1246
1247     if (!strcmp(server->host, "@"))
1248     {
1249         ipv6_only = 0;
1250         hints.ai_flags = AI_PASSIVE;
1251         error = getaddrinfo(0, server->port, &hints, &af);
1252     }
1253     else
1254         error = getaddrinfo(server->host, server->port, &hints, &af);
1255
1256     if (error)
1257     {
1258         yaz_log(YLOG_FATAL, "Failed to resolve %s: %s", server->host,
1259                 gai_strerror(error));
1260         return 1;
1261     }
1262     for (ai = af; ai; ai = ai->ai_next)
1263     {
1264         if (ai->ai_family == AF_INET6)
1265         {
1266             s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1267             if (s != -1)
1268                 break;
1269         }
1270     }
1271     if (s == -1)
1272     {
1273         for (ai = af; ai; ai = ai->ai_next)
1274         {
1275             s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1276             if (s != -1)
1277                 break;
1278         }
1279     }
1280     if (s == -1)
1281     {
1282         yaz_log(YLOG_FATAL|YLOG_ERRNO, "socket");
1283         freeaddrinfo(af);
1284         return 1;
1285     }
1286     if (ipv6_only >= 0 && ai->ai_family == AF_INET6 &&
1287         setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &ipv6_only, sizeof(ipv6_only)))
1288     {
1289         yaz_log(YLOG_FATAL|YLOG_ERRNO, "setsockopt IPV6_V6ONLY %s:%s %d",
1290                 server->host, server->port, ipv6_only);
1291         freeaddrinfo(af);
1292         CLOSESOCKET(s);
1293         return 1;
1294     }
1295     if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
1296     {
1297         yaz_log(YLOG_FATAL|YLOG_ERRNO, "setsockopt SO_REUSEADDR %s:%s",
1298                 server->host, server->port);
1299         freeaddrinfo(af);
1300         CLOSESOCKET(s);
1301         return 1;
1302     }
1303     if (bind(s, ai->ai_addr, ai->ai_addrlen) < 0)
1304     {
1305         yaz_log(YLOG_FATAL|YLOG_ERRNO, "bind %s:%s",
1306                 server->host, server->port);
1307         freeaddrinfo(af);
1308         CLOSESOCKET(s);
1309         return 1;
1310     }
1311     freeaddrinfo(af);
1312     if (listen(s, SOMAXCONN) < 0)
1313     {
1314         yaz_log(YLOG_FATAL|YLOG_ERRNO, "listen %s:%s",
1315                 server->host, server->port);
1316         CLOSESOCKET(s);
1317         return 1;
1318     }
1319
1320     if (record_fname)
1321     {
1322         record_file = fopen(record_fname, "wb");
1323         if (!record_file)
1324         {
1325             yaz_log(YLOG_FATAL|YLOG_ERRNO, "fopen %s", record_fname);
1326             CLOSESOCKET(s);
1327             return 1;
1328         }
1329     }
1330     server->http_server = http_server_create();
1331
1332     server->http_server->record_file = record_file;
1333     server->http_server->listener_socket = s;
1334
1335     c = iochan_create(s, http_accept, EVENT_INPUT | EVENT_EXCEPT, "http_server");
1336     iochan_setdata(c, server);
1337
1338     iochan_add(server->iochan_man, c);
1339     return 0;
1340 }
1341
1342 void http_close_server(struct conf_server *server)
1343 {
1344     /* break the event_loop (select) by closing down the HTTP listener sock */
1345     if (server->http_server->listener_socket)
1346     {
1347 #ifdef WIN32
1348         closesocket(server->http_server->listener_socket);
1349 #else
1350         close(server->http_server->listener_socket);
1351 #endif
1352     }
1353 }
1354
1355 void http_set_proxyaddr(const char *host, struct conf_server *server)
1356 {
1357     const char *p;
1358     short port;
1359     struct hostent *he;
1360     WRBUF w = wrbuf_alloc();
1361
1362     yaz_log(YLOG_LOG, "HTTP backend  %s", host);
1363
1364     p = strchr(host, ':');
1365     if (p)
1366     {
1367         port = atoi(p + 1);
1368         wrbuf_write(w, host, p - host);
1369         wrbuf_puts(w, "");
1370     }
1371     else
1372     {
1373         port = 80;
1374         wrbuf_puts(w, host);
1375     }
1376     if (!(he = gethostbyname(wrbuf_cstr(w))))
1377     {
1378         fprintf(stderr, "Failed to lookup '%s'\n", wrbuf_cstr(w));
1379         exit(1);
1380     }
1381     wrbuf_destroy(w);
1382
1383     server->http_server->proxy_addr = xmalloc(sizeof(struct sockaddr_in));
1384     server->http_server->proxy_addr->sin_family = he->h_addrtype;
1385     memcpy(&server->http_server->proxy_addr->sin_addr.s_addr,
1386            he->h_addr_list[0], he->h_length);
1387     server->http_server->proxy_addr->sin_port = htons(port);
1388 }
1389
1390 static void http_fire_observers(struct http_channel *c)
1391 {
1392     http_channel_observer_t p = c->observers;
1393     while (p)
1394     {
1395         p->destroy(p->data, c, p->data2);
1396         p = p->next;
1397     }
1398 }
1399
1400 static void http_destroy_observers(struct http_channel *c)
1401 {
1402     while (c->observers)
1403     {
1404         http_channel_observer_t obs = c->observers;
1405         c->observers = obs->next;
1406         xfree(obs);
1407     }
1408 }
1409
1410 http_channel_observer_t http_add_observer(struct http_channel *c, void *data,
1411                                           http_channel_destroy_t des)
1412 {
1413     http_channel_observer_t obs = xmalloc(sizeof(*obs));
1414     obs->chan = c;
1415     obs->data = data;
1416     obs->data2 = 0;
1417     obs->destroy= des;
1418     obs->next = c->observers;
1419     c->observers = obs;
1420     return obs;
1421 }
1422
1423 void http_remove_observer(http_channel_observer_t obs)
1424 {
1425     struct http_channel *c = obs->chan;
1426     http_channel_observer_t found, *p = &c->observers;
1427     while (*p != obs)
1428         p = &(*p)->next;
1429     found = *p;
1430     assert(found);
1431     *p = (*p)->next;
1432     xfree(found);
1433 }
1434
1435 struct http_channel *http_channel_observer_chan(http_channel_observer_t obs)
1436 {
1437     return obs->chan;
1438 }
1439
1440 void http_observer_set_data2(http_channel_observer_t obs, void *data2)
1441 {
1442     obs->data2 = data2;
1443 }
1444
1445 http_server_t http_server_create(void)
1446 {
1447     http_server_t hs = xmalloc(sizeof(*hs));
1448     hs->mutex = 0;
1449     hs->proxy_addr = 0;
1450     hs->ref_count = 1;
1451     hs->http_sessions = 0;
1452
1453     hs->record_file = 0;
1454     return hs;
1455 }
1456
1457 void http_server_destroy(http_server_t hs)
1458 {
1459     if (hs)
1460     {
1461         int r;
1462
1463         yaz_mutex_enter(hs->mutex); /* OK: hs->mutex may be NULL */
1464         r = --(hs->ref_count);
1465         yaz_mutex_leave(hs->mutex);
1466
1467         if (r == 0)
1468         {
1469             http_sessions_destroy(hs->http_sessions);
1470             xfree(hs->proxy_addr);
1471             yaz_mutex_destroy(&hs->mutex);
1472             if (hs->record_file)
1473                 fclose(hs->record_file);
1474             xfree(hs);
1475         }
1476     }
1477 }
1478
1479 void http_server_incref(http_server_t hs)
1480 {
1481     assert(hs);
1482     yaz_mutex_enter(hs->mutex);
1483     (hs->ref_count)++;
1484     yaz_mutex_leave(hs->mutex);
1485 }
1486
1487 void http_mutex_init(struct conf_server *server)
1488 {
1489     assert(server);
1490
1491     assert(server->http_server->mutex == 0);
1492     pazpar2_mutex_create(&server->http_server->mutex, "http_server");
1493     server->http_server->http_sessions = http_sessions_create();
1494 }
1495
1496 /*
1497  * Local variables:
1498  * c-basic-offset: 4
1499  * c-file-style: "Stroustrup"
1500  * indent-tabs-mode: nil
1501  * End:
1502  * vim: shiftwidth=4 tabstop=8 expandtab
1503  */
1504