server/util_script.c

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "apr.h"
  18 #include "apr_lib.h"
  19 #include "apr_strings.h"
  20
  21 #define APR_WANT_STRFUNC
  22 #include "apr_want.h"
  23
  24 #if APR_HAVE_STDLIB_H
  25 #include <stdlib.h>
  26 #endif
  27
  28 #include "ap_config.h"
  29 #include "httpd.h"
  30 #include "http_config.h"
  31 #include "http_main.h"
  32 #include "http_log.h"
  33 #include "http_core.h"
  34 #include "http_protocol.h"
  35 #include "http_request.h"       /* for sub_req_lookup_uri() */
  36 #include "util_script.h"
  37 #include "apr_date.h"           /* For apr_date_parse_http() */
  38 #include "util_ebcdic.h"
  39
  40 #ifdef OS2
  41 #define INCL_DOS
  42 #include <os2.h>
  43 #endif
  44
  45 /*
  46  * Various utility functions which are common to a whole lot of
  47  * script-type extensions mechanisms, and might as well be gathered
  48  * in one place (if only to avoid creating inter-module dependancies
  49  * where there don't have to be).
  50  */
  51
  52 #define MALFORMED_MESSAGE "malformed header from script. Bad header="
  53 #define MALFORMED_HEADER_LENGTH_TO_SHOW 30
  54
  55 static char *http2env(apr_pool_t *a, const char *w)
  56 {
  57     char *res = (char *)apr_palloc(a, sizeof("HTTP_") + strlen(w));
  58     char *cp = res;
  59     char c;
  60
  61     *cp++ = 'H';
  62     *cp++ = 'T';
  63     *cp++ = 'T';
  64     *cp++ = 'P';
  65     *cp++ = '_';
  66
  67     while ((c = *w++) != 0) {
  68         if (!apr_isalnum(c)) {
  69             *cp++ = '_';
  70         }
  71         else {
  72             *cp++ = apr_toupper(c);
  73         }
  74     }
  75     *cp = 0;
  76
  77     return res;
  78 }
  79
  80 AP_DECLARE(char **) ap_create_environment(apr_pool_t *p, apr_table_t *t)
  81 {
  82     const apr_array_header_t *env_arr = apr_table_elts(t);
  83     const apr_table_entry_t *elts = (const apr_table_entry_t *) env_arr->elts;
  84     char **env = (char **) apr_palloc(p, (env_arr->nelts + 2) * sizeof(char *));
  85     int i, j;
  86     char *tz;
  87     char *whack;
  88
  89     j = 0;
  90     if (!apr_table_get(t, "TZ")) {
  91         tz = getenv("TZ");
  92         if (tz != NULL) {
  93             env[j++] = apr_pstrcat(p, "TZ=", tz, NULL);
  94         }
  95     }
  96     for (i = 0; i < env_arr->nelts; ++i) {
  97         if (!elts[i].key) {
  98             continue;
  99         }
 100         env[j] = apr_pstrcat(p, elts[i].key, "=", elts[i].val, NULL);
 101         whack = env[j];
 102         if (apr_isdigit(*whack)) {
 103             *whack++ = '_';
 104         }
 105         while (*whack != '=') {
 106             if (!apr_isalnum(*whack) && *whack != '_') {
 107                 *whack = '_';
 108             }
 109             ++whack;
 110         }
 111         ++j;
 112     }
 113
 114     env[j] = NULL;
 115     return env;
 116 }
 117
 118 AP_DECLARE(void) ap_add_common_vars(request_rec *r)
 119 {
 120     apr_table_t *e;
 121     server_rec *s = r->server;
 122     conn_rec *c = r->connection;
 123     const char *rem_logname;
 124     char *env_path;
 125 #if defined(WIN32) || defined(OS2) || defined(BEOS)
 126     char *env_temp;
 127 #endif
 128     const char *host;
 129     const apr_array_header_t *hdrs_arr = apr_table_elts(r->headers_in);
 130     const apr_table_entry_t *hdrs = (const apr_table_entry_t *) hdrs_arr->elts;
 131     int i;
 132     apr_port_t rport;
 133
 134     /* use a temporary apr_table_t which we'll overlap onto
 135      * r->subprocess_env later
 136      * (exception: if r->subprocess_env is empty at the start,
 137      * write directly into it)
 138      */
 139     if (apr_is_empty_table(r->subprocess_env)) {
 140         e = r->subprocess_env;
 141     }
 142     else {
 143         e = apr_table_make(r->pool, 25 + hdrs_arr->nelts);
 144     }
 145
 146     /* First, add environment vars from headers... this is as per
 147      * CGI specs, though other sorts of scripting interfaces see
 148      * the same vars...
 149      */
 150
 151     for (i = 0; i < hdrs_arr->nelts; ++i) {
 152         if (!hdrs[i].key) {
 153             continue;
 154         }
 155
 156         /* A few headers are special cased --- Authorization to prevent
 157          * rogue scripts from capturing passwords; content-type and -length
 158          * for no particular reason.
 159          */
 160
 161         if (!strcasecmp(hdrs[i].key, "Content-type")) {
 162             apr_table_addn(e, "CONTENT_TYPE", hdrs[i].val);
 163         }
 164         else if (!strcasecmp(hdrs[i].key, "Content-length")) {
 165             apr_table_addn(e, "CONTENT_LENGTH", hdrs[i].val);
 166         }
 167         /*
 168          * You really don't want to disable this check, since it leaves you
 169          * wide open to CGIs stealing passwords and people viewing them
 170          * in the environment with "ps -e".  But, if you must...
 171          */
 172 #ifndef SECURITY_HOLE_PASS_AUTHORIZATION
 173         else if (!strcasecmp(hdrs[i].key, "Authorization")
 174                  || !strcasecmp(hdrs[i].key, "Proxy-Authorization")) {
 175             continue;
 176         }
 177 #endif
 178         else {
 179             apr_table_addn(e, http2env(r->pool, hdrs[i].key), hdrs[i].val);
 180         }
 181     }
 182
 183     if (!(env_path = getenv("PATH"))) {
 184         env_path = DEFAULT_PATH;
 185     }
 186     apr_table_addn(e, "PATH", apr_pstrdup(r->pool, env_path));
 187
 188 #ifdef WIN32
 189     if (env_temp = getenv("SystemRoot")) {
 190         apr_table_addn(e, "SystemRoot", env_temp);
 191     }
 192     if (env_temp = getenv("COMSPEC")) {
 193         apr_table_addn(e, "COMSPEC", env_temp);
 194     }
 195     if (env_temp = getenv("PATHEXT")) {
 196         apr_table_addn(e, "PATHEXT", env_temp);
 197     }
 198     if (env_temp = getenv("WINDIR")) {
 199         apr_table_addn(e, "WINDIR", env_temp);
 200     }
 201 #endif
 202
 203 #ifdef OS2
 204     if ((env_temp = getenv("COMSPEC")) != NULL) {
 205         apr_table_addn(e, "COMSPEC", env_temp);
 206     }
 207     if ((env_temp = getenv("ETC")) != NULL) {
 208         apr_table_addn(e, "ETC", env_temp);
 209     }
 210     if ((env_temp = getenv("DPATH")) != NULL) {
 211         apr_table_addn(e, "DPATH", env_temp);
 212     }
 213     if ((env_temp = getenv("PERLLIB_PREFIX")) != NULL) {
 214         apr_table_addn(e, "PERLLIB_PREFIX", env_temp);
 215     }
 216 #endif
 217
 218 #ifdef BEOS
 219     if ((env_temp = getenv("LIBRARY_PATH")) != NULL) {
 220         apr_table_addn(e, "LIBRARY_PATH", env_temp);
 221     }
 222 #endif
 223
 224     apr_table_addn(e, "SERVER_SIGNATURE", ap_psignature("", r));
 225     apr_table_addn(e, "SERVER_SOFTWARE", ap_get_server_banner());
 226     apr_table_addn(e, "SERVER_NAME",
 227                    ap_escape_html(r->pool, ap_get_server_name(r)));
 228     apr_table_addn(e, "SERVER_ADDR", r->connection->local_ip);  /* Apache */
 229     apr_table_addn(e, "SERVER_PORT",
 230                   apr_psprintf(r->pool, "%u", ap_get_server_port(r)));
 231     host = ap_get_remote_host(c, r->per_dir_config, REMOTE_HOST, NULL);
 232     if (host) {
 233         apr_table_addn(e, "REMOTE_HOST", host);
 234     }
 235     apr_table_addn(e, "REMOTE_ADDR", c->remote_ip);
 236     apr_table_addn(e, "DOCUMENT_ROOT", ap_document_root(r));    /* Apache */
 237     apr_table_addn(e, "SERVER_ADMIN", s->server_admin); /* Apache */
 238     apr_table_addn(e, "SCRIPT_FILENAME", r->filename);  /* Apache */
 239
 240     rport = c->remote_addr->port;
 241     apr_table_addn(e, "REMOTE_PORT", apr_itoa(r->pool, rport));
 242
 243     if (r->user) {
 244         apr_table_addn(e, "REMOTE_USER", r->user);
 245     }
 246     else if (r->prev) {
 247         request_rec *back = r->prev;
 248
 249         while (back) {
 250             if (back->user) {
 251                 apr_table_addn(e, "REDIRECT_REMOTE_USER", back->user);
 252                 break;
 253             }
 254             back = back->prev;
 255         }
 256     }
 257     if (r->ap_auth_type) {
 258         apr_table_addn(e, "AUTH_TYPE", r->ap_auth_type);
 259     }
 260     rem_logname = ap_get_remote_logname(r);
 261     if (rem_logname) {
 262         apr_table_addn(e, "REMOTE_IDENT", apr_pstrdup(r->pool, rem_logname));
 263     }
 264
 265     /* Apache custom error responses. If we have redirected set two new vars */
 266
 267     if (r->prev) {
 268         if (r->prev->args) {
 269             apr_table_addn(e, "REDIRECT_QUERY_STRING", r->prev->args);
 270         }
 271         if (r->prev->uri) {
 272             apr_table_addn(e, "REDIRECT_URL", r->prev->uri);
 273         }
 274     }
 275
 276     if (e != r->subprocess_env) {
 277       apr_table_overlap(r->subprocess_env, e, APR_OVERLAP_TABLES_SET);
 278     }
 279 }
 280
 281 /* This "cute" little function comes about because the path info on
 282  * filenames and URLs aren't always the same. So we take the two,
 283  * and find as much of the two that match as possible.
 284  */
 285
 286 AP_DECLARE(int) ap_find_path_info(const char *uri, const char *path_info)
 287 {
 288     int lu = strlen(uri);
 289     int lp = strlen(path_info);
 290
 291     while (lu-- && lp-- && uri[lu] == path_info[lp]) {
 292         if (path_info[lp] == '/') {
 293             while (lu && uri[lu-1] == '/') lu--;
 294         }
 295     }
 296
 297     if (lu == -1) {
 298         lu = 0;
 299     }
 300
 301     while (uri[lu] != '\0' && uri[lu] != '/') {
 302         lu++;
 303     }
 304     return lu;
 305 }
 306
 307 /* Obtain the Request-URI from the original request-line, returning
 308  * a new string from the request pool containing the URI or "".
 309  */
 310 static char *original_uri(request_rec *r)
 311 {
 312     char *first, *last;
 313
 314     if (r->the_request == NULL) {
 315         return (char *) apr_pcalloc(r->pool, 1);
 316     }
 317
 318     first = r->the_request;     /* use the request-line */
 319
 320     while (*first && !apr_isspace(*first)) {
 321         ++first;                /* skip over the method */
 322     }
 323     while (apr_isspace(*first)) {
 324         ++first;                /*   and the space(s)   */
 325     }
 326
 327     last = first;
 328     while (*last && !apr_isspace(*last)) {
 329         ++last;                 /* end at next whitespace */
 330     }
 331
 332     return apr_pstrmemdup(r->pool, first, last - first);
 333 }
 334
 335 AP_DECLARE(void) ap_add_cgi_vars(request_rec *r)
 336 {
 337     apr_table_t *e = r->subprocess_env;
 338
 339     apr_table_setn(e, "GATEWAY_INTERFACE", "CGI/1.1");
 340     apr_table_setn(e, "SERVER_PROTOCOL", r->protocol);
 341     apr_table_setn(e, "REQUEST_METHOD", r->method);
 342     apr_table_setn(e, "QUERY_STRING", r->args ? r->args : "");
 343     apr_table_setn(e, "REQUEST_URI", original_uri(r));
 344
 345     /* Note that the code below special-cases scripts run from includes,
 346      * because it "knows" that the sub_request has been hacked to have the
 347      * args and path_info of the original request, and not any that may have
 348      * come with the script URI in the include command.  Ugh.
 349      */
 350
 351     if (!strcmp(r->protocol, "INCLUDED")) {
 352         apr_table_setn(e, "SCRIPT_NAME", r->uri);
 353         if (r->path_info && *r->path_info) {
 354             apr_table_setn(e, "PATH_INFO", r->path_info);
 355         }
 356     }
 357     else if (!r->path_info || !*r->path_info) {
 358         apr_table_setn(e, "SCRIPT_NAME", r->uri);
 359     }
 360     else {
 361         int path_info_start = ap_find_path_info(r->uri, r->path_info);
 362
 363         apr_table_setn(e, "SCRIPT_NAME",
 364                       apr_pstrndup(r->pool, r->uri, path_info_start));
 365
 366         apr_table_setn(e, "PATH_INFO", r->path_info);
 367     }
 368
 369     if (r->path_info && r->path_info[0]) {
 370         /*
 371          * To get PATH_TRANSLATED, treat PATH_INFO as a URI path.
 372          * Need to re-escape it for this, since the entire URI was
 373          * un-escaped before we determined where the PATH_INFO began.
 374          */
 375         request_rec *pa_req;
 376
 377         pa_req = ap_sub_req_lookup_uri(ap_escape_uri(r->pool, r->path_info), r,
 378                                        NULL);
 379
 380         if (pa_req->filename) {
 381             char *pt = apr_pstrcat(r->pool, pa_req->filename, pa_req->path_info,
 382                                   NULL);
 383 #ifdef WIN32
 384             /* We need to make this a real Windows path name */
 385             apr_filepath_merge(&pt, "", pt, APR_FILEPATH_NATIVE, r->pool);
 386 #endif
 387             apr_table_setn(e, "PATH_TRANSLATED", pt);
 388         }
 389         ap_destroy_sub_req(pa_req);
 390     }
 391 }
 392
 393
 394 static int set_cookie_doo_doo(void *v, const char *key, const char *val)
 395 {
 396     apr_table_addn(v, key, val);
 397     return 1;
 398 }
 399
 400 #define HTTP_UNSET (-HTTP_OK)
 401
 402 AP_DECLARE(int) ap_scan_script_header_err_core(request_rec *r, char *buffer,
 403                                        int (*getsfunc) (char *, int, void *),
 404                                        void *getsfunc_data)
 405 {
 406     char x[MAX_STRING_LEN];
 407     char *w, *l;
 408     int p;
 409     int cgi_status = HTTP_UNSET;
 410     apr_table_t *merge;
 411     apr_table_t *cookie_table;
 412
 413     if (buffer) {
 414         *buffer = '\0';
 415     }
 416     w = buffer ? buffer : x;
 417
 418     /* temporary place to hold headers to merge in later */
 419     merge = apr_table_make(r->pool, 10);
 420
 421     /* The HTTP specification says that it is legal to merge duplicate
 422      * headers into one.  Some browsers that support Cookies don't like
 423      * merged headers and prefer that each Set-Cookie header is sent
 424      * separately.  Lets humour those browsers by not merging.
 425      * Oh what a pain it is.
 426      */
 427     cookie_table = apr_table_make(r->pool, 2);
 428     apr_table_do(set_cookie_doo_doo, cookie_table, r->err_headers_out, "Set-Cookie", NULL);
 429
 430     while (1) {
 431
 432         int rv = (*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data);
 433         if (rv == 0) {
 434             ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,
 435                           "Premature end of script headers: %s",
 436                           apr_filepath_name_get(r->filename));
 437             return HTTP_INTERNAL_SERVER_ERROR;
 438         }
 439         else if (rv == -1) {
 440             ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,
 441                           "Script timed out before returning headers: %s",
 442                           apr_filepath_name_get(r->filename));
 443             return HTTP_GATEWAY_TIME_OUT;
 444         }
 445
 446         /* Delete terminal (CR?)LF */
 447
 448         p = strlen(w);
 449              /* Indeed, the host's '\n':
 450                 '\012' for UNIX; '\015' for MacOS; '\025' for OS/390
 451                  -- whatever the script generates.
 452              */
 453         if (p > 0 && w[p - 1] == '\n') {
 454             if (p > 1 && w[p - 2] == CR) {
 455                 w[p - 2] = '\0';
 456             }
 457             else {
 458                 w[p - 1] = '\0';
 459             }
 460         }
 461
 462         /*
 463          * If we've finished reading the headers, check to make sure any
 464          * HTTP/1.1 conditions are met.  If so, we're done; normal processing
 465          * will handle the script's output.  If not, just return the error.
 466          * The appropriate thing to do would be to send the script process a
 467          * SIGPIPE to let it know we're ignoring it, close the channel to the
 468          * script process, and *then* return the failed-to-meet-condition
 469          * error.  Otherwise we'd be waiting for the script to finish
 470          * blithering before telling the client the output was no good.
 471          * However, we don't have the information to do that, so we have to
 472          * leave it to an upper layer.
 473          */
 474         if (w[0] == '\0') {
 475             int cond_status = OK;
 476
 477             /* PR#38070: This fails because it gets confused when a
 478              * CGI Status header overrides ap_meets_conditions.
 479              *
 480              * We can fix that by dropping ap_meets_conditions when
 481              * Status has been set.  Since this is the only place
 482              * cgi_status gets used, let's test it explicitly.
 483              *
 484              * The alternative would be to ignore CGI Status when
 485              * ap_meets_conditions returns anything interesting.
 486              * That would be safer wrt HTTP, but would break CGI.
 487              */
 488             if ((cgi_status == HTTP_UNSET) && (r->method_number == M_GET)) {
 489                 cond_status = ap_meets_conditions(r);
 490             }
 491             apr_table_overlap(r->err_headers_out, merge,
 492                 APR_OVERLAP_TABLES_MERGE);
 493             if (!apr_is_empty_table(cookie_table)) {
 494                 /* the cookies have already been copied to the cookie_table */
 495                 apr_table_unset(r->err_headers_out, "Set-Cookie");
 496                 r->err_headers_out = apr_table_overlay(r->pool,
 497                     r->err_headers_out, cookie_table);
 498             }
 499             return cond_status;
 500         }
 501
 502         /* if we see a bogus header don't ignore it. Shout and scream */
 503
 504 #if APR_CHARSET_EBCDIC
 505             /* Chances are that we received an ASCII header text instead of
 506              * the expected EBCDIC header lines. Try to auto-detect:
 507              */
 508         if (!(l = strchr(w, ':'))) {
 509             int maybeASCII = 0, maybeEBCDIC = 0;
 510             unsigned char *cp, native;
 511             apr_size_t inbytes_left, outbytes_left;
 512
 513             for (cp = w; *cp != '\0'; ++cp) {
 514                 native = apr_xlate_conv_byte(ap_hdrs_from_ascii, *cp);
 515                 if (apr_isprint(*cp) && !apr_isprint(native))
 516                     ++maybeEBCDIC;
 517                 if (!apr_isprint(*cp) && apr_isprint(native))
 518                     ++maybeASCII;
 519             }
 520             if (maybeASCII > maybeEBCDIC) {
 521                 ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
 522                              "CGI Interface Error: Script headers apparently ASCII: (CGI = %s)",
 523                              r->filename);
 524                 inbytes_left = outbytes_left = cp - w;
 525                 apr_xlate_conv_buffer(ap_hdrs_from_ascii,
 526                                       w, &inbytes_left, w, &outbytes_left);
 527             }
 528         }
 529 #endif /*APR_CHARSET_EBCDIC*/
 530         if (!(l = strchr(w, ':'))) {
 531             char malformed[(sizeof MALFORMED_MESSAGE) + 1
 532                            + MALFORMED_HEADER_LENGTH_TO_SHOW];
 533
 534             strcpy(malformed, MALFORMED_MESSAGE);
 535             strncat(malformed, w, MALFORMED_HEADER_LENGTH_TO_SHOW);
 536
 537             if (!buffer) {
 538                 /* Soak up all the script output - may save an outright kill */
 539                 while ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data)) {
 540                     continue;
 541                 }
 542             }
 543
 544             ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, 0, r,
 545                           "%s: %s", malformed,
 546                           apr_filepath_name_get(r->filename));
 547             return HTTP_INTERNAL_SERVER_ERROR;
 548         }
 549
 550         *l++ = '\0';
 551         while (*l && apr_isspace(*l)) {
 552             ++l;
 553         }
 554
 555         if (!strcasecmp(w, "Content-type")) {
 556             char *tmp;
 557
 558             /* Nuke trailing whitespace */
 559
 560             char *endp = l + strlen(l) - 1;
 561             while (endp > l && apr_isspace(*endp)) {
 562                 *endp-- = '\0';
 563             }
 564
 565             tmp = apr_pstrdup(r->pool, l);
 566             ap_content_type_tolower(tmp);
 567             ap_set_content_type(r, tmp);
 568         }
 569         /*
 570          * If the script returned a specific status, that's what
 571          * we'll use - otherwise we assume 200 OK.
 572          */
 573         else if (!strcasecmp(w, "Status")) {
 574             r->status = cgi_status = atoi(l);
 575             r->status_line = apr_pstrdup(r->pool, l);
 576         }
 577         else if (!strcasecmp(w, "Location")) {
 578             apr_table_set(r->headers_out, w, l);
 579         }
 580         else if (!strcasecmp(w, "Content-Length")) {
 581             apr_table_set(r->headers_out, w, l);
 582         }
 583         else if (!strcasecmp(w, "Content-Range")) {
 584             apr_table_set(r->headers_out, w, l);
 585         }
 586         else if (!strcasecmp(w, "Transfer-Encoding")) {
 587             apr_table_set(r->headers_out, w, l);
 588         }
 589         else if (!strcasecmp(w, "ETag")) {
 590             apr_table_set(r->headers_out, w, l);
 591         }
 592         /*
 593          * If the script gave us a Last-Modified header, we can't just
 594          * pass it on blindly because of restrictions on future values.
 595          */
 596         else if (!strcasecmp(w, "Last-Modified")) {
 597             ap_update_mtime(r, apr_date_parse_http(l));
 598             ap_set_last_modified(r);
 599         }
 600         else if (!strcasecmp(w, "Set-Cookie")) {
 601             apr_table_add(cookie_table, w, l);
 602         }
 603         else {
 604             apr_table_add(merge, w, l);
 605         }
 606     }
 607
 608     return OK;
 609 }
 610
 611 static int getsfunc_FILE(char *buf, int len, void *f)
 612 {
 613     return apr_file_gets(buf, len, (apr_file_t *) f) == APR_SUCCESS;
 614 }
 615
 616 AP_DECLARE(int) ap_scan_script_header_err(request_rec *r, apr_file_t *f,
 617                                           char *buffer)
 618 {
 619     return ap_scan_script_header_err_core(r, buffer, getsfunc_FILE, f);
 620 }
 621
 622 static int getsfunc_BRIGADE(char *buf, int len, void *arg)
 623 {
 624     apr_bucket_brigade *bb = (apr_bucket_brigade *)arg;
 625     const char *dst_end = buf + len - 1; /* leave room for terminating null */
 626     char *dst = buf;
 627     apr_bucket *e = APR_BRIGADE_FIRST(bb);
 628     apr_status_t rv;
 629     int done = 0;
 630
 631     while ((dst < dst_end) && !done && !APR_BUCKET_IS_EOS(e)) {
 632         const char *bucket_data;
 633         apr_size_t bucket_data_len;
 634         const char *src;
 635         const char *src_end;
 636         apr_bucket * next;
 637
 638         rv = apr_bucket_read(e, &bucket_data, &bucket_data_len,
 639                              APR_BLOCK_READ);
 640         if (rv != APR_SUCCESS || (bucket_data_len == 0)) {
 641             return APR_STATUS_IS_TIMEUP(rv) ? -1 : 0;
 642         }
 643         src = bucket_data;
 644         src_end = bucket_data + bucket_data_len;
 645         while ((src < src_end) && (dst < dst_end) && !done) {
 646             if (*src == '\n') {
 647                 done = 1;
 648             }
 649             else if (*src != '\r') {
 650                 *dst++ = *src;
 651             }
 652             src++;
 653         }
 654
 655         if (src < src_end) {
 656             apr_bucket_split(e, src - bucket_data);
 657         }
 658         next = APR_BUCKET_NEXT(e);
 659         APR_BUCKET_REMOVE(e);
 660         apr_bucket_destroy(e);
 661         e = next;
 662     }
 663     *dst = 0;
 664     return 1;
 665 }
 666
 667 AP_DECLARE(int) ap_scan_script_header_err_brigade(request_rec *r,
 668                                                   apr_bucket_brigade *bb,
 669                                                   char *buffer)
 670 {
 671     return ap_scan_script_header_err_core(r, buffer, getsfunc_BRIGADE, bb);
 672 }
 673
 674 struct vastrs {
 675     va_list args;
 676     int arg;
 677     const char *curpos;
 678 };
 679
 680 static int getsfunc_STRING(char *w, int len, void *pvastrs)
 681 {
 682     struct vastrs *strs = (struct vastrs*) pvastrs;
 683     const char *p;
 684     int t;
 685
 686     if (!strs->curpos || !*strs->curpos)
 687         return 0;
 688     p = ap_strchr_c(strs->curpos, '\n');
 689     if (p)
 690         ++p;
 691     else
 692         p = ap_strchr_c(strs->curpos, '\0');
 693     t = p - strs->curpos;
 694     if (t > len)
 695         t = len;
 696     strncpy (w, strs->curpos, t);
 697     w[t] = '\0';
 698     if (!strs->curpos[t]) {
 699         ++strs->arg;
 700         strs->curpos = va_arg(strs->args, const char *);
 701     }
 702     else
 703         strs->curpos += t;
 704     return t;
 705 }
 706
 707 /* ap_scan_script_header_err_strs() accepts additional const char* args...
 708  * each is treated as one or more header lines, and the first non-header
 709  * character is returned to **arg, **data.  (The first optional arg is
 710  * counted as 0.)
 711  */
 712 AP_DECLARE_NONSTD(int) ap_scan_script_header_err_strs(request_rec *r,
 713                                                       char *buffer,
 714                                                       const char **termch,
 715                                                       int *termarg, ...)
 716 {
 717     struct vastrs strs;
 718     int res;
 719
 720     va_start(strs.args, termarg);
 721     strs.arg = 0;
 722     strs.curpos = va_arg(strs.args, char*);
 723     res = ap_scan_script_header_err_core(r, buffer, getsfunc_STRING, (void *) &strs);
 724     if (termch)
 725         *termch = strs.curpos;
 726     if (termarg)
 727         *termarg = strs.arg;
 728     va_end(strs.args);
 729     return res;
 730 }
 731
 732
 733 static void
 734 argstr_to_table(char *str, apr_table_t *parms)
 735 {
 736     char *key;
 737     char *value;
 738     char *strtok_state;
 739
 740     if (str == NULL) {
 741         return;
 742     }
 743
 744     key = apr_strtok(str, "&", &strtok_state);
 745     while (key) {
 746         value = strchr(key, '=');
 747         if (value) {
 748             *value = '\0';      /* Split the string in two */
 749             value++;            /* Skip passed the = */
 750         }
 751         else {
 752             value = "1";
 753         }
 754         ap_unescape_url(key);
 755         ap_unescape_url(value);
 756         apr_table_set(parms, key, value);
 757         key = apr_strtok(NULL, "&", &strtok_state);
 758     }
 759 }
 760
 761 AP_DECLARE(void) ap_args_to_table(request_rec *r, apr_table_t **table)
 762 {
 763     apr_table_t *t = apr_table_make(r->pool, 10);
 764     argstr_to_table(apr_pstrdup(r->pool, r->args), t);
 765     *table = t;
 766 }
 767
 768 AP_DECLARE(apr_status_t) ap_body_to_table(request_rec *r, apr_table_t **table)
 769 {
 770     apr_bucket_brigade *bb;
 771     apr_bucket_brigade *tmpbb;
 772     apr_status_t rv = APR_SUCCESS;
 773
 774     if (r->body_table) {
 775         *table = r->body_table;
 776         return APR_SUCCESS;
 777     }
 778
 779     *table = NULL;
 780
 781     bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
 782     tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
 783
 784     do {
 785         apr_off_t len;
 786
 787         rv = ap_get_brigade(r->input_filters, tmpbb, AP_MODE_READBYTES,
 788                             APR_BLOCK_READ, AP_IOBUFSIZE);
 789         if (rv) {
 790             break;
 791         }
 792
 793         rv = apr_brigade_length(tmpbb, 1, &len);
 794         if (rv) {
 795             break;
 796         }
 797
 798         if (len == 0) {
 799             break;
 800         }
 801
 802         APR_BRIGADE_CONCAT(bb, tmpbb);
 803     } while(1);
 804
 805     if (!rv) {
 806         r->body_table = apr_table_make(r->pool, 10);
 807
 808         if (!APR_BRIGADE_EMPTY(bb)) {
 809             char *buffer;
 810             apr_off_t len;
 811             apr_pool_t *tpool;
 812
 813             apr_pool_create(&tpool, r->pool);
 814
 815             rv = apr_brigade_length(bb, 1, &len);
 816
 817             if (!rv) {
 818                 apr_size_t total;
 819                 /* XXX where's our test that len fits in memory???
 820                  * theoretically can be a large file > ram space
 821                  */
 822                 buffer = apr_palloc(tpool, len+1);
 823
 824                 total = len+1;
 825
 826                 rv = apr_brigade_flatten(bb, buffer, &total);
 827
 828                 buffer[total] = '\0';
 829
 830                 argstr_to_table(buffer, r->body_table);
 831             }
 832             apr_pool_destroy(tpool);
 833         }
 834     }
 835
 836     apr_brigade_destroy(bb);
 837     apr_brigade_destroy(tmpbb);
 838
 839     *table = r->body_table;
 840
 841     return rv;
 842 }
 843
 844