mod_headers.c module based on 2.2.25

mod_headers.c (text/plain), 28.16 KB, created by Philippe Lantin on 2013-09-25 21:56:03 UTC

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Description: mod_headers.c module based on 2.2.25

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Creator: Philippe Lantin

Created: 2013-09-25 21:56:03 UTC

Size: 28.16 KB

patch

obsolete

>/* Licensed to the Apache Software Foundation (ASF) under one or more > * contributor license agreements. See the NOTICE file distributed with > * this work for additional information regarding copyright ownership. > * The ASF licenses this file to You under the Apache License, Version 2.0 > * (the "License"); you may not use this file except in compliance with > * the License. You may obtain a copy of the License at > * > * http://www.apache.org/licenses/LICENSE-2.0 > * > * Unless required by applicable law or agreed to in writing, software > * distributed under the License is distributed on an "AS IS" BASIS, > * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. > * See the License for the specific language governing permissions and > * limitations under the License. > */ > >/* > * mod_headers.c: Add/append/remove HTTP response headers > * Written by Paul Sutton, paul@ukweb.com, 1 Oct 1996 > * > * The Header directive can be used to add/replace/remove HTTP headers > * within the response message. The RequestHeader directive can be used > * to add/replace/remove HTTP headers before a request message is processed. > * Valid in both per-server and per-dir configurations. > * > * Syntax is: > * > * Header action header value > * RequestHeader action header value > * > * Where action is one of: > * set - set this header, replacing any old value > * add - add this header, possible resulting in two or more > * headers with the same name > * append - append this text onto any existing header of this same > * merge - merge this text onto any existing header of this same, > * avoiding duplicate values > * unset - remove this header > * edit - transform the header value according to a regexp > * > * Where action is unset, the third argument (value) should not be given. > * The header name can include the colon, or not. > * > * The Header and RequestHeader directives can only be used where allowed > * by the FileInfo override. > * > * When the request is processed, the header directives are processed in > * this order: firstly, the main server, then the virtual server handling > * this request (if any), then any <Directory> sections (working downwards > * from the root dir), then an <Location> sections (working down from > * shortest URL component), the any <File> sections. This order is > * important if any 'set' or 'unset' actions are used. For example, > * the following two directives have different effect if applied in > * the reverse order: > * > * Header append Author "John P. Doe" > * Header unset Author > * > * Examples: > * > * To set the "Author" header, use > * Header add Author "John P. Doe" > * > * To remove a header: > * Header unset Author > * > */ > >#include "apr.h" >#include "apr_lib.h" >#include "apr_strings.h" >#include "apr_buckets.h" > >#include "apr_hash.h" >#define APR_WANT_STRFUNC >#include "apr_want.h" > >#include "httpd.h" >#include "http_config.h" >#include "http_request.h" >#include "http_log.h" >#include "util_filter.h" >#include "http_protocol.h" > >#include "mod_ssl.h" /* for the ssl_var_lookup optional function defn */ > >/* format_tag_hash is initialized during pre-config */ >static apr_hash_t *format_tag_hash; > >typedef enum { > hdr_add = 'a', /* add header (could mean multiple hdrs) */ > hdr_set = 's', /* set (replace old value) */ > hdr_append = 'm', /* append (merge into any old value) */ > hdr_merge = 'g', /* merge (merge, but avoid duplicates) */ > hdr_unset = 'u', /* unset header */ > hdr_echo = 'e', /* echo headers from request to response */ > hdr_edit = 'r', /* change value by regexp, match once */ > hdr_edit_r = 'R' /* change value by regexp, everymatch */ >} hdr_actions; > >/* > * magic cmd->info values > */ >static char hdr_in = '0'; /* RequestHeader */ >static char hdr_out = '1'; /* Header onsuccess */ >static char hdr_err = '2'; /* Header always */ > >/* > * There is an array of struct format_tag per Header/RequestHeader > * config directive > */ >typedef struct { > const char* (*func)(request_rec *r,char *arg); > char *arg; >} format_tag; > >/* 'Magic' condition_var value to run action in post_read_request */ >static const char* condition_early = "early"; >/* > * There is one "header_entry" per Header/RequestHeader config directive > */ >typedef struct { > hdr_actions action; > const char *header; > apr_array_header_t *ta; /* Array of format_tag structs */ > ap_regex_t *regex; > const char *condition_var; > const char *subs; >} header_entry; > >/* echo_do is used for Header echo to iterate through the request headers*/ >typedef struct { > request_rec *r; > header_entry *hdr; >} echo_do; > >/* edit_do is used for Header edit to iterate through the request headers */ >typedef struct { > apr_pool_t *p; > header_entry *hdr; > apr_table_t *t; >} edit_do; > >/* > * headers_conf is our per-module configuration. This is used as both > * a per-dir and per-server config > */ >typedef struct { > apr_array_header_t *fixup_in; > apr_array_header_t *fixup_out; > apr_array_header_t *fixup_err; >} headers_conf; > >module AP_MODULE_DECLARE_DATA headers_module; > >/* Pointer to ssl_var_lookup, if available. */ >static APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *header_ssl_lookup = NULL; > >/* > * Tag formatting functions > */ >static const char *constant_item(request_rec *r, char *stuff) >{ > return stuff; >} >static const char *header_request_duration(request_rec *r, char *a) >{ > return apr_psprintf(r->pool, "D=%" APR_TIME_T_FMT, > (apr_time_now() - r->request_time)); >} >static const char *header_request_time(request_rec *r, char *a) >{ > return apr_psprintf(r->pool, "t=%" APR_TIME_T_FMT, r->request_time); >} >static const char *header_request_utime(request_rec *r, char *seconds) >{ > apr_time_t base; > apr_time_t additional; > apr_time_t expires; > int additional_sec; > char *timestr; > > base = r->request_time; > additional_sec = atoi(seconds); > additional = apr_time_from_sec(additional_sec); > expires = base + additional; > if (expires < r->request_time) { > expires = r->request_time; > } > timestr = apr_palloc(r->pool, APR_RFC822_DATE_LEN); > apr_rfc822_date(timestr, expires); > return timestr; >} > >/* unwrap_header returns HDR with any newlines converted into > * whitespace if necessary. */ >static const char *unwrap_header(apr_pool_t *p, const char *hdr) >{ > if (ap_strchr_c(hdr, APR_ASCII_LF) || ap_strchr_c(hdr, APR_ASCII_CR)) { > char *ptr; > > hdr = ptr = apr_pstrdup(p, hdr); > > do { > if (*ptr == APR_ASCII_LF || *ptr == APR_ASCII_CR) > *ptr = APR_ASCII_BLANK; > } while (*ptr++); > } > return hdr; >} > >static const char *header_request_env_var(request_rec *r, char *a) >{ > const char *s = apr_table_get(r->subprocess_env,a); > > if (s) > return unwrap_header(r->pool, s); > else > return "(null)"; >} > >static const char *header_request_ssl_var(request_rec *r, char *name) >{ > if (header_ssl_lookup) { > const char *val = header_ssl_lookup(r->pool, r->server, > r->connection, r, name); > if (val && val[0]) > return unwrap_header(r->pool, val); > else > return "(null)"; > } > else { > return "(null)"; > } >} > >/* > * Config routines > */ > >static void *create_headers_dir_config(apr_pool_t *p, char *d) >{ > headers_conf *conf = apr_pcalloc(p, sizeof(*conf)); > > conf->fixup_in = apr_array_make(p, 2, sizeof(header_entry)); > conf->fixup_out = apr_array_make(p, 2, sizeof(header_entry)); > conf->fixup_err = apr_array_make(p, 2, sizeof(header_entry)); > > return conf; >} > >static void *merge_headers_config(apr_pool_t *p, void *basev, void *overridesv) >{ > headers_conf *newconf = apr_pcalloc(p, sizeof(*newconf)); > headers_conf *base = basev; > headers_conf *overrides = overridesv; > > newconf->fixup_in = apr_array_append(p, base->fixup_in, > overrides->fixup_in); > newconf->fixup_out = apr_array_append(p, base->fixup_out, > overrides->fixup_out); > newconf->fixup_err = apr_array_append(p, base->fixup_err, > overrides->fixup_err); > > return newconf; >} > >static char *parse_misc_string(apr_pool_t *p, format_tag *tag, const char **sa) >{ > const char *s; > char *d; > > tag->func = constant_item; > > s = *sa; > while (*s && *s != '%') { > s++; > } > /* > * This might allocate a few chars extra if there's a backslash > * escape in the format string. > */ > tag->arg = apr_palloc(p, s - *sa + 1); > > d = tag->arg; > s = *sa; > while (*s && *s != '%') { > if (*s != '\\') { > *d++ = *s++; > } > else { > s++; > switch (*s) { > case '\\': > *d++ = '\\'; > s++; > break; > case 'r': > *d++ = '\r'; > s++; > break; > case 'n': > *d++ = '\n'; > s++; > break; > case 't': > *d++ = '\t'; > s++; > break; > default: > /* copy verbatim */ > *d++ = '\\'; > /* > * Allow the loop to deal with this *s in the normal > * fashion so that it handles end of string etc. > * properly. > */ > break; > } > } > } > *d = '\0'; > > *sa = s; > return NULL; >} > >static char *parse_format_tag(apr_pool_t *p, format_tag *tag, const char **sa) >{ > const char *s = *sa; > const char * (*tag_handler)(request_rec *,char *); > > /* Handle string literal/conditionals */ > if (*s != '%') { > return parse_misc_string(p, tag, sa); > } > s++; /* skip the % */ > > /* Pass through %% or % at end of string as % */ > if ((*s == '%') || (*s == '\0')) { > tag->func = constant_item; > tag->arg = "%"; > if (*s) > s++; > *sa = s; > return NULL; > } > > tag->arg = '\0'; > /* grab the argument if there is one */ > if (*s == '{') { > ++s; > tag->arg = ap_getword(p,&s,'}'); > } > > tag_handler = (const char * (*)(request_rec *,char *))apr_hash_get(format_tag_hash, s++, 1); > > if (!tag_handler) { > char dummy[2]; > dummy[0] = s[-1]; > dummy[1] = '\0'; > return apr_pstrcat(p, "Unrecognized header format %", dummy, NULL); > } > tag->func = tag_handler; > > *sa = s; > return NULL; >} > >/* > * A format string consists of white space, text and optional format > * tags in any order. E.g., > * > * Header add MyHeader "Free form text %D %t more text" > * > * Decompose the format string into its tags. Each tag (struct format_tag) > * contains a pointer to the function used to format the tag. Then save each > * tag in the tag array anchored in the header_entry. > */ >static char *parse_format_string(apr_pool_t *p, header_entry *hdr, const char *s) >{ > char *res; > > /* No string to parse with unset and echo commands */ > if (hdr->action == hdr_unset || > hdr->action == hdr_edit || > hdr->action == hdr_edit_r || > hdr->action == hdr_echo) { > return NULL; > } > > hdr->ta = apr_array_make(p, 10, sizeof(format_tag)); > > while (*s) { > if ((res = parse_format_tag(p, (format_tag *) apr_array_push(hdr->ta), &s))) { > return res; > } > } > return NULL; >} > >/* handle RequestHeader and Header directive */ >static APR_INLINE const char *header_inout_cmd(cmd_parms *cmd, > void *indirconf, > const char *action, > const char *hdr, > const char *value, > const char *subs, > const char *envclause) >{ > headers_conf *dirconf = indirconf; > const char *condition_var = NULL; > const char *colon; > header_entry *new; > > apr_array_header_t *fixup = (cmd->info == &hdr_in) > ? dirconf->fixup_in : (cmd->info == &hdr_err) > ? dirconf->fixup_err > : dirconf->fixup_out; > > new = (header_entry *) apr_array_push(fixup); > > if (!strcasecmp(action, "set")) > new->action = hdr_set; > else if (!strcasecmp(action, "add")) > new->action = hdr_add; > else if (!strcasecmp(action, "append")) > new->action = hdr_append; > else if (!strcasecmp(action, "merge")) > new->action = hdr_merge; > else if (!strcasecmp(action, "unset")) > new->action = hdr_unset; > else if (!strcasecmp(action, "echo")) > new->action = hdr_echo; > else if (!strcasecmp(action, "edit")) > new->action = hdr_edit; > else if (!strcasecmp(action, "edit*")) > new->action = hdr_edit_r; > else > return "first argument must be 'add', 'set', 'append', 'merge', " > "'unset', 'echo', 'edit', or 'edit*'."; > > if (new->action == hdr_edit || new->action == hdr_edit_r) { > if (subs == NULL) { > return "Header edit requires a match and a substitution"; > } > new->regex = ap_pregcomp(cmd->pool, value, AP_REG_EXTENDED); > if (new->regex == NULL) { > return "Header edit regex could not be compiled"; > } > new->subs = subs; > } > else { > /* there's no subs, so envclause is really that argument */ > if (envclause != NULL) { > return "Too many arguments to directive"; > } > envclause = subs; > } > if (new->action == hdr_unset) { > if (value) { > if (envclause) { > return "header unset takes two arguments"; > } > envclause = value; > value = NULL; > } > } > else if (new->action == hdr_echo) { > ap_regex_t *regex; > > if (value) { > if (envclause) { > return "Header echo takes two arguments"; > } > envclause = value; > value = NULL; > } > if (cmd->info != &hdr_out && cmd->info != &hdr_err) > return "Header echo only valid on Header " > "directives"; > else { > regex = ap_pregcomp(cmd->pool, hdr, AP_REG_EXTENDED | AP_REG_NOSUB); > if (regex == NULL) { > return "Header echo regex could not be compiled"; > } > } > new->regex = regex; > } > else if (!value) > return "Header requires three arguments"; > > /* Handle the envclause on Header */ > if (envclause != NULL) { > if (strcasecmp(envclause, "early") == 0) { > condition_var = condition_early; > } > else { > if (strncasecmp(envclause, "env=", 4) != 0) { > return "error: envclause should be in the form env=envar"; > } > if ((envclause[4] == '\0') > || ((envclause[4] == '!') && (envclause[5] == '\0'))) { > return "error: missing environment variable name. " > "envclause should be in the form env=envar "; > } > condition_var = envclause + 4; > } > } > > if ((colon = ap_strchr_c(hdr, ':'))) { > hdr = apr_pstrmemdup(cmd->pool, hdr, colon-hdr); > } > > new->header = hdr; > new->condition_var = condition_var; > > return parse_format_string(cmd->pool, new, value); >} > >/* Handle all (xxx)Header directives */ >static const char *header_cmd(cmd_parms *cmd, void *indirconf, > const char *args) >{ > const char *action; > const char *hdr; > const char *val; > const char *envclause; > const char *subs; > > action = ap_getword_conf(cmd->pool, &args); > if (cmd->info == &hdr_out) { > if (!strcasecmp(action, "always")) { > cmd->info = &hdr_err; > action = ap_getword_conf(cmd->pool, &args); > } > else if (!strcasecmp(action, "onsuccess")) { > action = ap_getword_conf(cmd->pool, &args); > } > } > hdr = ap_getword_conf(cmd->pool, &args); > val = *args ? ap_getword_conf(cmd->pool, &args) : NULL; > subs = *args ? ap_getword_conf(cmd->pool, &args) : NULL; > envclause = *args ? ap_getword_conf(cmd->pool, &args) : NULL; > > if (*args) { > return apr_pstrcat(cmd->pool, cmd->cmd->name, > " has too many arguments", NULL); > } > > return header_inout_cmd(cmd, indirconf, action, hdr, val, subs, envclause); >} > >/* > * Process the tags in the format string. Tags may be format specifiers > * (%D, %t, etc.), whitespace or text strings. For each tag, run the handler > * (formatter) specific to the tag. Handlers return text strings. > * Concatenate the return from each handler into one string that is > * returned from this call. > */ >static char* process_tags(header_entry *hdr, request_rec *r) >{ > int i; > const char *s; > char *str = NULL; > > format_tag *tag = (format_tag*) hdr->ta->elts; > > for (i = 0; i < hdr->ta->nelts; i++) { > s = tag[i].func(r, tag[i].arg); > if (str == NULL) > str = apr_pstrdup(r->pool, s); > else > str = apr_pstrcat(r->pool, str, s, NULL); > } > return str ? str : ""; >} >static const char *process_regexp(header_entry *hdr, const char *value, > apr_pool_t *pool) >{ > unsigned int nmatch = 10; > ap_regmatch_t pmatch[10]; > const char *subs; > const char *remainder; > char *ret; > int diffsz; > if (ap_regexec(hdr->regex, value, nmatch, pmatch, 0)) { > /* no match, nothing to do */ > return value; > } > subs = ap_pregsub(pool, hdr->subs, value, nmatch, pmatch); > diffsz = strlen(subs) - (pmatch[0].rm_eo - pmatch[0].rm_so); > if (hdr->action == hdr_edit) { > remainder = value + pmatch[0].rm_eo; > } > else { /* recurse to edit multiple matches if applicable */ > remainder = process_regexp(hdr, value + pmatch[0].rm_eo, pool); > diffsz += strlen(remainder) - strlen(value + pmatch[0].rm_eo); > } > ret = apr_palloc(pool, strlen(value) + 1 + diffsz); > memcpy(ret, value, pmatch[0].rm_so); > strcpy(ret + pmatch[0].rm_so, subs); > strcat(ret, remainder); > return ret; >} > >static int echo_header(echo_do *v, const char *key, const char *val) >{ > /* If the input header (key) matches the regex, echo it intact to > * r->headers_out. > */ > if (!ap_regexec(v->hdr->regex, key, 0, NULL, 0)) { > apr_table_add(v->r->headers_out, key, val); > } > > return 1; >} > >static int edit_header(void *v, const char *key, const char *val) >{ > edit_do *ed = (edit_do *)v; > > apr_table_addn(ed->t, key, process_regexp(ed->hdr, val, ed->p)); > return 1; >} > >static int add_them_all(void *v, const char *key, const char *val) >{ > apr_table_t *headers = (apr_table_t *)v; > > apr_table_addn(headers, key, val); > return 1; >} > >static void do_headers_fixup(request_rec *r, apr_table_t *headers, > apr_array_header_t *fixup, int early) >{ > echo_do v; > int i; > const char *val; > > for (i = 0; i < fixup->nelts; ++i) { > header_entry *hdr = &((header_entry *) (fixup->elts))[i]; > const char *envar = hdr->condition_var; > > /* ignore early headers in late calls */ > if (!early && (envar == condition_early)) { > continue; > } > /* ignore late headers in early calls */ > else if (early && (envar != condition_early)) { > continue; > } > /* Have any conditional envar-controlled Header processing to do? */ > else if (envar && !early) { > if (*envar != '!') { > if (apr_table_get(r->subprocess_env, envar) == NULL) > continue; > } > else { > if (apr_table_get(r->subprocess_env, &envar[1]) != NULL) > continue; > } > } > > switch (hdr->action) { > case hdr_add: > apr_table_addn(headers, hdr->header, process_tags(hdr, r)); > break; > case hdr_append: > apr_table_mergen(headers, hdr->header, process_tags(hdr, r)); > break; > case hdr_merge: > val = apr_table_get(headers, hdr->header); > if (val == NULL) { > apr_table_addn(headers, hdr->header, process_tags(hdr, r)); > } else { > char *new_val = process_tags(hdr, r); > apr_size_t new_val_len = strlen(new_val); > int tok_found = 0; > > /* modified version of logic in ap_get_token() */ > while (*val) { > const char *tok_start; > > while (*val && apr_isspace(*val)) > ++val; > > tok_start = val; > > while (*val && *val != ',') { > if (*val++ == '"') > while (*val) > if (*val++ == '"') > break; > } > > if (new_val_len == (apr_size_t)(val - tok_start) > && !strncmp(tok_start, new_val, new_val_len)) { > tok_found = 1; > break; > } > > if (*val) > ++val; > } > > if (!tok_found) { > apr_table_mergen(headers, hdr->header, new_val); > } > } > break; > case hdr_set: > if (!strcasecmp(hdr->header, "Content-Type")) { > ap_set_content_type(r, process_tags(hdr, r)); > } > apr_table_setn(headers, hdr->header, process_tags(hdr, r)); > break; > case hdr_unset: > apr_table_unset(headers, hdr->header); > break; > case hdr_echo: > v.r = r; > v.hdr = hdr; > apr_table_do((int (*) (void *, const char *, const char *)) > echo_header, (void *) &v, r->headers_in, NULL); > break; > case hdr_edit: > case hdr_edit_r: > if (apr_table_get(headers, hdr->header)) { > edit_do ed; > > ed.p = r->pool; > ed.hdr = hdr; > ed.t = apr_table_make(r->pool, 5); > apr_table_do(edit_header, (void *) &ed, headers, hdr->header, > NULL); > apr_table_unset(headers, hdr->header); > apr_table_do(add_them_all, (void *) headers, ed.t, NULL); > } > break; > } > } >} > >static void ap_headers_insert_output_filter(request_rec *r) >{ > headers_conf *dirconf = ap_get_module_config(r->per_dir_config, > &headers_module); > > if (dirconf->fixup_out->nelts || dirconf->fixup_err->nelts) { > ap_add_output_filter("FIXUP_HEADERS_OUT", NULL, r, r->connection); > } >} > >/* > * Make sure our error-path filter is in place. > */ >static void ap_headers_insert_error_filter(request_rec *r) >{ > headers_conf *dirconf = ap_get_module_config(r->per_dir_config, > &headers_module); > > if (dirconf->fixup_err->nelts) { > ap_add_output_filter("FIXUP_HEADERS_ERR", NULL, r, r->connection); > } >} > >static apr_status_t ap_headers_output_filter(ap_filter_t *f, > apr_bucket_brigade *in) >{ > headers_conf *dirconf = ap_get_module_config(f->r->per_dir_config, > &headers_module); > > ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, f->r->server, > "headers: ap_headers_output_filter()"); > > /* do the fixup */ > do_headers_fixup(f->r, f->r->err_headers_out, dirconf->fixup_err, 0); > do_headers_fixup(f->r, f->r->headers_out, dirconf->fixup_out, 0); > > /* remove ourselves from the filter chain */ > ap_remove_output_filter(f); > > /* send the data up the stack */ > return ap_pass_brigade(f->next,in); >} > >/* > * Make sure we propagate any "Header always" settings on the error > * path through http_protocol.c. > */ >static apr_status_t ap_headers_error_filter(ap_filter_t *f, > apr_bucket_brigade *in) >{ > headers_conf *dirconf; > > dirconf = ap_get_module_config(f->r->per_dir_config, > &headers_module); > ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, f->r->server, > "headers: ap_headers_error_filter()"); > > /* > * Add any header fields defined by "Header always" to r->err_headers_out. > * Server-wide first, then per-directory to allow overriding. > */ > do_headers_fixup(f->r, f->r->err_headers_out, dirconf->fixup_err, 0); > > /* > * We've done our bit; remove ourself from the filter chain so there's > * no possibility we'll be called again. > */ > ap_remove_output_filter(f); > > /* > * Pass the buck. (euro?) > */ > return ap_pass_brigade(f->next, in); >} > >static apr_status_t ap_headers_fixup(request_rec *r) >{ > headers_conf *dirconf = ap_get_module_config(r->per_dir_config, > &headers_module); > > /* do the fixup */ > if (dirconf->fixup_in->nelts) { > do_headers_fixup(r, r->headers_in, dirconf->fixup_in, 0); > } > > return DECLINED; >} >static apr_status_t ap_headers_early(request_rec *r) >{ > headers_conf *dirconf = ap_get_module_config(r->per_dir_config, > &headers_module); > > /* do the fixup */ > if (dirconf->fixup_in->nelts) { > do_headers_fixup(r, r->headers_in, dirconf->fixup_in, 1); > } > if (dirconf->fixup_err->nelts) { > do_headers_fixup(r, r->err_headers_out, dirconf->fixup_err, 1); > } > if (dirconf->fixup_out->nelts) { > do_headers_fixup(r, r->headers_out, dirconf->fixup_out, 1); > } > > return DECLINED; >} > >static const command_rec headers_cmds[] = >{ > AP_INIT_RAW_ARGS("Header", header_cmd, &hdr_out, OR_FILEINFO, > "an optional condition, an action, header and value " > "followed by optional env clause"), > AP_INIT_RAW_ARGS("RequestHeader", header_cmd, &hdr_in, OR_FILEINFO, > "an action, header and value followed by optional env " > "clause"), > {NULL} >}; > >static void register_format_tag_handler(const char *tag, > const void *tag_handler) >{ > apr_hash_set(format_tag_hash, tag, 1, tag_handler); >} > >static int header_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp) >{ > format_tag_hash = apr_hash_make(p); > register_format_tag_handler("D", (const void *)header_request_duration); > register_format_tag_handler("t", (const void *)header_request_time); > register_format_tag_handler("e", (const void *)header_request_env_var); > register_format_tag_handler("s", (const void *)header_request_ssl_var); > register_format_tag_handler("u", (const void *)header_request_utime); > > return OK; >} > >static int header_post_config(apr_pool_t *pconf, apr_pool_t *plog, > apr_pool_t *ptemp, server_rec *s) >{ > header_ssl_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); > return OK; >} > >static void register_hooks(apr_pool_t *p) >{ > ap_register_output_filter("FIXUP_HEADERS_OUT", ap_headers_output_filter, > NULL, AP_FTYPE_CONTENT_SET); > ap_register_output_filter("FIXUP_HEADERS_ERR", ap_headers_error_filter, > NULL, AP_FTYPE_CONTENT_SET); > ap_hook_pre_config(header_pre_config,NULL,NULL,APR_HOOK_MIDDLE); > ap_hook_post_config(header_post_config,NULL,NULL,APR_HOOK_MIDDLE); > ap_hook_insert_filter(ap_headers_insert_output_filter, NULL, NULL, APR_HOOK_LAST); > ap_hook_insert_error_filter(ap_headers_insert_error_filter, > NULL, NULL, APR_HOOK_LAST); > ap_hook_fixups(ap_headers_fixup, NULL, NULL, APR_HOOK_LAST); > ap_hook_post_read_request(ap_headers_early, NULL, NULL, APR_HOOK_FIRST); >} > >module AP_MODULE_DECLARE_DATA headers_module = >{ > STANDARD20_MODULE_STUFF, > create_headers_dir_config, /* dir config creater */ > merge_headers_config, /* dir merger --- default is to override */ > NULL, /* server config */ > NULL, /* merge server configs */ > headers_cmds, /* command apr_table_t */ > register_hooks /* register hooks */ >}; View Attachment As Raw

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